Patent Grant
7175585
The present invention relates to a heat-insulating container made of paper, which is used for an instant dried food to be become eatable by pouring boiled water over it and an apparatus suitable for producing at least one part of the container.
As a heat-insulating container made paper mainly used for instant dried Chinese noodles, there has widely been used a container in which a paper cup body surrounded over its outer periphery with a heat-insulating corrugated member subjected to a process so as to make an alternate arrangement of narrow projections and recesses in the longitudinal direction of the cup body.
In Japanese Patent Provisional Publication No. H8-113274, there is proposed a heat-insulating container in which a change in its cross-sectional shape is made so that the total area of concave portions on the outer surfaces of the container is decreased and the total area of flat portions thereon is increased. Such a container has been put to practical use.
In Japanese Patent Provisional Publication No. H4-45216 and Japanese Patent Provisional Publication No. H8-104372, there is proposed a heat-insulating container, in which a heat-insulating member subjected to a corrugating process or an embossing process so that no irregularity is formed on the outer surface of the container.
In Japanese Utility Model Provisional Publication No. 4-45212, there is made, on the other hand, a proposal that a heat-insulating property is given by a gap formed between a double-walled cup body.
The above-described container having the cup body surrounded with the heat-insulating corrugated member has a problem that the container has an unnecessarily larger thickness even in the upper portion thereof, which is not brought into contact with a hand, regardless of the cross-sectional shape of the heat-insulating member. The irregularity on the outer surface of the container may become obstacle to a high grade design to be given to the container, and characters, patterns and the like printed on the surface thereof may be made unclear and vague, thus causing problems.
In order to solve such problems of the external appearance of the container, there is made a proposal to cause the above-mentioned container to be surrounded with an additional liner or thin sheet of paper in Japanese Utility Model Provisional Publication No. S49-87479 and Japanese Utility Model Publication No. H4-45216. The container obtained in accordance with such a proposal has an uneconomic problem that the high production cost is required, an external appearance problem that the heat-insulating container may has the irregular bottom and the narrow projections and recesses or the embossed portions may be visible from the bottom, and an unhygienic problem that dust or a liquid may enter gaps of these portions.
Such a heat-insulating container 50 does not use any specific heat-insulating member and has therefore no disadvantage caused by the heat-insulating member. When the container is actually held at the central portion of the side wall thereof with a hand, the sleeve 55 may however easily be warped inward to decrease the capacity of the heat-insulating space, thus deteriorating the heat-insulating property.
In addition, a container in which a sleeve is disposed on an outer periphery of a cup body is also proposed, for example, in Japanese Utility Model Provisional Publication No. S52-97282, and Japanese Patent Provisional Publication No. H4-201840. The container disclosed in these publications is provided with an outward projecting rib and the sleeve bonded to the rib.
However, in such structure, since the rib is formed into a round or triangular shape in its cross-section, only a ridge portion of the rib contacts the sleeve, so that a bonding area between the rib and the sleeve reduces, causing the lack of the bonding strength. Since the position of the rib changes variously in accordance with the type of the container, it is necessary to adjust the position to which the adhesive agent is applied in accordance with the position of the rib, so that a preparation for the process may be troublesome. In particular, if the rib functions as the Peter line indicating proper level of liquid poured in the container, the position of the rib often changes in accordance with a kind of a product packaged in the container, and thus the above mentioned problem may be more serious. Also, if the Peter line is adjacent to the curled portion of the cup body, distance between the sleeve and the cup body reduces and the resistance force during the combination process may increase to thereby cause an assembling error.
Further, it is desired to provide an apparatus capable of producing the container efficiently. In particular, it is preferable to form the sleeve completely without changing a mandrel on which a sheet-like blank as a material of the sleeve is curled. It is also desired to assemble the sleeve and the cup body correctly and efficiently.
Furthermore, it is particularly desired to provide an apparatus capable of facilitate a process for forming the rib on the side wall of the cup body. In Japanese Patent Provisional Publication No. H4-97833, there is disclosed a rib-processing apparatus in which an expandable chuck is inserted into the cup body, and the chuck expands outward at a predetermined position in the cup body to enlarge the container outside, thereby forming the rib.
However, since the apparatus disclosed in the above publication forms the rib on the side wall of the cup body all at once over an entire periphery thereof, it is necessary to add a relatively great force to the side wall with using force-magnification means, such as a wedge or the like, even if the rib is relatively small. Therefore, it is difficult to form a large rib. Also, since the chuck is driven in the cup body, it is necessary to locate one part of a driving mechanism for the chuck in a narrow space in the cup body, so that structure of the mechanism becomes complex. It needs a long time to take the chuck in and out against the cup body, so that it is difficult to form the rib efficiently.
One of objects of the present invention, which was made in order to solve the above-mentioned problems, is to provide a heat-insulating container made of paper, which has a stable heat-insulating property, a high grade design, a high degree of freedom in indication by printing on the outer surface of the container, and a lower production cost.
In order to attain the above-described object, the heat-insulating container of the present invention comprises:
a paper cup body with a bottom, which has an inner surface coated with a polyolefin resin and is provided with an outward curled portion formed at an upper opening end of the cup body and at least one horizontal rib formed on a side wall of the cup body so as to project outward therefrom; and
an inverse-frustoconical paper sleeve provided with an inward curled portion formed at a lower end of the sleeve,
the cup body and the sleeve are integrally combined with each other so that an upper end of the sleeve is joined to an outer periphery of the side wall of the cup body, which is adjacent to the outward curled portion of the cup body, and an inner surface of the inward curled portion of the sleeve is joined to an outer periphery of a lower portion of the side wall of the cup body.
Any number of the horizontal rib may be formed so as to extend continuously over the entire periphery or intermittently in the circumferential direction of the side wall of the cup body.
A heat-insulating corrugated member may be arranged between the sleeve and the upper portion of the side wall of the cup body.
According to the above invention, it is possible to provide the heat-insulating container made of paper, which is excellent in design and has a stable heat-insulating property, a smooth outer surface, a high grade external appearance and a high degree of freedom in indication by printing.
The container has an appropriate rigidity so as to prevent the occurrence of warp of the side wall, and it can therefore be easily held with a hand, with the result that it is possible to improve safety required for the container, which is to be filled with boiled water to make an instant dried food eatable received therein.
In addition, it is possible to prevent costs for material and production from rising, thus permitting the provision of the heat-insulating container at a low cost.
The heat-insulating container of the present invention is made of paper so as to be disposed easily without being subjected to segregated disposal and it is also easy to decrease the volume of the container in the light of disposal thereof, thus leading to an excellent disposability. The container can easily be recycled. Thus, the present invention contributes to decrease in adverse influence on environment.
Another object of the present invention is to provide a heat-insulating container having improved structure in which a sleeve is surely bonded to a cup body.
In order to attain the above-mentioned object, there is provided a heat-insulating container comprising:
a cup body having a side wall and a bottom disposed on one end of the side wall, the side wall being provided with an outward projecting rib extending in a circumferential direction thereof and being provided at another end thereof with an outward curled portion; and
a sleeve disposed outside the side wall with leaving a space therebetween and bonded to the side wall in a bonding area defined so as to be adjacent to the outward curled portion of the cup body,
wherein the outward projecting rib is disposed only on an area apart from the bonding area.
According to the above container, since the outward projecting rib is eliminated from the bonding area, the sleeve and the side wall of the cup body can widely contact each other, so that the size of the bonding area is increase to thereby improve the bonding strength between the sleeve and the cup body. The bonding area is always disposed adjacently to the outward curled portion formed on a periphery of the opening end portion of the cup body, so that the position to be applied with the adhesive agent is not changed, regardless of the position of the outward projecting rib.
The sleeve may be provided at one end thereof with an inward curled portion capable of contacting an outer periphery of the one end of the side wall.
The side wall of the cup body may be provided with an inward projecting rib extending in the circumferential direction thereof. The inward projecting rib can be included in the bonding area, to thereby improve rigidity of the cup body without reducing the bonding are. The inward projecting rib may function as a line indicating a proper level of liquid poured into the cup body. The rib as the Peter line may be provided in the bonding area so as to be close to the outward curled portion.
According to still another aspect of the present invention, there is provided a heat-insulating container comprising:
a cup body having a side wall and a bottom disposed on one end of the side wall; and
a sleeve disposed outside the side wall with leaving a space therebetween and bonded to the side wall;
wherein a rib indicating a proper level of liquid poured into the cup body is provided on the side wall so as to project inward therefrom.
In this case, it is possible to keep the bonding area sufficiently by defining it so as to include the rib as the Peter line.
According to still another aspect of the present invention, there is provided a heat-insulating container comprising:
a cup body having a side wall and a bottom disposed on one end of the side wall, the side wall being provided at another end thereof with an outward curled portion; and
a sleeve disposed outside the side wall with leaving a space therebetween and bonded to the side wall in a bonding area defined so as to be adjacent to the outward curled portion of the cup body;
wherein the side wall is provided with an inward projecting rib included in the bonding area.
In this case, it is possible to keep the bonding area sufficiently by defining it so as to beyond the inward projecting rib toward the bottom of the cup body.
Still another object of the present invention is to provide a producing apparatus which can produce a heat-insulating container efficiently and rationally.
In order to attain the above-mentioned object, there is provided a producing apparatus for combining a sleeve on an outer periphery of a cup body to produce a heat-insulating container comprising:
a sleeve forming section for forming the sleeve by curling a blank sheet cylindrically and joining both ends thereof; and
an assembling section for combining the sleeve on the outer periphery of the cup body;
the assembling section comprises;
a rib-processing device for processing a rib on a side wall of the container;
an adhesive-applying device for applying an adhesive agent on the side wall of the cup body formed with the rib; and
a sleeve-delivering device for putting the sleeve formed by the sleeve forming section on the outer periphery of the cup body on which the adhesive agent is applied.
According to the above producing apparatus, the rib is formed on the cup body and the adhesive agent is applied thereto in the assembling section, while the sleeve is formed from the blank in the sleeve forming section. Then, the formed sleeve is put on the outer periphery of the cup body applied with the adhesive agent to combine them together. Since the processes necessary for producing the container are simultaneously with each other in two sections, it is possible to produce the container efficiently and rationally.
According to still another aspect of the present invention, there is provided a producing apparatus for combining a sleeve on an outer periphery of a cup body to produce a heat-insulating container comprising:
a sleeve holder capable of holding the sleeve;
a cup holder capable of holding the cup body; and
a driving device for circulating the sleeve holder and the cup holder along respective certain circulation paths,
wherein the apparatus is provided along the circulation path of the sleeve holder with a curling device for curling up a sheet-like blank on the sleeve holder and for joining both ends of the curled blank to each other and a sleeve-ejecting device for removing the sleeve from the sleeve holder;
the apparatus is also provided along the circulation path of the cup holder with a cup-body-supplying device for supplying the cup body to the cup holder, a rib-processing device for processing a rib on a side wall of the cup body set on the cup holder, an adhesive-applying device for applying an adhesive agent to the side wall of the cup body formed with the rib, and a sleeve-delivering device for receiving the sleeve ejected by the sleeve-ejecting device and for putting the received sleeve on the outer periphery of the cup body on which the adhesive agent is applied; and
the driving device drives the sleeve holder and the cup holder in such a manner that the cup body on which the adhesive agent is applied is carried in the sleeve-delivering device when the sleeve on the sleeve holder is carried in the sleeve-ejecting device.
In this apparatus, the blank is curled on the sleeve holder to form the sleeve, and the prepared sleeve is removed from the sleeve holder and ejected to the sleeve-delivering device in accordance with the circulation of the sleeve holder. On the other hand, the cup body is set on the cup holder and carried in the sleeve-delivering device, after the rib is processed on the cup body and the adhesive agent is applied thereon. Then, the formed sleeve is put on the outer periphery of the cup body applied with the adhesive agent to combine them together. Since the processes necessary for producing the container are simultaneously with each other in two sections, it is possible to produce the container efficiently and rationally.
A end-curling device for processing a curled portion on one end of the sleeve may be provided on the circulation path of the sleeve holder.
A sleeve-fitting device for pressing the sleeve which is put on the cup body by the sleeve-delivering device toward the cup body with aligning the sleeve with respect to the cup body may be provided on the circulation path of the cup holder.
The apparatus may further comprise a blank-supplying device for supplying the blank to the curling device, and the blank-supplying device may be provided with an adhesive applicator for applying an adhesive agent to one end of the blank.
A sealing device for pressing both ends of the blank overlapped by the curling device to each other may be provided on the circulation path of the sleeve holder. The sealing device may be provided with a heater therein to hasten the adhesion between the cup body and the sleeve.
Still another object of the present invention is to provide a sleeve forming apparatus which can form a sleeve of a heat-insulating container efficiently, especially can perform an operation for curling up a blank on a mandrel and an operation for processing an end-curled portion to the curled blank without changing the mandrel.
In order to attaint the above object, there is provided a sleeve forming apparatus for forming a sheet-like blank into a sleeve used as an outer package of a heat-insulating container, comprising:
a mandrel having a body portion which is capable of being fitted inside the sleeve and which is shorter than the sleeve;
a curling device for curling up a blank on the mandrel in such a manner that one end portion of the blank to which an adhesive agent is applied is located under another end portion of the blank to form a joint line;
a main-sealing device for pressing the joint line onto the mandrel;
an assist-sealing device for nipping one end portion of the joint line, which projects from the mandrel by a pair of nippers;
an end-curling device for pressing a projecting portion of the blank, which projects from the mandrel, toward the mandrel to form a curled portion of the sleeve; and
a sleeve-ejecting device for removing the sleeve from the mandrel.
According to the above sleeve forming apparatus, since one part of the blank curled on the mandrel projects therefrom, it is possible to form a curled portion of the sleeve with the sleeve being mounted on the mandrel. The end portion of the joint line can be pressed by the assist-sealing device, and the joint line is thus joined certainly.
The sleeve forming apparatus may further comprise a blank-supplying device for supplying the blank to the curling device with applying the adhesive agent to the one end of the blank.
The sleeve forming apparatus may further comprise: a conveyor capable of circulating along a predetermined circulation path and having mandrel-attachment portions arranged along the circulation path with leaving a certain interval therebetween, each of the attachment portions being provided with the mandrel; and a driving device for moving the conveyor intermittently by a pitch corresponding to the interval between the mandrel-attachment portions to feed the mandrel on each of the mandrel-attachment portions step by step with respect to a plurality of stations defined along the circulation path; and the curling device, the assist-sealing device, the end-curling device and the sleeve-ejecting device may be distributed to the stations in such a manner that the mandrel is fed to the curling device, the assist-sealing device, the end-curling device and the sleeve-ejecting in this described order in accordance with movements of the conveyor.
The main-sealing device may be movable along the circulation path together with the mandrel.
According to still another aspect of the present invention, there is provided a sleeve forming apparatus for forming a sheet-like blank into a sleeve used as an outer package of a heat-insulating container, comprising:
a conveyor capable of circulating along a predetermined circulation path;
a plurality of mandrels arranged on the conveyor so as to leave a certain interval therebetween in a circulation direction of the conveyor;
a driving device for moving the conveyor intermittently by a pitch corresponding to the interval between the mandrels to feed each of the mandrel step by step with respect to stations defined along the circulation path;
a blank-supplying device for supplying the blank to a curling station selected from the stations with applying an adhesive agent to one end portion of the blank;
a curling device for curling up the supplied blank on each of the mandrels in such a manner that said one end portion of the blank is located under another end portion thereof to form a joint line;
a sealing device for pressing both end portions of the blank, which forms the joint line, to each other; and
a sleeve-ejecting device provided in an ejecting station which is selected from the stations and is located forward from the curling station in the circulation direction for removing the sleeve from each of the mandrels.
According to this sleeve forming apparatus, every time the conveyor moves by a certain amount, one mandrel holding the prepared sleeve is carried in the sleeve-ejecting device. The operation of the curling device and the operation of the sleeve-ejecting device are performed simultaneously with each other, so that the sleeve is formed efficiently.
Each of the mandrels may have a body portion which is capable of being fitted inside the sleeve and which is shorter than the sleeve, and the sealing device may comprise a main-sealing device for pressing the joint line of the blank to each of the mandrels and an assist-sealing device for nipping one end portion of the joint line, which projects from each of the mandrels, by a pair of nippers.
The assist-sealing device may be provided in an assist-sealing station selected from the stations and located between the curling station and the ejecting station.
The assist-sealing device may be provided in an assist-sealing station selected from the stations and located between the curling station and the ejecting station.
An end-curling device for processing an curled portion on a projecting portion of the blank, which projects from each of the mandrels, may be provided in at least one end-curling station selected from the stations and located between the assist-sealing station and the ejecting station.
The stations may include at least two end-curling stations, each of which is provided with the end-curling device.
The sleeve-ejecting device may remove the sleeve from each of the mandrels by pressing a roller onto the sleeve fitted on each mandrel with rotating the roller about an axis perpendicular to an axis of each mandrel.
The conveyor may comprise a turn table capable of turning about a predetermined axis.
Still another object of the present invention is to provide an assembling apparatus which can combine a sleeve and a cup body efficiently and correctly.
In order to attain the above-mentioned object, there is provided an assembling apparatus for combining a sleeve on an outer periphery of a cup body to produce a heat-insulating container, comprising:
a conveyor capable of circulating along a predetermined circulation path;
a cup holder mounted on the conveyor and having a rotary portion capable of rotating about an axis thereof with holding the cup body thereon;
a driving device for moving the conveyor to feed the cup body step by step with respect to stations defined along the circulation path;
a holder driving device provided in a driving station which is selected from the stations and capable of being connected with the rotary portion of the cup holder in the driving station to rotate the cup holder;
an adhesive-applying device provided in an applying station which is selected from the stations and is located forward from the driving station in a circulation direction of the conveyor and capable of applying an adhesive agent on an outer periphery of the cup body; and
a sleeve-delivering device provided in a delivering station which is selected from the stations and is located forward from the applying station in the circulation direction and capable of putting the sleeve on the cup body.
According to the above assembling apparatus, when the cup holder holding the cup body is carried in the holder driving device, the rotary portion of the cup holder is rotatably driven by the holder driving device. Therefore, it is possible to perform various processing, preferably processing of elements extending in the circumferential direction of the cup body, such as the rib, with using the rotation of the cup body. If the cup body is carried into the adhesive-applying device while the cup body keeps its rotation due to inertia thereof, it is possible to apply the adhesive agent on the outer periphery of the cup body without driving the cup holder. Therefore, it is not necessary to provide any driving means for rotating the cup holder in the adhesive-applying device. Also, it is not necessary to provide any driving means for rotating the cup holder on the conveyor. As a result, the structure of the assembling apparatus is simplified.
The rotary portion of the cup holder may be provided with a disk-like rotation input portion coaxial with the cup body, and the holder driving device may comprise a rotation output portion and a drive power source for rotating the rotation output portion.
The adhesive-applying device may be provided with a nozzle ejecting the adhesive agent toward the outer periphery of the cup body.
The cup holder may be provided with an abutment portion capable of being brought into contact with an inner surface of a side wall of the cup body, and the holder driving device may comprise a press mechanism capable of pressing a predetermined model member to the abutment portion with nipping the side wall therebetween to process the side wall.
The conveyor may comprise a turn table capable of turning about a predetermined axis.
According to another aspect of the present invention, there is provided an assembling apparatus for combining a sleeve on an outer periphery of a cup body to produce a heat-insulating container, comprising:
a cup holder capable of holding the cup holder in an inverted posture in a vertical direction;
a sleeve-delivering device capable of putting the sleeve on the outer periphery of the cup body held on the cup holder from the upper side thereof; and
a sleeve-fitting device having a jig capable of contacting an end portion of the sleeve put on the cup body in an axial direction thereof, the sleeve-fitting device being capable of pressing the jig toward the cup body to arrange the sleeve and the cup body with each other in an axial direction thereof;
wherein the jig is provided with an aligning equipment capable of engaging with the sleeve before the sleeve is pressed down by the jig to move the sleeve in a radial direction thereof so as to be aligned with the cup body.
According to the above assembling device, if the sleeve is put on the cup body in a miss-alignment manner, the sleeve is moved in its radial direction by the aligning equipment so as to be aligned against the cup body.
The aligning equipment may comprise pins arranged around the axis of the cup body on the cup holder.
Each of the pins may be supported by a jig body of the jig so as to be movable in the vertical direction, and a lower end portion of each of the pins may be formed with a tapered or rounded portion capable of contacting a lower end of a side wall of the cup body, which surrounds a bottom of the cup body.
Still another object of the present invention is to provide a rib-processing apparatus which can form a rib on a side wall of a cup body with reducing force to be added to the cup body and simplify structure thereof. Preferably, the rib-processing apparatus can form an outward projecting rib by an operation performed outside the cup body, and improve efficiency of process by omitting an operation of moving a model or the like in and out against the cup body.
In order to attain the above-mentioned object, there is provided a rib-processing apparatus for processing a rib on a side wall of a cup body so as to extend in a circumferential direction of the side wall comprising:
a male and a female model members disposed opposite to each other with putting the side wall therebetween, the male model member being provided on a portion facing the female model member with a projection to form a concave side of the rib, and the female model member being provided on a portion facing the male model member with a groove to form a convex side of the rib;
a radial direction driving device for moving at least one of the male and the female model members in a radial direction of the cup body so as to let the male and the female model members close to and away from each other;
a circumferential direction driving device for making a relative rotation between the cup body and at least one of the male and the female model members to change a position at which the side wall is nipped between the male and the female model members in the circumferential direction.
According to the above rib-processing apparatus, it is possible to form the rib gradually in the circumferential direction of the cup body, in accordance with the relative rotation between the cup body and the male or the female model member. Therefore, it is possible to reduce force added to the cup body during the process in comparison with the case in which the entire rib is formed at once.
The rib-processing apparatus may further comprise a cup holder capable of rotating about an axis thereof with supporting the cup body from an inside thereof, the cup holder may be provided with one of the male and the female model members, another one of the male and the female model members may be disposed on an outer periphery of the cup body, the radial direction driving device may move said another one of the male and the female model members in the radial direction of the cup body, and the circumferential direction driving device may rotate the cup holder.
One of the male and the female model members provided on the cup body may extend continuously over an entire periphery of the side wall of the cup body. In this case, it is possible to nip the side wall of the cup body by moving the male or the female model member provided outside the cup body in the radial direction, and under this condition, the rib can be formed by rotating the cup body. It is not necessary to drive the model member inside the cup body in the radial direction, and the model member outside the cup body may be driven only in the radial direction. Therefore, it is possible to simplify the structure of the apparatus.
A roller rotatable about an axis parallel to an axis of the cup body may be provided as said another one of the male and the female model members disposed on the outer periphery of the cup body.
The rib-processing apparatus may further comprise a restraining device for preventing the cup body from rising up from the cup holder.
The male model member may be provided inside the cup body, and the female model member may be provided outside the cup body.
According to still another aspect of the present invention, there is provided a rib-processing apparatus for processing a rib on a side wall of a cup body so as to extend in a circumferential direction of the side wall comprising:
a cup holder capable of rotating about an axis of the cup body with holding the cup body from an inside thereof;
a rotary drive Mechanism for rotating the cup holder; and
a press mechanism which is provided on one side of the cup holder and which has a press roller rotatable about an axis parallel to the axis of the cup body and a driving power source for moving the press roller reciprocally in a radial direction of the cup body,
wherein one of a groove for forming a convex side of the rib and a projection for forming a concave side of the rib is provided on an outer periphery of the press roller, and another one of the groove and the projection is provided on the cup holder so as to accord a position thereof in a direction parallel to the axis of the cup holder with a position of said one of the groove and the projection provided on the press roller.
In this apparatus, the rib is formed on the side wall of the cup body gradually in the circumferential direction thereof by the steps of holding the cup body from the inside thereof by the cup holder, pressing the press roller on the side wall to nip the side wall between the groove of the press roller and the projection of the cup holder, and rotating the cup holder together with the cup body held thereon. Therefore, it is possible to reduce force added to the cup body during the process in comparison with the case in which the entire rib is formed at once. Since no member in the cup body is driven in the radial direction of the cup body and the press roller is only driven in the radial direction, it is possible to simplify the structure of the apparatus. Since the press roller can rotate about its axis, it is possible to reduce friction between the roller and the side wall of the cup body.
The rib-processing apparatus may further comprise a conveyor for conveying the cup holder through a plurality of processes, and the rotary driving mechanism and the press mechanism may be provided intermediate positions of a conveying path of the conveyor.
According to still another aspect of the present invention, there is provided a process for forming a rib on a side wall of a cup body so as to extend in a circumferential direction of the cup body, comprising by the steps of:
nipping one part of the side wail of the cup body by a male and a female model members, the male model member being provided on a portion facing the female model member with a projection to form a concave side of the rib, and the female model member being provided on a portion facing the male model member with a groove to form a convex side of the rib; and
making a relative rotation between the cup body and at least one of the male and the female model members to change a position, at which the side wall is nipped between the male and the female model members in the circumferential direction of the side wall.
In this process, the rib is formed on the side wall of the cup body gradually in the circumferential direction thereof in the same manner as is mentioned above. Therefore, it is possible to reduce force added to the cup body during the process in comparison with the case in which the entire rib is formed at once.
In the above process, the cup body may be held from an inside thereof by an cup holder capable of rotating about an axis of the cup body, the cup holder may be provided with one of the male and the female model members, another one of the male and the female model members may be pressed on a side wall from an outside thereof to nip the side wall between the male and the female model members, and under this condition, the cup holder may be rotated.
A bottom of the cup body may be pressed down to the cup holder when the side wall is nipped by the male and the female model members.
Still further objects, features and other aspect of the present invention will be understood form the following detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.
The preferred embodiments of the present invention will be described below more in detail with reference to the attached drawings.
The heat-insulating container 1 of the present invention is composed of a cup body 2 made of paper, which has at the upper portion of the side wall 2a thereof an outward curled portion 2c and at the middle portion of the side wall 2a horizontal ribs 2d, 2d, and is provided with a bottom 2b, as shown in
The horizontal ribs 2d, 2d, which are formed on the side wall 2a of the cup body 2 so as to project outward have functions of improving the strength of the cup body 2 and forming a space for heat-insulation. A single horizontal rib or three or more horizontal ribs may be formed. The position of the horizontal ribs 2d, 2d may be determined taking into consideration the balance of strength of the cup body 2. It is however preferable to form one of the horizontal ribs 2d, 2d at the position, by which the formed rib 2d can also serve as the Peter line X, i.e., the line indicating an appropriate level of boiled water to be poured into the cup body 2, as shown in
In the heat-insulating container 1 of the present invention as shown in
In the heat-insulating container 1 of the present invention, the horizontal distance of the heat-insulating space increases gradually toward the bottom of the container 1 so that the sufficient heat-insulating property can be obtained between the intermediate portion of the container 1 and the bottom thereof. The portion in the vicinity of the outward curled portion 2c at the top end of the container 1 has however a decreased heat-insulating property. In order to prevent decrease in the heat-insulating property at the top portion of the container 1, there can be provided the other embodiment of the heat-insulating container 1 of the present invention as shown in
With respect to instant dried foods to be received in the heat-insulating containers 1 of the present invention as shown in
Each of the horizontal ribs 2d, 2d formed at the middle portion of the cup body extends continuously over the entire periphery of the side wall 2a as shown in
If the ribs 2d, 2d continuously formed and the ribs 2d, 2d intermittently formed are identical with each other in its number, the latter permits to expand the heat-insulating space and to cause the lower and upper heat-insulating spaces to communicate with each other so that the heated air can easily move over the entire zone of the 3heat-insulating space to maintain a uniform temperature distribution, resulting in improvement in the heat-insulating property, although the latter is slightly inferior to the latter in function of preventing warp of the side wall 3b of the sleeve 3.
When each of the horizontal ribs 2d, 2d is formed intermittently in the circumferential direction of the side wall 2a in this manner to form notches 8, it is preferable to divide the horizontal rib 2d or 2d into four to eight parts in the circumferential direction of the side wall 2a, and to maintain the ratio of the total length of the notches 8 to the entire periphery of up to 30 percent.
The horizontal rib 2d formed on the cup body 2 preferably has a sharp-pointed shape as shown in
Therefore, the horizontal rib 2d most preferably has a cross-section as shown in
In the formation of the heat-insulating container 1 of the present invention, the horizontal ribs 2d, 2d may be brought into contact with the side wall 3b of the sleeve 3 as shown in
When the horizontal ribs 2d, 2d are not brought into contact with the side wall 3b of the sleeve 3, the temperature of the outer surface of the heat-insulating container 1 is so low that the heat-insulating container 1 can be held with a hand, even after the completion of the process for soaking an instant dried food in boiled water poured into the container, although a slight warp of the side wall 3b of the sleeve 3 may be caused. The reason therefor is that the non-contacting condition of the rib 2d with the side wall 3b causes the heat-insulating space to be expanded, and the up-and-down circulation of air easily occurs between the both side walls 2a, 3b, thus permitting a uniform dispersion of heat.
The heat-insulating container 1 of the present invention has a capacity of 200 to 500 cc. When the paper cup body 2 having the capacity within the above-mentioned range is formed by means of the conventional paper cup forming machine, it is preferable to use a sheet of paper having a basic weight within the range of from 160 g/m2 to 300 g/m2. In general, the inner surface of the sheet of paper for the cup body is coated with the thermoplastic resin in an amount of 20 to 80 μm. The inner surface of the sheet of paper is coated for example with a polyolefin resin such as a low density polyethylene resin, a medium density polyethylene resin, a high density polyethylene resin, a linear low density polyethylene resin, or the like with the use of an extrusion coating method.
The resultant thermoplastic resin layer has functions of improving the cup formability, ensuring the sealing property of a cover (not shown) heat-sealed by means of a heat-sealing method and providing good formability of the horizontal rib 2d, in addition to the function of protecting the contents received in the container.
With respect to the sheet of paper used for the sleeve 3, there are required the good printing property as well as the formability of the curled portion. It is preferable for the sleeve 3 to use a sheet of coated fiberboard having a basic weight within the range of from 230 g/m2 to 350 g/m2 or a sheet of cardboard having a basic weight within the range of from 160 g/m2 to 250 g/m2.
With the basis weight of under the lower limit mentioned above, the rigidity of the sleeve 3 may remarkably be decreased, and a serious warp of the sleeve 3 may easily occur at an high temperature, thus leading to a poor heat-insulating property. With the basis weight of over the upper limit mentioned above, the forming property of the inward curled portion 3a may be deteriorated and the cost of material used for the sleeve 3 may be increased, thus causing unfavorable problems, although the rigidity of the sleeve 3 is improved.
When the material used for the sleeve 3 is subjected to a resin coating process or a resin impregnating process, it is possible to improve the rigidity, the proof compressive property, the proof collapsing property and the like so as to protect the contents received in the container from an external force applied to thereto during distribution of the container.
The heat-insulating container, which has not only a stable heat-insulating property over its entirety, but also a sufficient rigidity to prevent the occurrence of warp of the container permits to improve safety and reliability required for an eating container, which is to be filled with boiled water to make an instant dried food eatable received in the container, and is to be held with a hand in order to eat it. Such properties are considered as important factors especially for aged persons, physically handicapped persons and children, as well as essential factors required for barrier-free goods.
The heat-insulating container of the present invention is made of paper so as to be disposed easily without being subjected to segregated disposal. It is easy to decrease the volume of the container in the light of disposal thereof, due to the fact that the container has such an appropriate rigidity that a hand can easily collapse it. The container of the present invention has an excellent disposability and a smaller adverse influence on environment in comparison with the other conventional heat-insulating container using foamed plastic as the heat-insulating material.
In addition, no uneven portion is formed on the side wall of the heat-insulating container 1 of the present invention and in other words, the side wall has the smooth outer surface. The inward curled portion 3a of the sleeve 3 is located at the bottom of the container so as to reveal a moderate curvature. The heat-insulating container 1 therefore has an elaborated design as a cup-shaped container, The gap formed between the side wall 2a of the cup body 2 and the side wall 3b of the sleeve 3 at the bottom of the container is sealed with the inward curled portion 3a so as to prevent dust or foreign matters from entering the space formed between the side walls 2a, 3b and to prevent the absorption of liquid on the end of the sheet of paper for forming the cup body 2. The heat-insulating container 1 of the present invention can be kept hygienic.
The sleeve 3 has a high degree of freedom in printing, and can therefore be subjected without specific restriction not only to the conventional printing process such as an offset printing, a gravure printing, a flexo graphic printing or the like, but also to the conventional process such as a overcoating process, a stamping process, an embossing process or the like, which are to be carried out after the completion of the printing process. As a result, such printing and processing properties can provide an excellent aesthetic effect in cooperation with the smooth outer surface of the container mentioned above.
It is further possible to form an overcoating layer of varnish on the side wall of the sleeve 3 and/or the surface of the inward curled portion 3a so as to prevent these portion from being wetted and becoming unclean.
Next, the description will be given below of a method for manufacturing the heat-insulating container 1 of the present invention.
First, a tubular member having a frustoconical shape is formed from a fan-shaped blank sheet of paper with the use of a cup forming machine. A bottom plate 2 is then supplied to the cup forming machine to carry out a seaming treatment so as to form the bottom. Then, an outward curled portion is formed at, the upper opening end of the tubular member and horizontal ribs 2d, 2d are formed, thus preparing a cup body 2.
The step for forming the horizontal ribs 2d, 2d may be carried out under the on-line condition of the cup forming machine or under the off-line condition thereof. More specifically, it is possible to form the horizontal rib 2d projecting outward from the cup body 2 by putting the formed cup body 2 having no ribs 4 into a forming cavity of a mold, which has grooves corresponding to the horizontal ribs 2d, 2d and strongly pressing the inner surface of the cup body 2 through a roller in the vicinity of the grooves, which is urged by means of an expander, while rotating the cup body 2.
In this case, when the roller is pressed on the entire periphery of the cup body 2, there can be formed the horizontal ribs 2d, 2d as shown in
The cup body 2 is pulled out from the forming cavity of the mold after the completion of formation of the horizontal ribs 2d, 2d. The horizontal rib 2d having a gentle curved upper portion as shown in
The horizontal rib 2d can be formed by means of a drawing process using made and female dies.
A sleeve 3 can be prepared on the other hand by printing a pattern, a logotype, characters or the like on a cut sheet or a rolled sheet of cardboard or coated fiberboard, punching the sheet to form a fan-shaped blank sheet, applying an adhesive joining process to the thus formed fan-shaped blank sheet with the use of the cup forming machine to form a formed body having an inverse-frustoconical shape, and curling the under peripheral edge of the thus formed body to form the inward curled portion.
The cup body 2 is put into the sleeve 3 and the upper contacting portions of the cup body 2 and the sleeve 3 and the lower contacting portions thereof are joined with each other by means of an adhesive agent, thus completing the preparation of the heat-insulating container 1 of the present invention. The joining step applied to the lower contacting portions of the cup body 2 and the sleeve 3 may be omitted as the occasion demands.
The thus prepared heat-insulating container 1 of the present invention has a stacking property so that a plurality of containers 30 can be supplied under a stacked condition to a user.
An example of the heat-insulating container of the present invention will be described below.
The sample of the heat-insulating container of the present invention was prepared in accordance with the following manner:
The respective upper portions of the cup body 2 and the sleeve 3 and the respective lower portions thereof are joined with each other by means of an acrylic emulsion type adhesive agent so that the cup body 2 and the sleeve 3 are combined integrally with each other.
There was prepared, as a comparative sample, a heat-insulating container 50 as shown in
Boiled water having a temperature of 95° C. was poured into each samples in an amount of 240 cc so that the level of boiled water reached the Peter line. After the lapse of time of 2 or 3 minutes, the middle portion of each of the samples was held by a hand to make a tactile inspection of temperature on the outer surface of each of the samples. The above-mentioned tactile inspection revealed the fact that the sample of the present invention was more excellent in heat-insulating property than the comparative sample and the temperature of the outer surface of the former was lower than that of the latter, thus making it possible to keep holding the sample of the former without perceiving the high temperature.
Such a tactile inspection was made under two conditions, i.e., the firm holding condition and the soft holding condition of the sample. In the sample of the present invention, perception of heat under the firm holding condition was substantially identical with that under the soft holding condition. In the comparative sample, heat was more seriously perceived under the firm holding condition rather than the soft holding condition.
Next, the embodiment of the apparatus for producing the heat-insulating container will be described below in detail.
The sleeve 3 is provided for improving the heat-insulating property of the container 1. As is clearly illustrated in
Next, an apparatus for producing the container 1 will be explained with reference to
The sleeve forming section 20 and the assembling section 30 are provided with turn tables 21, 31, respectively. Each of the tables 21, 31 is supported by a main body 11 of the producing apparatus 10 so as to be turnable about a vertical axis. The main body 11 is a basic portion to which various elements of the producing apparatus 10 are attached. The body 11 is constructed by assembling steel products or the like, and is installed horizontally on a floor FL in a factory or the like. The main body 11 is provided at the lower portion thereof with a motor 12 as a drive power source (refer to
In the transmission mechanism 22, the rotation of the sprocket 14 is input into a motion conversion mechanism (not shown) housed in a gear box 22b, and converted into the rotation of the drive shaft 21a of the turn table 21 (refer to
On the outer periphery of the turn table 21, there are provided eight mandrels 23 . . . 23 as sleeve holders so as to leave equal angles (45 degrees) therebetween in a circumferential direction of the table 21. Each mandrel 23 is formed with a body 23a having a tapered outer circumferential surface in which a diameter decreases as it goes toward the tip thereof. The axial direction of the body 23a of each mandrel 23 accords with the radial direction of the turn table 21. On the outer periphery of the turn table 31, there are provided eight cup holders 33 . . . 33 so as to leave equal angles (45 degrees) therebetween in a circumferential direction of the table 31. Each cup holder 33 supports the cup body 2 in a reversed posture in the vertical direction. The details thereof will be explained later.
During the production of the container 1, the turn tables 21, 31 are intermittently driven at intervals of 45 degrees, and this drive angle is equal to the angle intervals at which the mandrels 23 . . . 23 and the cup holders 33 . . . 33 are arranged. Therefore, each mandrel 23 stops at eight stations A1 to A8 defined on the outer periphery of the turn table 21 step by step, and each cup holder 33 stops at eight stations B1 to B8 provided on the outer periphery of the turn table 31 step by step. Namely, the mandrel 23 circulates along its circulation path defined on the outer periphery of the table 21, and the cup holder 33 circulates along its circulation path defined on the outer periphery of the table 31. Thus, a combination of the motor 12, the sprocket 13, the chan 14, the sprockets 15, 16, the table 21, the transmission mechanism 22, the table 31 and the transmission mechanism 32. functions as a driving device for the sleeve holder and the cup holder.
As shown in
As shown in
As is clearly illustrated in
When the blank drawing member 113 is driven upward, the suckers 115 are brought into contact with the blank 3′ disposed at the lower end of the blank holder 111, and at the same time, air is sucked from the sticking surface of each sucker 115 to thereby stick the suckers 115 to the blank 3′. After this, the blank drawing member 113 is driven downward, so that the blank 3′ which has stuck to the suckers 115 moves over the enlarged portions 112a and is drawn out below the blank holder 111. Then the blank drawing member 113 is further driven downward, so that both end portions of the blank 3′ engage with the rails 101, 101, and at the same time, the air suction from the suckers 115 is suspended to thereby release the suckers 115 from the blank 3′.
As shown in
As shown in
The second chain conveyor 140 is equipped with sprockets 143, 143 attached to the sprocket shaft 142 so as to be rotatable with the shaft 142. The sprocket shaft 142 is connected with the drive shaft 21a of the turn table 21 (refer to
As,shown in
At the end portion of a piston rod 205a of each pneumatic cylinder 205, there is provided an attachment 206 pivotable around a pin 207. The attachment 206 is connected with the support member 201 so as to be pivotable with a pin 208 as a fulcrum and is provided with a blank curling block 210. The block 210 is formed with a concave surface 210a curving along the outer circumferential surface of the mandrel 23.
The attachment 206 can pivot within a predetermined range around the pin 207 in accordance with a reciprocal motion of the piston rod 205a of the pneumatic cylinder 205. When the blank 3′ is just delivered to the station A1 by the blank-supplying device 100, each piston rod 205a is held in its contracted position as indicated by imaginary lines in
After finishing the curling process of the blank 3′, the attachments 206 are driven by the pneumatic cylinders 205 to the position indicated by the imaginary lines in
The joint line 3d of the blank 3′ curled up on the mandrel 23 is pressed onto the mandrel 23 and heated by the main-sealing device 220. As shown in
The movable portion 22 la of the pneumatic cylinder 221 can be driven in the vertical direction. The press block 222 inclines along the outer circumferential surface of the mandrel 23, and a length of the block 222 is substantially equal to that of the mandrel 23. The press block 222 is equipped with a heater (not shown) therein, and is heated to a proper temperature, for example 100° C., to hasten adhesion between both ends 3c, 3c of the blank 3′.
When the curling device 200 curls up the blank 3′ on the mandrel 23 in the station A1, the movable portion 221a is withdrawn upward, and the press block 222 is held at a position apart from the mandrel 23. After the curling device 200 curls up the blank 3′ with the blank curling blocks 210 on the mandrel 23, the movable portion 221a of the pneumatic cylinder 221 moves downward and the heated press block 222 is pressed onto the joint line 3d of the blank 3′ before the blank curling blocks 210 move away from the mandrel 23. Therefore, the joint line 3d is pressed and heated to thereby hasten adhesion thereof.
The heating and pressing by the press block 222 is continued until the mandrel 23 reaches the station A7. After the mandrel 23 reaches the station A7, the movable portion 221a of the pneumatic cylinder 221 moves upward and the press block 222 moves away from the mandrel 23.
The blank 3′, the joint line 3d of which is pressed by the main-sealing device 200, is fed from the station A1 to the station A2 in accordance with the turning of the table 21, and is carried in the assist-sealing device 240 (refer to
The assist-sealing device 240 is provided to press and heat one end portion of the joint line 3d projecting from the mandrel 23 to thereby hasten the adhesion thereof. Namely, in the producing apparatus 10 of this embodiment, the body 23a of the mandrel 23 is shorter than the blank 3′ curled up thereon. The reason of such arrangement is to curl the blank 3′ and form the curled portion 3a (refer to
As shown in
As shown in
The blank 3′ processed by the assist-sealing device 240 is carried in the end curling device 260 of the station A4 in accordance with the next turn of the table 21, and is carried in the end curling device 260 of the station A5 in accordance with the further turn of the table 21. Each device 260 is provided for forming the curled portion 3a of the sleeve 3 (refer to
As shown in
On an output shaft 265a of the motor 265, there is mounted an adapter 267 so as to rotate therewith, and a disk-like die 268 is detachably mounted on the end surface of the adapter 267 by using bolts 269 . . . 269. The die 268 is coaxial with the output shaft 265a, and on the end surface thereof is formed a groove 268a for forming the curled portion 3a so as to encircle the die 268 around its axis. These die 268 and the output shaft 265a are also coaxial with the mandrel 23.
The die 268 moves in a direction of the center axis of the mandrel 23 in accordance with the motion of the piston rod 262a of the pneumatic cylinder 262. When the table 21 turns, the piston rod 262a of the pneumatic cylinder 262 is retracted and the die 268 is held in a position away from the projecting portion 3e of the blank 3′ as shown in
When the table 21 stops, the piston rod 262a of the pneumatic cylinder 262 moves toward the mandrel 23, and the die 268 contacts the projecting portion 3e of the blank 3′ with rotating about its axis. At this time, the projecting portion 3e is inserted into the groove 268a of the die 268 and is curled inward along the profile of the groove 268a. After the die 268 contacts the blank 3′ for a predetermined time, the piston rod 262a of the pneumatic cylinder 262 goes back and the die 268 returns to the position illustrated in
Note that the curled portion 3a is formed halfway in the station A4 and fully formed in the station A5. The reason why the curled portion 3d is formed in two steps is to form the large curled portion 3d without processing forcibly. The moving amounts of the dies 268 and the profiles of the grooves 268a in the stations A4, A5 are different from each other.
The sleeve 3 is thus prepared through the above mentioned processing in the stations A1 to A6. The prepared sleeve 3 is transferred to the assembling section 30 by the sleeve-ejecting device 280 in the station A7.
As shown in
While the table 21 is turning, the movable portion 284a of the pneumatic cylinder 284 is withdrawn downward, and the roller 286 moves away from the mandrel 23. The output shaft 285a of the motor 285 rotates in a counter-clockwise direction in
On the base plate 301, there are provided six pulleys 305a, 305b, . . . 305. A motor 306 is mounted on the motor base 302 and the pulley 305a is fitted on an output shaft 306a of the motor 306 so as to be rotatable therewith. The other pulleys 305b . . . 305f are fitted to the pulley shafts 307 . . . 307 so as to be rotatable therewith, and each pulley shaft 307 is rotatably supported by the base plate 301. Between the pulleys 305a to 305f, there is stretched a belt 308 to rotate the pulleys 305a to 305f together in accordance with the rotation of the output shaft 306a of the motor 306. The two pulleys 305b and 305f, each of which adjoins the pulley 305a, and the pulley 305d which is disposed on an opposite side of the through hole 33 to the pulley 305a are connected with rollers 309 . . . 309 through the pulley shafts 307, respectively. Each roller 309 is formed with a helical groove 309a on its outer circumferential surface.
The roller 309 slightly protrudes inward from the outer circumference of the hole 303 in a radial direction thereof and the plurality of the cup bodies 2 stocked between the rods 304 are supported from the lower side by the rollers 309. When the output shaft 306a of the motor 306 is driven in a predetermined direction, the curled portion 2c of the cup body 2 disposed at the lowest position within all of the cup bodies 2 . . . 2 engages with the grooves 309a of the rollers 309 and is fed downward in accordance with the rotations of the rollers 309. Therefore, one of the cup bodies 2 is ejected from the space between the rods 304 and is put on the cup holder 33. Every time the table 31 turns 45 degrees, the rollers 309 are repeatedly driven a predetermined angle to supply the cup body 2 to the cup holder 33 carried in the station B1.
The cup body 2 put on the cup holder 33 moves to the rib-processing device 320 in the station B2 in accordance with the next turn of the table 31 and further moves to the rib-processing device 320 in the station B3 in accordance with the further turn of the table 31.
The model members 45, 46 are provided to form the ribs 2f, 2e, and are formed with flanges 45a, 46a on their outer peripheries. Each of the flanges 45a, 46a functions as an abutment portion and is coaxial with the rotary cylinder 43, and each outer peripheral portion thereof is formed into a round shape in its section. The cap 47 is formed on its upper end with a bottom support portion 47a to support the bottom 2b of the cup body 2 from the inside thereof. When the bottom 2b is brought into contact with the bottom support portion 47a, the flanges 45a, 46a almost contact the inner surface of the side wall 2a at positions to which the ribs 2f, 2e are formed, respectively. The outer periphery of each of the flanges 45a, 46a thus functions as an abutment portion. The thickness of each of the flanges 45a, 46a, that is, the dimension in the vertical direction in
As shown in
The rotary drive mechanism 321 comprises four rods 322 . . . 322 mounted on the main body 11 of the apparatus 10, a motor base 323 mounted on the upper ends of the rods 322, and a motor 324 mounted on the motor base 323. The motor 324 is provided with an output shaft 324a projecting upward, and a drive wheel 325 as a rotation output portion is mounted on the shaft 324a. When the cup holder 33 is carried in the station B2 or B3 in accordance with the turn of the table 31, the drive wheel 325 contacts the driven-wheel 43a of the cup holder 33 to allow the rotary cylinder 43 to be rotated in accordance with the rotation of the output shaft 324a of the motor 342. When the table 31 turns, the driven wheel 43a moves away from the drive wheel 325 to thereby break the rotation transmission between the wheels 325, 43a. When the table 31 stops after turning predetermined angle, i.e. 45 degrees, the driven wheel 43a of the next cup holder 33 contacts the drive wheel 325 to thereby allow the rotation transmission therebetween.
As minutely shown in
The bracket 332 is mounted on the rods 331 in such a manner that the vertical position thereof can be adjusted along the rods 331. In the station B2, the position of the bracket 332 is adjusted so as to locate the groove 335a of the press roller 335 and the flange 45a on the same position in the vertical direction, and in the station B3, the position of the bracket 332 is adjusted so as to locate the groove 335a of the press roller 335 and the flange 46a on the same position in the vertical direction.
The restraining mechanism 336 comprises a bracket 337 mounted on the upper ends of the rods 331, a pneumatic cylinder as a drive power source mounted on the end portion of the bracket 337 so as to be oriented downward, and a restrain plate 339 rotatably connected to a piston rod 338a of the pneumatic cylinder 338 through a bearing 339. When the piston rod 338a of the pneumatic cylinder 338 moves downward, the restrain plate 339 contacts the bottom 2b of the cup body 2 to thereby prevent the lift-up of the cup body 2 during the process of forming the ribs 2f, 2e.
The operation of the rib-processing device 320 in the station B2 is as follows. When the table 31 stops after turning a predetermined angle and the cup body 2 is supplied to the station B2, the drive wheel 325 and the wheel 43a of the cup holder 33 contact each other, so that the rotary cylinder 43 of the holder 33 and the cup body 2 are rotatably driven around the axis of the holder 33. Under this condition, the pneumatic cylinder 338 of the restraining mechanism 336 is activated to bring the restrain plate 339 into contact with the bottom 2b of the cup body 2, and at the same time, the piston rod 333a is protruded to move the press roller 335 toward the side wall 2a as indicated by an arrow in
After the press roller 335 relatively revolves around the cup body 2 one time or more, the piston rod 333a is retracted to detach the press roller 335 from the side wall 2a as shown in
The cup body 2 on which the rib 2b is formed is fed to the station B3 in accordance with the next turn of the table 31. In the station B3, the press mechanism 330 and the restraining mechanism 336 are driven to form the rib 2e on the side wall 2a in the same manner as mentioned above. The operations of the press roller 335 and the flange 46a against the side wall 2a are similar to the illustrations of
The cup body 2 on which the rib 2e is formed is carried in the adhesive applying device 340 (refer to
As shown in
The cup body 2 on which the adhesive agent 4 is applied in the station B4 is fed to the sleeve-delivering device 360 provided in the station B5.
The index table 363 is provided on its outer periphery with four holding plates 366 . . . 366. Each holding plate 366 is formed with a through hole 366a to which the sleeve 3 is fitted. The axis of the hole 366a extends in the radial direction of the index table 363, and the hole 366a is tapered in such a manner that the diameter thereof gradually reduces toward the center of the index table 363.
Every time the index table 363 rotates 90 degrees, each holding plate 366 moves 90 degrees around the center of the index table 363, so that each holder 366 stops at positions C1 to C4 one by one. The positions C1 to C4 are arranged at the right hand side, the upper end, the left hand side and the lower side of the index table 363. At the position C1, the through hole 366a of the holding plate 366 is arranged so as to be coaxial with the mandrel 23 located in the station A7 of the sleeve forming section 20, and at the position C4, the hole 366a is arranged so as to be coaxial with the cup holder 33 in the station B5. Therefore, the sleeve 3 removed from the mandrel 23 by the roller 286 (refer to
As is clear from
The cup body 2 surrounded with the sleeve 3 is fed to the sleeve-fitting device 380 in the station B6 in accordance with the next turn of the table 31.
As shown in detail in
While the table 21 is turning, the jig body 386 is kept in a position above the pneumatic cylinder 383 as illustrated in
When the jig 385 goes down to a predetermined position, the tapered portions 387a contact the inner surface of the side wall 2a at the lower end thereof (upper end in
The fitting jig 385 lowered to a position illustrated in
The sleeve 3 and the cup body 2 are thus assembled through the above processing, and the production of the container 1 is finished. The prepared, container 1 is fed to the station B7 in accordance with the next turn of the table 31, and is fed to the station B8 in accordance with the further turn thereof. As shown in
The present invention is not limited to the above embodiments, and various modifications can be applied. For example, the container 1 can be modified as shown in
In the above mentioned embodiment, no process is performed in each of the station A6 of the sleeve forming section 20 and the station B7 of the assembling section 30. However, it is possible to perform proper process in each of the stations A6 and B7 as necessary. For example, it is preferable to check the container 1 at the station B7, and to eject a defective container from a non-defective container at the station B8. The number of the stations can be changed. For example, if the curled portion 3a of the sleeve 3 can be completely formed in one step, one of the devices 260 can be omitted and the number of the stations in the sleeve forming section 20 can be reduced. If the ribs 2e, 2f are formed in the common station, it is possible to reduce the number of the stations in the assembling section 30. On the contrary, it is possible to increase the number of the stations to add another process necessary for producing the container 1. As long as the supply of the sleeve 3 to the sleeve-delivering device 360 and the supply of the cup body 2 thereto are synchronized with each other, it is not always necessary to accord indexing angles i.e. driving angles of the tables 21, 31 with each other.
In the above embodiment, the turn table 21 functions as the conveyor for the sleeve, and the sleeve forming section 20 functions as the sleeve forming apparatus. The conveyor for the sleeve is not limited to the turn table, and may be changed to various structures, which can circulate the mandrel along a certain path. The sleeve forming apparatus is not limited to the embodiment integrated with the assembling apparatus. The sleeve forming section 20 and the assembling section 30 are constructed as apparatuses independent of each other. If the curled portion 3a is not necessary for the sleeve 3, it is possible to extend the body 23a of the mandrel 23 to a length equal to or greater than the length of the sleeve 3, thereby omitting the assist seal device 240. The main-sealing device 220 and the assist-sealing device 240 may be integrated together, such as shown in
In the above embodiment, the turn table 31 functions as the conveyor for the cup body, the assembling section 30 functions as the assembling apparatus, and the rotary drive mechanism 321 functions as the holder driving device. The conveyor for the cup body is not limited to the turn table, and may be changed to various structures, which can circulate the cup holder along a certain path. The assembling apparatus is not limited to the above embodiment integrated with the sleeve forming apparatus. Various processing besides the processing of the ribs 2e, 2f may be performed with using the rotation of the cup body given by the holder driving device.
If the groove 335a is formed on the outer periphery of the flange 45a or 46a, and a projection complementary to the groove 335a is formed on the outer circumferential surface of the roller 335, it is possible to project the rib 2f or 2e inward as shown in
The rib-processing device of the present invention can be used to form various containers with the rib. The rib formed by the device of the present invention is not limited to that encircling the container, a rib partially extending along the circumferential direction thereof as shown in
The heat-insulating container according to the present invention can be used as a container for taking an instant dried food or the like to the market. The producing apparatus, the sleeve-forming apparatus, the assembling apparatus, the rib-processing apparatus and the process of the present invention can be used for preparing various containers.
| Number | Date | Country | Kind |
|---|---|---|---|
| 9-245966 | Aug 1997 | JP | national |
| 10-011999 | Jan 1998 | JP | national |
| 10-109804 | Apr 1998 | JP | national |
| 10-126491 | May 1998 | JP | national |
| 10-126492 | May 1998 | JP | national |
| 10/126493 | May 1998 | JP | national |
This application is a division of U.S. Ser. No. 09/269,594 filed Mar. 29, 1999 now U.S. Pat. No. 6,663,926, which U.S. application is hereby incorporated herein by reference.
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| Number | Date | Country |
|---|---|---|
| 0 695 692 | Feb 1996 | EP |
| 0 695 692 | Jul 1996 | EP |
| 1394731 | Jul 1963 | FR |
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| WO 9707030 | Feb 1997 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20040226948 A1 | Nov 2004 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 09269594 | US | |
| Child | 10694140 | US |
