Patent Application
20150314948
The present invention pertains to a display and distribution package for eggs.
Packages for packing and transporting eggs are known in a variety of forms. Traditionally, such packages have comprised a bottom part provided with suitably shaped compartments for accommodation of the eggs, and an upper part forming a cover over the bottom part for accommodating the upper portions of the eggs housed within the package and for closing the package. Often, the upper part is connected to the lower part by means of a suitable hinge portion, although packages comprising separate bottom and upper parts have also been used. In those packages that comprise a hingedly connected bottom and cover part, the vertical front side of the bottom part is often provided with a flexible flap comprising a number of protrusions for engagement with correspondingly located and shaped holes in the cover part, thereby locking the bottom and cover parts together in the closed state of the package. A package of this kind suffers from various disadvantages. In the closed position, the front face of the package will be subdivided into an upper part and a lower part and as the lower part is typically formed to be able to accommodate and support the articles contained within the package, it is only the upper part which can be given a planar shape that permits the application of text and pictures describing the contents of the package. In use in a store, such packages will often be stacked in a sales rack, and hence it is only the vertical front side, which is visible to the customer.
EP 1 373 100 discloses a display and distribution packaging unit for fragile articles, especially for eggs, comprising a bottom part which at least partially matches the outer contours of the eggs housed within the unit and a cover part comprising planar top- and side surfaces for the provision of graphical information about the contents of the unit, where portions of the end surfaces of the cover part are shaped to reflect the shape of the eggs housed within the display and distribution package. A problem with this egg package is that the closing and locking mechanism is provided by a traditional locking flap having a protrusion, which extends through an aperture in the front side of the cover part, thus, reducing the available place for a label.
Thus, in the prior art egg packages it has only been possible to place a label on the top surface of the cover part, which often is not visible, when the egg packages are stacked in a sales rack. There has thus always been a conflict between having a large surface for the placement of a label and at the same time having a reliable closing and locking mechanism, i.e. a large area for a label without compromising the reliability of the locking mechanism. Additionally, a closure flap as known from EP 1 373 100 is an element that increases the cost of manufacture and transport of the egg packages.
It is thus an object of the present invention to provide an egg package, which due to its form provides a clear, visible information about the contents of the unit and at the same time offers good opportunities for providing graphical and/or pictorial information on large surfaces of the unit.
It is a further object of the present invention to provide an egg package, which may be reliably closed and locked in a substantially error free manner by a machine.
It is a further object of the invention to provide a packaging unit which can be produced as one integrated unit for instance by suction moulding.
It is therefore a further object of the present invention to provide an egg package—without the provision of a traditional locking flap—which may be reliably closed and locked in a substantially error free manner by a machine.
According to the present invention, the above-mentioned and other objects are fulfilled by a first aspect pertaining to a method of manufacturing an egg package by suction moulding of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a second aspect pertaining to an egg package formed by suction moulding of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a third aspect pertaining to a package for eggs, said package being formed of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a fourth aspect pertaining to a method of manufacturing an egg package by suction moulding of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a fifth aspect pertaining to an egg package formed by suction moulding of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a sixth aspect pertaining to a package for eggs, said package being formed of a fibrous material, the package comprising:
According to the present invention, the above-mentioned and other objects are fulfilled by a seventh aspect pertaining to an egg package formed of a fibrous material, the egg package comprising the following main parts:
The packaging unit according to the present invention thus comprises a bottom part provided with one or more compartments for accommodating and supporting the eggs in the packaging unit and a cover part, where one or more portions of the cover part are shaped such that they reflect the shape of the eggs contained within the packaging unit, thereby making the shape of the eggs contained within the unit visible from outside. By shaping portions of the cover part in this manner the contents of the packaging unit becomes more apparent than in prior art packaging units, not only when the packaging unit is seen from the side—where both the bottom part and the cover part can be seen—but also when seen from above, in which case the bottom part may be more or less invisible to the viewer.
It should be noted that throughout this description and the appended claims the expression: partial ovoid portions should be understood as a portion having a shape that provides a viewer with a clear association of the form of an egg without necessarily having a form exactly corresponding to an egg. Thus, surfaces or sub-surfaces of a number of different solids of revolution, for instance of an ellipsoid, may reflect the shape of an egg within this context.
Moreover, a reliable and stable locking function that may be facilitated by simple mechanical closing means is achieved, for example provided by packing machinery without the risk of damaging the fragile eggs that are placed in the package. This is due to the fact that the egg package according to the above embodiment may be closed and locked in one operation by pivoting the cover part in relation to the hinge. This pivoting of the cover part may thus be facilitated by only one mechanical operation by the packing machinery. Typically, packaging machinery is adapted for handling a tremendous number of packages over a short time span. It is therefore an important advantage of the present embodiment that the package can be closed and locked in an error free and reliable manner by the packaging machinery. Since, the nose(s) are projecting downwardly and outwardly, the cooperating aperture(s) on the cover part can slide over the nose(s) during closing of the egg package and engage it in a locking manner, because the nose(s) will simply work as a hook that hooks onto a lower edge of the aperture. This way a simple—yet effective way—of providing reliable locking means on the cover part is achieved, which furthermore is easy to manufacture. Preferably, there is a number of such apertures that corresponds to the number of noses.
Since, the noses do not extend beyond the front surface of the cover part when the cover part is in its closed position, it is possible to equip the cover part with a label covering the top surface and the entire front surface of the cover part.
Accordingly, it is seen that the claimed locking mechanism and the ovoid portions of the end surfaces provides the synergetic effect by which all technical locking features are hidden beneath the label, thus providing an egg package, which due to its form provides a clear, visible information about the contents of the unit and at the same time offers good opportunities for providing graphical and/or pictorial information on remaining surfaces of the cover part.
Additionally consumer investigations have shown that a label does not provide enough sales appeal. However, if in addition to labels the egg package is distinguished by its form as well it provides a greater appeal to towards the consumer. Egg packages have more or less looked the same during the last decades. Thus, by the provision of an egg package of the kind as described above, wherein a label is placed over the top surface of the cover part and a substantial part of the front surface of the cover part, and which is provided with the ovoid portions on the end surfaces of the cover part a very consumer appealing egg package is provided, because there are no disrupting features (e.g. the locking mechanism), which may interfere with the impression the package will give the consumer. This simplicity and “cleanness” of the egg package will furthermore make it more easily recognizable for a consumer.
According to an embodiment of the seventh aspect the label covers substantially the entire front surface of the cover part.
According to a preferred embodiment of the seventh aspect, the one or more apertures are formed in one or more recesses in the front surface of the cover part. Hereby is achieved a safer locking mechanism because a larger nose may be used, which at the same time does not extend through the front surface of the cover part.
According to an embodiment of the seventh aspect, the one or more recess in the front surface of the cover part extends from the upper part of the front surface of the cover part, adjacent to the top surface of the cover part, and down to approximately the middle of the front surface of the cover part. Hereby is achieved an enhanced reliability of the locking mechanism, because recesses placed in this way will provide an anti-bowing effect on the front surface of the cover part in a direction along the longitudinal extension of the recesses.
Preferably, the recesses comprise a bottom wall and two opposing sidewalls extending from the front surface of the cover part to the bottom wall.
According to a preferred embodiment of the seventh aspect, the partial ovoid portions in the cover part are about one quarter of a complete ovoid. This gives a distinct and clear information to a consumer that this particular package contain eggs.
In a preferred embodiment of the seventh aspect, the partial ovoid portions of the cover part continue in the corresponding egg-receiving compartments in the bottom part, the corresponding portions in the cover part and in the bottom part thereby matching a continuous portion of a surface of an egg. Providing not only the cover part with portions reflecting the shape of the eggs in the unit but also shaping the corresponding portions of the bottom part such that they reflect the shape of the eggs further enhances the visual information about the content of the unit. The individual portions of the cover part and the corresponding portions of the bottom part may in the closed state of the unit merge into a substantially continuous surface reflecting a relatively large portion of the surface of an egg.
According to an embodiment of the seventh aspect, the partial ovoid portions located at the end surfaces of the cover part together with the corresponding egg-receiving compartments in the bottom part constitutes not less than approximately 60% of the total surface of an egg. Hereby, the eggs are supported in a manner which reduces the risk of damages of the eggs caused by the accelerations experienced for instance during vibrations of the unit and if the unit is accidentally dropped. Specifically said compartments can also be formed to support the eggs at the bottom portion of the compartments.
Preferably, the surface structure of the partial ovoid portions has a different surface structure than the remaining portions of the cover part. By providing those portions of the cover part, which reflect the content of the unit, with a surface structure differing from the surface structure of the remaining portions of the cover part, the content of the packaging unit is made even more apparent as seen from outside, for instance for a customer in a store.
For example the surface structure of the partial ovoid portions is relatively smooth, while the surface structure of the remaining surfaces of the package are relatively coarse, or alternatively the surface structure of the partial ovoid portions is relatively coarse, while the surface structure of the remaining surfaces of the package are relatively smooth.
According to the present invention, the above-mentioned and other objects are fulfilled by an eight aspect pertaining to a method of producing an egg package by suction moulding of a fibrous material, the egg package comprising the following main parts:
An egg package formed by suction moulding of a fibrous material would possess some degree of stiffness in the bottom part, because the bottom part comprises the egg receiving compartments, whereas the cover part comprises larger substantially flat surfaces. These larger surfaces are less stiff and therefore also more prone to deformation during the manufacturing process, i.e. after they are removed from the mould and dried in the oven. These deformations are usually not large enough to cause problems in relation to the reliability of the traditional egg packages, which are equipped with a large locking flap. However, since the nose in the egg package manufactured according to the inventive method does not extend beyond the front surface of the cover part when the cover part is in its closed position, even very small deformations in the cover part may lead to an unreliable locking of the egg package. Since egg packages are machine handled at a tremendous speed in an egg packaging facility, the facilitation of a reliable and error free locking of them is of critical importance. Thus, by placing the retainment projection and co-operating aperture relative to each other during moulding of the egg package in a moulding form, such that the above mentioned deformations in the cover part during manufacture are compensated for, it is achieved that the egg package can be locked and closed in a substantially error free manner by the existing packaging machinery being used in handling prior art packages.
Hence, a reliable and stable locking function which may be facilitated by simple mechanical closing means is achieved, for example provided by packing machinery, without the risk of damaging the fragile eggs being placed in the package. This is due to the fact that the egg package according to the above embodiment may be closed and locked in one operation by pivoting the cover part in relation to the hinge. This pivoting of the cover part may thus be facilitated by the packaging machinery by only one mechanical operation. Typically, packaging machinery is adapted for handling a tremendous number of packages over a short time span. It is therefore an important advantage of the present embodiment that the package can be closed and locked in an error free and reliable manner by the packaging machinery. Since, the noses are projecting downwardly and outwardly, the cooperating apertures on the cover part can slide over the noses during closing of the egg package and engage them in a locking manner, because the noses will simply work as hooks that hook onto a lower edge of the aperture. This way a simple—yet effective way—of providing reliable locking means on the cover part is achieved and an easy manufacture of the egg package. The number of such apertures corresponds to the number of noses.
In an embodiment of the eight aspect, the method according to the invention further comprises the step of attaching a label to the top surface and front surface of the cover part with an adhesive. This label covers the apertures in the front side of the cover part, thereby giving it a more clean and appealing look. Since, the noses do not extend beyond the front surface of the cover part when the cover part is in its closed position, it is possible to equip the cover part with a label covering the top surface and the entire front surface of the cover part.
In a further embodiment of the eight aspect, the method comprises a step of after-pressing said egg package in order to provide an egg package with a more smooth surface.
In a further embodiment of the eight aspect, the method further comprises the step of forming a pillow post between each two neighboring egg receiving compartments, wherein at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part is higher than 7 mm as measured from the bottom of the neighboring egg receiving compartments. Hereby is achieved that the upwardly extending retainment projection extending from the front side of the bottom part has an increased rigidity. This increased stability of the upwardly extending retainment projection (extending from the front side of the bottom part at the same place as the at least 7 mm high pillow post) increases further the reliability of the locking function of the egg package, which—as mentioned before—is machine handled at a tremendous speed in an egg packaging facility, where it is of critical importance that it may be closed and locked by an automatic packaging machine in an error free manner in order to reduce the need for human intervention during the packaging of eggs.
In a further embodiment of the method according to the of the eight aspect, the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part has a height between 7 mm and 20 mm, preferably a height between 7 mm and 15 mm, as measured from the bottom of the neighboring egg receiving compartments. Hereby is achieved a sufficient tradeoff between the desired form stability and stiffness of the upwardly extending retainment projection and the height of the adjacent pillow post.
In a further embodiment of the eight aspect, the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part is higher than all the other pillow posts in said egg package. Hereby is achieved that the required form stability and stiffness of the upwardly extending retainment projection is achieved without having to increase the height of the other pillow posts and therefore without having to use extra fibrous material, e.g. pulp, in the production of said egg package.
In a further embodiment of the eight aspect, said egg package may comprise at least eight egg receiving compartments formed in two parallel rows, and at least three upwardly extending retainment projections, wherein the step of compensating for deformations of the cover part during manufacture comprises the substep of forming said retainment projections along a convex curve, so that the noses of the upwardly extending retainment projections closest to the end sides of the bottom part are placed closest to the front side of the bottom part.
The inevitable deformations of the cover part during manufacture, which affects the reliability and stability of the locking function, are mainly caused by an outwardly bulging of the front side of the cover part. Accordingly, the size of this deformation is depending on the overall size of said front side of the cover part. This bulging of the front side of the cover part is at least in part compensated for by forming the retainment projections along a convex curve, so that the noses of the upwardly extending retainment projections closest to the end sides of the bottom part are placed closest to the front side of the bottom part. The relative offset of the noses may be between 0.3 mm and 2 mm, preferably between 0.3 mm and 1 mm. Investigations by the applicant have shown that good results may be achieved within these ranges by for example using an offset of 0.5 mm. It is a great advantage that these offsets may be performed by incorporating only minor changes in the already existing form tools used for other egg packages.
In a further embodiment of the method according to the eight aspect, the co-operating apertures in the front surface of the cover part are offset upwardly and/or downwardly relative to each other when the egg package is formed. Hereby is achieved a more reliable locking function of the egg package. The relative offset of the co-operating apertures in the front surface of the cover part may be between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.3 mm, for example 1 mm.
The above mentioned and further objects are furthermore achieved by a ninth aspect of the invention, pertaining to an egg package formed by suction moulding of a fibrous material, the package comprising the following main parts:
A preferred embodiment of the package according to the ninth aspect may further comprise a label which is attached to the top surface and front surface of the cover part with an adhesive.
A further embodiment of the package according to the ninth aspect may further comprise a pillow post formed between each two neighboring egg receiving compartments, wherein at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part is higher than 7 mm as measured from the bottom of the neighboring egg receiving compartments.
In a further embodiment of the package according to the ninth aspect, the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part has a height between 7 mm and 20 mm, preferably a height between 7 mm and 15 mm, as measured from the bottom of the neighboring egg receiving compartments.
In a further embodiment of the package according to the ninth aspect the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part is higher than all the other pillow posts in said egg package.
In a further embodiment of the package according to the ninth aspect, the egg package comprises at least eight egg receiving compartments formed in two parallel rows, and at least three upwardly extending retainment projections, wherein the step of compensating for deformations of the cover part during manufacture comprises the substep of forming said retainment projections along a convex curve, so that the noses of the upwardly extending retainment projections closest to the end sides of the bottom part are placed closest to the front side of the bottom part.
In a further embodiment of the package according to the ninth aspect, the relative offset of the noses is between 0.3 mm and 2 mm, preferably between 0.3 mm and 1 mm.
In a further embodiment of the package according to the ninth aspect, the co-operating apertures in the front surface of the cover part are offset upwardly and/or downwardly relative to each other when the egg package is formed.
In a further embodiment of the package according to the ninth aspect, said relative offset of the co-operating apertures in the front surface of the cover part is between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.3 mm.
The above mentioned and further objects of the invention are achieved by a tenth aspect of the invention pertaining to a package for eggs, said package being formed of a fibrous material and comprising the following main parts:
Hereby is achieved an increased stability and stiffness of the upwardly extending retainment projection (extending from the front side of the bottom part at the same place as the at least 7 mm high pillow post), which thereby further increases the reliability of the locking function of the egg package, which—as mentioned before—is machine handled at a tremendous speed in an egg packaging facility, where it is of critical importance that it may be closed and locked by an automatic packaging machine in an error free manner in order to reduce the need for human intervention during the packaging of eggs.
In an embodiment of the tenth aspect of the invention, the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part has a height between 7 mm and 20 mm, preferably a height between 7 mm and 15 mm, as measured from the bottom of the neighboring egg receiving compartments.
In a further embodiment of the tenth aspect of the invention, the at least one pillow post being formed between the egg receiving compartments adjacent to the front side of the bottom part is higher than all the other pillow posts in said egg package.
In a further embodiment of the tenth aspect of the invention, the egg package comprises at least eight egg receiving compartments formed in two parallel rows, and at least three upwardly extending retainment projections, said retainment projections being formed along a convex curve, so they thereby are offset relative to each other such that the noses of the upwardly extending retainment projections closest to the end sides of the bottom part are placed closest to the front side of the bottom part.
In a further embodiment of the tenth aspect of the invention, the relative offset of the noses is between 0.3 mm and 2 mm, preferably between 0.3 mm and 1 mm.
In a further embodiment of the tenth aspect of the invention, the co-operating apertures in the front surface of the cover part are offset upwardly and/or downwardly relative to each other.
In a further embodiment of the tenth aspect of the invention, the relative offset of the operating apertures in the front surface of the cover part is between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.3 mm.
In a further embodiment of the tenth aspect of the invention, the cover part is provided with a label covering the top surface and a substantial part of the front surface of the cover part.
In a further embodiment of any of the above mentioned aspects of the invention, the cover part comprises a tongue, which extends upwardly and inwardly from the lower edge of the one or more apertures, said lower edge of the one or more apertures being substantially flush with the front surface of the cover part, and said tongue being adapted for cooperating with the outwardly and downwardly extending nose. Hereby is achieved a simple—yet effective—locking mechanism, wherein the egg package can be closed and locked by a single mechanical operation of a packaging machinery, because when the package is closed, the inwardly and upwardly extending tongue will slide over the outwardly and downwardly extending nose. During this sliding, the nose and tongue will bend slightly, and then relax back to the normal position when these parts slide pass each other—due to the slight resilience of the fibrous material.
In a further embodiment of any of the above mentioned aspects of the invention, the interface between the cover part and bottom part inclines downwardly from the rear side of the package to the front side, thus yielding a higher front surface of the cover part than back surface of the cover part, thereby yielding a higher front side of the cover part than rear side of the cover part, the higher front side thereby providing more space for the attachment of labels, etc. On opening the cover part of the filled packaging unit, a larger part of the eggs contained in the unit thus becomes visible from the front side of the unit, which is normally the side of the unit facing the customer in a store. This provides for a better opportunity to inspect the eggs in the unit, for instance for possible damages of the eggs, and further hast the effect that the eggs in the unit appear larger. The interface between the cover part and bottom part is preferably curved.
In a further embodiment of any of the above mentioned aspects of the invention, the lower edge of the front surface of the cover part is preferably curved in a downward direction beneath an interface between the cover part and bottom part for extension of the area of the front surface and for facilitating the opening of the unit. This is done in order to provide a better grip of the edge portion of the cover part for opening the unit—and also in order to further increase the area of the front surface of the cover part and hence the possibility to attach labels etc. to this portion of the cover part. For example, the lower edge of the front surface may according to the invention be extended in a downwards direction past the interface between the cover part and the bottom part. The downward extension of the front surface of the cover part may cover up to the total height of the bottom part.
In a preferred embodiment, the cover part according to any of the above mentioned aspects may comprise a rim portion extending outwardly from the cover part. This rim portion may function as a gripping area for automated de-nesting machinery used in most egg packaging facilities.
In most countries there is a legal requirement that egg packages are provided with technical information about the eggs, such as farming conditions, origin, nutritional information, etc. Thus, according to a preferred embodiment of any of the above mentioned aspects of the invention, the inner side of the top surface of the cover part comprises a substantially flat and preferably also rectangular info area, onto which technical details about the eggs are provided. Hereby it is achieved that such technical information is not directly visible from outside a closed egg package and that such information therefore cannot interfere with the label and brand that the producer wants to convey to the consumer.
According to a preferred embodiment of the egg package according to any of the above mentioned aspects of the invention, the fibrous material is pulp.
Advantageously, the bottom part may, according to any of the above mentioned aspects of the invention, comprise a rim portion extending outwardly from the bottom part.
According to an embodiment of any of the above mentioned aspects of the invention, the cover part and the bottom part is moulded as one integrated unit by suction moulding.
The cover of an egg package of the above mentioned kind, i.e. one that is made of a fibrous material, is usually too soft to support layers of additional egg packages filled with eggs on top of each other, for example in a sales rack. Without at least one upwardly extending projection located between the rows of egg receiving compartments to support the cover when the egg package is closed, the weight of the additional egg filled egg packages will rest on the eggs of the lower packages in the stack, which may then break during storage and transport. Thus, according to a preferred embodiment according to any of the above mentioned aspects of the invention, the inner side of the top surface of the cover part rests on the top of said upwardly extending projections of the bottom part when the cover part is in the closed position.
A further understanding of the nature and advantages of the present invention may be realized by reference to the remaining portions of the specification and the drawings. In the following, preferred embodiments of the invention is explained in more detail with reference to the drawings, wherein
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout. Like elements will, thus, not be described in detail with respect to the description of each figure.
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The recesses 32 comprises a bottom wall 34 and two opposing sidewalls 36 extending from the front surface 12 of the cover part to the bottom wall 34 (these features are only marked in one of the recesses 32 in
In the close-up
As illustrated, the partial ovoid portions 20 of the cover part 6 continue in the corresponding egg-receiving compartments 8 in the bottom part 4, the corresponding ovoid portions 20 in the cover part 6 and in the bottom part 4 thereby matching a continuous portion of a surface of an egg. Providing not only the cover part 6 with portions reflecting the shape of the eggs in the unit but also shaping the corresponding portions 8 of the bottom part 4 such that they reflect the shape of the eggs further enhances the visual information about the content of the unit. The individual ovoid portions 20 of the cover part 6 and the corresponding portions 8 of the bottom part 4 may in the closed state of the unit merge into a substantially continuous surface reflecting a relatively large portion of the surface of an egg.
Preferably, the partial ovoid portions 20 located at the end surfaces 10 of the cover part 6 together with the corresponding egg-receiving compartments 8 in the bottom part 5 constitutes not less than approximately 60% of the total surface of an egg. Hereby, the eggs are supported in a manner which reduces the risk of damages of the eggs caused by the accelerations experienced for instance during vibrations of the package 2 and if the package 2 is accidentally dropped. Specifically said compartments 8 can also be formed to support the eggs at the bottom portion of the compartments 8.
Preferably, the surface structure of the partial ovoid portions 20 has a different surface structure than the remaining portions of the cover part 6. By providing those portions of the cover part 6, which reflect the content of the package 2, with a surface structure differing from the surface structure of the remaining portions of the cover part 6, the content of the package 2 is made even more apparent as seen from outside, for instance for a customer in a store.
For example the surface structure of the partial ovoid portions 20 is relatively smooth, while the surface structure of the remaining surfaces of the package 2 are relatively coarse, or alternatively the surface structure of the partial ovoid portions 20 is relatively coarse, while the surface structure of the remaining surfaces of the package 2 are relatively smooth.
As illustrated in
The lower edge 46 of the front surface of the cover part is preferably curved in a downward direction beneath an interface 44 between the cover part 6 and bottom part 4 for extension of the area of the front surface 12 and for facilitating opening of the unit. This is done in order to provide a better grip of the edge portion 46 of the cover part 6 for opening the package 2—and also in order to further increase the area of the front surface 12 of the cover part 6 and hence the possibility to attach labels 42 etc. to this portion of the cover part 6. For example, the lower edge 46 of the front surface 6 may according to the invention be extended in a downwards direction past the interface 44 between the cover part 6 and the bottom part 4. The downward extension of the front surface 12 of the cover part 6 may cover up to the total height of the bottom part 4.
In order to enhance the locking engagement between the noses 28 and the corresponding cooperating apertures 30 in the cover part, the egg package 2 may according to a preferred embodiment be so constructed that the lower part 46 of the front surface 12 of the cover part 6 bulges slightly inwardly. Such an inwardly bulging lower part 46 of the front surface 12 of the cover part 6 will—due to the slight resilience of the pulp material—slide over the upwardly extending retainment projections 26 which will force the front surface 12 to bulge outwardly in such a manner that it will slide over these projections 26 in an abutting manner until the apertures in the cover part will slide over the noses 28, and therefore provide a more reliable locking engagement between the cover part 6 and the bottom part 4.
The egg illustrated egg package 2 is preferably formed by suction moulding of the fibrous material, which preferably is pulp.
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In
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Furthermore, the pillow posts 39 and 41 are shown. Pillow posts are formed between each two neighboring egg receiving compartments 8, and in the illustrated embodiment the pillow posts 41 being formed between the egg receiving compartments 8 adjacent to the front side 24 of the bottom part 4 are higher than 7 mm as measured from the bottom of the neighboring egg receiving compartments 8. Hereby is achieved an increased stability and stiffness of the upwardly extending retainment projections 26 that extend from the front side 24 of the bottom part 4 at the same place as the at least 7 mm high pillow posts 41, which thereby further increases the reliability of the locking function of the egg package 2, which—as mentioned before—is machine handled at a tremendous speed in an egg packaging facility, where it is of critical importance that it may be closed and locked by an automatic packaging machine in an error free manner in order to reduce the need for human intervention during the packaging of eggs.
In the illustrated embodiment the pillow posts 41 being formed between the egg receiving compartments 8 adjacent to the front side 24 of the bottom part 4 are higher than all the other pillow posts 39 (and pillow posts 43 illustrated in
The pillow posts 41 being formed between the egg receiving compartments 8 adjacent to the front side 24 of the bottom part 4 has a height between 7 mm and 20 mm, preferably a height between 7 mm and 15 mm, as measured from the bottom of the neighboring egg receiving compartments 8.
In the close-up
As illustrated, the partial ovoid portions 20 of the cover part 6 continue in the corresponding egg receiving compartments 8 in the bottom part 4, the corresponding ovoid portions 20 in the cover part 6 and in the bottom part 4 thereby matching a continuous portion of a surface of an egg. Providing not only the cover part 6 with portions reflecting the shape of the eggs in the unit, but also shaping the corresponding portions 8 of the bottom part 4 such that they reflect the shape of the eggs, further enhances the visual information about the contents of the unit. The individual ovoid portions 20 of the cover part 6 and the corresponding portions 8 of the bottom part 4 may in the closed state of the unit merge into a substantially continuous surface, reflecting a relatively large portion of the surface of an egg.
In some embodiments, the surface structure of the partial ovoid portions 20 and the concave middle section 32 are different than the surface structure of the remaining portions of the cover part 6. By providing those portions of the cover part 6, which reflect the contents of the package 2, with a surface structure differing from the surface structure of the remaining portions of the cover part 6, the contents of the package 2 is made even more apparent as seen from the outside, for instance by a customer in a store.
For example the surface structure of the partial ovoid portions 20 and the concave middle section 32 may be relatively smooth, while the surface structure of the remaining surfaces of the package 2 may be relatively coarse, or alternatively the surface structure of the partial ovoid portions 20 and the concave middle section 32 may be relatively coarse, while the surface structure of the remaining surfaces of the package 2 is relatively smooth.
As illustrated in
The lower edge 46 of the front surface of the cover part is preferably curved in a downward direction beneath an interface 44 between the cover part 6 and bottom part 4 for extension of the area of the front surface 12 and for facilitating the opening of the unit. This is done in order to provide a better grip of the edge portion 46 of the cover part 6 for opening the package 2, and also in order to further increase the area of the front surface 12 of the cover part 6 and hence the possibility to attach labels 42, etc. to this portion of the cover part 6. For example, the lower edge 46 of the front surface 6 may according to the invention be extended in a downward direction, past the interface 44 between the cover part 6 and the bottom part 4. The downward extension of the front surface 12 of the cover part 6 may in some (not illustrated embodiments) cover up to the total height of the bottom part 4.
In order to enhance the locking engagement between the noses 28 and the corresponding cooperating apertures 30 in the cover part, the egg package 2 may according to a preferred embodiment be so constructed that the lower part 46 of the front surface 12 of the cover part 6 bulges slightly inwardly. Such an inwardly bulging lower part 46 of the front surface 12 of the cover part 6 will, due to the slight resilience of the pulp material, slide over the upwardly extending retainment projections 26, which will force the front surface 12 to bulge outwardly in such a manner that it will slide over these projections 26 in an abutting manner until the apertures in the cover part slide over the noses 28, and therefore provide a more reliable locking engagement between the cover part 6 and the bottom part 4.
The egg package 2 illustrated in
As can be seen from the egg package 2 illustrated in
When the egg package 2 is removed from the mould, the front surface is substantially straight. However, during the subsequent steps of drying and labeling the egg package 2, the cover part 6 undergoes slight deformations, while the bottom part 4 remains more form stable due to its many non-planar parts. The inevitable deformations of the cover part 6 during manufacture affecting the reliability and stability of the locking function are mainly caused by an outwardly bulging of the front side 12 of the cover part 6. Accordingly, the size of this deformation is depending on the overall size of said front side of the cover part 6. This bulging of the front side 12 of the cover part 6 is at least in part compensated for by forming the retainment projections 26 along a convex curve, so that the noses 28 of the upwardly extending retainment projections 26 closest to the end sides of the bottom part 4 are placed closest to the front side 24 of the bottom part 4. The relative offset D of the noses 26 may be between 0.3 mm and 2 mm, preferably between 0.3 mm and 1 mm. Investigations performed by the applicant have shown that good results may be achieved within these ranges, by for example using an offset D of 0.5 mm. It is a great advantage that these offsets can be performed by incorporating only minor changes in the already existing form tools used for other egg packages.
In a further embodiment, the co-operating apertures 30 in the front surface 12 of the cover part 6 are offset upwardly and/or downwardly relative to each other when the egg package 2 is formed. Hereby is achieved a more reliable locking function of the egg package 2. The relative offset of the co-operating apertures 30 in the front surface 12 of the cover part 6 may be between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.3 mm, for example 1 mm.
In the following is given a list of reference numbers that are used in the detailed description of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 11181004.8 | Sep 2011 | EP | regional |
| PCT/IB2012/054229 | Aug 2012 | IB | international |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IB2012/054722 | 9/11/2012 | WO | 00 | 4/7/2015 |
