Smokeless tobacco products can be packaged and sold in round metal, plastic or paperboard cans which have removable metal or plastic lids. A new development is to package smokeless tobacco products, including pouched MST (snus) in hinge-lid boxes.
Machine handling of snus during packaging presents difficulties, because of its tackiness and pillow shape. Boxing operations may include placement of a desired portion (or lot or quantity) into a bag and then placing the bag into a box or other container.
The use of bags requires establishment of “head room” in the bag so that product is not caught in sealing of the bag at its top. The presence of head room in the box creates an impression upon opening of the box being only partially filled and frustrates easy removal of the first several pieces. The latter is particularly true for small boxes such as those which are to be used with snus.
It is desirable to achieve packaging methods and articles which avoid a need for head room and its disadvantages.
In a preferred embodiment, an apparatus for high speed packaging of loose product is provided. The apparatus comprises a loading station, a box forming station, and an unloading station. The loading station includes chutes in spaced apart relation. Each chute has an open top, an open upstream end, and an open downstream end. The open top is configured to receive loose product while moving along a first feed path.
The box erecting apparatus is operable to erect boxes in spaced apart relation with first and second open sides and align the first open side of each box with the open downstream end of a corresponding chute while traveling along a second feed path, which is parallel to the first feed path.
The unloading station includes a stationary vacuum head in communication with the second open side of each box. The vacuum head provides a continuous vacuum source along the second feed path. Preferably, the unloading station also includes a plunger in communication with the open upstream end of the chute. Loose product is transferred from the chute through the open downstream end and to the box at the unloading station.
In the preferred embodiment, the apparatus can also include a lid operable to cover the open top of each chute when positioned at the box erecting apparatus. Also preferably, the lid includes at least one air inlet operable to deliver air from a pressurized air source to each chute so as to agitate any remaining loose product contained in the chute and urge the loose product from the chute.
Preferably, an inner surface of the chute includes a non-stick coating. The vacuum head includes a screen having openings sized to substantially prevent suction of loose products into the vacuum head. Preferably, the plunger moves reciprocally from a first upstream position to a second downstream position when aligned with the open upstream end of the chute. Also preferably, the loading station includes cups operable to dump loose product into the open top of the chute.
In the preferred embodiment, the box erecting apparatus further includes a conveyor for moving boxes along the second feed path. Preferably, the box erecting apparatus also includes a support bar operable to hold erected boxes open while traveling along the second feed path.
In another preferred embodiment, a method of loading boxes with loose products is provided. The method includes loading loose products into chutes in spaced apart relation. Each chute has an open top, an open upstream end, and an open downstream end. The open top is operable to receive loose product while moving along a first feed path. The method also includes aligning boxes in spaced apart relation, each box having a first and second open side, and aligning the first open side of each box with the open downstream end of a corresponding chute while moving the boxes along a second feed path. The second feed path is parallel to the first feed path. The method can also include unloading loose product from each chute into a corresponding box by communicating vacuum through the second open side of each box so as to pull loose product from the chute and into the box.
Preferably, the method can also include advancing a plunger through the upstream end of the chute, through the downstream end of the chute, and into the corresponding box thereby assuring a complete transfer of loose product to the box. In the preferred embodiment, the method can include covering the open top of each chute with a lid prior to applying suction and providing at least one air inlet in the lid operable to deliver air from a pressurized air source to each chute. Also preferably, the plunger is plunged about 2 mm to about 4 mm into the erected box.
In the preferred embodiment, as shown in
In the preferred embodiment, the loose product 122 comprises oral tobacco or non-tobacco pouch products such as those described in commonly-owned U.S. Pat. No. 7,980,251 issued Jul. 19, 2011 and U.S. Pat. No. 7,950,399 issued May 31, 2011, the entire content of each of which is incorporated herein by this reference thereto.
Preferably, the pouch products are formed at a pouch forming apparatus 10, which can be a high speed vertical form, fill and seal apparatus or other suitable pouch forming apparatus. In the preferred embodiment, the pouch forming apparatus such as a vertical filling machine obtainable from Merz Verpackungmachinen GmbH of Germany. Other suitable machines may be sourced from Ropak Manufacturing Company of Alabama, USA, among others.
After formation, the pouch products are moved to a pouch dispenser 20, which dispenses a predetermined quantity of pouch products into individual cups 225 (shown in
Referring now to
In the preferred embodiment, the cups 225 move to the chute loading station 30 via a cup transport system. A suitable cup transport system is a hook type system shown in
The star wheel 500 preferably moves continuously and includes a plurality of claws 501, each of which engages a trailing side of a cup 225 as the latter is released from the inclined chute 505 by retraction of a pin 506, whose retraction is synchronized with the rotation of the wheel 500. A rail (guide) 508 guides each cup 225 into an intersecting relation with an arriving hook 227. The end portion 510 of the rail 508 is spaced from working surfaces of the wheel 500 such that the respective cup 225 is momentarily held in slight compression so that the arriving hook 227 engages and clasps the cup 225 about its recess 297 (
Preferably, the hooks 227 flip the cups 225 sequentially, one at a time, as each cup 225 is positioned above a chute 120 to dump loose product 122 into an open top 124 of the chute 120 positioned beneath and continuously moving with the cup 225. The empty cups are returned to the pouch dispenser 20 and filled again. Alternatively, the pouch products can be moved to the chute loading station 30 by other methods and arrangements. For example, a predetermined quantity of pouch products can be placed directly from the pouch forming apparatus 10 directly into the chute 120 at the chute loading station 30. Arrangements with trap doors and other expedients are also envisioned.
At the chute loading station 30, a plurality of a chutes 120 move horizontally along a continuous loop such that each chute 120 is repeatedly loaded with loose product at the chute loading station 30 and unloaded at the unloading station 50. In the preferred embodiment, the chutes 120 travel in spaced apart relation along the first feed path 4 and are releasably attached to a conveyor that travels horizontally along a rectilinear path at the chute loading station 30 and the chute unloading station 50. Once the chutes 120 are unloaded at the unloading station 50, the conveyor turns downwardly so as to return the chutes 120 to the chute loading station 30.
Preferably, each chute 120 (shown in
As shown in
Preferably, the inner surface 220 of each chute 120 includes a non-stick coating so as to substantially prevent loose product from sticking to the inner surface 220 of the chute 120. Preferably, each chute 120 is releaseably attached to its conveyor to facilitate removal for cleaning.
As noted above, loose product 122 is released into the open top 124 from a corresponding cup 225 as the cup 225 travels in a superposed relation to a respective chute 120. In the preferred embodiment, each cup 225 and a respective chute 120 are superposed and travel at the same speed. Thus, the cups 225 travel along a linear path (the third feed path 502), which is parallel to the first feed path 4 along which the chutes 120 travel. The apparatus is arranged such that each cup 225 is flipped over to release product while a chute 120 is aligned beneath the cup 225.
Referring now to
At or about the same time as the chute 120 is loaded with loose product 122, a box 44 (shown in
In the preferred embodiment, the box blank is in a flattened condition, with top and front panels superimposed over and connected with bottom and back panels, and with dust flaps 159 and side flaps 160 disposed within the general plane of the flattened blank.
Preferably, a rotary blank feed 42 feeds box blanks from a hopper 43. Each blank 162, as shown in
In the preferred embodiment, the box erecting station 40 further includes a conveyor 400 (shown in
Preferably, the second feed path 8 travels substantially parallel to and at the same speed as the first feed path 4 so that each box 44 has a corresponding chute 120 with which to mate at the chute unloading station 50. Thus, at the chute unloading station 50, the second open side 152 of the box 44 is aligned with a downstream end 128 of the chute 120 and the first open side 150 of the box is in contact or proximate with a face 100 of a vacuum head 200 which receives vacuum from vacuum source 102.
Referring now to
Also preferably, the unloading station 50 includes a stationary vacuum head 200 in communication with the second open side 150 of each box 44. The vacuum head 200 in the preferred embodiment is about 1 foot to about 4 feet in length when packaging pouched snus and each box 44 travels along the length of the vacuum head 200 while suction is applied.
In the preferred embodiment, a source of vacuum 102 comprises a vacuum pump connected to the vacuum head (plenum) 200 to provide a continuous vacuum source along the second feed path 8. When packaging pouched snus, the vacuum pump preferably is capable of drawing air at a rate in the range of approximately 300 to 500 cubic feet per minute. In practice, a vacuum pump of 10 horsepower with a rating of 420 cfm and capability to draw vacuum of 100 inches of water should suffice for snus product. Such arrangement provides sufficient vacuum to the product through the vacuum head 200 at the second open side 150 of each box 44 so as to pull loose product 122 from the chute 120 into the interior of each box 44, essentially without compressing the product.
In the preferred embodiment, as shown in
Preferably, the vacuum plenum 200 is located downstream of where loose product 122 is released from a cup 225 into a chute 120. Preferably, agitation of product occurs as vacuum begins to be communicated through the chute 120 to the product 122.
In the preferred embodiment, about three chutes 120 are unloaded at a time. However, more or fewer chutes 120 could be unloaded at a time depending upon the length of the vacuum head 200 and the spacing between the chutes 120.
Also in the preferred embodiment, as shown in
Once the box 44 is filled with loose product 122, the box dust and side and flaps 159, 160 are optionally glued and folded at the box folding station 60 to close and optionally seal the box 44. The box 44 is then inspected at the box inspection station 70 to check for holes, improper seals, and the like.
As shown in
By such arrangement as described above, snus and other loose product may be loaded into a box or other container with a more complete, uniform, homogeneous and efficient disposition of the loose product within the container. Undesirable and troublesome headspace is avoided. Smaller containers can be used for the same amount of product, which may lead to significant savings in packaging materials and space requirements in displaying product at retail. The arrangement provides high speed production capability, particularly with boxing of pouched snus product.
In another preferred embodiment, a method of filling or loading boxes with loose product(s) is provided. Broadly speaking, the method includes establishing a procession of package structures, each of which has first and second openings and an interior space or volume. Establishing the procession of package structures may also include folding open flaps of a package. In addition, the method includes repetitively establishing predetermined quantities of loose product and repetitively disposing said quantities at locations adjacent said first openings. That repetitive disposition of quantities may include loading loose products into chutes in spaced apart relation. Each chute has an open top, an open upstream end, and an open downstream end. The open top is operable to receive loose product while moving along a first feed path. The method also includes aligning boxes in spaced apart relation, each box having a first and second open side, and aligning the first open side of each box with the open downstream end of a corresponding chute while moving the boxes along a second feed path. Preferably, the second feed path is parallel to the first feed path.
Also preferably, the method includes transferring or unloading disposed quantities of loose product from each chute into the interior space of a corresponding box by applying or communicating a vacuum through the second open side of each box so as to pull loose product from the chute and into the box. The transferring step may further include moving the open package along a vacuum plenum.
Preferably, the step of transferring of loose product by communicating a vacuum includes agitating the loose product while applying vacuum. In the preferred embodiment, the method can include covering the open top of each chute with a lid as or prior to applying vacuum and providing at least one air inlet in the lid operable to deliver air from a pressurized air source to each chute to agitate product as vacuum is applied.
Preferably, the method can also include purging the chute or passage or errant product by advancing a plunger through the upstream end of the chute, through the downstream end of the chute, and into the corresponding box thereby assuring complete transfer of loose product to the box. Preferably the plunger is advanced into the interior of the box slightly, such that mechanical compression of product is avoided or minimized. Also preferably, the plunger is plunged only about 2 mm to about 4 mm into the erected box.
When the product has been loaded into the box, the method also includes closing the first and second openings of the box.
In this specification, the word “about” is often used in connection with numerical values to indicate that mathematical precision of such values is not intended. Accordingly, it is intended that where “about” is used with a numerical value, a tolerance of ±10% is contemplated for that numerical value.
While the foregoing describes in detail an apparatus and method for packaging loose product with reference to a specific embodiment thereof, it will be apparent to one skilled in the art that various changes and modifications and equivalents to the apparatus and method may be employed, which do not materially depart from the spirit and scope of the invention.
This application is a continuation application of U.S. patent application Ser. No. 13/666,485, filed Nov. 1, 2012, which claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 61/554,303, filed on Nov. 1, 2011, the entire contents of which are incorporated herein by reference.
Number | Date | Country | |
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61554303 | Nov 2011 | US |
Number | Date | Country | |
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Parent | 13666485 | Nov 2012 | US |
Child | 15845334 | US |