JPS5974076A - Package and its manufacture and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to packaging a large number of products such as cancer, bottles, etc. to make a large number of packages.In particular, the present invention relates to packaging a large number of products, such as cancer bottles and bottles, to make a large number of packages. It involves creating a unitary package by heating and adhering to the tray, or by then heat shrinking the film to firmly hold the product in the tray. This application is filed in co-pending application No. 683.61 by the applicant.
No. 1 (May 5, 1976) and No. 322,443 (November 18, 1981). Devices for packaging products in vaporboard trays by placing a film over the product and then gluing this to the tray are known in the prior art; such devices are available from Betbayres. No. 3,890,763 (June 24, 1975) and my co-pending application Ser. follow

[, trade name “WrapOap” and “PacO
ap". In these devices,
The product to be packaged is placed in an open-topped paperboard tray and moved along a predetermined path. A heat-shrinkable film covers the products K in the tray as the tray is conveyed along said path, and then a number of flight bars moving along an endless path tighten the film onto the products and tighten the tray. It is hung on both sides so that it overlaps. In one version of the above apparatus, a suitable adhesive, such as a hot melt adhesive, is applied to the side walls of the tray before the film is placed thereon, and then a flight bar attaches the film to the adhesive. Apply sufficient pressure to both sides of the applied tray so that the adhesive adheres the film to the tray. In other versions of the above devices, the film's own material, rather than adhesive, is used to adhere the film to the tray. To achieve this bonding, the film is bonded to a cellulose tray under sufficient heat, time and pressure.
It is necessary to be able to form a fiber cut bond 1. In this thermal bonding type device, the flight bar presses the film onto both sides of the tray (while it is heated), and the film is bonded to the tray and to the side walls with a single fiber break bond. Stay in this state for a sufficient period of time to
can come. In both of the above-mentioned types of apparatus, the film is cut between the trays in order to separate the trays obscured by the film, and in this case the product K is placed over the film and glued to the side walls of the tray. keeps the product in the tray. Typically, the film used is heat shrinkable and the separated packages as described above are passed through a heated tunnel, thereby shrinking the film and tightly locking the product in the tray. Although both types of equipment described above can produce packages that have some advantages, such as no film on the bottom of the tray, packages made with these devices have some disadvantages. has. That is, it is necessary to leave an unbonded portion of the film below the point where the film was glued to the sidewall of the tray, but this portion of the film (typically referred to as the skirt) is not glued. This can cause the package to become caught in the handling equipment during subsequent handling operations, and during the heat-shrinking operation, the skirt may become stranded, causing damage to the side walls of the tray. The problems and drawbacks of the prior art described above are overcome by the present invention, and the multi-product packaging according to the present invention is placed in a paperboard tray. A film is applied on the product group, and the film is placed on both side walls of the tray.
It is glued so that no unbonded skirt portions are left on the side walls. A multi-piece package may be initially produced on one of the prior art apparatuses mentioned above, with
The film is first bonded to the side walls of the tray in a first position, leaving an unbonded skirt on the side walls due to the thickness of the flight bar. A secondary bonding process then adheres the skirt to the side walls of the tray to create a clean package and increases the transparency of the skirt to reveal the print on the side walls of the tray below the film. Other displays are not obstructed. The secondary skirt bonding operation described above may be performed without adversely affecting the initial bonding of the film to the side walls of the tray. In fact, this secondary bonding increases the area over which the film is bonded to the side walls of the tray, thus increasing the strength of the bond. The package of the present invention has a paperboard tray,
The tray has a bottom wall, upright side walls and upright end walls forming an open top product receiving chamber into which a group of products such as guns, bottles, jars etc. are filled. . A plastic film is placed over the product, and the film is adhered to both side walls of the twist tray for primary bonding. At this time, an unbonded skirt portion is left below the next bonding, but this skirt portion is then thermally bonded to the side wall of the tray and placed in surface contact with the outer surface of the side wall. Therefore, the transparency of the skirt portion is enhanced. - The subsequent bonding can be done by adhesive or thermal bonding. In addition, the second adhesion is performed before the heat shrinkage of the film, and the adhesion of the skirt part (
That is, secondary adhesion) can be performed either before or after heat shrinking of the film, but is typically performed after the masquerade is removed from the heating tunnel. Also, the edge of the film that overlaps the end wall of the tray is glued to said end wall to make the package aesthetic. Typically, the edges of the film are adhered to the end walls of the tray after heat shrinking the film. The present invention also provides a method for manufacturing multi-piece masquerades, which method comprises: placing an open-topped cellulose tray with a set of upright side walls into a set of products; , place a plastic film over the products in the tray as they are fed along the planned path; while keeping the film on the products, first glue the film to the outside of the side wall of the tray, making sure that the above-mentioned glue and the edges of the film Leave an unbonded skirt portion in between; then heat bond the skirt portion of the film to the outside of the side wall of the tray so that the skirt portion is in surface contact with the outside of the side wall to increase the transparency of the skirt portion. Consists of things. The method further includes heat-shrinking the film to lock the package, which heat-shrinking operation typically occurs between subbonding and skirt bonding (secondary plying). - Next bonding is typically done by heating and pressing the film against the sidewalls of the tray, thereby thermally bonding the film to the sidewalls. The edges of the film are heat bonded to the end walls of the tray immediately after heat shrinking. The present invention will be explained below with reference to embodiments shown in the drawings. As shown in FIG. 1, a multi-product masquerade body 10 according to the present invention
is a cellulose tray 11. The basic process of making this temporary body 10, which is formed from a number of products 12 and a film 14 which is placed over the products 12 and attached to the side walls of the tray, is shown in FIG. 1. Adhesion In the process, a continuous sheet of film is placed on top of the product in the tray and then glued to the four walls of the tray on both sides.
eIt will arrive. The film is then cut between the trays, dividing the trays into individual trays with a film 14 overlaid on the products 12 therein, thus forming an intermediate bonded package 10W; Masquerade body 1. OW is
It has unbonded skirts along both sides of the tray. The welded package tOW is then sent to a heat shrinking process in which the film 14 is heat-shrinked, during which time the film is held on the product 2 by the above-mentioned adhesion. The films 14 hold the products in their position as they are heat-shrinked, thus forming a heat-shrinked masquerade ioH. Immediately after the film has been heat-shrinked, the package is passed between one silk roller, which pulls the shrunken film down along the end walls at each end of the tray, thus forming an edge-glued disguise. Body 10. C is formed. The package 10 has 4
, sometimes it is sent to a cooling process, and then the film 14
Once cooled, tension is applied to the filters and the products are secured in their position. The disguise is then rotated in a rotation step and then sent along the longitudinal axis of the package to a skirt bonding step where the skirt of the film is heated and pressed against the side walls of the tray. , thus forming a smooth skirt bond. The cellulose tray 11 can be made of paperboard, chipboard, cardboard, etc., but typically,
Made from uncoated corrugated paperboard. sheet 14
Plastic films for are usually heat-shrinkable,
Thus, after being applied to the tray, it can be contracted to secure the products in their position. If the film 14 is primarily adhered to the tray 12 using an adhesive, the skirt portion of the film will increase the adhesion (2) to the side wall of the tray when heated and pressed. , since the adhesion of the skirt portion does not require that it be able to hold the load.On the contrary, the film can be attached to the tray 12 using thermal adhesion.
When primary bonded to a cellulose tray, the film is thermally bonded to a cellulose tray to create a ``fiber break bond'' (“fiber break bond”).
In fiber tear bonding, the film must be able to form a bond that is commonly referred to as a cellulose fiber bond ("er-tear bona") to prevent the bond from breaking without tearing the cellulose fibers from the tray. Adheres satisfactorily to the cellulose tray 11. Although a wide range of different films are heat shrinkable, not all heat shrinkable films can be adhered to the cellulose tray 11. In order to make it easier to adhere to, it is necessary to treat the surface by corona discharge or flame treatment.These treatments improve the adhesion of the ink to such films. Depending on the surface treatment used. In the case of multilayer films, some may or may not require a surface treatment in order to adhere to the cellulose tray. Films that can be used include, for example, polyethylene, polypropylene, etc. and polyvinyl chloride. FIGS. 2 and 3 show a large number of N-item disguised bodies 10 of the present invention
A typical packaging bag [20 is shown for manufacturing a bag, and the mechanical arrangement of the apparatus 20 is described in the aforementioned U.S. Pat. No. 3,890.7.
No. 63 (June 24, 1975, same as applicant's present application) and pending U.S. Patent Application No. 683,611 (1qq.
r, 1iF-F January 5 - Applicant Same as the present application) as shown in the specification. Above, Patent No. 3,890,76
The @ placement shown in the specification of No. 3 is configured to adhere the film to the tray by adhesive rather than by thermal adhesion, but the above-mentioned patent No. 3.1390.763
The apparatus shown in that patent can be modified to provide thermal attachment by attaching a suitable electric heater to the flight bar. The packaging apparatus shown in FIGS. However, this does not limit the present invention. Basically, the thin bag device 20 has a hot water supply point 21,
The supply station 21 supplies the cellulose tray 11 containing the product 12 to the pressing and gluing station 22, and once the tray 11 enters said station 22, the continuous film F fed from the constant tension unwinding machine is decorated on the top edge of the product in the tray. The pressing and gluing station 22 has a number of flight rakes 25 moving along an endless path, said bars pulling the film on the products in the tray and pressing it against the side walls of the tray. The film is sufficiently heated while being pressed against both side walls of the tray, and is thermally bonded to both side walls of the tray. The fly par 25 has a cutter CM (FIG. A separated supine body Low is formed. The narrow bag body glued in this way is delivered from the pressing and gluing location 22 to a delivery location 26 .
6 sends out the phrase body 10w from the location 22. The transfer station 28 then transports the upholstery tOW to a shrinking station 29, where the film 14 on the product 12 in the tray 1 is shrunk to form a heat-shrinked narrow bag 10H. When the package leaves the shrinkage location 29, it is moved to the edge gluing location 3.
θ, where the film 14 is adhered to both ends of the tray to form an edge-glued package 10E. The thus formed upholstery 10 is then typically passed through a cooling station 31 where the shrunken film is cooled and the film is then tensioned as desired and placed in the tray 1.
Make sure the products in 1 are firmly fixed. Cooled package 10E
leaves the cooling station 31 and enters the rotating station 32, where the supine body is moved from [the position where its transverse axis lies along the path of motion] to the position where its longitudinal axis H1 is located along the motion path. It is rotated to a position along the road. The packaging 10i thus reoriented is sent to a skirt gluing station 34 where the skirt portion of the film 14 is placed near and below the primary bond where the film is thermally bonded to the side walls of the tray. <K-glued and therefore side-glued phrase body 10
B is formed. The cellulose tray 11 is as shown in FIG.
This figure shows a tray material 11B1 and a three-dimensional (completed) tray 11. The tray 11 has a rectangular bottom wall 40 connected to the bottom wall 40 along a fold line 42 shown on the blank 11B, and further includes:
A set of end wall materials is connected to the bottom wall 40 along a fold line 45. Attachment pieces 46 are connected to both ends of each side wall 41 along a fold line 48 . The side wall 41 is folded vertically upwardly relative to the bottom wall 40 along a fold line 42, and the attachment piece 46 is folded inwardly along a fold line 48 perpendicular to the fold line 42 so that the end Wall 44 may be attached to mounting strip 46 by adhesive. It should be noted here that the tray can also be made by attaching the piece 46 to the end wall 44 in a diffractive manner and gluing it to the side wall 14J. The V-shaped tray 1 defines therein an open top product holding chamber 49 formed by side walls 41, end walls 44, a mounting piece 46 and an inner surface 50 of the bottom wall 40. The outer surface 51 of the side wall 41 and the outer surface 52 of the end wall 44 are left free for the addition of the film 14. The tray 11, before reaching the pressing and gluing station 22, is loaded with a group of products 12, such as guns, bottles, jars, etc., in a known manner. The number of products 12 in each group can be varied as desired; in the illustration, groups of 6 x 4 products are shown, but this is for illustrative purposes only;
This is not intended to limit the invention. As shown in FIGS. 1 to 3, the tray 11 loaded with products is placed at the supply location 2.
1, the tray is fed along the path Pp such that its transverse axis AT coincides with the path Pp, and the feeding station 21 feeds the tray thus oriented to the pressing and gluing station 22. The location 22 can be of two types. i.e. non-adjustable types designed to handle trays of one size, as shown in the above-mentioned patent pR3s 890 t 76 A; , and an adjustable type designed to handle additional trays with dimensions R. Any of these types may be configured to be adhesively or thermally bonded to the side walls of the film tray. If adhesive is used, the tray is moved in a longitudinal direction and each side wall is exposed to its own adhesive applicator to receive a long longitudinal strip of adhesive and then the film is adhered. A rotating machine, as shown in FIGS. 1-3, is provided to rotate the tray from horizontal to horizontal travel prior to film application. FIG. 9 shows for illustrative purposes a non-adjustable press and bond location 22 provided for thermally bonding the film to the side walls of the tray. Flying par 25 moving the tray through the field PJT 22
are placed perpendicular to the path of the tray through this location 22 (ie perpendicular to the path Pp), each par having a leading side 55 and a trailing side 56. A preceding heater 5 is provided on the preceding side 55.
8 is attached, and the advance heater 58 engages the film F and transfers it to the tray 11 preceding the flight par 25.
Press it against the caudal side wall of the Tail end side 56 of flight par 25
is fitted with a tail end heater 59 which engages the film F and presses it against the leading side wall of the tray 11 following the flight par 25. The leading and tail end heaters 58 , 59 have the same structure, and each heater 58 , 5
9 has an electrical resistor 60 for heating as shown in FIG. The heating resistor 60 is covered with a non-adhesive cover 62 to prevent the heater from sticking to it.
Heaters 58 and 59 heat the film as it presses against the side walls 41 of the tray, thereby causing
The film is heated to a bonding temperature and bonded to the tray in a fiber tear bond. The flight bar 25 is a film cutting mechanism C having a known structure.
M (FIG. 10), the film cutting mechanism CM is placed between the heaters 58 and 59 and can be selectively ejected from the projecting end of the flight parr 25. This cutting mechanism (3M) serves to cut the film passing under the flyper between adjacent trays, thereby cutting the film between adjacent trays after the film has been adhered to the side walls of the trays. Now, as shown in FIG. 9, the pressing and bonding location 22 is projected to apply the film to a tray of one size by primary heat bonding. In between, the bars 25 are mounted to move one after another along an endless path, and the bars 25 are mounted to the chain so as to project outwardly from the chain at regular intervals along the chain 65, thus Flight par 25
are vertically spaced apart from each other as they move along the lower horizontal run of chain 65. chain 6
5 moves in a counter-clockwise direction as seen in FIG. to the right) and return along the upper run of the chain. Beneath the lower run of the chain 65 are a number of freely rotating or driven rollers 66 for holding the tray rack 1.
Therefore, the heaters 58, 5 on the flight bar 25
9 engages the side wall 41 of the tray 11 as the flight parr 25 moves along the downward running portion of the chain 65. The spacing between the flight bars is such that as they move along the lower run of the chain 65, the tray 1 is captured between two adjacent flight bars 25 and moved on the rollers 66. . The film F extends below the lower protruding end of the flight par 25 that moves along the lower running portion of the chain 65, and is unwound under tension by the unwinder 24 shown in FIGS. 2 and 3. The film F is extended below the downwardly projecting end of the flight par 25 moving along the downward running portion of the chain 65 and is kept under tension by the unwinder 24 shown in FIGS. 2 and 3. Each loaded tray 11 is delivered from a supply location 21 to
It is sent toward the tail end of the fried bar 25 on the lower run of the chain 65 at the artificial end of the location 22 . The spacing of the trays at the supply station 21 is determined such that incoming trays do not interfere with the movement of the flight pars 25, which are flanked by the chains 65. At this time, the leading side wall 41 of the incoming tray is pressed against the tail end heater 59 on the flight par 25, and the film F is spread over the products in the tray 11 from between the heater 59 and the leading side wall 41. It will be done. The chain 65 is then advanced and the feed station 21 keeps the tray pressed against the flyper. When the next fly par 25 enters the lower running part of the chain, its protruding end engages with the upper surface of the film F.
The film is pulled over the top of the products 12 in the tray 11. When the next flight par 25 assumes a vertical position on the lower run of the chain 65, the heater 58 on the leading side of the bar 25 presses the film against the trailing sidewall 41 of the tray 11. The spacing between the fly pars 25 is determined so that the film is pressed against the side wall 41 of the tray with the required pressure,
Therefore, the film F is bonded to the side wall 41 of the tray 11 when heated to the bonding temperature. As mentioned above, two adjacent flight pars 25 form a pocket between them as they move along the lower run of the chain 65, and as the flight pars move towards the exit end of the location 22. A tray covered with film is carried in the pocket. When the tray is moved through the location 22 in the pocket, heaters 58 and 59 are activated on the side walls 4 of the tray.
1 is heated to a bonding temperature, thereby bonding the film to the sidewalls 41 of the tray. Since the film is continuous, it remains connected to the trays in adjacent pockets. To separate the film between the trays, a cutting mechanism in the flight bar is actuated to separate the trays after the film is adhered. The flight par 25 that precedes the tray is
On reaching the exit end of location 22, it rises from the lower run of chain 65 into the upper run (return run). This frees the tray with the film glued to it and
These are sending 1. Placed on #8 place 26. The adhesion of the film F to the side walls 41 of the tray is dependent on the adhesive properties of the film used, and the adhesion of each film depends on temperature, contact pressure and the formation of an acceptable adhesion between the tray and the film. is a function of time. In other words, each film is pressed against tray 1 (with a predetermined pressure, VC′g, which adheres the film to the side walls of the tray, for a period of time such as These required adhesion factors vary depending on the film and are typically
Determined for various films through experiments. - As an example, a typical factor for a monolayer film of low density polyethylene having a thickness of about 0.05 mm (0,002") is about o,g5~θ,7 kFvcm2 (
Approximately 118-148 at a pressure of 5-1 Opsi)
℃ (250-300 F) for about 3-4 seconds. The amount of pressure applied at locations 22 is controlled by the spacing between the fly pars 25 and is determined so that the film F is pressed into the desired contact with the tray 11 in each pocket. The electric heaters 58 and 59 are connected to the chain 6.
When moving along the endless path on 5, power is constantly supplied from the endless busbars, so that they are always kept at the predetermined temperature and the film is heated towards this temperature. The time that the film is heated during normal operation is determined by the time it takes for each pocket holding a tray to move from the entry end of location 220 to the exit end. The pressing and gluing locations 22 are designed in such a way that the flight pars 25 advance one position each time a loaded tray 11 is received. When the tray 11 is fed into the location 22 at its designed capacity, the time required to advance the pocket from the entry end to the exit end of the location 220 is minimized. The number of pockets that are kept under compression at the same time is such that when the locations 22 operate at their designed capacity, the film F is placed on the side walls 4 of the tray.
Each pocket is kept under compression for a period of time slightly longer than the time required to adhere to the pocket. Many of the films that can be welded to trays, such as low density polyethylene, have the disadvantage of melting or burning out if kept at bonding temperatures for too long, and this is especially true for single layer films. This burnout time is, of course,
This is longer than the time required to adhere the film to the side walls of the tray. To prevent burnout of the film when the equipment is operating at its design capacity, the number of pockets held under compression at the same time shall be such that each pocket is held under compression for a time equal to or greater than the burnout time of the film used. It is determined that there will be no However, if the tray flow is interrupted in location 22,
The time the pocket is held under compression can exceed the burnout time of the film. To prevent burnout of the film in such a case, a suitable control circuit is provided which controls the temperature of the heaters 58, 59 for each pocket if the pockets are kept under compression for a time greater than the burnout time. It serves to lower the holding temperature to a temperature low enough to prevent film burnout. Of course, the temperature of the heaters 58, 59 for each pocket need not be reduced if the location 22 is operating at normal speed. As shown in Figure @10, the heating element 60 in each heater 58, 59 has a height hE smaller than the height hU of the heater,
The height l'lt of the side wall 41 and the end wall 44 is the height of the heater 58.
, is greater than the height of 59. Heater 58 shown in FIG.
Or the height hw of the primary thermal bonding WP formed by 59
corresponds to the above height hlli. Heating body 600 typical height h1! One of i is approximately 12.7 mm ('/2”)
and forms a bonding height hw of approximately 11 to 14 mm (V16 to e/, 6@). The height hU of the heater is usually 25.
The height hT of the tray varies depending on the dimensions of the product, but is typically 51 to 180 mm (2,7"), and in the illustrated example, it is approximately 51 mm (2"). ).This allows the welded WP to be formed near the upper end of the side wall 41, and the distance from the upper end of Wp to the upper end of the side wall is 6 to 12.
mm (l/4 to 1/2°). The elastic pad 61 has a thickness equivalent to that of the heaters 58 and 59.
Even if the side wall 41 is deformed due to the outer shape of the product 12 in the tray 11 when the product 12 is pressed against the side wall 41, it can conform to the side wall 41, so that adhesive pressure is maintained over the entire length of the side wall 41. - Next tangent MWp is sidewall 41 and I# fiber tear adhesion 1
form. As shown in No. 101gJ, the downward protruding end of each flight par 25 has an effective buried depth tp, and 1F has a
two heaters 58 and 590 force bars 62 on either side of the
substantially equal to the distance between When the film F is adhered to the side wall 41, it extends below the flight par 25, so that the intended portion of the film remains under the adhesive WPO. When the film is cut, half of the excess film remains attached to each tray 11 to which the film is glued, and said half of the film is attached to the thermally glued package 10W as shown in FIG. An unbonded skirt portion 72 is formed on top. That is, the film 14 extends below the adhesive WPO by a distance ``FIn'' extending to the free end 7o of the film. Go outside.The above distance axg is
It should be determined that during heat shrinkage the film 14 does not shrink too much and be pulled up onto the products 12 at the ends of the group. On the other hand, if distance dn, flight par 2
5 thickness 1. controlled by, usually 25-38mm
(1 to 1.5"). The package 10W, which has been thermally bonded and divided into individual pieces, is sent to the transfer location path via the delivery location 26, and is transferred to the transfer location path 28.
The above-mentioned glued package 10W is continued to be fed along the operation path PP so that the transverse axis AT of the package coincides with the path PP, and the package 10W is shown in FIGS. 2 and 3. Place it on a conveyor 75 in the heat shrinking station 29 shown. The conveyor 75 carries the package 1. The OW is moved along its lateral axis AT through the heat shrink location 29. Heat shrink location 2
9 has an end heater 76 for heating both ends of the package 10w moved on the conveyor 75, and a group of upper end heaters 78 for heating the upper end of the package. and 78 serve to heat the film to the desired temperature for heat shrinking it around the product. The operation of the heat shrink station 29 is well known, and the heat shrink station 29 may be of the infrared or hot air type. FIG. 6 shows the glued and shrunk package ioH after being heat shrunk in the shrink station 29. Here, tray 1
Both ends 74 of the film 14 protruding from both ends of the side wall 41 of the package 10 are pulled down on the products 12 at both ends of the product group, so that the product group is aligned with the longitudinal axis AT of the package 10H.
are held together in the J direction. Also, by this operation, the end portions 74 surround both corners of the tray 11 and are pulled down to the end walls 44, but are not adhered thereto. When the film 4 is shrunk onto the products 12, - the charcoal adhesive WP keeps the film 14 glued to the side walls 41 of the tray 11, so that the batch of products 12 is compressed onto the package toH. are held together in the direction of their transverse axis AT. The adhesive Wp also serves to fix the group of products 12 and the tray 11 as an integral package. In this form, the film 14 protruding below the adhesive WP
The unbonded skirt portions 72 along both sides of the tray remain unbonded to the side walls of the tray. The bonded and shrunk package 10H in this state is f'
4% As shown in Figure 6, the desired packaging integrity is achieved due to the holding power of the secondary adhesive WP. However, in this state, the skirt portion 72 and the end portion 74 are not yet bonded to the tray 11. This is undesirable both from the aesthetic point of view and from the point of view of handling. The creases 1 in the skirt portions 72 and ends 74 caused by the gluing and heat shrinking operations will cause the side walls 41 and end walls 4 to underlie these portions.
4 to prevent damage to the printed PT on the parts 72 and 7.
4 can become trapped in the bag handling equipment and damage the integrity of the film 14 and/or the package. After the package 10H is removed from the shrinkage station 29, it is placed on a conveyor 75 and passed through an end bonding recess 30. As shown in FIGS. 2 and 3, the end bonding station 3 is placed on a conveyor 75 and has one roller means 8o placed on either side of the conveyor 750, each roller means 8o having a The swing arm 82 has a non-adhering 10-shape 81 rotatably mounted around the vertical axis, and the swing arm 82 is also swingably mounted around the vertical axis. roller 8
1 is pressed against the edge of the tray. Therefore, the roller 81 is inward; IF'MR"Kh f )4
1L tr'+PRIn-L l/ノ11 J-+j
4r + roller 8] rolls along both end walls 44 of the tray 11. As shown in FIG. P11, the roller 81 rolls on the end 74 of the film 14 that is located at the end wall 44 of the tray 11. The roller means 80 is placed sufficiently close to said heaters 76 and 78 so that the end 74 of the film 14 which has followed the shrinkage point 29 remains sufficiently hot so that said end The portion 74 can be adhered to the end wall 44 by the pressure of the roller 81. This causes the ends 74 of the film to adhere to themselves and to the end wall 44, thus preventing them from being rolled into the handling equipment. Peeling and the appearance of the end-bonded package 10F are improved. The bond between the end 74 of the film 14 and the end wall 44 of the tray does not necessarily have to be an I-twill tear bond 1;
This is because the -F adhesive does not require that the adhesive WP retain the primary weight it is subjected to in order to maintain the integrity of the package. However, if these bonds have fiber tear adhesive properties, overall bag integrity will be enhanced. Typically, the edge 74 of the film 14 is at a temperature of about 122-133°C (250-133°C).
270 F') and thus can provide a bond with some fiber tear adhesion given the appropriate pressure and time. However, the repulsive force on roller 8 is that the package is moved entirely by the conveyor 75; therefore, the movement of the package is
and the tray 11 due to the frictional force.
somewhat limited. Typically, the pressure of roller 81 on the film is about 5-10 psi (0.35-0.7
kg/cB2), but this pressure is
and the drive between the tray and the tray can be increased by making it more aggressive. As shown in FIG. 11, the roller 81 is moved by a distance dE where the end 74 of the film 14 extends downwardly on the end wall 44 of the tray 11.
R, which has a height hlllR greater than R, so that the entire end 74 in contact with the end wall 44 of the tray is pressed flat against the end o44, thus increasing the transparency of the end 74 and thus the film Printing underneath is reduced. FIG. 7 shows a package 10. and the edge adhesion is indicated as BEI. As shown in FIGS. 2 and 3, a package 1 with edges glued
0, the conveyor 75 in the shrinkage station 29 is also taken out and sent to the cooling station 31, where one package 10]! 1 is sent along the passage PP with its transverse axis AT coinciding with the operation passage PP. The cooling location 31 is the packaging body 10
III is allowed to be exposed to the outside air, which cools the film 14 and tensions the heat-shrinked film 14, thereby firmly weighing the product 12 and tray 11 together to form an integral part of the package. sex is increased. The Q body 11 is sent from the cooling place 31 to the rotating place 32,
Here, the direction of the package 10E is changed so that the longitudinal axis AL of the package is aligned with the operation path PP. Rotating place 3
2 (FIG. 3) has a large number of actuating rollers (rotating rollers) 84, and the actuating rollers 84 move the package 10E through the path P.
Move along p. A rotating collision body 85 is provided on one side of the passage Pp.
is provided, and the rotating impactor 85 engages one corner of the package 103 and holds said corner in that position while the actuating roller 84 continues to move the other end of the package, thereby The body is rotated about its center so that the longitudinal axis AL is aligned with the passageway PP. A deflector 86 is installed on the other side of the passage PP.
is provided, and the deflector 86 pushes the rotated end of the package 10IC inwardly to complete alignment of the longitudinal axis AL with the passageway PP. When the package 1ONll is rotated in this manner, the skirt portion 72 of the film 14 along the side wall 41Vc of the package 1ONll is rotated iL! ] are placed in alignment with said passageway at a distance from both sides of said passageway PP. It should be noted here that the rotating location 32 may have other configurations without departing from the scope of the invention. The rotated package 10 is conveyed from a rotation station 32 to a skirt bonding station 34, as shown in FIGS. 2 and 3. The skirt bonding place 34 has a holding frame 90, and the longitudinal axis of the holding frame 90 coincides with the operating path Pp. An endless conveyor belt 91 is rotatably placed on the frame 90, and the belt 91 moves along the path PP. Conveyor belt 91 is driven by a drive motor 92 and the upper run of belt 91 moves from left to right (as viewed in FIGS. 2 and 3). The rotated packages 10.1 emerge from the rotation station 32 onto the upper run of the conveyor belt 91 and
1 moves the package 10K along the path Pp with the longitudinal axis AL of the package aligned with the path PP. Skirt gluing station 34 further includes a set of gluing means 94 disposed on both side frames 90 of conveyor bell 910 near the downstream end of this site 34, which means 94 are shown in FIGS. 33-16. As shown. Adhesive means 94
each has a straight inner plate 95, and the inner surface 96 of the straight inner plate 95 is parallel to the passage PP and outward by a predetermined distance d (IF) from (the center of) the passage PP, as shown in FIG. The guide plate 95 is mounted on a suitable adjustable mounting 9.
8 to the frame 9o, and the conveyor belt 91 transports the package 10. When moving along the path PP, as shown in FIG. 14, it is restrained between the guide plates 95,
Therefore, the unbonded skirt portion 72 of the film 14 protruding below the adhesive WP remains pressed against the side wall 41 of the tray 11. The guide plate 95 is provided with a heater window 99 upstream and a roller window 100 downstream thereof that extends upward from the lower end of the guide plate 95.
matches window 100. A heating means 101 is provided in the frame 9O-J- at the position of the heater window 99, and the heating means 101
Further, roller means 102 is provided on the frame 90 at the position of the roller window 100, and the roller means 102 moves the skirt portion 72 of the film 14 onto the tray 11. Press it against the side wall 41 to adhere the film. The heating means 101 can be of an infrared type or a hot air type,
The one shown is of the hot air type and is generally referred to as a .1 air torch 1. The illustrated heating means 101 has an elongated cylindrical body 104 with an axis AH, a hot air exhaust pipe 103 emerges from the cylindrical body 104, the hot air exhaust pipe 103 has an air horn 107, and the air horn 107 has an air horn 107. , the discharged hot air is directed approximately in the direction of the axis AH, but with a larger cross section in one direction than in the other direction, thereby changing the amount and location of the heat applied to the film 14. Obtaining 3. In the body 104 of the heater, a heating element 131 as shown in FIG. The heater body 104 is mounted in an adjustable plaque 105 held on adjustable mounting means 106. The adjustable attachment means 106 has a spacing tube 108 attached to the frame 9o and projecting laterally outward, a vertical holding tube 109 is attached to the tip of the spacing tube ios, and a vertical holding tube 109 is installed in the upper end of the vertical holding tube 109. The retaining post 110 is a sliding fit, such that the retaining post 110 adjustably protrudes from the upper end of the retaining tube 109 . A suitable locking mechanism 111 is provided to secure the retaining post 110 in any vertically adjustable position relative to the retaining tube 109. Adjustable bracket 1 to which the heater body 104 is attached
05 is placed near the upper end of the holding column 110, so that the axis AH of the heater extends horizontally inward from the plastic plate 105 toward the window 99 in the guide plate 95. Heater main body 10
Since 4 is tubular, the main body 104 is an air horn 107.
can be rotated about axis AH to orient the principal axis of. Air horn 107 may also be rotated relative to hot air tube 103. Moreover, the main body 104 of the heater is
It can be moved back and forth along its length j (to approach or approach the window 99 in the guide plate 95, thus making it possible to place the air outlet of the air horn 107 at a desired distance from the skirt portion 72 of the film). At the upper end of the holding column 110, extending inwardly,
A roller mounting bracket 112 is attached, and the bracket 112 holds the roller means 102. Because of this structure, by moving the holding column IIO up and down,
windows 99 of heating means 101 and roller means 102;
The vertical position relative to 100 (and thus relative to the side wall 41 of the tray 11 of the passing package 10E) can be adjusted. The roller means 102 has a mounting body 115 placed on a mounting bracket 112 and a swing arm 1 mounted on the body 115.
16 is placed so as to be able to swing about a vertical axis, AA, and the swinging arm 116 holds a side roller 118 so as to be able to rotate about a vertical axis, AR. Installation is body 115
has a bottom body 119, on the bottom body 1.19 there is a swinging arm 116.
A stop 120 is attached to limit the swinging of the. The pressure body 119 has a pivot shaft 1 extending vertically upward.
21 is attached. The swinging arm 116 has an upright boss 1.22 extending upwardly therefrom, in which a common hole is made in the boss and said arm, which hole fits rotatably around the pivot river (121). Therefore, the swinging arm 116 can freely swing around N+xzt within the range limited by the stop body 120.
At 16, a stop protrusion 124 engages a stop 120 to limit inward rocking of the arm 116. The mounting hole 115 further has a spring mounting hole 125, and the spring mounting hole 125 is fixed to one end of the shaft 121 protruding above the boss 122 of the swing arm 116. For spring attachment, one end of a coiled torsion spring 126 is pinned to the spring 125, and the other end of this spring is attached to the swing arm 116.
Therefore, the swinging arm 116 is constantly pushed toward the roller window 100 in the guide plate 95. The bottom body 119 of the support body 115 may be adjustably mounted to the roller mounting bracket 112 on the post 110, so that the innermost swing position of the swing arm 116 may be adjusted as desired. The amount of spring tension applied to rocker arm 116 by torsion spring 126 may be adjusted by simply rotating the spring mounting body 125 on shaft 121 and then resecuring it in position. As shown in FIGS. 12 and 14, the roller 118 has a predetermined height hEIR and a diameter "SR" and a diameter dBR.
V: is defined and has a height "V" to minimize deflection of the side wall 41 due to products 12 of various sizes and shapes being packaged.
Typically, the SR is defined so as to cover the entire skirt portion 72 of the film 14 and further overlap with the second adhesive WP. When the decorative body 101 passes between the rollers 118, the skirt portion 72 touches the side wall 41. pressed against. The roller 118, like the roller 81, is made of a material such as Teflon.
Made of non-stick material. FIG. 17 shows the control circuit 1 for the skirt gluing location 34.
: Indicates 0. Conveyor! The g-motor 92 is 240■
Power is received 5 from the power supply via the main switch PEI, the normally open contacts MOR2 to MOR4 of the main control relay MOH, and the fuse SF. Control subcircuit 132 receives gravity via step-down transformer TR and is energized via switch R13. The subcircuit 132 includes a normally closed stop switch FB-1 and a normally open start switch F.
B-2 and normally closed contact TD of time difference relay TDR
Coil MOR-0 of main control relay MOH is energized via R-1. A normally open contact MOR-1 in series with normally open contact 5c-1 forms a holding circuit for the current through switch PB-2. Contact point 5o-1 is heat shrinkage location 2
9 is controlled by a suitable relay (not shown) to remain closed as long as the heat shrink station is activated. The time difference relay TDR is controlled by a detection switch Ds,
The detection switch DB is attached to the package 10E at the adhesive means 940.
will remain closed as long as it exists. When the switch DS is closed, the timing cycle of the time difference relay TDR is started. This timing cycle is such that as long as the package is passing through location 34 at normal speed, the supine body releases switch DB, allowing it to open, and relay TD
It is determined that the timing cycle is interrupted before R times out. If the package becomes stuck in location 34 and cannot pass through this location at normal speed,
Switch DS is left closed and - relay TDR
timeout, which causes contact T
DR-1 is opened and cannot control the main control relay IACR. As soon as the sticking is cleared, relay TDR is reset and operation of location 34 is resumed. Coil PR-0 of power relay PR is energized by subcircuit 132 via overheat start switch H8, normally open contact MOR-5 of relay MOH, and normally open low-pressure switch LP. The switch LP is operatively connected to a source of pressurized air to the heating means 101 and remains closed as long as the air pressure is sufficient (usually about 0.7 kEVcm2) to prevent burnout of the heating element. The heating elements 131 in each heating means 101 are individually controlled. That is, the heating element 131-1 has a 240V power supply, a double fuse 8F1 from the source, and a power relay contact pH
-3, PR,2 and the adjustable temperature controller TO1, and the heating element 131-2 is supplied with a double fuse SF.
, normally open contacts PR-3, PR-4 and an adjustable temperature controller TO2. Each controller To has a potency 9 meter AP for varying the voltage;
As a result, the temperature generated by the heating element 1310 can be changed. -As you can see from the above, the skirt attachment location is usually
Continuous operation begins as soon as the operator closes switches PS, R8, H8 and temporarily closes starting switch PB2. When relay TDR times out due to sticking, 1. Relays MOR and pR are deactivated and operation of location 34 is stopped. Additionally, the power relay PR is deactivated when the air pressure is no longer able to prevent the heating element from burning out. As is clear from the above description of the skirt bonding location 34, the skirt portion 72 of the film 14 passes just inside the guide plate 95, and thus the guide plate 95 and the primary bond W
P keeps the skirt portion 72 in contact with the side wall 41;
In this state, the skirt portion 72 first goes to the heater window 990. The heating means 101 is adjusted such that a stream of hot air is directed towards and heats the skirt portion 72. Typically, the length of the long axis of the air horn 107 is determined by the length of the skirt portion 72.
It is rotated at an appropriate angle to the vertical to better cover the skirt with hot air. Typically, the temperature of the air exiting the heating means 101 is approximately 1,
200-i, as. F (6so~730°C), thereby the skirt portion 72 is heated to approximately 122~133°C (250~270F).
is heated to. After the skirt part 72 has been heated by the heating means 1.01, it is moved to the window 1000 for the rollers, where the roller 118 is moved to the window 100 by the spring 126.
It is pushed out and brought into contact with the skirt portion 72. The height h8R of the roller 118 is determined so that the entire skirt portion 72 is engaged with the roller 118 and pressed against the side wall 41, and thus the skirt portion is adhered to the side wall. This adhesive action forces the skirt against the side wall 41 and flattens it, thus increasing the transparency of 72. Typically, the height of the roller ~R is determined by the roller's primary adhesion W.
It is sufficient to overlap P and the skirt portion 72 extending below it. By this adhesion, the -next adhesion WP is attached to the side wall 41.
Therefore, even if the adhesive WP is heated by the heating means 101 to a temperature sufficient to weaken the adhesive WP, this helps prevent the adhesive WP from weakening. Further, the side bond BB does not need to be a one-fiber cut bond 1. This is because the original purpose of the side adhesive B8 is to keep the skirt portion 72 in contact with the side wall 42 and below. Typically, the height h of skirt adhesion (side adhesion) Bs
8E is 25 to 38 mm (1 to 1 mm) as shown in FIG.
5'). Although not required, the fiber tear strength achieved during skirt bonding helps to increase the overall strength of the interface between the film and the tray, thereby improving the integrity of the package. (sexuality) is enhanced. In general, the secondary bond WP needs to be a K, strong I fiber break bond 1 to prevent the film 14 from separating from the side walls 14 of the tray, thus preserving the integrity of the packaging. Furthermore, during the second adhesion WP, the film 4 is required to be substantially in the same plane as the outer surface 51 of the side wall 41. This is because the possibility of bond failure is minimized if the primary bond WP is substantially in the same plane as the plane of the bond.18 Typically, a preferred primary bond WP is a film 14. is obtained by pressing the side wall 4 to the side wall 41, and when the side wall 4 is made of corrugated paperboard,
It is necessary to compress the waves by about 1.6 mm (1/Is"), which typically requires about 0.7 to 1-Okg/cm2
(10~t5pst) pressure is required. The heaters 58, 59 typically operate at about 126-150°C (260-300°F) while pressing the film onto the tray.
) depending on the temperature. Good adhesion is obtained by maintaining such conditions for about 3-4 seconds. In this way, the basic packaging integrity (firmness) is obtained by the secondary adhesive WP, and the edge adhesive BE for adhering the edge 71 of the film 14 to the outer surface 52 of the end wall 44.
1 and the side adhesive B for adhering the film to the outer surface 51 of the side wall 41, the fiber tear adhesive 1 is not required. This is because they do not carry a -order charge and therefore there is no need to heat the film in these areas to the 1ff temperature required for -order adhesion. However, if these edge bonds BE and side bonds Bs are "R fiber break bonds 1", the overall package integrity is increased. Immediately after, the edge 74 of the film is heated to 111-122°C (230-122°C).
250'F). Skirt portion 72 of film 14 typically includes heat shrink location 29
is not heated to the bonding temperature and therefore the primary bond Wp is not weakened during heat shrinkage. The heating means 101 heats the skirt portion 72 to 122 to 133°C (25°C
0 to 270'F), but only by bending the skirt 72 to apply heat to a small area before the skirt 72 is pressed by the rollers 118. In this way, by compressing the skirt adhesive 2 after heating, the adhesive W is compressed when the narrow bag passes through the heating means 101.
Even if each part of P is temporarily raised to the bonding temperature, the adhesive WP is prevented from deteriorating. The side rollers 118 also typically have a diameter of about 0.14 to 0.15 mm.
By applying a compressive pressure of 35 ki'i/'Om2 (2 to 5 pBi), adhesion between the skirt portion 72 and the side wall 41 of the tray is ensured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the order of manufacturing the thin bag body of the present invention;
Fig. 2 is a plan view of the apparatus for manufacturing the upright body of the present invention, Fig. 3 is a side view of the above-mentioned apparatus, and Fig. 4 is a perspective view of the tray used in the packaging body of the present invention and its material. , FIG. 5 is a perspective view of the supine body after the film has been adhered to the tray, and FIG. 6 is the film. Figure 7 is a perspective view of the packaging body after the edges have been bonded, and Figure 8 is a perspective view of the upholstered body after the skirt has been bonded. Figure 9 is an explanatory longitudinal sectional view of the pressing and bonding location, Figure 1O is an enlarged partial sectional view of the heater for primary bonding, and Figure 11 is an enlarged partial sectional view showing the end bond being made. Figure 12 is an enlarged partial sectional view showing the skirt adhesive being made, Figure 13 is a side view of the skirt adhesive means, Figure 14 is a plan view of the adhesive means, and Figure 15 is the same as Figure 13 and Figure 15. Line 1 in Figure 14
5-15, Figure 16 is a cross-sectional view of Figure 13 and Figure 1.
4 is a sectional view taken along the line +6-161'c in FIG. 4, and FIG. 17 is a wiring diagram showing the electric circuit for the skirt adhesive means. DESCRIPTION OF SYMBOLS 10... Box body, 11... Tray, 12... Product, 14... Film, 20... Packaging device, 21...
- Supply location, 22... Adhesion location, 26... Delivery location, 28... Transfer location, 29... Contraction location, 30
... End bonding location, 31... Cooling location, 32... Rotation location, 34... Skirt bonding location.

Claims (1)

[Scope of Claims] 1) a cellulose tray having a bottom wall and a pair of upright side walls spaced apart along both sides of the bottom wall; a group of products; a pliable film overlapping the group of products and overlapping the walls of both sets 11 of the tray, the film car first being glued to the outside of the side walls; An unbonded skirt portion is left between the bonded portion and the edge of the film, and after the first bonding, the unbonded skirt portion is thermally bonded to the side wall, so that the skirt portion is attached to the side wall. 2) The first adhesion connects the film to the side wall and the strong fiber tearing material. A multi-product package according to claim 1, formed by pressing the package against said side wall while heating for a time sufficient to form a bond. 3) The film is heat-shrinkable, and the film is
2. A multi-product package for ships as claimed in claim 1, wherein after formation of said first bond, said products are heat-shrinked over said products, thereby locking said products in position in a tray by said film. 4) A multi-product package according to claim 3, wherein said skirt adhesive is formed after heat shrinking of said film. 5) the cellulose tray has a pair of spaced upright end walls along opposite ends of the bottom wall, the film further overlapping at least a portion of the end walls; 2. A multi-product package according to claim 1, wherein the portion of the film overlapping the end wall is adhered to said end wall. 6) The film is heat-shrinkable, and the film is
3. A multi-product package as claimed in claim 2, wherein after formation of said first bond, said products are heat-shrinked over said products, thereby locking said products in position in a tray by said film. 7) the cellulose tray has a pair of spaced upright end walls along opposite ends of the bottom wall, the film further overlapping at least a portion of the end walls;
7. The multi-product package according to claim 6, wherein the portion of the film overlapping the end wall is adhered to the end wall. 8) A multi-product package according to claim 7, wherein said skirt adhesive is formed after heat shrinking of said film. 9) The multi-product package according to claim 8, wherein the end bonding is thermal bonding, thereby increasing the transparency of the portion of the film that is in surface contact with the end wall. 10) A method of manufacturing a multi-product package, comprising: a) moving an open-topped cellulose tray having a pair of upright side walls on opposite sides and containing a group of products along a predetermined path; b)) Place the film on the product in the lay; C) While keeping the film on the product in the tray, glue the film to the outside of the side walls of the tray, between the glue and the edge of the film. leaving an unbonded skirt - then d) thermally bonding the skirt of the film to the outside of the side wall of the tray to bring the skirt into surface contact with the outside of the side wall, thus increasing the transparency of the skirt ; a method consisting of; 11) A claim in which said step C) is carried out by pressing said film against said side wall while heating for a period of time sufficient for the material to form a strong fiber break bond with said side wall. The method according to item 10. 12) The method according to claim 10, wherein after the above operation C), an operation of heat-shrinking the film is further performed. 13. The method according to claim 10, further comprising the step of adhering a portion of the film overlapping the end wall of the tray to the end wall. 14) The method according to claim 11, wherein after the above operation C), an operation of heat-shrinking the film is further performed. 15) The method according to claim 14, further comprising the step of adhering a portion of the film overlapping the end wall of the tray to the end wall. ! 6) After the above operation C] and before the above operation d), an operation of cooling the film is further performed.
The method described in Section 5. 17) A method according to claim 16, characterized in that, before said operation d), an additional operation is carried out for rotating the tray so that it moves along its longitudinal axis. 18) The above operation d) reduces the skirt portion of the film by approximately 11
Heat to a temperature of 1 to 122 degrees Celsius (230 to 250 degrees Fahrenheit), approximately 0.14 to 0.35"'10rl'l" (2 to
18. The method according to claim 17, comprising an operation of pressing against the side wall of the tray with a pressure of 5 pθ1). 19) In an apparatus for producing multi-product packages from open-topped cellulose trays containing products and films having a pair of upright side walls on opposite sides, the trays containing the products are placed in a predetermined path. conveyor means for moving the film along the products in the film tray; unwinding means for moving the film along the products in the film tray; heating means for heating the portion of the film that is in surface contact with the side walls under a predetermined pressure for a predetermined period of time to cause the fibers to break and adhere to the side walls;
a separating means for separating the film between the trays to form an unbonded skirt along both sides of the film and below the thermally bonded portion; thermally bonding the skirt portion of the film to both side walls of the tray; , and skirt adhesive means for increasing the transparency of the film.