JPS58171346A - Bag with hanger - 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 a thermoflexible bag that can be hung filled from a bag board display in a supermarket.

In particular, the present invention relates to heat-shrinkable and side-sealed thermoplastic bags used for the packaging of processed meats and cheeses displayed for retail sale.

In retail stores and supermarkets, many processed meat and cheese packages are hung on veg boards for easy viewing by customers. There are many different ways in which it can be hung. Straps or hooks that can be secured to the fully wrapped package at the retail store can be used, for example a strip of semi-rigid plastic with a hook at one end, or alternatively a cone to hold the filled bag. Or you can use a cutout pattern that can be shaped into a strap. Another type of hanging configuration is to drill holes at either end of the bag and
This consists of reinforcing this hole with a metal or plastic eyelet to provide a sufficiently strong suspension means. Yet another configuration is a loop or "strap" that is welded to the bag as it is formed. It is this most invasive configuration that the present invention is concerned with.

H, L, F armo published September 21, 1965
U.S. Patent No. 32,073'00 to R discloses a heat-sealable, heat-shrinkable plastic film wrapper surrounding an item and a strip each secured within the wrapper within the heat seal. A labeled package containing a half-sized product is shown having a printed label of a narrow strip of heat-sealable and heat-shrinkable plastic film extending across the product at each end. There is. However, the strip contracts with the wrapping material and does not form a loop to form a hanging strap. Accordingly, one object of the present invention is the combination of a package having a shrinkable wrapping material and a non-shrinkable strip or strap that can be used for hanging.

For packaging many foods, especially fresh or processed meats, it is particularly desirable to use packaging materials with low oxygen permeability. For one such material, 19
No. 3,741,253 to H2S, Brax et al., issued June 26, 1973. This B
The Rax et al. patent describes a color film having a first layer of crosslinked ethylene vinyl acetate copolymer that is extruded and coated with another layer of ethylene vinyl acetate copolymer.

If the strap is welded to a single layer of non-crosslinked vinyl acetate polymer, the B r
When using bags made from Fill 4, which is a U.S. patented material such as AX, the fat may attack the seal on the strap, causing it to break quickly or causing the filled bag to hang from the strap. It was found that there was a risk of damage during the *understanding period. It is therefore another object of the present invention to provide a bag with hangers that can be used with fat-containing products and that can be hung for extended periods of time on retail display.

These and other objects will be better understood upon consideration of the summary of the invention, the drawings, and the detailed description below. .

In one aspect, the invention is a hanger bag having a bag portion including front and back panels made of multi-layer heat-shrinkable thermoplastic sheet material, wherein at least two layers of the multi-layer material Extruded together, said panel consists of one folded sheet such that the folded portion constitutes the bottom of the bag, and eleven sections on each side of said panel are separated from each other in parallel side seals. a strap of heat-sealable material that is not heat-shrinkable, sealed against one green part and leaving an unsealed side defining the top of the bag with an opening for filling goods into the bag; , one end of this strap is sealed against the seal on one side and the other end is sealed against the seal on the value side, so that when the bag is heated and shrinks, the bag will close to the strap. A strap is formed so that it folds and contracts to form a loop for hanging the bag.

In another aspect, the invention does not require that two of the layers of the multilayer film be extruded at the same time, but that the straps are made of superimposed strips of heat-shrinkable and non-heat-shrinkable materials. A removable strip of material is attached to a bag with a handle next to or in contact with the bag.

In yet another aspect, the invention provides an article of manufacture and a PiIli! a multi-layer, side-sealed thermoplastic bag that is shrunk into a thermoplastic bag, the material from which the bag is formed comprising a multi-layer film with at least two layers simultaneously extruded and heat-sealable; a hanging loop comprising a non-heat shrinkable strap of thermoplastic material, one end of said strap being attached to the outer surface of said one layer of co-extruded material at one of said side seals. and the other end of the strap is sealed against one outer surface of the coextruded layer at the other side seal.

In yet another aspect, the present invention relates to a method for carrying bags, the method providing a heat-shrinkable thermoplastic tubular material in a flat state, the tubular material being formed from a variety of materials. and the layer constituting the outer surface of the tubular material is extruded at the same time as its adjacent layer, and the layer forming the outer surface of the tubular material is extruded at the same time as its adjacent layer, and the flat tubular material is formed at or adjacent one longitudinal edge. and overlapping a strip of non-shrinkable material on the tubular material, the tubular material and the combined strip being spaced parallel to each other along the length of the tubular material. 2 with a par 7 oreshicon in the hole
said flat tubular material being sealed together with said sealing means and to said strip by passing said flat tubular material through sealing and perforating means arranged to form two continuous transverse seals; and sealing the strip to each side seal having a bar 7 orifice in the seal bar to form a side seal bag.

The invention will be better understood by examining the drawings.

In FIG. 1, a flat tubular material 2 is shown being guided on guide rolls 3 past a sealing perforator 4. In FIG. Preferably, this flat snow-like material is made from a multilayer thermoplastic film of low oxygen permeability; one such film is described in the aforementioned U.S. patent of 3 Rax et al. . Another preferred film is that a substrate of ethylene vinyl acetate copolymer containing about 9% vinyl acetate is extruded or heated and cross-linked by spraying to form two simultaneously extruded layers. It is coated using an extrusion method. These two layers, melted simultaneously and extruded 1 m above each other, form one -
It is very similar to the extrusion coating method. The two co-extruded layers making up the extruded coating are a single layer of vinylidene chloride copolymer as disclosed in the Brax et al. patent, and an ethylene vinyl acetate copolymer containing about 9% vinyl acetate. − is. A layer of vinylidene chloride copolymer is in contact with the substrate, and a layer of ethylene vinyl acetate copolymer is present on the outside. Thus, considering FIG. 1 again, the outer surface of the flat tubular material 2 is made of non-crosslinked ethylene vinyl acetate copolymer, and the inner surface of the tubular material 2 in contact with each other is composed of end bridges. Consists of a bonded ethylene vinyl acetate copolymer. This tubular material is preferably incised at the side green opposite from where the strip 8 is fed from the roll 7; this incised edge will of course provide a mouth or opening in the finished bag. Cutting devices are well known in the art and are not shown in the text.

When the cut tubular material enters the sealing device, a strip of strap material 8 is threaded onto the top surface of the tubular material. This strip material 8
The material is preferably made from a low density polyethylene or ethylene vinyl acetate copolymer and is not subjected to any orientation or tensile treatment to cause it to undergo any degree of heat shrinkage.

This material must, of course, be a heat-sealable thermoplastic material and can be sealed together with the tubular material in the sealing and piercing device 4. The typical width of this strapping material is 2
5 cm (ie, approximately 1 inch).

The width of the flat tubing will vary depending on the product to be architrazed into the finished side seal bag, but typical widths of the flat tubing are 25 to 30 mm (1,0 mm). No!! 1.2 inches).

The sealing portion M4 may be any commercially available sealing and cutting device. These are well known in the art and typically seal when the opposing members of the sealing device 4 are pressed together via the strap 7 onto the tubular material when a current pulse is applied. Consists of electrical resistance wire that is heated to a concentration.

In fact, this sealing device 4 has two sealing wires forming a separated seal 5, and furthermore, said sealing device has a perforation 6 in a flat tubular material 2 and a strap 8.
It has a punching device that punches holes in the hole. These perforations typically range from 63.51 to 7651 m (2,5
(3 to 3 inches) - the residence time when the sealing member is closed to form a side seal - is on the order of 1.4 to 1/2 seconds. In FIG. 1, after the sealing and piercing operations have been performed, the sealing device 14 shows a flat side seal that still adheres to the subsequent bag being formed.
Bag 9 is provided. Side-sealed bags are generally considered to be sealed on at least one side by a seal and the bottom formed by a fold.

In Figure 12, the side seal bag 9 has been separated from the pouch material and is ready for filling. Filling can be accomplished manually or by any means, and involves inserting a wide variety of products, especially food products such as meat and cheese, into the mouth of the bag at the end opposite the strip 8. I can do it. In the typical case described below, 500g of processed meat, such as sausage, is placed in a bag, the bag is evacuated by means well known in the art, such as by vacuum@stomach or vacuum nozzle extraction.
The opening of the bag is heat sealed. One suitable machine is W. R. Grac of Duncan, South Carolina, USA.
e&Co, Cryovac [) 1vls -1
There is a model 8300 rotary vacuum generator commercially available from On. A heat seal similar to that produced by the ll1l sealing device 4 can be used or metal clips can be used. After the final closing seal has been carried out, the filled bag shrinks the unsealed bag 9 so that it sticks to the same curve of the piece of meat by about 85°! ! It is only necessary to immerse it in hot water heated to within the range of 96°C (185°C to 50°C), and the resulting package forms a loop 8 for the purpose of hanging the strap material 8 due to the contraction of the bag 9. It has the appearance shown in FIG.

In FIG. 4, a display beg board 10 is shown having begs 11 from which loops 8 hang filled bags or packages 9, which are common in many supermarkets.

When a single layer strap is attached to a multilayer bag material that is not extruded simultaneously, fat from the filled product can erode the strap seal at a high concentration, such as a heat shrink concentration, causing the outer layer of the bag to erode. It has been found that there is a risk of causing the person to separate from the kan.

Surprisingly, it has been found that this co-layer problem can be solved by coextruding at least two layers of the multilayer film from which the bag is formed. One of these layers is the layer to which the ends of the strap 8 are heat sealed.

In a test to determine the authenticity of the hanging loop of the present invention, peanut oil was applied to the inside of the bag before packaging the meat, and then the bag was suspended by the loop at a temperature of 32°C. Bag configurations that were not co-extruded were found to fall off either immediately or after a gander period in this test using 50og of product. Meanwhile, bags containing 500 g of meat pieces in a coextruded configuration were suspended by straps at relatively low density (8° C.) and room temperature. It remained suspended on the hanging fence until the 30th, but no problems occurred.

In addition to the discovery that the coextrusion structure described above significantly eliminates the break-through of the strap, approximately 50 sv (2 in. ) It has also been found that a satisfactory handle bag can be obtained if a non-shrinkable strap is welded to the top of the shrinkable film after the relatively wide strip has been installed. It has been theorized that a wide band of shrinkable film that shrinks with the tubular material from which the bag is formed will distribute the forces acting on the straps over a relatively long distance of the outer layer of bag material.

This kind of structure is made up of two parts of the strap material 8 from the roll 7.
It can be constructed as shown in Figure 11 by adding two strips of material. Item 2 (■) is a non-shrinkable material that becomes the hanging loop. As previously mentioned, these two layers of strapping material 8 are applied in the same way as a single layer, but upon shrinking the collapsible material will shrink with the bag material and the non-shrinkable material will not, thus unlike the previous example. Form a hanging loop like this. The width of the hanging loop will be 25 meters as before, and the length of the shrinkable film will be approximately 2 inches.

As mentioned above, one of the practical objects of the present invention is to provide a bag with low airtightness, the materials of which are both heat-shrinkable. Hydrolyzed ethylene acetate when used as one layer in a multilayer film.
The copolymer seals against gas permeation, creating excellent resistance, and B
In the U.S. patent of rax et al., vinylidene chloride copolymer is l! Single layer films of vinylidene chloride copolymers are said to provide excellent resistance to the permeation of gases and other gases without compromising the resistance necessary to withstand commercial distribution. Thus, while the Brax et al. patent describes the discovery of multilayer films comprising a single layer of vinylidene chloride copolymer in a unique combination of heat-shrinkable and rough-handling resistant materials, in the present invention Brax et al. Although it is desirable to use multilayer films such as those described in the patents of E. et al., the addition of strapping material to such multilayer films in high speed bag manufacturing processes may cause the fat-containing product to shrink at high concentrations when packaged within the bag. When forced to do so, the result is an unacceptable defect rate.

A solution to this problem, which can be expected to occur in other multilayer films used for example in raw meat, m-meat, in curing and for architravel of fat-containing foods such as cheese, is described in the text. , Rhyme - is summarized in the claims.

[Brief explanation of the drawing]

811111 is a diagram illustrating a method of forming a partially sealed bag with a hanger from a snow-like material and a strap material, FIG. 3 shows a filled and deflated bag according to the invention showing the unshrunk hanging loops, and FIG. 4 shows a package according to the invention displayed on a Veg board in a retail supermarket. . 1... Roll, 2... Tubular material, 3... Guide
Roll, 4... Sealing and perforation device, 5... Seal, 6
...Perforation, 7...Roll, 8...
Strap, 9... Side seal bag, 10...
Beg board. Patent applicant W.R. Brace &
company

Claims (1)

[Claims] 1. A heat-shrinkable bag with a hanger having low oxygen permeability, including (a) a bag portion, the cough bag portion having (1) a multilayer structure having at least two layers extruded at the same time; front and rear panels made of heat-shrinkable thermoplastic sheet material, (r+> said panels consisting of a single sheet folded to form the bottom of said bag; (iii > Both sides of each of said front and rear panels are sealed along its side weavings to the corresponding sides of the other panel resulting in parallel side seals and the top side is unsealed. (b) providing a strap made of a non-heat-shrinkable sealable material, one end of the strap being The bag is pierced against one side seal and the other end is sealed against the other side seal, causing the bag to shrink away from the strap as it heats up and contracts. A bag with a hanging handle, characterized in that the strap is formed into a loop for hanging the bag. 2. The multilayer film of the bag is composed of three layers, and the layer forming the inner surface of the bag is structurally bonded. wherein the middle layer is a vinylidene chloride copolymer and the outer layer is an ethylene vinyl acetate copolymer, said middle layer and outer layer being co-extruded onto said inner layer. 3. The bag with a hanger according to claim 1, characterized in that the strap is bent adjacent to the bottom of the bag. Bag. 4.1ljllll!':''A heat-shrinkable bag with a hanger having low permeability: <8) A bag portion is provided, and the bag portion is made of (1> multi-layered heat-shrinkable thermoplastic sheet material. (+;) said panel consisting of a single sheet folded to constitute the bottom of said bag; (iii) both sides of each said panel An opening in the bag is sealed against the other panel along a side green in each opposing position to provide parallel side seals, leaving the unsealed sides open for filling goods into said bag. - or (b) providing two mated straps, one heat-shrinkable and the other non-heat-shrinkable, said heat-shrinkable strap being in contact with a surface of said bag; Bubbles,
Thus, when the bag is heat-shrinked, the shrinkable straps shrink together with the bag away from the non-heat-shrinkable straps, thereby forming a loop for hanging the bag. A unique bag with a hanging handle. 5. The bag with a handle according to claim 4, wherein the strap is arranged adjacent to the bottom of the bag. 6. providing (a) a product; and (b) a heat-shrinkable thermoplastic bag having side seals and contracted around said product, the material of the cough bag comprising at least two co-extruded parts; (C) a hanging loop of non-heat shrinkable thermoplastic material, one end of the cough loop being sealed against one side seal and the other end of the loop being sealed against the other side seal; A package for hanging display, characterized in that it is sealed against a side seal. 7. The material from which the side seal bag is formed consists of at least three layers, at least two of the layers being extruded simultaneously, and at least one of the layers being vinylidene chloride copolymer and hydrolyzed ethylene vinyl acetate. - Package according to claim 6, characterized in that it is selected from the group consisting of copolymers. 8. A package according to claim 6, characterized in that the product is selected from the group of foods consisting of raw meat, smoked meat, cured meat and cheese. 9. The package of claim Ill No. 611, wherein the hanging loop is located adjacent the bottom of the bag. 10. (a) an item; (b) a thermoplastic bag having side seals and contracted around the item, the material from which the bag is formed comprising multiple layers of thermoplastic material; (C) a heat-shrinkable strap whose ends are sealed to opposing side seals of said bag and shrunk with said bag; a non-heat shrinkable strap made of a plastic material, one end of the strap being sealed against one side seal and the other end of the strap being sealed against the other side seal. A package according to claim 1, wherein the non-collapsible strap and the collapsible strap end are sealed together, thereby providing a hanging loop for the bag. 11. The package of claim 10, wherein a collapsible strap and a non-collapsible strap are located adjacent the bottom of the bag. 12. The package of claim 1011I, wherein the product is selected from the group of foods consisting of raw meat, smoked meat, cured meat, and cheese. 13. (a) providing a flat heat-shrinkable thermoplastic tubing, the cough tubing comprising at least two co-extruded tubes;
(b) cutting said flat tubular material along one of its green areas; (C) overlaying said tubular material with a strip of non-shrinkable material; (d) passing the tubular material and the swollen strap material through a sealing and perforating device to form a continuous seal across the width □ of the tubular material, the seals being parallel to each other; (e) adding said sealing device to form a side-sealed bag having strap material sealed at the side-seals. 14. The method of claim 13, including positioning a strap adjacent an end of the bag and away from the opening.