FI97462C - Paper bag with integral carrier - Google Patents

Abstract

Paper bag with integral carrying device consisting of two main panels (2,1), two side panels (3,4), a bottom panel and a top panel, whereby the integral carrying device is formed by folding over extensions of said main panels and by punching a carrying hole (18) in said folded-over extensions of said main panels. <IMAGE>

Description

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The present invention relates to a paper bag comprising a carrier integral with the structure. More specifically, the invention relates to a paper bag comprising a carrier in which the carrier is made as an extension of the top of the bag and the top is closed before the bag is filled through its bottom with a certain amount of goods. After filling the bag, the bottom part is also closed.

Paper bags comprising a carrier, for example paper bags with a double carrying handle, are commonly used. Such paper bags usually have an open top, but some bag structures may have an extension that can be turned over the bag when the bag is filled. Such paper bags (paper bags) are mainly used in stores so that customers can carry the goods they buy home in them. They are not suitable for the packaging and sale of goods which are marketed in a certain pre-packaged quantity.

To eliminate this problem, paper bags have been developed in which a carrier opening, possibly with reinforcement, is arranged on opposite sides of the bag near the edges of the open end of the bag and the open end is closed after filling, for example by sewing, stapling or gluing the entire width of the bag open when using the contents of the bag. Such bags are used, for example, for pet food, kis-30 sand, etc., but their disadvantage is that they are no longer easy to carry from the carrying openings after they have been opened. In addition, the filled and sealed package is not an optimal, space-saving form of packaging, as the product in the package tends to descend and the extension with the carrier opening is upright on top of the bag which is sealed down.

GB patent application 8923835.6 discloses a package which is a paper bag in which tightly compressed flexible products are packed, the package comprising an opening device and also a carrier formed as an extension of the upper surface of the package. However, a disadvantage associated with this carrier is that, in order to avoid rough edges which make it more difficult to carry the bag 10, the protective part is pulled over the free upper edges of the carrier and fastened, for example, by sewing. As a result, the bag becomes even more expensive due to both the additional material and the additional manufacturing step, which requires additional equipment and requires additional time.

15 German Utility Model G 8905480.6 describes how a paper bag is folded and closed at the top and how a separate piece of material with a carrying handle is glued to the center of the newly formed top side of the bag. This is a relatively expensive way to solve the portable device problem, as it requires additional action when the top of the bag is closed with a conventional device and also with an accessory.

It is clear from the above that it is therefore necessary to find a way of equipping paper bags with a carrier that can be manufactured economically, easy to handle on a packaging line that is not upright and in the way when filled paper bags are delivered and stored and that is comfortable to handle and use. even after the paper bags have been opened to access their contents.

In view of the above, it is a main object of the present invention to provide a carrier for a paper bag which is commonly used in the sale of a particular pre-packaged consignment.

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Another object of the invention is to provide a carrier device which is integral with the paper bag structure and which can be formed during the manufacture of the bag.

It is also an object of the invention to provide a carrier which can be easily folded for transporting and storing the product.

It is a further object of the invention to provide a carrier for a paper bag which is convenient in use and still acts as a carrier after the paper bag has been opened.

It is a further object of the present invention to provide a folding pattern for a material blank used to make a paper carrier comprising a solid carrier that allows a partially preformed bag to be easily preformed and opened prior to packaging the products through the base. fixed-20 handle.

In order to achieve the above objects, the present invention provides a flattened tube for forming a paper bag comprising a carrier integral with the structure, which flattened tube 25 is characterized by what is set forth in the characterizing part of claim 1 and a paper bag made from the flattened tube of claim 10.

Although claims are set forth at the end of this specification, in which the present invention is described in detail and the claims are clearly specified, for ease of understanding, the invention will now be described with reference to the accompanying drawings, in which Figure 1 shows a flat blank for a paper bag structurally integral therewith. Figure 2 is a perspective view of the bag blank of Figure 1 when folded and glued into a tube, Figure 3 shows a bag tube formed as shown in Figure 2, cut into a pre-foldable carrier according to the invention, Figures 4 and 5 are perspective views of the first two -10 for folding the top of the bag tube according to Fig. 3 into a carrier, Fig. 6 shows the next step in which the reinforcing tube and also the reinforcing part are placed according to Fig. 3. n Fig. 7 shows how the three parts of Fig. 6 are folded on top of each other and assembled, Fig. 8 shows a finished paper bag with a structurally integral carrier consisting of three parts shown in Fig. 6, Fig. 9 shows another the structure of the reinforcing sheet and the reinforcing part which can be attached to the partially folded top of the bag tube of Fig. 3, Fig. 10 shows how the three parts of Fig. 9 are attached to the top of the partially folded bag shown in Figs. 4 and 5 and folded towards and on top of each other; a paper bag having a carrier consisting of the three parts shown in Fig. 9 as an integral part; Fig. 12 shows yet another method of manufacturing a carrier according to the invention structurally fixed to the paper bag as folding and assembling steps after the working steps shown in Figs. I, 5 97462 Fig. 13 shows a finished paper bag with a carrier integral with its structure based on the details shown in Fig. 12, and Fig. 14 shows how a second paper bag 5 with a carrier integral with its structure can be attached to another paper bag to facilitate carrying them. or for assembly, for example in special offers.

In the drawings, in which the same reference numerals denote the same parts in all the figures, three preferred constructions of a paper bag with a carrier according to the present invention are shown.

The manufacture of these three carrier structures shown starts from the material blank 100 shown in Fig. 1. The blank consists of main surfaces 1 and 2 and side surfaces 3 and 4. The side surface 4 has an adhesive strip 5. Fold line 6 shows where surfaces 1, 2, 3 and 4 continue as extensions 1a, 2a, 3a, 4a, from which the bottom of the bag is formed in the normal way when the bag is filled. The fold line 7 shows where the surfaces 20 1, 2, 3 and 4 continue as extensions Ib, 2b, 3b and 4b, and the extensions Ib and 2b in turn continue over the fold line 8 as extensions le and 2c, and the extension 2c continues over the fold line 9 as a final extension 2d. By folding the extensions Ib-2d as described below, three according to the invention are obtained. 25 structures.

Folding lines 7, 8, 9, or the other folding lines mentioned below need not appear in the paperboard blank before starting the folding and assembly work steps with conventional equipment, but are shown here because the various work steps involved in the paper blank are easier to describe later. The fold formed along the fold line shown in the blank is shown as a solid line in the perspective views, but has the same reference numeral.

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Figure 2 denies the conventional method of performing the first step in the manufacture of the bag. This is done by folding the bag along the fold lines 10 and 11 and fixing the overlapping strip 5 against the free end 5 of the main surface 1, whereby a bag tube is obtained.

Fig. 3 shows how the bag tube is formed as shown in Fig. 2 and shows sections 14, 15 made along fold lines 12, 13, 26 in the part separating the extensions Ib, 2b and 2b, 2c from the extensions 3b and 4b.

Figures 4 and 5 show how the bag tube (of which only the upper part is shown) is opened and made square so that the upper surface can be closed and a carrier formed. First, the extensions Ib and le are folded outwards 90 ° 15 and the extensions 2b, 2c, 2d are folded outwards likewise 90 °, but in the opposite direction. The fold lines 10 and 11 are pushed inwards until the side surfaces 3 and 4 form an angle of 90 ° with the main surfaces 1 and 2. The extensions 3b and 4b are then folded in 90 ° to each other.

As can be seen in Figure 6, the bag, the upper part of which is partially folded, is pressed flat along the fold lines 10 and 11 so that the extensions Ib and le are against the main surface 1, while the extensions 2b, 2c and 2d return to their original plane with respect to the main surface 2. The reinforcing tube 16 is then attached to the extensions 3b and 4b, thereby completely covering the upper surface of the bag, and the reinforcing member 17 is then attached to the extension 2c.

Fig. 7 shows a reinforcing tube 16 covering the upper surface of the bag and a reinforcing part 17 covering the extension 30c. The first extensions Ib and 2b are folded 180 ° and fixed to the tube 16, while the extensions le and 2c are folded upwards by 90 ° relative to the folded extensions Ib and 2b and joined together. Finally, the extension 2d is folded 180 ° and attached to the free surface of the extension 1e. The carrier hole 18 35 is pierced through the extensions le, 2c and 2d and the reinforcement strip 17 »·« 7 97462. Puncture can occur when the extensions are connected together, but it can also be performed on separate extensions and the reinforcement band before the assembly step. Figure 8 shows a bag comprising a carrier according to a first structure of the invention at the upper end of the bag.

As already mentioned, the first reinforcing structure of the carrier is provided by a reinforcing tube 16. Such a reinforcing structure ensures complete closure of the top surface 10 of the filled bag and further prevents detachment of the extensions le and 2c due to gravity of the filled bag when carrying the bag.

Figure 9 shows a different structure of the reinforcing sheet carrying handle and the reinforcing part 15. When the partially folded top of the bag tube is pressed flat as described with reference to Fig. 6, the reinforcing sheet 19 is attached to the extensions le ', Ib', 2b ', 2c', 3b and 4b. Thereafter, the reinforcing portion 20 is attached to the center portion of the extensions 2b ', e', d '20.

It can be seen from Figure 10 how the three parts of Figure 9 are connected together. Thereafter, the portions 21, 22 and 23 of the reinforcing sheet 19 attached to the extensions Ib ', le', 2b ', 2c', 3c and 4c as shown in Fig. 9 are folded 135 ° to each other and thus the portion 23 is folded again 90 °. to be fastened against the upper surface of the previously folded top 21.

Figure 11 shows the top of a finished paper bag with a carrier 30 according to another structure of the present invention. The carrier openings 24 are pierced through the extensions le ', 2c' 2d 'and the reinforcement strip 17. Puncture can occur when the extensions are connected together, but it can also be performed on separate extensions and the reinforcement band before the assembly step.

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In another preferred construction of the invention, the carrier is reinforced by a reinforcing sheet 19, whereby the upper end of the bag is completely closed after filling the bag and a tubular carrier 5 with double carrying openings is obtained, which makes it easier to carry the bag because of a bridge area 28 between the carrying openings 24.

Figures 12 to 14 show another particularly preferred structure according to the present invention, which has the advantage that two filled paper bags with a carrier integral to their structure can be conveniently joined together either to facilitate carrying or to be sold together in connection with special offers, for example.

After the folding operations shown in Figs. 4 and 5 have been performed, the bag tube is pressed flat as shown in Fig. 6. The reinforcing member 25 is attached to the extensions Ib ". Then the extensions 2b", c ", d" are folded 180 ° and the extensions 2b ", c" are attached to the extensions 3b "and 4b". The extensions Ib "and 2d" are then folded 90 ° towards each other and fastened to each other. Finally, the extension le "is folded 180 ° to be attached to the free surface of the extension 2d".

Fig. 13 shows the upper end of a paper bag according to a third structure of the present invention with a carrying device. The carrier opening 18 is perforated through the extensions Ib ", le" and t 2d "and the reinforcement strip 25. The perforation can occur when the extensions and the strip are connected together, but it can also be performed on separate extensions and the reinforcement strip before the assembly step.

Figure 14 clearly shows how the second bag of the third preferred structure is easy to carry with or attach to the first bag, for example in connection with special offers. The assembly can take place in one of the commonly used ways, for example by gluing, stapling or sewing.

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Paper bags with a carrier according to the invention integral to their structure can be made of several different grades of paper. Papers or composite paper layers with a total weight of 70 5 125 g / m2 have been found to be suitable. However, unbleached natural papers or unbleached recycled papers are most advantageous from an environmental point of view in the manufacture of paper bags having a carrier according to the present invention which is integral with their structure. The package made of Jot-10 unbleached papers is made to look comfortable, however, the outer surface of the papers must be coated with white, which gives it a high-quality print. It is known from experience that coating unbleached paper so that the pin-15 weave is well opaque presents difficulties because the paper must either be made of light fibers such as unbleached wood chips and / or coated with high basis weight paper. Both solutions are questionable because they reduce the good me-20 mechanical properties required when packaging co-compressed products in a paper bag.

For the above reasons, the best results have been obtained using a two-ply paper, one layer of which is a brown, unbleached kraft paper with good mechanical properties, and the other layer of light brown, unbleached wood sandpaper. As will be appreciated by those skilled in the art, such two-ply paper can be made on a two-wire or even more paper machine, with the power layer 30 in the final product inside the bag and a layer of sandpaper on the outside of the bag. Another possibility is that both layers are made separately and then glued together to obtain a laminate. It has been found that the adhesive laminate paper has the best technical properties required, for example when packing a compressed disposable material, while maintaining the environmentally friendly properties.

If a good printing surface is required for the bag, a layer of light-5 brown unbleached sandpaper may be light white coated paper. Another option is to use bleached paper with optimal environmentally friendly properties, for example partially oxygen bleached paper. When such paper is used, its outer surface does not need to be coated with white to form a good printing substrate.

A biodegradable and / or easily renewable material can be used as reinforcing parts. Such materials include paper, cotton, combinations thereof, and the like.

When it comes to joining extensions, surfaces and strips, it can be done in any conventional way such as glue, heat-sealing the appropriate coatings used in the printing step of paper blanks, and so on. It is highly recommended that the adhesive or heat seal varnish be biodegradable in composition.

Since the invention relates to the construction of paper bags. 25 tightly connected carriers, only the tops of the bags are shown. The bags preferably have opening / dosing devices which do not affect the operation of the carrier when emptying the contents of the bag. Highly suitable opening devices are disclosed in GB patent application 30 8923835.6.

Although, as shown with reference to Fig. 2, the first step in bag making is to attach the overlap strip 5 to the free end of the main surface 1, this bag tube can also be formed by dividing the blank 35 so that the overlap strip is formed at another location. The advantage of this arrangement, as shown in Fig. 2, is that a perfectly flat side surface is obtained, which facilitates the printing of the blank or the fixed connection of the opening / dosing device to the structure.

It will be well understood by those skilled in the art that the carrier devices integral to the bag structure shown in the three preferred structures described above can be easily pressed flat against the top surface of the filled paper bag 10 for transport and storage and easily returned to the carrier position if necessary.

Paper bags with a carrier according to the invention, which is inextricably linked to their structure, are very advantageous, for example, for packaging disposable nappies, although their use is not limited to this type of content. Until now, disposable diapers have mostly been packed in plastic bags or, in smaller quantities, in cardboard boxes. Plastic bags are not biodegradable and at least are not yet easy to renew, so packing disposable diapers in a paper bag is very advantageous. A paper bag comprising a carrier integral with the structure according to the invention can be filled in packaging machines which are currently used with carriers which are integral with the structure of the bag. 25 plastic bags with 25 devices, in which case the changes required for the machines are very small. In addition, the fold lines shown in the above examples can be easily replaced by the notch lines already made in the paper blank, so that the folding and squaring of the paper bag during the bag forming step is more efficient.

* Those skilled in the art will appreciate that various modifications may be made to the invention described above. Indeed, examples of some such variations have been presented above. Accordingly, the scope of the present invention must be considered within the scope of the appended claims, and it should be further noted that the invention is not limited to the details or structures described in the foregoing description and drawings.

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Claims (10)

A flattened tube for forming a paper bag provided with an integrated support device, said tube having a front main surface (2), a rear main surface (1), a left front and rear side surface (4 ', 4' ') and a right front and rear side surface (3 ', 3' '), wherein the side surfaces (3', 3 '', 4 ', 4' ') are connected to the main surfaces (1, 2) along vertical fold lines 10 (12, 13, 26, 27 ) over the entire length of the flattened tube, the left front and rear side surfaces (4 ', 4' ') being connected to one another along a vertical fold line (10) and forming the left vertical edge of the flattened tube, the right front and rear side surfaces (3 ', 3' ') are connected to each other along a vertical fold line (11) and form the right vertical edge of the flattened tube, a lower horizontal fold line (30) extending from the right vertical edge (11) to the The left vertical edge (10) over the front and rear main surfaces (1, 2), where at an upper horizontal folding line (7) extending parallel to the left horizontal folding line from the right vertical edge (11) to the left vertical edge (10) over the front and rear head faces (1, 2), four vertical cuts (14, 15) each of which extend on the bed sides of the main surfaces (1, 2) along the vertical fold lines (12, 13, 26, 27) from the upper edge of the flattened tube to the upper horizontal fold line (7 ) for forming two side surface extensions (3b, 4b) and a front and rear main surface extension (Ib, 1e, 2b, 2c, 2d), each of the front and rear main surface extensions (1b, 1e, 2b, 2c) , 2d) has at least two sections (1b, 1c, 2b, 2c), one of which has a height which generally corresponds to the width of the side surfaces (3 ', 3' ', 4', 4 "), characterized by that each side surface (3 ', 3' ', 4', 4 '') experiences a diagonal fold line (32, 33, 34, 35) which extends extends from the intersection point of the left and right vertical edges (10, 11) and the lower horizontal fold line (30) to each of the horizontal cuts (14, 15), the flattened tube being closed at one side , wherein the extensions (1b, 1c, 2b, 2c, 2d) and the portion comprising at least one area between the main surface (1, 2) Upper horizontal fold line (7) and lower horizontal fold line (30) are weighted transversely relative to the main surface 15 ( 1, 2) along the lower fold line (30), the side surface extensions (3b, 4b) being folded along the diagonal fold lines (32, 33, 34, 35) and along the lower horizontal fold line (30) and arranged on the inside of the the front and rear main surfaces (1, 2) located between the upper horizontal fold line (7) and the lower horizontal fold line (30), the front and rear main surface extensions (1b, 1c, 2b, 2c, 2d) being arranged on the side surface extensions (3b, 4b) for forming the upper surface of the strip, wherein the upper portions (1e, 2c, 2d) of the main extensions are connected to each other to form a supporting device provided with a support opening (18, 24), A flattened tube according to claim 1 for forming a paper bag provided with an integrated support device, characterized in that a reinforcing tube (16) is arranged and fixed between side surface extensions (3b, 4b) which are folded 90 ° to each other in the upper surface and folded extensions (lb, 2b) which complete the shape of the upper surface of the paw. li • «19 97462 A flattened tube according to claim 1 for forming a paper bag provided with an integrated support device, characterized in that a reinforcing sheet (19) is arranged and fixed in the extensions (1b ', 1c', 2c ', 2d') before the extensions are folded into their carrier position. 4. A flattened tube according to claim 1 for forming a paper bag provided with an integrated support device, characterized in that the integrated support device exhibiting folded extensions (1b ", 1c" and 2d ") is arranged in both the main surfaces (1, 2) the piano and extends on the upper surface of the pass. A flattened tube according to any of the preceding patent claims for forming a paper bag provided with an integrated support device 15, characterized in that a reinforcing strip (17, 20, 25) is attached between the supporting device forming extensions in the area through which the carrier opening (18, 24) is punched. A flattened tube according to any of the preceding patent claims for forming a paper bag provided with an integrated support device, characterized in that an opening device is provided in one side surface (3, 4). Flattened tube according to any of the foregoing patent claims for forming a paper bag provided with an integrated carrier device 25, characterized in that the blank of which the paper bag provided with the integrated carrier device is formed is obstructed along the proposed fold lines. Flattened tube according to any of the preceding patent claims for forming a paper bag provided with an integrated support device, characterized in that all the material of which the paper bag provided with the integrated support device is formed is substantially biodegradable. 20 97462 A flattened tube according to any of the preceding patent claims for forming a paper bag provided with an integrated support device, characterized in that it is filled with disposable articles. 5 10. Paper bag, characterized in that it is formed of a flattened tube according to any of claims 1 to 9.