NZ249909A

NZ249909A - Bag formed from folded pleated sheet: pleats releasably adhered

Info

Publication number: NZ249909A
Application number: NZ249909A
Authority: NZ
Inventors: Gilbert Capy; Akiva Buchberg
Original assignee: Gilbert Capy; Akiva Buchberg
Priority date: 1992-03-27
Filing date: 1993-03-26
Publication date: 1996-06-25
Also published as: KR950700848A; NO943566L; CZ286951B6; AU670577B2; JP2691379B2; NO943566D0; FI944407A0; CA2117683A1; DK0631560T3; BR9306141A; DE69303012T2; SK108994A3; RU94042728A; CZ214294A3; RU2107647C1; NO303727B1; AU3758193A; KR100226240B1; WO1993019996A1; JPH07504875A

Abstract

A sheet including at least one pleated region (13) with end-fastened folds (3). The sheet is folded in half in a direction perpendicular to that of the folds (3) and at least one of its ends (15) is sealed by fastening together the edges to give a receptacle suitable for loose goods. The receptacle may then be extended out to provide a fully or partially sealed package.

Description

2*t9 y 0 9 New Zealand No. 24997)9 International No. PCT/FR93/00303 TO BE ENTERED AFTER ACCEPTANCE AND PUBLICATION Priority dates: "a <») U=>\^"3 International fifing date: av>\ 3 Classification: \PSfeSD'a©/1© . 6ioS>33/c»o- ftfesubs/za-, e»fc»«ST>7s/a9r Publication date: 2 5 JUN 1996 Journal No.: | q_o NEW ZEALAND PATENTS ACT 1953 COMPLETE SPECIFICATION Tiile of invention: Packaging made from a thin pleated sheet forming a bag for loose goods Name, address and nationality of ' applicant(s) as in international application form: GILBERT CAPY and AKIVA BUCHBERG both residing at La Botte, F-69640 Jarnioux, France, both French citizens. 2 4 9 9 0 9 WO 93/19996 - 1 - PCT/FR93/00303 Packaging made from a thin pleated sheet forrrH -ncr a bag for loose goods.

The present invention relates to packaging made from a pleated film and capable of packaging, in particular, loose goods such as chips, but not exclusively.

Patent FR-A-2595666 claims the packaging of a convex body with the aid of a pleated thin sheet, the folds of which are fastened at their ends. Patent FR-A 2628719 claims several modes of fastening of the said folds. Patent FR-A-2676037 describes packaging composed of paper, a part of which is pleated and capable of being extended out, and the other unpleated part of which, is made from the same sheet or from a different sheet fastened to the end of the pleated part. This packaging is intended to package a convex object of relatively stable shape. None of these packagings makes it possible, on the other hand, to package a set of objects which are incoherent since they do not have a stable shape, because it is impossible to extend the packaging around. French Patent Application No. 91-11965 proposes a solution to this problem by associating a cardboard receptacle with a pleated paper sheet capable of being extended out; the goods are introduced into the cardboard receptacle, then the paper sheet is extended but using the cardboard receptacle as support having a convex shape; this solution which makes it possible to obtain relatively aesthetic packaging is expensive since it uses cardboard; moreover it has the disadvantage of associating a rigid sheet of complex Bhape and a pleated flexit,\e sheet which creates risks of tearing at the join of the two types of sheets during handling.

The object of the invention is to propose packaging such as claimed, in particular for loose goods, which is designed solely from thin films.

The appended drawings show illustrative embodiments of this packaging.

Fig. 1 represents packaging according to the invention unextended.

Fig. 2 represents packaging according to the 24 9 9 0 9 WO 93/19996 - 2 - PCT/FR93/00303 invention unextended and furnished with a concertina-shaped bottom.

Pig. 3 represents packaging according to Fig. 1 extended.

Fig. 4 represents packaging according to Fig. 2 extended into a configuration in which the shape of the folds allows the creation o£ a receptacle.

Fig. 5 represents a variant of the packaging according to the invention including an unpleated part sealed at its end.

Fig. 6 represents the packaging of Fig. 5 extended.

Fig. 7 represents packaging according to the variant represented in Fig. 5, the unpleated part of which is fastened on the one hand at its end and on the other hand at the join with the pleated part so as to constitute a bag.

Fig. 8 represents packaging according to the variant depicted in Fig. 5, the pleated part of which is replaced by a pleated part whose folds are disabled so that they cannot be extended out.

Fig. 9 represents the packaging of Fig. 8 when it is sealed by extending-out the pleated part.

Fig. 10 represents packaging according to the variant depicted in Fig. 8/ the folds of which are not disabled and which can be extended out before sealing by extending out the pleated part.

Fig. 11 depicts the packaging according to Fig. 10 when it is extended fully.

Fig. 12 represents the packaging of Fig. 6 after inversion and opening.

Fig. 13 represents a bag with offset edges according to the invention.

Fig. 14 represents a film whose edge includes a hem made before pleating the film.

Fig. 15 represents the previous film pleated with indication of the regions for fastening the folds.

Fig. 16 represents a bag whose folds have been unravelled in order to widen the aperture thereof. 249 9 0 9 WO 93/19996 - 3 - PCT/FR93/00303 Fig. 17 represents a bag according to the invention containing a sandwich.

Fig. 18 represents the bag containing the sandwich according to Fig. 17 sealed by a flap. 5 Fig. 19 represents the bag according to Fig. 17, the folds of which have been unravelled in order to widen the aperture thereof.

Fig. 20 shows a section through the pleated region according to Fig. 15 located beneath the hem. 10 In a first variant of the invention a pleated packaging is made from a thin sheet in accordance with one of the Patents FR-A-2595666 and FR-A-2676037; the pleating assumes a substantially plane and rectangular shape; the packaging is folded up on itself (Fig. 1) in 15 such a way that the resulting crease 1 or creases 2 (Fig. 2) are perpendicular to the folds 3 (Fig. 1) constituting the packaging; next, the lateral edges 4 and 5 are fastened together by a means appropriate to the composition of the thin sheet so as to form a bag; it is 20 possible, by appropriate folding, to make a concertina 6 at the bottom of this bag Another way of creating a receptacle is to start from a pleated packaging of the type of that described in Patent Application FR-A-26767037 in which the pleated part 13 is prolonged by an unpleated part 14 making it possible to envelop for example a sandwich made from a semi-rigid crepe folded in half; this packaging is folded up on itself, while possibly making a concertina as before, and only the end 15 of the unpleated part is fastened; the goods are placed in the unpleated part 14 so as to fill it optimally and thus constitute, in cooperation with the latter, a coherent whole which can then be sealed (Fig. 6) by extending the pleated part (13) . The same result can be obtained using an unpleated part 14 of different width 16 from the length 17 of the folds, and which is added and fastened to the part 13 as described in Patent Application FR-A-2676037; the whole being folded up as before and the end 15 of the unpleated part 14 fastened to itself. One of the advantages of this sort of packaging is that it can be inverted in order to support the extended part 13 (Fig. 6) ; next, the unpleated part 14 can be lifted like a cover to reveal the loose goods held in the extended part 13 which has the shape of a bowl (Fig. 12). In one variant of the version of the invention just described, the unpleated sheet 18 (Fig. 7) fastened to itself at each of its ends 19 and 20, forms a bag which can be covered over by the extending of the pleated part 21. An enhancement to the variants of the invention just described consists in replacing the unpleated part 14 or 18 with a pleated sheet 22 (Fig. 8) , the folds of which are fastened at their ends, either with the same pitch as the pleated part 23, or with a different pitch; the folds 24 thus produced can serve as thermal insulation when they are not extended; if necessary it is possible to fasten them together, for example along one or more lines 25 249909 WO 93/19996 - 6 - PCT/FR93/00303 perpendicular to the direction o£ the folds 24, so as to prevent them from being extended out and insulated packaging (Fig. 8 and Fig. 9} is obtained, operating like those just described (Fig. 5 and Fig. 7) . It is also possible not to disable the folds 26 (Fig. 10) and allow them to be extended in such a way as to create a kind of receptacle 27 which, when it is filled with goods and extended, can be covered over by extending (Fig. 11) the pleated part (28) in such a way as to seal the aperture thereof. The variants just described apply as stated to packaging including a concertina-shaped bottom 6 (Fig. 2) as regards the pleated part 13 (Fig. 5) as well as the unpleated part 14, the figures cited being so by way of example and not being limiting. Similarly, the unpleated parts can be replaced with a pleated part 22 (Fig. 8) with disabled folds or non-disabled folds 26 (Fig. 10) in all the variants described.

To allow better opening of the pleated bag described earlier, it suffices to offset the edges 31 and 32 (Fig. 13) ; the wall 33 of the bag corresponding to the longer edge 32 serves as guide for parting the other wall 31 and thus opening the bag. Under these conditions, when the folds 34 are fastened by a hem 35, based for example on a sheet of paper coated with polyethylene on one face, an offset 36 between the two edges 31 and 32 is preferably chosen greater than the height 37 of the hem 35; the hem 35 of the edge 32 set furthest back comes into contact with a polyethylene-coated wall 33 when effecting the weld 14 of the lateral edges 4 and 5 of the bag, and can therefore be fastened to the other face 33. The offset 36 between the two edges 31 and 32 can be increased deliberately so that one of the two walls 41 (Fig. 17) can constitute a flap making it possible to seal the bag (Fig. 18) thus produced, in the manner in which an envelope is sealed. It is noted that in the bag thus produced the presence of the folds implies that at least one part 42 (Fig. 20) of the surface of the sachet includes at least three thicknesses of paper 43, 44, 45 and constitutes, in these regions, more effective insulation 249 909 WO 93/19996 - 7 - PCT/FR93/00303 against heat losses.

If it is desired to be able to unravel the folds of the bag (Fig. 16) in order to open it vide without any risk of tearing the pleated film by initiating a fracture 5 starting from the margin of the film, it suffices to make a hem 46 (Fig. 14) prior to the pleating (Fig. 15) of the film 47 (Fig. 14).; this hem 46, which can be fastened depending on the materials used by any known means, precludes the margin 48 from being subjected directly to 10 the tensile stresses; next, the folds 49 are fastened together (Fig. 15) preferably on just one side of the film in such a way that, for example, the sheets 44 and 45. (Fig. 20) adhere together by welding of the outer coat of the film when it is added, for example by adhesive 15 bonding or coating, or by applying glue directly to the surface of the film, whereas the sheets 43 and 44 do not adhere to one another. When, for example, polyethylene-coated paper is used, the hem 46 (Fig. 14) is made by positioning the plastic inside the fold and the hem 46 is 20 welded at 50; to be specific, the hem 46 is, for example, between 5 and 10 tnmin [sic] in width for packaging intended to contain of the order of 150 g of chips; then, the pleating (Fig. 15) is made and the folds are fastened in the region 51 adjacent to the hem 46 by direct heating 25 of the paper in such a way that the walls 52 and 53 (Fig. 20) of the polyethylene-lined sheets 44 and 45, which are in contact with one another, axe fastened together by welding; the pleated region 54 (Fig. 15) corresponding to the hem 46 merely having paper walls, 30 there is no fastening-together of the folds in this region 54 which is therefore free o£ any stress when the folds 34 are pulled in the direction 55 perpendicular to thn folds 34 in order to unravel them; on the other hand, in the region 51 " fastening-together of the folds, the 35 polyethylene -onanon to both walls 52 and 53 (Fig. 20) fac .ie another is separated from one of the walls under ti .ction oC the tension 55 which is exerted perpendicularly to the folds 34; this wrenching is facilitated by the fact that, in the technique adopted 249 9 0 9 WO 93/19996 - 8 - PCT/FR93/00303 for the fastening of the folds, the weld operates in peeling and not in shear. It is possible for certain applications to fasten the folds 34 (Fig. 15) in the same way as just described in other regions of the bag and in 5 particular in the vicinity of the bottom 56 (Fig. 16); Indeed, it may be desired to widen the aperture 57 of the bag in order to give it the shape of a basket without the bottom being extended, or conversely, to extend merely the bottom 56 of the bag so that the aperture is resealed 10 and retains the heat of the contents to best effect.

This type of bag may very well be used (Fig. 17) for placing sandwiches of various shapes therein; sealing (Fig. 18) can be provided for by a flap 41 formed by the longest side and retained for example by a sticker 58 or 15 any other system available on the market. In order to consume the sandwich 59 (Fig. 17) , contained in this bag, it suffices to part the edges 60 (Fig. 19) of the bag so as to increase the size thereof and expose a part of the sandwich 59 without however needing to remove it from its 20 packaging. This bag is especially well suited to long sandwiches. 249 909

Claims

ClaimB.

1. Bag-forming packaging intended to contain loose goods comprising " a pleated thin sheet folded up on itself perpendicularly to the direction of the folds (3) 5 in order to form two walls connected together by at least one of their margins (4, 5) and a concertina (6) bottom (8) while leaving an aperture whose edges are offset, characterized in that the asymmetric folds (3) fastened at their ends include, in proximity to a hem (35, 46) 10 formed before pleating and by applying a line of adhesive, another temporary fastening of the walls (52 and 53) of each fold facing one another and which is located on the same side of the sheet, so that the internal faces (44 and 45) of the folds adhere together and that 15 the outer faces (£3 and 44) do not adhere together, so as to allow the said folds to be extended out under the effect of a tension exerted perpendicularly on the corners (9) of the bat* detaching the adhered parts (44 and 45) of the folds and permitting an increase in the volume of the 2 0 packaging.

2. Packaging according to Claim 1, characterized in that it includes an unpleated part (14) located directly in line with the direction of extending of the folds, of width (16) equal to or different from the width 25 (17) of the pleated part (13), which either originates from the sane sheet as the ^ part or is added and fastened to the pleated part, sealed at its end (15) serving as receptacle for the loose goods ff** whilst the pleated part (13) can be extended out in o||rde£ to seal the receptacle. 30 3. Packaging according to Claim 2, characterized that the unpleated part is sealed at its end (19) and in the region of separation (20) with the pleated part (21) in such a way as to constitute a bag capable of being sealed by the extending of the pleated part (13). 35 4. Packaging according to Claims 2 and 3, charac terized in that the unpleated part (14) is replaced by folds (22), fastened at their ends, also capable of being fastened along one or more lines (25) in order to prevent

3. MODIFIED SHEET

4. Z4 9 9 - 10 - the extending thereof and create a thermal insulation by the superposition of several thicknesses of sheets.

5. Packaging according to Claim 4, characterized in that some of the folds (26) are fastened only at their 5 ends in such a way as to be able to be extended out before the receptacle as a whole is in turn sealed by the extending of another pleated part (28) .

6. Packaging according to Claim 1, characterized in that the offset (36) of the edges (31 and 32) is greater 10 than the height (37) of the hem (35) so as to allow the edge (31) to be fastened to the internal wall (33) of the bag.

7. Packaging according to Claim 1, characterized in that the same mode of temporary fastening of the folds is 15 used in other regions of the bag and especially in the vicinity of the bottom (56). MODIFIED SHEET 249909 - 11 - Bag-forming packaging substantially as herein described with reference the accompanying drawings. m <1 ■'tafi O's *t-\\ *~V. •