Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/24—End- or aperture-closing arrangements or devices using self-locking integral or attached closure elements, e.g. flaps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/1658—Elements for flattening or folding the mouth portion
  • B65D33/1666—Slitted tubes with or without a core; U-shaped clips made of one piece
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
  • B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive

Definitions

• plastics in films or sheaths have the advantage, failing to be rigid, of being stiff and of being able to be reinforced by. folding, gluing, but they still involve quite elaborate manufacturing processes.
• bags made of plastic sheets certainly have the drawback of being extremely devoid of "hold” (they fall back on themselves and have no stiffness in their plane).
• extremely thin films are used (of the order of a few hundredths of a millimeter, or even a hundredth of a millimeter) in order to limit their cost.
• these sheets can be produced in films or sheaths which are easy to manufacture in feature films and it is possible to shape them (closure and association with other elements themselves made of plastic) by simple welding or gluing. But, with some extremely rare exceptions as we will see below, these bags are made entirely of plastic.
• plastic bags are currently divided into two categories
• this element is given the form of a board, a blade, a flat ruler, etc.
• the problem which the present invention proposes to solve consists in finding a means of strengthening a bag which has no holding.
• the rigid strip must be wound several times and is moreover made of a material liable to deform and possibly reinforced by metalic threads in order to be able to fold the two upper corners of the loaded bag during its transport, which allows better closure of the bag.
• the invention relates to a method for ensuring the closure of bags, in the form of a pocket to be suspended, made of flexible material, in particular film, by means of at least one rigid element consisting of:
• the rigid element is constituted by a simple flat rule.
• a rod of oblong section or any other long object with the only reserve that it has in its central zone a width approximately equal to the hollow of the hand, that is to say around 3 to 4 cms.
• the rigid element intended to come to bear against at least one of the upper edges of the bag will preferably have a length close to the width of the bag on which it is mounted.
• the length of the rigid element corresponds to the width of the bag.
• the rigid element will advantageously have a length slightly less than the width of the bag in order to facilitate the introduction of objects inside the bag. It can be made of any material having a certain rigidity, such as plain cardboard, cardboard impregnated with a plastic material or plastic material.
• the rigid element will advantageously be made of cardboard impregnated with a synthetic resin (for example polyethylene). It is attached to the wall of the plastic bag (which can be polyethylene, polypropylene, polyester or a complex) by heat sealing or by high frequency welding or the like.
• a synthetic resin for example polyethylene
• the bag will be supplied by the manufacturer generally with the rigid element fixed on the upper part of one of the walls of the bag.
• the rigid element can also be delivered separately and mounted on the bag when it is used.
• this stiffening element gives to the plastic bag on which it is mounted is to stretch the wall on the upper part of which it is fixed, which facilitates the introduction of objects inside of the bag, one of the walls being stiffened while the other remains flexible.
• the stiffening element makes it possible to ensure the closure of the bag by bringing the two walls closer and folding it against the free wall of the bag.
• the closure thus produced is completely hermetic since it extends over the entire width of the bag.
• the stiffening element also ensures excellent support of the bag which, even under the effect of a large load, does not deform, the rigid element working like a beam over the entire width from the bag.
• the stiffening element once folded down, serves as a gripping member.
• a hand pass can be provided on it, the latter being placed in such a way that the distance which separates it from the upper edge of the bag is substantially equal to twice the "palm of the hand" .
• the method according to the invention will include an additional step consisting in keeping the folded part of the bag completely folded against it by engagement on the flap of a movable rigid element, the upper part of which is in the form of a handle and the lower part of which is shaped to form a housing which retains and immobilizes the flap.
• the mobile rigid element is in the form of a removable handle which is placed on a bag of which at least one of edges will have been stiffened by fixing a rigid band, after loading the bag and folding the upper part, to ensure proper closure and more easily carry the bag.
• the removable handle according to the invention has this particularity of being able to be instantly mounted on the bag by simple transverse sliding on the flap and to ensure, after engagement on said flap, its connection with the bag and the closing of the latter. this .
• the handle according to the invention which is of a particularly simple design, will advantageously be made of plastic by injection molding.
• the lower part of the handle by which it is secured with the bag has an inverted U-shaped section, the branches of which have different heights, the highest branch having its lower part folded towards the inside of the U, the branches of the U overlapping the folded upper part of the bag, while the folded branch forms a housing in which the flap engages.
• the housing formed by the branch of the folded U will preferably have a width slightly greater than the thickness of the flap, so that the latter, once introduced into the housing, is immobilized.
• the housing will have a height corresponding to that of the flap so that after engagement of the flap in said housing, the lower edge of the rigid strip is substantially at the same level as the end of the branch of the folded U.
• the latter is separated from the horizontal branch of the U by a sufficient distance to allow the engagement of the folded upper part of the bag.
• the folded part of the branch of the U determines with the branch of the U not folded a longitudinal passage in which is engaged the upper part of the bag located immediately below the folded part.
• FIG. 1 represents a perspective view of a bag provided with a stiffener according to the invention.
• FIGS 2 to 7 illustrate the implementation of the process according to the invention.
• FIG. 8 shows a method of fixing a stiffener according to the invention.
• Figure 9 shows a bag laid flat for loading.
• Figure 10 shows a bag carried.
• Figure 11 shows a vertical section of the upper part of an open bag.
• Figure 12 shows a vertical section of the upper part of a closed bag.
• FIG. 13 represents a bag comprising a stiffener provided with a hand pass.
• Figure 14 shows a bag with a stiffener wound several times.
• FIG. 15 shows a bag comprising a stiffener associated with a flat bottom.
• Figure 16 illustrates the forces acting on the walls of a loaded bag.
• Figures 17A, 17B and 17C illustrate the process of closing a bag without a hand pass and setting up a handle according to the invention.
• Figure 18 shows a front view of a handle according to the invention.
• Figure 19 shows a sectional view along line 18-18 of Figure 18.
• Figure 20 shows the development of the lower part of the handle.
• FIG. 1 shows a bag 1 of thin plastic material provided with a stiffener 2 in accordance with the invention.
• the bag shown in this figure has lateral bellows 3, but it could not include such bellows and be simply constituted by two walls welded on their edges.
• the stiffener 2 is fixed inside the bag against the upper part of one of the walls. Its length corresponds to the width of the bag and its width is equal to that of the "palm of the hand".
• This stiffener is advantageously constituted by a sheet of cardboard impregnated with polyethylene which it will suffice to fix by thermo welding its upper edge against the upper edge of the wall of the bag.
• the bag has been shown during the closing operation which is carried out by folding the upper part in the direction indicated by the arrow F around the lower edge of the stiffener which acts as a kind of hinge.
• the stiffener 2 in its folded position, forms a gripping member for the bag.
• the bag is held by the folded part 4 which one has in the palm of the hand and by the end of the fingers which one slides under the flap.
• the stiffener was precisely given a width equal to that of the "hollow of the hand" to make it easier to hold it.
• the bag shown in Figure 1 has a hand pass 5 to facilitate gripping the bag.
• the hand pass 5 is positioned in such a way that once the upper part 4 of the bag is completely folded against the free wall, the hand pass is located just below the folded part. The bag is then held by its folded part which is well in the hand while the fingers are engaged in the hand pass 5.
• the real "rule”, that which makes the office of stiffener is constituted by the part located below the pass 1 ⁇ hand, the rest being a complement intervening only in the height of the stiffening element visible to the public when the bag is transported.
• a bag on which such a stiffener will be mounted will have a hand pass 7 (Figure 13) placed at the top of the bag as well as another hand pass 8, the distance separating the hand pass 7 from the hand pass 8 being substantially equal to twice the "palm of the hand".
• Figures 2 to 7 illustrate the process of setting up a stiffener on a bag.
• the stiffener consists of a plate 9 of rectangular, rigid shape, having an adhesive face 10 coated with a protective film 11.
• the bag on which the stiffener is to be fixed is laid flat, the wall to receive the stiffening element turned towards the support side ( Figure 2).
• the film 11 is removed and the plate is engaged after turning inside the bag by lifting the edge of the wall which is not intended to be stiffened while the other edge is kept very horizontal.
• the plate 9 is fixed, on one of the faces of which an advertisement may possibly be included, on the upper part of the wall of the bag (FIG. 3).
• the upper part 4 of the bag is then folded down along the lower edge 12 of the plate to close the bag which can then be held in hand, as illustrated in FIGS. 2 to 7.
• One of the primary functions of the stiffener according to the invention is to make the wall rigid on the upper edge of which it is fixed, facilitating the introduction of objects inside the bag when the latter is placed flat by simple lifting of the unstiffened edge.
• FIG. 8 illustrates diagrammatically the fixing by heat-sealing of a stiffener 2 constituted by a sheet of cardboard of rectangular shape impregnated with a synthetic resin (for example polyethylene).
• a stiffener 2 constituted by a sheet of cardboard of rectangular shape impregnated with a synthetic resin (for example polyethylene).
• the bag can withstand heavy loads without the risk of deforming its upper part.
• the stiffener can be rolled down as many times as desired so as to hold a small object in the bottom of the bag. dimension ( Figure 14), which thereby reduces the size of the bag.
• stiffener according to the invention can be advantageously used in association with the flat cardboard bottom described in the patent in question.
• FIG. 15 shows a bag equipped with a flat tapered bottom 16 such as that described in patent No. 2,338,854.
• FIGS. 17A, 17B and 17C illustrate the process of closing a bag which has no hand pass and of fitting a handle according to the invention.
• the bag 1 is shown in the open position with its stiffener 2 ( Figure 17A), consisting of a rigid strip made of a heat-sealable material and fixed by welding to the upper edge of the bag.
• the closure of the bag is obtained by folding the upper part of the bag along the lower edge 12 of the stiffener 2. Then engaged on the folded part 4 in the direction indicated by the arrow the removable rigid element according to the invention which is in the form of a handle 17 (FIG. 17 B).
• Said handle is placed on the bag by simple transverse sliding on the flap 4 (FIG. 17 C).
• the handle 17 ensures by its lower part the closure of the bag at the same time as its attachment to the bag.
• the handle 17 has at its upper part a handle 18 while its lower part is shaped so as to form a housing 19 in which the flap 4 engages.
• FIG. 18 shows a front view of a handle according to the invention and in FIG. 19 a cross section of this handle according to line 18-18 of FIG. 18.
• the lower part of the handle has an inverted U-shaped section whose branches 20 and 21 have different heights, the highest branch 20 being folded inwardly of the U to form a housing 19 in which the flap 4 engages.
• the housing 19 has a width slightly greater than the thickness of the flap to allow the engagement of the flap 4 but in such a way that the latter is maintained in a substantially vertical position in its housing.
• the folded part 22 of the branch 20 household with the other branch 21 of the U a longitudinal passage 23 in which is engaged the upper part 26 of the bag located immediately below the flap 4 ( Figure 17C).
• the end 24 of the folded part 22 is spaced a sufficient distance from the horizontal branch 25 of the U to allow the engagement of the folded upper part of the bag.
• the vertical side walls 20, 21 and 22 are given which delimit, on the one hand, the housing 19 in which the flap is retained and, on the other hand, the passage longitudinal 23 in which the upper part 26 of the bag is engaged, a shape and dimensions such that said walls engage one after the other on the folded upper part of the bag.
• the wall 22 which corresponds to the folded part of the branch of the U, has its ends 27 in the form of an arc of a circle while the walls 20 and 21 which correspond to the two branches of the U have a substantially trapezoidal shape.
• the outer wall 21 which is applied against the face of the bag opposite to that against which the upper part 4 of the bag has been folded down, has the shape of a trapezium whose vertices 28 have been rounded.
• the height of the wall 22 must correspond substantially to the height of the flap 4 so that, after engagement of the handle on the flap, the edge 12 of the rigid strip and the upper longitudinal edge 29 of the wall 22 is substantially at the same level.
• This edge 29 determines a line along which the
• the handle has, in its upper part, a handle 18 having in its grip zone a rounded edge 30 which makes the carrying of the bag more comfortable.
• the handle according to the invention constitutes an accessory of very great utility and of which one easily measures all the interest which it presents:
• a handle conforming to the invention will be used when it is a question of transporting heavy and bulky articles in large bags. Until now, we have not found a simple and economical solution to easily close and carry these bags.
• the present invention provides a particularly elegant solution to this problem by proposing a closure system with a very simple design and high efficiency, at the same time as it makes it possible to easily carry these bags.
• a closure system with a very simple design and high efficiency, at the same time as it makes it possible to easily carry these bags.
• the handle according to the invention which is advantageously used in combination with the stiffener has a lower cost price than the conventional closure system which is most often encountered on the most common plastic bags.
• stiffener can be attached to the outside of the bag, a bag can have two stiffeners attached to the upper part of the two walls.
• I t could be considered, in this case, to attach to the two ends of the handle by means which would be provided for this purpose, a cord allowing the bag to be worn over the shoulder.
• the handle at. instead of being obtained by molding in one piece with the rest of the handle, could be attached to the lower part of the handle.
• the handle could be produced by other methods than by

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26222578

Family Applications (1)

Country Status (5)

Cited By (3)

Citations (5)

• 1982
  • 1982-10-13 AU AU89949/82A patent/AU8994982A/en not_active Abandoned
  • 1982-10-13 WO PCT/FR1982/000168 patent/WO1983001430A1/fr active IP Right Grant
  • 1982-10-13 DE DE8282903049T patent/DE3274968D1/de not_active Expired
  • 1982-10-13 EP EP82903049A patent/EP0104176B1/de not_active Expired
  • 1982-10-15 IT IT23758/82A patent/IT1191032B/it active

Patent Citations (5)

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