DE2608734A1 - METHOD OF MANUFACTURING BAGS - Google Patents

Description

32 152 G / we March 3, 1976

Windmöller & Kölscher, 454o Lengerich i. W.

Method of making bags

The invention relates to a method for the production of bags with handle holes, in which a continuously moving flat tube made of thermoplastic plastic film through an approximately wave-shaped cutting line which penetrates the longitudinal center line and whose lines lie on both sides of the longitudinal center line Parts offset by half a bag width are mirror images of one another, separated into half-tubes, at least one of the half-tubular tracks is guided over a detour amounting to half a bag width and through one of the two half-tubular tracks penetrating transverse weld of both bag webs bags are welded.

709836/0271

In a method of this type known from DT-AS 1 244 547, alternating between the .Schlauch in the area of the longitudinal center line To the left and right, finger holes are punched into the tabs created by the wave cut, with the outer contour the flaps form the outer contour of the handles at the same time. Through handle openings punched only in the bag walls However, handles are created that can be torn out when the load is greater as a result of the heavier filling of the bag tend.

It is known to glue the handle hole parts of bags to reinforce the handle holes with reinforcement labels, which must be fed in individually or pulled off a roll and cut, inserted and pressed. Known devices Slips of paper that reinforce the handle area of bags are not only complex, they also arise In addition, machine downtimes due to the exchange of the slip magazines or the supply rolls of the slip webs.

The object of the invention is therefore to create a method according to which in a simple, quick and economical manner reinforce the grip hole areas of bags.

This object is achieved according to the invention in a method of the Zirt described at the outset in that the later The flaps of the semi-tubular webs, which protrude above the opening edges of the bag and are produced by the wave cut, move in opposite directions onto the Hose walls folded over and fastened to these and, at the same time, with the transverse weld from the bags, the folded over Finger holes penetrating the rag are punched out. The inventive method can be used in a simple Hand-hole reinforced bags are manufactured on machines

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those who because of the elimination of devices for feeding separate Reinforcement slips require less investment and because of the reduction in work steps with higher Performance work.

The flaps produced by the wave cut can be glued or welding to be connected to the hose walls.

An exemplary embodiment of the invention is illustrated below with reference to the drawing, in which various process steps are shown are explained in more detail.

An exemplary embodiment is shown in the drawing. A tube 1 made of thermoplastic plastic film is in the Middle in the width 3 below and above, so glued on both outer sides of the tube wall and through one not straight, for example Wavy line 2 in width 3 approximately mirror-inverted symmetrical and and a half wave form or half later Bag width offset half-tubes 4, 5 separated. The wave-shaped hose wall parts 6, 7 are on both Sides of the half tubes 4, 5 folded over on their tube walls and glued to them by means of the glue applied.

The gluing can also be omitted. Instead, the wave-shaped tube portions 6, 7 after folding over to the Hose walls welded to these, the weld in adjacent Weld lines can be executed. Then one half tube 4 becomes the other half tube 5 around the Half of the width 8 of the later bag 9 offset in a known, but not shown manner and individual bags 9 by a

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Cross cutting weld running over the entire width of the hose 1 1o separated from the half-tubes 4, 5 and the two tube walls of the bags 9 welded together. Simultaneously the handle holes 11 are punched out in both bags with the cross-cut weld.

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Claims (3)

PATENT CLAIMS Method of making bags with handle holes, in which a continuously moving flat hose made of thermoplastic plastic film through a longitudinal center line penetrating, roughly wavy cutting line, the parts of which lie on both sides of the longitudinal center line around half a bag width offset to each other are mirror images, separated into half-tubes, at least one of the half-tubular webs are guided over a detour amounting to half a bag width and through one of the two half-tubular webs penetrating cross-cut welding of both bag webs bags are welded, characterized in, that the later opening edges of the bags protruding, The flaps of the semi-tubular webs produced by the wave cut are folded over onto the tubular walls in opposite directions and attached to these and at the same time penetrating the folded flaps with the transverse weld from the bags Finger holes are punched out. 2. The method according to claim 1, characterized in that the hose is glued on both sides in the region of the wave cutting lines will. 3. The method according to claim 1, characterized in that the flaps produced by the wave cut after folding be welded onto the hose walls with these. 709836/0271 ORIGINAL INSPECTED