FI58279B - FOERFARANDE FOER FRAMSTAELLNING AV PAOSAR - Google Patents

Description

R3SFH [B] (11) ILLUSTRATION 5827g jSfA lJ '' UTLÄCGN INQSSKRIFT 3 ° * '* 2¾¾¾ C (45) Fatc-nttl -ydn.-ity 12 01 1031 gja Patent cricddelat ^ ^ (51) Kv.lk.3 / lnt.CI.3 B 31 B 1/66 ENGLISH —FI N LAN D (21) htentdlwkwnu · —FetwttiwekiMng 770238 (22) HakamitpOyi - An * eknfng * d «f 26.01.77 (23) Alkupllvl — GIMgh« t * dag 26.01.77 (41) Tullut julktMkji— Bllvlt offantllg γγ IWttl · and the National Board of Registration Nihtivtwp ™, j. moonLM ^ n p ™ .-

Patant- och ragiftaratyralMd 7 AiwMcm utltgd och utUkrlftMi publlcarad 30.09.80 ~ (32) (33) (31) Py ^ Atty etuoikeus — Begird priorat 03.03.76

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 260873 ^ .3 (71) Windmoller & Hölscher, Miinsterstrasse 1 + 8-52, 1 + 51 + Lengerich i.W.,

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (72) Fritz Achelpohl, Lengerich, Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (7I +) Leitzinger Oy (5I +) Method for making bags - Förfarande för framställning av päin

The invention relates to a process for the preparation of the bags with handle holes, wherein the termplastista plastic foil hose continuously extending in the method is separated letkunpuolikkaiksi along a plane through the longitudinal center line approximately at the waved section line, on both sides of a longitudinal center line of the - parts of the machine side of the bag width of the shifted each other Pei slidable, at least half tube webs is passed a half-width of the bag back and the bags are welded gum particular letkunpuo- ^ passing through likasrainan poikittaishitsauksella both of bags from the webs.

In a method of this kind known from DT-AS 1 244 547, handle openings are punched in the hose at the longitudinal center line alternately to the left and right in the lugs formed by the wave cuts, the outer outlines of the lugs simultaneously forming the outer outlines of the handles. However, it is only due to the handle openings stamped from the wall of the bag that handles are obtained which, due to the heavy weight of the fully loaded bag, tend to tear.

2 58279

It is known to glue reinforcement strips to the handle opening parts of the bags in order to reinforce the handle openings, which strips have to be put in place one by one or pulled from a roll and cut, fitted and compressed. Known devices for fitting handle reinforcing strips to bags are not only expensive, but in addition the machine must be stopped to replace the strip stock or the strip web storage roll.

The object of the invention is therefore to provide a method by means of which the handle points of the bags can be strengthened in a simpler, faster and more economical manner. ~ This task is solved by the method described above, so that the tongues caused by the wave cuts in the hose half-web extending over the later opening edges of the bags are turned in the opposite direction over the hose walls and fastened to them, while cross-separating the punches are punched through the inverted tongues.

With the method according to the invention, bags with reinforced handles can be produced in a simple manner on machines which, due to the omission of the devices for fitting the separate reinforcing strips, require lower investment costs and operate at a higher efficiency due to fewer work steps.

The tabs provided by corrugated cutting can be joined to the hose walls by gluing or welding.

An embodiment of the invention is described by way of example below with reference to the accompanying drawing, which shows the various steps of the method.

An embodiment is shown in the drawing. The thermoplastic plastic foil tube 1 is coated with an adhesive width three middle section of the bottom and top, i.e., each wall of the hose on the outside and separated from the non-linear, but approximately wave-shaped line 2 across the width of three approximately mirror-symmetrical and half-wave shape or to that side of the subsequent bag width to the spatially offset letkunpuoliskoiksi 4, 5. The corrugated hose wall sections 6, 7 are bent on each side of the hose halves 4, 5 over their hose walls and glued to them by means of an adhesive layer of the main stove.

Bonding can also be omitted. Instead, after bending, the corrugated hose parts 6, 7 are welded to the hose walls, whereby welding can be performed along adjacent welding lines. Thereafter, the second hose half 4 is displaced with respect to the second hose half 5 by the width 8 of the later bag 9 in a known manner, not shown in detail, and the private bags 9 are separated from the hose halves 4, 5 by transverse welding 10 across the entire width of the hose 1, and both hose walls welded. Simultaneously with the cross-section welding, the handle openings 11 are punched in each bag.

Claims (3)

4 S8279 1. In the manufacture of bags provided a method to handle openings of a thermoplastic plastic foil hose continuously extending wherein the method comprises the separation letkunpuoliWcaiksi along a plane through the longitudinal center line of the roughly wave-like cutting lines on both sides of a longitudinal center line of the parts of the side of the bag width of the shifted mirror images, at least one side of the hose of the webs fed half bag width backwards and the bags are welded off both bag webs by transverse welding through each hose half-web, characterized in that the tongues (6, 7) provided by the corrugations (2) extending over the later opening edges of the bags (9) are turned on the hose half-web (4, 5) and fastening to them and at the same time, with the cross-separation welding, stamping the handle openings (11) passing out of the bags (9) through the inverted tongues. Method according to Claim 1, characterized in that the hose (1) is glued to both sides in the region of the corrugated line (2). Method according to Claim 1, characterized in that the lugs (6, 7) provided by the corrugated cuts (2) are welded to the hose walls after bending.