Method and device for producing tubular bags

Patent metadata

Field	Value
Publication number	US-9771192-B2
Application number	US-201414776570-A
Country	US
Kind code	B2
Filing date	Feb 25, 2014
Priority date	Mar 12, 2013
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The invention relates to a method for producing tubular bags made from plastic film or from composite film having a plastic layer on the bag content side, having a self-cutting plastic closure attached to the tubular bag, consisting of a spout part having a fastening flange, a cutting body, which is movably guided in the spout part, and a screw cover having means for activating the cutting body. The film material ( 5 ) is supplied from a supply roll to a bag manufacturing machine and the plastic closure is sealed onto the film material in a spout region of a tubular bag. According to the invention, the film material ( 5 ) is thinned on the inside of the bag in a ring-shaped region, which is intended for cutting by the cutting body, by means of a thermal embossing process. The plastic closure is then positioned and sealed onto the film material such that the cutting organ embedded in the spout part can become effective in the thinned, ring-shaped region upon use thereof.

First claim

The invention claimed is:

1. A method for producing tubular bags ( 6 ) made from plastic film or from composite film having a plastic layer on a bag contact side, having a self-cutting plastic closure ( 10 ) attached to the tubular bag ( 6 ), comprising a spout part having a fastening flange, a cutting body ( 11 ), which is movably guided in the spout part, and a screw cover, wherein the plastic film or composite film is supplied from a supply roll ( 17 ) to a bag manufacturing machine and the plastic closure ( 10 ) is in each case sealed onto the plastic film or the composite film in a spout region of a tubular bag ( 6 ), the method comprising:
thinning the plastic film or the composite film on an inside of the bag in a ring-shaped region intended to be cut by the cutting body ( 11 ), by a thermal embossing process; and
subsequently positioning and sealing the plastic closure ( 10 ) onto the plastic film or the composite film such that the cutting body ( 11 ) embedded in the spout part becomes effective in the thinned, ring-shaped region upon use thereof.

2. The method according to patent claim 1 , characterized in that the thermal embossing process is an ultrasonic embossing process.

3. The method according to patent claim 1 , characterized in that the plastic film or composite film is thinned in the ring-shaped region by the thermal embossing process beforehand and outside of the bag manufacturing machine and is subsequently provided on the supply roll ( 17 ).

4. The method according to patent claim 1 , characterized in that the plastic film or the composite film is thinned in the ring-shaped region by the thermal embossing process within the bag manufacturing machine.

5. The method according to patent claim 3 , characterized in that the plastic film or the composite film runs through a rolling or pressing stage immediately after the use of the thermal embossing process in order to smooth out or reduce irregularities and is subsequently provided on the supply roll ( 17 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Barron Dan

Classifications

• B29K2083/00

  Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material · CPC title

• B29K2067/003

  PET, i.e. poylethylene terephthalate · CPC title

• B65D5/747 Primary

  with means for piercing or cutting the container wall or a membrane connected to said wall · CPC title

• B29C66/4322

  by joining a single sheet to itself (B29C66/4332 takes precedence) · CPC title

• B65D2251/0028

  of the 51-type · CPC title