Process of manufacturing laminated web

Details Process of manufacturing laminated web Process of manufacturing laminated web

Filed on

1978-02-03

Date issued

1980-11-04

Examiner

Weston, Caleb

Patent Class

Adhesive bonding and miscellaneous chemical manufacture

SubClass

Methods

SubSubClass

Surface bonding and/or assembly therefor

Other Related Categories

15624418, 15624419, 15624423, 15624424, 15624425, 15624427, B29D 2304

Type

Patent

Status

active

Patent number

042318327

Description

ABSTRACT:
The gas and light barrier properties of a web of thermoplastic bags designed for aseptic packaging are improved by laminating a material of high gas and light imperviousness, such as metal foil, to the thermoplastic bag material during a blown film extrusion process. In one embodiment a pair of foil laminates are applied to opposite sides of the inflated length of a blown tube between the extruder and a first pair of nip rolls, with the laminates being pressed into opposite sides of the inflated tube by rollers which flatten the tube at their points of contact to provide flat surfaces for the laminates being applied to the tube. The resulting laminated web has a pair of aligned, uncovered strips running the length of the web along which a slit-seal is made to provide a pair of webs each having a layer of foil or other material laminated to all but one longitudinal edge thereof. In another embodiment a single sheet of foil is applied to a tube of film using, for example, a conventional tube former, with the foil wrapping less than the full circumference of the tube to provide a single web having an uncovered section running longitudinally thereof.

REFERENCES:
patent: 2962843 (1960-12-01), Hoelzer et al.
patent: 3094449 (1963-06-01), Sisson
patent: 3467565 (1969-09-01), Utz
patent: 3532571 (1970-10-01), Ausnit
patent: 3551243 (1970-12-01), Schuur et al.

Affiliated with

Also associated with

Rating

Process of manufacturing laminated web does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process of manufacturing laminated web, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of manufacturing laminated web will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1643529