Method and apparatus for producing a laminated composite material having perforated inner layer
AssigneeAdolph Coors Company
InventorJames W. Jensen, Jr.
Life of this patent
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Abstract
A device and method for forming a moving web of laminated composite material having weakened zones therein from a moving continuous web of relatively extensible plastic film material, having identical sets of graphics printed on nominally constant length repeat length portions thereof which are subject to length variation from a constant design repeat length distance, and a moving continuous web of relatively nonextensible paper material. A method and device for forming a three-layered composite material having weakened zones therein is also described. Carton blanks and liquid tight cartons having tear away tab portions formed from such three-layered composite material are also described.
Claims20
A device for forming a moving web of laminated composite material having weakened zones therein from a moving continuous web of relatively extensible plastic film material having identical sets graphics printed on nominally constant length repeat length portions thereof which are subject to length variation from a constant design repeat length distance and a moving continuous web of relatively nonextensible paper material, said film material and said paper material each having a lamination surface to be laminated to an opposed surface of the other material and an exposed surface for forming an exterior surface of the laminated composite, said device comprising:
- (a) paper supply means for providing a continuous web of paper to be laminated, said paper supply means defining the upstream end of said paper web;
- (b) film supply means for providing a continuous web of film to be laminated, said film supply means defining the upstream end of said film web;
- (c) cutter means defining a cutter nip for repeatingly cutting spaced apart perforated patterns in said paper web at one design repeat length distance intervals;
- (d) adhesive supply means for applying adhesive material to at least one of said film web lamination surface and said paper web lamination surface;
- (e) laminating nip means for engaging and moving said paper web and said film web in parallel aligned relationship at equal speeds and for laminating said paper web to said film web for forming a laminated composite;
- (f) registration means for providing accurate registry of said perforated pattern portions of said paper web with predetermined, spaced apart, repeating target areas on said film web located at an identical position within each said set of film graphics, at said laminating nip means;
- (g) composite transport means for continuously moving said composite web from said laminating nip means;
- (h) whereby a continuous composite web comprising a paper web portion and a film web portion and having weakened zones therein associated with said spaced apart perforated patterns in the paper web portion thereof is provided.
A method of forming a moving web of laminated composite having weakened zones therein from a moving web of relatively nonextensible paper material and a moving web of relatively extensible film material having repeating sets of graphics positioned in nominally constant length repeat length portions thereof and having target areas with a predetermined size, shape, and position within each repeating set of graphics, comprising the steps of:
- (a) moving the paper web at a predetermined speed;
- (b) moving the film web into touching parallel aligned relationship with the paper web at a speed equal to the speed of the paper web;
- (c) at a position on the moving paper web upstream from the point of initial parallel touching contact of the two webs, cutting perforated patterns on the moving paper web with identical shape and spacing as said target areas on the moving film web;
- (d) at a control region along the moving film web upstream from the point of initial touching contact of the two webs periodically adjusting the tension in the film web to selectively stretch or shrink the film web passing through the control region to provide accurate registry of said perforated patterns with said target areas at the point of parallel touching contact;
- (e) coating at least one of the touching surfaces of the moving paper web and moving film web with an adhesive agent upstream of the point where the paper web and film web are brought into parallel touching contact;
- (f) compressing the moving paper web and film web at the point of parallel touching contact to form a laminated composite having weakened zones therein corresponding to the perforated patterns cut in the paper web and the associated target areas on the film web.
Dependencies are inferred from the claim text.