Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1987-09-04
1989-02-28
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
264230, 264284, 2642896, 264DIG71, 425112, 425DIG53, B29C 5502, B29C 5318, B29C 6100, B29C 6102
Patent
active
048083631
ABSTRACT:
An apparatus for treating a moving web of laminated composite material of the type having a relatively thin film layer adhered to a relatively thick paper layer for eliminating the tendency of the web to curl toward the film layer side thereof subsequent to being stored on a spool with the film layer of the web positioned inwardly of the paper layer of the web, the film layer and paper layer each having an exposed surface and an attached surface, the attached surfaces of the layers being adhered together, the paper layer having an outwardly positioned thickness portion which terminates at the exposed surface thereof, an inwardly positioned thickness portion which terminates at the attached surface thereof and an intermediately positioned thickness portion positioned between the outwardly positioned thickness portion and the inwardly positioned thickness portion, the outwardly positioned thickness portion being relatively stretched, the inwardly positioned thickness portion being relatively shrunk, the intermediately positioned thickness portion being relatively unstretched and unshrunk, the film layer being relatively shrunk through storage of the composite web on the spool, comprising: composite web supply means, film heating means, paper heating means; the stretching occurring in the inwardly positioned portion of the paper and in the film layer and the shrinking occurring in the outwardly positioned portion of the paper layer being of an amount whereby oppositely positioned portions of the film layer and the paper layer of the web are of substantially equal length in an unstressed state subsequent to treatment by the apparatus whereby the tendency of the composite web to curl toward the film layer side is eliminated.
REFERENCES:
patent: 4254173 (1981-03-01), Peer, Jr.
patent: 4572752 (1986-02-01), Jensen et al.
Jensen James W.
Walsh Joseph C.
Adolph Coors Company
Anderson Philip
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