Plastic and nonmetallic article shaping or treating: processes – Utilizing heat releasable stress to reshape solid workpiece
Patent
1994-05-03
1995-10-17
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Utilizing heat releasable stress to reshape solid workpiece
53211, 53556, 156229, 264514, 2642896, 264342RE, 425140, 4253261, B29C 5528, B29C 6108, B29C 6568
Patent
active
054588413
ABSTRACT:
A novel process and novel apparatus for producing prestretched plastic film is presented. The method and apparatus are capable of forming a film from molten material and cooling the film to a non-molten condition so the film can be stretched. The cooled film is engaged and passed through a primary nip and second nip to plasticly and elastically stretch the cooled film to cold orient the film such that the film is stretched beyond the material's yield point. The cooled film is engaged with a plurality of idler rollers at a relatively low tension over a distance sufficient to allow the cooled film to relax to recover a major portion of its elastic deformation. Thereafter, the film is formed into a roll prior to being affixed to a unit.
REFERENCES:
patent: 4189288 (1980-02-01), Halter
patent: 4277594 (1981-07-01), Matthews et al.
patent: 4336212 (1982-06-01), Yoshimura et al.
patent: 4336679 (1982-06-01), Lancaster et al.
patent: 4436888 (1984-03-01), Copple
patent: 4767578 (1988-08-01), Thimon
patent: 4835218 (1989-05-01), Yoshimura et al.
patent: 4862678 (1989-09-01), Humphrey
patent: 4953336 (1990-09-01), Lancaster et al.
patent: 5017323 (1991-05-01), Balk
patent: 5186981 (1993-02-01), Shellhamer et al.
Illinois Tool Works Inc.
Thurlow Jeffery R.
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