Process of making cut, shaped blanks

Details Process of making cut, shaped blanks Process of making cut, shaped blanks

1995-05-22

1997-07-15

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Dividing work to form plural articles

2642884, 264292, B29C 5506

Patent

active

056480342

ABSTRACT:
An apparatus and method for continuously stretching a web of thermoplastic sheet into an arcuate form of desired curvature for the manufacture of laminated windshields. The apparatus includes conventional heating rolls, but employs at least two adjustable multispoke pyramids, one hot setting pyramid and one cooling pyramid which are separated by a wall incorporating a folding bar. The method relates to the manufacture of cut shaped blanks wherein hot setting and cooling steps are physically separated. Residual snap back after hot setting is released prior to the cooling step.

REFERENCES:
patent: 2933759 (1960-04-01), Startzell
patent: 3019475 (1962-02-01), Smith
patent: 3696186 (1972-10-01), Stark et al.
patent: 3912440 (1975-10-01), Koss et al.
patent: 4267140 (1981-05-01), Meeker
patent: 4554713 (1985-11-01), Chabal
patent: 4808357 (1989-02-01), Bourcier et al.
patent: 5071601 (1991-12-01), Matsuda

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