Forming process for light gauge polymer sheet material

Details Forming process for light gauge polymer sheet material Forming process for light gauge polymer sheet material

1979-12-12

1981-10-13

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264503, 264516, 264299, 206444, B29C 1704, B29F 110, B29C 300, B65D 8530

Patent

active

042946409

ABSTRACT:
A method for cold-forming light gauge polymer sheet material by application of localized heat to the area of the fold. In the manufacture of Lexan polycarbonate flexible magnetic disk jackets, heat is applied to the folded corner by a heater bar generally maintained uniformly at 375.degree. F. The heater bar contacts the folded Lexan polycarbonate edge in a U-shaped trough having planar side walls generally perpendicular to a planar bottom wall.

REFERENCES:
patent: 2373093 (1945-04-01), Baker
patent: 2952042 (1960-09-01), Garsson
patent: 3200182 (1965-08-01), Hechelhammer
patent: 3383375 (1968-05-01), van der Vegt et al.
patent: 3555135 (1971-01-01), Paul
patent: 3752723 (1973-08-01), Bruneau
patent: 3864755 (1975-02-01), Hargis
patent: 3932895 (1976-01-01), Ward
patent: 3977932 (1976-08-01), Fries et al.
patent: 4038693 (1977-07-01), Huffine et al.
G.E. Technical Marketing-Sheet Products-Primer (pp. 1-28).

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