Jacket for a flexible magnetic disk and production of the jacket

Details Jacket for a flexible magnetic disk and production of the jacket Jacket for a flexible magnetic disk and production of the jacket

1988-03-22

1989-04-18

Schmidt, Frederick P.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

156216, 156227, 264235, 493251, 493946, B31B 164

Patent

active

048223271

ABSTRACT:
The blanks punched out from a film web and folded to form the jacket are then heated for a short time and cooled again in order to eliminate stresses in the jacket material which give rise to deformations and are also produced by the action of heat during processing of the material.

REFERENCES:
patent: 3200182 (1965-08-01), Hechelhammer et al.
patent: 4443398 (1984-04-01), Martinelli et al.
patent: 4608039 (1986-08-01), Ferri, Jr. et al.
patent: 4627829 (1986-12-01), Brady, Jr. et al.
patent: 4630427 (1985-12-01), Harper et al.

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