The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1981
Filed:
Dec. 12, 1979
Applicant:
Inventors:
Lawrence G Martinelli, San Jose, CA (US);
Mark R Garrison, Santa Clara, CA (US);
Assignee:
Verbatim Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29F / ; B29C / ; B65D / ;
U.S. Cl.
CPC ...
156213 ; 264503 ; 264516 ; 264299 ; 206444 ;
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.