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:
Apr. 07, 1992
Filed:
Jul. 02, 1990
Applicant:
Inventor:
Glenn D Lamb, Granville, OH (US);
Assignee:
Owens-Corning FIberglas Corporation, Toledo, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156260 ; 156264 ; 156512 ;
Abstract
A method and apparatus for manufacturing roofing shingles having tabs and cutouts comprises a cutting cylinder for engaging a membrane and cutting it into continuous strips, where the circumference of the cutting cylinder and the length of the shingle have a common factor other than the length of the shingle, and an endcut cylinder for cutting the continuous shingle membrane strips into discrete roofing shingles, so that the pattern of tabs and cutouts will repeat itself periodically.