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:
Dec. 30, 1980
Filed:
Dec. 31, 1979
Applicant:
Inventors:
Raymond B Dacey, Simpsonville, SC (US);
Frederick D Stringer, Greenville, SC (US);
Assignee:
W. R. Grace & Co., Duncan, SC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29D / ; B29D / ;
U.S. Cl.
CPC ...
264230 ; 242 685 ; 2642896 ; 2643 / ; 264348 ;
Abstract
A generally cylindrical core for winding a web of sheetlike material has portions with a lesser diameter than other portions such that otherwise baggy areas of the web overlie the lesser diameter area of the core. The core particularly solves the problem of elongated edges on a wound film of heat shrinkable thermoplastic material caused by differential shrinkage about a core.