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:
Jul. 17, 1990
Filed:
Jul. 30, 1986
Applicant:
Inventor:
John A Penoyer, Greenville, SC (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 22 ; 101 17 ; 101 32 ; 21912166 ; 21912172 ; 21912173 ; 21912179 ; 264 25 ; 264 401 ; 264132 ; 2642102 ; 264284 ; 427 531 ; 427 541 ; 427177 ; 427284 ; 428157 ; 428192 ;
Abstract
A contactless method for knurling thermoplastic film to improve its winding characteristics is disclosed. A preferred embodiment employs an ink jet printer to intermittently deposit ink upon at least one margin of the moving film surface. A second preferred embodiment employs a laser to intermittently modify at least one margin of the moving film surface. The invention eliminates the problem of stress gradient during web transport prior to winding which is inherent in contact knurling and particularly troublesome in the manufacture of high modulus, relatively thin thermoplastic films.