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. 26, 1993
Filed:
May. 28, 1992
Applicant:
Inventor:
Jack Hayward, Hilton, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264171 ; 118411 ; 264212 ; 4251311 ; 425224 ;
Abstract
Polymeric films of two or more layers are cocast on a moving substrate from a die having extrusion slots which extend to parallel slot exits spaced close to the substrate. An upstream slot exit has outer and inner lips formed by coplanar lands. The outer upstream land extends to a pinning line formed by the intersection with an outer surface of the die. A downstream slot exit also has lips formed by planar lands and the outer land of the downstream slot exit is spaced a greater distance from the substrate than the other lands. Films with a plurality of uniform layers of different thicknesses are cocast from dopes of different viscosities.