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:
Nov. 14, 1989
Filed:
May. 20, 1988
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
425185 ; 2104161 ; 210435 ; 264169 ; 425197 ; 425199 ;
Abstract
A filter exchange device in a molten resin passage in an extrusion molding machine, which includes at least one filter casing for airtightly enclosing a spare filter and having port means for exhausting air out of the filter casing and filling the interior thereof with a gas inactive to molten resin. Fish eyes contained in the molded product after filter exchange reduced in number.