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:
Jun. 25, 2002
Filed:
Mar. 24, 2000
Applicant:
Inventors:
Tatsuya Tanaka, Takasago, JP;
Kazuhisa Fujisawa, Kobe, JP;
Kazuko Saka, Kobe, JP;
Tomoji Takahashi, Kobe, JP;
Koichi Fukushima, Kobe, JP;
Yasuaki Yamane, Takasago, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 4/400 ;
U.S. Cl.
CPC ...
B29C 4/400 ;
Abstract
A polyester resin is thickened in a chamber by first introducing the feed resin through a port and dehydrating in a drying section under reduced pressure. A chemical agent is then added to the dehydrated feed resin and mixed therewith in a thickening section The mixing occurs while deaerating under reduced pressure. The chemical agent functions to either increase the viscosity of the feed resin or suppress the lowering thereof.