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:
Sep. 08, 2009
Filed:
Sep. 23, 2004
Kazuhide Kanemura, Kanagawa, JP;
Kazuhide Kanemura, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
A dope is discharged from a casting die toward a belt to form a film-like material above the belt. Thereby a range near the film-like materials is decompressed by first and second decompression chambers. A pipe connecting each decompression chamber to a pressure controller has an inner diameter from 70 mm to 700 mm, and a length of the pipe is at most 30 m. Further the pipe is provided with a first expansion silencer of expansion silencer and a second expansion silencer of resonance silencer, and a sectional dimension ratio of the first expansion silencer to the pipe is from 5 to 500. Thus a pressure fluctuation in the second decompression chamber and the pipe is reduced and the film-like material becomes uniform. Thus the obtained film has no thickness unevenness, and used for producing a polarizing filter excellent in optical properties and a liquid crystal display.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile