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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.:

US 10328613 B1

PDFFull Text
Date of Patent:
Jun. 25, 2019

Filed:

Aug. 22, 2017

Film-stretching apparatus and method of producing film

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Atsushi Nakazawa, Niihama, JP;

Daizaburo Yashiki, Niihama, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Jeffrey M Wollschlager

Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); B01D 67/00 (2006.01); B29C 35/02 (2006.01); B29C 35/04 (2006.01); B29C 35/06 (2006.01); B29C 55/04 (2006.01); B29C 55/08 (2006.01); B29C 55/12 (2006.01); B29C 55/16 (2006.01); B29L 31/34 (2006.01); B29K 105/00 (2006.01); B29K 105/04 (2006.01);
U.S. Cl.
CPC ...
B29C 35/045 (2013.01); B29C 55/04 (2013.01); B29C 55/085 (2013.01); B29C 55/12 (2013.01); H01M 2/145 (2013.01); H01M 2/1653 (2013.01); H01M 2/1686 (2013.01); B01D 67/0025 (2013.01); B01D 67/0027 (2013.01); B01D 67/0083 (2013.01); B01D 67/0086 (2013.01); B29C 35/0288 (2013.01); B29C 35/06 (2013.01); B29C 55/165 (2013.01); B29K 2105/041 (2013.01); B29K 2105/256 (2013.01); B29L 2031/3468 (2013.01);
Abstract

A film-stretching apparatus in accordance with an embodiment of the present invention includes a stretching furnace which is divided into a plurality of air amount control zones. In a case where the number of the plurality of air amount control zones is seven, a total amount of air to be discharged from, out of the plurality of air amount control zones, three air amount control zones which are located on an entrance side of the stretching furnace is controlled so as to be larger than a total amount of air to be discharged from, out of the plurality of air amount control zones, three air amount control zones which are located on an exit side of the stretching furnace.

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