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:
Feb. 01, 1994
Filed:
Feb. 26, 1993
Applicant:
Inventors:
Yoshio Sakamoto, Tokyo, JP;
Syuhei Ohta, Tate, JP;
Yuji Yabuki, Miyazaki, JP;
Shigemitsu Muraoka, Miyazaki, JP;
Assignees:
Kabushiki Kaisha Kenwood, Tokyo, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264320 ; 26433112 ;
Abstract
An acoustic diaphragm is manufactured from a film of para-orientation aromatic polyamide through a molding process. In the molding process, the die for the molding process is heated to a predetermined temperature and then the molding press is conducted onto the film of para-orientation aromatic polyamide. The combination of the dies and film are cooled into about 80.degree. C. and then the clamping of dies is released to take the pressed film off.