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. 01, 1992
Filed:
Jun. 26, 1991
Applicant:
Inventors:
Yoshihiro Noguchi, Hanazono, JP;
Toshihisa Imai, Hanazono, JP;
Yutaka Takahashi, Hanazono, JP;
Hideharu Tanaka, Amagasaki, JP;
Assignees:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Home Appliance Co., Ltd., Saitama, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264113 ; 264112 ; 264120 ; 264126 ;
Abstract
The present invention concerns a method of preparing a porous structural unit comprising a plurality of layers having different specific gravities by pressing and heating a material including resin particles between opposing molds having a temperature difference to thereby cause the fusion or bonding of the resin particles, and a porous structural unit which improves acoustic absorption properties and heat insulation properties and in which the specific gravity is continuously changed.