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. 23, 1992
Filed:
May. 06, 1991
Applicant:
Inventor:
Hidetoshi Arima, Obu, JP;
Assignee:
Tokai Kogyo Kabushiki Kaisha, Obu, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; E06B / ;
U.S. Cl.
CPC ...
428122 ; 49475 ; 49497 ; 49498 ; 428 31 ; 428188 ; 428217 ; 428358 ;
Abstract
A molding including a portion formed of hard rubber, a portion formed of sponge rubber, and a portion formed of hydrid of the hard rubber and the sponge rubber. The hybrid is effectively formed by simultaneously introducing the hard and sponge rubber into a flow port communicated with an extruding opening of a molding die whereby the molding is formed in one extruding process and from only two types of rubber. Apparatus for manufacturing the molding includes a feed pipe for feeding the hard rubber, a feed pipe for feeding the sponge rubber, and a molding die having an extruding opening and at least three flow conduits communicating with the extruding opening.