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. 06, 2000
Filed:
Dec. 29, 1997
Applicant:
Inventors:
Assignee:
Toyoda Gosei Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
428 3691 ; 428 368 ; 4284763 ; 4284769 ; 428509 ; 428515 ; 428519 ; 428521 ; 5253317 ; 5253318 ; 5253326 ; 525387 ; 525343 ;
Abstract
A rubber layer structure provided with a first rubber layer having a first liquid facing surface for contact with a liquid surface and a second rubber layer in contact with a second surface of the first rubber layer. The first rubber layer is formed of a peroxide vulcanization first rubber compound which mainly comprises EPDM, contains sulfur powder as a co-crosslinking agent and does not contain a zinc compound. The second rubber layer is formed of a sulfur vulcanization second rubber compound which mainly comprises EPDM and contains a zinc compound. The first rubber layer and the second rubber layer are adhered together by vulcanization.