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:
Nov. 02, 1993
Filed:
Oct. 07, 1991
Applicant:
Inventors:
Atsuo Watanabe, Osaka, JP;
Tatsuyuki Abe, Osaka, JP;
Assignee:
Yamauchi Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; B60B / ; B60B / ;
U.S. Cl.
CPC ...
492 37 ; 492 48 ; 492 53 ; 493467 ; 1001 / ;
Abstract
A paper machine press roll comprising a metal core, a ground layer formed over the outer periphery of the core and made of a metal material having a small coefficient of expansion, and a mixture layer formed over the outer periphery of the ground layer and comprising a ceramic and a water retentivity imparting particulate substance such as mica. At least in a surface layer portion of the mixture layer, an organic high polymer such as synthetic resin or wax is filled in the interstices between particles of the ceramic and particles of the water retentivity imparting substance.