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. 16, 1993
Filed:
Dec. 15, 1992
Antti I Ilmarinen, Jyvaskyla, FI;
Valmet-Karlstad AB, Karlstad, SE;
Abstract
A press shoe for a shoe press with extended nip, said press shoe is of combined hydrostatic and hydrodynamic type and has a plurality of hydrostatic pressure pockets, each of which is preceded by a leading land surface and followed by a trailing land surface and into which lubricant is supplied under pressure. Each pressure pocket has a first pocket zone in which a hydrodynamic pressure shall be created and which comprises a bottom surface located at gradually decreasing depth from the concave surface portion of the press shoe seen in the direction of rotation of the belt member, said depth being zero at the trailing end of the pressure pocket. The bottom surface forms an angle .alpha. of from 0.degree. to about 2.degree. with a tangent to the concave surface portion of the press shoe at the trailing end of the pressure pocket. Further the first pocket zone is preceded by a second pocket zone comprising a plane bottom surface forming an angle .beta. of from 0.degree. to about .+-.10.degree. with a plane that coincides with the bottom surface of the first pocket zone.