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:
Oct. 28, 1986
Filed:
Jan. 31, 1985
Edward C Kirchner, Pittsfield, MA (US);
Ronald J DeFoe, Becket, MA (US);
Beloit Corporation, Beloit, WI (US);
Abstract
An apparatus for refining fibrous materials such as stock suspensions for papermaking which includes a housing, an inlet and outlet in said housing for receiving and discharging the treated materials, a shaft rotatable in said housing, a plurality of rotating refiner disks spaced along the shaft and an additional plurality of refiner disks interspersed with the rotor disks and providing therewith refining gaps through which the stock suspension passes. The other refiner disks can be either stationary or counter-rotating with respect to the rotor disks. The two sets of refiner disks are supported by means of axially flexible membranes. The present invention provides refiner disks which have undercut portions in the surfaces adjacent to the flexible annular membranes to increase the axial flexibility of the membranes.