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:
May. 08, 1984
Filed:
Dec. 16, 1981
Stanley Prew, Montoursville, PA (US);
Koppers Company, Inc., Pittsburgh, PA (US);
Abstract
A disc type refiner, for paper pulp processing and the like, is provided with an automatic control mechanism to prevent contact-clashing of the refiner plates on short term losses of feed and to sense the long term losses of feed so as to open the refiner plates before contact-clashing occurs. The control mechanism includes a counter-force-producing means acting in opposition to the refining or attrition force-producing means such that, on either short or long term loss of feed, resistance to plate clashing is provided. Moreover, the counter-force-producing means is monitored and the monitor provides signals to actuate, in cooperation with other control devices, a desired sequence of operative steps to effectuate either the continuation or the discontinuation of the refining operation.