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:
Sep. 27, 1994
Filed:
Sep. 29, 1993
Applicant:
Inventor:
Timothy L Ray, Winchester, VA (US);
Assignee:
O'Sullivan Corporation, Winchester, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29B / ; B01F / ;
U.S. Cl.
CPC ...
366 75 ; 366 76 ; 425447 ; 425449 ; 425593 ;
Abstract
A batch mixer includes a mixing chamber in which polymeric material such as plastics and rubber is heated and mixed. The material is fed to the mixing chamber through a hopper. The hopper has a door which is swung open and closed by a fluid-actuated cylinder. A locking mechanism is provided to enable the door to be swung only slightly open by excessive pressure build-ups in order to vent the pressure without permitting an appreciable amount of molten material to escape through the door.