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. 01, 1992
Filed:
Nov. 19, 1990
Applicant:
Inventor:
Albert Grimminger, Leonberg, DE;
Assignee:
Werner & Pfleiderer GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
264142 ; 264143 ; 425 67 ; 425308 ; 425313 ; 425404 ; 425D / ;
Abstract
In order to prevent solidification of melt in the openings in an orifice plate of an underwater granulator during start-up, the water discharged from the housing of the granulator is diverted to a low pressure outlet so that during start-up a ring of water is formed on the inner surface of the housing. Thereby, melt strands from the orifice plate are cut in air and after the throughout of the melt becomes sufficiently high, the water discharged from the granulator is no longer diverted but is supplied to a post-treatment station and the housing becomes filled with water due to higher back pressure whereupon underwater granulation takes place.