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. 13, 1977
Filed:
Feb. 26, 1975
Boris Nisonovich Dinzburg, Moscow, SU;
Jury Alexandrovich Smetkin, Moscow, SU;
Vladimir Iosifovich Alexeenko, Moscow, SU;
Vsevolod Andreevich Mikhailov, Moscow, SU;
Ivan Lorant, Budapest, HU;
Gyozo Seltenreich, Dunakeszi, HU;
Jeno Keszei, Budapest, HU;
Gyorgy Marton, Budapest, HU;
Albert Balazsfai, Budapest, HU;
Jeno Donath, Budapest, HU;
Erno Bolcskei, Budapest, HU;
Abstract
Press molds for vulcanizing plastic materials comprise a pair of mold parts defining between them a mold cavity. One of the parts is a die and the other is a cover plate that defines with the die the mold cavity. A hot liquid is introduced into a lower portion of the mold cavity through the die and gas is removed from the upper portion of the mold cavity through the cover plate. As a result, both prevulcanization and after vulcanization can be achieved in one single press mold, by surrounding the material in the mold with hot liquid in the prevulcanization and then withdrawing the liquid when the molded material fills the die cavity in the second stage of vulcanization.