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:
Apr. 24, 1979
Filed:
Oct. 25, 1977
Gomer E Kropa, North Reading, MA (US);
Leesona Corporation, Warwick, RI (US);
Abstract
An extrusion pelletizing process is disclosed wherein coolant is injected into the stream of thermoplastic material being extruded in such a fashion to interrupt the flow thereof and form discrete material lengths thereof as the material moves through the extrusion die and exits at the other end thereof in the form of pellets. The coolant is permitted to at least partially vaporize upon contact with the material stream and accordingly forms a solidified shell therearound including end portions of adjacent pellets so as to effectively separate such as they pass through the die. Such system enables the formation of discrete material lengths or pellets without the need of conventional cutting apparatus such as knives and the attendant support equipment necessary in their use.