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:
Jul. 27, 1999
Filed:
Oct. 20, 1997
Thomas N Hall, III, Hackettstown, NJ (US);
Yogesh C Trivedi, Grosse Ile, MI (US);
Other;
Abstract
The subject invention pertains to an apparatus with the continuous expansion of thermoplastic minipellets, particularly polypropylene. The apparatus comprises a mixing means for mixing the thermoplastic minipellets in water to form a slurry, which is connected to a pressurizing means to form a flow of pressurized slurry to a junction which in trains a blowing agent to form a pressurized slurry mixture, which is connected to a heating means to heat the pressurized slurry mixture. Once the pressurized slurry mixture is impregnated with the blowing agent, it flows through water more orifice plates for expansion of thermoplastic minipellets into an expansion vessel.