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:
Jun. 15, 1993
Filed:
Mar. 13, 1992
Applicant:
Inventors:
Wilfred Parent, Milton, NH (US);
Laurent R Gaudreau, South Berwick, ME (US);
Assignee:
Davidson Textron Inc., Dover, NH (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24C / ;
U.S. Cl.
CPC ...
51319 ; 51410 ; 51428 ;
Abstract
Molded urethane articles (10) are deflashed by impinging or shooting particles (14) of polyvinyl chloride at the flash (18) which develops between the seams of the mold parts. The polyvinyl chloride particles (14) are random in shape and have a maximum cross-sectional measure of 0.125 inches. The polyvinyl chloride particles (14) are set in motion using a blast of air produced by a particle blaster (12). The polyvinyl chloride particles (14) have a hardness range (50-85 Shore A durometer) which is hard enough to deflash articles made of semi-rigid urethane and, yet, soft enough not to damage a polyvinyl chloride cone.