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. 08, 1993
Filed:
Jun. 03, 1991
Applicant:
Inventor:
Alan Seville, Indianapolis, IN (US);
Assignee:
Cabot Safety Corporation, Southbridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 51 ; 264 453 ; 264161 ;
Abstract
A method for molding a scrubbing sponge wherein raw materials are added a mold cavity having a bottom half and a top half having at least one cavity connected to a venting portion. The raw materials are foamed and expanded to pass through the cavity and vent until flashing is formed on the top of the mold. As the foam passes through the cavity and vent during the foaming cycle, it will become progressively denser as a result of the restrictive flow leading to the small opening of the vent.