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:
Mar. 30, 1976
Filed:
Dec. 06, 1974
Applicant:
Inventor:
Norris J Carlson, Santa Ana Heights, CA (US);
Assignee:
California Injection Molding Company, Inc., Costa Mesa, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 37 ; 73 375 ;
Abstract
In the injection molding of elongated thin walled articles, air within the mold escapes from the mold cavity through vent orifices in the cavity and in an elongated core positioned within the cavity. To determine whether critical mold venting is within desired tolerances, a relatively high pressure gas is applied to the vent orifice and pressure is allowed to decay by escape through the orifice. Time required for a predetermined magnitude of pressure drop is measured and employed as an indication of vent orifice acceptability.