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:
May. 04, 1976
Filed:
Nov. 20, 1974
Arthur J Wiltshire, Richmond Heights, OH (US);
Henry U Ranallo, Euclid, OH (US);
Structural Fibers, Inc., Chardon, OH (US);
Abstract
A machine and method for detecting and identifying the approximate location of air leak-causing defects in flat, thin rubber stock used to manufacture inflatable, expandable bags. The detection of air leak-causing defects is accomplished by continuously moving at a relatively constant rate the flat rubber stock to be tested between two cylindrical rollers. These two rollers are maintained at a voltage which will fluctuate in response to any air leak-causing defect passing between them. The machine disclosed is composed of a frame to which is mounted a feed spool and a take-up spool, numerous supports and guides, a set of two test rollers, a dielectric analyzer, and a marker which punches the edge of the rubber stock adjacent to the in-line location of a detected defect. The disclosed machine and method enable detection of small pin-hole sized defects often undetectable to the naked eye.