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:
Sep. 28, 1999
Filed:
Aug. 28, 1998
Kamran U Zaman, Pittsford, NY (US);
George A Schutt, Pittsford, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A silencer including a hollow tube having, in the free state a predetermined inside diameter, the tube including a tube wall having a substantially uniform thickness, an interior surface, a hard exterior surface at least one groove extending axially of the tube, the groove having a depth that is less than the thickness of the tube wall and a slot in the wall extending axially of the tube, and at least one partially compressed high density polymeric open cell foam plug in the interior of the hollow tube, the plug having in the uncompressed state a substantially circular cross section in at least one plane, the circular cross section of the plug having an outside diameter sufficient to increase the inside diameter of the hollow tube to a diameter at least about 5 percent greater than the predetermined inside diameter of the hollow tube in the free state. The hollow tube portion of the silencer may be recovered from a used hollow photoreceptor drum, combined with a high density polymeric open cell foam plug and installed in a fresh hollow photoreceptor drum.