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Browse Prior Art Database

NOISE REDUCTION BEARING GROMMET

IP.com Disclosure Number: IPCOM000027157D
Original Publication Date: 1995-Jun-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 109K

Publishing Venue

Xerox Disclosure Journal

Abstract

A low cost device for reducing the audible noise level generated from movable sheet metal gates or baffles in a xerographic copying or printing machine is disclosed. The proposed device provides a bearing membedelastomer grommet combination which is mounted into a side plate for receiving the pivot pin of a metal gate to reduce the clearance between the pivot pin and the side plate, thereby isolating the bearing/grommet from the side plate.

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XEROX DISCLOSURE JOURNAL

NOISE REDUCTION BEARING Proposed Classification GROMMET U.S. C1.384/276 Erwin Ruiz
Int. Gerald
R. Curry C1. F16c 33/02

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FIG. 2

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XEROX DISCLOSURE JOURNAL - Vol. 20, No. 3 May/June 1995 287

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NOISE REDUCTION BEARING GROMMET (Cont'd)

A low cost device for reducing the audible noise level generated from movable sheet metal gates or baffles in a xerographic copying or printing machine is disclosed. The proposed device provides a bearing membedelastomer grommet combination which is mounted into a side plate for receiving the pivot pin of a metal gate to reduce the clearance between the pivot pin and the side plate, thereby isolating the bearing/grommet from the side plate.

An exploded view of a conventional sheet transport apparatus is shown in the accompanying figure. The sheet transport apparatus includes a gate member 6 which is assembled within a machine frame with a pivot pin 7 coupled into a side plate 8 such that the gate 6 rotates about a pivot axis. This exemplary metal gate is commonly actuated by a solenoid which rotates the gate about the pivot axis formed by pivot pin 7. The gate has inherent stop points at the points of contact between the gate 6 and the side panel 8. As the gate 6 strikes the side panel 8, the kinetic energy of the rotational movement of the gate 6 is dissipated into the materials of the side panel 8. The dissipation of energy into the side panel generates gate impulse noise, which, in some cases, can be as high as 76db. This noise level...