Browse Prior Art Database

TRAY BRAKE

IP.com Disclosure Number: IPCOM000026504D
Original Publication Date: 1992-Jun-30
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 116K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a tray brake concept for use in a paper tray containing paper which is to be imaged upon, a retard pad and a feedroll. Figure 1 shows tray brake system 10 as viewed from the paper tray. The function of system 10 is to keep paper in the paper tray from following the feedroll as it moves up and away from the retard pad.

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XEROX DISCLOSURE JOURNAL

TRAY BRAKE

C1.355/319 U.S. Proposed Gerald M. Garavuso Classification

Int. C1. G03g 21/00

76 74 1

FIG. 7

XEROX DISCLOSURE JOURNAL - Vol. 17, No. 3 May/June 1992 167

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TRAY BRAKE(Cont'd)

Disclosed is a tray brake concept for use in a paper tray containing paper which is to be imaged upon, a retard pad and a feedroll. Figure 1 shows tray brake system 10 as viewed from the paper tray. The function of system 10 is to keep paper in the paper tray from following the feedroll as it moves up and away from the retard pad.

A flat, vertical blade projection 12 extends from the downstream edge of the paper tray. Blade 12 is placed between two friction plates 14, 16. Plate 14 is stationary while plate 16 is free to swing on identical pivot arms 18, 20. Pivot arms 18,20 maintain plate 16 parallel with plate 14 and are long enough such that plate 14 is contacted by plate 16 as it rises. Thereby, the travel of plate 16 is limited. Plate 16 is spring loaded toward plate 14. Further, the top of plate 16 is also in contact with the downstream end of a pivoting retard pad in the paper tray.

In operation, springs under the paper tray cause the tray and blade 12, located between plate 14 and plate 16, to rise. Since swinging plate 16 is spring loaded against blade 12, the resulting friction force causes blade 12 to be pinched between plate 14 and plate 16 by the cramming action of pivoting arms...