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SHEET STACKER TRAY: OSCILLATION SERRATIONS

IP.com Disclosure Number: IPCOM000025939D
Original Publication Date: 1989-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 88K

Publishing Venue

Xerox Disclosure Journal

Abstract

In an uphill sheet stacker, the effect of upwards or downwards curl on the copy sheets is reduced, in order to increase the capacity of the stacker, by causing the bottom (trail) edges of the stacked sheets to be contacted by reciprocating slides offering differential friction to the sheet edges.

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XEROX DISCLOSURE JOURNAL

SHEET STACKER TRAY: Proposed Classification OSCILLATING SERRATIONS U.S. C1.271
S. R. Hamilton Int. C1. E65h

10 8

2

FIG. 1

Volume 14 Number 2 March/April 1989

NG. 2

41

[This page contains 1 picture or other non-text object]

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SHEET STACKER TRAY: OSCILLATING SERRATIONS (Cont'd)

In an uphill sheet stacker, the effect of upwards or downwards curl on the copy sheets is reduced, in order to increase the capacity of the stacker, by causing the bottom (trail) edges of the stacked sheets to be contacted by reciprocating slides offering differential friction to the sheet edges.

Figure 1 is a bird's eye view of the stacker. It shows the main stack tray 2, which is inclined at an angle of about 53 degrees to the horizontal. Projecting upwardly from its lower end is a stepped wall 4. Sheets are fed onto the tray over the top of the wall 4 in a direction shown by arrow 6. Their entry speed is such that the trail edge of each sheet passes over the wall before gravity brings each sheet substantially parallel and close to the support surface 8 of the tray 2, and causes it to slide backwards until it5 former trail edge comes to rest against wall 4. Normally its first contact is with surface 10 of wall 4: this is positioned off-center of the trail edge, so that gravity causes each sheet to swivel until the other end of its trail edge comes into contact with either surface 12 or surface 14. The whole device shown in Figure 1 is translatable lateral...