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Browse Prior Art Database

STACK HEIGHT SENSOR

IP.com Disclosure Number: IPCOM000025303D
Original Publication Date: 1984-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 68K

Publishing Venue

Xerox Disclosure Journal

Abstract

A stack height sensor 80 for combination with a pivoting feed head assembly (not shown) is disclosed in Figure 1 and is adapted for movement by a member 89 that is moved by the pivoting feed head assembly in order to maintain a predetermined normal force of a feed belt against a stack of sheets supported by an elevator. As shown in Figure 1, the stack height sensor includes a housing 83 for a plunger 81 with drag forces on the plunger being controlled by clearences, part finish and material selection. The plunger is mounted within the housing under pressure from compression spring 84 that is adjustable by screw member 85. An actuator 87 is mounted for movement with the plunger 81 and has a flag portion 86 attached thereto which, as it moves in a linear direction, blocks and unblocks optoelectrical sensor 88 as shown in Figure 1A. The unblocking of the sensor causes actuation of a motor to raise the elevator and maintain the predetermined normal force of the feed device against the stack of sheets.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

STACK HEIGHT SENSOR Raymond A. Povio

Proposed Classification
U.S. C1. 271/765 Int. C1. R65h 7/02

Volume 9 Number 4 July/August 1984 245

86

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Page 2 of 2

STACK HEIGHT SENSOR (Cont'd)

A stack height sensor 80 for combination with a pivoting feed head assembly (not shown) is disclosed in Figure 1 and is adapted for movement by a member 89 that is moved by the pivoting feed head assembly in order to maintain a predetermined normal force of a feed belt against a stack of sheets supported by an elevator. As shown in Figure 1, the stack height sensor includes a housing 83 for a plunger 81 with drag forces on the plunger being controlled by clearences, part finish and material selection. The plunger is mounted within the housing under pressure from compression spring 84 that is adjustable by screw member 85. An actuator 87 is mounted for movement with the plunger 81 and has a flag portion 86 attached thereto which, as it moves in a linear direction, blocks and unblocks optoelectrical sensor 88 as shown in Figure 1A. The unblocking of the sensor causes actuation of a motor to raise the elevator and maintain the predetermined normal force of the feed device against the stack of sheets.

XEROX 246 DISCLOSURE JOURNAL

Volume 9 Number 4 July/August 1984

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