Browse Prior Art Database

STACK HEIGHT SENSOR FOR JOB COMPLETION DETECTION

IP.com Disclosure Number: IPCOM000027183D
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 112K

Publishing Venue

Xerox Disclosure Journal

Abstract

A stack height sensor for job completion detection is disclosed. The present disclosure is suitable in a system using an Automatic Document Feeder (ADF) which does not have a set separator finger, and also is applicable to light lens products as well as to scanners.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 55% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

~~

STACK HEIGHT SENSOR FOR JOB COMPLETION DETECTION U.S. C1.355/321 Thomas Acquaviva

Proposed Classification

Int. Cl. G03g 21/00

. 10

FIG. I

XEROX DISCLOSURE JOURNAL - Vol. 20, NO. 4 Jdy/August 1995 345

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

Page 2 of 4

STACK HEIGHT SENSOR FOR JOB COMPLETION DETECTION

(Cont'd)

20

FIG. 2

346 XEROX DISCLOSURE JOURNAL - Voi. 20, NO. 4 July/August 1995

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

Page 3 of 4

STACK HEIGHT SENSOR FOR JOB COMPLETION DETECTION

(Cont'd)

A stack height sensor for job completion detection is disclosed. The present disclosure is suitable in a system using an Automatic Document Feeder (ADF) which does not have a set separator finger, and also is applicable to light lens products as well as to scanners.

A series of optical sensors 20 are aligned vertically and arranged for reflective sensing by bounding light off the edge of stack 10 as shown in Figure 1. the sensor is located behind and flush with registration wall 30 and abuts the document stack. The higher the stack, the more receivers will detect reflected light, thereby giving a good approximation of stack height.

A light weight, cantilevered arm 70 and roller 1, pivoted above the stack inside the feeder throat, and attached to an encoder disk 50 is shown in Figure 2. Initially, the arm pivots upward and a sensor counts pulses created by encoder disk 50. The more pulses detected, the higher the stack.

R...