Browse Prior Art Database

DOCUMENT HANDLER STACK SENSOR

IP.com Disclosure Number: IPCOM000024662D
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 71K

Publishing Venue

Xerox Disclosure Journal

Abstract

In automatic recirculating document handlers, a set separating finger or bail bar system 1 is used to separate or distinguish those documents to be fed from those which have been returned to the document tray following the copy operation. A finger or bail 2 normally rests on the stack 3 lightly and moves down with gravity as sheets are fed out from under the finger 2. When the finger 2 is no longer over any documents it drops 2a to activate a switch 4 which signifies that all the documents have been copied. It is then automatica!ly reset to the top of the stack, as shown in solid line, to initiate another feed cycle, by a solenoid or other mechanism (not shown) which pivots the unit 1 about axis 1A back to dashed line position 2b and then up to the reset position. By employing a stack height sensor 5 actuated by an extension 6 of the same bail system, the reset position of the finger 2 on the top of the stack can be utilized to give an indication of the stack height for automatically adjusting vacuum, air, or normal pressures in the document feeder to compensate for the weight (height) of the stack. Here this is accomplished by allowing a limited degree of pivotability with variations in stack height of the arm unit 2, 6 about an axis 1B so as to variably position arm 6 relative to sensor 5 depending on the stack height illustrated by dashed position 2c. More than one sensor 5 can be provided in the various potential reset positions of the arm 6.

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 82% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

DOCUMENT HANDLER STACK SENSOR Proposed SteDhen J. Wenthe, Jr. Classification

U.S. CI. 27 U3.1

Int.Cl. B 65h 5/22

-3

In automatic recirculating document handlers, a set separating finger or bail bar system 1 is used to separate or distinguish those documents to be fed from those which have been returned to the document tray following the copy operation. A finger or bail 2 normally rests on the stack 3 lightly and moves down with gravity as sheets are fed out from under the finger 2. When the finger 2 is no longer over any documents it drops 2a to activate a switch 4 which signifies that all the documents have been copied. It is then automatica!ly reset to the top of the stack, as shown in solid line, to initiate another feed cycle, by a solenoid or other mechanism (not shown) which pivots the unit 1 about axis 1A back to dashed line position 2b and then up to the reset position. By employing a stack height sensor 5 actuated by an extension 6 of the same bail system, the reset position of the finger 2 on the top of the stack can be utilized to give an indication of the stack height for automatically adjusting vacuum, air, or normal pressures in the document feeder to compensate for the weight (height) of the stack. Here this is accomplished by allowing a limited degree of pivotability with variations in stack height of the arm unit 2, 6 about an axis 1B so as to variably position arm 6 relative to sensor 5 depending on the stack height illu...