Browse Prior Art Database

Compensating Hopper

IP.com Disclosure Number: IPCOM000093774D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Schweis, JJ: AUTHOR

Abstract

In order to feed documents one at a time from the top of a stack of documents, it is necessary to maintain the uppermost document level and within a height range to enable the documents to be fed properly. Documents having an address label or other attachments at one end of the document form a stack which is twice as thick at the one end than at the other. To compensate for this hopper bed 10 in its fully down position is tilted sufficiently so that the top document is horizontal. Spring 12 urges 10 against stop 11.

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Compensating Hopper

In order to feed documents one at a time from the top of a stack of documents, it is necessary to maintain the uppermost document level and within a height range to enable the documents to be fed properly. Documents having an address label or other attachments at one end of the document form a stack which is twice as thick at the one end than at the other. To compensate for this hopper bed 10 in its fully down position is tilted sufficiently so that the top document is horizontal. Spring 12 urges 10 against stop 11.

After a predetermined number of documents is fed from the stack by picker belt 13, it is necessary to raise the stack of documents to again bring the uppermost document to the proper level. Sensing arm 14 detects the change in stack height and operates an air valve 15 to admit air into cylinder 16. This causes piston rod 17 to extend upwardly so that cable 18 fixed at one end to a stationary surface 19 and at its other end to 10 and trained about pulleys 20 is moved to raise 10.

A second cable 21 is attached at one end to arm 22 trained about pulley 23 and attached at its other end to the rear portion of 10. Cable 21 moves the same distance as 17. Cable 18, however, moves twice the distance of 17. As 18 moves, 10 is raised. As 21 moves, 10 is tilted toward the horizontal in opposition to the action of 12 to maintain the top document horizontal.

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