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Ramp Counterbalance for Document Stacker

IP.com Disclosure Number: IPCOM000082682D
Original Publication Date: 1975-Jan-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Johnson, TL: AUTHOR

Abstract

Equipment for stacking documents, such as mail pieces on a ramp, requires counterbalancing the widely varying weight and depth of the stacked documents with a force which is not too small to maintain the integrity of the stack, yet not too great to facilitate the insertion of additional documents into the stack.

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Ramp Counterbalance for Document Stacker

Equipment for stacking documents, such as mail pieces on a ramp, requires counterbalancing the widely varying weight and depth of the stacked documents with a force which is not too small to maintain the integrity of the stack, yet not too great to facilitate the insertion of additional documents into the stack.

In the side view of stacker 10, a document stack 11 (shown in phantom) rests upon a ramp 12. Additional documents are inserted into the stack at its upper end 13 by a transport, not shown. The lower end of the stack is restrained by a flat plate 14, which is affixed to a bearing block 15 riding on a round guide rod 16. Proper counterbalancing force is provided by an assembly affixed to bearing block 15. Depending arm 17 carries a pin 18 for attaching one end of a spring 19. The other end of this spring is attached to a pin 20 on arm 21, whose upper end is pivotally mounted on arm 17 by pin 22. The lower end of arm 21 has a pin 23 which allows wheel 24 to rotate along a grooved track 25.

Track 25 is mounted at an angle to ramp 12. Thus, as additional documents inserted into stack 11 force plate 14 downward along the ramp, arm 21 is constrained by track 25 to swing upwardly. This extends spring 19, to provide an increasing upward force to plate 14, by way of arm 17 and block 15. Extension spring 19 may be replaced by a torsional spring or other types of spring, if desired. Moreover, track 25 need not be straight; it...