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Picking Paper With Pneumatic Pick Boots in a Recirculating Automatic Document Feeder System

IP.com Disclosure Number: IPCOM000035800D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Chandler, RO: AUTHOR [+3]

Abstract

This article describes an apparatus for providing a tailored angular relationship between the pneumatic pick boots and the top of the document stack in a recirculating automatic document feeder system. This allows a much larger latitude in the design and placement of the document stack support component(s), and empirical test results indicate improved document picking reliability with reduced double sheet picks. Refer to the figure for nomenclature and component identification.

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Picking Paper With Pneumatic Pick Boots in a Recirculating Automatic Document Feeder System

This article describes an apparatus for providing a tailored angular relationship between the pneumatic pick boots and the top of the document stack in a recirculating automatic document feeder system. This allows a much larger latitude in the design and placement of the document stack support component(s), and empirical test results indicate improved document picking reliability with reduced double sheet picks. Refer to the figure for nomenclature and component identification.

The paper-picking device is a four-bar linkage consisting of a frame, link A, link B, and a carrier. There are two four-bar linkages per feed system, referred to as the front and rear. The front link A is driven via a cam from a stepper motor, and the rear link A is driven via a jack shaft attached to the front link A. Attached to each carrier is a pair of pick boots and a pair of bellows which attach to a vacuum source.

To pick a sheet of paper, the stepper motor, via the cam, drives the carriers down until contact with the stack is made. Contact with the stack is sensed by a pressure switch which monitors the vacuum source and senses an increase in vacuum. This information is used to initiate upward travel of the pick boots with the sheet of paper attached. When the four-bar linkage reaches the transfer position, the paper is transferred to a vacuum transport belt system which is located between t...