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NEUMATICALLY ACTUATED SWITCH

IP.com Disclosure Number: IPCOM000022871D
Original Publication Date: 1976-Mar-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

A switch located in a paper transport to detect the presence of a sheet of paper thereon, Endless belt 12 advances sheet 16 over frame 14, A vacuum is generated in frame 14, Belts 12 have holes therein. As the paper 16 advances, it passes over portion 10 of frame 14. This produces a vacuum in that portion of the frame, A disc 20 is located in portion 10 of frame 14. One end portion of actuator 22 engages disc 20, The other end portion of actuator 22 is connected to switch 24. In operation, lead edge 18 of paper 16 moves across portion 10 of frame 14. This produces a vacuum in portion 10 resulting in actuator 22 resiliently urging disc 20 in an upward direction, As actuator 22 moves in an upward direction switch 24 is closed indicating the presence of paper 16 in region 10 of frame 14. A jam is indicated when switch 24 remains actuated for a time period longer than a pre-selected duration,