Browse Prior Art Database

Timing Apparatus for Document Feeding

IP.com Disclosure Number: IPCOM000090709D
Original Publication Date: 1969-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Krause, KA: AUTHOR [+2]

Abstract

Registration station 1 of a reproduction system is for positioning a paper sheet 2 in the proper position and timing relationship so that it is properly aligned when brought into contact with the photosensitive element of the reproduction system. Station 1 comprises a stationary flat surface under which is located two separate chambers 3 and 4, connected through valves 5 to either vacuum or atmospheric pressure. Disposed with the flat surface is a sheet edge position sensor 6 to provide an input for activating valves 5. A moving perforated thin belt 7 continuously passes above chambers 3 and 4. Prior to entry of sheet 2 into station 1, valves 5 are actuated such that chamber 3, first to be reached by the paper, is connected to atmospheric pressure and chamber 4 is connected to a vacuum source.

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Timing Apparatus for Document Feeding

Registration station 1 of a reproduction system is for positioning a paper sheet 2 in the proper position and timing relationship so that it is properly aligned when brought into contact with the photosensitive element of the reproduction system. Station 1 comprises a stationary flat surface under which is located two separate chambers 3 and 4, connected through valves 5 to either vacuum or atmospheric pressure. Disposed with the flat surface is a sheet edge position sensor 6 to provide an input for activating valves 5. A moving perforated thin belt 7 continuously passes above chambers 3 and 4. Prior to entry of sheet 2 into station 1, valves 5 are actuated such that chamber 3, first to be reached by the paper, is connected to atmospheric pressure and chamber 4 is connected to a vacuum source. Sheet 2 is attracted to belt 7 by the vacuum connected to chamber 4. Sheet 2 is transported at belt velocity until the leading edge is sensed by sensor 6. At this time, valves 5 are switched to connect chamber 4 to atmospheric pressure and chamber 3 to a vacuum source. This causes sheet 2 to be attracted to the surface of station 1 and released from belt 7. With the driving force removed, sheet 2 decelerates and stops. Sheet 2 then can be held in station 1, as required, for sheet feed timing. To restart the feeding of sheet 2, valves 5 are switched to connect chamber 4 to vacuum and chamber 3 to atmospheric pressure. Sheet 2 is then rel...