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Browse Prior Art Database

Vacuum Transport Paper Aligner

IP.com Disclosure Number: IPCOM000045024D
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Gibson, DK: AUTHOR

Abstract

Cut sheet paper is brought into registry with a reference edge by selective control of dual vacuum-transport segments along with buckle refeeding. The device is useful for copy sheet aligning in recirculating document feeds, duplex sheet paper paths, and the like in xerographic copier/ duplicator/ printer environments.

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Vacuum Transport Paper Aligner

Cut sheet paper is brought into registry with a reference edge by selective control of dual vacuum-transport segments along with buckle refeeding. The device is useful for copy sheet aligning in recirculating document feeds, duplex sheet paper paths, and the like in xerographic copier/ duplicator/ printer environments.

Copy sheets, such as 10 and 11, are carried by dual vacuum-transport belts 15 and 16. Reference edge 20 has a sloped entry face 21. Belts 15 and 16 are driven over a vacuum plenum, as is conventional, to hold the sheets on belts 10 and 11 as they move in the direction 12. The vacuum is removed from belt 15 in the area indicated at 25. Thus, sheet 10 buckles as shown in the side view of Fig. 2. The upper edge of sheet 10 is free to conform to the reference edge 20. As the sheet moves from the position of sheet 10 to the position of sheet 11, vacuum is initially returned to belt 15 as it leaves zone 25 and eventually vacuum is removed from belt 16 as it enters zone 30. The column or beam strength of the paper, together with a support plate under zone 30, straightens the sheet by an amount 33 as it removes the buckle shown in Fig. 2.

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