Browse Prior Art Database

Vacuum Transport

IP.com Disclosure Number: IPCOM000050273D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Barker, RB: AUTHOR

Abstract

Attachment of a flexible sheet to a vacuum transport as it departs a curved path is assured by configuring the vacuum transport with a sloped face for intercepting normal sheet detachment.

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Vacuum Transport

Attachment of a flexible sheet to a vacuum transport as it departs a curved path is assured by configuring the vacuum transport with a sloped face for intercepting normal sheet detachment.

In Fig. 1, sheet 10 is carried by a belt 11, such as a photoconductor belt for a xerographic copier, around a roller 12. The geometry assumed by sheet 10 is dependent upon its beam strength primarily, but a xerographic machine influences the geometry with electrostatic forces as well as roll diameters. Sheet 10 is intended to attach to vacuum transport 15 for withdrawal on belt 16. At some distance X, deflection of sheet 10 equals the radius R of roll 12, and sheet 10 reattaches to belt 11 or roll 12. Optimum geometry for the transport utilizes the natural beam strength of sheet 10, resulting in natural detachment from roll
12. Successful transfer to transport 15 requires the location of belt 16 in close proximity to drum or roll 12 and a relatively high vacuum in transport 15.

In Fig. 2, the vacuum transport 20 configuration utilizes sheet 10 beam strength to detach it from roll 12 and/or conveyor belt 11 while reducing the magnitude of vacuum required within transport 20. Transport 20 includes a sloped face 21 to retain transport belt 22 in an intercepting position relative to the natural detachment movement of sheet 10, whereas, at surface 23, the vacuum transport continues towards the intended destination in a horizontal direction. This configuration reduce...