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Browse Prior Art Database

Vacuum Paper Drive

IP.com Disclosure Number: IPCOM000089213D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Stroh, RD: AUTHOR

Abstract

This vacuum paper drive is particularly useful in a copier, where it is used to drive a sheet of paper to a paper registration gate. Thereafter, release of the gate allows the paper to progress to the copier's transfer station.

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Vacuum Paper Drive

This vacuum paper drive is particularly useful in a copier, where it is used to drive a sheet of paper to a paper registration gate. Thereafter, release of the gate allows the paper to progress to the copier's transfer station.

A sheet of paper 10 is guided between two stationary, metal-plate paper guides 11 and 12. Guide 11 includes a number of openings defined by guide rails 13. Each of these openings is occupied by a hollow perforated tube 14. Each tube 14 is of an exemplary length of fifteen inches. Each of the tubes 14 rotates about a stationary central axis 15. The hollow interior of each tube 14 communicates with a source of subatmospheric pressure, so as to cause the paper sheet to deform, as at 16, and to be driven in direction 17.

When the leading edge of the sheet is momentarily stopped by the copier's paper registration gate (not shown), tubes 14 rotate against the stationary sheet. However, the low forces provided by this vacuum paper drive prevent marking of the paper, and the airflow accompanying the subatmospheric pressure carries away any paper dust which may result.

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