Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

RIBBED GROOVES FOR VBH PLENUM

IP.com Disclosure Number: IPCOM000025983D
Original Publication Date: 1989-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 56K

Publishing Venue

Xerox Disclosure Journal

Abstract

Certain known vacuum document handlers for copiers have plural non-porous sheet transporting belts covering and moving over partially evacuated pneumatic grooves in a plenum surface overlying the copier platen. Smaller transverse grooves may then apply the partial vacuum from these main vacuum grooves out from under the belt edges to the areas between the belts to attract a sheet to the belts. E.g., U.K. Application No. 8800720 filed Jan. 13, 1988 by Peter Roy Watson.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

I

RIBBED GROOVES FOR VBH Proposed Classification PLENUM US. C1.355/14SH Gerald M. Garavuso Int. C1. G03g 15/00

Certain known vacuum document handlers for copiers have plural non-porous sheet transporting belts covering and moving over partially evacuated pneumatic grooves in a plenum surface overlying the copier platen. Smaller transverse grooves may then apply the partial vacuum from these main vacuum grooves out from under the belt edges to the areas between the belts to attract a sheet to the belts. E.g., U.K. Application No. 8800720 filed Jan. 13, 1988 by Peter Roy Watson.

Mere, thin upstanding supporting ribs may be provided extending centrally along these main vacuum grooves for continuously supporting the backs of these belts, without interfering with the partial vacuum airflow. These ribs extend up from the bottom of the vacuum grooves to prevent the belts from being sucked down into the grooves and sagging into a concave shape. Preferably, the upper surfaces of these ribs extend up uniform1 slight1 above

curving towards the plenum surface, at the area of the smaller transverse grooves, and thereby reduce undesirable belt edge shadows.

the plenum surface level, to hold the belts sightly convex, wit

ir the be t edges

Volume 14 Number 3 May/June 1989 151

[This page contains 1 picture or other non-text object]

Page 2 of 2

XEROX 152 DISCLOSURE JOURNAL

Volume 14 Number 3 May/June 1989

[This page contains 1 picture or other non-text obj...