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DYNAMIC SHEET CORRUGATION MEASUREMENT TECHNIQUE

IP.com Disclosure Number: IPCOM000026985D
Original Publication Date: 1994-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 91K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for the measurement or testing of the degree of corrugation induced in paper sheets, such as that induced between a pair of sheet feeding nips in a copier or printer. This measurement allows the quantifying of improvements or adjustments for manufacturing or the like. In particular, overcoming problems caused by corrugations induced in paper path nips sets by "steering" in between a pair of nips trapping the corrugation, similar to the action of cross rolls. This can create a paper buckle which can cause the sheet to jam in the subsequent baffles or gates.

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XEROX DISCLOSURE JOURNAL

DYNAMIC SHEET CORRUGATION Proposed Classification MEASUREMENT TECHNIQUE U.S. C1.355/311 Kenneth P. Moore Int. C1. G03g 21/00

A method for the measurement or testing of the degree of corrugation induced in paper sheets, such as that induced between a pair of sheet feeding nips in a copier or printer. This measurement allows the quantifying of improvements or adjustments for manufacturing or the like. In particular, overcoming problems caused by corrugations induced in paper path nips sets by "steering" in between a pair of nips trapping the corrugation, similar to the action of cross rolls. This can create a paper buckle which can cause the sheet to jam in the subsequent baffles or gates.

The measurement system here involves scribing a fine line in the circumference of each nip idler roller of the pair where input corrugation versus output Corrugation is to be measured. This may be done, for example, by holding a jeweler's file against the idler roller at any point in pinch contact with the drive roll, to form a fine scribe line on the roller surface. This scribe line must not present any raised surfaces which may affect skew or corrugation, merely a recess. Measurement of induced corrugation on test sheets of paper is then measured by holding an ink source such as a felt tip ink marker against each of the idlers overlying this scribed area as the system operates. The ink transfers to the paper as it passes through the nip set, leaving an...