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Browse Prior Art Database

SHEET REGISTRATION USING TWO VARIABLE VELOCITY ROLLS

IP.com Disclosure Number: IPCOM000027604D
Original Publication Date: 1998-Feb-28
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is an apparatus for positioning a copy sheet during transition through a transport by using two variable velocity nip rolls. As shown in the accompanying figure, a double differential roll velocity system 10 steers or locates copy sheet 22 as shown by arrow 30. A first roll 16 driven by motor 18 accelerates or decelerates (depending on the desired

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XEROX DISCLOSURE JOURNAL

SHEET REGISTRATION USING TWO VARIABLE VELOCITY ROLLS
Paul N. Richards
Kenneth B. Mahon

Proposed Classification
U. S. C1.399/361 Int. C1. G03g 21/00

Proposed is an apparatus for positioning a copy sheet during transition through a transport by using two variable velocity nip rolls. As shown in the accompanying figure, a double differential roll velocity system 10 steers or locates copy sheet 22 as shown by arrow 30. A first roll 16 driven by motor 18 accelerates or decelerates (depending on the desired

XEROX DISCLOSURE JOURNAL - Vol. 23, No. 1 JanuaryEebruary 1998 47

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SHEET REGISTRATION USING TWO VARIABLE VELOCITY ROLLS (CONT'D)

direction of sheet 22) for a given period of time. A second roll 20 driven by motor 12 responds in a similar manner, equal and opposite to the first roll 16. The interaction between rolls 16 and 20 creates a shift A in the location of sheet 22.

REFERENCES

U.S. Patent No. 4,971,304 issued November 20, 1990 to Xerox Corporation entitled, "Apparatus And Method For Combined Deskewing And Side Registering."

U.S. Patent No. 5,078,384 issued January 7, 1992 to Xerox Corporation entitled, "Combined Differential Deskewing And Non-Differential Registration Of Sheet Material Using Plural Motors."

DP5663

48 XEROX DISCLOSURE JOURNAL, - Vol. 23, No. 1 JanuarylFebruary 1998

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