Browse Prior Art Database

WRINKLE CONTROL ROLLS

IP.com Disclosure Number: IPCOM000025078D
Original Publication Date: 1983-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to minimizing paper wrinkling when toner images are fused to a copy substrate by passing them through a roll fuser. Paper wrinkle occurs due to moisture induced waviness when the waviness becomes too large to be accommodated by the roll fuser. Accordingly, by reducing the degree of waviness of the paper prior to its entry into the fuser nip the tendency for paper wrinkling can be reduced. It is desirable from a paper handling standpoint to locate the wrinkle control device after the nip. This is disclosed in the figure, a roll fuser comprising rolls 10 and 12 through which copy sheets 14 carrying electrostatically adhered powder images are passed for fusing the powder images to the sheets. A wrinkle control device in the form of a roll 16 is positioned in the post nip area of the fuser. The roll 16 is provided with a spiralled protusion on each side thereof which cooperate to stretch the paper outwardly in the direction perpendicular to its direction of movement.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

WRINKLE CONTROL ROLLS
C. Joseph Wong John R. Field

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Proposed Classification US. C1. 29/110
Int. Cl. B21b 13/02

Volume 8 Number 4 July/August 1983

289

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Page 2 of 2

WRINKLE CONTROL ROLLS (Cont'd)

This disclosure relates to minimizing paper wrinkling when toner images are fused to a copy substrate by passing them through a roll fuser. Paper wrinkle occurs due to moisture induced waviness when the waviness becomes too large to be accommodated by the roll fuser. Accordingly, by reducing the degree of waviness of the paper prior to its entry into the fuser nip the tendency for paper wrinkling can be reduced. It is desirable from a paper handling standpoint to locate the wrinkle control device after the nip. This is disclosed in the figure, a roll fuser comprising rolls 10 and 12 through which copy sheets 14 carrying electrostatically adhered powder images are passed for fusing the powder images to the sheets. A wrinkle control device in the form of a roll 16 is positioned in the post nip area of the fuser. The roll 16 is provided with a spiralled protusion on each side thereof which cooperate to stretch the paper outwardly in the direction perpendicular to its direction of movement.

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  XEROX DISCLOSURE JOURNAL Volume 8 Number 4 July/August 1983

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