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Minimizing Temperature Gradients in a Fuser Foil

IP.com Disclosure Number: IPCOM000088517D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Kluth, A: AUTHOR [+2]

Abstract

A fuser roll is shown which minimizes the thermal gradient present on the fuser roll, and this improved heat distribution significantly improves quality.

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Minimizing Temperature Gradients in a Fuser Foil

A fuser roll is shown which minimizes the thermal gradient present on the fuser roll, and this improved heat distribution significantly improves quality.

The fuser roll comprises a thin-walled cylinder member 10 which has a pair of end members 12 that are press-fit into recesses in the ends of the cylinder member 10. End members 12 have a conical section 14 angled outward, and these sections provide an opening for a radiant energy source, such as an IR lamp. In operation, the outer surface of cylinder 10 may be covered by a thin rubber coating and be placed in contact with an unfused toner image so that the heat absorption from the hot roll ceiling forces the toner image to an image sheet as the sheet is fed between the heated roll and a backup roll as the rolls are rotated.

By selectively providing reflecting surface and absorbing surface on the ends of the roll, the temperature gradient along the roll surface, while in the operating mode, can be closely controlled. In addition, the reflector geometry can be used to control exactly the length of the heated zone on the cylinder roll surface.

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