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Stress Alleviating Back-Up Roll

IP.com Disclosure Number: IPCOM000049113D
Original Publication Date: 1982-May-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Chang, JP: AUTHOR

Abstract

This article describes a back-up roll suitable for use in the hot roll fusing station of a convenience copier. The back-up roll has a tapered surface with relief surfaces fabricated in its ends.

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Stress Alleviating Back-Up Roll

This article describes a back-up roll suitable for use in the hot roll fusing station of a convenience copier. The back-up roll has a tapered surface with relief surfaces fabricated in its ends.

Fig. 1 shows a hot roll fusing station comprising a back-up roll (BUR) and a hot roll disposed in spaced relationship to the BUR.

In operation, the BUR is driven in the direction shown by the arrow.

The surface velocity of the BUR transports a sheet of paper through the nip formed between the BUR and the hot roll. As the paper passes through the nip, the heat energy emanating from the hot roll fuses the microscopic toner (not shown) into the fiber of the paper to form a permanent image thereon.

Fig. 2 shows a pictorial view of the back-up roll. The back-up roll has a concave geometry in its center and tapers toward the ends. A plurality of relief surfaces are machined in each end of the roll.

When a sheet of paper is transferred through a hot fusing station wherein the back-up roll has a configuration like that shown in Fig. 2, the problem of wrinkling and smearing associated with hot roll fusers is greatly reduced, if not eliminated.

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