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Hot Roll Mounting Structure

IP.com Disclosure Number: IPCOM000051043D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Chang, JP: AUTHOR [+3]

Abstract

The hot roll for a copier/duplicator or the like is mounted by an end cap and reflector in a manner which minimizes heat migration to a bearing retained by the cap.

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Hot Roll Mounting Structure

The hot roll for a copier/duplicator or the like is mounted by an end cap and reflector in a manner which minimizes heat migration to a bearing retained by the cap.

Hot roll 10 (Fig. 1) is formed of a cylindrical, heat-conducting core 11 on which a compliant layer 12 is placed for hot fusing toner carrying copy sheets or the like in conjunction with a back-up roll (not shown). Coating 12 is silicon rubber or the like, although no coating may be used in some hot roll applications, End cap 15 is a somewhat cup-shaped, stamped steel part with secondary machining operations on its interface 16 with core 11. Disc-shaped reflector 18 is attached to cap 15 by tab attachments or the like in a position spaced from bearing 20, heating lamp 21 and the interior of core 11. Cap 15 is also formed with indented bearing stops, such as 22 to position bearing 20 with minimum contact to cap 15.

An assembly 25 is firmly attached to the machine frame 26 with an inwardly extending collar portion 28 to receive bearing 20 and hold it in place. Assembly 25 further includes a socket element 30 for electrical connections through connector 31 into heating lamp 21 with the contact being retained within the lamp holder area by spring 32. The pressing of cap 15 onto core 11 avoids the need for the counter-boring of core 11 but ensures accurate alignment, concentricity and positioning of the insulator to the hot roll interface. The sagging of the hot roll core 11 against the insulator mount is eliminated with this design.

Thus, the gap between the hot roll and back-up roll is maximized. A narrow gap can cause excessive back-up roll temperatu...