Browse Prior Art Database

Fuser Latch For Copiers

IP.com Disclosure Number: IPCOM000048726D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Steinbrecher, ML: AUTHOR

Abstract

A relatively simple latching mechanism allows accurate positioning of closure forces between those rollers. The latch is openable to allow full access to the roller interface while providing a shock-absorber function In the event that one of the rollers is dropped towards the other. The mechanism is particularly useful for the closure between hot rolls and backup rolls in the fusers of copiers.

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Fuser Latch For Copiers

A relatively simple latching mechanism allows accurate positioning of closure forces between those rollers. The latch is openable to allow full access to the roller interface while providing a shock-absorber function In the event that one of the rollers is dropped towards the other. The mechanism is particularly useful for the closure between hot rolls and backup rolls in the fusers of copiers.

In the example shown, heated hot roll 10 contained within frame 12 is held by the latch mechanism 15 in normally spaced relation from a backup roll 16. Latch mechanism 15 includes a latch bracket 20 which is attached to a closure bracket
21. A groove formed at end 22 of an arm, as shown in side view, receives an elongated ridge 24 on frame 12. Spring 25 biases arm 22 upwardly against a stop element (not shown), although the vertical position of arm 22 is adjustable through screw element 26.

By pulling upwardly on ring handle 28 attached to frame 12, and to the left on latch handle 29, the elongated ridge 24 is released from latch mechanism 15. This allows the pivoting of frame 12 around pivot point 30 to the position shown in dotted lines, thereby permitting full access to both rollers 10 and 16. If frame 12 should accidentally drop towards roller 16, ridge 24 initially engages the spring-biased groove at 22, thus providing a shock-absorber operation to prevent traumatic engagement between the rollers.

In its normal operation and particularly in an idle state of the copier, the latch mechanism holds rollers 10 and 16 in a slightly displaced relation, as shown. At the start of a copy run, counterclockwise torque, as through actuator 31, is applied to rod 36. Rod 36 is attached to closure bracket 21 and thus pivots closure bracket 21 around torque b...