# US 5,138,373 A · Copier or printer component position floating magnetic actuator

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- Number: US 5,138,373 A
- Document ID: US5138373A
- Status: Granted
- Kind: A
- Application number: 07/807,357
- Filed: 1991-12-16
- Granted: 1992-08-11
- Earliest claimed: 1991-12-16
- Assignees: Xerox Corporation
- Inventors: August Hoyer
- Web page: https://patentgrep.com/patent/US5138373A

## CPC

- G03G 15/65: {Apparatus which relate to the handling of copy material (handling sheets or webs in general B65H; for photographic purposes in general G03B)}
- G03G 15/00: Apparatus for electrographic processes using a charge pattern (G03G16/00, G03G17/00 take precedence)
- H01H 36/0046: {Limit switches, also fail-safe operation or anti-tamper considerations}
- G03G 2215/00371: General use over the entire feeding path
- G03G 2215/00383: Cassette
- G03G 2215/00426: Post-treatment device adding qualities to the copy medium product (G03G2215/00421 takes precedence)
- G03G 2215/0054: Detachable element of feed path
- G03G 2215/00603: Control of other part of the apparatus according to the state of copy medium feeding
- G03G 2215/00611: Detector details, e.g. optical detector
- G03G 2215/00624: Magnetic detector or switch, e.g. reed switch
- G03G 2215/00784: of connection or pressing of structural part
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

In a copier or printer a magnetic switch system is often used to indicate or signal the separation, mating, alignment or docking of components movable relative to one another, by the actuation or non-actuation of a magnetic switch on a first such component, such as a fixed frame member, by a magnet or a second such component, such as a manually movable tray, which magnet and magnetic switch are positioned such that as the components are moved together and docked the magnet actuates the magnetic switch. Here, the magnet is resiliently cantilever mounted to the second component to extend out towards the first component in the movement direction by a substantial preset distance (when undocked) sufficient to accommodate and compenaste for a substantial variation in the first and second components docking positions by actuation of the magnetic switch by the magnet anywhere within the range of the preset distance by flexing of the spring with further movement of the components towards one another after the magnet initially actuates the magnetic switch. The spring has a sufficiently low resiliency to not interfere with the normal relative movement of the components. The spring is also sufficiently elongated in the direction transverse the movement direction to maintain actuation of the magnetic switch by the magnet within the range of the preset distance irrespective of the flexing of the spring.

## Claims

### Claim 1

In a copier or printer apparatus, in which a magnetic switch system indicates or signals the separation, mating, alignment or docking of components movable relative to one another, by the actuation or non-actuation of a magnetic switch on a first such component by a magnet on a second such component, which magnet and magnetic switch are position such that as said first and second components are moved together or docked in their normal relative movement direction said magnet actuates said magnetic switch; at the improvement in said magnetic switch system wherein:
said magnet is resiliently cantilever mounted to said second component extended out on a elongate spring,
said spring extending said magnet out from said second component towards said first component in the direction of tier movement towards one another by a substantial preset distance in their undocked position sufficient to accommodate and compensate for a substantial variation in said first and second components docking positions by actuation of said magnetic switch by said magnet anywhere within the range of said preset distance by flexing of said spring with further movement of said first and second components towards one another after said magnet initially actuates said magnetic switch,
said spring having a sufficiently low resiliency to not interfere with said normal relative movement of said fist and second components,
and said spring being sufficiently elongated int eh direction transverse said movement direction to maintain actuation of said magnetic switch by said magnet within said range of said present distance irrespective of said flexing of said spring.

### Claim 2 (depends on 1)

The copier or printer apparatus of claim 1, wherein said second component is a manually movable tray and said first component is a fixed frame member of said copier or printer.