Switching mechanism for a paper holding roller of a printer

Details Switching mechanism for a paper holding roller of a printer Switching mechanism for a paper holding roller of a printer

1989-01-27

1990-07-17

Eickholt, Eugene H.

Typewriting machines

Sheet or web

Including friction-feed means

4006391, B41J 1302

Patent

active

049417622

ABSTRACT:
A mechanism for switching a paper holding roller of an automatically feeding printer between a contact position for holding a paper against the platen and a separation position away from the platen utilizing the platen power source. A transmission mechanism includes a trigger which is moved selectively by an electro-magnetic member to engage a gear between the platen power source and a roller lever on which the paper holding roller is mounted to move the paper holding roller between the contact/separation positions. In one embodiment, two partial gears engage a gear portion of the lever to move the lever in both directions. In another embodiment, an epicyclic lever is selectively rotated in one of two directions to engage one of two oppositely rotating epicyclic gears to move the paper holding roller.

REFERENCES:
patent: 2210168 (1940-08-01), Hart
patent: 3923267 (1975-12-01), Eckerd
patent: 4031995 (1977-06-01), Blum et al.
patent: 4338035 (1982-07-01), Kondo et al.
patent: 4498795 (1985-02-01), Tatara
patent: 4581618 (1986-04-01), Watanabe et al.
patent: 4630814 (1986-12-01), Kawakubo et al.
patent: 4722624 (1988-02-01), Musso
"Automatic Paper Bail Closing Device", IBM Technical Disclosure Bulletin, vol. 28, No. 1, pp. 250-251, 6-85.

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