Impact dot print head

Details Impact dot print head Impact dot print head

1989-05-24

1991-06-18

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 227

Patent

active

050245430

ABSTRACT:
An impact dot print head for printing without impact noise when returning to the non-printed position includes a base. An arm is mounted for movement between a non-print position and a print position. A print wire is mounted on the arm. A first device selectively drives the arm towards the print position by bias or magnetic force. A second device returns the arm to the non-print position and maintains the arm at that position without causing the arm to impact any member of the print head when returning to the print position. The second device uses balanced magnetic attraction or repulsion and/or bias forces to hold the arm out of contact with other parts of the printer other than at its point of mounting when at the non-print position.

REFERENCES:
patent: 4214836 (1980-07-01), Wang
patent: 4302115 (1981-11-01), Yasunaga et al.
patent: 4396304 (1983-08-01), Davenport et al.
patent: 4568207 (1986-02-01), Hara et al.
patent: 4925625 (1990-05-01), Shimosato et al.

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