Impact dot print head and printer including same

Details Impact dot print head and printer including same Impact dot print head and printer including same

1991-09-16

1994-06-21

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 224

Patent

active

053223799

ABSTRACT:
A printer including an impact dot print head for driving a plurality of print wires mounted on the cantilevered end of print levers is provided. The print head includes a stopper positioned to be impacted by a print lever returning from a print position to an at rest position before a plunger on the lever impacts the magnetic core. A spring mounted on the lever biases it towards the print position. Magnetic flux of a permanent magnet attracts the plunger to the non-print position. An electromagnetic coil is energized to cancel the magnetic attraction of the plunger to the core to drive the wire towards the print position.

REFERENCES:
patent: 3814412 (1974-06-01), Britton et al.
patent: 4437775 (1984-03-01), Ochiai et al.
patent: 4521122 (1985-06-01), Schafer et al.
patent: 4594010 (1986-06-01), Jachno
patent: 4600321 (1986-07-01), Kwan
patent: 4647237 (1987-03-01), Moriya et al.
patent: 4886381 (1989-12-01), Kersey
patent: 5013169 (1991-05-01), Ikehata et al.

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