Printing mechanism

Details Printing mechanism Printing mechanism

1986-11-17

1989-04-18

Pearson, Charles A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 4001572, B41J 304

Patent

active

048221880

ABSTRACT:
There is disclosed an improvement upon a cancellation type printing mechanism or a stored energy type printing mechanism having magnetic members, so-called armatures, attracted by a permanent magnet while resiliently deflecting resilient members connected to one end thereof. The magnetic members are associated with corresponding electro-magnets which are adapted to be energized selectively to release the associated magnetic members by cancelling the magnetic attracting force of the permanent magnet, so that the magnetic member is actuated by the energy stored in the corresponding resilient members thereby to drive the printing elements. One end of the magnetic member contacts the magnetic pole surface of the permanent magnet or a yoke mounted on the permanent magnet so as to form a fulcrum for the rotation of the magnetic member. A recess is formed on one side of the magnetic member facing a core of the electro-magnet, so that the magnetic member does not engage the corner of the core of the electro-magnet. According to this construction, the magnetic member is prevented from striking against the corner of the core.

REFERENCES:
patent: 4049107 (1977-09-01), Murat
patent: 4348120 (1982-09-01), Isobe et al.
patent: 4503768 (1985-03-01), Whitaker
patent: 4511269 (1985-04-01), Takahashi et al.
patent: 4537520 (1985-08-01), Ochiai et al.
patent: 4569605 (1986-02-01), Meier et al.

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