Print actuator

Details Print actuator Print actuator

1996-02-26

1997-10-14

Hilten, John S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400167, B41J 230

Patent

active

056764740

ABSTRACT:
Disclosed is a print actuator that maintains an adequate impact force and a shift stroke length and considerably increases a printing speed. According to the print actuator of the present invention, when a leaf spring 78 has been released from a rear magnetic unit 68 and passes through its neutral point and abuts upon magnetic poles 92 and 94 of a front magnetic unit 86, kinetic energy is stored in the leaf spring 78. By contacting the magnetic poles 92 and 94 of the front magnetic unit 86, the leaf spring 78 obtains a reaction force and generates kinetic energy for the return direction. The initial kinetic energy for an armature 80 is acquired from the composite force that consists of the reaction force and a recovery force that is stored in the leaf spring 78. The movement of the armature 80 is greatly accelerated by the attraction force of a permanent magnet 70 when no current is supplied to a coil 72, and is brought into contact with the magnetic poles 92, 94 and halted. That is, compared with the prior art, the initial speed of the armature 80 is considerably increased by the reaction force, and the time required for the return is substantially reduced.

REFERENCES:
patent: 4134691 (1979-01-01), Matschke
patent: 4613243 (1986-09-01), Rossi et al.
patent: 4995744 (1991-02-01), Goldowsky et al.
patent: 5232296 (1993-08-01), Andou et al.

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