Print hammer actuation device

Details Print hammer actuation device Print hammer actuation device

1975-07-07

1977-03-01

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

B41J 936

Patent

active

040096556

ABSTRACT:
A typewriting device includes a type-carrying drum driven from a drive source and supporting types in rows parallel to the axis of the drum. A plurality of electromagnets are associated with the types in rows. A plurality of operation levers are disposed opposite to the magnets and are normally urged away from the magnets. A plurality of actuators are rockably mounted on respective of the operation levers. A plurality of hammer levers are mounted on a common shaft in association with respective of the operation levers for rocking movement about the shaft between the type-carrying drum and the actuators and are normally urged away from the type-carrying drum. The hammer levers are caused to contact the drum with a striking force upon operation of the actuators. A plurality of drive members associated with the hammer levers, are mounted for rotation in synchronization with the type-carrying drum, and each include a cam portion opposite to a respective actuators and a projection separated from the cam portion in parallel to and radially away from the axis of rotation of the drive member.

REFERENCES:
patent: 3648602 (1972-03-01), Avgerinos et al.
patent: 3795185 (1974-03-01), Shimodaira et al.
patent: 3804009 (1974-04-01), Blume
patent: 3823667 (1974-07-01), Babler
patent: 3832942 (1974-09-01), Murayoshi
patent: 3935813 (1976-02-01), Matsubara

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