Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1992-05-20
1994-01-25
Wiecking, David A.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 2275
Patent
active
052810372
ABSTRACT:
An improved wire dot print head for increased integrated density is provided. The wire dot print head includes a frame. A plurality of drive coils are mounted within the frame. A lever for driving print wires has a print wire mounted at one end and its other end formed as a hook to act as a rotation support member. A yoke has salients formed thereon equal in number to that of the levers disposed on its end surface. The rotation support member of each lever is retained with a recess formed within a respective yoke and an end surface of the frame and is affixed in place by a retainer spring. When an excitement current flows through the coil, the lever is caused to move so that the print wires rotate about the rotation support member causing the print wires to strike a platen.
REFERENCES:
patent: 4230033 (1980-10-01), Hebert
patent: 4367962 (1983-01-01), Gaboardi
patent: 4569605 (1986-02-01), Meier et al.
patent: 4600321 (1986-07-01), Kwan
patent: 4653943 (1987-03-01), Sakaida et al.
patent: 4687355 (1987-08-01), Ikehata et al.
patent: 4767227 (1988-08-01), Mitsuishi et al.
Asada Takashi
Koshiishi Osamu
Nakazawa Yasuhiko
Shimomura Masaki
Kaplan Blum
Seiko Epson Corporation
Wiecking David A.
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