Printer utilizing improved impact dot print head

Details Printer utilizing improved impact dot print head Printer utilizing improved impact dot print head

1989-10-17

1991-08-13

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 2285

Patent

active

050392352

ABSTRACT:
A printer utilizes an impact dot print head achieving higher drive acceleration and resultant velocity for driving a print wire without notable increase in the moment of inertia through the provision of magnetic influencing means on adjacent or opposite sides of the print wire lever fulcrum or rotation center. The length of the print wire actuating lever between the rotation center and the print wire connection on one side of the lever is longer than the length of the lever between the rotation center and the point of magnetic influence on the other side of the lever. Thus, angular moment for driving a print wire actuating lever can be increased without notable increase of the moment of inertia by employing a magnetic influencing means on opposite sides of the rotation center of the print wire actuating lever. Therefore, an increase in the speed of printing can be achieved in the employment of the disclosed magnetic influencing means without any accompanying problems due to increased inertial mass of the print wire operating mechanism.

REFERENCES:
patent: 4218148 (1980-08-01), Matschke
patent: 4382701 (1983-05-01), Davenport
patent: 4472072 (1984-10-01), Harada et al.
patent: 4572681 (1986-02-01), Miyazawa et al.
patent: 4687354 (1987-08-01), Tanaka
patent: 4767227 (1988-08-01), Mitsuishi et al.
patent: 4802776 (1989-02-01), Miyazawa et al.
patent: 4895464 (1990-01-01), Rubinshtein

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