Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1977-10-25
1978-12-12
Pieprz, William
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9304, 101 9329, 101 9348, 361402, B41J 312
Patent
active
041293908
ABSTRACT:
A printer head for use in an impact printer of the dotmatrix type utilizes a stack of pivoted thin blades, each having a printing tip at one end thereof. A pancake coil is attached to each blade for initiating selective independent movement thereof within a common, externally-produced magnetic field to efficiently convert electrical print signals to kinetic energy in each printing tip of a vertical array thereof thereby facilitating printing of symbols, characters and other indicia on underlying media with high resolution. The single magnetic-field-producing means interacts with all pancake coils of the stack of printer blades to facilitate close spacing of the printing tips for superior character printing. Resilient members are integrally formed in each blade to support the moving structure with negligible loss, thereby increasing the printing speed of the stacked blade head.
REFERENCES:
patent: 2502785 (1950-04-01), Gottschalk
patent: 2659652 (1953-11-01), Thompson
patent: 3217640 (1965-11-01), Bradshaw
patent: 3270349 (1966-08-01), Murphy
patent: 3325821 (1967-06-01), Reese et al.
patent: 3947934 (1976-04-01), Olson
patent: 3968744 (1976-07-01), Kash et al.
patent: 3971311 (1976-07-01), Deproux
patent: 4022311 (1977-05-01), Krull
Bigelow John E.
Peroutky Donald C.
Cohen Joseph T.
General Electric Company
Krauss Geoffrey H.
Pieprz William
Snyder Marvin
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