Impact type dot printer

Details Impact type dot printer Impact type dot printer

1980-09-03

1984-08-14

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9304, B41J 302

Patent

active

044653867

ABSTRACT:
A printing head adapted to be moved for scanning in a direction perpendicular to the direction of feed of a paper is provided with a sole printing element (printing hammer) adapted to be driven in an impacting manner by an electromagnetic driving device. A platen disposed to oppose to the printing head is provided with a plurality of projections formed on the outer peripheral surface thereof and extending substantially in parallel with the axis thereof. Each of the projections being adapted to oppose to the printing element in a crossing relation to the latter when it is brought to the position ahead of the printing element as a result of rotation of the platen. As the printing element collides with the projection while the platen is rotated, a dot is formed on the recording paper at the position of crossing between the printing element and the projection, so that various patterns such as letters, numerals, symbols, pictures and so forth are printed at a high speed by a sole printing element.

REFERENCES:
patent: 3324240 (1967-06-01), Kleinschmidt et al.
patent: 3804008 (1974-04-01), Hoyer
patent: 3834304 (1974-09-01), Potter
patent: 3926293 (1975-12-01), Ljungberg
patent: 4077336 (1978-03-01), Talvard et al.
patent: 4202638 (1980-05-01), Stenudd

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