All-points addressable dot printer

Details All-points addressable dot printer All-points addressable dot printer

1979-07-16

1981-07-14

Sewell, Paul T.

Printing

Selective or progressive

Bed and platen machines

101 9309, 400121, 346101, B41J 308, B41J 312

Patent

active

042780195

ABSTRACT:
An all-points addressable dot printer has rows of sloped parallel anvils on a rotating drum. Alternate rows slope in opposite directions for bi-directional printing with a single row of hammer blades. The blades which are spaced apart, are shifted bi-directionally in synchronism with the scanning motion of the anvils to print dots at all dot line points. A second embodiment has a reciprocating comb bar located between the blades and a print medium. Spring fingers on the comb bar have dot forming protrusions. The spring fingers are uniformly spaced with center spacing equal to the center distances between the blades. Comb bar motion is linear with time along the line segments. Blade motion is simple harmonic.

REFERENCES:
patent: 2205450 (1940-06-01), Wise
patent: 2505779 (1950-05-01), Long
patent: 2678255 (1954-05-01), Beam
patent: 3138429 (1964-06-01), Cooley
patent: 3409904 (1968-11-01), Maiershofer
patent: 3782278 (1974-01-01), Barnett et al.
patent: 3810195 (1974-05-01), Kilroy
patent: 3812495 (1974-05-01), Venker
patent: 3830975 (1974-08-01), Potter
patent: 3843955 (1974-10-01), Pear
patent: 3941051 (1976-03-01), Barrus et al.

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