Dot matrix printer

Details Dot matrix printer Dot matrix printer

1977-02-03

1978-11-14

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

041253361

ABSTRACT:
A dot matrix printer including a dot matrix print head assembly including a plurality of thin, elongated print wires having printing end surfaces, and a bearing member for supporting the print wires adjacent their printing end surfaces. The bearing member has a plurality of bearing apertures, with the printing wire end surfaces extendable therethrough to print on a document. The apertures have their centers aligned along parallel axes defining leading and trailing sets of print wires, the center of each of the apertures aligned with one axis being located parallel to a point between two adjacent ones of the apertures aligned with the other axis. The control means causes selected ones of the leading set of print wires to print at a particular column position, and thereafter causes selected ones of the trailing set of print wires to print at the same column position.

REFERENCES:
patent: 3831729 (1974-08-01), Howard
patent: 3850278 (1974-11-01), Mihm et al.
patent: 3940726 (1976-02-01), Gershnow
patent: 3994382 (1976-11-01), McIntosh
patent: 4046244 (1977-09-01), Velazquez

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