Printing – Selective or progressive – Bed and platen machines
Patent
1981-03-23
1982-12-28
Sewell, Paul T.
Printing
Selective or progressive
Bed and platen machines
400121, B41J 312
Patent
active
043655505
ABSTRACT:
A cross point type dot matrix impact printer comprising a platen and a plurality of hammers arranged in the axial direction of the platen. The platen has a helix composed of a plurality of protrusions helically provided on the periphery thereof. The hammer has a hammer head which strikes each protrusion during the rotation of the platen for performing the dot matrix impact printing.
REFERENCES:
patent: 3884148 (1975-05-01), Bergeron
patent: 4263847 (1981-04-01), Kurihara et al.
Kurihara Toshio
Mizutani Nagao
Citizen Watch Co. Ltd.
Sewell Paul T.
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