Typewriting machines – Including type-set-assemblage mounted on carrier and... – Imprint by movement of record-medium against type-face
Patent
1986-08-15
1989-02-21
Wiecking, David A.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Imprint by movement of record-medium against type-face
400124, 400166, 101 9303, 101 9304, 101 9329, 361154, B41J 914, B41J 310
Patent
active
048060313
ABSTRACT:
Commencing with the first print hammer(s) "out", or actuated, on each print line the hammer drive current is boosted 10% for a period, ranging from 25%=650 microseconds for single part forms to 50% for multi-part forms, of the total print hammer flight time. Earlier striking hammers on each print line strike harder, alleviating displaced first-printed characters on single part forms and light characters on multipart forms due to hammer energy loss in forms compression.
REFERENCES:
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patent: 4259903 (1981-04-01), Orendt et al.
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patent: 4347786 (1982-09-01), Tweat, Jr. et al.
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patent: 4547087 (1985-10-01), Heider et al.
patent: 4678355 (1987-07-01), Gaba et al.
Zerox Disc journal, "Variable Hammer Delay", Deety, vol. 4, No. 2, Mar./Apr. 1979, pp. 157 and 158.
Amdahl Paul O.
Ham John K.
Mazilu Doina
Dataproducts Corporation
McDaniel James R.
Wiecking David A.
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