Printing – Selective or progressive – Bed and platen machines
Patent
1983-11-23
1985-01-15
Crowder, Clifford D.
Printing
Selective or progressive
Bed and platen machines
4001573, 400166, 310 14, B41J 938, B41J 942
Patent
active
044932537
ABSTRACT:
A variable impact printing mechanism includes a supporting magnetic structure having a plurality of circumferential coils mounted thereon and having a central bore in which a magnetic hammer element is positioned for linear movement to cooperate with a type member positioned adjacent to one end of the bore in order to effect printing on a record member positioned between the hammer and the type member. A controller is provided to energize drivers for the various coils in predetermined sequences to vary the velocity achieved by the hammer element at the end of its printing movement in accordance with varying printing requirements.
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Abraham, et al., "Multiple Energy Print Hammer", IBM Technical Disclosure Bulletin, p. 202, vol. 15, No. 1, June 1972.
United States patent application Ser. No. 491,117, filed May 3, 1983, inventor Ali T. Mazumder, assigned to NCR Canada Ltd.-NCR Canada Ltee, the assignee of the present patent application.
Crowder Clifford D.
NCR Canada Ltd.
Sessler Jr. Albert L.
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