Printing – Selective or progressive – Bed and platen machines
Patent
1998-05-06
1999-05-25
Burr, Edgar
Printing
Selective or progressive
Bed and platen machines
101 9329, B41J 900
Patent
active
059061570
ABSTRACT:
An impact hammer assembly for a high speed printer includes first and second permanent magnets having opposite poles disposed adjacent to each other and having a gap therebetween. The magnets create flux lines extending across the gap. A print hammer includes a hammer beam and a hammer head. The print hammer is movable between a rest position and a print position. The hammer beam is disposed in the gap between the first and second magnets. A coil is disposed on the hammer beam and perpendicular to the magnetic flux lines. Circuitry generates a current in the coil and controls the direction of current flow in the coil, such that when current flows in the coil in a first direction, the print hammer moves towards the print position and when current flows in the coil in a second direction, opposite to the first direction, the print hammer moves towards the rest position.
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BancTec Inc.
Burr Edgar
Chau Minh H.
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