Dot matrix printhead employing moving coils

Details Dot matrix printhead employing moving coils Dot matrix printhead employing moving coils

B - Operations, Transporting

41

J

101/96.05

B41J 2/29 (2006.01) B41J 2/25 (2006.01)

Patent

CA 1229518

ABSTRACT OF THE DISCLOSURE Printing apparatus of the dot matrix type is provided herein comprising a plurality of print wire actuators employing moving coils. The wire printing tip of each actuator is activated by the coil magnetic field interacting with an efficiently applied magnetic field substantially perpendicular to the direction of current flow in the coil. The actuator comprises a thin planar lamination having low inertia and high heat dissipation for balanced pivotal motion to provide high speed letter quality printing and high resolution graphics. One advantage is that the mass of the print wire actuator including the print wire is reduced. Another advantage is that the moment of inertia of the actuator is minimized and the torque to inertia ratio is maximized. A further advantage is that extensive bending of the print wires is eliminated while having a large number of print wires closely packed for producing high quality print. Still another advantage is that high quality print is obtained from a dot matrix print head in a single pass relative to the paper web.

447411

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