Driving force control system for impact printer

Details Driving force control system for impact printer Driving force control system for impact printer

B - Operations, Transporting

41

J

101/96.09

B41J 3/10 (1980.01) B41J 7/84 (1980.01)

Patent

CA 1173292

45-SL-01355 DRIVING FORCE CONTROL SYSTEM FOR IMPACT PRINTER ABSTRACT OF THE DISCLOSURE In a drive circuit for an electromagnetic printing element of a matrix impact printer, a drive pulse drives the printing element from the backstop toward a record medium to print indicia, and a damping pulse, applied to the printing element after its return to the backstop, urges it toward the backstop to limit rebound therefrom. Logical control circuitry is responsive to overlap of a drive pulse with a preceding damping pulse for terminating the damping pulse and for decreasing the width of the drive pulse in proportion to the amount of overlap. Blanking means are provided to prevent application of a damping pulse to the printing element until after the completion of a preceding drive pulse and after impact of the printing element with the record medium and with the backstop.

391557

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