Drive circuit for printing head

Details Drive circuit for printing head Drive circuit for printing head

B - Operations, Transporting

41

J

354/236.11

B41J 2/30 (2006.01)

Patent

CA 1128211

45 SL 01289 ABSTRACT OF THE DISCLOSURE A drive circuit is responsive to input pulses to supply drive energy pulses to the printing head of a matrix printer so as to produce constant impact forces and constant print intensity over a wide range of print rates by decreasing the energy of the drive pulses as a function of the time interval between successive input pulses as said interval diminished below a predetermined value. In one embodiment the amplitude of the drive pulses is reduced as the frequency of the input pulses exceeds the predetermined value. In a second embodiment the duration of the drive pulses is reduced as the frequency of the input pulses exceeds the predetermined value.

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