公开(公告)号：WO1980000944A1

公开(公告)日：1980-05-15

申请号：PCT/US1979000938

申请日：1979-11-02

Applicant: NCR CORP

Inventor： NCR CORP ,  SWAN W

IPC: B41J03/20

CPC classification number: B41J19/142

Abstract: An apparatus for generating pulses for both character and individual "dot" strobing, as for example, in matrix printers. The apparatus includes a first stationary synchronization track (32) and a co-operating first movable synchronization track (40), to move with the matrix printer, for generating the start of character pulses and a second stationary synchronization track (54) and a second co-operating second movable synchronization track (56) to move with the matrix printer, for generating individual "dot" pulses of a character to produce vertically aligned characters in a bi-directional printer. The first synchronization tracks (32, 40) are designed to produce pulses having narrow rise and fall slopes for accurate character location and the second synchronization tracks (54, 56) are designed to produce pulses having gradual rise and fall slopes to provide for adjustment of the individual "dot" pulses for bi-directional printing.