公开(公告)号：DE2454237A1

公开(公告)日：1975-05-28

申请号：DE2454237

申请日：1974-11-15

Applicant: IBM

Inventor： CARMICHAEL JOHN MICHAEL ,  HILL JAMES DAVID ,  WEST DONALD LEE

IPC: B41J2/13 ,  B41J19/18 ,  B41J19/20 ,  B41J21/18 ,  B41J29/42 ,  G06F3/12 ,  G06K15/08 ,  G06K15/10 ,  H04N1/23 ,  B41J3/04

公开(公告)号：DE2434759A1

公开(公告)日：1975-02-27

申请号：DE2434759

申请日：1974-07-19

Applicant: IBM

Inventor： CARMICHAEL JOHN MICHAEL ,  WEST DONALD LEE ,  WILLIAMS ROBERT ALBIN

IPC: G01P3/66 ,  B41J2/12 ,  B41J2/125 ,  G01R5/28 ,  G01R29/24 ,  G06K15/10 ,  H04N1/23 ,  B41J3/04

Abstract: Circuits are described involving a method of detecting charges on drops in an ink jet stream without contacting the stream. This permits a determination of proper synchronization and charging of the drops, the velocity of the ink stream, the extent of deflection of the drops, and whether or not the stream is in operation, or has stopped.