公开(公告)号：DE3168485D1

公开(公告)日：1985-03-07

申请号：DE3168485

申请日：1981-08-05

Applicant: IBM

Inventor： CONLY DOUGLAS JARVIS ,  LARSON DAVID DUANE ,  RIDDLE STANLEY THOMAS

IPC: G03G21/10 ,  G03G15/00 ,  G03G21/00

Abstract: In order to test components of a xerographic copier, the copier is run through test cycles in each of which copying stations which act directly on the imaging element are set to abnormal conditions. In one such cycle, during a first period, the exposure lamp is initially on and then turned off. In a further period in the same cycle, erase lamps are selectively turned on and off to produce a test pattern image. Other components which are either turned off at selected periods in a copying cycle or driven with lower than normal voltages include the charging, transfer and cleaning corotrons. In addition the developer bias may be set low. The resulting copy sheets provides an indication of fault conditions within the copier.

公开(公告)号：DE3167353D1

公开(公告)日：1985-01-10

申请号：DE3167353

申请日：1981-01-08

Applicant: IBM

Inventor： LARSON DAVID DUANE ,  RIDDLE STANLEY THOMAS

IPC: G06F11/34 ,  G03G15/00

Abstract: Malfunctions of a copying machine are lagged in an exception counter (19). At the end of a predetermined number of command pulses, defined by the content of a limit register (20), a comparator (12) provides an output signal to enable AND gates (17) and (18). During the occurrence of the command pulse sequence, error signals are counted by error counter (14), and if, at the end of the sequence, the count is greater than or equal to a count in a criteria register (15) then the exception counter is incremented. Otherwise, the exception counter is reset. Thus, after a number of successive command pulse sequences, the exception counter records persistent malfunctions only. The system may be incorporated in a microprocessor system using defined registers to hold the counts and effect comparisons.

公开(公告)号：DE3162574D1

公开(公告)日：1984-04-19

申请号：DE3162574

申请日：1981-03-19

Applicant: IBM

Inventor： CONLY DOUGLAS JARVIS ,  BAKER BONNIE BELLE ,  LARSON DAVID DUANE ,  RIDDLE STANLEY THOMAS

IPC: B41B19/00 ,  B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  B41J29/40 ,  G03G15/04 ,  G03G15/045 ,  G03G15/047 ,  G03G15/22 ,  G06F3/14 ,  G06K15/12 ,  G09F9/30 ,  H04N1/23 ,  G03G15/052

公开(公告)号：DE2509452A1

公开(公告)日：1975-09-18

申请号：DE2509452

申请日：1975-03-05

Applicant: IBM

Inventor： JOHNSON LARRY ALBIN ,  ROBINSON NEIL LLOYD ,  STRANG RICHARD HUBERT ,  VAIR GARY GAIL ,  RIDDLE STANLEY THOMAS ,  BROWER RALPH DOYLE

IPC: B24B49/00 ,  G11B5/187 ,  G11B5/39 ,  G11B33/10 ,  G11B5/22 ,  G11B5/42