公开(公告)号：AU5654486A

公开(公告)日：1986-11-06

申请号：AU5654486

申请日：1986-04-23

Applicant: IBM

Inventor： ENGLE VENCIL DELANO ,  HAFER CAMERON HENRY ,  HUGHES FRANK MARION ,  STEGER DONALD JUNE ,  STEWART EDWARD GORDON ,  STREET RAMON LEGRAND ,  THOMPSON JOHN ADDISON

IPC: B41J32/02 ,  B41J33/24 ,  B41J33/26 ,  B41M5/26 ,  B41J33/20 ,  B41J32/00

Abstract: The thermal transfer medium (28) is fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the transfer medium (28) just prior to the printhead (21) to maintain a portion of the transfer medium (28) between the printhead (21) and the feed roll (82) relatively stiff. The feed roll (82) is mounted on a cartridge (30) having the transfer medium (28) supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium (28) prior to the feed roll (82) to cause a substantially constant premetering tension to be applied to the transfer medium (28) irrespective of the coefficient of friction between the drag brake (70) and the thermal transfer medium (28). A carrier (14), which supports the printhead (21) and a feed roll driver, is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium (28) and the carrier (14) are obtained to produce various print qualities. The peel angle of the thermal transfer medium (28) from a print medium (12) is maintained at a relatively low angle to increase the contact time between the thermal transfer medium (28) and the recording medium (12).

公开(公告)号：DE2861250D1

公开(公告)日：1981-12-10

申请号：DE2861250

申请日：1978-12-15

Applicant: IBM

Inventor： BERNARDELLI WILLIAM JAMES ,  CAUDILL ALLISON HOLLAND ,  THOMPSON JOHN ADDISON

IPC: G03G21/10 ,  G03G15/02 ,  G03G15/14 ,  G03G15/16 ,  G03G21/00

Abstract: A xerographic copier includes a pre-clean corona (13) and a transfer corona (12). A developing station (14) employs carrier beads coated with tetrafluoroethylene, which material can film on to the drum. In order to reduce such filming, the pre-clean and transfer corona currents are adjusted to the same polarity and to levels, under a condition of operation of the machine in which no copy sheet is fed through the transfer station, which produce charge densities on the photoconductor element within 0.025 microcoulombs of each other.

公开(公告)号：DE2846430A1

公开(公告)日：1979-05-17

申请号：DE2846430

申请日：1978-10-25

Applicant: IBM

Inventor： ELLIS RICHARD EARL ,  SCHWARTZ BRADFORD CLYDE ,  THOMPSON JOHN ADDISON

IPC: G03G15/08 ,  G03G15/09

公开(公告)号：AU582233B2

公开(公告)日：1989-03-16

申请号：AU5654486

申请日：1986-04-23

Applicant: IBM

Inventor： ENGLE VENCIL DELANO ,  HAFER CAMERON HENRY ,  HUGHES FRANK MARION ,  STEGER DONALD JUNE ,  STEWART EDWARD GORDON ,  STREET RAMON LEGRAND ,  THOMPSON JOHN ADDISON

IPC: B41J32/02 ,  B41J33/24 ,  B41J33/26 ,  B41M5/26 ,  B41J33/52 ,  B41J32/00

Abstract: The thermal transfer medium (28) is fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the transfer medium (28) just prior to the printhead (21) to maintain a portion of the transfer medium (28) between the printhead (21) and the feed roll (82) relatively stiff. The feed roll (82) is mounted on a cartridge (30) having the transfer medium (28) supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium (28) prior to the feed roll (82) to cause a substantially constant premetering tension to be applied to the transfer medium (28) irrespective of the coefficient of friction between the drag brake (70) and the thermal transfer medium (28). A carrier (14), which supports the printhead (21) and a feed roll driver, is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium (28) and the carrier (14) are obtained to produce various print qualities. The peel angle of the thermal transfer medium (28) from a print medium (12) is maintained at a relatively low angle to increase the contact time between the thermal transfer medium (28) and the recording medium (12).

公开(公告)号：BR8601759A

公开(公告)日：1986-12-23

申请号：BR8601759

申请日：1986-04-18

Applicant: IBM

Inventor： ENGLE VENCIL DELANO ,  HAVER CAMERON HENRY ,  HUGHES FRANK MARION ,  STEGER DONALD JUNE ,  STEWARD EDWARD GORDON ,  STREET RAMON LEGRAND ,  THOMPSON JOHN ADDISON

IPC: B41J32/02 ,  B41J33/24 ,  B41J33/26 ,  B41M5/26

Abstract: The thermal transfer medium (28) is fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the transfer medium (28) just prior to the printhead (21) to maintain a portion of the transfer medium (28) between the printhead (21) and the feed roll (82) relatively stiff. The feed roll (82) is mounted on a cartridge (30) having the transfer medium (28) supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium (28) prior to the feed roll (82) to cause a substantially constant premetering tension to be applied to the transfer medium (28) irrespective of the coefficient of friction between the drag brake (70) and the thermal transfer medium (28). A carrier (14), which supports the printhead (21) and a feed roll driver, is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium (28) and the carrier (14) are obtained to produce various print qualities. The peel angle of the thermal transfer medium (28) from a print medium (12) is maintained at a relatively low angle to increase the contact time between the thermal transfer medium (28) and the recording medium (12).

公开(公告)号：AU3829378A

公开(公告)日：1980-01-31

申请号：AU3829378

申请日：1978-07-24

Applicant: IBM

Inventor： ELLIS RICHARD EARL ,  SCHWARTZ BRADFORD CLYDE ,  THOMPSON JOHN ADDISON

IPC: G03G15/08 ,  G03G15/09

公开(公告)号：AU1808376A

公开(公告)日：1978-04-06

申请号：AU1808376

申请日：1976-09-23

Applicant: IBM

Inventor： ABBOTT JERRY JOE ,  CAMPBELL CHARLES ANDREW ,  CAUDILL ALLISON HOLLAND ,  THOMPSON JOHN ADDISON

IPC: G03G15/08 ,  G03G15/09

Abstract: An auger fed magnetic brush developer wherein two parallel augers continuously recirculate the developer mix and cause the mix to be enriched with toner prior to its being returned to the magnetic brush roll.

公开(公告)号：DE2642681A1

公开(公告)日：1977-04-07

申请号：DE2642681

申请日：1976-09-22

Applicant: IBM

Inventor： ABBOTT JERRY JOE ,  CAMPBELL CHARLES ANDREW ,  CAUDILL ALLISON HOLLAND ,  THOMPSON JOHN ADDISON

IPC: G03G15/08 ,  G03G15/09

Abstract: An auger fed magnetic brush developer wherein two parallel augers continuously recirculate the developer mix and cause the mix to be enriched with toner prior to its being returned to the magnetic brush roll.