公开(公告)号：DE2806291A1

公开(公告)日：1978-08-24

申请号：DE2806291

申请日：1978-02-15

Applicant: IBM

Inventor： LITKENHUS JOHN ROBERT ,  STAFFORD DONALD WAYNE

IPC: B41J19/50 ,  B41J25/30

Abstract: Disclosed is a mechanism for replacing the non-escapement magnet normally utilized to inhibit escapement during certain machine functions on a typewriter. A detent arm is connected to the normal pawl knock-off arm so that upon the print shaft rotating and effecting, by a cam thereon, movement of associated linkage and motion of the knock-off arm to disengage the pawl from the ratchet wheel, the detent arm associated with the knock-off arm detents the ratchet wheel and inhibits escapement thereof until the linkage and knock-off arm returns to its normal position by rotation of the print shaft. Thus, if the escapement magnet coil is not energized, the pawl associated with the magnet will return to its normal position and the ratchet wheel will, because of the detent of the member associated with the knock-off arm, be inhibited from motion.

公开(公告)号：DE3463473D1

公开(公告)日：1987-06-11

申请号：DE3463473

申请日：1984-08-10

Applicant: IBM

Inventor： BARTLETT JOHN CROCKETT ,  BOHNHOFF ALAN EARL ,  CROLEY DONALD FRED ,  DYER STANLEY ,  EDDS KENNETH EUGENE ,  HORLANDER FRANK JAMES ,  STAFFORD DONALD WAYNE

IPC: B41J2/325 ,  B41J29/36 ,  B41J29/373 ,  B41M5/26 ,  B41J3/20

Abstract: Ribbon (22) in thermal printing has an outer layer which adheres to printed characters at intermediate temperatures, lower than printing temperatures. The printhead (7) has a column of electrodes (9) which sweep across the character area. Lift-off is accomplished by the pattern control (40) controlling the current source (38) to provide rapid, square wave pulses displaced in phase 180 degrees at adjoining electrodes (9). The high level of the pulses is about that of the level at printing, and the pulses are sufficiently rapid so that their net effect is to raise the outer layer ribbon (22) to the intermediate temperature. At areas corresponding to underlines of characters, duration of the up period is longer. Good, long term reliability is achieved by the significant erase level being very close to the print level.

公开(公告)号：AU1487683A

公开(公告)日：1983-12-22

申请号：AU1487683

申请日：1983-05-23

Applicant: IBM

Inventor： BOWLDS PATSY ANN ,  DUNN DAVID PIERCE ,  DOYLE REX ,  FINDLAY HUGH THOMAS ,  STAFFORD DONALD WAYNE

IPC: B41M5/382 ,  B32B9/04 ,  B32B27/20 ,  B41J27/12 ,  B41J31/00 ,  B41J31/02 ,  B41J31/05 ,  B41J31/06 ,  B41J31/12 ,  B41M5/10 ,  B41M5/20 ,  B41M5/26 ,  B41M5/40

Abstract: A thermal ribbon having a minute coating of graphite powder on the outer side of the resistive layer. The improved electrical interface with print electrodes reduces ribbon and printhead damage. The graphite also reduces friction and loosens material which builds-up at the printhead.

公开(公告)号：AU561270B2

公开(公告)日：1987-05-07

申请号：AU1487683

申请日：1983-05-23

Applicant: IBM

Inventor： BOWLDS PATSY ANN ,  DUNN DAVID PIERCE ,  DOYLE REX ,  FINDLAY HUGH THOMAS ,  STAFFORD DONALD WAYNE

IPC: B41M5/382 ,  B32B9/04 ,  B32B27/20 ,  B41J27/12 ,  B41J31/00 ,  B41J31/02 ,  B41J31/05 ,  B41J31/06 ,  B41J31/12 ,  B41M5/10 ,  B41M5/20 ,  B41M5/26 ,  B41M5/40

Abstract: A thermal ribbon having a minute coating of graphite powder on the outer side of the resistive layer. The improved electrical interface with print electrodes reduces ribbon and printhead damage. The graphite also reduces friction and loosens material which builds-up at the printhead.

公开(公告)号：MX145918A

公开(公告)日：1982-04-21

申请号：MX17227978

申请日：1978-02-01

Applicant: IBM

Inventor： LITKENHUS JOHN ROBERT ,  STAFFORD DONALD WAYNE

IPC: B41J19/50 ,  B41J3/00

Abstract: Disclosed is a mechanism for replacing the non-escapement magnet normally utilized to inhibit escapement during certain machine functions on a typewriter. A detent arm is connected to the normal pawl knock-off arm so that upon the print shaft rotating and effecting, by a cam thereon, movement of associated linkage and motion of the knock-off arm to disengage the pawl from the ratchet wheel, the detent arm associated with the knock-off arm detents the ratchet wheel and inhibits escapement thereof until the linkage and knock-off arm returns to its normal position by rotation of the print shaft. Thus, if the escapement magnet coil is not energized, the pawl associated with the magnet will return to its normal position and the ratchet wheel will, because of the detent of the member associated with the knock-off arm, be inhibited from motion.

公开(公告)号：DE3361337D1

公开(公告)日：1986-01-09

申请号：DE3361337

申请日：1983-05-02

Applicant: IBM

Inventor： BOWLDS PATSY ANN ,  DUNN DAVID PIERCE ,  FATHERGILL REX DOYLE ,  FINDLAY HUGH THOMAS ,  STAFFORD DONALD WAYNE

IPC: B41M5/382 ,  B32B9/04 ,  B32B27/20 ,  B41J27/12 ,  B41J31/00 ,  B41J31/02 ,  B41J31/05 ,  B41J31/06 ,  B41J31/12 ,  B41M5/10 ,  B41M5/20 ,  B41M5/26 ,  B41M5/40

Abstract: A thermal ribbon having a minute coating of graphite powder on the outer side of the resistive layer. The improved electrical interface with print electrodes reduces ribbon and printhead damage. The graphite also reduces friction and loosens material which builds-up at the printhead.

公开(公告)号：AU3219078A

公开(公告)日：1979-07-12

申请号：AU3219078

申请日：1978-01-05

Applicant: IBM

Inventor： LITKENHUS JOHN ROBERT ,  STAFFORD DONALD WAYNE

IPC: B41J19/50 ,  B41J19/42 ,  B41J19/52

Abstract: Disclosed is a mechanism for replacing the non-escapement magnet normally utilized to inhibit escapement during certain machine functions on a typewriter. A detent arm is connected to the normal pawl knock-off arm so that upon the print shaft rotating and effecting, by a cam thereon, movement of associated linkage and motion of the knock-off arm to disengage the pawl from the ratchet wheel, the detent arm associated with the knock-off arm detents the ratchet wheel and inhibits escapement thereof until the linkage and knock-off arm returns to its normal position by rotation of the print shaft. Thus, if the escapement magnet coil is not energized, the pawl associated with the magnet will return to its normal position and the ratchet wheel will, because of the detent of the member associated with the knock-off arm, be inhibited from motion.