公开(公告)号：CA1222659A

公开(公告)日：1987-06-09

申请号：CA426926

申请日：1983-04-28

Applicant: IBM

Inventor： BOWLDS PATSY A ,  DUNN DAVID P ,  FATHERGILL REX D ,  FINDLAY HUGH T ,  STAFFORD DONALD W

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: MODIFIED RESISTIVE LAYER IN THERMAL TRANSFER MEDIUM 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：CA1180183A

公开(公告)日：1985-01-02

申请号：CA414909

申请日：1982-11-04

Applicant: IBM

Inventor： BOWLDS PATSY A ,  CASSIDY BRUCE M ,  GRAHAM ARTHUR E ,  HULJAK ROBERT J ,  STAFFORD DONALD W ,  TAO DEH C

IPC: B41M5/392 ,  B41J31/00 ,  B41J31/05 ,  B41M5/382 ,  B41M5/26

Abstract: INTERMEDIATE LAYER IN THERMAL TRANSFER MEDIUM In accordance with this invention a transfer medium for thermal printing is disclosed which has a very thin layer of silicon dioxide as a lamination on the resistive layer. A heat-flowable layer of marking material can be used on the side opposite the resistive layer. A typical embodiment has a resistive layer comprising a particulate, conductive filler material and a polymeric binder; a layer of silicon dioxide; a metal layer contacting the silicon dioxide opposite the resistive layer; and a solid, meltable ink on the other side of the metal layer. LE9-81-022

公开(公告)号：CA1222411A

公开(公告)日：1987-06-02

申请号：CA462551

申请日：1984-09-06

Applicant: IBM

Inventor： BARTLETT JOHN C ,  BOHNHOFF ALAN E ,  CROLEY DONALD F ,  DYER STANLEY ,  EDDS KENNETH E ,  HORLANDER FRANK J ,  STAFFORD DONALD W

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

Abstract: DRIVE FOR THERMAL PRINTING LIFT-OFF CORRECTION 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：BR8303139A

公开(公告)日：1984-01-31

申请号：BR8303139

申请日：1983-06-13

Applicant: IBM

Inventor： BOWLDS PATSY ANN ,  DUNN DAVID PIERCE ,  FATHERGILL REX D ,  FINDLAY HUGH T ,  STAFFORD DONALD W

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：CA1089792A

公开(公告)日：1980-11-18

申请号：CA293023

申请日：1977-12-14

Applicant: IBM

Inventor： LITKENHUS JOHN R ,  STAFFORD DONALD W

IPC: B41J19/50 ,  B41J19/20

Abstract: ESCAPEMENT MECHANISM FOR TYPEWRITERS Disclosed is a mechanism for replacing the non-escape-ment 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：FR2380884A1

公开(公告)日：1978-09-15

申请号：FR7800741

申请日：1978-01-05

Applicant: IBM

Inventor： LITKENHUS JOHN R ,  STAFFORD DONALD W

IPC: B41J19/50 ,  B41J19/42

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.