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：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：DE2962346D1

公开(公告)日：1982-04-29

申请号：DE2962346

申请日：1979-08-21

Applicant: IBM

Inventor： HAFER CAMERON HENRY ,  WILBUR CLAYTON VANCE

IPC: B41J2/325 ,  B41J31/00 ,  G06K15/10 ,  B41J3/20

Abstract: An electrothermal printer uses heat-developable strip (16) which is held on a sector of rotating platen (12) by an endless loop (30) passing over two rollers (22,24). A stylus assembly (40) between the roller (22,24) can pass current via selected styli through parts of the loop (30). The loop (30) has an outer electrically conductive layer and an inner electrically conductive and resistive layer which is contacted by the styli and is locally heated by the current flow. The loop (30) and paper (16) are in contact and move in synchronism over a common path section, when heat generated in the loop (30) transfers to and heat-develops the paper.

公开(公告)号：DE3278876D1

公开(公告)日：1988-09-15

申请号：DE3278876

申请日：1982-05-07

Applicant: IBM

Inventor： CROOKS WALTER ,  HAFER CAMERON HENRY ,  WEICHE WILLIAM JOSEPH

IPC: B41J2/32 ,  B41J2/335 ,  B41J3/20

公开(公告)号：GB1101214A

公开(公告)日：1968-01-31

申请号：GB260066

申请日：1966-01-20

Applicant: IBM

Inventor： MULVANY RICHARD BURKE ,  STORM ELWOOD HENSLUR ,  HAFER CAMERON HENRY ,  PLANTE CAMILLE ARTHUR

IPC: G03C5/18 ,  G03D5/00 ,  G03D7/00

Abstract: 1,101,214. Photographic developing apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 20, 1966 [Feb. 3, 1965; March 17, 1965], No. 2600/66. Heading G2A. Apparatus 18 for developing photographic film by passing ammonia under pressure across film surface 17 comprises a seal plate 19 having a diffuser plate 16 placed in a cavity therein and a closure platen 22 which presses an inserted film tightly against the seal plate 19. Ammonia under pressure is fed by a valve 32 to a hole 28 in the base of the plate 19 and from there it flows as indicated, forcing the trapped air before it into a reservoir 15. In another embodiment, Figs. 1, 2 (not shown), the trapped air is forced into a reservoir (11) between a metal seal (2) and an elastomer seal (3). In a further embodiment, Figs. 5-7 (not shown), a three way solenoid valve (110) controls the feeding of ammonia from a store to a development cavity (114), and after development, to exhaust the ammonia out of the development platen into an absorber (115). A fluid other than ammonia may be used.