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    PROCESS FOR SELECTIVELY REINKING USED THERMAL TRANSFER PRINTING RIBBON AND METHOD FOR MAKING A COLLOIDAL DISPERSION FOR USE IN SAID PROCESS
    12.
    发明专利
    PROCESS FOR SELECTIVELY REINKING USED THERMAL TRANSFER PRINTING RIBBON AND METHOD FOR MAKING A COLLOIDAL DISPERSION FOR USE IN SAID PROCESS 未知

    公开(公告)号：DE3164510D1

    公开(公告)日：1984-08-09

    申请号：DE3164510

    申请日：1981-03-06

    Applicant: IBM

    Inventor： AVIRAM ARI ,  KUHN LAWRENCE ,  PENNINGTON KEITH

    IPC: B41J2/325 ,  B41J2/32 ,  B41J31/14 ,  B41M5/025 ,  B41M5/382 ,  C25D13/06 ,  C25D13/16 ,  B41M5/26

    Abstract: The process for selectively reinking used thermal transfer printing ribbons comprises the stationary or moving exposure of the ribbon to a pigment-containing polymeric colloidal dispersion of electrophoretically depositable ink, and passing an electric current through said colloidal dispersion, with an electrically conductive layer of said ribbon serving as one electrode, to electrophoretically deposit the said colloidal dispersion on areas of said ribbon that have been depleted of ink in a previous printing operation, to form a continuous ink layer of uniform … The method of making said colloidal dispersion involves heating a water-insoluble polymeric binder to a liquid state, blending a pigment into the melted polymeric binder, blending a heated dilute aqueous solution of a carboxylic acid into the foregoing, then blending a colloid charge-forming com pound to the composition, and cooling the dispersion so formed.

    14.
    发明专利
    未知

    公开(公告)号：DE2842755A1

    公开(公告)日：1979-04-12

    申请号：DE2842755

    申请日：1978-09-30

    Applicant: IBM

    Inventor： GIORDANO FRANCIS PETER ,  KUHN LAWRENCE ,  LANE RAMON ,  LEE CHEN-HSIUNG ,  ZIERDT GENE OVERHOLTS ,  SAN JOSE CALIF

    IPC: B41J2/02 ,  B41J2/025 ,  B41J3/04

    Abstract: An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.

    16.
    发明专利
    未知

    公开(公告)号：DE2657484A1

    公开(公告)日：1977-08-04

    申请号：DE2657484

    申请日：1976-12-18

    Applicant: IBM

    Inventor： BASSOUS ERNEST ,  KUHN LAWRENCE

    IPC: B41J2/16 ,  B41J2/085 ,  B41J2/09 ,  G01D15/18 ,  G06K15/10 ,  H04N1/034 ,  B41J3/04

    Abstract: A charge electrode array for use in an ink jet printing apparatus is formed by anisotropic etching of apertures through a single crystal silicon substrate of (110) orientation. Conductive diffusion layers in the walls of and adjacent to the apertures permit a charge to be placed on a jet stream passing through the apertures. Contacts can be formed on the adjacent diffusion layers to provide connection to an externally located charging circuit or the contacts may be omitted when the charging circuit is formed in the substrate itself and connected by diffusion or a metal layer to each adjacent diffusion layer. Jet nozzles and synchronization electrodes are shown incorporated in the charge electrode array to form a monolithic structure capable of performing a plurality of functions. Substrate contacts are also provided for biasing.

    INK JET PRINTING HEAD
    18.
    发明专利
    INK JET PRINTING HEAD 未知

    公开(公告)号：CA1098161A

    公开(公告)日：1981-03-24

    申请号：CA305225

    申请日：1978-06-12

    Applicant: IBM

    Inventor： GIORDANO FRANCIS P ,  KUHN LAWRENCE ,  LANE RAMON ,  LEE CHEN-HSIUNG ,  ZIERDT GENE O

    IPC: B41J2/02 ,  B41J2/025 ,  B41J3/04 ,  G01D15/18

    Abstract: INK JET PRINTING HEAD An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.

    TIME CORRECTION SYSTEM FOR MULTI-NOZZLE INK JET PRINTER
    19.
    发明专利
    TIME CORRECTION SYSTEM FOR MULTI-NOZZLE INK JET PRINTER 未知

    公开(公告)号：CA1085445A

    公开(公告)日：1980-09-09

    申请号：CA288136

    申请日：1977-10-04

    Applicant: IBM

    Inventor： KUHN LAWRENCE ,  MYERS ROBERT A ,  RUSSO ROY L

    IPC: B41J2/075 ,  B41J2/12 ,  B41J2/125 ,  B41J3/04 ,  G01D15/16

    Abstract: TIME CORRECTION SYSTEM FOR MULTI-NOZZLE INK JET PRINTER In an ink jet nozzle per spot printer, the transit time of each stream is measured on a periodic basis. In response to the measured transit times, the time at which information imparting signals are applied to the respective charge electrodes is controlled. The transit time is measured (counted) in units of a drop cycle. The slowest count is detected, and the difference is taken between the transit time of the slowest stream and all other streams. In the instance when there is a transit time difference of zero between the slowest stream and a given stream, the printing signal is provided to the charge electrode without delay. In the instances when a transit time difference is detected, an information imparting signal is applied to the charge electrode with a delay dependent upon the sensed transit time difference. A data register has information signals stored therein which are indicative of the data to be printed. Such data will be printed during an appropriate portion of a data cycle. The data cycle is broken down into several drop formation periods, any one of which can be used to provide a delayed information signal by means of a correction register. The correction register has data stored therein indicative of whether the information stored in the data register is to be applied to the respective charge electrodes during a specific drop formation period. An output register responds to inputs from the data register and correction register for passing the information imparting signals to the respective charge electrodes in the proper timing sequence.

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