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    TIME CORRECTION SYSTEM FOR MULTI-NOZZLE INK JET PRINTER
    12.
    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.

    METHOD AND APPARATUS FOR ERASING INK JET PRINTING
    15.
    发明专利
    METHOD AND APPARATUS FOR ERASING INK JET PRINTING 未知

    公开(公告)号：CA1174266A

    公开(公告)日：1984-09-11

    申请号：CA414992

    申请日：1982-11-05

    Applicant: IBM

    Inventor： AVIRAM ARI ,  KOVAC ZALATA ,  MYERS ROBERT A

    IPC: B41J2/01 ,  B41J29/26 ,  B41J29/36 ,  C09D11/00 ,  B41J3/04

    Abstract: Y0980-057 METHOD AND APPARATUS FOR ERASING INK JET PRINTING The technology encompassed by the practice of this invention includes apparatus for ink jet printing under the control of electronic circuitry and ink jet printing under the control of an operator, for example, a typewriter. Broadly, the technology presented in accordance with the principles of this invention utilizes an ink eradicator which removes indicia of the ink by chemical reaction. The character of the eradicator fluid is such that another fluid may be utilized either together therewith or separately to neutralize the residue from the chemical reaction so that printing can readily be accomplished in the location where erasure has occurred. Specifically, practice of this invention is contemplated with means that applies the eradicator fluid over the location on a surface where printing has occurred by ink jet droplets as well as over an entire area thereon within which there is ink jet printing for which a change is to be achieved. For exemplary embodiments of this invention, the eradicator fluid is applied by a wick from a reservoir and the chemical reaction is enhanced by heating the location for the erasure by an external heating means.

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