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    INK JET PRINTERS WITH INK DROP COMPENSATION AND METHOD OF INK DROP COMPENSATION
    2.
    发明专利
    INK JET PRINTERS WITH INK DROP COMPENSATION AND METHOD OF INK DROP COMPENSATION 未知

    公开(公告)号：DE3065104D1

    公开(公告)日：1983-11-10

    申请号：DE3065104

    申请日：1980-02-28

    Applicant: IBM

    Inventor： FILLMORE GARY LEE

    IPC: B41J2/08 ,  B41J2/12 ,  G06K15/10 ,  B41J3/04

    Abstract: The flight path of drops from an ink jet printer nozzle are corrected to reduce print position error on the print media. It has ben found that drops as far as 30 drop positions ahead of a particular drop in the ink stream can have an effect on the flight path of that particular drop to the print media. Using a memory to store 2 compensation values to correct the flight of the drop for all possible combinations of drop patterns in the ink stream is not practical. A smaller number of compensation values are used to correct the flight path by grouping the drops remote in position from the drop being compensated into blocks of drops and treating each entire block of drops as contributing one effect on the flight of the drop. Accordingly, drops D1 to D7 close to the compensated drop are treated as having an individual effect on the flight path while drops remote from the compensated drop R are grouped into one or more blocks A, B, C and each block is treated as having a single effect on the compensated drop R.

    LIQUID DROPLET FORMING APPARATUS
    7.
    发明专利
    LIQUID DROPLET FORMING APPARATUS 未知

    公开(公告)号：DE2961900D1

    公开(公告)日：1982-03-04

    申请号：DE2961900

    申请日：1979-10-29

    Applicant: IBM

    Inventor： FILLMORE GARY LEE ,  HOFFMAN ARTHUR ROWLAND ,  YOUNG THOMAS

    IPC: B41J2/02 ,  B41J2/155 ,  B41J2/21 ,  B05B1/08

    Abstract: The Figure shows an ink jet head 10 comprising a housing 12 having a cylindrical passage 20 containing a cylindrical tube 19 formed of piezo-electric material. A nozzle plate 49 is attached to the housing to register with a portion 46 of the housing wall of reduced thickness. Apertures 47 through the wall portion 46 register with nozzles 48 in the plate 49. The tube 19 is subject to an electric field established between an electrode formed internally of the tube and pressurized conductive ink in the passage 20. Longitudinal vibrations in the tube 19 are absorbed by resilient mountings 22, 23. When tube 19 is electrically excited pressure waves are set up in the ink in passage 20 and the ink jets issuing from nozzles 48 are caused to break-up into similar streams of ink drops. … In a modification the wall portion 46 is removed and the aperture so formed oovered by a flexible sheet diaphragm held against the housing by a manifold plate interposed between the none plate and the housing. The manifold plate has an open-sided recess registering with the housing wall aperture and communicating with the nozzles through an array of outlets through the bottom of the recess. In this modification the passage 20 is filled with liquid and ink is supplied under pressure to the manifold plate recess. Pressure waves established in the passage 20 are transmitted through the diaphragm in the ink in the manifold plate recess.

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