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    BI-DIRECTIONAL, SELF IMAGING GRATING DETECTION APPARATUS
    3.
    发明专利
    BI-DIRECTIONAL, SELF IMAGING GRATING DETECTION APPARATUS 未知

    公开(公告)号：CA1087268A

    公开(公告)日：1980-10-07

    申请号：CA326058

    申请日：1979-04-19

    Applicant: IBM

    Inventor： CIALONE DAVID R ,  WEST DONALD L

    IPC: G01B11/00 ,  G01D5/245 ,  G01D5/36 ,  G01D5/38 ,  G01P13/04 ,  G01B11/14

    Abstract: BI-DIRECTIONAL, SELF IMAGING GRATING DETECTION APPARATUS An optical position sensing apparatus utilizing a grating having two sets of opaque and transparent lines thereon, one of the sets being off-set from the other is associated with a source-detector assembly, the source and detector assembly including pairs of light sources and detection devices with at least one of the devices of one of the pairs being aligned with one set of light interrupting opaque lines and the other device of the pair being aligned with the other set of light interrupting opaque lines so that the image of the area illuminated by the opposing source is projected back upon the area of the grating in front of its respective detector as by an imaging reflect surface, preferably a concave mirror. Inasmuch as the illuminated areas are of the same phase, the projected images will also be of a similar phase. The grating lines in front of the detectors, however, are 90.degree. off-set due to the off-set of the grating lines. This causes the output signal from the detectors to have a phase relation which will permit direction sensing as to the movement of, for example, the carrier in an ink jet printer.

    INK JET PRINTING APPARATUS WITH LINE SWEEP AND INCREMENTAL PRINTING FACILITIES
    5.
    发明专利
    INK JET PRINTING APPARATUS WITH LINE SWEEP AND INCREMENTAL PRINTING FACILITIES 未知

    公开(公告)号：CA986170A

    公开(公告)日：1976-03-23

    申请号：CA178371

    申请日：1973-08-08

    Applicant: IBM

    Inventor： FOWLER RAYMOND L ,  HILL JAMES D ,  MCCORNACK RICHARD W ,  PERKINS N KENNETH ,  WEST DONALD L ,  WILLIAMS THOMAS H ,  YOSMALI KRIKOR ,  SENDELWECK MICHAEL L

    IPC: B41J19/20 ,  B41J21/18 ,  B41J29/18

    Abstract: An ink jet printing apparatus is described having facilities for printing information in character locations, (boxes) each character location comprising a plurality of vertical columns of drop locations, and a number of characters comprising a line of information. Structures and circuits are included for insuring correct location of information within the character boxes and also providing for one mode in which characters are printed continuously line-by-line and another mode in which characters are printed incrementally character-by-character. During incremental printing, as well as the first character in a line or group of characters, provision is made for re-bounding the printhead back into the box of the character just printed, that is, prior to the next character box to be printed to insure that when the printhead starts up again for the next character that all drop components for that character, including any located in the immediate vicinity of the character boundary, are properly placed during printing.

    INCREASING THROUGHPUT IN INK JET PRINTING BY DROP SKIPPING AND REDUCING INK JET MERGING AND SPLATTER USING A STAIRSTEP GENERATOR
    10.
    发明专利
    INCREASING THROUGHPUT IN INK JET PRINTING BY DROP SKIPPING AND REDUCING INK JET MERGING AND SPLATTER USING A STAIRSTEP GENERATOR 未知

    公开(公告)号：CA978583A

    公开(公告)日：1975-11-25

    申请号：CA178367

    申请日：1973-08-08

    Applicant: IBM

    Inventor： HILL JAMES D ,  NAYLOR HUGH E III ,  WEST DONALD L ,  WILLIAMS THOMAS H

    IPC: B41J2/075 ,  B05B5/025 ,  B41J2/08 ,  G06K15/10

    Abstract: 1385137 Printers INTERNATIONAL BUSINESS MACHINES CORP 4 Sept 1973 [13 Oct 1972] 41513/73 Heading G4H In an ink drop printer, one or more of a predefined sequence of ink-drop-deflection signals can be skipped through to speed up printing. After a shift register has been loaded via another shift register with a bit sequence for a given column of a character dot matrix, from a character generator, the bit sequence is shifted out, each "1" bit gating a slow clock train to a counter and permitting a D/A converter fed by the counter to control charging of a respective ink drop which is then deflected by a constant field by an amount dependent on the charge and therefore count. Each "0" bit zeroes the D/A converter output (so that the ink drop is caught in a gutter rather than deflected on to the paper) and gates a fast clock train to the counter so that the count position not required for printing is skipped through fast. To reduce ink spatter &c.' two or more sweeps down each column are made, with adjacent drops being deposited in different sweeps. A staircase generator may replace the counter and D/A converter.

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