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    2.
    发明专利
    未知

    公开(公告)号：DE2459157A1

    公开(公告)日：1975-06-26

    申请号：DE2459157

    申请日：1974-12-14

    Applicant: IBM

    Inventor： CAUDILL ALLISON HOLLAND ,  HOEKZEMA RONALD JOSEPH ,  WILSON CLEMENT C ,  LEXINGTON KY

    IPC: G03G15/08 ,  G03G21/10

    Abstract: A portion of a xerographic development material is slowly circulated past a vertically oriented porous wall where it serves as a filter for airborne toner particles flowing therethrough. Toner enriched development material is returned to the main body of development material for reuse. Toner particles cleaned from residual xerographic images are conveniently transported by airflow entrainment to the development material filter.

    3.
    发明专利
    未知

    公开(公告)号：DE2362915A1

    公开(公告)日：1974-07-04

    申请号：DE2362915

    申请日：1973-12-18

    Applicant: IBM

    Inventor： BINGHAM RONALD EUGENE ,  CECIL II THOMAS FREDERICK ,  LEXINGTON KY ,  GALLI GUIDO ,  POQUETTE GEREON ELMER

    IPC: G03G15/02

    Abstract: A negatively biased corona discharge system includes a conductive electrode having a thin inorganic dielectric outer layer bonded thereto which is employed as a corona discharge electrode. The discharge system is utilized for uniformly placing a negative charge on an insulator substrate such as an electrophotographic imaging surface. The coating on the electrode acts to suppress the widely spaced emission nodes common to all negatively biased metal corona discharge electrodes. The coated electrode may, therefore, be placed in close proximity to the substrate which it is charging and operated at low emission densities without sacrificing charge uniformity thereby reducing the power requirement of the corona discharge system.

    5.
    发明专利
    未知

    公开(公告)号：DE2823965A1

    公开(公告)日：1979-01-04

    申请号：DE2823965

    申请日：1978-06-01

    Applicant: IBM

    Inventor： KETTLER HOWARD GEORGE ,  KOLPEK ROBERT ADOLPH ,  LEXINGTON KY ,  ROSENBAUM WALTER STEVEN

    IPC: B41J19/32 ,  B41J19/58 ,  B41J19/64 ,  B41J25/12 ,  B41J25/22 ,  G06F3/12 ,  G06F17/21 ,  G06K15/00 ,  G06K15/08 ,  B41B27/36

    Abstract: The aesthetic characteristics of adjacent characters are used to enhance the quality of output in a proportional spacing printer and to provide right margin justification for composing. Spacing between characters is determined on the basis of the character being printed and the preceding character already printed on the page. An intercharacter displacement memory contains a list of ideal spacing for all combinations of characters to be printed. As each character is typed, it and the previously stored preceding character address the intercharacter displacement memory. The output of the intercharacter displacement memory is the ideal value of escapement for this combination of characters and font style. The printer positions the print head prior to printing the next character, rather than positioning the print head after the previous character is printed. Line ending decisions for composing are eliminated during initial and final typing of a document by adding to the intercharacter displacement memory recommendations for altering the ideal spacing between characters, where aesthetically possible, to eliminate the need for line ending hyphenation. During initial keying, escapements for adjacent pairs of characters are totaled in a memory for ideal, shortest (tight), and longest (loose) recommended escapements. The line is automatically terminated within the justification range by a carrier return function based on the escapement totals and the selected right margin. Final playout of the page from memory alters the intercharacter escapements from the ideal values to either longer or shorter escapements depending on whether the line is to be lengthened or shortened.

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