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Patent Agency Ranking
公开(公告)号：CA1209244A
公开(公告)日：1986-08-05
申请号：CA441822
申请日：1983-11-24
Applicant: IBM
Inventor： FEDAK JOHN F , FINDLEY GERALD I , TORR TERRY A
Abstract: Image or character data in the form of a rectangular array of binary 1s and 0s (bits) are divided into a plurality of segments, such as thirty-two by thirty-two bit segments or one bit by eight bit or byte segments. The image data is scanned for identifying all-zero segments (background) which are ignored and non-zero segments (foreground) which are transmitted or stored with offset and length (number of successive non-zero segments). The compacted image data is suitably indexed for facilitating image expansion using simple techniques. All compaction and decompaction machine operations are independent of bit-significant informational content of the segments. Presentation of the uncompacted data uses any printer or display type of device.
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公开(公告)号：CA1051349A
公开(公告)日：1979-03-27
申请号：CA236360
申请日：1975-09-25
Applicant: IBM
Inventor： FINDLEY GERALD I , CUMMINGS KENNETH D , ANDERSON TEDDY L
IPC: B41B19/00 , B41J2/44 , B41J2/485 , B41J5/30 , G03G15/22 , G06F3/12 , G06K15/12 , H04N1/23 , G06F7/32
Abstract: INTERMIXED PITCHES IN A BUFFERED PRINTER In a printer in which character code bytes representing characters to be printed are translated into graphic code bytes, assembled into lines and pages, and thereafter used to select character image bits which are applied to modulate a scanning laser beam and thereby effect printing of the characters, the pitch of each character is determined independently of other characters in each line being printed by pitch bits included in the sets of character image bits. As each scan line of modulation bits from a set of character image bits is selected for use in modulating the laser beam, the pitch bit included within the bits is examined to determine whether the width of the character is to be a maximum or some value less than the maximum. For the maximum width all of the modulation bits are applied to modulate the laser beam, while for a character cell width less than the maximum, only a selected number of the modulation bits are used to modulate the laser beam. An oscillator maintains a constant clock rate for the system as it defines modulation periods for the individual bits, while associated timing circuitry controls the serial flow of selected modulation bits to modulate the laser beam as well as the successive addressing of the different graphic code bytes in the line being printed.
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公开(公告)号：CA1044608A
公开(公告)日：1978-12-19
申请号：CA236361
申请日：1975-09-25
Applicant: IBM
Inventor： FINDLEY GERALD I , ANDERSON TEDDY L
IPC: B41J2/44 , B41B19/00 , B41J5/30 , B41J29/50 , G03G15/22 , G06F3/12 , G06F17/21 , G06K15/10 , G09G5/00 , H04N1/23 , G06K15/02
Abstract: ELECTRONIC HORIZONTAL SHIFTING AND VARIABLE PRINT WIDTH IN A BUFFERED PRINTER In a buffered printer in which lines of graphic code bytes representing characters to be printed are successively advanced to a line buffer where they are sequentially sampled and the results used to modulate a laser beam undergoing successive scans of a printable medium to effect printing of the characters, an arrangement is provided for determining the size of the lefthand margin of the printable medium and the location adjacent the right-hand edge of the printable medium where printing is to be terminated. The arrangement sums count values representing a fixed offset adjacent the left edge of the printable medium and the distance between the end of the fixed offset and the horizontal location of the desired margin as determined by plural panel mounted switches to provide a first count which is carried out beginning wit the start of each scan of the laser beam. Upon termination of the first count, sampling of the graphic code bytes and modulation of the laser beam are initiated simultaneously with the beginning of a second count representing the width of the printable medium minus the count value from the panel mounted switches. Upon completion of the second count, sampling of the graphic code bytes and modulation of the laser beam are terminated until the next scan is begun.
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公开(公告)号：CA1042354A
公开(公告)日：1978-11-14
申请号：CA235830
申请日：1975-09-18
Applicant: IBM
Inventor： FINDLEY GERALD I
IPC: B41B19/00 , B41B27/00 , B41J2/44 , B41J21/00 , G03G15/36 , G03G21/00 , G06F3/12 , G06K15/00 , G06K15/12 , G06T11/00 , G09G5/00 , H04N1/00
Abstract: PRINTER A printer responds to channel commands including coded data received over a channel from a data processing unit by printing characters represented by the coded data using an electrophotographic printing arrangement. The coded data received by the printer is first translated into corresponding graphic codes or addresses by a translate table employing a predetermined translation code, following which the addresses are used to locate sets of character image bits stored within a plurality of character generator modules. Each set of character image bits is used to modulate a laser scan of a printing drum to effect printing of desired characters. Both the translate table and the character generator modules are program alterable, and the data stored therein can be loaded directly from or changed in response to data and instructions from the data processing unit. In addition the locations of the addresses stored in the translate table can be changed to accommodate a new code for the incoming data, and the same address can be stored in more than one location in the translate table so that the same character can be printed in response to different codes of the incoming data. New graphic characters to be added or substituted in the character generator modules are communicated over the channel in a form which includes a code identifying the particular character generator module and locations therein at which a set of character image bits is to be stored and graphic character data which is converted and reformated into the desired set of character image bits. Pages of graphic codes can have minor changes made therein during printing to print multiple copies of various forms. Modification data for each copy and which is communicated to the printer from the data processing unit is employed, as necessary, to modify the graphic codes of each given page on a line-by-line basis, as each different copy of the page is printed.
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