US3553676A - Electro-optical composition system - Google Patents

Electro-optical composition system Download PDF

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Publication number
US3553676A
US3553676A US701769*A US3553676DA US3553676A US 3553676 A US3553676 A US 3553676A US 3553676D A US3553676D A US 3553676DA US 3553676 A US3553676 A US 3553676A
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Prior art keywords
character
characters
data
register
counter
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Expired - Lifetime
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US701769*A
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English (en)
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Salvatore A Raciti
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RCA Corp
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RCA Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B27/00—Control, indicating, or safety devices or systems for composing machines of various kinds or types
    • B41B27/28—Control, indicating, or safety devices for individual operations or machine elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B19/00—Photoelectronic composing machines
    • B41B19/01—Photoelectronic composing machines having electron-beam tubes producing an image of at least one character which is photographed

Definitions

  • An electro-optical composition system includes an electro-optical imaging device, such as a cathode ray tube, that forms patterns, such as characters of given point sizes, by a plurality of successive scanlines that create character slices.
  • FIG. 2 is an illustration of the formation of a character by the system of FIG. 1, and
  • FIG. 3 is an illustration of the formation of a character of a proofing quality.
  • FIG. 2 An enlarged View of a character 14 that is formed by the system 10 is shown in FIG. 2.
  • the character 14 comprises a capital H of a given point size from a sans serif font.
  • the capital H as well as all of the other characters and patterns created by the photocomposition system 10, are formed by a plurality of black vertical segments 36.
  • the segments 36 are character slices that comprise portions of the scans or scanline when the electron beam 18 in the tube 12 is unblanked.
  • a scan or a scanline is one vertical traversal of the face 16 of the tube 12 by the scanning beam 18, of course horizontal scanning may also be utilized in practicing the invention.
  • Those portions of the scans wherein the electron beam 18 is blanked are white segments 38 and representative ones are shown dashed in FIG. 2.
  • the black segments 36 are actually white on a dark background whereas the segments 36 are shown dark on a light background in FIG. 2 for illustrative purposes.
  • the black segments 36 overlap each other and are selected to be numerous enough such that a character of a substantially uniform density is formed on the photographic film 30.
  • the capital H is seated on a character baseline 37 and ascends above this baseline a predetermined amount as determined by the point size of the character.
  • a point size twice as great as the given point size of the character H comprises a character twice as high and twice as wide as the character H in FIG. 2. The inverse is true for a character one half the point size of the character H, etc.
  • each one of the primary locations of the memory 50 is actually an address for the location in the secondary portion of the memory which stores the first of the coded parameters that define the corresponding character.
  • the character code is utilized to address the character in the primary portion of the memory 50
  • the number read from the memory provides a secondary address for the secondary portion of the memory 50 that begins a block of secondary address locations wherein the coded parameters of the character are stored successively.
  • the advantages derived from such an arrangement in the memory 50 is that identical letters in each font have the same character code.
  • the same character in two different fonts has the same character code but the character code of the character in the second font is incremented by a fixed number to arrive at the address of the character in the primary portion 52 of the memory 50. This is so because the fonts are stored in sequence and in the same progression from A to Z etc. Of course each font has different secondary addresses.
  • the tape reader 62 after reading data from the tape 60 into the register 64, generates a start pulse to trigger the start of a timing control circuit 70 to start the transfer of data into and through the system 10.
  • the timing control circuits 70 are standard timing circuits for providing the necessary trains of timing signal pulses (TP) for transferring data into and through the system 10.
  • the timing pulses TP are subscripted sequentially in accordance with the time of their generation, i.e. TP1 is first,
  • the system allows rapid change of point size.
  • the horizontal counter 94 moves 6 increments between scans for a 6 point character and 7 increments for a 7 point character. Therefore, the horizontal distance between scans changes in the proper proportion as the point size is changed.
  • the spacing control register 73 also linearly controls the gain of the vertical driver 112 through a DACON 113. The vertical size of the character changes in proper proportion as the point size is changed.
  • the scanning spot 26 may be enlarged by defocusing to cause successive scanlines to touch.
  • the tape reader 62 reads the point size, the granularity, and the font style, of the characters to be printed from the tape 60.
  • the point size of a character is applied through the transfer gates 71 to be stored in the spacing control register 73 due to the initiation of the timing control circuit 70 by the tape reader 62.
  • the character code of the high graphic quality character H which is a primary address in the memory 50, is then read from the tape 60. The contents of this address specify the secondary address of the first item of the block of data required to form the character H of this font.
  • the character code is coupled directly to the address register 68.
  • the contents of this first primary location is therefore read out of the memory 50 and into the data register 78. Since this data is actually a secondary address, it is transferred into the address register 68 via the transfer gates 82.
  • the address register 68 therefore now addresses the first location in the secondary portion of the memory 50 wherein the format and other data relating to the formation of the character H from the high graphic quality font begins. Consequently, the leading side bearing (LSB) of the character H is read out of the memory 50 and into the data register 78.
  • the leading side bearing data is then coupled through the transfer gates 84 to the binary adder 86 where it is added to the contents'of the register 90.
  • Each black segment of the character H in the left hand portion thereof is imaged onto the photosensitive film in a manner similar to that described above.
  • the scan counter 116 is counted down by one.
  • the first segment to be written is a white segment.
  • the scanning beam is therefore turned off during the time the beam is traversing the portion of the scans that are shown dashed in FIG. 2. Otherwise, the operation of the system 10 is similar to that described previously.
  • the scan counter 116 has been down counted to zero and the zero decoder 118 signifies that the next character should be read by the tape reader 62.
  • second means coupled to said imaging device for increasing the spacing between said scanlines in said proofing characters so that corresponding characters of the same point size in both said graphic and proofing qualities occupy the same area.
  • a system in accordance with claim 1 that further includes, a counter for counting elements between adjacent scanlines of a character to determine the point size of a character.
  • composition system comprising in combination,

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  • Controls And Circuits For Display Device (AREA)
  • Character Input (AREA)
  • Facsimile Scanning Arrangements (AREA)
US701769*A 1968-01-30 1968-01-30 Electro-optical composition system Expired - Lifetime US3553676A (en)

Applications Claiming Priority (1)

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US70176968A 1968-01-30 1968-01-30

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US3553676A true US3553676A (en) 1971-01-05

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US701769*A Expired - Lifetime US3553676A (en) 1968-01-30 1968-01-30 Electro-optical composition system

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US (1) US3553676A (fi)
BE (1) BE727596A (fi)
DE (1) DE1904621A1 (fi)
FR (1) FR1604077A (fi)
GB (1) GB1258295A (fi)
NL (1) NL6901448A (fi)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731610A (en) * 1969-03-17 1973-05-08 Linotype Paul Ltd Electro-optical printer with variable spacing and width control
US3746447A (en) * 1971-07-07 1973-07-17 California Computer Products Marker enlarger
US3754459A (en) * 1972-06-02 1973-08-28 Cps Ass Inc Ideographic-language input apparatus publication system utilizing same
US3848232A (en) * 1973-07-12 1974-11-12 Omnitext Inc Interpretive display processor
US3868672A (en) * 1973-01-02 1975-02-25 Honeywell Inf Systems Cathode ray tube control apparatus for displaying upper and lower case characters using a single matrix
US3946407A (en) * 1973-09-05 1976-03-23 Shaken Co., Ltd. Manually operated photocomposing apparatus
US4060322A (en) * 1974-07-10 1977-11-29 Canon Kabushiki Kaisha Image information handling device
US4107664A (en) * 1976-07-06 1978-08-15 Burroughs Corporation Raster scanned display system
US4241340A (en) * 1978-05-26 1980-12-23 Harris Corporation Apparatus for generating displays of variable size characters
US4254468A (en) * 1979-05-03 1981-03-03 Eltra Corporation Typesetter character generating apparatus
US4298945A (en) * 1978-05-12 1981-11-03 Eltra Corporation Character generating method and apparatus
US4308532A (en) * 1978-12-20 1981-12-29 International Business Machines Corporation Raster display apparatus
US4322717A (en) * 1978-09-18 1982-03-30 Tokyo Shibaura Denki Kabushiki Kaisha Recording character configuration changing system
US4393376A (en) * 1981-06-04 1983-07-12 Zenith Radio Corporation Teletext interface for digital storage medium having synthetic video generator
US4418345A (en) * 1980-12-24 1983-11-29 International Business Machines Corporation Displaying a full page representation
US4584574A (en) * 1983-09-14 1986-04-22 International Business Machines Corporation Information display and editing system
US4586835A (en) * 1984-04-20 1986-05-06 International Business Machines Corporation Printer for printing characters in two alternative print qualities
US4593355A (en) * 1983-11-21 1986-06-03 American Science And Engineering, Inc. Method of quick back projection for computed tomography and improved CT machine employing the method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731610A (en) * 1969-03-17 1973-05-08 Linotype Paul Ltd Electro-optical printer with variable spacing and width control
US3746447A (en) * 1971-07-07 1973-07-17 California Computer Products Marker enlarger
US3754459A (en) * 1972-06-02 1973-08-28 Cps Ass Inc Ideographic-language input apparatus publication system utilizing same
US3868672A (en) * 1973-01-02 1975-02-25 Honeywell Inf Systems Cathode ray tube control apparatus for displaying upper and lower case characters using a single matrix
US3848232A (en) * 1973-07-12 1974-11-12 Omnitext Inc Interpretive display processor
US3946407A (en) * 1973-09-05 1976-03-23 Shaken Co., Ltd. Manually operated photocomposing apparatus
US4060322A (en) * 1974-07-10 1977-11-29 Canon Kabushiki Kaisha Image information handling device
US4107664A (en) * 1976-07-06 1978-08-15 Burroughs Corporation Raster scanned display system
US4298945A (en) * 1978-05-12 1981-11-03 Eltra Corporation Character generating method and apparatus
US4241340A (en) * 1978-05-26 1980-12-23 Harris Corporation Apparatus for generating displays of variable size characters
US4322717A (en) * 1978-09-18 1982-03-30 Tokyo Shibaura Denki Kabushiki Kaisha Recording character configuration changing system
US4308532A (en) * 1978-12-20 1981-12-29 International Business Machines Corporation Raster display apparatus
US4254468A (en) * 1979-05-03 1981-03-03 Eltra Corporation Typesetter character generating apparatus
US4418345A (en) * 1980-12-24 1983-11-29 International Business Machines Corporation Displaying a full page representation
US4393376A (en) * 1981-06-04 1983-07-12 Zenith Radio Corporation Teletext interface for digital storage medium having synthetic video generator
US4584574A (en) * 1983-09-14 1986-04-22 International Business Machines Corporation Information display and editing system
US4593355A (en) * 1983-11-21 1986-06-03 American Science And Engineering, Inc. Method of quick back projection for computed tomography and improved CT machine employing the method
US4586835A (en) * 1984-04-20 1986-05-06 International Business Machines Corporation Printer for printing characters in two alternative print qualities

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Publication number Publication date
DE1904621A1 (de) 1969-09-04
GB1258295A (fi) 1971-12-30
NL6901448A (fi) 1969-08-01
FR1604077A (fi) 1971-07-05
BE727596A (fi) 1969-07-01

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