US3521293A - Character printing apparatus - Google Patents

Character printing apparatus Download PDF

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Publication number
US3521293A
US3521293A US388182A US3521293DA US3521293A US 3521293 A US3521293 A US 3521293A US 388182 A US388182 A US 388182A US 3521293D A US3521293D A US 3521293DA US 3521293 A US3521293 A US 3521293A
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United States
Prior art keywords
character
printing
pulses
electrode
pulse
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Expired - Lifetime
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US388182A
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English (en)
Inventor
Gerhard Haas
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US Philips Corp
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US Philips Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/5056—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements using dot arrays providing selective dot disposition modes, e.g. different dot densities for high speed and high-quality printing, array line selections for multi-pass printing, or dot shifts for character inclination
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/39—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material using multi-stylus heads
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/10—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by matrix printers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer

Definitions

  • FIG.4 CHARACTER PRINTING APPARATUS Filed Aug. '7, 1964 5 Sheets-Sheet ⁇ a T 1I2I I4
  • the invention relates to an electronically controlled character printing apparatus comprising recording members cooperating with a printing surface and adapted to produce thereon, under the control of electrical pulses originating from a character generator matrix, printed areas selected from a matrix of possible areas, said selected printed areas representing the desired character.
  • the character generator matrix generally consists of a magnetic core matrix provided with read-in wires or character set windings, each following the physical pattern of a different one of the characters or symbols which may have to be printed.
  • the recording members may consist of mechanical printing members, such as a group of electro magnetically operable wires.
  • Electrographic or ferrographic printing that is the printing of an electric or a magnetic charge pattern corresponding to the desired character may be obtained by means of a plurality of energizable wires arranged transversely to the printing surface or one or more elongated energizable members extending parallel to said surface and cooperating with a movable conductive or magnetic member on the other side of said printing surface.
  • the invention has for its object to provide for an electronically controlled character printing apparatus of the above specified kind, in which the form or type of the characters printed may be almost instantaneously changed-over from one type to another, for instance in the time-interval between the printing of two consecutive characters, without thereby having to increase that interval over its normal length. Accordingly, in a particular embodiment the printing of normal perpendicular characters may alternate with the printing of italicized characters without impairing the printing speed.
  • this object is achieved by the provision of at least one pulse delaying device in a pulse transmission path between the character generator matrix and the recording members, the pulse delaying device effecting a delay in the printing of a part of the selected areas.
  • a plurality of pulse delaying devices each exhibiting a different delay time and each adapted to delay the electrical pulses originating from the elements of a diiferent row or column of said character generator matrix.
  • FIG. 1 illustrates the principle of an electrographic printer according to the invention comprising 9 fixed elongated printing-electrodes,
  • FIG. 2 serves to demonstrate the required delay-times of the energizing pulses to the various printing electrodes for obtaining italicized characters
  • FIG. 3 schematically illustrates an embodiment of the invention
  • FIG. 4 illustrates a further embodiment utilizing shiftregisters as pulse-delaying devices
  • FIG. 5 is a pulse-time diagram relating to the embodiment of FIG. 4,
  • FIG. 6 is used to demonstrate the various delay-times in priting normal perpendicular (90) or italicized characters and
  • FIG. 7 illustrates means for obtaining clock-pulses for the shift registers in the embodiment of FIG. 4.
  • the electrographic character printing apparatus shown in FIG. 1 comprises as recording members for printing an electric charge pattern upon a printing surface 11, nine parallel extending fixed line-electrodes 1-9 arranged on one side of the printing surface 11 and one movable line-electrode 10 on the other side of said surface.
  • the printing surface 11, ' which may be a paper tape or a sheet recording paper, is adapted to be moved in the direction p, transverse to the direction of the lines to be printed, whereas the movable electrode 10 is adapted to be moved in the direction of the line to be printed, that is the longitudinal direction of the electrodes 1 9 at a constant speed V.
  • Printing is done by applying electrical pulses to the various electrodes 1 9 with respect to the movable electrode 10 taking in account the momentary position of the latter.
  • Such a pulse results in the establishment of an electric charge on the printing surface 11 at the location of the shortest distance between the relevant fixed electrode and the movable electrode at the moment of the arrival of the pulse on said fixed electrode.
  • any charge pattern representing a character or symbol corresponding to any selection out of a 7 x 9 matrix of dots may be printed. After having been printed the charge pattern is developed (made visible) in one of the well-known ways utilized in electrography, for example the xerography process.
  • the electric pulses applied to the electrodes 1 9 for generating a specific character are obtained by means of a character generator matrix 12 having nine horizontal rows, each connected to a different one of said electrodes.
  • the character generator matrix 12 comprises in this case seven vertical columns, this matrix accordingly being a 7 x 9 array, to which the matrix of possible character printing areas corresponds.
  • the series of electrical pulses applied to the electrodes 1 9 for printing a desired character are obtained by energizing those elements in the character generator matrix 12 arranged in the physical pattern of said character and thereafter sequentially pulsing the vertical rows of the matrix 12 in synchronism with the displacement of the movable electrode 11.
  • the pulsing of a vertical column of the character generator matrix 12 means that the pulses representing the intersections of the character to be printed with a vertical line are generated simultaneously.
  • the sequential pulsing of the vertical columns means that the pulses representing the intersection of the character to be printed with a horizontal line, i.e. any of the fixed electrodes 1 9, are generated sequentially.
  • the effect of a change in angle and thereby in inclination of the printed character is obtained solely by electrical means, to wit by inserting appropriate pulse delaying means 1 9 respectively between the character generator matrix 12 and each of the fixed electrodes 1 9.
  • the type of the character printed by the electrodes 1 9 in combination with the electrode 10 may be changed. Where the pulse-delaying devices 1 9' in that order exhibit a steadily increasing delay are simultaneously connected in series with their corresponding electrodes, a change in printed character from normal perpendicular type to italics will occur. The reverse occurs when all these delay devices are simultaneously short-circuited. If a movable electrode 10 extends at right angles to the longitudinal direction of the fixed electrodes 1 9 and it is desired that the characters be inclined with respect to the vertical by an angle a (FIG.
  • the decoding matrix 13 selects in the character generator matrix 12 the read-in wire following the pattern of the character or symbol represented by the information received by the decoding matrix 13.
  • Each of the nine horizontal rows in the character generator matrix 12 may be connected, either directly or over a pulse-delaying device 32 39, depending on the position of the associated switches 22 29 to its corresponding recording electrode 1 9.
  • the delaying times of the devices 32 39 are chosen in accordance with the above expression for 'r In the lower position of the switches 22 29 the characters are printed in normal perpendicular position. In the upper position of the switches the printed characters are italicized.
  • the simultaneous actuation of these switches 22- 29 may be triggered by means of a special input signal to the decoding matrix 13, resulting in appropriate voltages being sent to the switches 22-29, which preferably are electronic switches.
  • the pulse-delaying devices 32- 39 may be realized in various ways. Electrical or acoustical delay lines or lumped constant delay networks, for instance, may be used.
  • Clock-pulses such as these may be obtained by providing the driving means for moving the movable electrode with pulse generating means such as a magnetically or optically coded disc. These clock-pulses ensure that the printing control pulses supplied by the character generator matrix 12 to the electrode 9 are delayed by 8 clock pulses. In general the printing control pulses to electrode number k are delayed by k1 clockpulses.
  • Angle of inclination a 45 27 18 14 11 9 It may not always be possible-and it is not necessary--that the longitudinal direction of the movable electrode 10 is exactly perpendicular (or nearly so) to that of the fixed electrodes 1 9. Such is for instance the case when the movable electrode follows a helical line rotatable around its axis. In that case the invention may be utilized to on the one hand correct for the inclination of the movable electrode, so as to obtain normal perpendicular printed characters and on the other hand to obtain italicised characters having a different slant than the longitudinal direction of the movable electrode.
  • the movable electrode encloses an angle 5 (FIG. 6) with the vertical and the value of f3 corresponds with one of the values for a in the above table.
  • This may be obtained by an arrangement in many respects similar to that shown in FIG. 4, wherein now, however, the shift register supplying printing pulses to electrode 1 comprises 8 sections etc.
  • the clock-pulses may be obtained in the manner illustrated with FIG.
  • a rotatable magnetic code disc 15 comprising two circular magnetic pulse-tracks 16 and 17, is mechanically coupled with the means (not shown) for moving the movable electrode 10 so as to rotate with a speed proportional to the speed of said electrode 10.
  • the pulse-density of the tracks 16 and 17 is chosen such, that upon movement of the electrode 10 over the distance a the track 16 induces eight pulses in the associated reading head 18 and upon movement of the electrode 10 over the distance a the track 17 induces eight pulses in the reading head 19 associated with this track 17. Whether normal perpendicular characters or italics are printed is then governed by the position of the switch 20.
  • Electronically controlled character printing apparatus comprising a plurality of juxtapositioned pulse operable recording members arranged in a given pattern, a printing surface movable relative to said recording members, a character generator matrix for simultaneously generating a set of pulses containing character forming information, connecting means for applying the pulses from said matrix to each said recording member thereby to stimulate each said recording member to print a portion of a character on said recording surface and pulse delaying means within substantially all said connecting means and interposed between said character generator matrix and said recording members for delaying by different amounts each of the set of simultaneously generated pulses applied to said recording members thereby to alter, in proportion to the delay, the angular relation between adjacent components of a particular character printing by said apparatus.
  • Printing apparatus as claimed in claim 1 including switch means for selectively bypassing at least a portion of said pulse delaying means to reduce the delay produced thereby.
  • said pulse delaying means consists of shift registers, each having a different number of sections thereby to introduce different delays in different portions of a character, means for generating clock pulses, and means for coupling said clock pulse generating means to said shift registers, thereby to trigger said shift registers.
  • said clock pulse generating means includes means for sensing the relative motion between said printing surface and said recording members, and a variable frequency clock pulse oscillator responsive to said sensing means thereby to produce clock pulses having a frequency varying as a function of said motion.
  • the recording members consist of at least one fixed elongated element on one side of the printing surface and one movable element on the other side of the printing surface, said movable element traveling in a path approximately parallel with the longitudinal dimension of said fixed element, and including means for coupling said clock pulse generating means to said movable element to control the output frequency of said clock pulse generating means.
  • Electronically controlled character printing apparatus comprising a printing surface, a plurality of aligned juxtapositioned pulse operable recording members, each consisting of a fixed elongated element on one side of the printing surface, a character generator matrix for simultaneously generating a set of pulses containing character forming information, connecting means for applying the pulses from said matrix to said recording members thereby to selectively stimulate each said recording member to print a portion of a character on said recording surface, a plurality of shift registers within substantially all said connecting means and interposed between said matrix and said recording members, each said shift register having a different number of stages for delaying, by different amounts, each of the set of simultaneously generated pulses applied to said recording members thereby to alter, in proportion to the delay, the angular relations between adjacent components of a particular character printed by said apparatus, a coded magnetic disc coupled to the movable element of said recording members and having recording heads for producing clock pulses at a frequency varying as a function of the velocity of said movable element, means for coupling the clock pulses from said
  • a matrix printer the combination comprising: a set of M printer elements, each for printing a different portion of a character;
  • character print signal producing means having M output lines, one for each said actuating means;
  • the last-mentioned means is a set of switches, and wherein in one position of the switches the output print signals are applied to said first set of coupling means, and wherein in another position of the switches the output print signals are applied to the said second set of coupling means.
  • a character is normally formed on a document by printing marks at selected ones of M rows in N successively printed columns, said M printer elements being arranged side-by-side on one side of a document printing zone at locations to print the M rows of marks, respectively; an anvil disposed opposite said printer elements on the other side of said zone; and means for moving one of said anvils and said set of printer elements relative to the other in a direction from one end of the printing zone to the other end.
  • said set of printer elements is a set of elongated print bars arrayed in parallel, side-by-side relation, each of said print bars extending the length of said printing zone, and wherein said anvil extends across the width of the arrayed bars and is moved at constant speed, during a printing operation, from one end of the print bars to the other end.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Dot-Matrix Printers And Others (AREA)
US388182A 1963-08-08 1964-08-07 Character printing apparatus Expired - Lifetime US3521293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP32360A DE1202547B (de) 1963-08-08 1963-08-08 Anordnung zur Beeinflussung des Druckbildes bei elektronisch gesteuerten Mosaikdruckern

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US3521293A true US3521293A (en) 1970-07-21

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US388182A Expired - Lifetime US3521293A (en) 1963-08-08 1964-08-07 Character printing apparatus

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US (1) US3521293A (enrdf_load_stackoverflow)
BE (1) BE651590A (enrdf_load_stackoverflow)
CH (1) CH444538A (enrdf_load_stackoverflow)
DE (1) DE1202547B (enrdf_load_stackoverflow)
GB (1) GB1050122A (enrdf_load_stackoverflow)
NL (1) NL6408996A (enrdf_load_stackoverflow)
SE (1) SE318142B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228253A1 (enrdf_load_stackoverflow) * 1973-05-02 1974-11-29 Minnesota Mining & Mfg
FR2353397A1 (fr) * 1976-06-01 1977-12-30 Mead Corp Appareil et procede d'impression par jets d'encre
FR2433416A1 (fr) * 1978-08-17 1980-03-14 Mead Corp Imprimante a jets d'encre
EP0150038A3 (en) * 1984-01-24 1985-08-14 Tokyo Electric Co., Ltd. Dot printing device
EP0210121A3 (en) * 1985-07-24 1988-01-13 Mannesmann Aktiengesellschaft Digital microprocessor for representing sloping text (italics), especially in data terminals and in matrix printers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751326C3 (de) * 1977-11-17 1985-05-09 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zum Aufzeichnen von Schrift- oder Bildinformationen
JPS57204983A (en) * 1981-06-10 1982-12-15 Canon Inc Scan type recording device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820956A (en) * 1956-04-03 1958-01-21 Ibm Magnetic printing machine
US3068481A (en) * 1960-07-01 1962-12-11 Xerox Corp Process and apparatus for tesiprinting
US3072046A (en) * 1959-05-27 1963-01-08 Shull Stanley Arthur High-speed printer for computers
US3166752A (en) * 1959-12-04 1965-01-19 Motorola Inc Page printing device utilizing a scanning electrode structure
US3182333A (en) * 1961-12-27 1965-05-04 Nippon Telegraph & Telephone Electrostatic high speed printer
US3330208A (en) * 1966-03-31 1967-07-11 Rca Corp Printer having a selectively variable print font

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820956A (en) * 1956-04-03 1958-01-21 Ibm Magnetic printing machine
US3072046A (en) * 1959-05-27 1963-01-08 Shull Stanley Arthur High-speed printer for computers
US3166752A (en) * 1959-12-04 1965-01-19 Motorola Inc Page printing device utilizing a scanning electrode structure
US3068481A (en) * 1960-07-01 1962-12-11 Xerox Corp Process and apparatus for tesiprinting
US3182333A (en) * 1961-12-27 1965-05-04 Nippon Telegraph & Telephone Electrostatic high speed printer
US3330208A (en) * 1966-03-31 1967-07-11 Rca Corp Printer having a selectively variable print font

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228253A1 (enrdf_load_stackoverflow) * 1973-05-02 1974-11-29 Minnesota Mining & Mfg
US3890623A (en) * 1973-05-02 1975-06-17 Minnesota Mining & Mfg Magnetic document encoder having multiple staggered styli
FR2353397A1 (fr) * 1976-06-01 1977-12-30 Mead Corp Appareil et procede d'impression par jets d'encre
FR2433416A1 (fr) * 1978-08-17 1980-03-14 Mead Corp Imprimante a jets d'encre
EP0150038A3 (en) * 1984-01-24 1985-08-14 Tokyo Electric Co., Ltd. Dot printing device
US4602880A (en) * 1984-01-24 1986-07-29 Tokyo Electric Co., Ltd. Dot printing device
EP0210121A3 (en) * 1985-07-24 1988-01-13 Mannesmann Aktiengesellschaft Digital microprocessor for representing sloping text (italics), especially in data terminals and in matrix printers

Also Published As

Publication number Publication date
CH444538A (de) 1967-09-30
DE1202547B (de) 1965-10-07
GB1050122A (enrdf_load_stackoverflow)
BE651590A (enrdf_load_stackoverflow)
NL6408996A (enrdf_load_stackoverflow) 1965-02-09
SE318142B (enrdf_load_stackoverflow) 1969-12-01

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