US3786745A - Durable registration template for electrostatic printers - Google Patents

Durable registration template for electrostatic printers Download PDF

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Publication number
US3786745A
US3786745A US00315643A US3786745DA US3786745A US 3786745 A US3786745 A US 3786745A US 00315643 A US00315643 A US 00315643A US 3786745D A US3786745D A US 3786745DA US 3786745 A US3786745 A US 3786745A
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US
United States
Prior art keywords
template
recesses
insulating
substrate
printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00315643A
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English (en)
Inventor
H Hinz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
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US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3786745A publication Critical patent/US3786745A/en
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Classifications

    • 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
    • B41J2/41—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 for electrostatic printing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/32—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
    • G03G15/321—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by charge transfer onto the recording material in accordance with the image
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Definitions

  • ABSTRACT A electrostatic template for use in a printing operation.
  • the template comprises a synthetic resin raster having discrete raster positions surrounded by metal to form the template.
  • a synchronization track is provided on the template adjacent the raster positions and coincident with the movement of the template carrier.
  • the present invention relates to a durable registration template for a printer operating according to electrostatic electrography and having a raster-like divided, chargeable synthetic-resin and metal surface.
  • printers called electrostatic printers for short, may be designed for matrix printing in which the printing characters, in accordance with the prescription for the chosen matrix writing, are formed from a number of, for example 7 X 9 63 possible printing points con- .tained in a rectangular field.
  • Known electrostatic matrix printers produce the charge image on a special registration carrier, for example, paper which is rendered conducting and which isunilaterally coated with a layer of highly insulating synthetic resin.
  • the charging device consists, typically, of a row of juxtaposed, generally round registration electrodes representing a limited registration dimension.
  • the registration carrier is drawn between the row of electrodes, which is situated perpendicular to the synthetic resin layer registeringthe charge image, and a counter-electrode entirely covering this row of electrodes. Intimate contact exists between the paper substrate and thecounter electrode, whilst the registration electrodes are some microns remote from the synthetic resin layer.
  • This transport of the registration'carrier, at an angle of 90 with respect to the row of electrodes results in the second registration dimension of variable length.
  • a synchronizing device coupled to the registration carrier supplies a trigger pulse at each new row of printing points, said trigger pulse producing a highvoltage pulse at the revealant registration electrodes during a brief period in accordance with the information to be printed.
  • the gas discharge thus produced in the air gap between the driven registration electrodes and the registration carrier causes the area of the registration carrier which is situated below the registration electrode, to be charged.
  • the accompanying impact ionization providing the charge to the carrier is transported in the air space and is not only limited to the cylindrical spaces considered-to be an extension to the registration electrodes and having the same diameter, which spaces are located between the said electrodes and the synthetic resin surface registering the charge image. It rather expands in the direction of the layer, such that v the charged areas are larger than the front faces of the electrodes.
  • the size of the charged area, its shape and the position of its centre with respect to the axis of the registration electrode is also influenced by various other influences and effects which are essentially determined by the configuration of the charging device, the nature of the durable registration carrier, the air humidity and the value of the high voltage. This obviously has an adverse effect on the quality of the printed characters, which therefore deviate from the prescribed matrix writing as regards shape, size and distance of the printing points.
  • the durable registration template according to the invention eliminates these drawbacks, i.e., it guarantees an exactly defined matrix print for a sufficient number of printing runs.
  • the synthetic resin raster, surrounded by metal is provided in the dimension of the direction of the template movement, with a synchronization track by means of which voltage pulses can be applied to charging electrodes which are arranged in at least one row opposite from the synthetic, resin raster positions.
  • the invention is not restricted to a band-shaped, generally endless construction, i.e., a loop, having dimensions conforming to the printer and the width of the printing text.
  • the construction of the durable registration template with its advantageous properties can also be readily used on other constructions, for example, rollers.
  • the novel durable registration template is particularly suitable for electrostatic printers having a constant and a variable output of information in an adequate number of copies.
  • FIG. 1 is a plan view of a portion of a band-like template
  • FIG. 2 is a cross-sectional view of the portion shown in FIG. 1,
  • FIGS. 3 to 6 are cross-sectional views of a single raster point in various operating conditions during a printing cycle
  • FIG. 7 is a cross-sectional view of another embodiment of the registration template.
  • the durable registration template comprises a carrier band 1, a conducting homogeneous substrate of high mechanical strength, for example, metal, having a smooth surface.
  • a field of appropriate width of, for example', round raster points 3 is recessed uniformly at a depth of approximately 10 microns.
  • the diameter and distance of the raster points corresponds to that of the printing points of the chosen matrix writing.
  • These recesses are filled with a highly insulating, homogeneous material having a smooth surface, for example, synthetic resin or lacquer, having a thickness of approximately 10 microns.
  • the dielectric fillings 3a registering the charge image do not necessarily need to be flush with the surface.
  • FIG. 7 is a cross-sectional view through the band.
  • an homogeneous, highly insulating synthetic resin or lacquer layer 10 having a uniform thickness of approximately 10 microns and a smooth surface
  • a conducting, homogeneous coating 11 of uniform thickness for example, a metal of some microns thickness and having a smooth surface.
  • the raster points, for example, 12 are recessed the full depth of the layer 11.
  • the carrier band 9 and the coating 11 are connected in a conducting manner via a metallic connection 13, for example, at the edge.
  • the charge image can be registered only by the surface of the dielectric layer which is dependent upon the shape of the raster points 12.
  • the charging device may have, for example, the construction and the lay-out as in known electrostatic printers which print on synthetic resin-paperregistration carriers.
  • this track can be arranged on the edges, or on the upper and lower sides of the band.
  • FIGS. 3 to 6 illustrate by way of an exposed raster point of the band-shaped durable registration template, the process steps of a printing cycle passing the stations of an electrostatic printer, constructed and operating in known manner.
  • FIG. 3 shows the raster point 3 from the instant of charging triggered by the synchronization device (charging electrode in the centre of the raster point filling), a registration electrode 5, (a round pin electrode) and the counter electrode 6, (which is connected to earth) is provided.
  • the surface of the dielectric filling 3a is charged by the ignited gas discharge with the aid of a brief high voltage pulse U on the registration electrode.
  • the surface and the shape of the electrode are to be in agreement with those of the dielectric only as far as this is in conformity with the surface density in the entire range of the filling required for making the latent charge image visible.
  • the charge image (FIG. 4) of the raster point (filling 3a) is covered, in accordance with the surface-charge density, with an adequately thick, equivalent layer 4 of charged, pulverized dye, as is shown in FIGS. 1 and 5.
  • This layer has the shape of the dielectric version 3a.
  • FIG. 6 shows the raster point 3 after the printing of the powder image 7 has been effected by means of a known transfer device, on a normal registration carrier 8, for example, paper, in the electrical field by the active electrostatic forces.
  • the printing image 7 on the normal registration carrier again corresponds in shape only with the shape of the powder image 4, and hence with the shape of the filling 3 carrying the charge image.
  • the charge image is not lost when transferred and can be used during its service life for an adequate number of printing processes. For printing new information, the charge images must in any case be erased.
  • a template for use in an electrostatic printing device in which a number of printing runs may be obtained from one electrostatic image by repeatedly attracting dye to said template in accordance with the charge image of a printing character and transferring said dye to form matrix prints on a registration carrier, said template comprising a band containing a conducting metallic substrate, said band having edges thereon, and having an upper and a lower surface, one of said surfaces containing said sustrate, said substrate having a plurality of raster points for printing a character, said raster points being formed by recesses disposed in said substrate, each of said recesses having a bottom portion with an insulating surface which may be charged to form part of said image, said dye being attracted only to the charged insulating surfaces to thereby from said image, and synchronization track means disposed upon the template adjacent to said raster positions.
  • said band comprises two conducting layers with an insulating layer disposed therebetween, one of said conducting layers being said metallic substrate, and said insulating surface in said bottom portion of said recesses being formed by said insulating layer abutting the recesses in said substrate, said template further comprising a conducting member connected between said conducting layers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
US00315643A 1970-09-05 1972-12-15 Durable registration template for electrostatic printers Expired - Lifetime US3786745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702044180 DE2044180A1 (de) 1970-09-05 1970-09-05 Daueraufzeichnungsschablone für elektrostatische Drucker

Publications (1)

Publication Number Publication Date
US3786745A true US3786745A (en) 1974-01-22

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ID=5781746

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Application Number Title Priority Date Filing Date
US00315643A Expired - Lifetime US3786745A (en) 1970-09-05 1972-12-15 Durable registration template for electrostatic printers

Country Status (6)

Country Link
US (1) US3786745A (enrdf_load_stackoverflow)
JP (1) JPS5139494B1 (enrdf_load_stackoverflow)
CA (1) CA946039A (enrdf_load_stackoverflow)
DE (1) DE2044180A1 (enrdf_load_stackoverflow)
FR (1) FR2107312A5 (enrdf_load_stackoverflow)
GB (1) GB1296650A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419015A1 (de) * 1973-04-19 1975-01-16 Texas Instruments Inc Elektrostatisches anzeigesystem
US3979757A (en) * 1973-04-19 1976-09-07 Kilby Jack S Electrostatic display system with toner applied to head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120806A (en) * 1957-04-24 1964-02-11 Ibm Magnetic image plate
US3225883A (en) * 1962-11-13 1965-12-28 Waldemar A Ayres Word writing machine producing closed-up printing in response to simultaneous actuation of keys
US3245341A (en) * 1963-04-15 1966-04-12 Electrostatic Printing Corp Powder image forming device
US3279367A (en) * 1964-06-25 1966-10-18 Ncr Co Impelled powdered ink printing device and process using intaglio means
US3289209A (en) * 1962-03-22 1966-11-29 Xerox Corp Electrostatic matrix printer
US3299809A (en) * 1964-11-05 1967-01-24 Continental Can Co Electrostatic printing process for use with printing plate having plural levels
US3368482A (en) * 1966-08-08 1968-02-13 Owens Illinois Inc Intaglio printing from stencil wrapped about cylinder
US3545374A (en) * 1968-04-26 1970-12-08 Massachusetts Inst Technology High-speed printer employing a gas discharge matrix

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120806A (en) * 1957-04-24 1964-02-11 Ibm Magnetic image plate
US3289209A (en) * 1962-03-22 1966-11-29 Xerox Corp Electrostatic matrix printer
US3225883A (en) * 1962-11-13 1965-12-28 Waldemar A Ayres Word writing machine producing closed-up printing in response to simultaneous actuation of keys
US3245341A (en) * 1963-04-15 1966-04-12 Electrostatic Printing Corp Powder image forming device
US3279367A (en) * 1964-06-25 1966-10-18 Ncr Co Impelled powdered ink printing device and process using intaglio means
US3299809A (en) * 1964-11-05 1967-01-24 Continental Can Co Electrostatic printing process for use with printing plate having plural levels
US3368482A (en) * 1966-08-08 1968-02-13 Owens Illinois Inc Intaglio printing from stencil wrapped about cylinder
US3545374A (en) * 1968-04-26 1970-12-08 Massachusetts Inst Technology High-speed printer employing a gas discharge matrix

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419015A1 (de) * 1973-04-19 1975-01-16 Texas Instruments Inc Elektrostatisches anzeigesystem
US3979757A (en) * 1973-04-19 1976-09-07 Kilby Jack S Electrostatic display system with toner applied to head

Also Published As

Publication number Publication date
JPS5139494B1 (enrdf_load_stackoverflow) 1976-10-28
FR2107312A5 (enrdf_load_stackoverflow) 1972-05-05
DE2044180A1 (de) 1972-03-16
GB1296650A (enrdf_load_stackoverflow) 1972-11-15
CA946039A (en) 1974-04-23

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