US3877038A - Electrode apparatus for a printer for electrostatic matrix printing - Google Patents

Electrode apparatus for a printer for electrostatic matrix printing Download PDF

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Publication number
US3877038A
US3877038A US410977A US41097773A US3877038A US 3877038 A US3877038 A US 3877038A US 410977 A US410977 A US 410977A US 41097773 A US41097773 A US 41097773A US 3877038 A US3877038 A US 3877038A
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US
United States
Prior art keywords
image
printer
conductor tracks
openings
electrode
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
US410977A
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English (en)
Inventor
Gerhard Krekow
Klaus Witter
Jurgen Schramm
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
Original Assignee
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
Application granted granted Critical
Publication of US3877038A publication Critical patent/US3877038A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J2/415—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 by passing charged particles through a hole or a slit

Definitions

  • ABSTRACT A printer for electrostatic matrix printing, comprising a counter electrode, a space for a record carrier, a ceramic body with openings, and an electrode system consisting of conductor tracks between which spark gaps are formed which are situated in the prolongation ,of the openings.
  • the invention relates to a printer for electrostatic matrix printing, comprising a space for a record carrier, the said space being situated between a counter electrode and an electrode system which consists of image electrodes which are insulated with respect to each other, a ceramic body being arranged on the side of the electrode system which faces the said space. the said ceramic body being provided with openings extending perpendicular to the record carrier.
  • Electrode arrangements of this kind serve for the formation of electrostatic charge image points.
  • the prior art describes an electrode arrangement in which an electrode system is incorporated comprising electrodes which are arranged one above the other and which are insulated from each other, at least the electrode facing the space for the record carrier being provided with a bore extending perpendicular to the record carrier such that an air gap is produced between the electrodes.
  • the invention has for its object to simplify the construction of such electrode arrangements.
  • the electrode system is formed by conductor tracks, a narrow gap being present between the end face of a conductor track and the end face of a neighbouring conductor track, the said gap constituting a spark gap, each spark gap being situated in an envelope defined by a projection of the openings.
  • FIG. 1 is a perspective view of the mechanical construction of an electrode system for a printer according to the invention
  • FIG. 2 is a cross-sectional view with an electrical circuit diagram.
  • a large number of conductor tracks 3 and 4 are baked into two ceramic plates 1 and 2, for example, of A1 0 by the silk-screen printing technique.
  • the two plates 1 and 2 are mounted such that between the end faces 5 and 6 of oppositely arranged conductor tracks an airgap 7 of approximately 30 to 50 micrometers exists.
  • a single ceramic plate can alternatively be used on which a gap is, for example, ground between the corresponding conductor tracks. Electrodes which are oppositely arranged in pairs, for example 3' and 4', constitute a spark gap 8.
  • the two ceramic plates 1 and 2 are arranged on a ceramic plate 9 having a thickness of a few tenths of a millimetre (attachment not shown), the said plate 9 being provided with openings 10, the arrangement being such that each time a spark gap 8 is situated in the projection of an opening 10.
  • the complete electrode system is situated at a distance of a few tenths of a millimeter (air gap L) from a record carrier 11 having a dielectric layer which itself is arranged on a plate-like counter electrode 12 (see FIG. 2).
  • one (3) of the two conductor tracks 3, 4 constituting a spark gap 8 receives a high voltage pulse U of approximately 1 to 1.5 kV, while the other conductor track (4) is grounded. As a result, a spark is produced between these conductor tracks.
  • a pointlike charge image is produced on the record carrier 11 by applying a voltage pulse U,- (500 to 1000 volts of re versed polarity) to the counter electrode 12.
  • a printer for electrostatic matrix printing on an associated generally planar record carrier comprising: first and second image electrodes, a counter electrode in spaced relation to said image electrodes said image electrodes being electrically insulated with respect to each other. a ceramic body disposed intermediate'said image electrodes in spaced relation to said counter electrode to permit movement of the record carrier therebetween, said body being provided with openings each having an axis extending perpendicular to the re: cord carrier, said image electrodes each comprising a plurality of conductor' tracks extending away from a narrow elongated gap each of said conductor tracks having an end face abutting said gap, each of said conductor tracks in one image electrode being disposed proximate to a conductor track in the other image electrode to define a spark gap, each of said spark gaps being disposed within an envelope defined by a projection of one of said openings.
  • each of said openings is cylindrical.
  • Patent No. 3 ,877 038 UNITED STATES PATENT OFFICE CERTIFICATE 6F -1 - RETIN Dated April 8, 1975 Inventor-(s) Gerhard Krekow? Klaus Witter, Jurgen Schramm It is certified that error appears in the above-identified patent hat said Letters Patentare hereby corrected as shown below:

Landscapes

  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Dot-Matrix Printers And Others (AREA)
US410977A 1972-11-02 1973-10-29 Electrode apparatus for a printer for electrostatic matrix printing Expired - Lifetime US3877038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2253625A DE2253625C3 (de) 1972-11-02 1972-11-02 Elektrodenanordnung für den elektrostatischen Matrixdruck

Publications (1)

Publication Number Publication Date
US3877038A true US3877038A (en) 1975-04-08

Family

ID=5860644

Family Applications (1)

Application Number Title Priority Date Filing Date
US410977A Expired - Lifetime US3877038A (en) 1972-11-02 1973-10-29 Electrode apparatus for a printer for electrostatic matrix printing

Country Status (8)

Country Link
US (1) US3877038A (enrdf_load_stackoverflow)
JP (1) JPS4996735A (enrdf_load_stackoverflow)
CA (1) CA1002108A (enrdf_load_stackoverflow)
DE (1) DE2253625C3 (enrdf_load_stackoverflow)
FR (1) FR2205850A5 (enrdf_load_stackoverflow)
GB (1) GB1390007A (enrdf_load_stackoverflow)
IT (1) IT994475B (enrdf_load_stackoverflow)
SE (1) SE383848B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979760A (en) * 1974-03-06 1976-09-07 Hitachi, Ltd. Electrostatic recording apparatus with auxiliary electrodes
US4155093A (en) * 1977-08-12 1979-05-15 Dennison Manufacturing Company Method and apparatus for generating charged particles
US5153435A (en) * 1991-05-09 1992-10-06 Xerox Corporation Planar scorotron device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524389A1 (fr) * 1982-04-02 1983-10-07 Cit Alcatel Tete d'impression electrostatique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035474A (en) * 1933-02-21 1936-03-31 Donaid L Hay Spark recording system
US3015263A (en) * 1961-02-16 1962-01-02 Ibm High speed marking apparatus
US3187669A (en) * 1962-12-24 1965-06-08 Ibm High speed spark discharge print device
US3673598A (en) * 1969-07-10 1972-06-27 Agfa Gevaert Ag Apparatus for the electrographic recording of charge images

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035474A (en) * 1933-02-21 1936-03-31 Donaid L Hay Spark recording system
US3015263A (en) * 1961-02-16 1962-01-02 Ibm High speed marking apparatus
US3187669A (en) * 1962-12-24 1965-06-08 Ibm High speed spark discharge print device
US3673598A (en) * 1969-07-10 1972-06-27 Agfa Gevaert Ag Apparatus for the electrographic recording of charge images

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979760A (en) * 1974-03-06 1976-09-07 Hitachi, Ltd. Electrostatic recording apparatus with auxiliary electrodes
US4155093A (en) * 1977-08-12 1979-05-15 Dennison Manufacturing Company Method and apparatus for generating charged particles
US5153435A (en) * 1991-05-09 1992-10-06 Xerox Corporation Planar scorotron device

Also Published As

Publication number Publication date
DE2253625A1 (de) 1974-05-16
JPS4996735A (enrdf_load_stackoverflow) 1974-09-12
GB1390007A (en) 1975-04-09
DE2253625C3 (de) 1979-11-08
IT994475B (it) 1975-10-20
DE2253625B2 (de) 1979-03-15
FR2205850A5 (enrdf_load_stackoverflow) 1974-05-31
SE383848B (sv) 1976-04-05
CA1002108A (en) 1976-12-21

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