US2833677A - Recording paper for spark recorders - Google Patents

Recording paper for spark recorders Download PDF

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Publication number
US2833677A
US2833677A US51371655A US2833677A US 2833677 A US2833677 A US 2833677A US 51371655 A US51371655 A US 51371655A US 2833677 A US2833677 A US 2833677A
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US
United States
Prior art keywords
layer
paper
spark
recording paper
metal
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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
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English (en)
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Publication of US2833677A publication Critical patent/US2833677A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • B41M5/245—Electroerosion or spark recording
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31703—Next to cellulosic
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • Y10T428/31982—Wood or paper

Definitions

  • the conductive backing acts as counter electrode for the marking electrode and the current is supplied, if desired but not necessarily, by providing a metal support, for example a drum at the place of marking.
  • the metal layer fulfills no electrical function but acts only as combustion material for the sparks. Therefore it does not need to have high conductivity and it may consist of discrete metal particles, the particle size and density of distribution corresponding to the solvent power of the record.
  • the advantage of the use of the metal. layer as a mark creating medium consists in the high heat absorption coefficient, the local overheating at only momentary heating and thereby making possible a sharp and quick marking with substantially weaker spark energy.
  • the insulating intermediate layer avoids the disadvantages of known record paper regarding action between the metal layer and the counter electrode.
  • the sparks traverse the space between the spark or marking electrode and the counter electrode always along the shortest path, that is vertically to the paper and not wandering laterally since their point of contact imparted on the counter electrode remains conductive.
  • the spark heat in the metal particles in the spark path is scattered in the insulating layer and the paper backing layer.
  • the metal coated record paper of this invention differs in that the marking is facilitated by the absence of moisture in the spark developing layer whereby the capacity for sorting and use of the record paper is improved.
  • the new record paper differs from known metallized condenser paper with a filling varnish layer for the uneven ness in the paper backing which cannot be present in condenser paper, apart from the dilferent purpose to be served.
  • paper instead of paper, other sheet material for example plastics, fabrics, etc. may be used to which the necessary electric conductivity has been imparted by impregnation or addition of. the material.
  • the paper backing may be made by known paper making methods.
  • finely divided carbon for example soot or lampblack.
  • finely divided metals and preferably oxidation preventing additions such as high atent O Patented May 6, 1958 molecular carbohydrates may be added to the paper mass and if desired also dark colored dyes or pigments.
  • the insulating intermediate layer is preferably made from a viscous solution of a cellulose derivative, and artificial materials, for example acetylcellulose of the linear polymer type.
  • the varnish may have dyes or pigments embodied therein in order to increase the optical contrast against the metal layer at the marking track.
  • the metal layer may be formed in various known Ways, for example spraying by compressed air (the Schoop method), thermal vaporizing, cathonic spraying and thermal decomposition, for example of carbonyls, acetylene acetones, etc.
  • the metal used may be light colored as zinc, aluminum and nickel, deposited on a dark colored base or binding. It is also possible to use a colored metal such as copper, bronze, etc. with a complementary colored backing, for example with a greenish or bluish color.
  • the record paper of Fig. 1 consists of a paper backing layer 1 made of equal parts by weight of paper pulp and soot along with conventional sizing agents as known in the art. it is coated on one side with a colorless layer 2; of acetylcellulose which serves as insulator and to smooth out the paper irregularities.
  • a colorless layer 2 of acetylcellulose which serves as insulator and to smooth out the paper irregularities.
  • the paper backing 1' also consists of soot containing pulp.
  • the intermediate layer 2 consists of polystyrol varnish containing a white pigment such as titanium oxide.
  • the record producing metal layer 3 consists of copper deposited by decomposition of copper acetic acetone.
  • the record paper of this invention is used in natural air dried condition with the metal layer moving opposite the spark electrode of the printing device.
  • the marking track is produced by a sharp edge burning oil or vaporization of the metal layer lying in the path of the sparks and is easily perceptible owing to contrast between the exposed paper backing and the undisturbed metal layer.
  • the air resistance of the metal layer is unlimited but if desired the printing can be fixed by spraying thcreover a varnish layer or other fixing medium.
  • a multi-layer recording paper for use in spark recording by printing intelligence by electrically burning away a metal coating comprising a basic paper layer which is conductive, a metallic top layer having a low electric conductance across its plane, and a uniform and continuous dielectric layer interposed between the two layers and throughout electrically separating said basic layer and said top layer.

Landscapes

  • Heat Sensitive Colour Forming Recording (AREA)
  • Duplication Or Marking (AREA)
US51371655 1954-06-09 1955-06-07 Recording paper for spark recorders Expired - Lifetime US2833677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1125811X 1954-06-09

Publications (1)

Publication Number Publication Date
US2833677A true US2833677A (en) 1958-05-06

Family

ID=7725073

Family Applications (1)

Application Number Title Priority Date Filing Date
US51371655 Expired - Lifetime US2833677A (en) 1954-06-09 1955-06-07 Recording paper for spark recorders

Country Status (3)

Country Link
US (1) US2833677A (enrdf_load_stackoverflow)
FR (1) FR1125811A (enrdf_load_stackoverflow)
LU (1) LU33625A1 (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935369A (en) * 1956-08-23 1960-05-03 Little Inc A Record sustaining structures and methods for manufacturing same
US3113888A (en) * 1961-03-03 1963-12-10 Nat Starch Chem Corp Direct method for metalization of cast-coated paper
US3299433A (en) * 1964-10-21 1967-01-17 Reis electrosbnsitive recording
US3483074A (en) * 1965-06-08 1969-12-09 Grace W R & Co Matrix material for molding duplicate printing plates
US3657721A (en) * 1969-09-11 1972-04-18 Bosch Gmbh Robert Recording tape with partially oxidized aluminum film
US3831179A (en) * 1972-02-01 1974-08-20 Bosch Gmbh Robert Electrographic tape recording medium
US3861952A (en) * 1971-01-30 1975-01-21 Sony Corp Recording medium for a spark burning recorder
US4024546A (en) * 1971-03-09 1977-05-17 Robert Bosch G.M.B.H. Metal-coated carrier for recordings and process for determining the oxygen-attached aluminum contents in the coating
FR2406525A1 (fr) * 1977-10-22 1979-05-18 Bosch Gmbh Robert Support d'inscription pour appareils enregistreurs et procede pour sa fabrication
US4319255A (en) * 1979-12-14 1982-03-09 International Business Machines Corporation Tinted metallized recording medium
US4419392A (en) * 1981-08-21 1983-12-06 International Business Machines Corporation Process for producing compact lacquer layers for record carriers
US4483902A (en) * 1980-02-27 1984-11-20 International Business Machines Corporation Record carrier

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2310946A (en) * 1939-04-07 1943-02-16 William G H Finch Facsimile recording paper
US2471607A (en) * 1947-01-09 1949-05-31 Finch Telecommunications Inc Facsimile recording papers
US2687361A (en) * 1949-04-04 1954-08-24 Bosch Gmbh Robert Metal coated recording medium for recording instruments
US2726168A (en) * 1951-07-11 1955-12-06 Western Union Telegraph Co Electrosensitive recording and duplicating blank
US2726179A (en) * 1952-01-07 1955-12-06 Bosch Gmbh Robert Recording tapes having a metal layer applied by vapour deposition

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2310946A (en) * 1939-04-07 1943-02-16 William G H Finch Facsimile recording paper
US2471607A (en) * 1947-01-09 1949-05-31 Finch Telecommunications Inc Facsimile recording papers
US2687361A (en) * 1949-04-04 1954-08-24 Bosch Gmbh Robert Metal coated recording medium for recording instruments
US2726168A (en) * 1951-07-11 1955-12-06 Western Union Telegraph Co Electrosensitive recording and duplicating blank
US2726179A (en) * 1952-01-07 1955-12-06 Bosch Gmbh Robert Recording tapes having a metal layer applied by vapour deposition

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935369A (en) * 1956-08-23 1960-05-03 Little Inc A Record sustaining structures and methods for manufacturing same
US3113888A (en) * 1961-03-03 1963-12-10 Nat Starch Chem Corp Direct method for metalization of cast-coated paper
US3299433A (en) * 1964-10-21 1967-01-17 Reis electrosbnsitive recording
US3483074A (en) * 1965-06-08 1969-12-09 Grace W R & Co Matrix material for molding duplicate printing plates
US3657721A (en) * 1969-09-11 1972-04-18 Bosch Gmbh Robert Recording tape with partially oxidized aluminum film
US3861952A (en) * 1971-01-30 1975-01-21 Sony Corp Recording medium for a spark burning recorder
US4024546A (en) * 1971-03-09 1977-05-17 Robert Bosch G.M.B.H. Metal-coated carrier for recordings and process for determining the oxygen-attached aluminum contents in the coating
US3831179A (en) * 1972-02-01 1974-08-20 Bosch Gmbh Robert Electrographic tape recording medium
FR2406525A1 (fr) * 1977-10-22 1979-05-18 Bosch Gmbh Robert Support d'inscription pour appareils enregistreurs et procede pour sa fabrication
US4319255A (en) * 1979-12-14 1982-03-09 International Business Machines Corporation Tinted metallized recording medium
US4483902A (en) * 1980-02-27 1984-11-20 International Business Machines Corporation Record carrier
US4419392A (en) * 1981-08-21 1983-12-06 International Business Machines Corporation Process for producing compact lacquer layers for record carriers

Also Published As

Publication number Publication date
LU33625A1 (enrdf_load_stackoverflow)
FR1125811A (fr) 1956-11-08

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