EP0358839B1 - Papier d'enregistrement électrosensible - Google Patents

Papier d'enregistrement électrosensible Download PDF

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Publication number
EP0358839B1
EP0358839B1 EP89102994A EP89102994A EP0358839B1 EP 0358839 B1 EP0358839 B1 EP 0358839B1 EP 89102994 A EP89102994 A EP 89102994A EP 89102994 A EP89102994 A EP 89102994A EP 0358839 B1 EP0358839 B1 EP 0358839B1
Authority
EP
European Patent Office
Prior art keywords
layer
zinc
recording paper
recording
paper
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.)
Revoked
Application number
EP89102994A
Other languages
German (de)
English (en)
Other versions
EP0358839A1 (fr
Inventor
Wolfgang Wagner
Georg Schneiderat
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.)
Papierfabrik Schoeller & Hoesch GmbH
Original Assignee
Papierfabrik Schoeller & Hoesch GmbH
Papierfabrik Schoeller & Hoesch GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6356853&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0358839(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Papierfabrik Schoeller & Hoesch GmbH, Papierfabrik Schoeller & Hoesch GmbH filed Critical Papierfabrik Schoeller & Hoesch GmbH
Priority to AT89102994T priority Critical patent/ATE89515T1/de
Publication of EP0358839A1 publication Critical patent/EP0358839A1/fr
Application granted granted Critical
Publication of EP0358839B1 publication Critical patent/EP0358839B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • 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
    • B41M5/20—Duplicating or marking methods; Sheet materials for use therein using electric current

Definitions

  • the invention relates to an electrosensitive registration paper of the type specified in the preamble of claim 1.
  • electrosensitive registration paper is guided with its metallized side over a cylindrical electrode.
  • the counter electrode forms a thin tungsten wire, the tip of which slides on the metallized paper surface.
  • the contact pressure of the counter electrode is between 2,943.10 ⁇ 4 N and 0.0981 N (0.03 and 10 pond) depending on the type of metal layer used. If a direct electrical voltage is applied to the two electrodes, a current flows through the metal layer, which evaporates the metal material in the immediate vicinity of the tungsten tip of the counterelectrode due to the high current density, whereupon the current is interrupted.
  • the base coat of the registration paper appears with good contrast under the metal covering that has evaporated or burned away in this way. If the registration paper is pulled further, the tungsten electrode is energized again and a small amount of metal is burned away again.
  • This registration process requires a very thin layer of metal.
  • zinc is used as the actual registration layer, which, however, naturally adheres poorly to the base lacquer of the paper. Therefore, a pre-seeding layer is first applied to the lacquer layer, which serves as an adhesive base for the zinc layer.
  • the thickness of this metal layer essentially formed by the zinc atoms is of the order of 0.1 ⁇ m.
  • the back of this registration paper is usually covered with a clear protective lacquer.
  • Aluminum has the advantage of adhering directly to the base coat of the registration paper without an additional adhesive layer. In addition to the better contrast compared to the usually black lacquer layer, aluminum has the advantage of a higher corrosion resistance than the known zinc / cadmium layer.
  • the registration paper with a zinc / cadmium layer has a decisive disadvantage in terms of processing and handling.
  • cadmium is a metal of the second subgroup of the periodic table with an atomic weight of 112.41, i.e. a so-called heavy metal, the boiling point of which is 760 ° C. It mainly occurs in the form of its divalent compound as salts, which are extremely toxic when taken orally, leading to vomiting, liver damage and convulsions. When inhaled, the vapors of these salts cause irritation to the mucous membranes and headaches. In addition, these salts are carcinogenic.
  • the object of the invention is to provide an electrosensitive registration paper of the type mentioned in the introduction, which can be written with a lower contact pressure than aluminum-coated registration paper, and which can be produced and handled without the health disadvantages of registration paper which is coated with zinc / cadmium .
  • the invention consists in using silver as the pre-seeding layer for the zinc registration layer, the handling and processing of which is known to be associated with no toxic side effects.
  • the user of the zinc / silver registration paper according to the invention will not see any technical difference from the conventional zinc / cadmium paper, since the sensitivity of the silver substrate, especially the contact force required for perfect registration, is the same as that of the cadmium variant.
  • the registration paper according to the invention is advantageously based on a diagram paper with a thickness of 20 to 80 ⁇ m. A paper thickness of 40 ⁇ m is preferred.
  • a lacquer layer is applied to this paper support, which is advantageously pigmented purely organically. Alternatively, it is provided that the lacquer layer provided with a soot content is additionally pigmented with chromium dioxide (Cr203). This improves the embedding and thus the adhesion of the subsequent zinc vapor deposition.
  • the silver is advantageously vapor-deposited and incompletely evaporated onto this lacquer layer in order to create a pre-germination layer for the external zinc vapor deposition layer.
  • the latter is finally evaporated in such a way that a surface resistance of approximately 5 ohms per unit area arises.
  • the surface resistance is advantageously measured continuously during the vapor deposition with the zinc and the vapor deposition is ended when the surface resistance setpoint is reached.

Landscapes

  • Paper (AREA)
  • Color Printing (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (6)

  1. Papier d'enregistrement électrosensible, en particulier en bande, comportant un papier support sur lequel on dépose une couche de vernis ainsi qu'une couche métallique susceptible de disparaître en brûlant, ces couches étant constituées par une couche d'apprêt mince et par une couche d'enregistrement plus épaisse à base de zinc, caractérisé en ce que la couche d'apprêt est à base d'argent.
  2. Papier d'enregistrement selon la revendication 1, caractérisé en ce que le papier support a une épaisseur comprise entre 20 µm et 80 µm, cette épaisseur étant de 40 µm de préférence.
  3. Papier d'enregistrement selon la revendication 1 ou 2, caractérisé en ce que la couche de vernis comporte une pigmentation de nature organique.
  4. Papier d'enregistrement selon la revendication 1 ou 2, caractérisé en ce que la couche de vernis contient une certaine proportion de noir de fumée et contient en outre une pigmentation à base de dioxyde de chrome.
  5. Papier d'enregistrement selon l'une des revendications 1 à 4, caractérisé en ce que la couche d'enregistrement à base de zinc présente une résistance superficielle d'environ 5 Ohms par unité de surface.
  6. Procédé pour fabriquer le papier d'enregistrement électrosensible selon l'une des revendications 1 à 5, caractérisé en ce que l'on dépose sur le papier support déjà pourvu de la couche de vernis une couche d'argent extrêmement ténue et incomplète, en opérant par vaporisation sous vide, pour y déposer ensuite par vaporisation la couche d'enregistrement à base de zinc, et en ce qu'on règle le processus de métallisation par le zinc vaporisé en fonction de la valeur de la résistance superficielle ainsi obtenue, et surtout en ce qu'on interrompt ce processus lorsqu'on atteint une valeur prédéterminée de la résistance superficielle par unité de surface.
EP89102994A 1988-06-20 1989-02-21 Papier d'enregistrement électrosensible Revoked EP0358839B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102994T ATE89515T1 (de) 1988-06-20 1989-02-21 Elektrosensitives registrierpapier.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3820803 1988-06-20
DE3820803A DE3820803C1 (fr) 1988-06-20 1988-06-20

Publications (2)

Publication Number Publication Date
EP0358839A1 EP0358839A1 (fr) 1990-03-21
EP0358839B1 true EP0358839B1 (fr) 1993-05-19

Family

ID=6356853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102994A Revoked EP0358839B1 (fr) 1988-06-20 1989-02-21 Papier d'enregistrement électrosensible

Country Status (4)

Country Link
EP (1) EP0358839B1 (fr)
AT (1) ATE89515T1 (fr)
DE (2) DE3820803C1 (fr)
ES (1) ES2040912T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880218C (de) * 1951-05-31 1958-08-21 Bosch Gmbh Robert Registrierendes Messgeraet mit metallisiertem Aufzeichnungstraeger
CH323961A (de) * 1953-04-23 1957-08-31 Bosch Gmbh Robert Verfahren zur Herstellung eines Aufzeichnungsträgers für registrierende Messgeräte
US3786518A (en) * 1972-09-22 1974-01-15 Nig Mason Ltd Electrosensitive recording materials
DE2641232C2 (de) * 1976-09-14 1982-10-21 Robert Bosch Gmbh, 7000 Stuttgart Schichtaufbau und Verfahren zu seiner Herstellung
DE2645485C3 (de) * 1976-10-08 1979-10-31 Robert Bosch Gmbh, 7000 Stuttgart Aufzeichnungsträger für Registrierzwecke in elektrosensitiven Registriergeräten
DE3329981A1 (de) * 1983-08-19 1985-03-07 Robert Bosch Gmbh, 7000 Stuttgart Aufzeichnungstraeger fuer registriergeraete

Also Published As

Publication number Publication date
ES2040912T3 (es) 1993-11-01
DE3820803C1 (fr) 1990-02-15
EP0358839A1 (fr) 1990-03-21
ATE89515T1 (de) 1993-06-15
DE58904409D1 (de) 1993-06-24

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