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US2687361A - Metal coated recording medium for recording instruments - Google Patents

Metal coated recording medium for recording instruments Download PDF

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Publication number
US2687361A
US2687361A US195373A US19537350A US2687361A US 2687361 A US2687361 A US 2687361A US 195373 A US195373 A US 195373A US 19537350 A US19537350 A US 19537350A US 2687361 A US2687361 A US 2687361A
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US
United States
Prior art keywords
recording
metal
instruments
metal coated
coating
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
US195373A
Inventor
Traub Eberhardt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to US195373A priority Critical patent/US2687361A/en
Application granted granted Critical
Publication of US2687361A publication Critical patent/US2687361A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/02—Details not particular to receiver or transmitter
    • H04L13/06—Tape or page guiding or feeding devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/24—Apparatus or circuits at the receiving end
    • H04L15/28—Code reproducing apparatus
    • H04L15/30—Writing recorders

Definitions

  • the invention relates to metal coated recording mediums, such as dielectric recording strips to which, for instance, the metal coating can have been applied by evaporation. Recording strips of this type are preferably used in recording instruments recording readings of measuring instruments by having an electrical stylus burn a trace into the metallized coating of the recording strips.
  • the object of the invention is to increase the life of the metal coating and to prevent its premature deterioration. Premature failure of the metal coating has, for instance, been noticed on dielectric strips with an evaporated zinc coating, which were found to be unsatisfactory due to disintegration of the metal.
  • the present invention therefore provides that the to be metallized surface of the recording strip or both its surfaces be coated with nonhygroscopic, chemically neutral material.
  • Such a recording strip can, for instance, be made of paper, one surface of which has been varnished and then been coated with metal applied by evaporation.
  • the metallized coating of one winding will be in contact with the non-metallized back of the next Winding and will, thus, be exposed to corrosive action. It will, therefore, be found expedient to varnish both sides of the paper strip prior to metallizing its top surface. It is, of course, also possible to replace the paper strips With strips made Wholly of chemically neutrai and nearly nonhygroscopic material such as polystyrene.
  • the object of the invention is illustrated by way of example in the accompanying diagrammatic drawing which shows a sectional View of a paper strip I having a varnish coating 2 applied to both its surfaces.
  • the cadmium coating 3 has been applied by evaporation to one of the varnish coatings 2.
  • the drawing does not correspond to actual conditions.
  • the thickness of the paper is 15-20 a the thickness of the varnish coating 0.8-1 a and the thickness of the metal coating 0.05-01 e.
  • a strip for electrical recording comprising, in combination, a strip consisting of hygroscopic material, said strip having two faces arranged 0pposite to each other; a layer consisting of nonhygroscopic material and being superposed to one of said faces of said strip, said non-hygroscopic layer having a thickness of between .8 and 1 u; and a cadmium layer superposed to said nonhygroscopic layer, said cadmium layer having a thickness of between .05 and .1 a.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Description

E. TRAUB 2,687,361
Aug. 24, 1954 METAL COATED RECORDING MEDIUM FOR RECORDING INSTRUMENTS Filed Nov. 13, 1950 'unllnlluallllllllllllllllllll L .r11 u l, uanunrlunu 'laIl11111111llllllilnunuunuulluullua /NVE/VTOR Eberhczfdz Waub Patented Aug. 24, 1954 METAL COATED RECORDING MEDIUM FOR RECORDING INSTRUMENTS Eberhardt Traub, Stuttgart, Germany, assignor to Robert Bosch G. m. b. H., Stuttgart, Germany Application November 13, 1950, Serial No. 195,373
1 claim. 1
The invention relates to metal coated recording mediums, such as dielectric recording strips to which, for instance, the metal coating can have been applied by evaporation. Recording strips of this type are preferably used in recording instruments recording readings of measuring instruments by having an electrical stylus burn a trace into the metallized coating of the recording strips.
The object of the invention is to increase the life of the metal coating and to prevent its premature deterioration. Premature failure of the metal coating has, for instance, been noticed on dielectric strips with an evaporated zinc coating, which were found to be unsatisfactory due to disintegration of the metal.
As research has shown that the disintegration of the'metal is primarily due to chemical action caused by water absorbed by the hygroscopic paper to which the metal is applied, the present invention therefore provides that the to be metallized surface of the recording strip or both its surfaces be coated with nonhygroscopic, chemically neutral material.
Such a recording strip can, for instance, be made of paper, one surface of which has been varnished and then been coated with metal applied by evaporation. When storing such recording strips in rolls the metallized coating of one winding will be in contact with the non-metallized back of the next Winding and will, thus, be exposed to corrosive action. It will, therefore, be found expedient to varnish both sides of the paper strip prior to metallizing its top surface. it is, of course, also possible to replace the paper strips With strips made Wholly of chemically neutrai and nearly nonhygroscopic material such as polystyrene.
It has further been found that the life of the metal coatings also depends on the selection of the coating metal. Cadmium applied by evaporation has been found to form the most stable metal coating. Cadmium coated recording mediums have retained their serviceableness for many years.
The object of the invention is illustrated by way of example in the accompanying diagrammatic drawing which shows a sectional View of a paper strip I having a varnish coating 2 applied to both its surfaces. The cadmium coating 3 has been applied by evaporation to one of the varnish coatings 2. The drawing does not correspond to actual conditions. Actually the thickness of the paper is 15-20 a the thickness of the varnish coating 0.8-1 a and the thickness of the metal coating 0.05-01 e.
What I claim is:
A strip for electrical recording comprising, in combination, a strip consisting of hygroscopic material, said strip having two faces arranged 0pposite to each other; a layer consisting of nonhygroscopic material and being superposed to one of said faces of said strip, said non-hygroscopic layer having a thickness of between .8 and 1 u; and a cadmium layer superposed to said nonhygroscopic layer, said cadmium layer having a thickness of between .05 and .1 a.
References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 2,274,444 Freed Feb. 24, 1942 2,382,432 McManus et al. Aug. 14, 1945
US195373A 1949-04-04 1950-11-13 Metal coated recording medium for recording instruments Expired - Lifetime US2687361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US195373A US2687361A (en) 1949-04-04 1950-11-13 Metal coated recording medium for recording instruments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE284476X 1949-04-04
US195373A US2687361A (en) 1949-04-04 1950-11-13 Metal coated recording medium for recording instruments

Publications (1)

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US2687361A true US2687361A (en) 1954-08-24

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808345A (en) * 1953-04-23 1957-10-01 Robert Bosch G M B H Fa Recording tape
US2833677A (en) * 1954-06-09 1958-05-06 Recording paper for spark recorders
US2935369A (en) * 1956-08-23 1960-05-03 Little Inc A Record sustaining structures and methods for manufacturing same
US2971862A (en) * 1957-04-26 1961-02-14 Nat Res Corp Vapor deposition method and apparatus
US3113888A (en) * 1961-03-03 1963-12-10 Nat Starch Chem Corp Direct method for metalization of cast-coated paper
US3411948A (en) * 1964-04-08 1968-11-19 Hewlett Packard Co Electrosensitive recording medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274444A (en) * 1940-05-04 1942-02-24 Freed Simon Lighting fixture
US2382432A (en) * 1940-08-02 1945-08-14 Crown Cork & Seal Co Method and apparatus for depositing vaporized metal coatings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274444A (en) * 1940-05-04 1942-02-24 Freed Simon Lighting fixture
US2382432A (en) * 1940-08-02 1945-08-14 Crown Cork & Seal Co Method and apparatus for depositing vaporized metal coatings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2808345A (en) * 1953-04-23 1957-10-01 Robert Bosch G M B H Fa Recording tape
US2833677A (en) * 1954-06-09 1958-05-06 Recording paper for spark recorders
US2935369A (en) * 1956-08-23 1960-05-03 Little Inc A Record sustaining structures and methods for manufacturing same
US2971862A (en) * 1957-04-26 1961-02-14 Nat Res Corp Vapor deposition method and apparatus
US3113888A (en) * 1961-03-03 1963-12-10 Nat Starch Chem Corp Direct method for metalization of cast-coated paper
US3411948A (en) * 1964-04-08 1968-11-19 Hewlett Packard Co Electrosensitive recording medium

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