GB978954A - Improvements in or relating to electrolytic recording media - Google Patents

Improvements in or relating to electrolytic recording media

Info

Publication number
GB978954A
GB978954A GB18274/61A GB1827461A GB978954A GB 978954 A GB978954 A GB 978954A GB 18274/61 A GB18274/61 A GB 18274/61A GB 1827461 A GB1827461 A GB 1827461A GB 978954 A GB978954 A GB 978954A
Authority
GB
United Kingdom
Prior art keywords
nitrate
solution
chloride
compound
sodium
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
Application number
GB18274/61A
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.)
Hogan Faximile Corp
Original Assignee
Hogan Faximile 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 Hogan Faximile Corp filed Critical Hogan Faximile Corp
Publication of GB978954A publication Critical patent/GB978954A/en
Expired 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
    • B41M5/20—Duplicating or marking methods; Sheet materials for use therein using electric current

Abstract

An electrolytic recording medium comprises a sheet of paper impregnated with an electrolytically conducting, e.g. aqueous, solution containing a compound of a metal, capable of being oxidized in the presence of electrolytically produced alkalinity, and a polyhydroxyphenolic compound or an aromatic polyamine which, on passage of an electric current between electrodes contacting the paper, reacts with the oxidized metal compound produced to form a distinctive colour. Suitable metal compounds are: manganous, cobaltous or nickelous chloride, chromic or silver nitrate, stannous sulphate, plumbous nitrate, thallous nitrate or sulphate, vanadium tribromide or trichloride. The pH of the solution may range between 2.5 and 8.5. Suitable polyhydroxyphenolic compounds are: gallic acid, catechol, gentisic acid, hydroquinone and pyrogallol. Suitable aromatic polyamines are: o- and p-phenylene diamine, benzidene and their salts, diphenylamine hydrochloride and tolidine hydrochloride. A stabilizer, such as hydrazine, hydroxylamine or a salt thereof, thiourea, an alkyl thiorea and dithiobiuret, may be included in the solution, which may also contain sodium chloride, sodium or potassium nitrate and sodium hydroxide. The electrodes need not be consumed during recording. A preferred solution contains the following substances in parts by weight: manganous chloride 1.3, gallic acid 1.0 and sodium chloride 5.0.
GB18274/61A 1960-05-23 1961-05-19 Improvements in or relating to electrolytic recording media Expired GB978954A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3123260A 1960-05-23 1960-05-23
US50886A US3122488A (en) 1960-05-23 1960-08-22 Electrical recording medium

Publications (1)

Publication Number Publication Date
GB978954A true GB978954A (en) 1965-01-01

Family

ID=26706986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18274/61A Expired GB978954A (en) 1960-05-23 1961-05-19 Improvements in or relating to electrolytic recording media

Country Status (2)

Country Link
US (1) US3122488A (en)
GB (1) GB978954A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341884A1 (en) * 1976-02-19 1977-09-16 Mita Industrial Co Ltd ELECTRICAL RECORDING ELEMENT AND PROCEDURE
FR2484082A1 (en) * 1980-06-05 1981-12-11 Electricite De France Permanent recording of remote information on paper - using facing electrodes, one carrying developer-contg. paper

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399121A (en) * 1964-11-18 1968-08-27 Mallory & Co Inc P R Anodic printing by means of a hydrogen ion sensitive precipitation reaction
JPS53100509A (en) * 1977-02-16 1978-09-02 Kobe Steel Ltd Alarm controlling method
EP1057653A1 (en) * 1999-06-04 2000-12-06 I.P.T. - Impression Printing Technologies B.V. Method of producing color changes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2082735A (en) * 1937-06-01 Finger printing method
US168466A (en) * 1875-10-05 Improvement in solutions for chemical telegraphs
US1343978A (en) * 1916-06-03 1920-06-22 Charles H Little Method of and material for making drawings and other records
US2358839A (en) * 1940-10-25 1944-09-26 Faximile Inc Electrolytic recording
US2430254A (en) * 1942-12-23 1947-11-04 Rca Corp Fibrous sheet material for producing dyes thereon by electrolytic oxidation
US2570096A (en) * 1947-01-09 1951-10-02 Pierce Company Facsimile wet electrolytic recording
US2663656A (en) * 1952-05-15 1953-12-22 Minnesota Mining & Mfg Heat-sensitive copying paper
US2776252A (en) * 1953-04-23 1957-01-01 Faximile Inc Dry electrical recording medium
GB786496A (en) * 1956-12-20 1957-11-20 Muirhead & Co Ltd Improvements in or relating to electrolytic recording media

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2341884A1 (en) * 1976-02-19 1977-09-16 Mita Industrial Co Ltd ELECTRICAL RECORDING ELEMENT AND PROCEDURE
FR2484082A1 (en) * 1980-06-05 1981-12-11 Electricite De France Permanent recording of remote information on paper - using facing electrodes, one carrying developer-contg. paper

Also Published As

Publication number Publication date
US3122488A (en) 1964-02-25

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