US2675332A - Heat sensitive record material - Google Patents

Heat sensitive record material Download PDF

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Publication number
US2675332A
US2675332A US207053A US20705351A US2675332A US 2675332 A US2675332 A US 2675332A US 207053 A US207053 A US 207053A US 20705351 A US20705351 A US 20705351A US 2675332 A US2675332 A US 2675332A
Authority
US
United States
Prior art keywords
record material
heat sensitive
paper
sensitive record
eosin
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
US207053A
Inventor
Barrett K Green
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR 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
Priority to GB22194/49A priority Critical patent/GB658379A/en
Priority to DEN244A priority patent/DE835394C/en
Priority to FR1002824D priority patent/FR1002824A/en
Application filed by NCR Corp filed Critical NCR Corp
Priority to US207053A priority patent/US2675332A/en
Application granted granted Critical
Publication of US2675332A publication Critical patent/US2675332A/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
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/323—Organic colour formers, e.g. leuco dyes
    • B41M5/327—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
    • B41M5/3275—Fluoran compounds
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/29—Printing involving a color-forming phenomenon
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/916—Natural fiber dyeing
    • Y10S8/919—Paper

Definitions

  • This invention relates to heat sensitive record 1 material and more particularly pertains to such material which produces a distinctive color, locally on the application of heat.
  • Paper or other adsorbent or absorbent base web record material is treated, as by impregnation or coating, first with a mild alkali and then with one of the eosin compounds, of the general structure wherein R is one of the group comprising CHa. C2H5 and C3H7.
  • R is one of the group comprising CHa. C2H5 and C3H7.
  • thermosensitive record material comprising a base web treated with a heat-decomposable eosin compound.
  • the preferred record material is made by treating paper pre-coated with particles of a mild alkaline material with a 3 per cent solution, by weight, of the selected eosin compound in acetone. This treatment may be a coating of the paper with the solution or immersion of the paper in the solution. The paper so treated is then dried, leaving the eosin compound in solid particle form, and is ready for use.
  • the color intensifying alkali is applied first to the paper from solution or suspension, and
  • the invention provides an instantaneously reacting record material useful in recording machines in which pressure of the recording member against the record material needs to be kept at a minimum so as not to interfere with its free movement.
  • the recording member is kept heated while making contact with the record material.
  • the color change will occur only at points of heattransfer contact, giving the configuration of the recording surface. Where a recording member traverses the record material while maintaining contact therewith a trace of red color will appear.
  • Record material comprising a base web having an undercoating of dry solid particles of an alkali having a pH value of between 8 and 12.5, and having an adjacent overcoating consisting of solid particles of an eosin compound of the general structure wherein R is of the class consisting of CH3, CzHa and CzHv.

Description

Patented Apr. 13, 1954 UNITED STATES PATENT OFFICE National Cash Register Company,
Dayton,
Ohio, a corporation of Maryland No Drawing.
2 Claims. l I This invention relates to heat sensitive record 1 material and more particularly pertains to such material which produces a distinctive color, locally on the application of heat.
This is a continuation-in-part of my United States patent application, Serial No. 67,257, filed December 24, 1948, now abandoned.
Such record material is useful in machines equipped with heated marking or printing members where the configuration of any such member or its movement is to be recorded. Such a machine is shown in U. S. Patent No. 2,454,966, issued on the application of H. T. Faus.
Paper or other adsorbent or absorbent base web record material is treated, as by impregnation or coating, first with a mild alkali and then with one of the eosin compounds, of the general structure wherein R is one of the group comprising CHa. C2H5 and C3H7. These compounds although intrinsically of yellow-orange color may be applied to the record material base sheet from solution in such small amounts as to give the record material but a slight yellow tint. At 290 Fahrenheit the compound decomposes, producing a strong red color contrasting with the normal yellow tint.
Therefore, it is an object of this invention to provide a heat-sensitive record material comprising a base web treated with a heat-decomposable eosin compound.
The preferred record material is made by treating paper pre-coated with particles of a mild alkaline material with a 3 per cent solution, by weight, of the selected eosin compound in acetone. This treatment may be a coating of the paper with the solution or immersion of the paper in the solution. The paper so treated is then dried, leaving the eosin compound in solid particle form, and is ready for use.
The addition to the paper of a mild alkali of between 8 pH and 12.5 pH, such as sodium carbonate. sodium stearate or sodium phosphate, intensifies the red color at the expense of the stability of the record material in the normal state. The color intensifying alkali is applied first to the paper from solution or suspension, and
Application January 20, 1951, Serial No. 207,053
the paper so treated, dried before application of the eosin solution and exists there in dry, solid particle form.
In this manner premature coloration of the 5 eosin compound is avoided. If the alkali were applied in solution as an overcoating the color would immediately appear.
The invention provides an instantaneously reacting record material useful in recording machines in which pressure of the recording member against the record material needs to be kept at a minimum so as not to interfere with its free movement. The recording member is kept heated while making contact with the record material. When mere impression contact is used the color change will occur only at points of heattransfer contact, giving the configuration of the recording surface. Where a recording member traverses the record material while maintaining contact therewith a trace of red color will appear.
What is claimed is:
1. Record material comprising a base web having an undercoating of dry solid particles of an alkali having a pH value of between 8 and 12.5, and having an adjacent overcoating consisting of solid particles of an eosin compound of the general structure wherein R is of the class consisting of CH3, CzHa and CzHv.
2. The record material of claim 1 in which the base web is paper.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,351,071 Silverman Aug. 31, 1920 1,844,199 Bicknell Feb. 9, 1932 OTHER REFERENCES

Claims (1)

1. RECORD MATERIAL COMPRISING A BASE WEB HAVING AN UNDERCOATING OF DRY SOLID PARTICLES OF AN ALKALI HAVING A PH VALUE OF BETWEEN 8 AND 12.5, AND HAVING AN ADJACENT OVERCOATING CONSISTING OF SOLID PARTICLES ON AN EOSIN COMPOUND OF THE GENERAL FORMULA
US207053A 1948-12-24 1951-01-20 Heat sensitive record material Expired - Lifetime US2675332A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB22194/49A GB658379A (en) 1948-12-24 1949-08-26 Record material for the production of visible records
DEN244A DE835394C (en) 1948-12-24 1949-12-03 Heat sensitive recording material for making visible recordings
FR1002824D FR1002824A (en) 1948-12-24 1949-12-15 Material to produce visible records
US207053A US2675332A (en) 1948-12-24 1951-01-20 Heat sensitive record material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6725748A 1948-12-24 1948-12-24
US207053A US2675332A (en) 1948-12-24 1951-01-20 Heat sensitive record material

Publications (1)

Publication Number Publication Date
US2675332A true US2675332A (en) 1954-04-13

Family

ID=26747665

Family Applications (1)

Application Number Title Priority Date Filing Date
US207053A Expired - Lifetime US2675332A (en) 1948-12-24 1951-01-20 Heat sensitive record material

Country Status (4)

Country Link
US (1) US2675332A (en)
DE (1) DE835394C (en)
FR (1) FR1002824A (en)
GB (1) GB658379A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219818A (en) * 1962-10-05 1965-11-23 Du Pont Thermographic recording process
US3243784A (en) * 1960-09-29 1966-03-29 Litton Systems Inc Microwave process and apparatus
US4020232A (en) * 1974-05-17 1977-04-26 Mitsubishi Paper Mills, Ltd. Heat-sensitive recording sheets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787325A (en) * 1970-11-16 1974-01-22 Ncr Alkylamino spiro {8 12-h{8 1{9 benzopyran {8 3,2f{9 {14 quinoline-12,1{40 phthalide

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351071A (en) * 1918-06-07 1920-08-31 Silverman Alexander Recording device
US1844199A (en) * 1928-08-30 1932-02-09 Rca Corp Pyro-recording paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1351071A (en) * 1918-06-07 1920-08-31 Silverman Alexander Recording device
US1844199A (en) * 1928-08-30 1932-02-09 Rca Corp Pyro-recording paper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243784A (en) * 1960-09-29 1966-03-29 Litton Systems Inc Microwave process and apparatus
US3219818A (en) * 1962-10-05 1965-11-23 Du Pont Thermographic recording process
US4020232A (en) * 1974-05-17 1977-04-26 Mitsubishi Paper Mills, Ltd. Heat-sensitive recording sheets

Also Published As

Publication number Publication date
GB658379A (en) 1951-10-10
DE835394C (en) 1952-03-31
FR1002824A (en) 1952-03-11

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