GB2194645B - Positive - acting thermographic materials - Google Patents

Positive - acting thermographic materials

Info

Publication number
GB2194645B
GB2194645B GB8719289A GB8719289A GB2194645B GB 2194645 B GB2194645 B GB 2194645B GB 8719289 A GB8719289 A GB 8719289A GB 8719289 A GB8719289 A GB 8719289A GB 2194645 B GB2194645 B GB 2194645B
Authority
GB
United Kingdom
Prior art keywords
acting
positive
thermographic materials
thermographic
materials
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 - Fee Related
Application number
GB8719289A
Other versions
GB8719289D0 (en
GB2194645A (en
Inventor
David Robert Whitcomb
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB8719289D0 publication Critical patent/GB8719289D0/en
Publication of GB2194645A publication Critical patent/GB2194645A/en
Application granted granted Critical
Publication of GB2194645B publication Critical patent/GB2194645B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
GB8719289A 1986-08-14 1987-08-14 Positive - acting thermographic materials Expired - Fee Related GB2194645B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US89676386A 1986-08-14 1986-08-14

Publications (3)

Publication Number Publication Date
GB8719289D0 GB8719289D0 (en) 1987-09-23
GB2194645A GB2194645A (en) 1988-03-09
GB2194645B true GB2194645B (en) 1990-02-14

Family

ID=25406783

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8719289A Expired - Fee Related GB2194645B (en) 1986-08-14 1987-08-14 Positive - acting thermographic materials

Country Status (3)

Country Link
JP (1) JPS6348385A (en)
DE (1) DE3722731A1 (en)
GB (1) GB2194645B (en)

Also Published As

Publication number Publication date
JPS6348385A (en) 1988-03-01
GB8719289D0 (en) 1987-09-23
DE3722731A1 (en) 1988-02-18
GB2194645A (en) 1988-03-09

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990814