GB2260813A - Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time - Google Patents

Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time Download PDF

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Publication number
GB2260813A
GB2260813A GB9122752A GB9122752A GB2260813A GB 2260813 A GB2260813 A GB 2260813A GB 9122752 A GB9122752 A GB 9122752A GB 9122752 A GB9122752 A GB 9122752A GB 2260813 A GB2260813 A GB 2260813A
Authority
GB
United Kingdom
Prior art keywords
cryogenic
zero temperatures
predetermined period
labels
detect
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.)
Withdrawn
Application number
GB9122752A
Other versions
GB9122752D0 (en
Inventor
Raymond * Williams Terry
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9122752A priority Critical patent/GB2260813A/en
Publication of GB9122752D0 publication Critical patent/GB9122752D0/en
Publication of GB2260813A publication Critical patent/GB2260813A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

A coloured label changes colour when exposed to sub-zero temperatures for a predetermined period. Different initial colours indicate different periods. The colour of the label is chosen to indicate the life of a frozen food product and a change of colour indicates that it has reached the end of its life. Examples include yellow, red and green labels changing to black after 1, 2 and 3 months at sub zero temperatures respectively.

Description

DESCRIPTION CRYOGENIC LABELS TO DETECT AN EXPOSURE TO SUB ZERO TEMPERATURES FOR A DETERMINED PERIOD OF TIME.
FOOD AND PRODUCE WHICH ARE TO BE FROZEN OR ARE ALREADY FROZEN HAVE A LIMITED LIFE SPAN.
BY IDENTIFYING THE LIFE TIME PERIOD WITH A COLOURED LABEL WHICH CHANGES COLOUR WHEN EXPOSED TO A SUB ZERO TEMPERATURE FOR A SET TIME PERIOD THAN THE FOOD AND PRODUCE LIFE SPAN CAN BE MONITORED FOR INSTANCE A YELLOW COLOURED CRYOGENIC LABEL HAS BEEN PRODUCED TO CHANGE TO THE COLOUR BLACK AFTER A 1 MONTH EXPOSURE PERIOD.
A RED COLOURED CRYOGENIC LEBEL HAS BEEN PRODUCED TO CHANGE TO THE COLOUR BLACK AFTER A 3 MONTH EXPOSURE PERIOD.
A GREEN COLOURED CRYOGENIC LABEL HAS BEEN PRODUCED TO CHANGE TO THE COLOUR BLACK AFTER A 6 MONTH EXPOSURE PERIOD.
A ORANGE COLOURED CRYOGENIC LABEL HAS BEEN PRODUCED TO CHANGE TO THE COLOUR BLACK AFTER A 12 MONTH EXPOSURE PERIOD.

Claims (1)

1 CRYOGENIC LABELS TO DETECT AN EXPOSURE TO SUB ZERO TEMPERATURES FOR A DETERMINED PERIOD OF TIME.
BY IDENTIFYING THE LIFE TIME PERIOD WITH A COLOURED LABEL WHICH CHANGES COLOUR WHEN EXPOSED TO A SUB ZERO TEMPERATURE FOR A SET TIME PERIOD THAN THE FOOD AND PRODUCE LIFE SPAN CAN BE MONITORED.
GB9122752A 1991-10-26 1991-10-26 Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time Withdrawn GB2260813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9122752A GB2260813A (en) 1991-10-26 1991-10-26 Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9122752A GB2260813A (en) 1991-10-26 1991-10-26 Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time

Publications (2)

Publication Number Publication Date
GB9122752D0 GB9122752D0 (en) 1991-12-11
GB2260813A true GB2260813A (en) 1993-04-28

Family

ID=10703577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9122752A Withdrawn GB2260813A (en) 1991-10-26 1991-10-26 Cryogenic labels to detect an exposure to sub zero temperatures for a predetermined period of time

Country Status (1)

Country Link
GB (1) GB2260813A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1481100A (en) * 1973-09-24 1977-07-27 Minnesota Mining & Mfg Indicating device
WO1981000303A1 (en) * 1979-07-13 1981-02-05 T Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product,indicator for applying said process and utilization of said process
WO1985003775A1 (en) * 1984-02-21 1985-08-29 Controlled Chemicals Incorporated Accumulated thermal exposure responder and method of use
WO1987003367A1 (en) * 1985-12-02 1987-06-04 Allied Corporation Photoactivatable leuco base time-temperature indicator
EP0231499A1 (en) * 1986-01-02 1987-08-12 Allied Corporation Activatable time-temperature indicator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1481100A (en) * 1973-09-24 1977-07-27 Minnesota Mining & Mfg Indicating device
WO1981000303A1 (en) * 1979-07-13 1981-02-05 T Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product,indicator for applying said process and utilization of said process
WO1985003775A1 (en) * 1984-02-21 1985-08-29 Controlled Chemicals Incorporated Accumulated thermal exposure responder and method of use
WO1987003367A1 (en) * 1985-12-02 1987-06-04 Allied Corporation Photoactivatable leuco base time-temperature indicator
EP0231499A1 (en) * 1986-01-02 1987-08-12 Allied Corporation Activatable time-temperature indicator

Also Published As

Publication number Publication date
GB9122752D0 (en) 1991-12-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)