FR2449873A1 - Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye - Google Patents

Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye

Info

Publication number
FR2449873A1
FR2449873A1 FR7901411A FR7901411A FR2449873A1 FR 2449873 A1 FR2449873 A1 FR 2449873A1 FR 7901411 A FR7901411 A FR 7901411A FR 7901411 A FR7901411 A FR 7901411A FR 2449873 A1 FR2449873 A1 FR 2449873A1
Authority
FR
France
Prior art keywords
liq
temp
fragile
dye
contg
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.)
Granted
Application number
FR7901411A
Other languages
French (fr)
Other versions
FR2449873B1 (en
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 FR7901411A priority Critical patent/FR2449873A1/en
Publication of FR2449873A1 publication Critical patent/FR2449873A1/en
Application granted granted Critical
Publication of FR2449873B1 publication Critical patent/FR2449873B1/fr
Granted 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
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening

Landscapes

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

Abstract

A device for detecting a rise in temp. after an initial freezing treatment comprises a fragile container of glass or plastic (rigid PVC) contg. a dyed liq. which will burst the container upon being frozen and therefore will spread irreversibly if the temp. subsequently rises above the m.pt. of the liq. Used esp. for checking if the temp. of deep frozen food etc. has risen above about-15 degrees C prior to being required for use, by using an aq. soln. contg. a freezing pt. depressant (such as iodine) and a dye (such as eosine). Instead of a fragile tube or capsule, the 'container' may be porous sponge from which the dyed liq. can drain freely when melted. Detectors with a vol, of about 1 ml may be used in individual packages or laid in a freezer compartment to signal a temporary rise in temp. even if the temp. is subsequently again reduced to below -15 degrees C.
FR7901411A 1979-01-19 1979-01-19 Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye Granted FR2449873A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7901411A FR2449873A1 (en) 1979-01-19 1979-01-19 Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7901411A FR2449873A1 (en) 1979-01-19 1979-01-19 Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye

Publications (2)

Publication Number Publication Date
FR2449873A1 true FR2449873A1 (en) 1980-09-19
FR2449873B1 FR2449873B1 (en) 1982-01-22

Family

ID=9220985

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901411A Granted FR2449873A1 (en) 1979-01-19 1979-01-19 Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye

Country Status (1)

Country Link
FR (1) FR2449873A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156912A1 (en) * 1983-09-05 1985-10-09 MITSUI TOATSU CHEMICALS, Inc. Temperature supervision and display unit
FR2670007A1 (en) * 1990-12-04 1992-06-05 Bialkiewicz Serge Device for marking a break in the cold chain, relating to a frozen or deep-frozen product

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2016042A1 (en) * 1968-08-21 1970-04-30 Knight Wegenstein Ag TEMPERATURE CONTROL INDICATOR FOR FROZEN PRODUCTS
DE1601924A1 (en) * 1967-12-23 1970-05-06 Studiengesellschaft Kohle Mbh Device for displaying improper storage of frozen goods
CH585396A5 (en) * 1974-10-02 1977-02-28 Hughes Joseph Edward Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state
DE2547638A1 (en) * 1975-10-24 1977-04-28 Neuwoehner Kurt Frozen food storage temp. rise indicator - with absorbent paper or frozen salt solution acting on soluble dye for visible display of freshness
FR2361635A1 (en) * 1976-08-13 1978-03-10 Thomson Csf DEVICE CAPABLE OF DETECTING IN A SUSTAINABLE WAY A PASSENGER HEATING OF A FROZEN PRODUCT

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1601924A1 (en) * 1967-12-23 1970-05-06 Studiengesellschaft Kohle Mbh Device for displaying improper storage of frozen goods
FR2016042A1 (en) * 1968-08-21 1970-04-30 Knight Wegenstein Ag TEMPERATURE CONTROL INDICATOR FOR FROZEN PRODUCTS
CH585396A5 (en) * 1974-10-02 1977-02-28 Hughes Joseph Edward Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state
DE2547638A1 (en) * 1975-10-24 1977-04-28 Neuwoehner Kurt Frozen food storage temp. rise indicator - with absorbent paper or frozen salt solution acting on soluble dye for visible display of freshness
FR2361635A1 (en) * 1976-08-13 1978-03-10 Thomson Csf DEVICE CAPABLE OF DETECTING IN A SUSTAINABLE WAY A PASSENGER HEATING OF A FROZEN PRODUCT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0156912A1 (en) * 1983-09-05 1985-10-09 MITSUI TOATSU CHEMICALS, Inc. Temperature supervision and display unit
EP0156912A4 (en) * 1983-09-05 1989-03-23 Mitsui Toatsu Chemicals Temperature supervision and display unit.
FR2670007A1 (en) * 1990-12-04 1992-06-05 Bialkiewicz Serge Device for marking a break in the cold chain, relating to a frozen or deep-frozen product

Also Published As

Publication number Publication date
FR2449873B1 (en) 1982-01-22

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Legal Events

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