DE19511290A1 - Indicator of thawing of deep-frozen foodstuffs - Google Patents

Indicator of thawing of deep-frozen foodstuffs

Info

Publication number
DE19511290A1
DE19511290A1 DE1995111290 DE19511290A DE19511290A1 DE 19511290 A1 DE19511290 A1 DE 19511290A1 DE 1995111290 DE1995111290 DE 1995111290 DE 19511290 A DE19511290 A DE 19511290A DE 19511290 A1 DE19511290 A1 DE 19511290A1
Authority
DE
Germany
Prior art keywords
indicator
dye
thawing
instead
deep
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.)
Ceased
Application number
DE1995111290
Other languages
German (de)
Inventor
Peter Aust
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 DE1995111290 priority Critical patent/DE19511290A1/en
Publication of DE19511290A1 publication Critical patent/DE19511290A1/en
Priority to DE29519624U priority patent/DE29519624U1/en
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • 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)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

Frozen material, partic. food, is protected by an indicator in a tube, bag, or other container, comprising a cellulose strip which is coloured by a dye on thawing, the colouration persisting on re-freezing. One or several chemical substances or crystals can be used in place of a simple dye, undergoing an irreversible colour change on temp. rise.

Description

Stand der TechnikState of the art

Tiefkühlgut, insbesondere Lebensmittel, wird nach seiner Herstellung vielmals Verladen, Umgepackt, Transportiert und Zwischengelagert.Frozen goods, especially food, are made according to his Manufacturing many times loading, repackaged, transported and Interim storage.

Dabei ist nicht auszuschließen, daß unbeabsichtigt die "Kühlkette" unterbrochen wird und das Kühlgut An- oder Auftaut. Ein Wiedereinfrieren solchen Gutes ist nicht nur gesetzlich verboten, sondern kann bei Lebensmitteln ernsthafte Gefahren für den Verbraucher mit sich bringen.It cannot be ruled out that the "Cold chain" is interrupted and the refrigerated goods thawing or thawing. Refreezing such good is not only legal prohibited, but can pose serious risks to food bring the consumer with it.

Die EU Verordnung 92/2 schreibt deshalb europaweit eine Lückenlose Dokumentationspflicht für Temperatur geführte Transporte vor.The EU regulation 92/2 therefore writes Europe-wide a complete documentation requirement for temperature-controlled Transports before.

Eine Nationale Umsetzung dieser Verordnung scheitert unter anderem an den fehlenden technischen Einrichtungen bei Spediteuren und Lageristen.National implementation of this regulation fails among other things, the lack of technical facilities with forwarders and warehouse staff.

Im Moment gibt es nur die Möglichkeit, mittels Elektronischer Aufzeichnungsverfahren, die Umgebungstemperatur ganzer Container oder LKW Ladungen zu erfassen.At the moment there is only the possibility of using electronic Recording process, the ambient temperature of entire containers or truck loads.

Dies birgt die Gefahr der Manipulation in sich, wird zum Beispiel eine Palette Gefriergut auf der Laderampe vergessen und Stunden später in den LKW geladen, so zeichnet der im LKW installierte Computer dieses Versäumnis nicht auf. Auch hat der Verbraucher keine Möglichkeit Versäumnisse, zum Beispiel beim Einzelhändler, zu erkennen. Anders bei dem hier angemeldeten Indikator.This carries the risk of manipulation, for example forget a pallet of frozen food on the loading ramp and loaded into the truck hours later, that's how it draws in the truck installed computers not this failure. Also, the consumer has no way of neglecting for example at the retailer. Not so with the indicator registered here.

Durch den extrem günstigen Herstellungspreis von nur wenigen Pfennigen, kann jede Einzelpackung Gefriergut mit diesem Nachweis ausgestattet werden.Due to the extremely low manufacturing price of only few pennies, each single pack of frozen food can be done with this Proof.

Ein Verfärben des Indikators zeigt dem Verbraucher, wie auch dem Lebensmittelkontrolleur an daß zu irgendeinem Zeitpunkt seit der Herstellung die Kühlkette unterbrochen wurde. A discolouration of the indicator shows the consumer as well as the food controller that at some point since the cold chain was manufactured was interrupted.  

Auf eine selbstklebende Trägerfolie wird ein Tropfen eines Farbstoffes gebracht.A drop of one is placed on a self-adhesive carrier film Brought dye.

Für den Einsatz im Lebensmittelbereich zum Beispiel mit Lebensmittelfarbe eingefärbtes Trinkwasser.For use in the food sector, for example Food coloring colored drinking water.

Nach dem Tiefgefrieren des Farbstoffes auf der Trägerfolie wird ein weißer Zellstoffstreifen auf den gefrorenen Tropfen aufgeklebt und der Indikator mit einer Klarsichtfolie überzogen.After freezing the dye on the carrier film there will be a white strip of cellulose on the frozen drops glued on and the indicator with a transparent film overdrawn.

Übersteigt nun die Umgebungstemperatur den Taupunkt des Indikators, so schmilzt der Tropfen und der Farbstoff durchdringt den Zellstoffstreifen. Der Streifen verfärbt sich und behält diese Farbe auch nach dem Wiedereinfrieren bei.Now the ambient temperature exceeds the dew point of the indicator, the drop melts and the Dye penetrates the cellulose strip. The streak changes color and retains this color re-freezing.

Durch die Zugabe von gefrierpunktsenkenden Stoffen z. B. Alkohol, zu dem Farbstoff kann eine individuell einstellbare Anzeigetemperatur gewählt werden.By adding freezing point lowering substances e.g. B. alcohol, to the dye can be an individual adjustable display temperature can be selected.

Claims (5)

1. Zu schützen ist das Verfahren, daß sich nach dem Auftauen eines Farbstoffes ein Zellstoffstreifen verfärbt, der diese Verfärbung auch nach dem Wieder­ einfrieren beibehält.1. The procedure to be protected is that after Thaw a dye into a strip of cellulose discolored, this discoloration even after re- freeze maintains. 2. statt einem einfachen Farbstoff, eine oder mehrere chemische Substanzen verwendet werden, die nach Erreichen einer bestimmten Temperatur, einen Irreversiblen Farbumschlag bewirken.2. Instead of a simple dye, one or more chemical substances are used after reaching a certain temperature, one Irreversible color change. 3. statt einem einfachen Farbstoff, Kristalle verwendet werden, die nach Erreichen einer bestimmten Temperatur, einen Irreversiblen farbumschlag bewirken.3. Instead of a simple dye, crystals are used after reaching a certain temperature, cause an irreversible color change. 4. statt weißem Zellstoff ein anderer Stoff zur Anzeige dient, oder auf dieses Anzeigemittel ganz verzichtet wird.4. Instead of white cellulose, another substance Display serves, or on this display means is completely dispensed with. 5. zur Aufnahme des Indikators ein Prüfröhrchen, Beutel oder anderes Behältnis dient.5. a test tube to record the indicator, Bag or other container.
DE1995111290 1995-03-28 1995-03-28 Indicator of thawing of deep-frozen foodstuffs Ceased DE19511290A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1995111290 DE19511290A1 (en) 1995-03-28 1995-03-28 Indicator of thawing of deep-frozen foodstuffs
DE29519624U DE29519624U1 (en) 1995-03-28 1995-12-12 Indicator for detecting the interruption of cold chains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995111290 DE19511290A1 (en) 1995-03-28 1995-03-28 Indicator of thawing of deep-frozen foodstuffs

Publications (1)

Publication Number Publication Date
DE19511290A1 true DE19511290A1 (en) 1995-10-12

Family

ID=7757926

Family Applications (2)

Application Number Title Priority Date Filing Date
DE1995111290 Ceased DE19511290A1 (en) 1995-03-28 1995-03-28 Indicator of thawing of deep-frozen foodstuffs
DE29519624U Expired - Lifetime DE29519624U1 (en) 1995-03-28 1995-12-12 Indicator for detecting the interruption of cold chains

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE29519624U Expired - Lifetime DE29519624U1 (en) 1995-03-28 1995-12-12 Indicator for detecting the interruption of cold chains

Country Status (1)

Country Link
DE (2) DE19511290A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20000317U1 (en) * 2000-01-08 2001-06-07 Trender Lutz Device for permanent, permanent detection and display of an overshoot / undershoot of a predetermined temperature

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2815571B1 (en) * 2000-10-20 2003-07-04 Sequoias MARKING DEVICE CAPABLE OF SHOWING A BINDING AND ITS MANUFACTURING METHOD

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416627A1 (en) * 1973-04-12 1974-11-07 Oskar Edwin Dipl I Stuerzinger Temp. indicator for deeply frozen preserves - recording even temporary thawing (e.g. during transport) by colour reaction between two colourless substances
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
DE2431667B2 (en) * 1973-07-02 1979-12-06 Ashley-Butler, Inc., New York, N.Y. (V.St.A.)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416627A1 (en) * 1973-04-12 1974-11-07 Oskar Edwin Dipl I Stuerzinger Temp. indicator for deeply frozen preserves - recording even temporary thawing (e.g. during transport) by colour reaction between two colourless substances
DE2431667B2 (en) * 1973-07-02 1979-12-06 Ashley-Butler, Inc., New York, N.Y. (V.St.A.)
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20000317U1 (en) * 2000-01-08 2001-06-07 Trender Lutz Device for permanent, permanent detection and display of an overshoot / undershoot of a predetermined temperature

Also Published As

Publication number Publication date
DE29519624U1 (en) 1996-03-28

Similar Documents

Publication Publication Date Title
US7571695B2 (en) Freeze indicators, flexible freeze indicators and manufacturing methods
US3974317A (en) Thermometric compositions including inert additives and products
US2971852A (en) Temperature telltale
DK1228366T3 (en) Full historical time-temperature indicator system
US11821798B2 (en) Time and/or temperature sensitive devices and methods of use thereof
WO2007056752B1 (en) Combination freeze indicators
WO2020097154A1 (en) Printable irreversible minimum temperature indicator
US4038873A (en) Temperature monitor and indicator
US6425343B1 (en) Shape memory alloy thermal exposure monitor
Steele et al. On excitation of biological substances
US20110116529A1 (en) Label for indicating the history of high-temperture exposure
US4248089A (en) Temperature measuring
US3751382A (en) Enzymatic indicator and method of making it
DE19511290A1 (en) Indicator of thawing of deep-frozen foodstuffs
US2716065A (en) Telltale for frozen food packages
CN101198850A (en) Method and device for detecting a rise in temperature in a cooled container
US2798855A (en) Sterilization indicator
US20050104035A1 (en) Intelligent label for informing consumers of product quality criteria
Willocx et al. A preliminary survey into the temperature conditions and residence time distribution of minimally processed MAP vegetables in Belgian retail display cabinets
US3828612A (en) Method and means for indicating temperature variations in a product, preferably a food product
Clark et al. Magnetic resonance imaging of persimmon fruit (Diospyros kaki) during storage at low temperature and under modified atmosphere
US1944050A (en) Means and method for displaying substances
DE69901180T2 (en) TEMPERATURE MONITOR FOR FROZEN PRODUCTS
GB2365843A (en) Label for indicating opening date of package
DE2312466A1 (en) PROCEDURE FOR DETERMINING THE OCCURRENCE OF MICROBIOLOGICAL ACTIVITIES IN PACKED SOLID OR LIQUID MATERIALS WITHOUT OPENING THE PACKAGING

Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licenses declared
8131 Rejection