WO1989000680A1 - Dispositif indicateur de la position d'un fluide qui se repand dans un corps - Google Patents

Dispositif indicateur de la position d'un fluide qui se repand dans un corps Download PDF

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Publication number
WO1989000680A1
WO1989000680A1 PCT/CH1988/000119 CH8800119W WO8900680A1 WO 1989000680 A1 WO1989000680 A1 WO 1989000680A1 CH 8800119 W CH8800119 W CH 8800119W WO 8900680 A1 WO8900680 A1 WO 8900680A1
Authority
WO
WIPO (PCT)
Prior art keywords
color
liquid
diffusion
design
spreading
Prior art date
Application number
PCT/CH1988/000119
Other languages
German (de)
English (en)
Inventor
Thomas Allmendinger
Original Assignee
Thomas Allmendinger
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 Thomas Allmendinger filed Critical Thomas Allmendinger
Publication of WO1989000680A1 publication Critical patent/WO1989000680A1/fr

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
    • 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

Definitions

  • thermometer where the temperature is known to be displayed with the level of a column of mercury or another liquid column. If a colorless liquid such as alcohol are used in a thermometer instead of mercury, so it is common for these ben understoodfär- for illustrating the display with a soluble dye '.
  • colorless liquid such as alcohol are used in a thermometer instead of mercury, so it is common for these ben understoodfär- for illustrating the display with a soluble dye '.
  • coloring of the spreading liquid is obvious wherever this liquid itself is colorless and where the display should be easily visible to the viewer. This method can also be used when the liquid is not in
  • Another possibility for generating a color effect for displaying the position of a particular in an absorbent body vordiffun ⁇ exploding liquid is to trigger by means of this liquid in a suitably prepared diffuser body ver ⁇ with a color change Thematic chemical reaction. If the diffusing liquid is water, then - as in US Pat. No. 2,552,477 - the phenomenon can be exploited that various transition metal salts, in particular cobalt halides, change color due to water absorption. As suggested in US Pat. No. 2,762,711, certain organic compounds can also be used in this way.
  • an acid / base reaction or a redox process can also be used to produce a color change, for example in that the diffusing liquid is a liquid acid or a base and in that an acid / base indicator such as litmus is provided in the diffusion body which shows a color change when this acid or base is pre-diffused.
  • US Pat. No. 4,432,656 proposes the possibility of providing a solid acid in the initial region of a diffusion body, which is dissolved in the pre-diffusing water and carried to an end region provided with an acid / base indicator, where the color change then occurs he follows.
  • the display methods described can have various disadvantages or restrictions.
  • a device for indicating the position of a liquid which is spreading in a body, which device manages without chemical color reactions or without dyes dissolved in this liquid, and thus the above-mentioned problems and disadvantages in a simple manner deals.
  • This is achieved in that the body in which the liquid spreads is not or only slightly transparent in the dry state and covers a design, and that this body becomes transparent when wetted by the liquid and this design is therefore visible can be.
  • the paper can additionally be impregnated with one or more substances which control the diffusion but are not responsible for the (color) display.
  • the diffusion is actually a capillary diffusion.
  • 'diffusion' On the basis of which physical or chemical processes the spreading of the liquid, which is referred to here as 'diffusion', takes place, is not of importance for the functioning of the proposed display principle. It is also not decisive whether the liquid itself is colorless or if at all it has an intrinsic color, even if the proposed device is primarily for otherwise poorly visible, ie colorless or only slightly colored
  • Liquids In particular, water or an aqueous solution can be used as the liquid.
  • a simple color or a color sample as design and, for example, white flow paper as diffusion body
  • a colorless liquid there is an envelope of white according to this color or color sample.
  • the design can be printed on a plastic body serving as a base, preferably on a plastic film. If, on the other hand, you want to achieve a color change from one color to another, the body covering the design, in this case the flowing paper, must itself contain a color or a color pattern different from the covered design or hue, so that the Wetting a color change by overlaying your own color with the color of the surface. If, for example, the base is red and the diffusion body is yellow, a color change from yellow to orange occurs when a colorless liquid diffuses.
  • This own color or pattern can be produced by appropriately coloring or printing on the (diffusion) body. However, it can also be produced according to claim 6 by applying a correspondingly colored or printed transparent film to the body, preferably a plastic film. This means a simplification in the implementation of the device if the (diffusion) body is so absorbent that it has to be protected with a cover film anyway in order to keep the ambient moisture away and if this cover film also serves as a carrier for its own color or your own color sample can be consulted.
  • a device for displaying the position of a liquid spreading in a body in the manner described is of particular value in the case of time / temperature indicators for chilled or frozen products, which are based on the principle that a liquid front which diffuses with temperature indicates the quality or storage condition.
  • time / temperature indicators for chilled or frozen products which are based on the principle that a liquid front which diffuses with temperature indicates the quality or storage condition.
  • Various embodiments of such indicators can be found, for example, in US Pat. 3'954'OH or No. 4,432,656.
  • a design is preferably printed on a plastic body serving as a base 4, for example on a plastic film, and covered by a (diffusion) body 1.
  • An absorbent material preferably filter paper or chromatography paper, can be used as the (diffusion) body 1. It can be white, colored or printed and can also be impregnated with additional substances essential for controlling the diffusion.
  • the design present on the base 4 can be a uniform color, but can also be divided into different (color) areas 4a, 4b and 4c or it can represent any pattern. For the practical implementation of this device, it is usually necessary to glue or seal the (diffusion) body 1 on the base 4.
  • the (diffusion) body 1 As soon as a liquid 2, preferably water or an aqueous solution, the (diffusion) body 1 to form a diffusion front 3 of one Flows through the side, the body becomes transparent in the area la wetted by the liquid and makes the underlying design visible, while the design remains invisible in the still dry part 1b. This shows position 3 of the liquid front.
  • a liquid preferably water or an aqueous solution
  • the arrangement can additionally be covered with a transparent film 5, which can be provided or printed with its own color, with different color areas 5a and 5b or with a color pattern. For practical implementation it is usually necessary to glue or seal the cover film 5 onto the (diffusion) body 1.
  • the suitable color of the (diffusion) body 1 or the cover film 5 is superimposed on the wetting by the liquid 2 in the region la by the color or the design of the base 4, so that a color change occurs when the colors are selected appropriately .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

Dans un dispositif indicateur de la position (3) d'un fluide (2) qui se répand dans un corps (1) (de diffusion), on met à profit le fait que divers matériaux, notamment du papier, deviennent transparents lorsqu'ils sont humidifiés avec des liquides incolores ou faiblement colorés. Le corps (1) de diffusion recouvre un support (4) coloré ou pourvu d'un dessin qui devient visible dans la région (1a) lorsque le corps de diffusion (1) est humidifié avec le liquide (2). Le corps de diffusion (1) peut être lui aussi coloré ou pourvu d'un dessin coloré, de sorte que lorsqu'il est humidifié la superposition de sa couleur propre avec la couleur du support entraîne un changement de couleur. Cette couleur du corps de diffusion (1) peut être appliquée sur une pellicule transparente (5) qui recouvre le tout, au lieu d'être appliquée directement sur le corps de diffusion. Le dispositif convient notamment pour simplifier l'indication des couleurs dans des indicateurs de temps température fonctionnant de produits congelés ou surgelés fonctionnant sur la base du principe de la diffusion de liquides.
PCT/CH1988/000119 1987-07-09 1988-07-05 Dispositif indicateur de la position d'un fluide qui se repand dans un corps WO1989000680A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2584/87-6 1987-07-09
CH258487 1987-07-09

Publications (1)

Publication Number Publication Date
WO1989000680A1 true WO1989000680A1 (fr) 1989-01-26

Family

ID=4237079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1988/000119 WO1989000680A1 (fr) 1987-07-09 1988-07-05 Dispositif indicateur de la position d'un fluide qui se repand dans un corps

Country Status (1)

Country Link
WO (1) WO1989000680A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011341A1 (fr) * 1995-09-19 1997-03-27 Nicola Massi Dispositif de detection et de decompte des ruptures de la chaine du froid dans des produits surgeles ou congeles
WO1999024799A1 (fr) * 1997-11-11 1999-05-20 Intec S.R.L. Dispositif permettant de detecter, d'evaluer et de signaler la decongelation de denrees alimentaires congelees et surgelees
FR2789486A1 (fr) * 1999-02-05 2000-08-11 Forterie Bruno De Dispositif pour la detection et la mesure quantitative de l'exposition d'un objet a une temperature predeterminee
WO2001029525A1 (fr) * 1999-10-20 2001-04-26 Galdino Barbieri Dispositif pour la detection et la mesure quantitative de l'exposition d'un objet a une temperature et une duree predeterminees
WO2002000552A2 (fr) * 2000-06-23 2002-01-03 Innova/Pure Water, Inc. Indicateur de duree de vie d'un filtre a eau
JP2003533706A (ja) * 2000-05-15 2003-11-11 スリーエム イノベイティブ プロパティズ カンパニー 超小形構造の時間依存型インジケータ
CN103578350A (zh) * 2013-06-13 2014-02-12 安徽理工大学 一种化学智能标签组件及其制备方法
JP2018537694A (ja) * 2015-11-17 2018-12-20 ユーダブリュアイ テクノロジー リミテッド マイクロ流体経過時間インジケータ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382700A (en) * 1980-10-14 1983-05-10 Youngren Fred R Shelf life indicator
US4408557A (en) * 1979-06-18 1983-10-11 Micro-Circuits Co., Inc. Timer and storage condition indicator
US4432656A (en) * 1979-07-13 1984-02-21 Thomas Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product, indicator for applying said process and utilization of said process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408557A (en) * 1979-06-18 1983-10-11 Micro-Circuits Co., Inc. Timer and storage condition indicator
US4432656A (en) * 1979-07-13 1984-02-21 Thomas Allmendinger Process for monitoring the history of temperature versus time of deep-frozen product, indicator for applying said process and utilization of said process
US4382700A (en) * 1980-10-14 1983-05-10 Youngren Fred R Shelf life indicator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011341A1 (fr) * 1995-09-19 1997-03-27 Nicola Massi Dispositif de detection et de decompte des ruptures de la chaine du froid dans des produits surgeles ou congeles
WO1999024799A1 (fr) * 1997-11-11 1999-05-20 Intec S.R.L. Dispositif permettant de detecter, d'evaluer et de signaler la decongelation de denrees alimentaires congelees et surgelees
US6378454B1 (en) 1997-11-11 2002-04-30 Intec S.R.L. Device for detecting, assessing and signaling thaw of frozen and deep frozen foodstuff
FR2789486A1 (fr) * 1999-02-05 2000-08-11 Forterie Bruno De Dispositif pour la detection et la mesure quantitative de l'exposition d'un objet a une temperature predeterminee
WO2001029525A1 (fr) * 1999-10-20 2001-04-26 Galdino Barbieri Dispositif pour la detection et la mesure quantitative de l'exposition d'un objet a une temperature et une duree predeterminees
US6968804B1 (en) 1999-10-20 2005-11-29 Galdino Barbieri Device for detecting and quantitatively measuring the exposure of an object to a predetermined temperature for a predetermined duration
JP2003533706A (ja) * 2000-05-15 2003-11-11 スリーエム イノベイティブ プロパティズ カンパニー 超小形構造の時間依存型インジケータ
WO2002000552A2 (fr) * 2000-06-23 2002-01-03 Innova/Pure Water, Inc. Indicateur de duree de vie d'un filtre a eau
WO2002000552A3 (fr) * 2000-06-23 2002-06-20 Innova Pure Water Inc Indicateur de duree de vie d'un filtre a eau
CN103578350A (zh) * 2013-06-13 2014-02-12 安徽理工大学 一种化学智能标签组件及其制备方法
CN103578350B (zh) * 2013-06-13 2016-01-06 安徽理工大学 一种化学智能标签组件及其制备方法
JP2018537694A (ja) * 2015-11-17 2018-12-20 ユーダブリュアイ テクノロジー リミテッド マイクロ流体経過時間インジケータ

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