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An indicating device for displaying the temperature history of an object over time

A technology for indicating devices, time and temperature, applied to thermometers with physical/chemical changes, thermometers that give average/integral values, thermometers, etc., can solve problems that are not suitable for mass production

Inactive Publication Date: 2007-06-27
约翰·里梅尔莫泽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The products described above have several disadvantages, including the need to remove the barrier strips to activate their operation
In addition, the product is not suitable for use in high-volume production processes (such as filling milk cartons)

Method used

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  • An indicating device for displaying the temperature history of an object over time
  • An indicating device for displaying the temperature history of an object over time
  • An indicating device for displaying the temperature history of an object over time

Examples

Experimental program
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Embodiment Construction

[0049] Referring to FIG. 1 , there is shown a temperature indicating device 100 according to a first embodiment of the present invention, which comprises a plurality of layers 1 to 5 . FIG. 1 also shows the relative sizes of the different components between layers 1 and 5 .

[0050] Layers 1 and 5 are formed from polymer films 10, 50, with layer 5 being as thin as possible to ensure good thermal conductivity. Layer 5 has adhesive applied to both sides 51 and 52 .

[0051] Layer 4 comprises a reservoir 40 of indicating material and in this embodiment the reservoir 40 is a blotter paper impregnated with a colored organic compound such as a fatty acid or alcohol or derivatives thereof. As an alternative to blotting paper, any form of sponge or woven or non-woven fibrous material can also be used as the storage device.

[0052] Layer 3 comprises a wicking member 30 which is a thin blotting paper. Alternatively, any form of woven or non-woven sheet material having the requisite ...

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PUM

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Abstract

An indicating device (100) for displaying temperature history of an object over time includes, a reservoir (40) of indicating material secured with respect to said object, the indicating material being solid below a predetermined temperature and liquid at or above this predetermined temperature; a wicking member (30) arranged with respect to the reservoir so that the indicating material is able to migrate from the reservoir through the wicking member to a peripheral portion spaced from the reservoir; and indicator means spaced from the reservoir so that migration of the indicating material to the indicator means indicates a predetermined temperature history; wherein said indicator means includes a barrier member (20) located on the wicking member and having a barrier region positioned between the reservoir and said peripheral portion of the wicking member and wherein said barrier member prevents viewing of the migration of the indicating material through the wicking member until it migrates past said barrier region of the barrier member.

Description

technical field [0001] The present invention relates to an indicating device capable of displaying the temperature history of an object over a period of time Background technique [0002] The present invention seeks to provide an indication when a subject has been exposed to a predetermined temperature for a predetermined period of time. It will have a variety of applications, however it is particularly useful in relation to packaged food products, including dairy products such as milk. [0003] Milk is generally sold in cardboard boxes, and safe handling practices and government regulations require that this product not be exposed to temperatures above a predetermined level for a set period of time. In the case of milk, the product should not be exposed to temperatures above 5°C for more than 15 minutes. [0004] The factory meets these requirements by ensuring that this product is always stored or kept in adequately cooled conditions. However, this is not always possibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/06G01K3/04
CPCG01K3/04
Inventor 约翰·里梅尔莫泽
Owner 约翰·里梅尔莫泽