GB910520A - Temperature responsive elements - Google Patents

Temperature responsive elements

Info

Publication number
GB910520A
GB910520A GB2480560A GB2480560A GB910520A GB 910520 A GB910520 A GB 910520A GB 2480560 A GB2480560 A GB 2480560A GB 2480560 A GB2480560 A GB 2480560A GB 910520 A GB910520 A GB 910520A
Authority
GB
United Kingdom
Prior art keywords
temperature
oil
spoilage
wax
blob
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.)
Expired
Application number
GB2480560A
Inventor
Donald West Davidson
Keith Usherwood Ingold
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.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
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 National Research Council of Canada filed Critical National Research Council of Canada
Priority to GB2480560A priority Critical patent/GB910520A/en
Publication of GB910520A publication Critical patent/GB910520A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/02—Arrangements or devices for indicating incorrect storage or transport

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

910,520. Temperature indicators. NATIONAL RESEARCH COUNCIL. July 15, 1960, No. 24805/60. Drawings to Specification. Class 97 (3). A temperature-responsive element for indicating spoilage of a product such as frozen food, pharmaceuticals or photographic material, due to overheating comprises an inert oil or wax or mixture thereof having a melting range, i.e. not a sharply defined melting point, in the neighbourhood of the spoilage temperature and in contact therewith a permeable member which provides a diffusion path for the oil or wax when melted. By " inert " oil or wax is meant one which is not chemically reactive and undergoes little or no oxidation when exposed to air for long periods. In an example a greasy blob of a hydrocarbon oil, which is naturally coloured or contains colouring matter, is applied to the inner wrapper of a food product and the outer wrapper is then applied and the product frozen so that the blob is solidified. If the food product is exposed to temperatures above the spoilage temperature, the oil blob melts and diffuses through the outer wrapper, the speed of diffusion depending on the excess of temperature above the spoilage temperature.
GB2480560A 1960-07-15 1960-07-15 Temperature responsive elements Expired GB910520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2480560A GB910520A (en) 1960-07-15 1960-07-15 Temperature responsive elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2480560A GB910520A (en) 1960-07-15 1960-07-15 Temperature responsive elements

Publications (1)

Publication Number Publication Date
GB910520A true GB910520A (en) 1962-11-14

Family

ID=10217501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2480560A Expired GB910520A (en) 1960-07-15 1960-07-15 Temperature responsive elements

Country Status (1)

Country Link
GB (1) GB910520A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34515E (en) 1979-06-11 1994-01-18 Pymah Corporation Steam sterilization indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34515E (en) 1979-06-11 1994-01-18 Pymah Corporation Steam sterilization indicator

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