GB963473A - Improvements in or relating to drying foodstuffs for subsequent rehydration - Google Patents

Improvements in or relating to drying foodstuffs for subsequent rehydration

Info

Publication number
GB963473A
GB963473A GB17398/59A GB1739859A GB963473A GB 963473 A GB963473 A GB 963473A GB 17398/59 A GB17398/59 A GB 17398/59A GB 1739859 A GB1739859 A GB 1739859A GB 963473 A GB963473 A GB 963473A
Authority
GB
United Kingdom
Prior art keywords
water
food
microwave energy
foodstuff
trolley
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
GB17398/59A
Inventor
Anthony John Hanson Sale
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.)
Unilever PLC
Original Assignee
Unilever PLC
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 Unilever PLC filed Critical Unilever PLC
Priority to GB17398/59A priority Critical patent/GB963473A/en
Publication of GB963473A publication Critical patent/GB963473A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/90—Preservation of foods or foodstuffs, in general by drying or kilning; Subsequent reconstitution
    • A23B2/97—Preservation of foods or foodstuffs, in general by drying or kilning; Subsequent reconstitution using irradiation or electric treatment, e.g. ultrasonic waves
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
    • A23L5/34—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation using microwaves

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

963,473. Drying in electric fields. UNILEVER Ltd. July 20, 1960 [May 21, 1959], No. 17398/59. Heading F4G. [Also in Divisions A2 and H5] A foodstuff is dried in a substantially uncompressed state by exposing it under low pressure and at a temperature above the freezing point of water to microwaves of wavelength from 3 to 50 cm., preferably from 10 to 35 cm., which are supplied at such intensity that water present in the foodstuff is rapidly vaporized therefrom, the water vapour thus generated being continuously removed. Food is dried within a glass flask 4 permeable to microwave energy and mounted on a polytetrafluoroethylene trolley 5 movable on rails 6 within a microwave oven 1 coupled to a magnetron by a waveguide 2. The neck of the flask is connected through flexible pressure tubing 8 to a rotary vacuum pump 10 by way of condensers 12, 13. During drying the trolley is moved slowly to and fro on the rails to improve the uniformity of absorption of the microwave energy and overheating of the food is avoided by the provision of flowing water through a tube 16 in the oven whereby the proportion of microwave energy absorbed by the water in the tube increases continuously as the food loses its water.
GB17398/59A 1959-05-21 1959-05-21 Improvements in or relating to drying foodstuffs for subsequent rehydration Expired GB963473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB17398/59A GB963473A (en) 1959-05-21 1959-05-21 Improvements in or relating to drying foodstuffs for subsequent rehydration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17398/59A GB963473A (en) 1959-05-21 1959-05-21 Improvements in or relating to drying foodstuffs for subsequent rehydration

Publications (1)

Publication Number Publication Date
GB963473A true GB963473A (en) 1964-07-08

Family

ID=10094501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17398/59A Expired GB963473A (en) 1959-05-21 1959-05-21 Improvements in or relating to drying foodstuffs for subsequent rehydration

Country Status (1)

Country Link
GB (1) GB963473A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364840A (en) * 1976-11-22 1978-06-09 Toshiba Corp Microwave heating apparatus
FR2481076A1 (en) * 1980-04-29 1981-10-30 Entremont Sa PROCESS FOR SEPARATING THE CONSTITUENTS OF A FOOD MATERIAL AND IN PARTICULAR BUTTER
GB2132325A (en) * 1982-11-24 1984-07-04 House Food Industrial Co Low pressure microwave drying apparatus
DE3637189A1 (en) * 1986-10-31 1988-05-11 Kali Chemie Ag Method for obtaining a product dissolved or suspended in a polar solvent, and device for microwave drying
US4808783A (en) * 1986-03-03 1989-02-28 Alfastar Ab Heat stable microwave energy sterilization method
GB2235755A (en) * 1989-08-09 1991-03-13 Elemer Varga Preparing fruit powder
GB2247815A (en) * 1990-08-03 1992-03-11 Univ Kansas State Dielectric heating
WO2005016012A1 (en) * 2003-08-13 2005-02-24 Unilever Plc Process for blanching vegetables
EP2389807A1 (en) * 2010-05-26 2011-11-30 BSH Bosch und Siemens Hausgeräte GmbH Oven and method for treating foods in an oven under reduced pressure

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5364840A (en) * 1976-11-22 1978-06-09 Toshiba Corp Microwave heating apparatus
FR2481076A1 (en) * 1980-04-29 1981-10-30 Entremont Sa PROCESS FOR SEPARATING THE CONSTITUENTS OF A FOOD MATERIAL AND IN PARTICULAR BUTTER
GB2132325A (en) * 1982-11-24 1984-07-04 House Food Industrial Co Low pressure microwave drying apparatus
US4808783A (en) * 1986-03-03 1989-02-28 Alfastar Ab Heat stable microwave energy sterilization method
DE3637189A1 (en) * 1986-10-31 1988-05-11 Kali Chemie Ag Method for obtaining a product dissolved or suspended in a polar solvent, and device for microwave drying
GB2235755A (en) * 1989-08-09 1991-03-13 Elemer Varga Preparing fruit powder
GB2247815A (en) * 1990-08-03 1992-03-11 Univ Kansas State Dielectric heating
WO2005016012A1 (en) * 2003-08-13 2005-02-24 Unilever Plc Process for blanching vegetables
US7678401B2 (en) 2003-08-13 2010-03-16 Unilever Bestfoods, North America, Division Of Conopco, Inc. Blanching vegetables
EP2389807A1 (en) * 2010-05-26 2011-11-30 BSH Bosch und Siemens Hausgeräte GmbH Oven and method for treating foods in an oven under reduced pressure

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