GB1103652A - Method of drying tanned leathers and skins - Google Patents

Method of drying tanned leathers and skins

Info

Publication number
GB1103652A
GB1103652A GB41987/66A GB4198766A GB1103652A GB 1103652 A GB1103652 A GB 1103652A GB 41987/66 A GB41987/66 A GB 41987/66A GB 4198766 A GB4198766 A GB 4198766A GB 1103652 A GB1103652 A GB 1103652A
Authority
GB
United Kingdom
Prior art keywords
leather
pressure
space
cover
water
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
GB41987/66A
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
Publication of GB1103652A publication Critical patent/GB1103652A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/26—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/58—Drying
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/045—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying thin, flat articles in a batch operation, e.g. leather, rugs, gels
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/07—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards; Fastening devices; Drying of leather

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

In freeze-drying tanned leather, e.g. a tanned skin, the leather is stretched over a first polished surface and covered with a fluid-tight cover, the pressure of air in the space between the surface and cover is reduced and the surface is cooled to a temperature below 0 DEG C., e.g. to -25 DEG C., to freeze the water in the leather. The pressure in said space is then brought to normal atmospheric pressure, the leather is uncovered and the resulting stiff sheet of frozen leather is removed from the surface and transferred on to a second polished surface, at such a speed that the frozen water in the leather has no time to melt. The pressure of the air in the space between said second surface and cover is then reduced and the second surface is heated, e.g. to a temperature between 65 and 90 DEG C., to sublime said frozen water. The pressure in the second space is brought to normal atmospheric pressure and the dried leather is uncovered and removed from the second surface. Preferably, each cover has, on its inner surface, a flexible cushion, which is permeable to air and water-vapour. The pressure in said spaces may be reduced by applying suction through the cushions. Vacuum-drying apparatus disclosed in French Specification 1,460,696 may be used.
GB41987/66A 1965-09-23 1966-09-20 Method of drying tanned leathers and skins Expired GB1103652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR32495A FR1459130A (en) 1965-09-23 1965-09-23 Process for drying tanned hides and skins and resulting products

Publications (1)

Publication Number Publication Date
GB1103652A true GB1103652A (en) 1968-02-21

Family

ID=8588978

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41987/66A Expired GB1103652A (en) 1965-09-23 1966-09-20 Method of drying tanned leathers and skins

Country Status (4)

Country Link
US (1) US3362077A (en)
DE (1) DE1660034A1 (en)
FR (1) FR1459130A (en)
GB (1) GB1103652A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115928A (en) * 1973-12-17 1978-09-26 Armour Pharmaceutical Company Freeze-dry process and product
IT246338Y1 (en) * 1998-11-02 2002-04-08 Incoma Srl VACUUM DRYING DEVICE
ES2299365B1 (en) * 2006-07-21 2009-04-01 Asociacion De Investigacion De Las Industrias Del Curtido Y Anexas DRYING PROCEDURE FOR CURED SKINS AND CORRESPONDING DEVICES.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1009881A (en) * 1911-03-27 1911-11-28 William H Allen Process of drying hides.
US2354200A (en) * 1940-11-25 1944-07-25 United Shoe Machinery Corp Method of drying hides and skins
DE1435309A1 (en) * 1960-11-18 1968-11-28 Luigi Turato Device for drying and smoothing leather
US3224109A (en) * 1962-02-09 1965-12-21 Cartigliano Off Spa Apparatus for the vacuum-drying of leather
US3253351A (en) * 1963-02-05 1966-05-31 Bettanin Giuseppe Vacuum-drying apparatus
US3316655A (en) * 1963-04-16 1967-05-02 Bocciardo Paolo Apparatus for drying tanned skins under vacuum
DE1263979B (en) * 1964-04-07 1968-03-21 Trockentechnik G M B H Process for drying flat material, especially leather

Also Published As

Publication number Publication date
DE1660034A1 (en) 1971-03-11
FR1459130A (en) 1966-04-29
US3362077A (en) 1968-01-09

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