US3529362A - Insert for freeze-drying apparatus - Google Patents

Insert for freeze-drying apparatus Download PDF

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Publication number
US3529362A
US3529362A US715035A US3529362DA US3529362A US 3529362 A US3529362 A US 3529362A US 715035 A US715035 A US 715035A US 3529362D A US3529362D A US 3529362DA US 3529362 A US3529362 A US 3529362A
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US
United States
Prior art keywords
container
venting
dried
freeze
drying
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 - Lifetime
Application number
US715035A
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English (en)
Inventor
Hanns Eilenberg
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.)
Leybold Heraeus Verwaltung GmbH
Original Assignee
Leybold Heraeus Verwaltung GmbH
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 Leybold Heraeus Verwaltung GmbH filed Critical Leybold Heraeus Verwaltung GmbH
Application granted granted Critical
Publication of US3529362A publication Critical patent/US3529362A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
    • 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

Definitions

  • a supporting means having a wedge-shaped cross section is provided for supporting the material to be dried.
  • the supporting means is Water-vapor-permeable and extends along the length of the container, thereby forming a channel for drawing off water vapor from the material being dried.
  • the supporting means is so positioned in the container that the narrower end of its wedge-shaped cross section lies along the bottom of the container and the wider end reaches at least to the top of the surface of the material being dried.
  • the present invention relates to a container for use in freeze-drying apparatus and more particularly for the drying of bulk materials.
  • the present invention proposes to provide a support means having an element which extends along the length of a container used n freeze-drying operations.
  • the support means element is water-vapor-perrneable and serves as a venting element for Water vapor drawn from the drying material.
  • the venting element has a wedge-shaped cross section and is so disposed in the container that the narrower end portion of the wedge-shaped cross section rests on the bottom of the container and the wider portion of the Wedge-shaped cross section extends vertically at least to the level of the 3,529,362 Patented Sept. 22, 1970 ICC upper surface of the material to be dried.
  • openings in the venting element can advantageously be placed at that level where the ice-cotaining core of the material being dried is disposed during the freezedrying operation.
  • the wedge-shaped configuration of the venting element advantageously provides a means for reaching water vapors trapped in the upper reaches (with reference to the bottom or base of the container) of the material being dried.
  • the sloping sides of the venting element facilitate the collecting of water from the relatively thick material at the bottom of the container.
  • the venting element in elfect, provides a means or channel by which water vapor is drawn from the material being dried.
  • the angle between the sides of the Wedge-shaped venting member can be relatively narrow so that the volume, hence the load capacity, of the container is not unnecessarily reduced.
  • the venting element is a good heat conductor and is in heat-conducting contact with the bottom and/ or wall surfaces of the container.
  • heat can be transferred to the material to facilitate the drying operation.
  • the venting element is formed as a perforated or sievelike material with good heat-conducting property.
  • suitable sintered, screened or sponge-like materials is, however, also possible. The particular material used would depend on the ability of such material to draw off water vapor extracted from the material being dried equally as well as perforated or sieve-like materials.
  • the venting element is constructed as a separable element so that it may be removed as a unit from the container, as desired. lIt has also been found advantageaus to provide partitioned portions within the container and a venting element within each portion; venting elements in adjacent partitioned portions being ⁇ connected to one another.
  • FIG. l is a longitudinal sectional View taken generally along the plane dened by line 1-1 of FIG. 2, showing a container having a venting element according to the present invention.
  • FIG. 2 is a cross-sectional view of the container taken generally along the plane defined by reference line 2 2. of FIG. l and arranged within a schematically shown environmental control device.
  • FIG. 3 is a schematic and perspective view of the container having a venting member according to the invention as shown in FIGS. 1 and 2.
  • FIG. 1 a longitudinal section of a generally rectangularly shaped container 1 is shown therein.
  • the container 1 includes partition members 3 and, in addition, venting elements 2. Both members 3 and elements 2 serve as supporting means for any bulk materials introduced into the container 1 for freeze-drying.
  • the venting elements 2 include perforations 7, as shown also in FIG. 3, for drawing off water vapor from the material being dried.
  • the venting elements 2 are centrally disposed with respect to the space between partition members 3 within the container 1.
  • the venting elements 2 are wedge-shaped in cross section and include a narrow end 4 and a wider end 5.
  • the narrow end 4 of the venting element 2 can be formed such that it covers the bottom of the container.
  • the container may be arranged in a conventional environmental control device as shown schematically in FIG. 2. This device basically includes a vacuum chamber having an outlet to a vacuum pump, and a radiant heating element arranged within the chamber.
  • venting elements 2 are so arranged that the narrower end 4 of each element 2, respectively, is at the bottom of the container 1.
  • the wider end 5 of each venting element 2 is, correspondingly, vertically disposed with respect to the bottom of the container so that it extends above the top surface of the material in the container being freeze-dried.
  • venting elements 2 are connected to each other by spacers 6.
  • the venting elements 2 are removably assembled to the container 1.
  • the spacers 6 are used to hold the venting elements 2 in position when the material to be dried is poured into container 1.
  • These spacers 6 are located under hocks which are cut out of the elements 2 in such a manner that the whole venting assembly is under spring load.
  • venting element 2 is watervapor-permeable, being formed of a sieve-like or perforated material. It is also conceivable, however, that element 2 can be formed from sintered, screened or sponge-like materials provided such materials, as are used, are as effective as the preferred sieve-like or perforated materials. Another desirable characteristic of the element 2 is that it have good heat-conducting properties. Venting element 2 is positioned in container 1 in good heat-conducting contact with the bottom and/or side Walls thereof, so that, in addition to drawing water vapor from the material being dried, heat can be transferred to the material during the process to facilitate drying.
  • a vessel for freeze-drying apparatus used for drying relatively fine-grained bulk materials having provided along an inner surface thereof a water vapor venting channel, the improvement wherein said vessel comprises:
  • venting element having a wedge-shaped cross section and extending along the entire long dimension of the inner surface of said container;
  • venting element having the narrower end of said wedge-shaped cross section in contact with and extending along the bottom of said container;
  • said container being open to the top with said upper wider end of said Wedge-shaped cross section being spaced from other inner surfaces of said container whereby material to be freeze dried may be inserted from the top of the container, and water vapor may be vented from said material to the top of the container as well as through said venting element.
  • a vessel as dened in claim 2 wherein said venting element is formed of a good heat conductor and is in heatconducting contact With the bottom and/or side surfaces of said container.
  • venting element is separably assembled to said vessel in consequence of which said venting element is removable therefrom as a structural unit.
  • (c) means connecting said venting element in adjacent partitioned portions to each other.
  • Apparatus for freeze drying relatively fine-grained bulk materials having provided along an inner surface thereof a water vapor venting channel, the improvement wherein said apparatus comprises:
  • venting element having a wedge-shaped cross section and extending along the entire long dimension of the inner surface of said container;
  • venting element having the narrower end of said wedge-shaped cross section in contact with and extending along vthe bottom of said container;
  • (g) means for subjecting a frozen material within said container to a sub-atmospheric pressure and a temperature such that frozen liquids within the material are sublimated to a vapor which may be removed via said venting element.
  • a method of freezing a relatively fine-grained bulk material comprising, in combination:
  • venting channel formed along one of its sides, which venting channel includes a pair of inclined walls which are in contact with the bottom of said container, and which are closely spaced from each other by a greater distance at the top of the container, said walls being vapor permeable and said venting element being open to the top for the passage of vapor therein,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
US715035A 1967-03-21 1968-03-21 Insert for freeze-drying apparatus Expired - Lifetime US3529362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0056065 1967-03-21

Publications (1)

Publication Number Publication Date
US3529362A true US3529362A (en) 1970-09-22

Family

ID=7277451

Family Applications (1)

Application Number Title Priority Date Filing Date
US715035A Expired - Lifetime US3529362A (en) 1967-03-21 1968-03-21 Insert for freeze-drying apparatus

Country Status (6)

Country Link
US (1) US3529362A (xx)
BE (1) BE712397A (xx)
CH (1) CH459071A (xx)
FR (1) FR1557391A (xx)
GB (1) GB1221833A (xx)
NL (1) NL152974B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158322A2 (en) * 1984-04-12 1985-10-16 Hag Gf Aktiengesellschaft Insert container for freeze-drying plants
RU223098U1 (ru) * 2023-07-18 2024-01-31 Общество с ограниченной ответственностью "Субтех" Лоток для размещения сублимируемого продукта

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748472A1 (de) * 1997-11-03 1999-05-06 Suwelack Nachf Dr Otto Vorrichtung zum Gefriertrocknen von Kollagen aus tierischen Rohstoffen und anderen Biomatrices, die aus Polysacchariden gewonnen worden sind und Verfahren zur Herstellung dieser Produkte

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1149548A (en) * 1912-07-19 1915-08-10 Henry L Walbridge Wrapping and checking device for store-service.
US1349458A (en) * 1919-09-19 1920-08-10 Johnson Carl Edward Drier-tray
DE1135831B (de) * 1961-10-12 1962-08-30 Leybold Hochvakuum Anlagen Vorrichtung zur Gefriertrocknung
US3401468A (en) * 1966-03-08 1968-09-17 Leybold Anlagen Holding A G Product container for freeze drying

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1149548A (en) * 1912-07-19 1915-08-10 Henry L Walbridge Wrapping and checking device for store-service.
US1349458A (en) * 1919-09-19 1920-08-10 Johnson Carl Edward Drier-tray
DE1135831B (de) * 1961-10-12 1962-08-30 Leybold Hochvakuum Anlagen Vorrichtung zur Gefriertrocknung
US3401468A (en) * 1966-03-08 1968-09-17 Leybold Anlagen Holding A G Product container for freeze drying

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158322A2 (en) * 1984-04-12 1985-10-16 Hag Gf Aktiengesellschaft Insert container for freeze-drying plants
EP0158322A3 (en) * 1984-04-12 1986-08-27 Hag Gf Aktiengesellschaft Insert container for freeze-drying plants
RU223098U1 (ru) * 2023-07-18 2024-01-31 Общество с ограниченной ответственностью "Субтех" Лоток для размещения сублимируемого продукта

Also Published As

Publication number Publication date
BE712397A (xx) 1968-07-31
NL152974B (nl) 1977-04-15
NL6803879A (xx) 1968-09-23
GB1221833A (en) 1971-02-10
CH459071A (de) 1968-06-30
FR1557391A (xx) 1969-01-06

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