EP0236873B1 - Refrigerated recipient for butter or the like - Google Patents

Refrigerated recipient for butter or the like Download PDF

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Publication number
EP0236873B1
EP0236873B1 EP87102779A EP87102779A EP0236873B1 EP 0236873 B1 EP0236873 B1 EP 0236873B1 EP 87102779 A EP87102779 A EP 87102779A EP 87102779 A EP87102779 A EP 87102779A EP 0236873 B1 EP0236873 B1 EP 0236873B1
Authority
EP
European Patent Office
Prior art keywords
cooling
possesses
lid
tray
base
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
EP87102779A
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German (de)
French (fr)
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EP0236873A1 (en
Inventor
Andreas Von Zelewski
Zenon Kapela
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Individual
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Individual
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Publication date
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Priority to AT87102779T priority Critical patent/ATE56350T1/en
Publication of EP0236873A1 publication Critical patent/EP0236873A1/en
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Publication of EP0236873B1 publication Critical patent/EP0236873B1/en
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Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G19/00—Table service
    • A47G19/26—Butter or cheese dishes or covers, with or without cooling or heating devices; Protective covers for food containers

Definitions

  • the invention relates to a cooling container for butter or the like with the features specified in the preamble of claim 1.
  • a cooling container e.g. Butter should be kept at a relatively constant and low temperature while maintaining their spreadability.
  • cooling containers for butter known (DE-PS 44 370, DE-PS 809 466 and FR-A 822 434), in which the lid is in the form of a bell, or a hood, which is supported on insulated soil and with absorbent Material are covered.
  • the bell can also consist of porous clay (DE-GM 8130421).
  • a cooling container according to the preamble of claim 1 is known from FR-A 822 434.
  • an uncooled butter dish with a removable lid which can be pivoted in a joint is known (DE-OS 1 529 341).
  • the joint is formed by a hook-shaped web arranged on the cover, which engages in a slot in the butter dish.
  • the invention has for its object to provide a cooling container of the type mentioned in the preamble of claim 1, in which frequent water refilling is unnecessary and in which perfect hygienic conditions and simple operation when removing the butter, when filling the water with water level indicator and should be guaranteed during the maintenance of the absorbent material.
  • the design of the cooling container should make it easy to replace the absorbent material. It is advantageous to moisten a sheet of kitchen paper, which is normally found in every kitchen, and to put it on the lid and the fin-like extension. A simple structural design should result if the fin-like extension is used for the articulated connection of the cooling container.
  • the arrangement of a channel has the advantage that water when the cooling container is closed i.e. can be refilled with the lid on, without water getting onto the goods to be cooled when it is poured onto the top of the lid.
  • the water storage container is separated from the butter chamber and the cooling lid, which can be easily plugged in and is articulated, can be easily covered with absorbent material.
  • the protective cap reduces contamination of the absorbent material and prevents the water from evaporating too quickly, which corresponds to hygienic requirements.
  • the cooling container is also suitable for keeping food such as cheese fresh. Practice has shown that, for example, even sandwiches can keep the freshness in the cooling container for hours without drying out.
  • the cooling container for butter consists of a cooling lid 1, a base 2 and a butter dish 3.
  • the cooling lid 1 consists of an inner wall 4, which is surrounded at the bottom at the front and on the side by a groove 6 and has a fin-like extension 5 at the rear, which is designed accordingly forms an easily attachable joint 12 in connection with the base frame 2.
  • the inner wall 4 and the fin-like extension 5 are coated on the outside with an absorbent material 8.
  • the base frame 2 is designed as a water reservoir 11, on the front of which there is a viewing window 10 through which the water level can be checked. To refill water, it only needs to be poured onto the surface of the cooling lid.
  • the water collects in the channels 6 and can flow from there via the fin-like extension 5 into the water reservoir 11.
  • a removable base plate is placed in the upper area of the base frame 2. This has a depression or curvature for centering the butter dish and can be designed either as a thermal insulation plate 15 (FIG. 2) or as a cooling floor. In the latter embodiment, the Bo denplatte provided with a fin-like extension 13.
  • the base plate and extension are covered with absorbent material 8.
  • the base plate is separated from the water by a partition plate 14, the base frame 2 being perforated at the top on the side and at the front in order to allow the water to evaporate (FIG. 3).
  • a removable butter dish 3 can be placed on the base plate.
  • the absorbent material 8 When the water reservoir 11 is filled with water, the absorbent material 8 is placed on it and the cooling lid 1 is closed, the water is sucked in by the absorbent material 8 located on the fin-like extension and distributed on the surface of the cooling lid, where it evaporates. This removes heat from the room under the cooling lid, so that butter placed there is kept cool and keeps its spreadability.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)
  • Dairy Products (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)

Abstract

1. A cooling box for butter or similar foodstuffs, comprising a base (2), the upper part of which has the form of a plate (15) for holding a butter tray (3) and the lower part of which has the form of a water container (11), and a cooling lid (1) which can be inserted into the base (2) and which possesses a thin inner wall (4) upon which there rests a piece of absorbent material (8) which itself is in contact with the water container (11), being characterized as follows : that the cooling lid (1) is joined to the base (2) in an articulated manner, that the cooling lid (1) possesses a perforated protective cap (9) covering the absorbent material (8), that the inner wall (4) of the cooling lid (1) possesses a wide fin-shaped prolongation (5) which is immersed in the water container (11) and is covered with the absorbent material (8) on the cooling lid (1), that the inner wall (4) of the cooling lid (1) is surrounded on its front outer edge, i.e. on the opposite edge from the articulated joint, and on the sides by a groove (6), the purpose of which is to allow water to run off and, at the same time, to act as a spacer between the inner wall (4) and the outer protective cap (9), and that a handle (7) is present on that section of the groove which runs along the front edge of the cooling lid (1).

Description

Die Erfindung betrifft einen Kühlbehälter für Butter oder dergleichen mit den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen. In einem solchen Kühlbehälter kann z.B. Butter bei verhältnismäßig konstanter und niedriger Temperatur aufbewahrt werden, wobei ihre Streichfähigkeit erhalten bleibt.The invention relates to a cooling container for butter or the like with the features specified in the preamble of claim 1. In such a cooling container e.g. Butter should be kept at a relatively constant and low temperature while maintaining their spreadability.

Es sind verschiedene Kühlbehälter für Butter bekannt (DE-PS 44 370, DE-PS 809 466 und FR-A 822 434), bei denen der Deckel in Form einer Glocke, oder einer Haube ausgebildet ist, die auf isoliertem Boden abgestützt und mit saugfähigem Material überzogen sind. Die Glocke kann auch aus porösem Ton bestehen (DE-GM 8130421). Ein Kühlbehälter gemäß Oberbegriff des Anspruches 1 ist durch die FR-A 822 434 bekannt.There are various cooling containers for butter known (DE-PS 44 370, DE-PS 809 466 and FR-A 822 434), in which the lid is in the form of a bell, or a hood, which is supported on insulated soil and with absorbent Material are covered. The bell can also consist of porous clay (DE-GM 8130421). A cooling container according to the preamble of claim 1 is known from FR-A 822 434.

Bei manchen Behältern ist das Wasser oft in kurzer Zeit verdunstet. Auch ist die Wartung des saugfähigen Materials problematisch. Da eine Schutzkappe über der feuchte Schicht fehlt, genügen diese Behälter nicht den Anforderungen hinsichtlich Hygiene und Ästhetik. Beim Öffnen dieser Behälter besteht die Gefahr, daß Wasser ausgeschüttet wird und man braucht einen freien, sauberen Platz, um die Glocke oder Haube abzulegen, so daß die Handhabung umständlich und unhygienisch ist.With some containers, the water often evaporates in a short time. Maintenance of the absorbent material is also problematic. Since a protective cap is missing over the moist layer, these containers do not meet the requirements in terms of hygiene and aesthetics. When opening these containers, there is a risk that water will be poured out and a free, clean place is needed to put the bell or hood down, so that the handling is cumbersome and unsanitary.

Ferner ist eine ungekühlte Butterdose mit einem abnehmbaren und in einem Gelenk schwenkbaren Deckel bekannt (DE-OS 1 529 341). Das Gelenk ist durch einen an dem Deckel angeordneten, hakenförmigen Steg gebildet, der in der Butterschale in einen Schlitz eingreift.Furthermore, an uncooled butter dish with a removable lid which can be pivoted in a joint is known (DE-OS 1 529 341). The joint is formed by a hook-shaped web arranged on the cover, which engages in a slot in the butter dish.

Der Erfindung liegt die Aufgabe zugrunde, einen Kühlbehälter der im Oberbegriff des Patentanspruchs 1 genannten Art zu schaffen, bei dem sich häufiges Wassernachfüllen erübrigt und bei dem dennoch einwandfreie hygienische Verhältnisse und eine einfache Bedienung bei der Entnahme der Butter, beim Auffüllen des Wassers mit Wasserstandanzeige und bei der Wartung des saugfähigen Materials gewährleistet sein sollen. Durch die Ausbildung des Kühlbehälters soll sich das saugfähige Material leicht auswechseln lassen. Vorteilhaft ist ein Blatt Küchenpapier, was normalerweise in jeder Küche zu finden ist, zu befeuchten und auf den Deckel und den flossenartigen Fortsatz aufzulegen. Eine einfache konstruktive Ausbildung soll sich ergeben, wenn der flossenartigen Fortsatz für die gelenkige Verbindung des Kühlbehälters herangezogen wird. Die Anordnung einer Rinne hat den Vorteil, daß Wasser bei geschlossenem Kühlbehälter d.h. bei aufgesetztem Deckel nachgefüllt werden kann, ohne daß Wasser auf das zu kühlende Gut gelangt, wenn es auf der Oberseite des Deckels gegossen wird.The invention has for its object to provide a cooling container of the type mentioned in the preamble of claim 1, in which frequent water refilling is unnecessary and in which perfect hygienic conditions and simple operation when removing the butter, when filling the water with water level indicator and should be guaranteed during the maintenance of the absorbent material. The design of the cooling container should make it easy to replace the absorbent material. It is advantageous to moisten a sheet of kitchen paper, which is normally found in every kitchen, and to put it on the lid and the fin-like extension. A simple structural design should result if the fin-like extension is used for the articulated connection of the cooling container. The arrangement of a channel has the advantage that water when the cooling container is closed i.e. can be refilled with the lid on, without water getting onto the goods to be cooled when it is poured onto the top of the lid.

Diese Aufgabe wird bei dem Kühlbehälter nach dem Oberbegriff erfindungsmäßig durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved according to the invention in the cooling container according to the preamble by the features specified in the characterizing part of patent claim 1.

Vorteilhafte Ausbildungen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen 2 bis 7 dargestellt.Advantageous developments of the subject matter of the invention are shown in the dependent claims 2 to 7.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß der Wasservorratsbehälter vom Butterraum getrennt ist und der leicht aufsteckbar und gelenkig angeordneter Kühldeckel in einfacher Weise mit saugfähigem Material überzogen werden kann. Die Schutzkappe vermindert eine Verschmutzung des saugfähigen Materials und verhindert eine zu rasche Verdunstung des Wassers, was den hygienischen Forderungen entspricht.The advantages achieved by the invention are, in particular, that the water storage container is separated from the butter chamber and the cooling lid, which can be easily plugged in and is articulated, can be easily covered with absorbent material. The protective cap reduces contamination of the absorbent material and prevents the water from evaporating too quickly, which corresponds to hygienic requirements.

Vorteilhafte Ausgestaltung des Gegenstandes der Erfindung ist zusätzlich noch in dem Unteranspruch 3 angegeben. Durch die Ausbildung gemäß diesen Patentanspruch läßt sich eine wirksame Kühlung der Butterschale von unten her erzielen.An advantageous embodiment of the subject matter of the invention is additionally specified in subclaim 3. By training according to this claim, an effective cooling of the butter dish can be achieved from below.

Der Kühlbehälter ist auch zum Frischhalten von Nahrungsmitteln wie zum Beispiel Käse gut geeignet. Die Praxis hat gezeigt, daß zum Beispiel auch belegte Brote stundenlang die Frische im Kühlbehälter halten können ohne auszutrocknen.The cooling container is also suitable for keeping food such as cheese fresh. Practice has shown that, for example, even sandwiches can keep the freshness in the cooling container for hours without drying out.

Die Erfindung wird anhand von in der Zeichnung dargestellten Ausführungsbeispielen im folgenden näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.

Es zeigen:

  • Figur 1: ein geöffneten Kühlbehälter in perspektivischer Darstellung,
  • Figur 2: einen Querschnitt durch einen Kühlbehälter mit einer Thermoisolierplatte,
  • Figur 3: einen Querschnitt durch einen Kühlbehälter mit einem Kühlboden und,
  • Figur 4: einen Teilquerschnitt durch die Innenwand und das Untergestell mit der gelenkigen Verbindung.
Show it:
  • FIG. 1: an opened cooling container in perspective,
  • FIG. 2: a cross section through a cooling container with a thermal insulation panel,
  • FIG. 3 shows a cross section through a cooling container with a cooling base and
  • Figure 4: a partial cross section through the inner wall and the base with the articulated connection.

Der Kühlbehälter für Butter besteht aus einem Kühldeckel 1, einem Untergestell 2 und einer Butterschale 3. Der Kühldeckel 1 besteht aus einer Innenwand 4, die unten vorne und seitlich von einer Rinne 6 umgeben ist und hinten einen flossenartigen Fortsatz 5 aufweist, der durch entsprechende Gestaltung in Verbindung mit dem Untergestell 2 ein leicht aufsetzbares Gelenk 12 bildet. Die Innenwand 4 und der flossenartige Fortsatz 5 sind auf ihrer Außenseite mit einem saugfähigem Material 8 überzogen. Auf der Außenseite der vorderen Rinne 6 befindet sich ein Griff 7, um das Öffnen und Schließen des Kühldeckels 1 zu erleichtern.The cooling container for butter consists of a cooling lid 1, a base 2 and a butter dish 3. The cooling lid 1 consists of an inner wall 4, which is surrounded at the bottom at the front and on the side by a groove 6 and has a fin-like extension 5 at the rear, which is designed accordingly forms an easily attachable joint 12 in connection with the base frame 2. The inner wall 4 and the fin-like extension 5 are coated on the outside with an absorbent material 8. On the outside of the front channel 6 there is a handle 7 to make it easier to open and close the cooling cover 1.

Auf dem äußeren Rand der Rinne 6 ist eine abnehmbare, gelochte Schutzkappe 9 aufgesetzt, die das saugfähige Material 8 vor Schmutz und zu rascher Verdunstung des Wassers schützt. Das Untergestell 2 ist als Wasservorratsbehälter 11 ausgebildet, an dessen Vorderseite sich ein Sichtfenster 10 befindet, durch das der Wasserstand kontrolliert werden kann. Zum Nachfüllen von Wasser braucht dieses lediglich auf die Oberfläche des Kühldeckels gegossen zu werden.On the outer edge of the channel 6, a removable, perforated protective cap 9 is placed, which protects the absorbent material 8 from dirt and rapid evaporation of the water. The base frame 2 is designed as a water reservoir 11, on the front of which there is a viewing window 10 through which the water level can be checked. To refill water, it only needs to be poured onto the surface of the cooling lid.

Das Wasser sammelt sich in den Rinnen 6 und kann von da über den flossenartigen Fortsatz 5 in den Wasservorratsbehälter 11 fließen. Im oberen Bereich des Untergestells 2 ist eine abnehmbare Bodenplatte aufgesetzt. Diese weist eine Vertiefung oder Wölbung zum Zentrieren der Butterschale auf und kann entweder als Thermoisolierplatte 15 (Figur 2) oder als Kühlboden ausgebildet sein. Bei der zuletzt genannten Ausführungsform ist die Bodenplatte mit einem flossenartigen Fortsatz 13 versehen. Bodenplatte und Fortsatz sind mit saugfähigem Material 8 überzogen. Die Bodenplatte ist durch eine Trennplatte 14 vom Wasser abgetrennt, wobei das Untergestell 2, um die Verdunstung des Wassers zu ermöglichen, oben seitlich und vorne gelocht ist (Figur 3).The water collects in the channels 6 and can flow from there via the fin-like extension 5 into the water reservoir 11. A removable base plate is placed in the upper area of the base frame 2. This has a depression or curvature for centering the butter dish and can be designed either as a thermal insulation plate 15 (FIG. 2) or as a cooling floor. In the latter embodiment, the Bo denplatte provided with a fin-like extension 13. The base plate and extension are covered with absorbent material 8. The base plate is separated from the water by a partition plate 14, the base frame 2 being perforated at the top on the side and at the front in order to allow the water to evaporate (FIG. 3).

Auf die Bodenplatte kann eine herausnehmbare Butterschale 3 aufgesetzt werden.A removable butter dish 3 can be placed on the base plate.

Wenn der Wasservorratsbehälter 11 mit Wasser gefüllt, das saugfähige Material 8 aufgelegt und der Kühldeckel 1 geschlossen ist, wird das Wasser durch das auf dem flossenartigen Fortsatz befindliche saugfähige Material 8 angesaugt und auf der Oberfläche des Kühldeckels verteilt, wo es verdunstet. Dabei wird dem Raum unter dem Kühldeckel Wärme entzogen, so daß dort eingebrachte Butter kühl gehalten wird und ihre Streichfähigkeit behält.When the water reservoir 11 is filled with water, the absorbent material 8 is placed on it and the cooling lid 1 is closed, the water is sucked in by the absorbent material 8 located on the fin-like extension and distributed on the surface of the cooling lid, where it evaporates. This removes heat from the room under the cooling lid, so that butter placed there is kept cool and keeps its spreadability.

Claims (7)

1. A cooling box for butter or similar foodstuffs, comprising a base (2), the upper part of which has the form of a plate (15) for holding a butter tray (3) and the lower part of which has the form of a water container (11), and a cooling lid (1) which can be inserted into the base (2) and which possesses a thin inner wall (4) upon which there rests a piece of absorbent material (8) which itself is in contact with the water container (11), being characterized as follows: that the cooling lid (1) is joined to the base (2) in an articulated manner, that the cooling lid (1) possesses a perforated protective cap (9) covering the absorbent material (8), that the inner wall (4) of the cooling lid (1) possesses a wide fin-shaped prolongation (5) which is immersed in the water container (11) and is covered with the absorbent material (8) on the cooling lid (1), that the inner wall (4) of the cooling lid (1) is surrounded on its front outer edge, i.e. on the opposite edge from the articulated joint, and on the sides by a groove (6), the purpose of which is to allow water to run off and, at the same time, to act as a spacer between the inner wall (4) and the outer protective cap (9), and that a handle (7) is present on that section of the groove which runs along the front edge of the cooling lid (1).
2. A cooling box according to Claim 1, being characterized as follows: that the articulated joint between the cooling lid (1) and the base (2) is effected by means of the fin-shaped prolongation (5).
3. A cooling box according to one of the Claims 1 to 2, being characterized as follows: that the plate (15) for holding the butter tray (3) has the form of a cooling tray which possesses a fin-shaped prolongation (13), this being immersed in the water container (11), with the underside of the cooling tray and the prolongation (13) being covered with absorbent material (8), and furthermore that the cooling tray is separated from the water container (11) by a separator plate (14) arranged at a distance from the cooling tray and that the side and front walls of the base (2) possess openings for evaporation of water in the area between the separator plate (14) and the cooling tray.
4. A cooling box according to one of the Claims 1 to 3, being characterized as follows: that a window (10) is present in the front wall of the base (2) for the purpose of monitoring the water level.
5. A cooling box according to one of the Claims 1 to 4, being characterized as follows: that the cooling box consists of plastics which do not prove harmful to foodstuffs.
6. A cooling box according to one of the Claims 1 to 5, being characterized as follows: that the plate (15) for holding the butter tray (3) possesses an angular or concave recess for correct positioning of the butter tray (3).
7. A cooling box according to one of the Claims 1 to 6, being characterized as follows: that the protective cap (9) possesses a drip edge (16) which extends around the inside and also possesses a cover (17) at the rear.
EP87102779A 1986-03-07 1987-02-26 Refrigerated recipient for butter or the like Expired - Lifetime EP0236873B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102779T ATE56350T1 (en) 1986-03-07 1987-02-26 REFRIGERATOR FOR BUTTER OR SIMILAR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607533 DE3607533A1 (en) 1986-03-07 1986-03-07 REFRIGERATOR FOR BUTTER
DE3607533 1986-03-07

Publications (2)

Publication Number Publication Date
EP0236873A1 EP0236873A1 (en) 1987-09-16
EP0236873B1 true EP0236873B1 (en) 1990-09-12

Family

ID=6295759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102779A Expired - Lifetime EP0236873B1 (en) 1986-03-07 1987-02-26 Refrigerated recipient for butter or the like

Country Status (6)

Country Link
US (1) US4892225A (en)
EP (1) EP0236873B1 (en)
AT (1) ATE56350T1 (en)
DE (1) DE3607533A1 (en)
ES (1) ES2019312B3 (en)
WO (1) WO1993012700A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5078234A (en) * 1990-11-23 1992-01-07 Lin Tung Han Oil basin for electric discharge machine
US6290412B1 (en) 2000-11-16 2001-09-18 James O. Birmingham Butter melter and applicator
US8056764B2 (en) 2004-06-24 2011-11-15 Select-Measure Consumption, L.L.C. Metered volume liquid dispensing device
US10258177B2 (en) * 2016-10-27 2019-04-16 Joelle Mertzel Butter dish with securable spreader in rotatable lid
US11617461B2 (en) * 2019-08-15 2023-04-04 Daniel Blore Food product storage and serving assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE44370C (en) * W. BRÜCKNER in Dresden, Kaulbachstr. 18 I Food refrigerator and the like
DD44370A (en) *
US1369367A (en) * 1920-01-05 1921-02-22 Henry M Whitney Cooling-container
GB319127A (en) * 1928-08-31 1929-09-19 George William English Improvements in apparatus for driving handles on to cutlery edge tools and the like
GB312737A (en) * 1928-10-31 1929-06-13 Richard Owen Thomas Improvements in and relating to dishes or receptacles for warming or cooling butter and like foodstuffs
CH181625A (en) * 1935-06-08 1935-12-31 A Fuellemann Butter cooler.
FR822434A (en) * 1936-06-03 1937-12-30 Improvements to cooling containers for butter or other similar substances
CH203667A (en) * 1938-03-31 1939-03-31 Finsterwald Karl Cheese dome with means for humidifying the air trapped in the dome.
DE809466C (en) * 1949-10-27 1951-07-30 Fritz Duerr Cooling hood
US3180111A (en) * 1962-11-05 1965-04-27 United Aircraft Corp Combined insulating and cooling blanket
DE1529341A1 (en) * 1966-12-17 1969-09-11 Bayerische Metallwarenfabrik M Butter dish with lid
DE8130421U1 (en) * 1981-10-17 1982-03-25 Grönland-Keramik-Industrie, 6320 Egernsund REFRIGERATOR
US4630671A (en) * 1985-02-12 1986-12-23 Victor Sherman Lunch box

Also Published As

Publication number Publication date
WO1993012700A1 (en) 1993-07-08
US4892225A (en) 1990-01-09
DE3607533A1 (en) 1986-10-02
ES2019312B3 (en) 1991-06-16
ATE56350T1 (en) 1990-09-15
EP0236873A1 (en) 1987-09-16
DE3607533C2 (en) 1987-05-21

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