US1931053A - Freezing tray - Google Patents

Description

Oct. 17, 1933. Q BERKELEY 1,931,053

FREE Z I NG TRAY Filed Dec. 21, 1931 gmcmtoz Patented Oct. 17, 1933 FREEZING TRAY Harrison Berkeley, Dayton, Ohio, assignor to The Inland Manufacturing Company, Dayton, Ohio, a corporation of Delaware Application December 21, 1931 Serial No. 582,349

Claims.

This invention relates to freezing trays especially such as are used for freezing ice blocks in mechanical refrigerators.

One piece flexible non-metallic freezing trays 5 are now well known and in general use. The chief advantage of such flexible non-metallic trays lies in the fact that the frozen ice blocks may be easily removed therefrom by flexing the tray and without melting the ice free therefrom. However,

a serious disadvantage of such non-metallic trays lies in the fact that the efliciency and rapidity of freezing is decreased due to the relatively poor heat conductivity of the non-metallic materials, such as flexible rubber, of which such trays are made. Now the object of this invention is to provide a freezing tray having all the advantages of easy removal of the frozen ice blocks inherent in the present non-metallic flexible trays and at the same time having the advantage of rapid freezing due to what is in effect a removable thin metal bottom for a flexible non-metallic tray.

Another object is to provide such a tray having a very easily handled and economically made structure.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein'a preferred embodiment of one form of the present invention is clearly shown.

In the drawing: 7

Fig. 1 is a side view of a flexible rubber freezing container and the metal cover plate therefore in spaced relation, showing how the cover plate is simply set upon the container after it is filled 35 with water.

Fig. 2 is a plan view of the container and metal plate in inverted or freezing position.

Fig. 3 is in part a side elevation and in part a section taken on line 3-3 of Fig. 2. I

Fig. 4 is a transverse section taken on line 44 of Fig. 3.

Similar reference characters refer to similar.

parts throughout the several views.

Numeral 10 designates a molded one-piece flexible rubber container having partitions 11 therein which divide up the space into a plurality of icepockets 12 to form ice blocks of any desired or suitable size. Container 10 may be made from any suitable flexible non-metallic material capal ble of suflicient flexing or distortion to remove the iceblocks therefrom but soft high grade flexible rubber has been found to be the most satisfactory to date. The side and end, walls 13 and 14 of container 10 are preferably provided with an outi wardly flaring flexible flange 15 which extends REISSUED continuously all around the periphery of said container 10 in the same plane. When the container 10 is filled level full with water and the metal cover plate 20 is set thereupon, as indicated in Fig. 1, the peripheral flexible flange 15 will seat directly upon the fiat plate 20 with a neat fit. This cover plate 20 is preferably provided with a slightly raised marginal edge 21, which in the form shown is provided by a reinforcing resilient wire 22 about which the raised edge 21 is 5 curled, as clearly illustrated. This wire 22 preferably extends at one end to form the handle 23 by means of which the assembly may be more easily handled when the container 10 is filled with water.

After container 10 is filled with water and the cover plate 20 set thereupon, this assembly is inverted as a unit to the position clearly shown in Figs. 3 and 4. The water in container 10 will then ordinarily leak out slowly until it forms a water seal at 30 all around the container 10 between the flange 15 thereof and the raised margin 21 of pan 20. Fig. 4 clearly shows how the atmospheric pressure acting downward as illustrated by arrows 31 will positively prevent further leakage of water from container 10 as soon as the water seal 30 covers the joint between flange 15 and the bottom plate 20. Only a very thin film of water willdo this since such a water film will prevent air bubbles entering the container under flange 15, and if no air bubbles enter the water will be retained up within container 10 against gravity action by the partial vacuum existing in the pockets 12 within container 10. If the flange 15 is molded with a veryv smooth and accurate plane surface the raised margin 21 of plate 20 will be unnecessary since the surface tension of the film of water between flange 15 and plate 20 will be suflicient to prevent air entering container 10 under the flange 15' and thus the water is prevented from leaking out due to the partial vacuum occurring within container 10 as soon as the water begins to leak out.

The inverted assembly shown in Figs. 2, 3, and 4 is inserted within a freezing chamber of a refrigerator, preferably resting directly upon a refrigerated metal shelf or support. Heat is rapidly conducted from the water through the thin metal bottom 20 which ordinarily rests directly upon a refrigerated metal support. Thus this invention provides in effect a flexible non-metallic container 10 having a metal bottom which greatly enhances the rapid freezing of the water. The thin water seal 30 freezes very quickly and thereafter if desired for any reason the assembly may 110 be removed and handledquite carelessly without danger of the water in container leaking out or the plate 20 becoming separated therefrom.

After 'the water is completely frozen the assembly is removed as a unit and the flexible metal plate 20 is easily stripped from its frozen bond with the ice in container 10 by lifting up on handle 23 or otherwise bending or twisting the flexible plate 20, the ice blocks remaining within the pockets 12. A handle 16 is molded integrally upon container 10 to facilitate handling of the container and also serves as a convenient means to hold said container 10 when the metal plate 20 is stripped therefrom as described in the preceding sentence. After removal of plate 20 the ice blocks are easily removed from the flexible container 10 either one or several at a time or all atonce, simply by flexing said container in any desired manner. a

This invention therefore provides what is in effect a quickly and simply removable flexible cover plate for a flexible non-metallic freezing tray. No thawing of the frozen bond between the ice and its confining parts is necessary.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A freezing device comprising: a flexible nonmetallic container having ice pockets therein and adapted to be filled with water, and a flexible metal plate upon which said flexible container rests flatly in inverted position, and means providing a water seal around the peripheral lower edge of said container whereby water will be held within said container against gravity action by atmospheric pressure.

2. A freezing device comprising a container having ice pockets therein and adapted to be filled with water, a flexible metal plate upon which said container rests in inverted position, and means providing a water seal around the peripheral lower edge of said container whereby water will be held up within said container against gravity action by atmospheric pressure.

3. A freezing device comprising: a flexible nonmetallic container having ice pockets therein and adapted to be filled with water, a flexible metal cover plate upon which said container rests in inverted .position in such manner that water will be retained within said container against gravity action until the water is frozen, saidmetal plate being capable of being stripped from its frozen bond with said container and its contents by flexing same to facilitate the removal of the ice.

4. A freezing tray comprising: a one piece flexible rubber container and a flexible metal cover plate fitting flatly upon the peripheral edges of said container, said container being adapted to be filled with water, the metal cover plate applied thereto and the assembly then inverted dur ing the freezing of the water, whereby rapidity of the freezing of the water in said container is enhanced by the transfer of heat from said water through said metal cover plate.

5. A freezing device comprising: an open faced flexible non-metallic container adapted to be filled with water and having a continuous flat peripheral edge, and a metal plate upon which said flat peripheral edge fits in such manner that the water will be retained up within said container at the joint between said peripheral edge and said plate when said container and plate are inverted in fitted together relation.

HARRISON C. BERKELEY.

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