US1679419A - Heat-insulating lid - Google Patents

Description

H. D. GEYE R HEAT INSULATING LID Filed Feb. 19, 1927 Patented Aug. 7, 1928.

HARVEY D. GEYEB,

COMPANY, OF DAYTON, OHIO,

OF DAYTON, OHIO, ASSIGNOR TO PATENT OFFICE.

THE INLAND MANUFACTURING A CORPORATION OF DELAWARE.

HEAT-INSULATING LID.

Application filed February This invention relates to removable lids, and particularly to lids for closing the openings in the top of ice cream cabinets provided to afford access to the ice cream cans therebelow.

In applicants co-pending application, Serial No. 154,910, filed December 15. 1926, there is disclosed a form of lid having a molded composition cupped bottom plate, a sheet metal top plate, and a separately molded hand-knob with a molded-in metal insert to secure the top and bottom members together. The present invention presents advantages over the former construction in the following: There is only one molded piece instead 0 two; the sheet metal bottom plate which is ordinarily made of Monel metal, is smaller and hence less expensive in material used; also this bottom plate is of such size that it can be made from the scrap pieces of Monel metal which are cut out to form the holes in cabinets having Monel metal covered tops; the soft rubber gasket may be easily applied or removed simply by stretching it slightly and snappin it into its groove and hence replace- .ment of these gaskets, which is necessary from time to time is a much more simple matter than in t e former construction; the periphery of the sheet metal plate has a fit upon the periphery of the molded d a tight joint is thereby made which prevents moisture from entering the heat insulation material in the lid and bad odors escaping therefrom.

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

In the drawings:

Fig. 1 is in part a side elevation and in part a. vertical section through a lid for an ice cream cabinet made norm-ding to this invention; and

Fi 2 is a bottom view of the molded mem er of the lid with the rubber gasket removed.

19, 1927. Serial No. 169,668.

Similar reference characters refer to similar parts in the several views.

Referring to the drawings, 10 designates the molded top member or main body of the lid which has a depending annular flange 11 molded integrally therewith. Also molded integrally therewitn is the central handknob 12 and a central depending projection 13 which preferably extends slightly below the bottom face 14 of flange 11. The interior chamber 15 of member 10 is tilled with a suitable insulating material 16, such as loose ground cork or ground cork board.

The bottom plate 20 is mad from quite heavy sheet metal, preferably Monel metal. These plates 20 are of such size, as clearly indicated in Fig. 1, that they can be made from the round scrap pieces which are cut out of the metal covering of the cabinet top 21 to form the holes into which the lid fits. The bottom plate 20 is provided with a peripheral upstanding flange 22 which telescopes snugly upon the lower end of the molded flange 11 with a tight fit.- Preferably a small shoulder 23 is molded in the tapered exterior surface of flange 11 against which the top edge of the metal flange 22 abuts when the plate 20 is pressed to position on the molded member 10, thus forming a tight and neat joint. A small clearance 2d between the bottom face 14 of flange 11 and the metal plate 20 insures, the desired tight lit at the shoulder 23, as. will be clear from the drawings. The central portion of plate 20 is prei'erably' secured to the bottom face of projection 13. This may be easily done by a counter-sink headed wood screw 25. The metal plate 20 has the Monel metal bent up around the hole for screw 25 so as to form a countersunk recess 26 for the screw head. \Vhen screw 25 is driven home, the countersink 26 of the metal plate .20 is very firmly wedged within the countersink recess in the projection 13, and thus a very tight joint around the screw 25 is obtained. It is desirable that the interior chamber 15 be quite perfectly sealed in order to prevent moisture entering the heat insulating material 16 and causing deterioration thereof and a subsequent escape of bad odors therefrom which would be cream in the concold compartment below. require replacement after a period of, service. This is done. simply by removing the gasket with ones fingers and snapping the new gasket in place.

Preferably the radially projecting flange 35 overlying the gasket 31 is strenghtened and protected by a molded-in channel metal ring 36, preferably rolled up from Monel sheet metal. This sheet metal ring 36 is first. rolled substantially to shape so that it will fit snugly within the mold cavity for the flange 35 when inserted in the mold. No joint is made in the ring where the ends 38 abut in order to permit the ring to expand slightly in diameter to hug the cavity walls when the molded material is forced thereagainst with great pressure in the process of molding the member 10. It is thus seen that the ring 36 is easily and securel molded in place upon the flange 35. If desired, the top portion of ring 36 may have perforated letters 37 or other designs there- These gaskets 30 weight: gilsonite (Utah asphalt) 46% Korite (a bituminous residue of loW meltmg point derived as a by-product of petroleum refining and marketed extensivel b the Standard Oil Co. of Indiana) disintegrated asbestos fiber lSfi/fit; and an inert. filler such as infusorial silica, powdered slate, fine clay, powdered asbestos, or other suitable filler, 23%. These materials a good air seal for the are converted into a substantially homogeneous plastic doughy mass in a suitable heated mixing or kneading machine at a temperature around 385 F. and then the ut in the unheated lid mold of the closed ty pe formednnder a high pressure in the This pressure may range like 3,500 to 10,000 lbs. per is so high that the material claimed in a separate co-pending applicat1on7, Serial No. 169,669, filed February 19, 192

lVhile the form present invention as herein disclosed, constitutes a preferred stood that other forms might be adopted, all coming within the ollow.

What is claimed is as follows:

1. A removable heat insulating lid for a container comprising: a one piece molded composition top member having a hand knob and an annular downwardly extending and an annular groove immediately adJaCent flange, and heat insulatlng material in the chamber formed bemolded material.

4. A removable heat insulating lid for a container comprising: a molded composition top member having a projecting peripheral edge adapted to rest upon the opening in the container Weight of the lid, edge having a channel shaped metal ring enclosing and protecting the same and anchored in place by being closing said peripheral edge and molded in molded in situ in the molded material. place in the molded material, said metal 10 5. A removable heat insulating lid for a ring having perforations therein -fille'd with container comprising: a molded composition the molded material, whereby inlay designs 5 top member having a projecting peripheral are obtained in said metal ring. v

edge adapted to rest upon the opening in In testimony whereof I hereto afiix my the container to support the weight of the signature.

lid, and a channel shaped metal ring en- HARVEY D. GEYER.

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