US1319195A - Edgar h - Google Patents

Description

E. H. WEIL.

TRAY.

APPucATxoN FILED MAY19.1919.

1,319,195. Patented om.. 21,1919.

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EDGAR ii. wEiL, yor CLEvELAiv-ii, gi-iio, Assieivon To TiiEvirREos ENAMELING COMPANY, or CLEVELAND, omo, A CORPCEATICNCF o Hr'o.

TRAY.

Specification of Letters Patent.

Patenteaoct. 21, 1919.

Application filed May 19, 1919. Serial No. 298,311.

whereby treatment of chemicalsandmate-V rials may be effected economically'and uniformly. i

Another object of the invention `is 'to provide a metallic tray having a perforated enameled bottom whereby the 'chemicals and materials are economically and uniformly treated and at the same time prevented from contacting with the metal of the tray.

Another objectY of the invention is -to pro- 4vide a metallic drying tray having a bottom formed with a plurality of openings y the walls of which extend downwardly' below the plane lof the bottom to prevent contact of the material on the tray with the peripheral edges of the opening A 'further object o'f the invention yis to provide an enameled drying tray formed with a plurality of openings whose wallsVV extend downwardly below the plane of the tray toposition the free peripheral edge of such openings out of contact with the m-aterials placed on the tray.

Other objects of the invention will be apparent to those skilled in the art to which my invention relates from the following description taken. in connection with the accompanying drawing.

For the purpose of illustration, I have, in the accompanyingdrawing shown and herein described one form of apparatus embodying my invention.

Figure 1, is a top plan view of a tray, embodying my invention, a portion of tray being broken away.

Fig. 2, is a section of the line 2 2 of Fig. 1.

Fig. 3, is the elevation of one end of the tray looking in the direction of the arrows 3 3.

Fig. 4, is a fragmentary view enlarged takeny on line 2 2 of Fig. 1.

Fig. 5, is a fragmentary view of a slightly modified tray having a larger number of openings than-the tray shown in Fig. 1.

In the drawings, 1 indicates as an entirety a tray having abottom la. The tray maybe and preferably is provided with one or more side walls lbthe vupper-edges of which may be rolled'over to -strengthen the side walls andl thek tray as an'entirety. and avoid the formationrof rough edges. For sake of economy'and convenience, the bottom V1aL and sidewalls 1b are formed from a single metallic'sheet of suitable shape and thickness, whichv is bent-1in any well known manner to .form the `sidel walls and rolled edges. The tray may be of'anydesired size and shape. f f

' 2 indicates'a plurality ofopenings formed in thebottom la. The-openings 2f'may be of Vany desired shape and size, andthere may be a larger or smaller num-ber of open-5 ings 2, depending upon thercharacterr andnature of the materials tobesupported on the tray for'drying ortreatrrrent. Further-` more, theV openings 2 maybe arranged in" any order desired," they are preferably'unithe opposite edges yor lside walls 1b" in order that luniform drying, or` treatment maybe effected in the lmost 'eficie'ntmannen metal constituting the walls of each opening 2 is lbent downwardlyand inwardly ortoward the center of opening,fa's shown at 2a, so as to dispose the free peripheral edge 2b of the opening below the plane of the bottom 11.'v f

3 indicates a suitable coating for the upper surfacesof'the bottom 1a and walls 2a of the openings 2. The coating 3 is formed of a .chemical resisting vmaterial, preferably vitreous enamel. The purpose of the enamel coat is to prevent contact of the chemical materials with the 'metal constituting the walls of the tray and particularly the tray bottom on which the material is placed.

While it is only necessary, in carrying out my invention, to enamel the upper surface of The y the tray bottom, it is quite advantageous for 'iio trated a tray which has been enameled in this way. As shown, the coat 3 covers all surfaces of the bottom la, walls 2a and side walls 1b. The coat 3 therefore not'only prevents contact of the chemical materials with the metal from which the tray is formed, Y

but also lprotects such metal from the heat and other elements used for or in connection with the treatment or drying of the materials on the tray.

The'tray embodying my invention is particularly adapted for use in drying apparatuses of the character in which the trays are removably supported in superposed series, one above the other and spaced from each other to permit the circulation of the drying medium above and below each tray. As all surfaces of the .tray are enameled, it is well adapted for various types of drying apparatus including those in which moisture or vapor is used to facilitate drying.

Heretofore, it has not been possible to use metal Y trays and particularly metal trays having perforated bottoms because the metal or ingredients therein would affect the chemical 'materials in various ways, chemically and otherwise, depending upon the nature and character of the materials being treated. I have discovered that metal trays can be advantageously used by enameling, with vitreous enamel, the surface of the tray bottoms and hence prevent contact of the chemicals with the metal of which the tray bottoms are constructed.

It is well known, in enameling metal plates and metallic articles, that exposed free edges ofthe metal cannot, practically or commercially, be enameled completely so as to entirely'and permanently cover such edges. Accordingly, in carrying out my invention, I countersink the openings 2 in the tray bottom; that is, I bend or curve the metal constituting the walls of each opening downwardly and inwardly, as shown vat 2", so that the free edge or peripheral edge of the metal, which may be more or less exposed, is entirely below the plane ofthe tray bottom and therefore is out of contact with the materials being treated on the tray.

An enameled metallic tray embodying my invention has several important advantages,

among which may be mentioned, to--\vit, cheapness of construction, durability, elimination of repairs and rusting, and fire-resisting characteristics. In connection with this last-mentioned advantage, attention may be Called to the fact that many chemical plants in operation today are equipped with apparatus all of which are made of fire-proof niaterials except the drying trays; by using my invention in such plants, all equipment therein can be made entirely fire-proof.

In carrying out my` invention I use a tray provided with metallic perforated bottom which enables me to secure in an economical and eilicient manner treatment of the materials, particularly where heat or heat and moisture is or are used for drying purposes. By providing the bottom with suitable sized openings, equally spaced from each other, the treatment is effected uniformly and quickly. From the foregoing description it will be seen that by enameling the tray bottom and countersinking the perforations thereof, I am enabled to produce a very cheap, but durable tray of fire-proof material and at the same time adequately prevent contact of the material with the metal constituting the wall or Walls of the tray. To those skilled in the art of making paratus of the class described, many alterations in construction and widely differing embodiments and applications of my invention kwill suggest themselves, without departing from the spirit and scope thereof. My disclosures and description herein are purely illustrative and lare not intended to be in any sense limiting.

What I claim is:

An articleof manufacture comprising a metallic trayhavingy an enameled bottom on which chemicals fand4 other materials are adapted to be disposed', said bottom being formed with a vplurality of relatively small openings the walls of which are bent downwardly to dispose the free or exposed edge of the metal below the plane of said bottom.

In testimony whereof I aliiX my signature.

EDGAR IVEIL.

lVitness GEORGE H. Hays.

copies of thil'upatetvmay be obtained for ve cents each, by'addressing the Commissioner of :Patentsv 'Washingtom D. C.

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