US105823A - John a - Google Patents

Description

.J. A. MQOLELLAND.

,PRpcEss 0]? GOATING OBJECTS WITH GOLLO'DION AND ITS qoMPoUNDs.

1m 105,823. Patented July 26,1870.

A my THE Noam: PETERS coy. FHOTO-LITNQ, WASHINGTON; u. c.

agate-at dtfljiire.

JOHN A. MCOLELLAND, or LOUISVILLE, KENTUCKY.

Letters Patent N 105,823, dated July 26, 1870; antedated J uly 22, 1870.

IMPROVED rnoc'n'ss 30R coa'r'me censors WITH connomon AND ITS COMPOUNDS,

The Schedule referred to in these Letters Patent and making part of the same To allwhom it may concern Be a known thatl, JOHN A. Montana-AND, of

Louisville, in the-county of Jelferson and State of Kentucky, have invented a new and improved Pro-J cess for Coating Objects with Gollodion and its Com- :pounds; and I do hereby declare that the following is a fully clear and exact description thereof, reference being had to the'accompanying drawing making part of this specification, in which- Figure 1 is a perspective view, showing one form of mold adapted for use in coating handles applied to a mixing machine.

Figure 2is a sectional view, showing another form of mold adapted for coating cylindrical objects- Figure 3 is a modification of fig. 2, adapted for applying the coating to flat plates or sheets.

Figure dis a sectional view of aim-instrument having its handle coated.

Similar letters of reference indicate corresponding parts in the several figures.

y The object of this invention is to coat or cover the surfaces of various objects with collodion, or with compounds contain ng collodion, in.more or less quantities.

I am aware that billiard-balls, knife-handles, and other objects "have been coated with collodiou by a dipping process, and afterward subjected to heat and pressure for the purpose, as has been alleged, of expelling the air-bubbles and condensing the coating. I do not, therefore, claim this process of coating.

The nature of my inven tion consists in treating collodion, or collodion mixed with other substances, so as to deprive itof air-bubbles before it is applied to the article to be coated, and then molding this compound upon the article, so as to obtain a coating of any required thickness, at one operation, as will be hereinafter explained.

, To enable others skilled in theart tounderst-and my invention, I will describe the best means'known to me for carrying it into effect. V

For the purpose of preparing collodiou, or the compounds containing collodion, I employ a mill or mix- -ing-machine, constructed substantially as described in an application for a patent bearing even date with this, and marked Case A.

In fig. 1 of the accompanying drawing- A 'A"'1"epresenttwo vessels, in which work up and down pistons B B, and which communicate with each other through fine perforations a.

Thcfiber or woody matter, which has'becn treated with nitric and sulphuric acids to render it soluble, is

put into "one of said vessels, beneath the piston therein, and to this substancei's added'a suitable quantit of ether or other solvent.

The discharge-orifice a, leading from the vessel A,

is then tightly shut, and after all the airhas been exfrom one vessel into the other through thefine passages a, thereby intimately mixing the substances free from air.

If desirable, resins, balsams, gums, oils, nitro-glucose, or other substances may be added in anysuitable proportions, and intimately mixed with the collodion; and if it is desired to use coloring matter, this may be added to the compound and blended. with it in the mixing-vessels.

Having thus prepared the substance or coui pound which is, to be used for coating objects, I adjust, within a suitable flask or mold, the object to be coated, and after applying the same to the discharge-orifice c of vessel A, as shown in fig. 1, the substance is forced into this flask or mbld, around the object therein, by holding piston B down, and applying pressure to piston B.

The drawing represents a flask adapted for coating handles of instruments; also a device for applying the coating to cylindrical objects; also adeviee for applying the coating to flat surfaces, but Ishall not-confine myself to these devices, as a variety of molds or flasks "may be adopted, according to the form or character of The handle of the instrument is centered in its flask by a spider, e, at one end, and by a contraction of the flask at the other end.

In fig. 2 another device is shown, adapted more es pecially for applying the coating to cylindrical objects.

. This device consists of a case, G, of cylindrical shape,

inclosing a circular perforated shell, G, which latter forms in the case G an annular space, 8, and a central chamber, P.

The nozzle g, formed on case G, is received by and attaches the device to the discharge-nozzle b of mixing-vessel A.

Passages 'are made centrally through the ends or heads of the case G, one of which, 0, is tapering, and adapted for spreading the coating evenly upon the object while passing through the chamber P.

The perforations i, made through the shell G, may be gradually increased in size as they leave the point of entrance of nozzleg, for'the purpose of having the coating substance uniformly pressed and fedtow'ard the center of the chamber P,'all around the same.

The thing to be coated is "forced slowly through the chamber P, and as it leaves this chamber, the collararound passage 0 will spread the coating substance evenly upon it, and keep back all the surplus quantity of this substance.

In fig. 3, I have represented a device which is con-,

structed substantially like that just described, with the exception that this device is flattened, and thus adapted for spreading the coating substance upon one or both sides of flat plates or sheets of rigid or flexible material, by drawing the same through the device while tl1e. coating substance is being forced into it under pressure.

If desirable, the surfaces of objects to be coated may be primed with a thin solution of any adhesive cement, such as shellac, varnish, and the like, but for cylindrical or other objects which are to be completely encirc ed by the collodion, such as the handles of instruments, ba1ls,'and the like, a previous preparation of their surfaces will not be necessary, for the reason that the'collodion will contract and hug tightly the object. 4

The coated objects may be turned finished by polishing in any desirable manner.

It will be seen from the above description that I am enabled, by a simple and rapid process, and at one operation, to apply a coating of collodion, or of compounds containing collodion, of any required thickness to the surfaces of various wares or objects.

Having described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

The process for coating the surfaces of objects with collodion, or compounds containing collodion, substantially as described.

J. A. MoOLELLAND. Witnesses:

J ULIUS Hmscn, E. W. ANDERSON.

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