US995998A - Apparatus for coating objects with subdivided material. - Google Patents

Description

' F. P. BRADLEY. v APPARATUS FOR COATING OBJECTS WITH SUBDIVIDED MATERIAL.

APPLIOA'I'IQH FILED 5111631911.

' Eatentmd June 20,1911.

PATENT OFFICE.

FFANKLIN-F. mmnmm orcmceeo, ILLINOIS, ASSIGNOR. 'ro ,IBRADLEY AND vnoo-' 1 MANCOMPANYQOEOHIGAGQJILLINOIS, A CORPORATION or ILLINOIS.

\ useful li'nprovexnent 'in Apparatus foriCOab;

APPARATUS, r03 Cha m-wens wIrrH SUBDIVIDECD MATERIAL.-

: }spei e ti n,dimmers Patent. Patented June 25, 1911.) naiea'ion'a'a Marehi'G, 1911. SeriaINo. 514,879.

To all whom it mayronc'rii;

LEY, citizen ofthe United, States, residing at Ch cago, in the-county'of Cook and State of Illlnois, have invented a certain new and i'ngjQbjects with. subdivided Material, of

part ofthis specification.

which the followingisa full, clear, concise,

andlexact; description, reference being had t6 the accompanying drawings,; forming a nvention relates to apparatus forco at ing obj ects with subdivided material.

to the'coating of objects withsubdivided material as follows Serial No. 543,215, filed February 11', 1910; Serial No. 550,315, filed March-18, 191 Serial No. 569,428, filed January-18, 1911 ;Serial No.

Junef 29,1910; Serial No. 58 83730,- .filed October 24, 1910,; SerialNo,= 588.731, filed October 24, 1910; Serial No.'. 603,251,' filed January 20, 191 'Serial'No; 609,203, fired February 17, 1911} Serial No. 609,204, fi led February 17,1911; SeriaLNo. 611,042,'filed February 27,1911; and Serial No. 617,149,

' filedMarch 27, 1911.

- invention has purposes and advantages which are. ,desirably' realized in one striicture, but to the, accomplishment of which by one structure I ,donotwish ,to be limited. 7

invent i n for one purpose the provision f of. an improved apparat us from which theHu'nd-u'e escape Ipf the-subdivided material is prevented while the apparatus is operation, whereby the operation of the apparatus need not be stopped or mate-.

rially modified in order, to withdraw the coated objects from the apparatus and-t0 substitute therefor other objects to be coated. This and other "features o f iny, in

vention will be fully explained by reference to the accompanying drawing showing the preferred embodiment of the invention, and in which- Figure 1 is a sectional plan View otthe preferred form of apparatus; Fig. 1s a sectional elevation on line 2 2 of F1g. 1; Fig. 3 is a diagrammatic view illustrat ng the operationof the apparatus.

Like'parts are indicated by s1m1lar characters of referencethroughout the difierent figures. I employ a receptacle 0 provlded with an Iliave hitherto filed applications relatingi opening I), through which the objects to be coated-may .be passed into the receptacle interior. The objectc-illu'strated is a metal] bedstead part that is placed up'on aiw'heeled truck. d in order that itmay bemoved into and out of the'recept-acle; 'Some means is employedfor effecting the 'forced circulation of, air lwtithin the receptacle, the particr1Iar.,-Ineans illustrated beinga fan e :which is constructed to'causethe air where it has fullest flow to follow a circuit or' stream within the receptacle. The fan is provided" with bladesfth at are shaped or disposed cart as component partsof a screw'm order that the fan 'may cause an to flow in a stream; Irrespective of the location of the air circulating mechanism, I, desirably employ a partition-or partitions f within the receptacle whereby the course -followed by the air circulating within the receptacle'may'be defined owing to the division of the receptacle interior into channels, in one of which channels the objects tobe coated are to bereceived. Where the fan is'disposed upon the receptacle interior, it is preferably located at the rear part of" the receptacle and is located in a wall 9 unitingthe rearvertical margins of the par? titions fiby which arrangementcommunication between the space intervening between the partitions f and t-he spacesintervening between said partitions and the side walls of the receptacle is afiorded at the rear of] the receptacle'only through the fan space.

Communication between the-spaces intervening between't-he receptacle walls and the partitions f and the space intervening be.- tween said partitions is directly afl'orded at the front, portion ofthe receptacle, and in order the better to define the currents of ,tacle through the space intervening-between thepartitions f and forwardly'through the spaces intervenin betweexi -said partitions and the receptac e, walls, the air Issuing from these latter 'spacesat the forward: ends air circulating within the receptacle. the marginal portions of the entrance opening of the partitions) moving in streams rearwardly toward the fan. i

The subdivided material, such as bronze powder, with which the object is to be coated is admitted to the receptacle interior through a' funnel 7a. The circulating air takes up the bronze powder and carries it to the object 0 to be coated, this object previously having been' provided with suitable adhesive material such as wet varnish having the capacity of retaining'the particles of subdivided material conveyed thereto by the air laden with the same. Deflecting sur-' faces are afforded within the receptacle interior, against which the material-laden air strikes and which take part in directing the air toward the object, and in creating minor currents and eddies for the purpose of more thoroughly conveying the subdivided material to various parts of the object to .be coated therewith. The rear of the receptacle ,is preferably provided with a' plurality of j the air escaping from the rear of the receptacle.

My apparatus, as actually operated in practice, works so well that the opening 6 through which the objects to be coated are inserted need not be provided with a door, as no appreciable or substantial amount of subdivided material finds escape through the opening I) even though the coating operation be at its height. I do not wish to be limited however, to the absence of a -door for the opening 6. While the sheets of muslin or other suitable textile fabric indicated atz' constitute a means for restricting the exit for the air, I do not wish to be limited to such a means which also has the added function of intercepting particles of subdivided material, though I prefer a rest-ricting means having this added characteristic.

I have broadly claimed a process of coating objects with subdivided material in my co-pending application Serial No. (314,001,

filed March 13, 1911.

lVhile I have herein shown and particularly described the preferred embodiment of my invention, I do not wish to be limited to the precise construction shown as changes may readily be made without departing from the spirit of the invention.

Having thus described my invention, I.

claim as new and desire to secure by Letthe' receptacle interior to the external air,

said mechanism operating to draw air from the exterior of the receptacle in a direction from the aforesaid entrance opening toward the aforesaid exit opening, whereby the escape of material-laden air through said entrance opening is materially prevented.

2. Apparatus for coating objects with subdivided material carried by air including a receptacle for the objects having an entrance opening for the objects; and mechanism for effecting the forced passage of air within the receptacle, there being present a restricted opening for the exit of air from the receptacle interior to the external air, said mechanism operating to draw air from the exterior of the receptacle in a. direction from the aforesaid entrance opening toward the aforesaid exit opening, whereby the escape of material-laden air through said entrance opening is materially prevented, there being present means at said restrictedopening for removing subdivided material from the air passing therethrough.

In Witness whereof, I hereunto subscribe my name this fifteenth day of March A. D.,

FRANKLIN F. BRADLEY. Witnesses G. L. CRAGG,

G120. O. Dawson.

Images