US1801314A - Sheet-glass-surfacing apparatus - Google Patents

Description

April 21, 1931. J. E. LANDOLT SHEET GLASS SURFACING APPARATUS Filed June 25, 1927 gwpentov Johh E. Lafido/Z l at'enied Apr. 21, 1931 UNITED STATES PATENT OFFICE JOHN E. LANDOLT, OF TOLEDO, OHIO, ASSIGNOB TO LIBBEY-OWENS-FORD GLASS COM- PANY, F TOLEDO, OHIO, A CORPORATION OF OHIO SHEET-GLASS-SUBFACING APPARATUS Application filed June 25,

o'means for supporting a sheet or sheets of glass and rotating the same during the polishing operation, polishing members adapted to 'contact with said sheet, and means for discharging a fluid upon the sheet, and for instantaneouslycutting off said discharge when desired.

Another object is to provide in sheet glass surfacing apparatus and particularly a polishing machine, a plurality of conduits auassociated with a single header, which in turn is connected to a suitable source of liquid supply, said conduits being inclined downwardly toward the header so that when the fluid is turned ofi the pipes will dram back through said header.

Other objects and advantages of the invention will become more apparent during the course of the following description when taken in connection with the accompanying ea drawings.

In the drawings wherein like numerals are employed to designate like parts throughout the same,

Fig. 1 is an elevation of a form of surfacing machine illustrating my invention in use,

and r Fig. 2 is a plan view thereof, illustrating diagrammatically the arrangement of conduit-s used.

1 Although the invention is not necessarily restricted for use in connection with any particular type of glass surfacing machine, it has been designed primarily for that type of machine where the sheet or sheets of glass are 45 "supported upon a rotating table in a manner thatsurfacing elements may rest upon said sheet of glass and caused to rotate by reason of frictional contact therewith.

In the drawings, the numeral 5 designates a polishing machine in its entirety which com- 1927. Serial No. 201,343.

prises a frame 6, a rotatable table 7 adapted to support the sheet of glass 8 to be surfaced, and a plurality of surfacing units 9. In the drawings the surfacing elements are in the form of polishing members which may be belt covered blocks 10.

In the production of plate glass, the glass blank is usually first ground by means of suitable abrasive orabrasives, after which it is subjected to a polishing action. The polishing is usually accomplished by means of a rouge mixture and hot water. In using the machine illustrated, a rouge mixture is usually applied fairly heavy at the beginning of the operation, after which the supply of rouge is tapered off and hot water is supplied.

To insure that the supply of hot water be I cut off instantly when it is desired to no longer furnish the same, I have provided a construction wherein the excess water remaining in the conduits is discharged away from the sheet.

In the drawings the numeral 11 designates a polishing medium supply pipe. As above stated, the polishing medium is usually rouge mixed with water. Connected to the conduit 11 and associated with the machine is a pipe 12. The pipe 12 is adapted to discharge the polishing medium through the end 13 upon the sheet, while a valve 14 controlled by means of the handle 15 is used to control the amount of rouge fed.

A pipe 16 is provided and has preferably hot water or similar fluid circulating therethrough. A header 17 is mounted on the machine and has a plurality of pipes 18 extending therefrom. The header is connected by means of the pipe 19 to the conduit 16, a valve 20 being arranged in said line 19 to control the flow to the header. A valve 21 is also arranged in each one of the lines 18.

A discharge pipe 22 and valve 23 is connected to the header 17 as shown. The header 17 is slanted downwardly toward the discharge pipe 22, while the pipes 18 are in turn inclined toward the header, except of course for the discharge ends 2 1. A supplementary pipe 25 is also connected to, the header and to the rouge line 11,.the pipe 25 being controlled byimeans of the valve 26.

'add a little hot Water, and to do this the alve 25 i clo ed and the ve 201is ope ed t0 thedesired t, contr lling the n dividual valves 21, the discharge of hot water can be accurately controlled, When it is de= siredto stop using the water, the valve 20 is closed and the valve 23 is opened. Ina.- mediately, due to the inclination of the header and the associated pipes, the excess Water will flow through the discharge pipe 22 into a-gutter which is positioned beneath the table, but which is not illustrated for thepurpose "of-clearness." r

In some instances, it may be desirable to discharge polishing medium through the pipes 24., in which case the valve 26 may be opened which will permit the rouge to flow from the pipe. 11 through the pipes 24;.

It is to be understood that the form of the invention herewith shown and described is tobe taken as the preferred embodiment of the same, and that various changes. in the shape, size and arrangement of parts may. be resorted to without departing from'the spirit of the invention or the scope of the subjoined claims. a Y

Claims:

1 In sheet glass surfacing apparatus,

means for supplying polishing medium to the sheet of glass to be surfaced, said means comprising a main conduit containing a polishing medium, an inclined header,ineans connecting the main conduit and header, a valve in said connecting means for controlling'the supply of polishing-medium to the sheet of glass to'be surfaced, a plurality of pipes connected to the header and inclining l upwardly away therefrom, and a valve con trolled drain'pipe connected to the lower end 7 of said header adapted to drain the plurality of'pipes and the inclined header when the valve in said'.main conduit, and header connesting means is closed. i

2. In apparatus for supplying a polishing medium to a glass sheet to be surfaced,, a plurality of fixed conduits terminating in, dis- 7 charge spouts positioned vabove the glass sheet, means for supplying a polishing medium to the conduits whereby it is discharged from said spouts onto said sheet, said conduits inclining downwardly away from the discharge spouts, and a common drain pipe connected with the lower ends of said conduits remote from said spouts for draining the conduits when the supply of polishing medium thereto is shut off;- I i '3. In apparatus forsupplying a polishing -medlum to a glass sheet to be surfaced, an in clined header, a plurality of pipes connected thereto and inclining upwardly away therefrom, said pipes terminating in discharge nozzles positioned above the sheet, means for supplying a polishing medium to the header and pipes whereby thesame is discharged from said nozzles onto said sheet, vand a drain pipe connected to the lower end of said header for draining said header and pipes when the supply of polishing medium there to is shut off;

I 4}. In appara-tus for supplying a polishing medium to a glass sheet to be surfaced, a main conduit adapted to contain the polishing medium, an inclinedheader, a connection between the main conduit and header; a valve in said connection for controlling the supply of polishing'rmedium to said header,

a second main conduit adapted to contain water, a connection between the second conduit and headen a valve in said last named connection for controllingthe supply of Water to said header, aplurality of pipes con.- nected to said header and inclining upward ly away therefrom, said pipes'termi-nating in discharge nozzles positioned-above the glass sheet to be surfaced for discharging the polishing medium and water thereupon,"and a valve controlled drain pipe connected to-the lower end of said header for draining the header and pipes when the valves in the connections between the header and mainconduits are closed, I

j Signed at Toledo,- in the county of Lucas and State of Ohio, this :231'd day of June,

LANDOLT.

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