US1090904A - Method of manufacturing raw plate-glass. - Google Patents

Description

M. BIGHEROUX. METHOD 0F MANUFACTURING RAW PLATE GLASS. APPLICATION FILED Jmmzz, 1910.

150909O4- Patented Mar. 24E, 1.910.L

Y To all whom t may concern.'

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lldlerzoffenrath Rhineland German f have vray the lengths of the severed sheets may be 'raw glass is insured, notwithstanding the rrp sra MX BICHEROUX, OIE HERZOGENRATH,

srlnennenes narrante onirica.

-GERMANY, SSIGNR T0 HERZOGENRATHER 'UND SPIEGEL-FABRIK BC-EROUX, LAMBOT'IE SZ CIE., GESELL-- SCHAIET MIT JBESCHRANKTIER HAETUNG, F HERZOGENRATH, GERMANY.

METHOD 0F MANUFACTURING RAVI PLATE-GLASS.

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Be it known that l, MAX Bienenoux, a subJect of the King of Belgnini, residing at invented an Improved Method of Manufacturing Raw PlateGlass, of which the -foilovving is a specification.

lThis. invention relates"to` a novel method of manufacturing raw plate glass, and more particularly to a method of ina-nufacturihg thin raw plate glass 'from a large pour of molten glass.

The essential feature of this invention consists in rolling out said'pour into a ooherent plate from which a plurality of sheets is consecutivelyVY severed in the rear of the roll, and'consecutively pushing said severed sheets from the relatively -cold surface of the pouring table on to the hot base of an annealing chamber Whilethe rolling out of the molten mass is still proceeding. In this so chosen 'that the temperature differences between the iirst and lastrolled part of each of said sheets are such as to'avoid all danger of cracking and the like.-

ln the accompanying drawing-Figure l is a side view of an apparatus suitable for carrying my invention into eiect, Fig. 2 a plan thereof, and Fien. 3 an enlarged cross section through the adjoining sides or a pair of tables. l

As shown in Figs. l and 2, there are eniployed a number of small pouring; tables a, c1, a2, i1-ox which are placed behind each other with narrow intervening gaps, so that the tables may expand independently from each other and may be separately cooled il? desired. The intervals between. the several tables accommodate bars .ICL-b1, b2, 3, which are provided with beveled faces c resting against the chamfered edges of the tables (Fig. 3). The compound table constructed as described can he lengtdiened to the extent desired and owing to its subdivisions7 possesses such a degreeoi stability that the production of uniformly lheavy heat eminating from thejinolten ing continuous manufacture.

The entire dough like contentent the glassV glass dur- Speciicaton of Letters atent. repuestas inea June ze, lem.

pot are poured uponftheiirst ta-ble c in front4 of the roller d. By nieansoi tlfevroller, l

lljatented lilla.

Serial No. 568,260.

section possesses the size or' a single table a-ax.' The severed sections are then con-` secutively pusliedironithe several tables to the annealing furnace,

say in the direction' eel, e2, e3, cX by applying u pressure to each or said sections on one of its longitudinal edges. This removal takes place Whiie the" rolling out of the molten pour is still proceeding.

Therszeo the several pouring tables as well as the number oi such tables used, are

.dependent upon the particular conditions present.

The invention possesses a number of advantages aside from those alluded to.

Raw plateglass can only he obtainedl from glasspots soas`.toinsure the desirable purity oi^` the glass, that is to say invariably a singie sheet of glnss\is obtained ironia single Lglass-pot. As thevcost of the manufacture diminishes quite considerably with the size of the glass-pot, has beconiea rule to increase such size, in other words to produce sheets of raw glass lof an ever increasing size. However the limit has already been attained for the maxi num size of 'from 30 to 35 square meters 0..l the glass plate. lt would not bepossihle further to extend the rolling process. since there would be danger that the part first rolled would crack before j the sheet could he inoved into the annealing oven. -lndeech it is, this part frequently cracks in the annealing oven or during the grinding operation. Aside. from the above objection, another,diiiicuity"is that the glass plate which is moved into; the annealing oven, with its last formed end still iii a soft state, will under its increasing Weight. he apt to jam or' swell, as is indeed the case. l `urther1nore, the cooling of the glass plates -still further increased.

withv the present sies is already attended, with serious dilliculty and inconvenience, which would render the process practically impossible if the sine of the plates were to be It should also be noted. that for a further extension of the surface of the sheet of glass, no construction of a single piece po1.|ring-table would prove sullieicntly stable to insure a uniform thickness of the glass. lt has already become a rule to roll on each table at most only 6-8 plates, in order to avoid too great deformations or to c'ool the table with water. The new method avoids all these defects and enables pots of any' desired capacity to be used for the production of plates of any desired sizes, said plates being during the rolling operation subdivided 'into a number of units,

of which each unit may on account of its' small size be treated by itself, so as to overcome the above difficulties. :no also, las already stated, the new process permits the formation of raw plate glass of any thinness desired for grinding thin plate glass.

The advantage obtained by the employment of large glass-pots is accompanied by a considerable saving in raw material and an essential reduction in the cost 'of grin-ding, not to mention the fact that the annealing of the small pieces, of crude plate glass produced by the new method in a single rolling operation is cheaper, more even and less likely to" produce cracks than the annealing of a single undivided large plate.

claim:

l. The method of manufacturing raw plate glass which consists in pouring out a molten massvof'glass upon a flat and relatively cool table rolling out a coherent plate -from said molten mass, consecutively severing a -plurality of sheets from said coherent late in the rear of the line of rolling, an consecutively removing said severed sheetsfrom the relatively cool surface on to a hot surface While the rolling out of the molten mass is still proceeding.

2.. The method of manufacturing raw plate glass which consists in pouring out a molten `mass of glass upon a Hat and relatively cool table,'rolling out a coherent plate therefrom progressively from one end Lof the flat surface to the other, consecutively severing a .plurality of sheets from said coherent plate in the rear of the line of rolling and pushing the severed sheets with a pressure applied on the longitudinal edge of the sheet in a direction transverse to the direction of rolling and over said cool surface on to a hot surface while said rolling of the molten mas's is proceeding.

, MAX BICHEROUX.

Witnesses L HENRY QUADFLIEG, GUSTAV WEGMANN.

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