US1841660A

US1841660A - Width maintaining means for sheet glass apparatus

Info

Publication number: US1841660A
Application number: US145210A
Authority: US
Inventors: Luke C Mambourg
Original assignee: Libbey Owens Ford Glass Co
Current assignee: Libbey Owens Ford Glass Co
Priority date: 1926-10-30
Filing date: 1926-10-30
Publication date: 1932-01-19
Anticipated expiration: 1949-01-19

Description

Jan. 19, 1932. Q MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS Filed Oct. 30, 1926 3 Sheets-Sheet l gwuento'a Luke 6. Mamba w;

Jm. 19, 1932. L. c. MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS Filed Oct. 50, 1926 a Sheets-Sheet 2 R 3o 5 ,9 i Z 54 54 IBE gwuemioz Luke C. Mamba/lg atbozmg Jan. 19, 1932. L. c. MAMBOURG 1,841,660

WIDTH MAINTAINING MEANS FOR SHEET GLASS APPARATUS p 1926 5Sheets-Sheet 5 Ratented Jan. 19, 1932 tam:

MES

- ent-ea ATENT orFic- Y LUKE; c. MAMBonRe, or Lanoesran, on o', ssrenoza T0 nnzrnyownnsfronn en res s COMPANY, or ronnno, 0310, A CORPORATION or onto WIDTH MAINTAINING eans son SHEET e ss arrena'rns amalgam. filed Gctober 30,1926. Serial no. 145,210.

V The present invention re'latesto sheet glass apparatus, and has more particular reference to ,improvedsmeans for preventing the narrowing of a sheet being drawn. from a mass of molten glass. i

An important object of the invention is to provide improved means at both edges of the sheetbeing .drawn for creating an edge relatjively v scous and suiiiclently strong to prevent narrowing of the sheet. Y

Another nnportantobpct of the invent on is to provide improved width maintaining means of the above character, whereby the thickness of the edges formed on the sheet may be varied as desired and efl'ect1vely,con.-'

" able. member so constructed as to permit the continuous circulation of a cooling medium therethrough.

A still further object of the invention is to provide improved width maintaining means of the above charactenincluding a yoke having a slot for receiving the edge portion of the sheet, and means for increasing or decreasing the width of said slot to'vary the thickness ofthe edge being formed on said sheet.

Still another and important object of the invention to provide improved width main tainingineans of the above character, including a yoke arranged about .each edge of the sheet and provided with spaced yieldable jaws engaging said sheet, means for supporting said yoke, and means for contracting and expanding. saidv jaws whereby .to vary the thickness of the edge being formed on said sheet. 1 r r I Stillfanother object of the invention isthe provision ofmeans for adjustably mounting t1 phoned width maintaining means. Gtherob ects and advantages ofthe inventron will become moreapparent .duringthe Inthedrawings forming apart-of this plication and wherein like numerals are em 7 devices in section,

ployed to designate like parts throughout the same,

I Fig. 1 is atransverse sectional View of sheet glass drawing apparatusshowing associated therewith improved Width maintaining means constructed in accordance with the present invention, 1

. Fig. ,2 is a detail section taken on line 22 of Fig. 1, V

Fig. 3 is a fragmentary view of a portion of the sheet glass drawing apparatus showmg one .of the improved width maintaining Fig. 4 is an inner edge elevation. of one the improved'width maintaining devices.

Fig. 5 is afragmentary sectionof another type of sheet glass drawing apparatus in connection with whichthe present inventionmay be used, v I I F 1g. 6 is a View somewhat similar to Fig. 1

but showing the width maintaining device in tilted position,

7 is a detail top plan view of the means for adjustably supporting the width main' taining device,

F ig. 8 is a top plan'view of a slightlymodilied 1 0111101? the present invention, and

Fig!) is a transverse sectional View taken substantially on line 9.9 of Fig. 8. j

In drawing sheet glass in accordance with the Colburn Patent No. 1,248,809, granted December 4,1917, a draw pot 10, containing a mass ofinolten glass 11, is provided, and a sheet 12 is drawn from the said mass initially in thevertical plane fora-short distanoe after which it is deflected over a bending member '13 into the horizontal lane.

The glass isthen run over a flattening table v V and through an annealing leer which have, not been shown.

In accordance with the Colburn machine, a pair of rotatable knurled rollers areprovided at both edges and on'either side ofthe sheet to form an edge thereon suficiently viscous to prevent narrowing of the sheet.

to. an appreciable extent. It is an of the present invention to substitute for these knurled ro11ers ,a slotted yieldable-member or yoke to obviatethe necessity for the lriv.- ngme h ni m nd t a so utlow the amount of waste that has heretofore been had.

In accordance with the present invention, there is provided at each ed go of the sheet 12 adjacent the source 11, a stationary supporting member or yoke 1 1, comprising

side portions

15 and 16 and a connecting bight por tion 17. he yoke let is supported upon a bar or the like 18 carried by suitable supporting structure 19, which will he more specifically hereinafter described.

Arranged within the stationary yoke 14, is a second yoke or slotted member designated in its entirety by the numeral 20 and comprising spaced

yieldable jaws

21 and 22 and a connecting bight portion 23. The spaced jaws 21 and form slot 35 for receiving the edge portion 12 of the sheet 12.

Carried by the upper and lower ends of the inner yoke 20 are the rearwardly extend ing horizontal ears 24- and 25, pivotally secured to the stationary yoke 14 and supporting bar 18 respectively, by means of

pins

26 and 27. With such a construction as described, it will be seen that the inner yoke or slotted member 20 will be permitted to swing laterally relative to the supporting yoke 14:.

The slotted member 20 is preferably hollow to permit the continuous circulation of a suitable cooling medium therethrough, and this medium is introduced into the member through a supply pipe 28 adjacent the lower end thereof. The cooling medium, after it becomes heated, will normally rise within the member 20 and pass outwardly through the pipe 29.

One of the important features of the present invention, is the provision of means whereby the thickness of the edge being formed on the sheet may be varied as desired and effectively controlled. This is accom plished by providing means for contracting and expanding the

jaws

21 and 22 of the member 20 whereby to increase or decrease the width of the slot 35.

In order to expand the

jaws

21 and 22, there is carried by each of the

sides

15 and 16 of the yoke 14, apair of vertically spaced adjusting

screws

30 and 31. These adjusting screws pass loosely through the said

sides

15 and 16 of the stationary yoke and are threadedly received within bosses 32 formed on the

jaws

21 and 22. Thus, in order to increase the width of the slot 35 it is simply necessary to thread the adjusting screwsSO and 31 into the bosses 32, and wnen this is done the said jaws will be caused to move outwardly. This increasing of the distance between the said jaws will tend to necessa-' rily increase the thickness of the edge being formed on the sheet.

In order to contract the

yieldable aws

21 and 22 and thus reduce the width of the slot 35, there are'provided adjusting

screws

33 and 34; arranged at each side of the yoke 1-1 and between the adjusting

screws

30 and 31. The adjusting

screws

33 and 34 are threaded through the

sides

15 and 16 of the said stationary yoke and simply bear against the

yieldable jaws

21 and 22. T 0 move the yieldable jaws closer together, it is only necessary to first loosen the

screws

30 and 31 and subsequently thread the screws 33 and 3st inwardly. These screws bearing against the yieldable jaws will tend to force them closer together, thereby reducing the width of the slot 35 andthe thickness of the edge being formed on the sheet.

The operation of the machine with these width maintaining devices will be slightly different than with the knurled rollers described above. The edge of the glass sheet being drawn up will be pulled through the slot 35 and because of the inherent tendency of molten glass, a certain amount of frictional resistance will be had between the moving glass and the

jaws

21 and 22 of the mem-- ber 20. This frictional retardation encoura lowering of the temperature of the glass which is further accelerated by means of the cooling medium. The cooling is not so severe that the glass becomes set, but it is of such a nature that the edge of the glass will be comparatively viscous to the main body of the glass, thus being sufllciently strong to prevent the glass sheet from narrowing at its base. hile the present invention has been described hereinabove in connection with one particular type of process, yet it is to be understood that its use is not to be restricted to any one specific form of sheet glass apparatus, inasmuch it may be used just as satisfactorily in other types of processes.

For instance, in Fig. 5 has been dis-closed a portion'of the so-called Fourcanlt A rocess for drawing sheet glass and wherein the glass is melted in an ordinary hearth 36. This hearth communicates by an opening 3'! with a small reservoir 38. which receives and constantly being replenished with molten glass 39 from the furnace. A damper 10 of refractory material is provided for regulating and closing an opening 4:1 to allow more or less heat to pass from the hearth to the reservoir 38.

A block or deputer 12 of refractory material is arranged in the upper part of said. reservoir 38 and is provided with a vertical lot 43 through which the glass is forced upwardly under hydrostatic pressure. v

The sheet 4:45 is then drawn upwardly and passes between vertically spaced pairs of rolls 45, through an annealing apparatus 16 having the shape of a vertical casing. The sheet, after becoming set, is then cut transversely into sheet form will be appreciated.

In this form of the invention, the improved width maintaining devices are positioned be- 48 and L9.

Lean-e60 tween the annealing apparatus 46' and block 42. 6f course itwillbe understood that the block or deputer, 42 may be eliminated it desired.

The supporting structure 19 may be of any suitable construction, but is preferably of such a type thatithewidthmaintaining devices may be readily adjusted "relative to sheet 12. iisshown,the'supp'orting bar 18 is'securedat its outer end to a substantially rectangular plate 47 slidable within aguideway formed by the spaced guide blocks 48 and 49. The side edges of the plate at? are bevelled as at 50 to snugly fit corresponding 1y undercut bevelled edges of the guide blocks lVith such a construction, the width maintaining devices can be readily moved closer toor away from the sheet 12 as preferred and can be secured in the desired position by means of'set screws 51 which pass through the guideblocl: i8 and bind against the'plate li; I Y r llheguide blocks a8 and 49- are pivot-ally mounted asat 52 to a bearing member 53 pro- Vided with a depending screw-threaded rod 54"which is received within the central bear- :ingjportion55 formed on the plate 56. The

plate 56j'rests upon the upper surface of a ,channlironb? and the depending bearing portion 55 thereor' operates within a longitudinally extending slot i orined therein. The plate 56 is secured against accidental movement by nea'nsof bolts 58 "which pass through and also operate in slots formed in the channel iron 57, said bolts carrying at their lower ends'a secondplate 59which abuts the bott m of the channel iron. A nut 60- is threaded on 'thegrod 54 and rests upon the plate-56 sothat'the width maintaining device can be readily raised and lowered relative to the massot' molten glass 11, by sim'ply'ro tating the nut 60 in the desired direction.

Carried by the beari'ng member 53 are outwardly and oppositely directed lugs 61 through which are threaded vertical adj usting screws 62 which contact with the bottom of the guide block 49. Thus, when it is desired to adjust the angle of the width maintaining device relative to the sheet, 12, it is only necessary to first loosen one of the adjusting screws 62 and subsequently tighten up on the opposite screw whereupon the guide blocks 48 and 49mm be rocked about their pivots 52whereby to change the angle of the width maintaining device. In Fig. 6, the width maintaining device has been shown at an angle relative to the sheet, and by tilting the. devices in this manner, they will serve to grip and direct the edges of the sheet upwardly and outwardly, thereby stretching the sheet transversely whereby to permit a relatively wider sheet to be drawn from a given width oi draw pot. T i

In order to move the width maintaining devices horizontally and longitudinally of thedraw ipotythe bolts 58*can be loosened and the plate 56 slid along on the channel'iron '57. v With such supporting structure, as

described hereinabove, the width'maintaining devices can bemoved towards andaway from the sheet, raised or lowered relative to thedraw pot, moved horizontally and longitudinally ot'thedraw pot, and tilted upwardly or downwardly in the glass.

' in Figs. 8 and 9, wherein has been showna slightly modified form of the present inventio'ngit will be'noted that the slot 35 in the ,yoke'ormember 20, is widerat its lower end throughout its entire width; It isbelieved 4 thatwitlr'such a construction,the width of the sheet "can be materially increased.

'It is'to be understood that the formof-the invention herewith shown and described is to be taken as the preferred embodiment'of the' same, and that various changes {in the shape,-size and arrangement'ot parts may be resorted to \vithou-tdeparting trom'the spirit of the invention or the'scope of the subjoined claims. r I

Claims: i p i 1; In sheet glass apparatus, the combination with means for'dra'win'g 'asheet from a bath of molten glasaot means for maintain ing saidsheet to width, including a slotted member having resilient portions embracing the sheet edge.

In sheet glassapparatus, the combination with-means for drawing a sheet froma bath of molten glass, of means for maintain ing gsaid sheet to width, including a slotted member embracing the sheet'edge, and means for-deforming said'member to vary the width ofthe slot therein. v

V 1n sheet glass apparatus, the combination with means for drawing a sheet from a bath otmolten glass, 01 means for maintaining said sheet to width, including a slotted member having 'i'a' pair of spaced jaws embracing thesheet edge, and means for deforming said member to vary the distance be tween said jaws, V V

4. In sheet glass apparatuathe co nbi'nae tion with means for drawing a sheet from a bath "of molten glass, of means for maintaining sa'idshet to rwidth including a slotted 7 member having a pairof spaced jaws'embracing the sheetedg'e, means for deforming said member-to varythe. distance between said jaws, and means for internally cooling the jaws.

5. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a slotted member having resilient portions embracing the sheet edge, and means for effecting contraction and expansion of said resilient portions to vary the width of the slot in said member.

6. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a substantially U-shaped member having a pair of spaced resilient jaws embracing the sheet edge, and means for effecting contraction and expansion of said jaws to vary the distance therebetween.

'7. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a substantially U-shaped member having a pair of spaced resilient jaws embracing the sheet edge, means for effecting contraction and expansion of said jaws to vary the distance therebetween, and means for internally cooling said jaws.

8. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a yoke, and a deformable member arranged within and carried by said yoke and having portions thereof embracing the sheet edge.

9. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a yoke having spaced rigid side portions, a slotted member arranged within and carried by said yoke and having a pair of spaced aws embracing the sheet edge, and means carried by the side portions of the yoke and engaging the jaws for deforming said slotted member to vary the width of the slot therein.

10. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a yoke having spaced rigid side portions, a slotted mem- 38! arranged within and carried by said yoke and having a pair of spaced jaws embracing the sheet edge, means carried by the side portions of the yoke and engaging the jaws for deforming said slotted member to vary the width of the slot therein, and means for internally coolin said slotted member. 7

11. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a yoke having spaced rigid side portions, a slotted member arranged within and carried by the yoke and having resilient portions embracing the sheet edge, and means carried by the side portions of said yoke and engaging said resilient portions for effecting contraction and expansion thereof to vary the width of the slot in said slotted member.

12. In sheet glass apparatus, the combina tion with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a fixed substantially U-shaped member having spaced rigid side portions, a substantially U-shaped member arranged within the first member and having a pair of resilient jaws embracing the sheet edge, and means carried by the side portions of said first member and engaging the jaws of the second member for effecting contraction and expansion thereof.

13. In sheet glass apparatus, the combination with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a substantially U-shaped member having rigid side portions, a second substantially U-shaped member arranged within the first member and including spaced jaws for receiving the sheet edge therebetween, and means carried by the side portions of the first member and engaging the jaws of the second member for moving said jaws toward and away from one another.

14. In sheet glass apparatus, the combina' tion with means for drawing a sheet from a bath of molten glass, of means for maintaining said sheet to width, including a slotted member having a pair of jaws embracing the sheet edge, and means for deforming said member to vary the width of the slot between said jaws, said slot tapering from one end to the other.

Signed at Lancaster, in the county of Fairfield and State of Ohio, this 27th day of October, 1926.

LUKE C. MAMBOURG.