US1497403A - Paper-machine slice - Google Patents

Description

June 10. 1

C. E. BRUNER PAPER MACHINE SLICE Filed Aug. 13 1923 Application filed August 13, 1923. Serial No. 657,075.

under pressure and passes out through a relatively narrow orifice between the lower edge of the slice and the apron board. The width of this orifice determines the thickness of the sheet of. paper which is to be formed. Slight irregularities and diflierences in relative speeds of the flow of the paper stock, necessitates auxiliary adjustment so that the paper stock will be deposited uniformly on the wire. The paper stock as it passes out throu h this orifice .formed by the lower edgeo the slice has a tendency to boilor eddy, due to the sudden release from pressure, which is a natural phenomena of a liquid when it passes tlrough an orifice having relatively sharp e ges.

The object of my invention'i s, therefore, to provide a slice which will control the flow of the paper stock, so as to materially eliminate the eddies and, boiling as the paper stock passes from under the slice.

A further object is to provide a lip for a slice of this character which has a uniform, constant, curvature at any of its adjustments and which is ada ted to be ad justed only in a vertical p ane. That is, the minor adjustments of the slice will be taken care of by this lip without the necessity of twisting the li about its horizontal axis, or causing the 11 to be hinged so as to permit this minor :1 justment by the flexing of the bar.

I attain these objects in a slice com rising a paper making machine of the 0 aracter described, deckle frames, an apron board, a pendent plate constituting a slice supported on said deckle frames over the apron board of the machine, a bar of substantial cross section, provided with a longitudinal groove of substantial de th in which the lower edge of the slice 1s relatively slidable," verticall said bar being made of substantial wi th, and its'lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron'board greater at the inlet side than at the outlet side of said opening, and means for raising and lowering said bar, whereby the area of said inlet side of said opening is maintained constant relatively to its outlet side, and

relatively to the raising and lowering of said bar.

I illustrate these and other objects in the, accompanying drawings, in which:

Fig. 1 is a fragmentary side elevation bf my improved slice in position between the deckle frames of a paper machine;

Fig. 2 is a fragmentary perspective of one end of my slice with my improved lip shown detached therefrom;

Fig. 3 is a diagrammatic section through the slice in place ona paper machine and shows the action of my slice in preventing the eddies and the boiling eiiect of the paper stock due to the passage of the paper stock through a restricted orifice and Fig. 4 is a fragmentary perspective view showing details of construction.

My improved slice is made with a main piece a which has an adjustable lip b on its lower edge. I provide an outstanding flange c on its upper edge and adjusting rods d, the lower ends of which seat in bosses 0 on the adjustable lip. I provide recesses f in the outstanding flange c in which I journal the extended hubs g of the handle wheels it. These hubs 9 have cut away portions g which fit in the recesses and the thicker portions form shoulders which bear on each side of the flange. The hubs g and the upper ends 5 of the adjustable rods d are threaded and thus by rotating the hand wheels the adjustable rods will be adjusted. As previously described, the lower ends of the rods (Z are seated in the bosses e on the lip b and are held in place by set screws j so that theycan have no relative movement in their seats. I provide a locking nut 71 above each hand wheel h so that when'the hand wheel has adjusted the rod d to the position desired, the locking nut is may be set so as to hold it in a set position. There are a number of these adjusting rods spaced across the entire length of the'slice and thus the minor adjustments of the slice may be made by flexing the lip b by one or several of these adjusting rods. The major adjustments of'the slice are taken care of in the ordinary manner at its ends. The slice is supported at each end by brackets Z which are mounted onthe deckle frames m. The brackets have two outstanding ears n which are spaced so as to permit an adjusting nut o to be fitted closely between them. Each end of the slice has an adjusting screw in which is rigid on a supporting flange p which is arranged on each end of the slice. This screw p fits in the nut 0- and thus by rotating the nuts on either side of the slice will cause the slice to be lifted or lowered at that side.

The orifice beneath the slice through which the paper-stock passes is closed on its sides by deckle straps q and on the bottom by an apron board r. The stock passes from ofi the end of the apron board and onto the wire 8 which is mounted over the breast roll t. It is to be noticed that the lower face 6 of the slice b is inclined towards the apron board 1' and the inner edge of the slice as b is curved so that the slice and the apron board to ether form substantially a stream like ori ce andthus as the paper stock passes from under the lip it is contracted slightly and, directed in straight lines. The slice is grooved along its entire width, as at a, which is of substantial depth. The lower edge of the slice a is substantially the same width as the groove and is of uniform thickness along its entire length and thus fits snugly in this groove. It follows therefore that the lip may be adjusted in relation to the slice and this adjustment will be taken care of by the lip sliding on the lower edge of the slice and therefore will cause no opening through which the stock might pass and thus spoil the sheet of paperv being formed by spurting through and causing the formation to be uneven.

The adjustment for my improved lip is, therefore, made, entirely in a verticalplane and the bar'is flexed also in a vertical plane,

that is the bar is relatively flexible and the adjusting bars (I are ada ted to force the lip downwardly or upwardly at oneportion o the slice but at all points of adjustment, the angle of inclination of the lower edge of the slice through the apron board is t same. The contraction of the water as it passes throu h the slice is always therefore the same an thus the paper stock is deposited on the wire without any substantial difference in speed or thickness so as to cause certain portions of the stock to move faster or slower than the remaining portions, thus t 0 paper stock to cause an uneven deposi onthe wire.

I claim:

1. In a paper making machine of the character described, deckle frames, an apron board, a pendent plate constituting a slice supported on said deckle frames over the apron board of the machine, a bar with which the lower edge of the slice is relatively slidable, vertically, said bar being made of substantial width, and its lower face making an angle withthe horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outlet side of said opening.

2. In a paper making machine of the character described, deckle frames, an apron board, a pendent plate constituting a slice supported on said deckle frames over the apron-board of the machine, a bar with which the lower edge of the slice is rela tively slidable, vertically, said bar being made of substantial width, and its lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outlet side of said opening, and means for'raising and lowering said bar.

I 3.- In a paper making machine of the character described, deckle frames, an apron board, a 'pendent plate constituting a slice supported on said deckle frames over the apron board of the machine, a bar of substantial depth in which the lower edge of the slice is relatively slidable, vertically, said bar being made of substantial width, and its lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outlet side of said opening, and means for raising. and lowering said bar, whereby the area of said inlet side of said opening is maintained constant relatively to its outlet side, and relatively to the raising and lowering of said bar.

4. In a paper making machine of the character described, deckle frames, an apron board, apendent plate constituting a slice supported on said. deckle frames over the apron board of the machine, a bar provided with a longitudinal groove of substantial depth in which the lower edge of the slice is relatively slidable, vertically, said bar being made of substantial width, and its lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outlet side of said opening, and means for raising and lowering said bar, whereby the area of said inlet side of said opening is maintained constant relatively to its outlet side, and relaiively to the raising and lowering of said ar. 5. In a paper making machine of the character described, deckle frames, an apron supported on said deckle frames over the apron board of the machine, a bar of substantial cross sect-ion provided with a longitudinal groove of substantial depth in which the lower edge of the slice is 'rela tively slidable, vertically, said bar being made of substantial width, and its lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outet side of said opening, and means for raising and lowering said bar, whereby the area of said inlet side of said opening is maintained constant relatively to its outlet side, and relatively to the raising and lowering of saidbar.

6. In a paper making machine of the character described, deckle frames, an apron board, a pendent plate constituting a slice supported on said deckle frames over the apron board of the machine, a bar of substantial cross section with which the lower edge of the slice is relatively slidable, vertically, said bar being made of substantial width, and its lower face making an angle with the horizontal thereby making the area of the opening under said bar over said apron board greater at the inlet side than at the outlet side of said opening, and means for raising and lowering said bar, whereby the area of said inlet side of said opening is maintained constant relatively to its outlet side, and relatively to the raising and lowering of said bar.

- CLARENCE BRUNER.

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