US1736570A - Paper-making machine - Google Patents

Description

Nov. 19, 1929. J. D. BEATTY PAPER MAKING MACHINE 7 Filed Sept. 5, 1928 1 4 0 n-|- .l-l' v w u m u a 7 0 N m M u 1 r m H 2 4 2 m 2 6 n r u 7 m w (2 m 6 5 1 M, z

m m m N I Ill A TTOR NEKIJ Patented Nov. '19, 1929' UNITED STATES PATENT OFFICE JOHN D. BEATTY, OF LOS ANGELES, CALTFORNIA PAPER-MAKING MACHINE Application filed September 5, 1928. Serial No; 304,006.

stock to the cylinder is under control at all local points.

An object of the invention is to provide an improved adjustable weir strip with devices for its local adjustmentwhereby the flow of stock maybe regulated independently.

at local points along the length of the weir with the result that the paper sheets will be uniform in thickness.

The invention also aims to secure convenience and ease in the adjustment of the weir strips.

With the foregoing and other objects in view, the invention will be described more particularly hereinafter and will be more fully pointed out in theappended claims.

In the drawings, wherein like parts are denoted by like symbols throughout the several views,

Figure 1 is.a fragmentary longitudinal section taken through a stock vat showing the improved weir strip and adjusting devices, and

Figure 2 is a cross-section taken on the line 22 in Figure. 1.

Referring more particularly to the drawings, which disclose only one embodiment of the invention, 5 designates the stock vat in which rotates the forming cylinder 6.-

The usual couch roll is represented at 7, an the customary wet felt at 8.

In the usual course the stock is obliged to flow as indicated by the arrows in Figure 2 over the weirs 9 and 10, and beneath the weir or. partition 11 which is spaced between 4 said weirs 9 and 10. The invention is concerned with an improved weir strip 12, which is preferably formed of rubber or some other suitable flexible and deformable material. The rubber strip may be reinforced by a steel or other flexible bar 13 about which the rubber maybe conveniently molded. On each of its ends the weir strip is supported by suitable hangers 14. .These hangers are preferably in the form of threaded bolts having bifurcated heads which straddle the upper edges of the bar or strip and are secured thereto as by the pins 15 which permit of a pivotal movement. The upper threaded portions of the hangers or bolts 14 extend. freely through brackets 16 carriedby the sides of the vat 5, and above the brackets 16 are disposed internally threaded handwheels 17 which engage the threads of the bolts. The handwheels 17 rest upon the brackets.

By rotating the handwheels the bolts 14 and with them the end portions ofthe weir strip 12 may be raised and lowered. The bracket 16 are shown as being secured to the sides of the vat as by the blots 18 or other suitablefastening.

The bolt 19 is shown as threadedly engaging througha nut 23 which is mounted for rotary movement but restrained against axial motion. The nut 23. is provided at one edge witha bevel pinion 24 disposed in mesh with a similar bevel pinion 25 set at substantially right angles thereto. The pinion 25 is keyed to the end of a shaft 26, which is disposed through one side wall of the vat 5. The shaft26 is provided with a bearing 27 carried upon the plate 28 which forms a common base for the mounting of the two pinions and the nuts 23. Where the shaft 26 extends through the vat a stufling box 29 is preferably provided. The stuffing box 29 is furnished to so avoid leakage from the vat. The outer end of the shaft 26 carries a handwheel 34 for rotation of the shaft in the act of adjusting the bolts 19. In likemanner the bolt 20 is engaged with the nut 31 having the bevel gear 32 in mesh with the bevel gear 33 fixed to the control shaft 34. This control shaft 34 also extends through a wall of the vat and carries the handwheel 35 for its manipulation.

Preferably the handwheels 30 and 35 are disposed close to ether for convenience in the adjustment. is many of the bolts, control shafts andhandwheels may be provided as demanded, by the len h of the weir strip 12,

and the necessity or its local adjustment.

"The bolt 21 is also engaged by a nut 36,

having a bevel pinion 37 arranged to be driven by a companion pinion 38 fixed on the controlshaft 39. Itwill be noted that the shaft 39 extends in an opposite direction and lies other points.

through the opposite end Wall of the vat 5. A number of the control shafts may be disposed one aboveanother through .this opposite vat wall, and it is to: be understood that the same are furnished with handwheels for con veniently rotating them in the one or the other direction. WVhilethe weir strip 12 is shown as located at the upper edge of the weir or partition 10, the same might be placed at the lower edge of the partition 11. That is, it might be employed where the stock is flowed under the making board insteadof over the making board as. shown in the drawing. The rubber strip 12 is .also reinforced by placing the same against the side of the weir 10. The gear assemblies are carried by the weir 10.

In the use of the device, the stock flows over the weir 10 and over the strip 12 to the forming cylinder 6, the stock becoming de posited upon the screen surface of the cylinder while the water passes through the same. The web formed by the stock on the cylinder is later picked up by the wet felt 8 and carried to other apparatus well known in this art. It is very important that the flow of stock be uniform all along the weir to the cylinder 6. For. instance, if a thick heavy flow of stock is observed to be passing over the weir strip at the point 20 and to be accumulating in an unduly thick mass on the forming cylinder at this point, by proper manipulation of the handwheel 35, the bolt 20 may be lowered,

thus forming upwardly the flexible weir strip 12 at this particular point and thinning the supply of the web to the cylinder.

This is accomplished without changing the position of the upper edge of the strip 12 at If the fiow'is observed to be too thin at any particular point, by reversing the direction of movement of the appropriate handwheel, the bolt and the flexible strip may be raised at this particular pointv without changing the rate of flow at other points. It will be understood that the gear arrangement represents only one form of device that may be used for shifting the strip 12, and thatother mechanical or other means might be substituted for this purpose. Rubber is preferable for the material of the strip as it presents a smooth and slick edge for the stock to flow over. Rubber also has the advantage of not collecting lint and other particles and adjusts more uniformly, especially with a reinforcing wire or rod of spring steel moulded in its center to stiffen it. The rubber strip affords a smooth and unbroken surface for the paper stock to flow over, and the same has'been found to be superior and more satisfactory than other more complicated arrangements devised to cope withthis particular problem.

I desire it to be understood that changes and modifications may be made in the herein described apparatus without departing from the spirit of the invention, provided such changes fall within the scope of the appended claims.

I desire to secure by Letters-Patent the following claims 1. In apapermaking machine, a stock vat, a forming cylinder in said vat, a weir adjacent said cylinder, a flexible continuous and. reinforced weir strip mounted at the top of theweir, adj ustable means for supporting the ends of the weir strip, and means engaged with the lower edge portion of the weir strip at suitable intervals for locally raising and lowering the upper edge of the weir strip.

2. In a papermaking machine, a stock vat, a forming cylinder therein, a weir adjacent the forming cylinder, a rubber weir strip mounted at the upper portion of the weir,- for regulating the flow of stock to the cylinder, and means whereby said rubber strip may be raised and lowered at various local points.

In a papermaking machine, a stock vat, a forming cylinder therein, a weir adjacent the forming cylinder, a rubber weir stripmounted at the upper edge of said weir, a

flexible metallic reinforcing element moulded within said strip, and means for raising and lowering said strip locally withoutaffecting other parts of the strip.

4. In a papermaking machine, a stock vat, a forming cylinder in said vat, a weir adjacent said cylinder, a weir strip mounted on said weir, means for supporting said strip, threaded bolts attachedat intervals to said strip, rotary non-travelling nuts threaded on said bolts, bevel pinions carried by said nuts, control vshaft, and bevel pinions on said control shaft meshing with said first-mentioned bevel pinions.

JOHN D. BEATTY.

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