US2203802A

US2203802A - Device for bringing the stock stream upon the screen of a paper making machine

Info

Publication number: US2203802A
Application number: US195035A
Authority: US
Inventors: Thaler Wilhelm
Original assignee: American Voith Contact Co
Current assignee: American Voith Contact Co
Priority date: 1937-01-25
Filing date: 1938-03-10
Publication date: 1940-06-11
Anticipated expiration: 1957-06-11

Description

June 1l, 1940. V w.,1-HAL.ER 2,203,302 DEVICE FOR BRINGING THE STOCK STREAM UPON THE `SCREEN 0F A PAPER MAKING MACHINE I Filed March 1o, 193s` `Fig. 7

Patented June 11, 1940 DEVICE FOR BRINGING THE STOCK STREAM- UPON THE SCREEN OF A PAPER MAKING MACHINE wilhelm Thaler, Heidenheim-on-the-Brenz, Germany, assignor to American Voith Contact Co. Inc., New York, N. Y., a corporation of New York Application Marchlll, 1938, Serial No. 195,035

. In Germany January 25, 1937 1 Claim.

` This invention relates to devices for bringing the stock stream upon the screen of a paper making machine. 1

` The object of the invention is to provide means specially adapted to solve the problems attendant highspeed stock impingement upon the screen.

The object is further to provide means enabling the stock stream to be varied in direction and in `respect to the screen, and also to vary the point of impact of the stream upon the screen, in a manner to assure smoothness and quietness of the stream.

The object is further to provide simple means to vary the `positions of the lips ofthe stock stream nozzles, the essential being that however the lips vary in respect to each other, the lower lip is within the upper lip.

With these objects in View, the invention in its simplest concept consists in having the upper portion of a stock inlet nozzle substantially horizontal or parallel with the upper surface of the screen of a Fourdrinier paper making machine, and the lower portion inclined in respect thereto, with the upper free discharge end at all times extending beyond the lower.free discharge end, and the discharge opening of the nozzle placed approximately at the part of the front breast roll.

The invention consists further of combinations therewith, of means for adjustment, and, lastly,

of a double nozzle, the outer walls of which are adjustable. I l l The invention further consists of certain features hereinafter to be described. The invention will be shown in the drawing in the forms of embodiments, and will be finally pointed out in the claim.

In the accompanying ,drawing- Figure 1 is a vertical section of the fore part of a screen, the front breast roll, and the improved nozzle applied thereto.

Figure 2 is a similar section with the same known parts, but with another embodiment of the novel nozzle applied thereto.

Similar characters of reference indicate corresponding parts throughout the various views.

Referring to the drawing, and more particularly to Figures 1 and 2, the screen breast roll 8, and part of the Fourdrinier screen 9 is there shown. l

In Figure l, the stock supply channel 'l guides and feeds the stock to a nozzle IU. In Figure 2, the stock also enters the nozzle I I, in this embodiment, from a stock inlet box I2. The nozzle II is formed of a substantially horizontal wall I3 and of a Wall I4 inclined thereto, the end of the `into, relatively permanent position.

wall I3 extending beyond the end of the wall In this embodiment, these walls I3 and I4 are xed or stationary and are arranged in the relationship shown in Figure 2. Adjustments of the nozzle `II may be made. For this purpose a movable extension plate I5, which is also substantially horizontal or parallel with the horizontal portion of the screen 9, is supported by an adjusting device secured to the housing of the stock inlet box I2 at I6. The plate I5 has 4a bent-up portion I1 provided with an opening to permit the passage of a .screwthreaded bolt I8 secured at I6 to the box I2. At either side of the bent-up portion I1, screwthreaded nuts I9 and 20 are arranged. The proper rotation of the nuts I9 and 20 on the bolt I8, with the corresponding movement of the plate I5, enables the plate I5 to be moved horizontally, and then xed The plate I5 slides upon the upper plate I3 of the nozzle II, and is, of course, in watertight connection therewith. By such adjustment means, not new per se, or by other suitable means, the `plate I5 regulating the outflow of the upper portion of the nozzle II, may be horizontally moved to and fro, and, asstated, placed into a relatively permanent position. v

The lower plate or portion of the nozzle II is formed by the upwardly inclined member I4. which, as before stated, terminates inwardly of the end of the plate or portion I3. To the exterior of the portion I4, there is provided an adjustment means, similar in operation to the `one just described. Tothe plate I4 is secured an upright plate 20, through which a bolt 2l 22a. The bolt 2I is screwthreaded and is engaged by two

rotatable nuts

23 and 23a, between which a bent portion 24 of the plate 25 is held, the bent portion 24 being provided with an opening for the passage of the bolt 2l. The free end of the plate 25 is below and within the free end of the plate I5. By the adjustment described, the plate 25 may be moved to and fro, but always within the limitation imposed, namely, to stay within the plate 25, as described. As the adjustment means per se are not novel, other suitable means well known may be used. By the adjustment shown in Figure 2, the stock iiow 30 is given a curved passage at 3|, as shown in Figl ure 2.

The stock box I2 may also be raised or lowered by suitable means, or the breast roll 8 may be raised or lowered. By these various adjustments,

a variation in the direction of flow of the stock upon the screen, as also a Variation in the position of impingement. of the stock flow upon the screen, can be had, and the desirable ones selected. y

In Figure l, the invention is shown in a; simpler embodiment. Here, a special form of stock ow channel I guides the stock along curved surface 33 substantially concentric with the curved surface 34, the curved surface 3,3 merging into a straight nozzle wall surface Ma, the free end of which terminates over the top but laterally of the same, of the breast roll 8. The curyed surface 34 is fixed 0r stationary, relatively, and in cooperation therewith there is provided a plate I5a arranged substantially horizontal and parallel with the upper surface of the screen 9. This plate 15a has a downwardly bent portion 35, having an opening or space to enable the bolt 36 to pass therethrough. This bolt is fixed to a supporting member 31. Two

rotatable nuts

38 and 38a' are movable uponthis bolt 36, and as moved determinesthe position of the plate |5a Again the 'adjustment means may befvaried, asthey are not new perse, and such variation is within the knowledge ofthe mechanic. Novel, however, is the relationship ofthe positions of the ends of the nozzle I0, in that whatever'adjustment may be carried out from one rnoz'zle portion to the other, or both in respect to each other, the upper plate or portion I5a is always Abeyond the lower plate or portion, as shown, for instance, in `Figure l, the free end of the upper plate or portion being approximately near the top of the breast roll, and in certain positions in substantial alignment with the vertical plane passing through th'eaxis of the front breast-roll.

,'Again, other fiexibilities may be provided, as, for

example, if the channel 1 be made of a flexible tubing, vertical lateral or inclined adjustments can be carried out in addition to the adjustment :essential .to the invention, that'the lower portion `of the nozzle be always within the upper portion,

ssgor. that the upper. portion always extend beyond the lower portion, in whatever position the respective portions may be. By this disposition of parts, the stock passes over the curvature Vof the breast roll due to the pressure of the stock, under v a definite desired angle of impingement upon the upper screen of the paper making machine. A lfurther advantage is that the invention lends itself especially to the utilization of higher working velocities machines, and that the stock flows with greater velocities upon the screen, the

stream jbeingr at the same time smoothed and quietedi It has been seen that by means of the invention, theembodiments of which have been shown, the direction of the stock stream in respect to the screen, as also the position at which the stock stream strikes the screen, may be varied, by extremely simple means.

By the devices described it is possible to give the stock stream freely emerging from the nozzle various directions and to guide it so that it impnges or strikes the screen at different positions, beginning with approximately the top of the breast roll; also, the angle can be influenced, under which the impingement of the stock 4s'tream upon the breast roll may take place. `All these positions of the stock stream are dependent upon the positioning of the upper portion or upperlip of the nozzle, in respect to the lower portion or lowerlip, the upper lip being parallel or approximately parallel with the screen, and movable substantially horizontally to and fro in respect thereto, and the under portion or underlip of the nozzle being positioned inclined in respect to the upper, and always within the upper. This projection of the upper lip portion has the further advantage that the stock stream moving at higher velocities Y upon the screen is smoothed and quieted. Y

It is obvious that various changes and modifications may be made in details of construction and the method of use of the above described embodiment of my invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claim.

I claim:

In a nozzle device for a stock receiving container for bringing the stock stream upon the top of a horizontal screen passing over the breast roll of a paper making machine, in which the lip members of theV nozzle are inclined to each other and in which the tip of the upper lip member extends beyond the tip of the lower lip member, the tips of both lip members being at the topof the breast roll, the combination of a horizontal upper lip member disposed parallel with the screen, an adjustable horizontal plate movabe upon the upper lip member to and fro in a horizontal direction, and an adjustable plate movable upon the lower lip member parallel to the plane of the lower lip member, the tip of the plate on the lower lip member being at all times at a distance inwardly of the tip of the upper horizontal member plate.

WILHELM THALER.