US826193A - Straining-cylinder for pulp. - Google Patents

Description

No. 826,193. I PATENTED JULY 17, 1906.

- P. REINIOKE.

STRAINING CYLINDER FOR PULP.

APPLICATION rum) JAN 4 1906 lax en for UNITED STATES PATENT OFFICE.

STRAINING-CYLINDER FOR PULP.

Application filed January 4, 1906. Serial No. 294,582.

Specification of Letters Patent.

Patented July 17, 1906.

To all whom it may concern:

Be it known that 1, PAUL RniNIoKE, manufacturer, a subject of the'Duke of Anhalt, residing at No. 19 Baasdorferstrasse, Kothen, in the Duchy of Anhalt, German Empire, have invented certain new and useful Improvements in a Quickly-Rotating Straining- Cylinder for Pul of which the following is a specification.

The quickly-rotating straining-cylinders as constructed up to now consist of a cylindrical skeleton to which the sieve-plates forming the mantle are secured by means of hoops in such a manner that the sieve-plates may be easily removed in order to be cleansed.

My provement relates to straining-cylinders constructed in the aforedescribed way, and in order to make my improvement more clear I refer to the accompanying drawings, in which similar letters denote similar parts throughout the several views, and in which Figure 1 is a longitudinal section throu h a straining-cylinder embodying my invention, the left-hand portion of the figure being shown in side view. Fig. 2 is a cross-section through the cylinder shown in Fig. 1. Fig. 3 shows, on a larger scale, a cross-section through one of the skeleton-bars with its neighboring parts. Fig. 4 is a plan of the parts shown in Fig. 3; and Fig. 5 is a view similar to Fig. 4, but showing another portion of the cylinder.

The skeleton of the cylinder consists generally of the two frontal rings 1) b, which are connected with each other by means of bars 0, having a cross-like section, as shown in F ig. 3, and between the frontal rings 5 the bars 0 are connected with each other by hoops d, as shown in Fig. 1. The sieve-mantle consists generally of four parts arranged one parallel to the other, .all the parts being retained upon the skeleton before described by hoops 6, Figs. 1 and 2. The frontal ends of each sieve-plate abut tightly against the frontal rings b.

Straining-cylinders constructed in the before-described manner are possessed by the drawback that even under uniform conditionssuch as uniform pulp, uniform rotary speed, and the liketheir manner of operation is not uniform, so that the effect of the straining-cylinder is comparatively low. This is, as has been ascertained, due to the fact that in order to obtain also a uniformeifect the sieve-plates must be placed and adjusted and fixed to the skeleton in such a manner that the slots of the plates are located exactly at right angles to the longitudinal axis of the cylinder. Where means are afforded to let the slots assume and keep this proper position, the effect of a straining-cylinder constructed in such a manner will be always absolutely uniform.

In the known straining-cylinders the sieveplates, each of which has a length of aboutthree meters, are adjusted principally by eyesight, and only a considerably very short portion of each plate abuts a ainst the respective frontal ring of the ske eton, so that the slots of the plates assume easily a somewhat, although perhaps very slight, oblique position with respect to the longitudinal axis of the cylinder. Owing to this position, the slots act practically similar to the threads of a screw, and instead of allowing the mixture consisting of the fibers and the liquor wherein the fibers are suspended to pass through the slots in the proper way the slots in consequence of their obliqueness cause a certain portion of the fibers to move to one side of the cylinder, so that a correspondin 1y greater quantity of liquor is required and a comparatively greater consumption of power is entailed. Now to prevent these drawbacks by letting the slots assume and keep a perfectly proper position'id est, exactly at right angles with respect to the axis of the cylinderthe longitudinal bars 0 of the skeleton are provided with lugs or other projections-for instance, ledges 1", Fig. 4, or separate projections r, Fig. 5, or other means adapted to act as an abutment or as abutments for the sieve-plates a, so that these latter do not abut solely at their frontal ends against the frontal rings, as hitherto, but at their longitudinal sides too. This is distinctly to be seen in Figs. 4 and 5. Where there are ledges, as in Fig. 4, the lon itudinal sides, rims, or edges may be perfectfiy straight; but where there are separate projections, such as r in Fig. 5, the sieve-plates are provided with recesses adapted to receive the said projections. The height of the projections, lugs, ledge-s, or the like need only be such as corresponds to the thickness of the sieve-plates a; but, in fact, I prefer to let the ledges or the like have a somewhat greater height, so as to obtain the further advantage that when during the rotation of the cylinder pieces of wood or other larger parts of the pulp to be purified come in contact with the sieve-plates they cannot get to the rims of the latter, whereby ICO the rims might be bent and become untight. Further, Where ledges or the like of a greater height are used it is preferable to provide the plates a with a reinforcement 42, secured to the outer side of each sieve-plate and being so arranged that they are located below the outer hoops e so as to fill up the space formed by the sieve-plate and the hoop in consequence of the greater height of the respective projections; but instead of attaching the reinforcements o firmly to the sieve-plates a there may be special small plates similar to the reinforcements adapted to be shoved between the sieve-plate and the hoop, so as also to fill up the space before mentioned.

Having now described my invention, what -I desire to secure by a patent of the United States is 1. A rotating straining-cylinder comprising two end pieces 1), bars 0 of cross-shape in cross-section connecting the two end pieces together, segmental sieve-sections resting on the arms of the cross-shaped bars and havin their edges abutting top piece 1' thereof and hoops surrounding the sieve-sections and cross-bars for holding the sections in place.

2. A rotating straining-cylinder comprising two endpieces 1), bars 0 of cross-shape in cross-section connecting the two end pieces together, segmental sieve-sections resting on the arms of the cross-shaped bars and having their ed es abutting top piece 1' thereof, reinforcing-bands 1; arranged transversely on the sieve-sections and of substantially the same height as the top piece of the cross and hoops surrounding the cylinder and resting on the said reinforcing-pieces.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

PAUL REINICKE.

Witnesses:

RUDOLPH FRIGKE, SoU'rHARD P. WARNER.

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