US1173531A - Beating-engine. - Google Patents

Description

R. I. MARX.

HEATING ENGINE.

APPLICATION FILED JAN. 12. 1914.

Patented Feb. 2-9, 1916.

ROBERT J. MARX, OF LONDON, ENG-LAND.

BEAIING-EN GIN E.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed-Tannery 12, 1914. Serial No. 811,606.

To all whom it may concern:

Be it known that I, ROBERT J. MARX, a subject of the King of Great Britain, residing at London, England, have invented certain new and useful Improvements in Beating-Engines, of which the following is a specification.

This invention relates to pulp beating apparatus for use in the manufacture of paper, wood pulp and the like and has for its object to increase the efiicienoy and durability f this class of machines and .to lessen the co t of manufacture and upkeep thereof.

Prior to the present invention it has been the practice, in the manufacture of beating engines, to employ a rotating cylinder or roll oo-acting with a suitable stationary bedplate, the latter presenting a wide concave working surface conforming to the curvature of the roll, the material to be treated passing between these two members and being subjected in its passage to the action of cutting blades or edges, formed on or ina p serted into the roll. It has also been proposed to provide the periphery of the roll with spaced segments of abrasive material, but in such known apparatus the working surfaces of the segments have been in some instances grooved with the result that the walls of the grooves are liable to break away in use, while the grooves themselves tend to fill up, and thereby do not fulfil the purpose for which they are intended. In other instances the working surface of the segments has been so narrow as to preclude the stuff treated being reduced to the proper consistency, and furthermore the segments have been supported on the periphery of the roll by steel or other plates which themselves present no inconsiderable proportion of th entire working surface.

It is the object of the present invention to overcome the disadvantages pointed out, also to provide means for permitting a free and uninterrupted feed of the stock between the roll and bed plate.

The above and other objects and advantages of the present invention will be apparent from the following description taken in connection with the accompanying drawing in which,

Figure 1 is a diagrammatic end. elevation of a beater roll and bed plate made in accordance with my invention, a portion of the end plate being broken away. Fig. 2 is a side elevation of the invention partly broken away and partly in section.

Referring more-particularly to the drawings 1 represents a beating roll comprising a drum 2, mounted upon a journal 3 in turn running in suitable bearings (not shown). The segments 4 are fashioned from porous stone, such as basaltic lava, or any nonpolishable hard material, and are held in place on the roll by any appropriate means in such manner that they are not liable to pecome displaced when the roll is in operaion. I

In the embodiment of the invention, illustrated the reduced portions 5 of the segments project into the lon 'tudinally extending recesses 6 formed in tl ih periphery of the drum and are secured therein by any suitable means, such as cement. Pins 7 passing through the ends of the drum into the flanged or reducedportions 5 serve as additilonal means for securing the segments in ace. A bed plate 8 of hard non-polishable material suitably positioned with respect to the roll in the well known manner has a concave portion 9 conforming to the curvature of the roll, and a flattened or horizontal portion 10 for a purpose hereinafter described.

The working surfaces 11 of the segments are plain or uniform, in the sense that they are not provided with grooves, ridges, retaining plates, or the like, and all points on such surfaces lie at approximately equal distances from the central longitudinal axis of the roll; The said segments are separated by longitudinally extending transporting grooves 12 of substantial width and depth, so that they will not fill up and become choked with the material being beaten. In actual practice it has been found that the relative ratio of width betweenthe grooves and the working surface of the bed plate should be approximately one to two. Similarly, it has been determined that the working surfaces of the segments should be at least one quarter the width of the working surface 13 of the bed plate. These relative proportions are important in that experiments have proven that the results obtained by the present invention cannot be obtained if wide departures from the proportions mentioned are made. The efiect of the relatively broad plain non-polishable working surfaces of-the segments is that the stuif treated very quickly reaches a state of high greasiness, a most desirable consistency. 'This is a result which heretofore could not be obtained by the use of the ordinary steel beater bar, nor by the use of composite segments consisting of a pair of beater bars containing therebetween abrasive material. The known qualities of basalt lava and other porous non-polishable material to enhance. the greasiness of the stuff treated is increased in the present invention, in consequence of the much wider working surfaces employed than heretofore, and the consequent prolonged contact between the beating organs and the stud treated thereby.

As previously stated, the bed plate 8 is formed with a flattened portion 10 beginning at the front rise side of the bed plate and extending a short distance toward the back fall 13 where it merges into the concave portion 9. According to this arrangement, the space between the flattened portion 10 and the roll is somewhat greater than the space between the concave portion 9 and the roll. By providing a comparatively wide opening at the point of entrance of the stuff between the roll and bed plate the danger of clogging is obviated. Heretofore, the face of the bed plate has closely hugged the roll with the result that frequently the thicker portions of the stud being treated could with difliculty pass therebetween, and in some instances would back up and prevent all but the finer particles be-' ing properly treated. It will also be noted that by employing a comparatively small bed plate much less power is required to drive the roll while at the same time an ample working surface is presented;

Having thus 1 described my invention, what I claim is:

1. In a device of the character described, a beater roll, a front rise and a backfall, a bedplate having a flattened out inlet lip adjoining the front rise, such flattened out portion of the bedplate merging first into a concave portion of the bedplate conforming to the circumference of the beater roll and the backfall approximately conforming to the curvature of the roll, and a flattened out entrance lip adjacent to the frontrise of the beater trough.

3. In a device of the character described, a beater roll, a front rise, a backfall, a bedplate having the major portion of its surface concave to conform to the curvature of the roll, While that portion of the surface of the bedplate which is adjacent to the front rise is flattened out whereby the inflow of the stuff between the revolving roll and the stationary bedplate is facilitated and lodgments of stuff between the front rise and the bedplate are avoided. I

l. In a device of the character described, a beater roll, a front rise, a backfall, and a bedplate having its curved surface conforming to the curvature of the roll adjoining to the backfall, and its flattened out surface in a substantially horizontal plane'adjoining the front rise in a flush line, whereby access of the stuff to the roll is facilitated and lodgments of the stuff on its passage to the roll are avoided.

5. In a device of the character described, a beater roll, with segments separated by transporting grooves, a backfall of a height not less than the center line of the beater roll, a bedplate in which a concave portion is combined with a flattened out inlet portion merging into each other.

In testimony whereof I aflix my signature in presence of two witnesses.

ROBERT J. MARX.

Witnesses: V 4

JOHN A. PERCIVAL, FRED G. POHL.

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