US1093490A - Knife-bar for beating-engines. - Google Patents

Description

H. R. SIMONDS.

KNIFE BAR FOR BEATING ENGINES;

APPLICATION FILED n13.21, 1913.

Patented Apr. 14, 1914 2 SHEETS-SHBET 1.

ygbss INVENTOR $imm A llorm zo H.'R. SIMONDS.

KNIFE BAR FOR BEATING ENGINES.

APPLICATION PILED"1-EB.'2-1, 1913.

Patented Apr. 14, 1914 2 SHEETS-SHEET 2.

[N VEN TOR 3mm Allomeya HERBERT n. SIMONDS, or narrow, onro, Assrenon ro rnn a A. sriuonns & son CQIVIPANY, or nn'rron'onro, Accnronarron or cure.

marlin-nan ron nE'arIne-nnemns.

ncense.

Specification of Letters Patent.

Application filed. February 21, rate. Serial No. 749,916.

Patented Apr. Ml, 11914.

To all whom it may concern f Be it known that I, HERBERT R. Srraonns citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new tures hereinafter described, reference being had to the accompanying drawings which show one embodiment of my invention selected by me for purposes of illustration, to gether with a slight modification thereof,

and the said invention is fully disclosed in the following description and claims.

Referring to the accompanying drawingsz-Figure 1 represents so much of a beating engine or macerating device for paper pulp as is necessary to be shown in order that a complete understanding of my invention may be. had, the said figure showing a portion of the tank with oneside removed a-nd the cylinder being provided with the improved knife bar hereinafter more fully described. Fig. 2 represents asection on line 2-2 of Fig.1. Fig; 2 is a detailed sectional view of a portion of the mechanism. Fig. 3 is. a pers ective .view of a portion of my improved nife'ba-r illustrate ing one end of the same and showing in dotted lines the relation of the spacing blocks and retaining ring thereto. Fig. 4

is a transverse sectional view of my im proved knife bar, portions of the spacing blocks, and the location of the retaining ring being indicated in dotted lines. Fig. 5 represents a top plan view of a portion of the corrugated edge of one of my improved knife bars. Fig. 6 is an edge view of a portion of the knife bar looking at the corrugated portion thereof. Fig. 7 r is an end view of a' knife bar embodying a slight modification of my invention.

The object of my invention is to provide an improved knife bar for use in the rotated cylinder of a beating engine or pulp macer- ,ating device for the preparation of paper pulp which can be inserted in and used in the cylinder of the ordinarycoin percial machines now in use; which is provided with a transversely corrugated edge portion of I novel construction and which'is particularly designed to produce in conjunction with the Stationary knives of the machine a wiping or sweeping'action produced by holding the knife bars in the cylinder so that they extend rearward of a radial position therein, and also providin means for insuring that the material, whic has a tendency to collect. between adjacent blades of the cylinder, shall be continually thrown outward by the blades so that all ortions of the pulp. may be acted 5 upon in tlie most uniform manner. In Figs. 1 and 2 I have showna portion of a beating engine or macerator in order that my invention may be more clearly un derstood, In said figure, 1 represents a tank for holding the pulp, the forward side of which has been removed to disclose the in terior, and 2 represents the usual central partition of the tank around which the material circulates. 3- represents the stationary knives, or bed and 4 represents the beat ing cylinder which is of usual construction and comprises a plurality of disks, 5, mounted ona shaft, 6, sup orted in vertically ad-- justcd bearings, 7, 0 any desired construction above the bed, 3. The cylinder disks, 5, are provided with a plurality of knife bar receiving recesses, one of which is illustrated in Fig. 2*, each having one wall, 5 substantially radial or parallel to a radius and the opposite wall, 5 inclined with respect thereto and diverging therefrom outwardl from the bottom of the recess. In accor ance with my invention the drum is so located'that when rotated in the direction of the arrow, Fig; 1, the'radial side of the recess will be on the forward side of the blade, havin reference to the direction of rotation. for .convenience of reference herein, 1 will designate the substantially being placed in engagement with the recesses of the disks, 5, are held in place therein by I a ring, 8, (see Fig. 1) which en ages recesses in the ends of the knife rs and clamps them firmly to the outermostdisks,

be readily understood with ref- Oil structure two portions which for conven-- ience I designate as the stock portion, 11, and the edge or blade portion, 12, the stock portion being that port-ion which engages the recesses in the cylinder and lies between the spacing blocks or wedges thereof, and

the edge portion being the portion which projects beyond the wedge blocks. The

stock portion of the bar has two plane. faces, 11 and 11", the face 11 being disposed perpendicularly to the inner edge, 11 and the outer edge 12 and the face 11 bein disposed angularly to the face 11 and diverging therefrom outwardly from the inner edge 11 and being so shaped as to fit the recesses in the cylinders now in ordinary use in this class of machines. The stock portion of the bar is provided at each end with a recess or notch, 11, leaving a tongue, 11, between said recess and the inner edge 11 which is of slightly greater depth than-the recess, so that the retaining rings when shrunk in position will have a firmengagement with said tongue and firmly hold the bars in place. The edge portion, 12, of the bar is provided with corrugations extending transversely of the length of the bar, the alternating corrugations having their axes disposed angularly to each other, as indicated by the dotted lines. ww and yy in Fig. 4, and diverging from each other outwardly from the stock portion. In the preferred form of my improved knife bar those corrugations which present their convex faces to the-forward side of;the bar, the direction of rotation being-indicated by the arrow, 2, in Figs. 3 and 4, have the apices of said convex faces in substantial alinement with the face, 11*, of the stock 'portion. The alternate corrugations which present their concave faces, 12* to the forward side of the bar have said faces dis osed angularly to the plane of the rear ace, 11 of the stock portion, the said concave faces being given a rake outwardly and rearwardly for two important purposes, one of which is to produce a wiping action on the pul as the knife bars pass over the stationary ed, 3, as is clearly shown in Fig. 1, and the other is to cause the said concave faces to so act upon the material during the revolutions of the cylinder as to throw outwardly the material between adjacent blades of the cylinder and prevent it from traveling around and around with the cylinder. The

in order that the outer edge of the face,

12, may be ground when necessary without increasing the width of said face. The said corrugated portions are, however, gradually made thicker adjacent to their line of union with the stock portion, thereby forming curved or inclined shoulders, 12 and 12* which terminate at the line of union with the stock portion indicated by the dotted line, 10, in Fig. .3 at which point the bar has its greatest thickness. It will thus be seen that the shoulders, 12 and 12*, in conjunction with the thick end of the stock into which they merge form braces which greatly strengthen and reinforce the corrugated edge ortion of the bar to resist the strain to w ich it is subjected and which is exerted upon the edge portion substantially perpendicularly thereto, and this construction in conjunction with the corrugations of the edge portion give'the blade great stiffness and strength with a minimum of weight and material. The shoulders, 12?

on the forward side of the blade which form continuations of the concave faces 12 also serve another important function in that they act as cams or inclined faces which assist in throwing the material between the adjacent blades of the cylinder outward. It will also be noted that the convex portions of the corrugations, on the forward side of the bar or blade, have a tendency to crowd the material in opposite directions longitudinally of the blade and intocontact with the shoulders, 12?, and concave faces, 12*, and

contribute to this important result;

I have stated heretofore that the forward concavefaces, 12, of the edge portion are given a rake outwardly and rearwardly, and, as a matter of fact, I prefer to impartthis rake to the entire alternating corrugations which present their concave faces to the forward side of the bar by bending said corrugations inward at their inner ends and forming a slight shoulder, 12, on the rear face of said corrugations as is clearly shown in Fig.4, and this is my preferred construction. The rear edge of the outer face, 12, at

the rear of said alternating corrugations, will preferably, however, be in alinement with the rear face, 11*, of the stock portion of the bar.

In placing my improved bar in therecesses of the cylinder I prefer to place it with the front face, 11 of the stock portion,

which is the inclined face of the stock portion, in engagement with the straight face of the recess, the straight. face, 11, .of the bar being in contact with the inclined face 5, of the recess, as this imparts a rearward rake to the entire bar and tends to give it the sweeping or wiping action before de.

scribed as well as forcingthe material outwardly from the cylinder, and this efi'ect is increased by imparting therak e before described to the alternate corrugations'presenting their concave faces to-the frcn'tof the bar, and the shoulders, 12 further assist in forcing the material outwardly. By thus setting the bars in the cylinder so as torake I backward the advanced portions of. the outermost edge, 12, extend outwardly from the cylinder agreater distance. than the rearmost portions of said edge. Hence in looking down upon the corrugated edge as in Fig. 5, the outer extremity thereof appears I 'tobe slightly curvedand as the edge passes over the straight faces of the knives of the bed 3, opportunities'are provided for the 1r aterial to continually redistribute itself as it is acted upon, and .thusa .more uniform treatment of the pulp is efiected. t

In Fig. 7, I have shown .a slight modification of my improved knife bar which is subtions have their axes parallel to the plane stantially identical with the form shown in Figs. 3 to 16 inclusive except that the alternate corrugations presenting their concave faces .to the forward side of the edge or blade portions are not given the backward rake which I have previously described, but, on the contrary, the said alternate corrugation being indicated generally as 22. Of

this form of bar the rear face 21* is disposed substantially perpendicularly to .the inner edge 21 and the outer edge 22, and forms the straight side while the face 21 of the stock portion diverges from the face 21 and engages the straight face 5 of the recess in the cylinder. Thus the bar whenplaced in the cylinder will have a general backward rake as before described with reference to the preferredform of blade, thus impart-ing the sweeping or wiping action onthe material and tending to discharge the same outwardly from between the bars, which latter action will be facilitated by the forwardly disposed shoulders, 22 The shoulders 22 and 22 also reinforce the edge or blade portion and transmit the strain on the outer edge of the bar to the thickest (portion of the bar-andlthis-niodified form of knife bar is capable of advantageous use, although I prefer the constructionillustrated in Figs.

3 to (S. ln'the tank 1 in conjunction withthe bed, 3, are usually provided an inclined surface, 25, on one side ofthe cylinder and a ,concave surface, 26, on the other side partially surrounding the cylinder for the purpose of deflecting the material to the cylinder and bed and insuring the propulsion of the materialin the tank so as to bring fresh portions of the material continuously between the cylinder and bed. By reference to Fig. 1 it will be observed that in the rotaticn of the cylinder the corrugated knife bars approach the bed, 3, with a Wiping or sweeping'action which disintegrates the fibrous material without cutting or shearing the fibers thereof, and it will also be seen that the material which necessarily is' collected between the adjacent blades of the cylinder will be discharged therefrom, over the top edge of the concave portion 26, the material then passing aroundthe center partition, 2, and being continuously treated until the proper degree of maceration has been attained.

What I claim and desire tosecure by Letters Patent is 1. A knife bar for beating engines comprising a stock portion to engage the beating cylinder and an edge portion of reduced thickness extending along the outer portions of the bar, and corrugated trans- .versely of the length of the bar, the alternate corrugations aving their axes inclined to'each other, said axes diverging toward theouter edge of the bar.

- 2. A knife bar for beating engines comprising a stock portion to engage the heatingcylinder and a reduced edge portion corrugated transversely of the length of .said bar, the alternate corrugations having their axes disposed angular-1y to each other and diverging toward the outer edge of the knife .bar, said corrugations increasing in thickness at their junction with the stock portion, formin inclined shoulders for reinforcing the e ge portion of the bar and assisting in discharging material from between adjacent bars ofa cylinder.

3. A knife bar for beating engines comprising a stock portion to engage the beating cylinder having its front and rear faces disposed angularly to each other and diverging from the inner edge of the bar outwardly, and a reduced edge portion corrugated transversely of the length of the bar, the alternate corrugations having their axes disposed angularly to each other and diverging outwardly from the stock portion, said corrugated portions being gradually increased in thickness adjacent to their union with the stock portion to form inclined shoulders for assisting in discharging material from between adjacent bars .of a cylinder said bar having its greatest thickness at the union of said shouldered portions with the stock portion.

4. A knife bar for beating engines comclined shoulders, said bar having its great-.

est thickness at the union of said shouldered portions with the stock portion, said corrugated portions having the apices of their alternate corrugations at the outer edge of the bar, substantially in the planes of the front and rear faces respectively of the stock portion of thebar.

5. A knife bar for beating engines comprising a stock portion to engage the beating cylinder and an edge portion of reduced thickness, said edge portion being corru-' gated transversely of the length of the bar, the alternate corrugations having their axes disposed angularly to each other and diverging from their union with the stock portion outwardly, the corrugations presenting their concave faces 'toward the forward face of the bar having their forward faces inclined: outwardly and rearwardly with respect to the plane of the rear face of the stock portion to assist in throwing the material outwardly and imparting a wiping action to the material in connection with the stationary knivesof the machine.

6. A knife bar for beating engines comprising a stock portion to engage the beating cylinder and an edge portion of reduced thickness, said edge portion being corrugated transversely of the length of the bar, the alternate corrugations having their axes disposed angularly to each other and diverging from their union with the stock portion outwardly, the corrugations presenting their concave faces toward the forward face of the bar having the portions nearest the stock portion set in from the plane of the rear face of the stock portion, and their vaxes inclined outwardly and rearwardly therefrom with respect to the plane of the rear face of the stock portion to impart a wiping action to the material and to as-' sist in throwing the material outwardly.

7. In a beating engine,-the combination with the cylinder provided with knife re ceivmgrecesses, of a knife bar having a. stock portion to engage sald recesses, and an edge portion of reduced thickness extending along the outer portions of the bar, and corrugated transversely of the length of the bar, the alternate corrugations having their outer faces inclined to each other and diverging toward the outer edge of the bar. said stock and recesses being constructed to hold the knife bar in such position that the forward faces of the concave portions of the knife bar will extend rearwardly of a radial position, to facilitate the discharge of material from between adjacent knife bars.

8. In a beating engine, the combination with the cylinder rovided with knife receiving recesses, o a knife bar having a stock portion to engage said recesses and an edge portion of reduced thickness extending along the outer portions of the bar, and corrugated transversely of the length of the bar, the alternate corrugations having their outer faces inclined to each other and diverging toward the outer edge of the bar, said stock and recesses being constructed to hold the knife bar in such position that the axes of the convex portions on the forward face of the bar willnot .extend forward of a radial position, and the axes of the cohcave portions .will' extend rearwardly of a radial position, to facilitate the discharge of material from between adjacent bars of the cylinder.

9. In a beating engine the combination with the cylinder provided with knife receiving recesses, each having one face disposed substantially radially and the opposed face inclined thereto and diverging therefrom outwardly from the bottom of the recess, of a knife bar having a stock portion provided with a longitudinal face disposed substantially perpendicularly to the edge faces of the knife bar and the opposite face inclined thereto and diverging therefrom outwardly from the inner edge of the bar,

said bar'having an edge portion of reduced thickness corrugated transversely of the length of the bar, the alternate corrugations having their axes disposed angularly to each other and diverging outwardly from the v stock portion, said bar having the perpendicular face against the inclined face of the engaged recess, and means for securing said bar in said recess.

In testimony whereof I afiix my signature EUGENE G. KEN EDY, LOUISE A. BAUER.

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