US1827228A - Beater bar - Google Patents

Description

F. M. GLOYD Oct. 13, 1931.

HEATER BAR Filed Feb. 10, 1931 2 Sheets-Sheet l atented Oct-l3, 1931 j uNiiEosTAT S P T OF FRANK MTGLOYD, or nAYroN oHIo, ASSIGNOR 'roslrxonns WORDEN wnm r. ooMrAmr, or DAYTON, OHIO, A conronn'rlonor onxo Brier-En. BAR

Application filed Februarj10d1931. Serial No. 514,511.

This invention relates to engines for-beating paper stock in themanufacture of paper,

and more particularly to improvements' -in the fly bars that are arranged on the periphery of the roll ofa beating engine.

lVhile my improvement is applicable to fly 7 bars of other designs I shall describe it first in connection with corrugated fiy bars of the type 7 shown in United States Patent No. 1,093,490. p I

The principal object of my invention is to increase the output'of a beating engine without any sacrifice of the quality of the output. This is accomplished by providing vent holes in the fly bars .0 prevent pocketing air in the spaces between the bars. As the corrugated bar shown in said Patent No. l,093,4.90, is a very fast bar, and as my improvement is capable of greatly increasing the speed oi? this bar as well as others,

desirable combination.

Another object of invention is to hydrate the stock adequately. A seriou's'obf stacle to speedy beating of paper stock has always been insuflicient hydration of the stock, with consequent danger of injury to the stockirom overbeating it. Y

'I shall now proceed to describerny'invention in detail with the assistance of the accompanying drawings, in which Fig. 1 depicts as much of a'beating engine, or beater, as it is commonly called, as is necessary in order that myinvention may be fully understood, said, figure'showing a portion of the tub, with one side removed to exhibit the beating roll and parts associ ated with the roll, 1

' Fig. 2 shows a transverse section'on line 22ofFig.1; N V

Fig. 3' isaperspectiveview of a fragment of a corrugated fly bar illustrating the application of my: improvement to such a bar; Fig. 4 is a transverse'sectional view of a cor- 4 rugated bar containing my improvement, portions of the wooden spacing blocks, and the location of the retaining ring being'indicated with dotted lines;

Fig. 5 shows a 5 bar looking directly at its working edge,

the addition ofr'ny iniprovement to the corrugated bar effects a very fragment: of a corrugated I p fill with stock. As the spaces pass over the showing. the positions of my vent holes relative to thecorrugations;

:Fig. 6 shows a non corrugated beater bar embodying my invention, and 1 a Fig. 7 isa transverse sectional view of the bar shown in Fig. 6.

' As Figs. 1 and 2 are to Figs. 1 and 2 of saidPatent So. 1,093,490, a very brief description of the older portions of the structure of said patent will suflice. The beater roll 10 is mounted to. rotate in the tub 11 on a shaft 12, journaled in bearings 13-43, inthe usual way- Under the roll 10 is the bed plate 14, and at one side of the roll is'the baclrfall- 15 as usual. The .roll

comprises disks 161616, keyed or otherwise secured fly bars 17 are secured with shrunken metal bands 18.. The. bars are additionally secured 'in the roll with strips of wood 19, which, 5

being dry when placed in the roll, swell-when they become wet and secure the bars very tightly initheroll. Thespaces between the free" standing bars, indicated at 20-20, etc.,

referred to hereinafter as interbar? spaces,

are boundedon two'sides by bars and on their bot-toms by the wooden strips or wedges 19.

in the main similar I to the shaft, on which disks the o The roll 10 rotates in the direction indicated bythe arrows, and the approximate level of the stock in the tub 11 is indicated by dotted line extending horizontally from the right of the roll in Fig. 1. As'the interbar spaces plunge into the stock, air is trapped in the spaces. That'is, at the speed at which the roll rotates there isnot sufficient time toallow the air to'escape from the interbar spaces, when the air must escapepast the incoming stock. Heretofore it has resulted that instead of filled with stock as they passed over the bed gplate, the spaces contained more or less air.

the interbarspaces being.

To correct this I provide a series of holes in each fiy bar at the bottom of the interbar spaces.

air in' thespace escapes through the holes or vents into the next higher space, which next space is still above the level of the stock in the tub: in Fig. 2 the ventsareshown at 21-21.

As the stockrushes into a space the v etc. Thusthe interbar spaces are allowed to H v bed plate a local circulation is set up in each space which brings about rapid change in the portions of the stock receiving treatment, which not only greatly increases the results from a quantitative point of view but because of abundant hydration injury to the stock is avoided, notwithstanding the speed with which it is beaten.

I have previously referred to the corrugated bar as very fast. This is partly due to the increased. effective length of the bar resulting from its sinuous or serpentine working edge. In other words, instead of the working edge of the bar being only aslong as the body of the bar,its sinuous form makes the working edge considerably longer than the length of the bar, or evenof the roll. This sinuous form of working edge also causes most of the interaction between the fly bar and the bed plate bars to be more or less oblique, which greatly accelerates the beating action. While this is inherent in the action of the corrugated bar, and is the invention of said Patent No. 1,093,490, it is pertinent to the present invention in that my vented fly bars, with the consequent well filled interbar spaces, employ to the fullest extent the possibilities of the corrugated bar.

Another advantage of combining my vents with the corrugated bar is the great strength of the latter. Notwithstanding I make the vents of considerable size, even to the extent of making the sum of the lengths of the vents approximate one-half of the length of the body of the bar, it is possible to retain the thin working edge, which is one of the most desirable characteristics of the corrugated bar, without weakening the bar appreciably. This will be better understood by referring to Figs. 3, 4: and'5 where the construction of the corrugated bar is clearly shown, as I shall now explain.

The bar comprises two parts, a stock portion 22, which is the portion that is clamped between the wooden strips 19, and the corrugated portion 23. The stock portion is rat-her thick, especially at the part where the corrugated portion joins it. The corrugated portion is much thinner, but the change in the thickness is not so abrupt as to produce a weakness. On the contrary, the root of the corrugated portion is supported by fillets into which the corrugations merge, forming a very rigid support for the corrugated portion of the bar.

The location and relative size of the vents 21 are best shown in Figs. 3, 4.- and 5. In Figs. 3 and 4 fragments of one of the bands 18 for securing the bars in the roll are shown with dotted lines, the band lying in a notch 25 in each end of each bar. The wooden strips or wedges are shown with dotted lines at 1919 (see Fig. 3). In these figures it will be seen that the vents 21 are placed close to the strips 19. It will also be noticed that the vents are in the concavities between corrugations as seen from the forward face of the bar. By the forward face is meant the face which leads as the bar moves with the roll, the direction of movement of the bar being indicated with arrows in Figs. 3, 1 and 5. It is not essential that the vents be placed in the concavities as shown, but it has the advantage of leaving intact the portions of the bar that are subjected to greater tensile strain when the bar is in operation. In Fig. 5 the longitudinal dimension of the vents 21 is best indicated, and it will be seen that the length of each vent is close to the distance between vents.

The bar shown in Figs. 6 and 7 is of an old and well known form, but provided with my vents 21 its effectiveness is very much increased.

Having described my invention and the preferred embodiment thereof, 1 claim:

1. A beater bar traversed from front to rear by a series of holes adapted to serve as vents to prevent air being pocketed in spaces between adjacent bars in a beater roll equipped with such bars, said holes being isolated from the working edge of the bar.

2. A beater bar traversed from front to rear by a series of holes adapted to serve as vents to spaces between adjacent bars in a beater roll equipped with such bars, said holes being so situated that when the bars are mounted in a roll the holes will be at the bottom of the interbar spaces.

8. A beater bar comprising a stock portion and a blade portion, the latter portion being corrugated transversely, a series of 1 holes traversing the corrugated part of the bar from front to rear close to its juncture with the stock portion.

l. A beater bar comprising a stock portion and a blade portion, the latter portion being corrugated transversely, a series of holes traversing the corrugated part of the bar from front to rear close to its juncture with the stock portion, said holes being in the concavities between corrugations as viewed from the forward face of the bar.

5. A beater bar comprising a portion adapted to be secured in a beater roll, having the remainder projecting from the roll, said remaining part being corrugated transversely, the former part being uncorrugated, the corrugated part being pierced by a series of holes close to its juncture with the uncorrugated part. j

6. A beater bar one face of which is substantially flat, the opposite face consisting of two planes, one inclining from each edge and meeting at a point intermediate its edges, said bar being pierced by a series of holes in alignment with one edge of the bar but removed therefrom.

7. A beater bar traversed from front to prevent air becoming pocketed in lie rear by a series of holes adapted to serve as vents to prevent air being pocketed in spaces between adjacent bars in. a beater roll connecting said inter-bar spaces to prevent pocketing air therein, the length ofthe Working edges of said bars being no less than the length of the bars.

10. A beater roll comprising a series of beater bars radiatingfrom a cylindrical body,

forming interbar spaces, and holes traversing said bars and connecting the spaces on each side thereof, whereby to prevent pocketing air in said spaces.

11. A beater roll comprising a series of beater bars radiating from a body, thereby forming interbar spaces, and holes traversing said bars and connecting interbar spaces on each side thereof, said holes being near the bottoms of interbar spaces, whereby to prevent pocketing air in said spaces.

FRANK M. GLOYD.

CERTIFICATE or coRRecTIoN.

Patent No. 1,827,228. October 13, 1931.

FRANK M. GLOYD.

gr It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as foilows: Page 1, line 28, for "overheating" read "overheating"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 24th day of October, A. D. 1933.

F. M. Hopkins (Seal) Acting Commissioner of Patents.

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