US2610553A

US2610553A - Controlled flow beater

Info

Publication number: US2610553A
Application number: US212753A
Authority: US
Inventors: Hayes Frank
Original assignee: Noble and Wood Machine Co
Current assignee: Noble and Wood Machine Co
Priority date: 1951-02-26
Filing date: 1951-02-26
Publication date: 1952-09-16
Anticipated expiration: 1969-09-16

Description

v Sept. 16, 1952 F. HAYES 2,610,553

CONTROLLED FLOW BEATER Sept. I6, 1952 F. HAYES 2,610,553

V CONTROLLED FLOW BEATER Filed Feb. 2e, 1951 2 sHEETs-sm'r 2 Il l l a? l) Z3 /10 31 u. :I l/ 30 i Iazleizoif: 4g Ffaa Hqyes,

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atented Sept. 16,1952

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Frank Hayes, 'Hoosick Falls,r N. Y., assigner to lThe Noble & Wood Machine Co., Hoosick Falls, N. Y., a corporation of New York -llpplicaticn February 26, 135i, Serial No. 212,7 53

(ci. .ecm-a2) d Claims.

This invention relates to beaters or Hollander employed in the preparation of fibrous material for use. -in the manufacture of paper and paper products.. and more particularly to improved beater construction for accomplishing the necessary fiber change more rapidly and more efficiently. This application is a continuation `in part of my co-pendingY application Serial No. 757,823, led on June 28, 1947; l

Specifically, the .machine of my invention is used for cutting,.brushing, bruising, fraying, fibrilating or otherwise acting uponfibers or mixing in other ingredients until they are in proper condi'- tion to make a sheet of paper. However, it will be understood that the material treated by my improved machine maybe used in the manufacture of any product for which the liber is adapted.

It is accepted in the industry that beater treatment Aof paper stock is preferable. over any other type of refining for theproduction of high quality papers. However, conventional beaters are eX- pensive to operate and their daily output is so low that in `many industrial applications quality is sacrificed in favorl of production volume and efficiency. Y

In the past, a num-berV of attempts have been made to improve beater efficiency, but hitherto none has met with any marked success. principal reason for this failure to achieve improvedy efficiency inconventional beaters is the requirement for excessive circulation of stock under the beater roll. Conventional beaters ernploy a cell spacing in the beater roll of about 2-21/2 inches; the smallestfhitherto known to be commercially feasible being 1.18 inches. With such cell spacing, an excess of stock must be carried by each cell in order to maintain sufficient stock between the beater roll and bed plate bars to avoid destructive treatment of the stock. However, with smaller cells conventional beaters are inoperative. l

I have discovered that striking improvements in eihciency may be attained by employing al cell spacing Yof less than one inch and by feeding stoel: to the roll under velocity and'in quantity sufficient only to cover the bar edges enough-to prevent destructive treatment of stock. With'such small cells, substantially all of the stock carried by each. cell in the beater roll receives beating Y tr'eatnlentk during each pass under the beater roll, and little or no stock4 is carried merely for circulation.

Itis an object of my invention to provide a beater wherein the beater roll is relieved of the function of circulating, and wherein substantially The . v2 all of the stock which passes .under the beater roll receives beater treatment. I

Among the features of my invention `is a beater roll having a cell spacing of less than one inch. Another feature of my invention is the provision of apparatus for controlling the flow of stock to the beater roll under velocity and .ina small quantity suiiicient only to cover the edges of the bars which define the said small cells.

Other objects and novel features of the ccnstruction and arrangement of parts comprising my improved machine will appear asv the descrip-1 tion ofthe invention progresses.

In the accompanying drawings illustrating a preferred embodiment of my invention:

Figure 1 is a longitudinal sectional elevation through a pulp beater in accordance with my invention;

Figure 2 is a top plan View thereof;

Figure 3 is a fragmentary sectional elevation showing a portion of a beater roll and associated bed plate bars of a conventional beater;

Figure 4 is a comparative View, similar to Fig. 3, showing a machine made according to my present invention; and

Figure 5 is a sectional end elevation showing a machined roll bar and cell.

Referring to the drawings, It designates a tub, preferably rectangular inkplan view, and with a longitudinal wall I I extending upwardly from the bottom thereof. This wall terminates short of the Vends of the tub, thus forming in the tub Iii two parallel passages I2 and I3 extending longitudinally of the tub Ill and communicating `with. each other at their ends.

Located in one ,of the passages is a mixing propeller Ill, the function of which is to thoroughly mix and blend the fiber, and/or color, size, clay or other material with water to constitute the pulp or stock to be treated. During the mixing operation, the propeller E4 driven by a suitable motor diagrammatically illustrated at fili circulates the stock out of one end of the passage I2, around the adjacent end of the partition wall il, and into one end of the passage i3, and simultaneously draws. the stock from the other end of the passage I3, around the other end of the partition Wall, and into the passage I2.

Locatedy at apoint remote from the tub Iii is a base I5 of concrete or other suitable material. The upper surface of the base I5 is concave and centrally located thereon is a bed plate It, the upper surface of which lies in a circular arc, the center of which is concentric to the center of the beater roll shaft 2l carrying a beater roll 22.

Mounted on the upper curved surface of bed plate I6 and arranged parallel to each other is a plurality of fixed bed plate bars I1. At the input side of the beater roll is a plate I8 forming part of the intake for said roll. At the output side of the beater roll is a plate I9 which extends upwardly to the top edge of the base I and then extends downwardly to form the backfall plate 2U, the lower edge of which rests on and is supported on the adjacent wall of the tub.

The beater roll shaft 2l is mounted for rotation in suitable bearings above the bed plate and is driven at the desired speed from any suitable power source 40. The beater roll 22 has on its peripheral face a plurality of parallelly arranged roll bars 23, which may be spaced by woods 36, as in Fig. 4, or machined integral with the roll 22, as shown in Fig. 5.

Over the top of the roll 22 is a curved hood 24, the forward edge of which is connected to the top edge of a deflecting plate and the lower edge of which rests on the top of the partition wall Il. The forward edge of the hood 24 and the meeting edge of the plates I9 and 20 form a discharge orice 25 at the output side of the beater roll.

At the input side of the beater roll the curved hood 24 joins the upper rounded end of a member 21, which with the plate I8, forms an entrance passage 28 for the stock coming to the'roll. Another suitable input arrangement is disclosed in my co-pending application Serial No. 34,269, led on June 2l, 194B.

Member 21 and plate I8 extend downwardly and their lower ends are connected by flange 29 to the anged upper end of a pipe connected to the discharge side of a pump 3l. The intake side of said pump connects with a dump opening 33 in the tub. Pump 3l may be driven from any suitable power source, such as diagrammatically illustrated motor 42 at any desired speed to thereby regulate the amount and pressure of the stock delivered to the roll 22 through the intake 28.

The beater roll may be enclosed in any suitable manner. This roll may have a face width of 48 inches, or any other desired width.

The cells 35 in the roll bars may be spaced center-to-center less than one inch of the periphery of the roll, that is, I may use a small roll cell in which the minimum number of bars is approximately 31/6 times the diameter of the roll, and the maximum number is approximately 122/3 times the diameter of the roll. That is, the cell spacing may be less than 1 inch and greater than about .25 inch. If the spacing is greater than 1 inch, then an excess of stock is required to keep the bar edges sufficiently covered to prevent destructive treatment, and eiciency falls off rapidly. The minimum spacing of .25 inch represents the threshold below which stock simply blocks the cells.

The small size cells have a number of advantages over the larger cells customarily used (see Fig. 3) in that the fibers being treated in the small cell circulate in a shorter path travel and thus come into engagement with the bed plate bars many times more frequently than in the larger cells, and hence the treatment for each revolution of the roll is greater and the amount of ber carried less in the small cell than in the large cell. This reduces considerably the horsepower hours per ton required to properly beat the stock and therefore provides a more eiiicient,guseful and improved unit. If desired (see Fig. 5) I may 4 machine the cells in the bars, giving each cell a rounded formation as at 31 to eliminate the square corners 3B of the conventional cell. This circular shape permits the fiber to ll all areas of the cell, as shown in Fig. 5, and improves the circulation of the fibers within the cell.

In operation, the pulp fiber, colorl size, alum, clay, water, and/or other materials to form a batch or charge are placed in the tub i0 and power is applied to rotate the mixing propeller I4 and thereby mix or blend the various ingredients together. 'Ihe beater roll 22 is now started and when the pump 3| is also started, the mixed and blended material in the passage l2 of the tub is drawn through the discharge orice 33 and delivered to the roll 22 through the entrance passage 28. rAs the roll 22 rotates the mixture is caught in the roll cells 35 and drawn over the bed plate bars l1 to thereby cut, brush, bruise, fray, lbrilate or otherwise treat the fibers until they are in the proper condition to make a paper sheet.

It will be obvious that my improved beater roll may be sold as a separate unit to be installed in a paper mill in connection with an existing tub, either adjacent to it or if desired remotely located from it.

It will also be obvious that while I have shown a pump for transferring the stock from the tub to the inrunning side of the beater roll, other transfer or conveyor means may be used.

These and various other modifications may be made without departing from the spirit and scope of my invention as dened by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A beater for pulp comprising, in combination; a rotatable beater roll, means for rotating said roll, a bed plate having bars thereon positioned below said roll, bars about the periphery of said roll spaced to dene cells having a size greater than .24 inch and less than 1 inch, and means for delivering stock under velocity to said roll, in a quantity sucient only to cover the bar edges of said roll and said bed plate.

2. A beater forpulp comprising, in combination; a rotatable beater roll, means for rotating said roll, a bed plate having bars thereon positioned below said roll, bars about the periphery of said roll spaced to dene cells having a size greater than the .24 inch and less than 1 inch, a declining plate stock approach to said roll positioned adjacent to and terminating in close proximity to said roll and said bed plate, and means for delivering stock under velocity to said roll in a quantity sucient only to cover the bar edges of said roll and said bed plate.

3. A beater for pulp comprising, in combination; a rotatable beater roll, means for rotating said roll, a bed plate having bars thereon positioned below said roll, bars about the periphery of said roll spaced to define cells having a size greater than the .24 inch and less than 1 inch, a declining plate stock approach to said roll positioned adjacent to and terminating in close proximity to said roll and said bed plate, and means including a pump for delivering stock under velocity `to said plate, and hence to said roll, in quantity suicient only to cover the bar edges of said roll and said bed plate.

4. A beater for pulp comprising a rotatable beater roll, means for rotating the beater roll, a bed plate associated with the beater roll, a tub,

v 6 a pump, ducts, the beater roll and bed plate belnlgl UNITED STATES PATENTS located apart from the tub and being fed throug the ducts by the pump, said beater roll havnga Nugzro Norn Sept'nf 81883 plurality of bars thereon defining cells spaced less Y 1 479 382 y Hanks et al Jan. 1 1924 than 1 inch by 1 inch, and at least .24 inch, said 5 1947'449 Milne Feb 13' 1934 pump being controllable independently of the 2961'662 Knoll Nov' 24' 1936 beater roll to supply pulp to said roll, at any given 2:126264 Knoll Aug 9' 1938 speedof rotation thereof, in a quantity and sullcient only to cover the bar edges of said roll. FOREIGN PATENTS 10 Number Country Date FRANK HAYES- 238,278 Great Britain Aug. 1o, 1925 OTHER REFERENCES REFERENCES CITED A study of the seater by Mime, pubiisnea by The following references are of record in the 15 E D, Jones sz sons C0., Pittseld, Mass., pp. 25, flle of this patent: 35, and 37.

Tappi Bulletin No. 54, June 15, 1945.