US1338869A - Tub-beater - Google Patents

Description

J. E. SALSMAN.

,TUB BEATER.

AP ueAnoN FILED/Win29. 1918.

1,338,869. Patented May 4,1920.

2 SHEETS-SHEET 2.

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- UNITED STATES PATENT oFmoE.

JAMES SALSMAN, 0F CRESCENTVILLE, OHIO,ASSIGNOR OF ONE-TWELFTH TO ROWE AND FIVE-TWELFTHS TO HAROLD W. NICHOLS, BOTH OF CINCINNATI, OHIO,

AND ONE-EOURTH TO HARRY B. JONES, ARLINGTON, OHIO.

TUB-BEATER.

Beaters, of which the following is a full, clear, and exact description, reference being 7 hadto the accompanying drawings, form lug [part of this specification. v y invention relates to improvements in the construction of the ordinary tub beaterv which in paper mills is employed forthe re- 7 duction of paper stock to pulp of the-desired condition for use in the subsequent paper 'making processes. The ordinary method consists in grinding and beating up the paper stock with water in an oblong tub and continuing the process until the entire mass has been reducedto the proper consistency.

Efi'orts in the past have been made to provide devices with which, witholit nter- 'rupting the grinding of the stock, the finished materialmay be drawn off while fresh paper stock is added to the beater so that without stopping the machine the process may be continuous and the finished stock may be removed continuously, but my 111- vention has the advantage .of working on much more varied grades of stock and without becoming continually clogged when on certain rough or cheap'grades of stock.

It is the'object of myv invention to. provide a novel separator which will be free from the objections heretofore encountered, to be applied to the ordinary tub beater without change or modification thereof, by which the finished stock may be continuously withdrawn from the beater without stopping the beater, and with which devices in' the preferable construction, the movement of the stock in the beater may be accelerated and the finished stock prepared in less time than with the 'ordinar apparatus, and in which less power an close application of grinding surfaces are reouire l in the drawings,

Figure 1 isa top plan view of the beater, with my improvements applied thereto.

. s Fig. 2 is an end elevation.

' Fig.3 is a perspective view of the appa ratus for extracting the finished stock.-

Specification of Letters Patent.

not so Fig. 4 is a-plan view of thesame, with the cylindrical casing removed.

Fig. 5 is an end elevation, with the end wall removed.

The ordinary elon ated tub 1 is provided with the usual mideather 2 to permit circulation of the paper stock as it passes under the beating roll 3, which is mounted on- .the shaft 4 suitably journaledacross the 'middle of the machine and driven in any ordinary way, usually by belt 5 and pulley 6. The beating roll 3 is provided with the usual knives 19 which cooperate with the usual bedplate in the bottom of the machine forcutting and tearing up the paper stock, and the material is carried over the usual back-fallv 7 and circulates slowly around the mid-feather in the direction of the arrow and back again to the beating roll. The stock is usually introduced at oneend of the tub, where water for digesting the material is also introduced. There is also indicated at 8 an additional water pipe for supplying streams of water to the material I Patented May 4, 1920. Application filed April 29, 1918. X Serial No. 231,387.

just before it passes under the beating roll. I 7

All the foregoing are the ordinary and usual constructions of tub beaters which have long beer; in usef In order to withdraw the finished stock continuously, I provide acylindrical separator 9, which is mounted on the shaft 10,

one end of which is journaled on the midfeather, and the other journal is located on the side of the tub. This shaft with the cylindrical separator is driven in any "ordinary way from the power pfa'na-as indicated by the belt 11 and pulley 12. The cylindrical separator is in its internal construction made up of circular heads oriends 13, 14, with longitudinal partitions 15, 15,

dividing the cylindrical space into a number of compartments. As a preferable construction, I employ six of these radial partitions, making six compartments in the complete cylinder. The floor or bottom of these compartments slopes from one end of the cylinder near the periphery at 16 downwardly toward the axis of the cylinder at 17 at the other end. The chambers of the cylinder are covered and inclosed by a smooth cylindrical casing 20 preferably of sheet metal or any other suitable material, while .the casing isto be smooth on the outslde.

The casing is provided with a series of per forations or openings 21, with the longitudinal rows arranged in staggered relation to each other,-and where six compartments are provided there are six sets of these perforations with intermediate unperforated portions. The cylindrical casing is so applied that the perforated portions will lie for the most part on the upper side and some distance above the respective partitions 15 so that the unperforated portion of the cylinder will form with the partitions 15 pockets to receive and hold the material which enters through the openings as the separator is rotated in the stock, as will be hereinafter described. Each of the compartments is provided with an opening at its lower or delivery end and the side wall of the tub forms 'a closure for these openings when below the top edge of the tub, while the edge at the lowering the arm, the gate will be openedand shut, the gate being guided in the framework 23. Outside'of the tub to receive the material discharged from the separator through the gate any convenient arrangement may be provided for carrying off the finished stock for subsequent treatment in the paper making processes. I have illustrated a trough 25 for carrying off the material. 7

Secured across the rear side of the cylinder running longitudinally therewith and bearing against the cylinder, is a scraper 26 of any convenient form. I have illustrated a bar or doctor, but stiff wire brushes may be employed, or other means for removlng from the cylinder as it is rotated any strings,

rope lor other materialthat may have a tendency to clog the perforations. As illustrated in the-drawings, the scraper bar is mounted one pair of rock arms 27, pivoted at the upper edge of the tub and the midfeather, and coiled springs 28 hearing on these arms outside the fulcrum point tend to hold the scraper with spring pressure against the cylinder, to permit it to give against any too great accumulation.

With the perforated cylinder mounted as described, it is slowly rotated in the pre ferred method in the direction of the current of the material caused by the action of the rollbeater, at a speed slightly in excess ofthe flow'that would be created by the beater alone, so that the rotation of the roll has theefi'ect of accelerating the flow. The surface of the cylinder being smooth, the

finished stock by the movement of the cylin der is pushed through the perforations into the compartments of the cylinder, is carried up to the top of the cylinder by the pockets formed between the partitions and the unperforated portion of the cylinder and flows down to the gate whence it is deliveredinto the trough 25. It will be understood, however, that the cylinder may be rotated in the opposite direction. I

. Inasmuch as the cylinder is smooth and circular in cross section, any strings or'material that would clog the perforations is removed and drops back into the current to be carried again to the beater roll The smoothness of the surface assists in preventing the carrying over the cylinder or accumulation on. the cylinder of surplus material and tends to regulate the amount and evenness of flow into the interior.

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

1. In a tub beater, a separator for the finished stock comprising a hollow 'cylindrical roll mounted transverse the tub and adapted to be rotated in the paper stock, said cylinder having a smooth exterior, with perforations for the cylinder of a size to allow the finished stock to enter the cylinder and reject the unfinished stock, and means for discharging same therefrom.

2. In a tub beater, a separator for the finished stock comprising a hollow cylindrical roll mounted transverse the tub, partially submerged in the contents thereof, and adapted to be rotated in the paper stock, said cylinder having asmooth exterior, with perforations for the cylinder of a size to allow the finished stock to enter the cylinder during the rotationthereof and reject I the unfinished stock, and means for discharging same therefrom.

3. In a tub beater, a separator for the finished stock comprising a hollow cylindrical roll mounted transverse the tub and adapted to be rotated in the paper stock, said cylinder having a smooth exterior, withthe interior divided into a series of compartments, with perforations for the cylinder of a size to allow the finished stock to enter the cylinderduring the rotation thereof and reject the unfinished stock, and means for dis charging same therefrom.

4. In a tub beater, a separator for the finished stock comprising a hollow cylindrical roll mounted transverse the tub and adapted to be rotated in the paper stock, said cylinder having a smooth exterior, with the interior divided into a series of compartments by longitudinal partitions having floors inclined toward one end of the cylinder, with perforations for the cylinderof a size to allow the finished stock to enter the cylinder during the rotation thereof and 6.- In a tub beater, the combination with the beater, of a separator for the finished stock comprising ahollow cylindrical roll mounted transverse the tub, artiall merged in the contents thereof and a apted to be rotated in the paperi stock, saidecylinder having a smooth exterior, with the interior divided into a series of compartments by longitudinal partitions and having floors inclined toward one end of the cylinder, with perforations for the cylinder to allow the finished stock to enter the compartments alternating with blank portions to serve as pockets-with the partitions to hold the stock and carry it to the upper portion of the cylinder, said perforations being adapted to-- reject the unfinished stock, and means for discharging the Same therefrom.

7. In a tub beater, the combination with the beater, of a separator for the finished stock comprising a hollow cylindrical roll mounted transverse the tub, artially submerged in the contents thereof? and adapted to be rotated in the paper stock, said cylinsubder having a smooth exterior, with the interior divided into a series of compartments by longitudinal partitions and having floors inclined toward one end of the cylinder, with perforations for the cylinder toallow the finished stock to enter the compartments alternating with blank portions to serve as pockets with the partitions to hold the stock and carry it to the upper portion of the cylinder, means for discharging the same therefrom, and with means for preventing .the clogging of the perforations during the,

o eration.

8. In a tub beater, the combination with the beater, of a separator for the finished stock comprising a hollow cylindrical roll mounted transverse the tub, partially submerged in the contents thereof, with one head for the cylinder rotating therewith and the other head stationary, with the tub provided with a gate therein, and the cylinder adapted to be rotated in the paper stock, said cylinder having a smooth exterior with the interior divided into a series of compartments by longitudinal partitions and havingfioors inclined toward one end of the cylinder, with perforations for the cylinder to allow the finished stock to enter the compartments alternating with blank portions to serve as 1pockets with the partitions to hold the stoc and carry it to the upper portion of the cylinder, and with means for preventing the clogging of the perforations during the operation.

JAMES E. SALSMAN.

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