US1120636A - Barking-mill. - Google Patents

Description

W. A. WHITGOMB.

BARKING MILL.

APPLICATION FILED MAY 8,1914. 1,120,636. Patented Dec. 8,1914.

2 SHEETS-SHEET1.

M WJ/Mm m W454 103%. 57 7 ZZ;.

W. A. WHlTCOMB.

BARKING MILL.

APPLICATION FILED MAY 8, 1914.

1,1 20,636. Patented Dec. 8, 1914.

2 SHEETS-SHEET 2.

Win 33 596',

WILLIAM A. WHITCOMB, OF MILLINOCKET, MAINE.

EARRING-HILL.

' Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed May 8, 1914. Serial No. 837,327.

To all whom it may concern Be it known that I, WILLIAM A. WHIT- com, a citizen of the United States, residing at Millinocket, in the county of Penobscot and State of Maine, have invented an Improvement in Barking-Mills, of which the following is a specification.

This invention relates to barking-mills for removing bark from logs or blocks of wood, which are used in the production of pulp in the manufacture of paper, and is an improvement upon the barking-mill forming the subject-matter of an application for Letters Patent-- #802,586, filed November 24 1913, of Garret Schenck. in the machine 0 said application the blocks of wood are tumbled while in a dry state, and by the tumblin action the bark is removed from the bloc s, and during the tumbling operation the detached dry bark is-segregated from the blocks by gravity. Said machine is a wide step in advance over prior me.- chines of this character, and has resulted in a substantial savin in the expense of preparing the blocks or the grinders, and the wood is not chipped, scraped or cut ofi of the block, and the bark, which is removed is in a dry state and has a value for fuel. In some instances the blocks are smeared with dirt and sometimes small pieces or patches of bark still cling to the blocks which it is desirable to remove, and sometimes the bark which has been removed sticks to the blocks, and I have discovered that b washin the debarked or substantially de arked blocks with water the dirt and loose pieces of the bark may be removed, and the blocks thus better and more completely prepared for presentation to the grinders.

This invention has for its object the provision of means for washin the blocks after the have been debarke or substantially de arked by the apparatus of the aforesaid application and the association of said means with said apparatus whereby.the operation of debarking'and of washing becomes a continuous one.

M invention, in so far as its method is invo ved, consists in debarka'ng the blocks while in a d state b a tumbling action, segregating te detac ed bark from the blocks by gravity during the debarlsing or tumblin operation, and then waslnn the debarlred or substantially'debarked b ocks,

the entire operation being a continuous one.

One form of apparatus by which the present invention is carried out, which is here shown for illustration, comprises a rotatable tumbling-chamber arranged in a slightly inclined position into which the blocks are delivered at one end and from which they are discharged at the other end, said chamber having 0 enings at intervals to admit of the escape oi the detached pieces of bark, which are segregated from the blocks and caused to escape by gravity, and another rotatable tumbling-chamber arranged in continuation of' the aforesaid chamber at the discharge end thereof, into which the blocks are delivered at one end and from which they are discharged at the other end, said chamber being artiallv submerged in a tank of water, so t at the blocks are tumbled in the presence of water, and the dirt and the small pieces of bark are removed, thus cleansing the blocks and preparing them in the best possible condition for presentation to the grinders, the a paratus being constructed and arrange in such manner that the entire operation is a continuous one.

Figure 1 is a side elevation of a barkingmill embodyin this invention. Fig. 2 is a left-hand end e evation of the same. Fig. 3 is a transverse vertical section through the wet tumbling-chamber. Figs. 4 and 5 are plan and sectional views of a portion of the mill, illustrating the preferred form of driving-means for the wet tumbling-chamber. Figs. 6 and 7 are plan and sectional views of a like portion of the mill, illustrating another modified form of drivingmeans for the wet tumbling-chamber.

In the embodiment of my invention shown in Fig. 1, the dry tumbling-chamber and the opcratin means are substantially as shown in the a oresaid application, and consists of three cylindrical pipe-sections 10, 12 and 14:, although an other number may be employed. Eac section may be composed of several short cylindrical sections of pipe, telescopically arranged and secured together, or they may be otherwise constructed. The several pine-sections 10, 12 and 14 are arranged in alinement to enable the blocks to move from one to the next section throughout the entire len h of the dry tumbling-chamber and sai sections are arran ed in a slightly inclined position to faci itate such movement of the locks, and they are separated from each other short distances to provide annular openings for the escape of the dry ieces of bark which are removed from the locks, but it will be obvious that openings may be otherwise formed at intervals for this purpose. The interior of the pipe-sections are preferably made smooth, which admits of the blocks being easily moved along in a direction toward the exit, and prevents clogging of theblocks and chipping of the wood. In said dry chamber, as represented'in Fig. 1, the right-hand end thereof is the inlet, and at said end-an annular plate 18 is secured having a center-hole 20, through which the wood blocks are fed in. Said plate partially closes the end of the pipe-section to which it is attached, and serves as a retainingplate for the blocks.

The left-hand end of the dry-chamber is the exit and at said end an annular plate 22 is provided, having a center-hole 24 through which the wood blocks are discharged. Said plate partially closes the end of the pipe section to which it is attached, and serves as a retaining-plate for the blocks. Said plate 22 is not attached directly to the end of the pipe-section as is the plate 18, but is supported in fixed position in front of said pipe-section by brackets 26, thereby providing an opening between the end of the pipesec tion and the plate for the escape of the pieces. of dry bark, said opening being substantiall the same as the openings efore describe which are arranged at intervals along the chamber. Each pipe-section has arranged on its circumference flanged rings 30, there being two such rings shown on each pipe-section which are arranged in parallel relation, and disposed near the ends of the sections, and said rings rest upon flanged rollers 32 secured to shafts 33, which are positively rotated. The weight of the pipesections, particularlv when loaded with the wood blocks, is sufiicient to enable them to be rotated by frictional engagement with the rotating rolls, although in lieu of friction gearing such as described any other form of gearing may be employed for rotatin the pipe-sections. As here shown, it will be noted that the pipe-sections are made independent of each other and are, therefore, independently rotatable, but ordinarily they will be rotated in unison, as they are rotated b means common to all of them, but indepen ent rotation of the sections, instead of being a disadvantage, is an advan tage as the blocks which extend across the openings are so interlocked with other blocks in the secti ns that inde endent movement of one section relative tot eother will accelerate the tumbling of the blocks.

At the discharge end of the dry tumblingchamber the Wet tumbling-chamber is arranged, it being made as a pipe-section 40 composed of several short cylindrical sections of pipe telescopically arranged and sehaving left-hand end is the outlet, and the inlet is arranged in front of the outlet of the last section of the dry tumbling-chamber to re ceive the debarked or substantiall debarked blocks which emerge from sai chamber. At the left-hand end of the wet tumblingchamber an annular plate d1 is provided a center-hole 42 with a lon 'tudinall extended flange ea thereat." Sai pipesectlon 40 has arranged on its circumference flanged rings 45, 46, there being two such rings here shown, which are arranged in parallel relation and disposed near the ends of the section and rest u on flanged rollers 47 secured to shafts t8 w ich are positively rotated. The weight of the section, partic larl whgn loaded with blocks, is usually su cient to enable it to be rotated by frictional engagement with the rotating rolls, but in lieu of friction gearing such as described, other forms of gearing may be employed, as represented for instance in Figs. 4 to 7, and should be so employed if any trouble from slipping arises. Said pipesection 40 is arranged in a tank 50 which is arranged to be supplied with water by a pipe 51 or other means to a predetermined level, and has an outlet at 52 and when thus arranged in said tank it is partially 'submerged so that the blocks at the bottom thereof are tumbled in the water. Atthe outlet of the wet tumbling-chamber a conveyer is here shown at 60, which receives upon it the washed blocks and b which they are carried up a chute for de ivery to any desired place or laces, as for instance, they may be delivere to a room containing the grinders, or may be delivered to a room containing a splitter, or may be delivered no elsewhere.

From the general description above, it will be understood that many of the struc tural features of the apparatus may be altered without departing from the spirit and scope of my invention.

In Figs. 4 and 5 a sprocket-chain drivingmeans is illustrated which I have found effective, and in Figs. 6 and 7 a. toothed gear driving-means is illustrated, these methods being among the many which may be employed in lieu of frictional gearing shown in Figs. 1 to 3.

The operation of the mill is as follows: While the tumbling-chamber is rotating the wood' blocks are fed in through the centerhole in the retaining-plate at the upper end and are caused to tnmble--overand uponeach other, and against the wall of the chamber and to move along to the lower end thereof, where they are discharged through the center-hole in the retainingplate thereat, and while being tumbled and moved alon the bark is removed in a dry state from t em, and the pieces of dry bark fall by gravity through the openings, being thus segregated from the blocks. The dry debarked or substantially debarked blocks then pass continuously from the dry tumbling-chamber to the wet tumbling-chamber, whereupon they are caused to tumble over and upon each other and against the wall of the chamber and to move along to the outlet end thereof to be discharged upon a conveyer and while tumbled about in said wet tumbling-chamber they are washed and cleansed.

I claim 1. The process herein described of debarking blocks which consists in removing the bark from the blocks while in a dry state by a tumbling action, segregating the detached bark from the blocks by gravity, during the debarking operation, and washing and thereby cleaning the debarked or substantially debarked blocks, the entire op eration being continuous.

2. The process herein described of debarking blocks which consists in subjecting the blocks while in a dry state to a tumbling action, thereby to remove the bark therefrom,-and segregating the detached bark from the blocks by gravity at intervals duringthe tumbling action, then further removing the bark from the blocks in the presence of water by a tumbling action and segregating the bark thus detached from the blocks, the entire operation being continuous.

3. A barking-mill consistingof a rotatable dry tumbling-chamber arranged to receive and tumble the blocks in a dry state,

and a rotatable wet tumbling-chamber located at the discharge end of said dry chamber in continuation thereof and arranged to receive and tumble the blocks in a wet state. substantially as described.

4. A barking-mill consisting of a rotatable dry tumbling-chamber arranged to receive and tumble the blocks in a dry state and having openings for the escape of the dr) bark, and a rotatable wet tumblingcliamber located at the discharge end of said dry chamber in continuation thereof and arranged to receive and tumble the blocks in a wet state. substantially as described.

.3. .X barking-mill consisting of a rotatable dry tumbling-chamber arranged to re ceive and tumble the blocks in a dry state and having openings for the escape of the dry bark. and another rotatable tumblingchainber located at the discharge end of said dry chamber in continuation thereof, and a tank for containing water in which I said chamber is partially submerged, said chamber being arranged to receive and tum ble the blocks in a wet state, and means arranged to provide for the supply and escape of water to and from said tank, substantially as described.

6. A barking-mill consisting of a rotatable dry tumbling-chamber arranged to receive and tumble the blocks in a dry state and having openings for the escape of the dry bark, and another rotatable tumblingchamber located at the discharge end of said dry chamber in continuation thereof, and a tank for containing water in which said chamber is partially submerged, said chamber being arranged to receive and tumble the blocks in a wet state, and frictional drivingmeans co-extensive with all said chambers for rotating them and permitting independent rotation thereof, substantially as described.

7. In a barking-mill, the combination of a plurality of cylindrical open-ended rotatable pipe-sections arranged in alinement and in a slightly inclined position having open spaces arranged at intervals, and another open-ended rotatable pipe section arranged at the discharge end of the aforesaid pipesections, a tank for containing water in which said last-named pipe-section is partially submerged, and driving means for the sections, substantially as described.

8. In a barking-mill, the combination of a plurality of openended pipe-sections ar ranged in alinement and in a slightly inclined position, separated from each other short distances to provide open s aces between them, and another open-en ed pipesection arranged at the discharge end of the aforesaid pipe-section, a tank for containing water in which said pipe-section is partially submerged, and a common driving-means to rotate all said sections, with which they are frictionally connected, permitting independent rotation thereof, substantially as described.

9. In a barking-mill, the combination of a plurality of open-ended pipe-sections an ranged in alinement and in a slightly inclined position and separated fromeach other to provide open spaces between them, and another open-ended pi pe-section arranged at the discharge end of the aforesaid pipe-sec tion, and at a lower elevation, a tank for containing water in which said last'named pipe-section is partially submerged, and driving means for said sections, substantially as described.

10. A barking-mill consisting of a rotatable dry tumbling-chamber arranged to receive and tumble the blocks in a dry state, and having at its exit an annular retainingmember, and a discharge opening immediately in rear thereof, a rotatable wet tumbling-chamber located at the discharge end of said dry-chamber, but at a lower eleva- 1,12o,ese

tion, a tank containing water in which said name to this specification, in the presence of last-named tumbling-chamber is partially two subscribing witnesses.

submerged, over the top of which said annum w lar retaining-member extends, and driving- WILLIAM ITCOMB' 5 means for said chambers, substantially as Witnesses:

described. WILLIAM O. Meir, In testimony whereof, I have signed my Guy CUNNINGHAM.

Images