US3136345A

US3136345A - Barking drum

Info

Publication number: US3136345A
Application number: US109310A
Authority: US
Inventors: George M Dick
Original assignee: Ibis Enterprises Ltd
Current assignee: Ibis Enterprises Ltd
Priority date: 1961-05-11
Filing date: 1961-05-11
Publication date: 1964-06-09
Anticipated expiration: 1981-06-09
Also published as: GB937370A; CH392854A; DE1202470B; FR1323913A; DE1199965B

Description

G. M. DICK BARKING DRUM June 9, 1964 2 Sheets-Sheet 1 Filed May 11, 1961 INVENTOR GEORGE M. DICK \wm HIS ATTORNEY G. M. DICK BARKING DRUM June 9, 1964 2 Sheets-Sheet l Filed May 11 INVENTOR GEORGE M. DICK BY \mmm HIS ATTORNEY United States Patent 3,136,345 BARKING DRUM George M. Dick, Sherbrooke, Quebec, Canada, assignor, by mesne assignments, to Ibis Enterprises Limited, Hamilton, Bermuda, 2 body corporate of Bermuda Filed May 11, 1961, Ser. No. 109,310 4 Claims. (Cl. 144-208) This invention relates to log barking apparatus and particularly to that type of apparatus in which is provided a drum adapted to receive the logs and to rotate for tumbling the logs about thereby loosening the bark and cleaning the logs therefrom for further processing.

It is an object of this invention to provide a reliable and effective barking drum which is particularly useful in disposing of the bark particles and which is easily kept in order and regulation. 7

Other objects and advantages of the invention will be in part obvious and in part pointed out hereinafter.

The drawing illustrates a preferred embodiment of the invention and includes FIGURE 1, a plan view of a barking drum, portions being cut away to show the interior construction in part;

FIG. 2 is a cross section taken along the line 22 of FIG. 1 looking in the direction of the arrows; and

FIG. 3 is a cross section of the barking drum at the discharge end taken along the line 3-3 looking in the direction of the arrows.

FIG. 4 is a cross sectional view along the lines 44 I of FIGURE 1 in the direction of the arrows illustrating the flow of the logs in the drum.

Referring to the drawing, the barking apparatus has a horizontally disposed cylindrical drum 10 which in this instance is composed of two

adjoining parts

12 and 14 for the sake of flexibility and convenience in handling. Such drums are usually quite long as for instance forty to fifty feet and while they might be made in one section it is preferable for convenience in erecting, maintenance and manufacture that they be made in the two

sections

12 and 14 as illustrated.

Each section is adapted to rotate and for this purpose it is provided with a pair of tires 16 on bearings spaced apart as shown in FIG. 1 and FIG. 3 each bearing comprising a trunnion roller 18 having a trunning shaft 20 mounting in bearings 22 and supported on a foundation 24 by side plates 26. Side plates 26 are connected by tie rods 28, see FIG. 3, which are lengthwise adjustable at their ends 30 as to length so that the height of drum section 12 at any tire 16 may be suitably regulated by taking up or lengthening tie rod 28 at the suitable point. In addition drum section 12 has a plurality of points in this instance two at which it is provided with ring gears 32

encircling sections

12 and 14 and meshing with main pinions 34 mounted on a drive shaft 36 extending longitudinally beside drum 10 and guided in suitable bearings 38 set upon a part 40 of foundation 24. Means is provided for driving shaft 36 including reduction gearing 42 associated with the drive shaft 44 of a suitable motor (not shown).

Transversely disposed with respect to

sections

12 and 14 of drum 10 are

heads

46, 48, 50 and 52. These heads are provided with apertures of successively increasing size and circular in outline concentric with drum 10. Thus, head 46 is provided with the .smallest aperture 54, head 48, which in this instance is composed of two plates, one on section 12 and the other of similar size on section 14, a larger aperture 56. Head 50 has a still larger aperture 58 and head 52 which is at the discharge end of drum 10 has the largest aperture 60. Thus between head 46 and head 48 is provided a compartment having a relatively small inlet at aperture 54 Patented June 9, 1964 "ice and a discharge aperture 56, slightly larger in size. The compartment within section 14 between head 48 and head 50 has aperture 56 as its inlet and the slightly larger aperture 58 as its discharge, while the very much shorter end section or compartment between head 50 and head 52 has as its inlet aperture 58 and the aperture 60 as its discharge. The relative sizes of these parts and their purpose will be explained.

Drum 10 is adapted to receive logs to be barked and water at aperture 54. The logs are adapted to be tumbled about in section 12 of drum 10 in the process of which the bark on the logs is abraded, ground up and floated off through the discharge aperture 56 into section 14 of drum 10. To facilitate the abrading action longitudinal staves 62 parallel to the axis of the cylindrical drum section 12 are mounted on the inner periphery of section 12 and they not only by their preferred shapes abrade the log bark but they assist in the leg tumbling by catching the short lengths of the logs customarily used in this operation. As the drum 10 rotates the staves 62 move these log sections upwardly in the direction of rotation,

of the drum, such movement resulting in a cascade of log sections against one another and producing the desired action for removal of the bark from the logs and reducing such bark into small fragments. There is no escape for the water introduced into the drum section 12, by way of pipes 13a (FIG. 4), except through the aperture 56 at the discharge end and the pulverized bark as well as the logs passes from section 12 into section 14. In this section and particularly that part between

heads

48 and 50 continues the operation as hereinbefore described, there being additional staves 64 preferably more numerous than staves 62 and with suitably curved faces. Since aperture 58 is larger than aperture 56 there is a flow of liquid and suspended bark in the direction of head 50 and thence into the final compartment of drum 10 which has a sieve-like action permitting escape of the water and therein suspended bark particles entering past head 50. Thus it will be seen that as said liquid spills from each of the apertures to the adjacent larger aperture it generates a flow to push the logs being debarked and the bark from compartment to compartment in the direction of the discharge end of the drum 10 as shown in FIGURE 4.

For this purpose discharge compartment between

heads

50 and 52 is somewhat differently constructed in that it terminates in a portion which consists of the U-shaped bars or staves 66 which extend beyond the imperforate wall of section 14 and are welded to a head 68 supporting head 52 and a ring 70 mounted thereon. The liquid entering the end compartment of drum section 14 will flow out and wash with it the greater part of the bark between staves 66, while the barked logs pass out through aperture 60 and are separately collected by suitable means (not shown).

Thus, as the water and logs progress through the compartments from the entrance at aperture 54 to the discharge aperture 60 there is sufiicient water contained and retained within the greater part of the drum to prevent packing up of the bark particles which has the effect of facilitating the bark removal, the bark particles being furthermore flushed out very effectively.

Thus, by the above construction are accomplished, among others, the objects hereinbefore referred to.

I claim:

1. Log barking apparatus comprising a horizontally disposed cylindrical drum having an inlet end for receiving logs to be debarked, means for supplying fluid to said inlet end, and a discharge end, and a plurality of transversely disposed heads spaced apart within said drum from the inlet end to the discharge end to form successive intercommunicating compartments within the drum, each head being provided with a'circular central aperture, such apertures being successively larger in the direction of the discharge end, so that saidfiuid spills from each of said apertures to the adjacent larger aperture to generate a flow to push said logs being debarked in the direction of said discharge end, the peripheral Walls of all of said compartments being imperforate except at the final compartment at the discharge end, that final compartment being relatively short with respect to any other said compartment and provided with openings in its periphery forming a cylindrical screen.

2. Log barking apparatus comprising a horizontally disposed cylindrical drum having an inlet end for receiving logs to be debarked, means for supplying fluid to said inlet end, and a discharge end, and aplurality of transversely disposed heads spaced apart within said drum from the inlet end to the discharge end to form successive intercommunicating compartments Within the drum, each head being provided With a circular central aperture, such apertures being successively larger in the direction of the discharge end, so that said fluid spills from each of said apertures to the adjacent larger aperture to generate a flow to push said logs being debarked in the direction of said discharge end, the peripheral walls of all of said compartments being imperforate except at the final compartment at the discharge end, that final compartment being relatively short with respect to any other said compartment and provided With openings in its periphery forming a cylindrical screen, and means to rotate said drum about its cylindrical axis.

3. Log barking apparatus comprising a horizontally disposed cylindrical drum having an inlet end for receiving logs to be debarked and a discharge end, means for supplying fluid to said inlet end, a plurality of transversely disposed heads spaced apart Within said drum from the inlet end to the discharge end to form successive intercommunicating compartments Within the drum, each head being provided with a circular central aperture, such apertures being successively larger in the direction of the discharge end, so that said fluid spills from each of said apertures to the adjacent larger aperture to generate a flow to push said logs being debarked in the direction of said discharge end, the peripheral Walls of all of said 4 compartments being imperforate except at the final compartment at the discharge end, that final compartment being relatively very short with respect to any other said compartment and provided With openings in its periphery forming a cylindrical screen, means to rotate said drum about its cylindrical axis, and abrading staves extending longitudinally parallel to'the drum axis and mounted on the interior of the drum walls.

4. Log barking apparatus comprising a horizontally disposed cylindrical drum having an inlet end for receiving logs to be debarked and a discharge end, means for supplying fluid to said inlet end, a plurality of transversely inlet end to the discharge end to form successive interdisposed heads spaced apart Within said drum from the communicating compartments Within the drum, each head being provided with a circular central aperture, such apertures being. successively larger in the direction of the discharge end, so that said fluid spills from each of said apertures to the adjacent larger aperture to generate a flow to push said logs being debarked in the direction of said discharge end, the peripheral walls of all of said compartments being imperforate except at the final compartment at the discharge end, that final cornpartment. being relatively very short with respect to any other said compartment and provided With slots in its periphery forming a cylindrical screen, abrading staves extending longitudinally parallel tothe drum axis and mounted on the interior of the drum Walls, means to rotate said drum about its cylindrical axis, tires on the exterior of said drum at spaced intervals, a pair of spaced roller bearings for each tire, and tie rods operatively associated with said roller bearings to regulate the sup ported height of the drum.

Birdsall Oct. 28, 1958

Claims

1. LOG BARKING APPARATUS COMPRISING A HORIZONTALLY DISPOSED CYLINDRICAL DRUM HAVING AN INLET END FOR RECEIVING LOGS TO BE DEBARKED, MEANS FOR SUPPLYING FLUID TO SAID INLET END, AND A DISCHARGE END, AND A PLURALITY OF TRANSVERSELY DISPOSED HEADS SPACED APART WITHIN SAID DRUM FROM THE INLET END TO THE DISCHARGE END TO FORM SUCCESSIVE INTERCOMMUNICATING COMPARTMENTS WITHIN THE DRUM, EACH HEAD BEING PROVIDED WITH A CIRCULAR CENTRAL APERTURE, SUCH APERTURES BEING SUCCESSIVELY LARGER IN THE DIRECTION OF THE DISCHARGE END, SO THAT SAID FLUID SPILLS