US3807470A - Drum-type debarking apparatus - Google Patents

Drum-type debarking apparatus Download PDF

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Publication number
US3807470A
US3807470A US00297777A US29777772A US3807470A US 3807470 A US3807470 A US 3807470A US 00297777 A US00297777 A US 00297777A US 29777772 A US29777772 A US 29777772A US 3807470 A US3807470 A US 3807470A
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United States
Prior art keywords
drum
debarking
drum means
anvil
debarking apparatus
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00297777A
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English (en)
Inventor
D Young
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Canadian Ingersoll Rand Co Ltd
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Canadian Ingersoll Rand Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canadian Ingersoll Rand Co Ltd filed Critical Canadian Ingersoll Rand Co Ltd
Priority to US00297777A priority Critical patent/US3807470A/en
Priority to FR7327080A priority patent/FR2193683B1/fr
Priority to GB4442973A priority patent/GB1399793A/en
Priority to NO3736/73A priority patent/NO138199C/no
Priority to DE2348069A priority patent/DE2348069C3/de
Priority to CA182,523A priority patent/CA994646A/en
Priority to AT855573A priority patent/AT337442B/de
Priority to BR7892/73A priority patent/BR7307892D0/pt
Priority to SE7313884A priority patent/SE428350B/sv
Priority to SU731967859A priority patent/SU876053A3/ru
Priority to FI3196/73A priority patent/FI68556C/fi
Priority to FR7336825A priority patent/FR2202763B1/fr
Priority to JP11623273A priority patent/JPS5650684B2/ja
Application granted granted Critical
Publication of US3807470A publication Critical patent/US3807470A/en
Priority to US517463A priority patent/US3923087A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • B27L1/02—Debarking or removing vestiges of branches from trees or logs; Machines therefor by rubbing the trunks against each other; Equipment for wet practice
    • B27L1/025—Debarking in rotating drums

Definitions

  • ABSTRACT Debarking apparatus comprising a rotatably driven drum and an anvil inside of the drum circumferentially surrounded by the latter and operatively associated therewith for restricting log movement with the drum during the drum rotation.
  • the drum carries debarking tool means in the form of a plurality of individual, blunt, debarking tool elements which are shown as arcuately contoured on all working sides, said debarking tool elements being arranged in sets extending at least generally circumferentially of the drum at locations spaced longitudinally thereof; and adjacent ones of such sets of tool elements are eccentric to one another and in circumferentially stepped relationship.
  • SHEET 3 [IF 3 ll DRUM-TYPE DEBARKING APPARATUS
  • Thepresent invention relates generally to debarking apparatus andmore particularly to debarking apparatus of the drum-type wherein logs are debarked in a rotatably. driven drum. 1 r
  • Commercially available, rotating drum-type debarking apparatus includes both traditional tumbling debarkers, usually employed for debarking pulpwood logs of up to eight feet in length, and more recently developed, rolling flow debarkers, usually employed for debarking pulpwood logs of eight feet and greater length.
  • Conventional tumbling debarkers are characterized by the drum carrying staves which are particularly adapted to provide mini'rnum slip between the drum 1 and its contained logs whereby, during drum rotation, the logs are caused to tumble in random manner while bark is removed due to the combined action of impact, compression and attrition primarily between the logs. Tumbling debarkers are unable to debark frozen logs and, whenfrozen wood is encountered, require that the outer layers of the logs be thawed either prior to, or during, the debarking.
  • Conventional rolling flow debarkers are characterized by the drum carryinga larger number of staves of flatter, less aggressive profile adapted to permit slip between the logs and the drum; and, during the operation of such debarkers, the logs are maintained essentially parallel to the drum axis while a primarily rolling or spinning action is imparted to the logs to provide debarking by both log-to-log abrasion and log-to-dru'm abrasion.
  • the drums of rolling flow debarkers have higher throughput rates than those of tumbling debarkers, thereby reducing wood handling costs.
  • conventional rolling flow debarkers provide less effective bark removal than tumbling debarkers particularly with respect to irregular or small diameter logs.
  • rolling flow debarkers are of substantially higher capital costs than tumbling debarkers and are of relatively greater (for example, 150 to 200 foot) length.
  • winter operation of rolling flow debarkers in cold climates again necessitates the thawing of the logs either prior to, or during, the debarking. Losses due to log slashing may be at least somewhat lower in rolling flow debarkers than in tumbling debarkers in some instances; and, although wood losses during the debarking operation may be lower in rolling flow debarkers than tumbling debarkers, it is believed that the amount of such lower wood losses is at least sometimes exaggerated.
  • An object of the present invention is to-provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to provide relatively rapid, highly effective debarking.
  • Another object of theinvention is to provide new and improved rotating drum type debarking apparatus which is particularly constructed and arranged such that the debarking drum, for a given diameter and length, provides substantially greater debarking capacity than the drums of the before-described conventional debarking apparatus.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to permit construction of the debarking drum of substantially smaller diameter and/or length than possible in the beforedescribed conventional debarking apparatus of similar capacity.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularlyconstructedand arranged to readily debark logs, such as irregularly shapped and/or hardwood logs, currently believed to be difficult to debark.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to readily debark frozen logs without the necessity for liquid defreezing of the logs, thereby avoiding the problems inherently arising in the event of such liquid defreezing.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged, to be capable of employment in either relocatable or fixed embodiments.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to reduce wood loss during debarking due to positive orientation of the logs and relatively short retention time in the drum.
  • Another object is to .provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to be rotatably driven at relatively rotary high speed.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particu larly constructed and arranged to debark logs of substantially any desired length.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to provide highly effective debarking while substantially minimizing or eliminating the necessity for log recirculation back through the debarking drum.
  • Another object is to provide new and improved rotating drum-type debarking apparatus which is particularly constructed and arranged to, for the debarking capacity of the drum, require only a relatively economical wood handling system.
  • Another object is to provide new and improved drum-type debarking apparatus which is particularly constructed and arranged to posess only relatively low power requirements.
  • debarking apparatus may comprise drum means, anvil means within the drum means operatively associated therewith for restricting log movement with said drum meansduring the rotation of said drum means, the drum means being rotatable relative to the anvil means for applying high unit pressure, localized impact blows to logs in said drum means during the rotation thereof, and debarking tool means carried by the drum means within the drum means, such debarking tool means being arcuately contoured on all working sides and being illustrated as particularly arranged to debark irregularly shapped logs.
  • FIG. 1 is an elevational side view of a debarking apparatus constructed in accordance with one embodiment of the invention
  • FIG. 2 is a elevational end view showing the inlet end of the debarking apparatus illustrated in FIG. 1;
  • FIG. 3 is an enlarged elevational sectional view of such debarking apparatus taken on line 3-3 of FIG. 1, looking in the direction of the arrows;
  • FIG. 4 is an enlarged, fragmentary, longitudinal sectional view of the debarking apparatus illustrated in FIGS. 1 through 3;
  • FIG. 5 is an enlarged, fragmentary sectional view of said apparatus taken on line 5-5 of FIG. 3, looking in the direction of the arrows;
  • FIG. 6 is a schematic view illustrating the relative arrangement of four adjacent ones of the sets of tool elements carried by the drum of such apparatus;
  • FIG. 7 is a perspective view illustrating the relative arrangement of the avnil means and debarking tool mounting means of the FIG. 1 apparatus;
  • FIG. 8 is a view schematically illustrating the relative arrangement of the anvil means and debarking tool mounting means of the FIG. I apparatus.
  • FIG. 9 is a fragmentary view illustrating an alternative form of anvil means for use in the debarking appa- -ratus shown in FIG. 1.
  • FIG. 1 illustrates a debarking apparatus comprising an elongated, rotatable, debarking drum 10 which is at least generally horizontal although, if desired, angled downwardly from its inlet end towards its discharge end 12b to facilitate the passage of logs longitudinally therethrough.
  • the drum 10 includes an inlet section 14, located adjacent the drum inlet end 12a, and a debarking section 16 which is unitary with the inlet section 14.
  • the drum inlet section 14 is formed from an imperforate rolled plate and intended only for introducing logs into the drum 10.
  • the drum debarking section 16 is illustrated as formed from a plurality of coaxial ring supports 18 spaced apart longitudinally of the drum 10 by therebetween bark discharge openings 20, and longitudinally extending channels 22 circumferentially spaced around the ring supports 18 and interconnecting the latter.
  • the debarking section alternatively could be formed from annular plate or of other construction, providing that suitable bark discharge openings are therein provided.
  • the drum inlet section 14 could, if desired, be provided with helical or other suitable means for facilitating the flow of logs therethrough.
  • the drum 10 includes a pair of annular tires 24, rigidly mounted circumferentially around the channels 22 at locations spaced apart longitudinally of the drum 10, and is ground supported by pairs of rotatable trunnion rollers 26 rotatably engaging each of the tires 24.
  • the drum 10 rigidly carries a circumferential toothed gear 28 intermeshing with a driving pinion 28a and is rotatably driven therethrough by a conventional driving motor 30 which is connected to the pinion 28a through a conventional speed reducer 30a.
  • the motor 30 is suitably sized to rotatably drive the drum l0 loaded with logs at a relatively high rotary speed within the range of, for example, twenty to one-hundred revolutions per minute.
  • the debarking apparatus further comprises stationary or non-rotatable log supply and discharge sections 32,34, respectively, adjacent the inlet and discharge ends l2a,l2b of the drum 10.
  • the stationary log supply section 32 is ground mounted by a supporting pedestal 36 and contains a supply chamber 38 at one open end to the interior of the drum inlet section 14 for supplying unbarked logs thereto.
  • the other end of the inlet chamber 38 is of reduced cross-section and communicates through a relatively small diameter inlet opening 40 with a conveyor 42 or other source of logs 44 to be debarked; and the supply chamber 38 progressively increases in cross-section to the full cross-section of the interior of the drum inlet section 14 as it extends from the inlet opening 40 towards the inlet section 14.
  • the stationary discharge section 34 is ground mounted by a supporting pedestal 46 and contains a discharge chamber 48 at one end open to the interior of the drum discharge end 12a for discharging debarked logs therefrom. Adjacent its other end, the discharge chamber 48 includes a portion progressively narrowing in crosssection; and at its said other end the discharge chamber 48 terminates in a relatively small discharge opening 50 communicating with a discharge chute 52 adapted for discharging debarked logs 54 therefrom.
  • the supply and discharge sections 32, 34 may be carried by the drum for rotation therewith rather than being stationary and separate from the drum l0.
  • the drum debarking section 16 isprovided with relatively blunt debarking tools or tool elements 56 particularly constructed for applying high intensity, hammerlike impacts to logs passingthrough the debarking section. 16 during the relatively high speed driven rotation of the drum 10.
  • the tool elements 56 serve to debark the logs and also cause log rotation and a transverse pattern of circulation of the logs resulting in repeated presentation of varying parts of the logs to the tools 56.
  • the debarking tools 56 are in the configuration of generally hemispherical protrusions, arcuately contoured on all working sides to minimize wood damage, which are sufficientlysmall to provide high unit pressure, localized impact blows to the logs during the debarking operation.
  • the arcuately contoured working surface 56a of each tool element 56 could be of three-eights to one-half inch radius for a 34 inch diameter experimental drum and one to one and one-quarter inch radius for a 6 foot diameter drum, that is of a radius of around approximately onefiftieth to one-hundredth of the drum diameter.
  • the debarking tools 56 could be of other than generally hemispherical configuration providing that'their dimensions longitudinally of the drum 10 are maintained only a relatively small or minor portion. of the length of the logs to be debarked whereby they are enabled to provide said high unit pressure, impact blows to the logs.
  • the de' barking tools 56 could be of different sizes at different locations in the drum 10.
  • the tools 56 adjacent the inlet section 14 ofthe drum 10 could be of smaller size than the others thereof with the size of the tools 56 progressively increasing from the drum inlet section 14 towards the drum discharge'end 12b.
  • the debarking tools 56 are particularly arranged to provide random impacts to logsv passing through the drum 12 as well as to debark hollow or recessed portions of the logs. More specifically, as illustrated, an annular eccentric mounting plate 58 of continuously varying radial cross-section is affixed along its outer circumference to the inner circumference of each ring support 18. Moreover, adjacent ones of the mounting plates 58 longitudinally of the drum 10 are circumferentially offset whereby the most radially enlarged portions 58a of such adjacent plates 58 extend arcuately along successive arcuate segments of the drum circumference and longitudinally overlap for minor portions of their lengths.
  • each mounting plate 58 has affixed thereto an annular tool mounting ring 60, spaced by a space 62 from each of the thereadjacent ones thereof; and each tool mounting ring 60, in turn, carries an arcuate tool mounting segment 64, shown for the purposes of illustration as being of around one hundred degrees in arcuate length, which is located to extend along the most radially enlarged portion 58a of the'corresponding mounting plate 518.
  • Each tool segment 64 along its inner circumference carries a set of debarking tools 56, each such set of the tools 56, as illustrated, comprising a plurality of generally circumferentially arranged rows of the tools 56 and justaposed rows of the tools 56 of each set thereof "ral pattern.
  • the illustrated arrangement of the tool mounting segments 64 causes adjacent ones thereof to extend arcuately along successive arcuate segments of the drum inner circumference and longitudinally overlap for a minor portion of their arcuate lengths.
  • adjacent onesof the sets of tools 56 are resultantly caused to similarly extend around successive arcuate segments of the drum inner circumference and overlap circumferentially of the drum 10, whereby the sets of the tools 56 are in circumferentially stepped relationship.
  • the tools 56 are eccentric to the drum 12; and sets of the tools 56 at different locations longitudinally of the drum 10 are eccentric to one'another.
  • the tools 56 are unusually effective in debarking hollow or recessed portions of logs and provide random impacts to the logs during the drum rotation.
  • the debarking apparatus further includes anvil means within the drum 10 circumferentially surrounded by the latter and preventing rimming of logs with the drum 10 during the relatively high speed drum driven rotation (that is, restricting log movement with the drum 10 during its rotation by preventing logs from being carried completely around the inner circumfer ence of the drum 10) while further, controlling the velocity of the transverse circulation of the logs, thereby maximizing the relative velocity of the tools 56 and the log mass and also maximizing the forces between the tools 56 and the log mass.
  • this anvil means comprises an elongated anvil, designated generally as 66, which longitudinally extends through the interior of the drum l0 and is rigidly connected at opposite ends to the supply and discharge sections 32,34, respectfully.
  • the opposite ends of the anvil 66 could be mounted to stationary mounting frames on the opposite sides of the sections 32,34.
  • the anvil is normally held in fixed position during operation of the apparatus.
  • the anvil 66 could be pivotally mounted either for adjustment or free swinging movement during the operation of the apparatus, the drum 10 again, of course, being rotatable relative to the anvil 66.
  • the anvil 66 projects through the upper half of the interior of the drum 10 and is in the portion of such upper half leading in the direction of the drum driven rotation. It will be understood, however, that the anvil 66 could be otherwise suitably located internally of the drum 10, but preferably is in the upper half of the drum 10 to permit maximum drum loading and maximize the unit pressure with which the debarking tools 56 impact the logs.
  • the anvil 66 Throughout the portion of the anvil 66 internally of the debarking section 16, the anvil 66 includes an outwardly facing, upper, generally convex, surface 68 opposing the inner circumference of the drum 10.
  • the anvil 68 is spaced from the drum carried rotating components of the apparatus by an arcuate space 70 sufficient to permit rotation of such components relative to the anvil 66; and the space 70 preferably progressively increases in the direction of the drum driven rotation to permit log fragments of small diameter to readily escape therefrom.
  • the anvil 66 at intervals throughout the portion of its length internally of the debarking section 16, the anvil 66 comprises integral depending comb-like portions 72 projecting generally radially outwardly intermediate each of the adjacent ones of the mounting plates 58. The comb-like portions 72, as will be understood, prevent small diameter logs from entering the space 70.
  • the lower side of the anvil 66 includes an at least generally downwardly facing portion 74 which is particularly constructed for controlling the transverse circulation of the logs in the debarking section 16, to cause logs emerging from the top of the therebelow log pile to roll downwardly along the free surface, designated generally as 76 in FIG. 3, of the log pile.
  • the portion 74 thus prevents the logs emerging from the top of the log pile from being thrown outwardly above the free surface 76, and causes the weight of the emerged logs to act through the log pile to increase the debarking forces between the tools 56 and the there-adjacent logs.
  • the portion 74 controls the velocity at which logs emerge from the top of the log pile in the transverse circulation of the logs and thereby controls both the velocity of the logs adjacent the tools 56 and the relative velocity of the tools 56 and logs.
  • the lower side of the anvil 66 includes an at least generally downwardly facing portion 78, at least partially defined by the comb-like portions 72, which insures smooth flow of successive logs of varying diameters in the transverse circulatory pattern of the log movement. More particularly, the portion 78 serves to prevent the entrapment of smaller diameter logs at the location indicated generally as 80 in FIGS. 3 and 8, which entrapment might otherwise occur in the event that a small diameter log at said location were followed by a succession of larger diameter logs in the circulatory pattern. The portion 78 performs this function due to its location above the center of the drum 10, its length transversely of the drum and its angle relative to the surface 74.
  • the angle of the surface 78 relative to the surface 74 may be around and preferably is between l2 and 25.
  • the remaining portion 86 of the lower side of the anvil 66 preferably slopes upwardly from the portion 74 and may be of substantially any desired configuration not interfering with the transverse log circulation and providing the anvil 66 with appropriate strength and stiffness.
  • the lower side of the anvil 66 may be provided with ribs 88 or other means adapted for facilitating log movement longitudinally through the debarking section 16, the ribs 88, as illustrated, being located at intervals along such anvil lower side.
  • the drum l0 and its carried debarking tools 56 are rotatably driven relative to the anvil 66 at a relatively high rotary speed (for example 20 to 100 revolutions per minute) by the motor 30.
  • the logs 44 to be debarked may be either continuously or intermittently supplied by the conveyor 42 through the supply chamber 38 in the supply section 32 to the inlet section 14 of the rotating drum 10 and the debarked logs 54 are discharged from the discharge end 16 of the drum 10 to the discharge chute 52 through the discharge chamber 48 in the discharge section 34.
  • the tools 56 debark the logs by applying high intensity, hammer-like impacts thereto and also cause rotation and the beforedescribed transverse circulation of the logs.
  • the tools 56 due to their arrangement, moreover, readily debark irregularly shaped logs while, as the logs are maintained at least substantially parallel to the drum axis, wood losses due to brooming are substantially minimized.
  • the anvil 66 controls the transverse circulatory velocity of the logs and the transverse pattern of log flow, thereby maximizing the debarking effect by maintaining maximum relative velocity between the tools 56 and the logs and maximizing the forces between the tools 56 and the adjacent logs.
  • the anvil 56 moreover, prevents logs from entering the space and insures uniform flow free from interference by the formation of log structures at 80.
  • the bark removed from the logs in the debarking section 16 is rapidly discharged therefrom by the bark discharge openings 20, thereby preventing the bark from interfering with the bark removal processes; and the entire debarking process, including the debarking of frozen logs, can be performed without the necessity for thawing.
  • Debarking apparatus comprising drum means, anvil means inside of said drum means operatively associated therewith for restricting log movement with said drum means during the rotation of said drum means, said drum means being rotatable relative to said anvil means, and debarking tool means carried by said drum means Within said drum means for applying high unit pressure, localized impact blows to logs in said drum means during the rotation thereof, said debarking tool means being accurately contoured on all working sides.
  • said anvil means is adapted to create transverse log circulation in said drum means and to cause logs to roll downwardly across the free surface of a therebelow log pile.
  • debarking apparatus according to claim 1, wherein said debarking tool means comprises tool element means eccentric to said drummeans.
  • debarking tool means comprises tool element means arranged at least generally circumferentially of said drum means at locations spaced longitudinally thereof.
  • said debarking tool means comprises a plurality of individual tool elements at locations spaced longitudinally and circumferentially of said drum means.
  • Debarking apparatus further comprising mounting means extending at least generally circumferentially of said drum means at locations spaced longitudinally thereof mounting said tool elements on said drum means, said anvil means including portions projecting intermediate adjacent ones of said mounting means.
  • debarking tool means comprises a plurality of sets of tool elements extending at least generally circumferentially of said drum means at locations spaced longitudinally thereof.
  • Debarking apparatus according to claim 12, further comprising arcuate mounting means mounting said tool elements on said drum means, said anvil means including portions projecting between adjacent ones of said mounting means.
  • drum means is at least generally horizontal and said anvil means is in the upper half of said drum means.
  • said anvil means includes an at least generally downwardly facing anvil surface.
  • said anvil means includes first and second at least generally downwardly facing anvilsurfaces, said first anvil surface being adapted to control the relative velocity of said debarking tool means and logs in said drum means duringrotation of said drum means, said first anvil surface also being adapted to create transverse log circulation in said drum means and to cause logs to roll downwardly across the free surfaceof a therebelow log pile, and said second anvil surface being adapted to prevent build-up of log structures adjacent to said drum means.
  • Debarking apparatus further comprising mounting means extending at least generally circumferentially of said drum means at locations spaced longitudinally thereof mounting said debarking tool means on said drum means, said anvil means including portions intermediate adjacent ones of said mounting means, and said second anvil surface being on said projecting portions of said anvil means.
  • Debarking apparatus according to claim 1, further comprising means associated with said anvil means for facilitating log movementlongitudinally through said drum means.
  • said log movement facilitating means comprises rib means carried by said anvil means.
  • Debarking apparatus according to claim 1, further comprising means adjacent one end of said drum means providing a supply chamber communicating with such end of said drum means for supplying logs thereto, said supply'chamber including at least a portion progressively increasing in cross-section as it extends towards said drum means end.
  • Debarking apparatus according to claim 1, further comprising means adjacent one end of said drum means providing a discharge chamber communicating witth such end of said drum means for discharging logs therefrom, said discharge chamber including at least a portion progressively decreasing in cross-section as it extends from said drum means end.
  • Debarking apparatus further comprising means adjacent one end of said drum means providing a supply chamber communicating with such one end of said drum means for supplying logs thereto, said inlet chamber including at least a portion progressively increasing in cross-section as it extends towards said one end of said drum means, and means adjacent the other end of said drum means providing a discharge chamber communicating with such other end of said drum means for discharging logs therefrom, said discharge chamber including at least a portion progressively decreasing in cross-section as it extends'from said other end of said drum means.
  • said debarking tool means comprises a plurality of sets of tool elements extending at least generally circumferentially of said drum means at locations spaced longitudinally thereof, said sets of tool elements each extend around only a portion of said drum means, said sets of tool elements include sets thereof eccentric to one another and sets thereof eccentric to said drum means, said drum means is at least generally horizontal, and said anvil means extends through the length of said drum means and includes an at least generally downwardly facing anvil surface throughout the length of said drum means.
  • Debarking apparatus comprising drum means and debarking tool means carried by said drum means within said drum means, said debarking tool means comprising a plurality of sets of tool elements extending at least generally circumferentially of said drum means at locations spaced longitudinally of said drum means, and said sets of tool elements each extending around only a portion of the circumference of said drum means.
  • Debarking apparatus comprising drum means, a plurality of debarking tool elements carried by said drum means Within said drum means for applying high unit pressure, localized impact blows to logs in said drum means during rotation thereof, said debarking tool elements being accurately contoured on all working sides, and anvil means inside of said drum means for controlling the relative velocity of said debarking tool elements and logs in said drum means during rotation of said drum means, said drum means being rotatable relative to said anvil means.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Paper (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Tyre Moulding (AREA)
US00297777A 1972-07-24 1972-10-16 Drum-type debarking apparatus Expired - Lifetime US3807470A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US00297777A US3807470A (en) 1972-10-16 1972-10-16 Drum-type debarking apparatus
FR7327080A FR2193683B1 (sv) 1972-07-24 1973-07-24
GB4442973A GB1399793A (en) 1972-10-16 1973-09-21 Drum-type debarking apparatus
NO3736/73A NO138199C (no) 1972-10-16 1973-09-24 Barkemaskin av trommeltypen.
DE2348069A DE2348069C3 (de) 1972-10-16 1973-09-25 Drehbare Trommel zum Entrinden von Langholz
CA182,523A CA994646A (en) 1972-10-16 1973-10-03 Drum-type debarking apparatus
AT855573A AT337442B (de) 1972-10-16 1973-10-08 Vorrichtung zum schalen von baumstammen
BR7892/73A BR7307892D0 (pt) 1972-10-16 1973-10-10 Aparelho descascador
SE7313884A SE428350B (sv) 1972-10-16 1973-10-12 Avbarkningsmaskin av trumtyp
SU731967859A SU876053A3 (ru) 1972-10-16 1973-10-15 Устройство дл окорки бревен
FI3196/73A FI68556C (fi) 1972-10-16 1973-10-16 Trumbarkningsmaskin
FR7336825A FR2202763B1 (sv) 1972-10-16 1973-10-16
JP11623273A JPS5650684B2 (sv) 1972-10-16 1973-10-16
US517463A US3923087A (en) 1972-07-24 1974-10-24 Drum-type debarking apparatus including log deflector means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00297777A US3807470A (en) 1972-10-16 1972-10-16 Drum-type debarking apparatus

Publications (1)

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US3807470A true US3807470A (en) 1974-04-30

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Application Number Title Priority Date Filing Date
US00297777A Expired - Lifetime US3807470A (en) 1972-07-24 1972-10-16 Drum-type debarking apparatus

Country Status (11)

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US (1) US3807470A (sv)
JP (1) JPS5650684B2 (sv)
AT (1) AT337442B (sv)
BR (1) BR7307892D0 (sv)
CA (1) CA994646A (sv)
DE (1) DE2348069C3 (sv)
FI (1) FI68556C (sv)
GB (1) GB1399793A (sv)
NO (1) NO138199C (sv)
SE (1) SE428350B (sv)
SU (1) SU876053A3 (sv)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923087A (en) * 1972-07-24 1975-12-02 Ingersoll Rand Canada Drum-type debarking apparatus including log deflector means
US4559986A (en) * 1983-07-11 1985-12-24 Kmw Aktiebolag Barking drum with at least one bearing ring
US5337811A (en) * 1992-08-06 1994-08-16 Fulghum Industries, Inc. Debarker infeed conveyor
US5433577A (en) * 1994-05-11 1995-07-18 Magnificent Machinery, Inc. Refuse bag opener
US5538056A (en) * 1994-12-16 1996-07-23 Beloit Technologies, Inc. Log conditioning before mechanical debarking
US5639202A (en) * 1993-01-21 1997-06-17 Magnificent Machinery, Inc. Refuse bag opener
US5669428A (en) * 1994-09-09 1997-09-23 Fulghum Industries, Inc. Conveyor system for log debarking and chipping
US5839490A (en) * 1998-03-17 1998-11-24 Svedala Industries, Inc. Rubber lining for corrugated debarking drum
WO2001049469A1 (en) * 1999-12-31 2001-07-12 Andritz Ag Apparatus for debarking logs or for preparing logs for debarking
CN104908131A (zh) * 2015-06-25 2015-09-16 吉首大学 直筒直桨式带岔枝桑枝去皮装置

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
AT352380B (de) * 1977-11-23 1979-09-10 Andritz Ag Maschf Entrindungstrommel fuer waehlbare entrindung im trocken- oder nassverfahren
JPS56154096A (en) * 1980-04-30 1981-11-28 Niyuuman Kk Knock type note
JPH0439028Y2 (sv) * 1986-11-14 1992-09-11
FI80227C (sv) * 1986-11-26 1990-05-10 Kone Oy Anordning för matande av träd i en barkningstrumma
AT397060B (de) * 1988-09-01 1994-01-25 Andritz Ag Maschf Hohlzylindrische, vollwandige entrindungstrommel
US5896901A (en) * 1998-03-12 1999-04-27 Les Installations Soudins (1990) Inc. Debarking drum
RU169680U1 (ru) * 2016-04-28 2017-03-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" Секция корообдирочного барабана
KR20210065931A (ko) 2018-09-26 2021-06-04 니찌방 가부시기가이샤 함수계 첩부제
CN115315262A (zh) 2020-03-27 2022-11-08 日绊株式会社 贴剂

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US889292A (en) * 1908-06-02 Carl Bache-Wueg Bark-removing machine.
US1228374A (en) * 1916-02-12 1917-05-29 John J Ross Barking-drum.
US2943656A (en) * 1956-08-24 1960-07-05 Coosa River News Print Company Pulpwood-debarking drum having angularly slotted wall and stationary shearing bars
US3080898A (en) * 1960-04-22 1963-03-12 Combustion Eng Tunnel barker
US3136345A (en) * 1961-05-11 1964-06-09 Ibis Entpr Ltd Barking drum

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US889292A (en) * 1908-06-02 Carl Bache-Wueg Bark-removing machine.
US1228374A (en) * 1916-02-12 1917-05-29 John J Ross Barking-drum.
US2943656A (en) * 1956-08-24 1960-07-05 Coosa River News Print Company Pulpwood-debarking drum having angularly slotted wall and stationary shearing bars
US3080898A (en) * 1960-04-22 1963-03-12 Combustion Eng Tunnel barker
US3136345A (en) * 1961-05-11 1964-06-09 Ibis Entpr Ltd Barking drum

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923087A (en) * 1972-07-24 1975-12-02 Ingersoll Rand Canada Drum-type debarking apparatus including log deflector means
US4559986A (en) * 1983-07-11 1985-12-24 Kmw Aktiebolag Barking drum with at least one bearing ring
US5337811A (en) * 1992-08-06 1994-08-16 Fulghum Industries, Inc. Debarker infeed conveyor
US5639202A (en) * 1993-01-21 1997-06-17 Magnificent Machinery, Inc. Refuse bag opener
US5433577A (en) * 1994-05-11 1995-07-18 Magnificent Machinery, Inc. Refuse bag opener
US5669428A (en) * 1994-09-09 1997-09-23 Fulghum Industries, Inc. Conveyor system for log debarking and chipping
US5538056A (en) * 1994-12-16 1996-07-23 Beloit Technologies, Inc. Log conditioning before mechanical debarking
US5839490A (en) * 1998-03-17 1998-11-24 Svedala Industries, Inc. Rubber lining for corrugated debarking drum
WO2001049469A1 (en) * 1999-12-31 2001-07-12 Andritz Ag Apparatus for debarking logs or for preparing logs for debarking
AU773925B2 (en) * 1999-12-31 2004-06-10 Andritz Ag Apparatus for debarking logs or for preparing logs for debarking
ES2233156A1 (es) * 1999-12-31 2005-06-01 Andritz Ag Aparato para el descortezado de troncos o para preparar troncos para su descortezado.
CN104908131A (zh) * 2015-06-25 2015-09-16 吉首大学 直筒直桨式带岔枝桑枝去皮装置

Also Published As

Publication number Publication date
CA994646A (en) 1976-08-10
JPS4969443A (sv) 1974-07-05
DE2348069B2 (de) 1981-06-04
NO138199B (no) 1978-04-17
SE428350B (sv) 1983-06-27
AT337442B (de) 1977-06-27
FI68556C (fi) 1985-10-10
BR7307892D0 (pt) 1974-06-27
FI68556B (fi) 1985-06-28
ATA855573A (de) 1976-10-15
NO138199C (no) 1978-08-02
DE2348069C3 (de) 1982-02-18
SU876053A3 (ru) 1981-10-23
GB1399793A (en) 1975-07-02
DE2348069A1 (de) 1974-04-18
JPS5650684B2 (sv) 1981-12-01

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