Abstract: The invention relates to a feeding apparatus for a harvester, which includes opposing arms, with operating devices, pivoted to a frame, for creating transverse compression, two opposing feed rollers installed in the arms as the only feed rollers for feeding a tree through the throat, and hydraulic motors driving the feed rollers, and at least two pressure-medium lines operating them.

Abstract: A timber-working device having a first pivoting drive arm and a second pivoting drive arm, and a timing link for connecting them. The timing link includes an elongate member having a first end and a second end. A first aperture is at the first end and a second aperture at the second end. At least one of the first aperture and the second aperture is elongate along the length of the member.

Abstract: An apparatus for guiding a plank along a transfer path and towards a cutting assembly. The apparatus includes an auto-centering lateral displacement mechanism maintaining support plates and corresponding guide and drive elements equidistant relative to the transfer path and includes: at least one pair of fixed length vertically extending driving shafts connected to each one of the support plates, the driving shafts each having a lower end connected to the corresponding support plate and being angularly movable relative to a vertical axis according to the lateral position of the corresponding support plate; at least one bushing assembly mounted to the upper section of the frame and receiving therein the upper end of a corresponding one of the driving shafts; and a fixed length connecting shaft extending between the driving shafts of the at least one pair of driving shafts, at the upper end thereof.

Abstract: A gear pair for a lifting vessel includes two gear units driving in opposite directions of rotation and configured for engagement in two tooth racks on a jack-up leg, respectively. Each gear unit includes a drive shaft for connection to a drive, an output shaft for connection to a drive pinion, a transmission housing, a planetary stage mounted in the transmission housing, and a torque support configured to enable support of the gear unit on the other gear unit. The torque support surrounds the transmission housing of the other gear unit in a pincer-like manner and contacts the transmission housing symmetrically with respect to a straight line connecting the output shafts of the gear units at two support points which in relation to a vertical plane extending through the output shaft of the other gear unit are located offset towards the gear unit having the torque support.

Abstract: The present disclosure provides a positioning foot, a positioning device and a method for correcting position of a glass substrate, and belongs to the technical field of automatic positioning. The positioning foot of the present disclosure comprises: a contact member for contacting a side of the glass substrate; an elastic member, a first end of which is connected with the contact member and receives a counterforce from the glass substrate delivered by the contact member so as to compress the elastic member, and a second end of which is fixed; and a sensor fixed on the second end of the elastic member. Wherein, the contact member is arranged to be displaced with a compression action of the elastic member, and after the contact member is displaced to a predetermined position, the sensor is triggered to be in an “ON” state such that the elastic member stops the compression action.

Abstract: An apparatus for processing the surface of a workpiece includes: a first rotating body connected to a first rotating shaft and including a first protruding portion connected to a part of the outer circumference thereof; a second rotating body connected to a second rotating shaft and including a second protruding portion connected to a part of the outer circumference thereof; and a third rotating body connected to a third rotating shaft and including a third protruding portion connected to a part of the outer circumference thereof, wherein the first to third rotating shafts are in the same plane, a first angle between the first and second rotating shafts, a second angle between the first and third rotating shafts, and a third angle between the second and third rotating shafts are identical, outer circumferences of the first to third rotating shafts adjacent to one another form a pathway through which a workpiece can pass, and the size of the pathway is adjusted by moving the first rotating body.

Abstract: A stock feeder for woodworking equipment includes a base, a cross clamp, a horizontal bar unit, a vertical bar unit, a feeding unit, and an electrical unit. The electrical unit has an electrical unit main body and a variable-frequency drive. The electrical unit main body has a first housing, a plurality of heat dissipation grooves provided on the outer periphery of the first housing, and a power fan which is independently mounted on a top portion of the first housing and in communication with the heat dissipation grooves. The variable-frequency drive has a second housing, a variable-frequency circuit sealed in the second housing, and a control panel exposed outside the second housing. The second housing has an outer surface provided with a plurality of heat dissipation slots corresponding in position to and in communication with the heat dissipation grooves of the electrical unit main body.

Abstract: A wood chipper includes a motor, a drive shaft, a feed roller, a feed chute, a chipping device 103, a discharge chute, and at least two adjustable legs. The feed roller has a centered horizontal position which is halfway between its minimum and maximum positions. When the feed roller is at its centered horizontal position, the motor, the drive shaft, and the feed roller are all level with one another. When the feed roller is below its centered position, the drive shaft is angled down from the motor to the feed roller. When the feed roller is above its centered position, the drive shaft is angled up from the motor to the feed roller. A plurality of guides maintain the feed roller in a level position. The legs are adjustable independent of one other to different heights. The legs angle outward at their bottom portions, where they are attached to skids.

Abstract: A mechanical control mechanism for the feed of a brush chipper is disclosed. The feed control bar has four positions: (1) forward or feed, (2) neutral, (3) reverse, and (4) stop. The hydraulic control valve has the three usual positions: (1) forward or feed, (2) neutral, (3) reverse. A function of the feed control bar is to provide the three function of the hydraulic control valve, plus the fourth in a fashion amenable to emergency situations. To these ends, the control bar has an extreme rearward position wherein the feed mechanism is stopped. The only permissible change to the stopped condition of the feed mechanism is to reverse the feed. Until a reset lever is manipulated, the hydraulic control valve cannot be put into a forward feed position.

Abstract: A component mill for producing wooden construction components has a pair of input rollers spaced from a pair of output rollers, wherein each comprises a pair of vertically-stacked pinch rollers. The mill has an overhead X- and Y-axis track system for scrolling a high speed router bit dangling underneath a high speed motor in X- and Y-directions as the input and/or output rollers pass a board for trimming by the spinning, and perhaps scrolling and not stationed still, router bit. A control system controls the input and output rollers, and X- and Y-axis track system in concert to form a selected design of a wooden construction component output from an inputted board.

Abstract: A feed wheel (10) for tree trunks, with rows of drive teeth (30) protruding from extended supports (20) united with a peripheral surface (18) of the wheel. In order to make the spaces between the supports (20) more self-clearing, supports (20) that are neighbours extend mutually divergently throughout the complete sideways direction of the peripheral surface (18) (at an angle ?).

Abstract: A log feed roll for displacing a log has a roll which may be rotated around a rotary axis, flutes for propelling the log, and removable flute attachments fastened to the flutes for contacting the log during engagement of the log in the feed roll. The flutes have flute apertures extending through side walls thereof. The attachments have a top attachment section from which generally opposed side braces extend. The attachments are fastened to the flutes by bolts extending through the brace apertures on one side brace, the flute apertures and the brace apertures on the opposing side brace, and nuts engaged on the bolts on the opposing side brace. The side walls are situated between the side braces, in abutment therewith when the attachment is fastened to the flute.

Abstract: A wood planing machine includes a base adapted to permit a workpiece to be moved thereon in a front-to-rear direction, a plurality guide posts fixed on the base, a mounting seat sleeved movably on the guide posts, a motor disposed on the mounting seat, and a cutting unit disposed on the mounting seat. The cutting unit includes a rough-plane cutter, a fine-plane cutter disposed behind the rough-plane cutter, a first transmission unit interconnecting the motor and the rough-plane cutter to allow the rough-plane cutter to be driven by the motor, and a second transmission unit interconnecting the rough-plane cutter and the fine-plane cutter to allow rotation of the rough-plane cutter to be transferred to the fine-plane cutter.

Abstract: A log feed roll for displacing a log has a roll which may be rotated around a rotary axis, flutes for propelling the log, and removable flute attachments fastened to the flutes for contacting the log during engagement of the log in the feed roll. The flutes have flute apertures extending through side walls thereof. The attachments have a top attachment section from which generally opposed side braces extend. The attachments are fastened to the flutes by bolts extending through the brace apertures on one side brace, the flute apertures and the brace apertures on the opposing side brace, and nuts engaged on the bolts on the opposing side brace. The side walls are situated between the side braces, in abutment therewith when the attachment is fastened to the flute.

Abstract: A method and apparatus are provided for processing rough cut lumber to convert the rough cut lumber into trimmed to length and dimensionally trimmed to form a standard piece of dimensioned lumber. The process and apparatus includes the formation of a plurality of columns of lumber pieces in addition to a one column operation mode. The lumber pieces in each of the columns are graded, indexed, measured for a trim to length, trimmed to length and then sorted by grade and trimmed length.

Abstract: A sawing or reducing assembly which includes at least one saw or reducing head such as a chipping head, at least one drive driving the saw or reducing head, and at least one drive line cooperating between the drive and the saw or reducing head, so as to rotatably drive the saw or reducing head. The saws or reducing heads, or at least some of them, are at least selectively transversely actuable so as to selectively translate transversely into a workpiece feed path as a workpiece is translated along the feed path into engagement with the workpiece. The drive is fixed in relation to the feed path. The drive line includes a corresponding slip joint allowing for relative movement between the drive and the saw or reducing head as the saw or reducing head is selectively translated transversely into the feed path.

Abstract: A heavy flywheel disc having a radially spaced apart array of pockets in which are mounted knives. Short logs, which have been de-barked, are fed in with their long axis parallel to the face of the flywheel. A hydraulic ram translates the logs sideways into the plane containing the rotating knives. The use of the hydraulic ram provides for a variable infeed speed to obtain the particular thickness of shavings which provides in the end commercially desirable shavings for use, for example, in horse stables. The knives have notched cutting edges. The notches limit the width of each shaving to create strands which are for example ¾ inches wide. The strands are then chopped in an automated chopping device such as a forage harvester to produce shavings.

Abstract: The invention relates to a feeder device in a timber harvester, which includes a frame, a 3-row roller chain arranged to be rotated around a drive sprocket, a turnover member and roll guides, which roll guides extend for a great length of a gripping side of the feeder device, between the drive sprocket and the turnover member, and in which roller chain there are rows of links staggered relative to each other by transverse pins, comprising a middle row of links with smaller rollers and outer rows of links with larger rollers, each row of links corresponding to its own roll guide.

Abstract: The invention relates to a process and an apparatus for producing veneer strips, chipped wood or the like, individual pieces of wood being joined together, with grains parallel, to form a group and then a multiplicity of such groups being arranged one behind the other, with grains parallel, to form a closely packed line, whereupon this line is then fed in its longitudinal direction, transverse to the wood-grain direction, to a chipping tool. In order, during the chipping operation, largely to prevent the accumulation of coarse chips, it is proposed according to the invention that the leading group conveyed up against the chipping tool is subjected, via the following group butting against it, to a longitudinal compressive force which acts in the longitudinal direction of the line, which exceeds the relative cutting force to which the leading group is subjected by the chipping tool, and which is largely absorbed by the leading group, which, by way of its advancement speed being braked, acts as an abutment.

Abstract: A split sawbox for a gangsaw includes a sawbox having at least first and second mating sawbox sections. The sections are linearly selectively translatable relative to one another between a closed position wherein the sections are releasably locked together for operation of the gangsaw, and an open position wherein the sections are linearly separated from one another to open a gap within which a workman may stand for maintenance of the gangsaw.

Abstract: One embodiment of the present invention is a compact, low-cost, lightweight, versatile and easy-to-operate, processor-controlled carving and multi-purpose shaping device (“PCCMPS machine”). The PCCMPS machine that represents one embodiment of the present invention is configured, in part, similarly to common, commercially available portable wood planers and ubiquitous laser and ink-jet computer printers, with work pieces fed into the PCCMPS machine in a horizontal direction. The PCCMPS machine includes a motor-powered cutting head that can power detachable bits to drill, cut, shape, and rout a work piece under processor and computer control. The cutting head may be translated, under processor control, back and forth across the surface of the work piece in a direction perpendicular to the direction in which the work piece is fed into the PCCMPS machine and moved by motor-powered rollers.

Abstract: The log positioning and conveying apparatus is used for conveying a log from an upstream end to a downstream end, and for positioning a log according to a predetermined downstream position. The apparatus comprises an open frame and a number of powered conveying rollers arranged therein in a row. These rollers, in addition to being rotatable, are displaceable in two directions relative to the open frame, namely, in a vertical direction for correcting the position of the log vertically relative to the open frame, and in a horizontal direction transversal to the longitudinal axis of the conveying apparatus, for correcting the position of the log transversely relative to the longitudinal axis.

Abstract: A feed roll for tree handling has a number of strips which substantially cover its outer face. The strips have leading and trailing edges shaped to interdigitate with one another. A layer of resilient or slippery material is located between the strips and a drum. The strips can rock slightly.

Abstract: A feeding roller includes a hub member mounted to rotate with a driven shaft, a plurality of angularly displaced anchored seat members disposed on a surrounding outer wall of the hub member and defining anchored areas, a surrounding workpiece contacting member surrounding and spaced apart from the hub member so as to be brought into frictional contact with a workpiece, a plurality of force transmitting members disposed on an inner annular wall surface of the surrounding workpiece contacting member and forming secured areas which spacedly confront and lead the anchored areas, respectively, and a plurality of coupling and biasing members, each interposed between the secured area and the corresponding anchored area. Rotation of the hub member is transmitted to the surrounding workpiece contacting member to bring the surrounding workpiece contacting member into contact with the workpiece so as to feed the workpiece with an even and smooth compression force.

Abstract: A log processor and log processing method scans a log (L) at a first station (18) so that the longitudinal centerline (32) and a sawing scheme for the log can be automatically determined by a controller (4). The log is oriented at a second station (24) so that the longitudinal centerline is oriented with respect to a vertical plane passing through the feed line. The position of the log is automatically adjusted at third and fourth stations (36, 42) so that the saw blade path (56) through the log is generally parallel to the feed line as the log passes a log exit (12) and through a saw (14). The sawing scheme can include variable tapering sawing from split taper sawing to full taper sawing. Differential steering chain assemblies (37) may be used at the fourth station and may each include continuous loop, log-engaging chains (106) which engage the log above and below the log. Log chipping, profiling heads (62) may be used on either side of the feed line, such as at a fifth station.

Abstract: A molding machine for machining workpieces of wood or plastic material has a transport path for transporting workpieces in a transport direction and adjustable spindles arranged sequentially in the transport direction on the transport path. Tools are fixedly connected on the spindles. Adjusting elements are drivingly connected to the spindles. First indicator devices are coupled to the adjusting elements and indicate a position of the spindles relative to a reference point of the machine, respectively. At least one data storage device is connected to the indicator devices and configured to save position data of the spindles and to allow retrieval of the position data of the spindles.

Abstract: An automated planer machine for planing a piece of lumber. The planer machine has a feed table for slidably receiving the bottom surface of the piece of lumber along a traveling course. One or more planing heads extend on sides of the traveling course to plane the surfaces of the piece of lumber. A linebar laterally guides the piece of lumber. Feed rolls along the traveling course move the piece of lumber. Positioning devices responsive to respective control signals are provided for adjusting a height of the feed table and planing levels of the planing heads as much when the planer machine is idle as during operation. Position encoders coupled to the feed table and the planing heads produce positional signals usable to accurately position them using the positioning devices.

Abstract: In a height-adjustable workpiece feeding device for a wood planing machine, two rollers are journalled on two cam follower units which are respectively slidable along two guideways in a support carriage between upper and lower positions. A connecting rod unit has two cam units secured thereon, and is rotatable transverse to the rollers so as to synchronously rotate the cam units between first and second positions, where first and second regions of cam surfaces of the cam units abut against the cam follower units, respectively, thereby placing the cam follower units, as well as the rollers, in the upper and lower positions.

Abstract: A log processing machine and associate method employs one or more log guides to make joinery cuts in a processed log which has at opposed edges of the processed log the raw log's natural external contour. In a preferred embodiment of the invention, each log guide includes a straight edge and is attached to the processed log to create an artificial straight edge for guiding the processed log through the joinery machine. Prior to attachment, centerlines are marked on the log guide and the processed log, and the centerlines are aligned when the log guide is attached to the processed log. The processed log, with the log guide attached, is then moved through the machine with the aid of computer control while the straight edge of the log guide follows a fence. In this manner, the position of the processed log and its centerline are always known so that the computer can make the programmed joinery cuts with high precision.

Abstract: A method of producing the floor-bridging units, which increases production rate of the floor-bridging units. First rough lumber beams are fed through a planer, which planes the lumber to the required consistent size tolerance. The planed lumber is transferred to a cut-off saw to cut the legs. The legs are transferred to a dado machine and a dado slot is cut into the lumber. The legs are transferred to a joining station to form the X member, where the dado slots are joined into a dado joint by gluing and stapling the joint. The X member is transferred to a trimming station to be trimmed. At the same time flanges are being made by cutting sheet lumber in strips and then into rectangles to form the flanges. The flanges are transferred to a nailing jig, while glue is applied to the trimmed ends of the legs of the X members. The X members with the applied glue are transferred to the nailing jig.

Abstract: The invention relates to an arrangement at the discharge end of a debarking machine (12) for the preliminary debarking of logs (2) prior to a separately performed final barking and for the expulsion of at least some of the removed barks from a wood flow passing through the debarking machine. The debarking machine (1) has its discharge side provided with an extension (5), continuing from the lower section level of the support surface of the debarking machine used for bearing the logs (2), and guiding the logs (2) discharging out of the debarking machine (1). The extension may include a variable speed conveyor (7), varying the speed of which influences the admission rate of logs into the debarking machine and the dwell time of logs therein.

Abstract: A machine for machining workpieces of wood and plastic has a transport path for transporting workpieces through the machine. One or more driven spindles having a tool for machining the workpieces transported through the machine are provided. An adjustable element that is adjustable relative to the tool is provided. At least one data storage is provided for storing data at least of the tool wherein the data are used to determine a position of the adjustable element relative to the tool and are retrievable. In the method for adjusting the machine, characteristic data of the tool are measured and stored in the data storage. The characteristic data are supplied to a control unit. In the control unit positioning data for the adjustable element are calculated based on the characteristic data and then made available for processing the workpieces.

Abstract: A roller for grasping a log for axial movement or rotation of a log, the roller including spike bar retainers fastened on the cylindrical surface of the roller. The spike bar retainers accept and retain replaceable spike bars, thus facilitating replacement of worn spikes, which may be replaced without removal of the roller. The spike bars formed of alloy steel feature an improved type of spike having planar side surfaces that converge to a pointed end. The improved spikes grip and hold logs at lower average pressures over an extended period of use than conventional conical spikes.

Abstract: A method and apparatus for improved centering of a workpiece in a surfacing machine includes centering assembly having a plurality of individually movable biasing element sets, comprising an upper element and a lower element. Each element set is operatively connected to a closed circuit, double rod end hydraulic cylinder assembly which selectively and independently positions the element set responsive to the surface to the workpiece. The hydraulic cylinder assembly includes a valve. A pressure device is also operatively connected to each element set to provide a centering force. In use, as the upper or lower element of an element set is forced away from the centerline of the workpiece, the opposing element would automatically move the same amount when the valve is closed. When the valve is open, the upper and lower elements are free to move independently, allowing the centerline to be easily positioned as desired.

Abstract: A roller for grasping a log for axial movement or rotation of a log, the roller including spike bars fastened on the cylindrical surface of the roller. The spike bars are formed of alloy steel feature an improved type of spike having planar side surfaces that converge to a pointed end. The improved spikes grip and hold logs at lower average pressures over an extended period of use than conventional conical spikes.

Abstract: A fluted feed roll has inner replaceable flute inserts which abut and are bolted to anchor pieces welded in place on a cylindrical roll body. Part of the inner longitudinal edge of the flute inserts bears directly against the surface of the roll body. Traction elements on the outer longitudinal edge of the flute inserts protrude radially outwardly beyond the anchor pieces.

Abstract: Material-recovery apparatus for obtaining usable, uniformly-dimensioned blanks from scrap. Apparatus is small, and economical in manufacture and operation, using only a single lifting jack and vertical support unit to support the tool-and-feed-roller housing. Feed-roller tensioning units for exerting downward force on rollers have a spring-biased bell-crank mechanism.

Abstract: A roller for grasping a log for axial movement or rotation of a log, the roller including spike bars fastened on the cylindrical surface of the roller. The spike bars are formed of alloy steel feature an improved type of spike having planar side surfaces that converge to a pointed end. The improved spikes grip and hold logs at lower average pressures over an extended period of use than conventional conical spikes.

Abstract: A fluted feed roll has inner replaceable flute inserts which abut and are bolted to anchor pieces welded in place on a cylindrical roll body. Part of the inner longitudinal edge of the flute inserts bears directly against the surface of the roll body. Traction elements on the outer longitudinal edge of the flute inserts protrude radially outwardly beyond the anchor pieces.

Abstract: A machine for planing large wood timbers or other heavy wood products easily by self-propelling along the work piece and planing the wood surface as it goes. The machine has a set of planer knives driven by a power source, a set of rollers before and after the knives for self feeding the planer down the work, and a flat surface in front and behind the rollers and cutting knives for stability and smoothness. The roller may also be adjusted in relation to the cutters for depth of cut and/or slightly angling the cut to one side. Centering guides keep the unit balanced on the work piece. There can be multiple feed rollers in front and behind the planer knives.

Abstract: This invention relates to an improved separator, commonly referred to as a “lath”, “stick”, “sticker”, or “crosser”, that is used in the lumber industry to separate pieces of lumber in a stack or bundle. The separator features, in one embodiment, a plurality of grooves traversing the length of the separator to permit air circulation within the grooves, and a plurality of ridges between the grooves to support the pieces of lumber. In another embodiment, a second plurality of grooves traverse the length of the separator and the first grooves to form a cross-hatching of grooves to permit air circulation within the grooves, and forming a plurality of protrusions to support the pieces of lumber over the grooves.

Abstract: A method and apparatus for improved centering of a workpiece in a planer machine includes centering sectional shoe assembly positioned in close proximity to opposed cutting heads, between the cutting heads and a centering feed assembly. The shoe assembly includes a plurality of individually movable pressure shoe sets, comprising an upper shoe and a lower shoe. Each shoe set is operatively connected to a closed circuit, double rod end hydraulic cylinder assembly which selectively and independently positions the shoe set responsive to the surface to the workpiece. A pressure device is also operatively connected to each shoe set to provide a centering force. In use, as the upper or lower shoe of a shoe set is forced away from the centerline of the workpiece, the opposing shoe would automatically move the same amount. The shoe assembly thus centers each and every workpiece independent of the amount of stock removal required.

Abstract: A wood planing machine includes a base, two pairs of supporting rods respectively extending upright from the base, a cutter carriage including a pair of parallel carriage seats mounted movably and respectively on the pairs of the supporting rods, an emery axle mounted rotatably on the carriage seats and movable upward and downward relative to the carriage seats, and an axle height adjusting unit including a lever mounted on the carriage seats above the emery axle, and a pair of linkage plates interconnecting the lever and the emery axle. The lever is an eccentric rod, and is turnable about a horizontal axis so as to move the emery axle upward and downward.

Abstract: A fluted feed roll has inner replaceable flute inserts which abut and are bolted to anchor pieces welded in place on a cylindrical roll body. Part of the inner longitudinal edge of the flute inserts bears directly against the surface of the roll body. Traction elements on the outer longitudinal edge of the flute inserts protrude radially outwardly beyond the anchor pieces.

Abstract: To make the usable wood volume of the tree trunks as large as possible, octagonal or dodecagonal dressed timbers are proposed from which then boards or beams with inclined edges are cut. To produce octagonal or dodecagonal dressed timbers, in a first machining stage (11) two side surfaces (13) are milled off the tree trunk, it is then turned by 90° and two additional side surfaces (19) are milled off in a second machining station (17). Immediately thereafter in another machining station (21) with four (for octagonal dressed timbers) or eight (for dodecagonal dressed timbers) milling cutters (22) the remaining rough edges (20) are milled off.

Abstract: A device for producing squared timber from tree trunks includes a feed section, a machining center, and a delivery section; the feed section has at least two grippers which can be placed against the tree trunk to be machined and using which the tree trunk is supplied to the machining center; the machining center has several plan cutters and feed rollers in order to advance the tree trunk, while it is machined by cutting at the desired locations. The square beam is transported from the machining center onto the delivery section and then removed for further machining. The grippers may be made such that they hold the tree trunk regardless of its diameter at a height which at least roughly corresponds to the axis of the machining center.

Abstract: A feed wheel (24) for use in a wood working machine (10) in which the feed wheel is rotated while in driving engagement with a wood piece to drive the wood piece past a wood working element. The feed wheel is preferably driveable in one direction only and is freely rotatable in the direction opposite to that for feeding. The feed wheel is preferably formed of a hub part (40) and a rim part (38) which is separable from the hub part. The rim part includes teeth arranged to extend at a helix angle relative to the axis of the wheel and the teeth are preferably provided with a wear-resistant diamond layer for engaging the wood piece.

Abstract: A single-grip harvester head comprises a frame (1, 2), which defines a tree feeding path, and two feeding roller arms (5), which are pivotable in relation to the frame (1, 2) about a pivot axis (A1) each defined by a pivot pin (6) and which support a rotatable feeding roller (7) each. Each feeding roller arm (5) is formed as an angular lever with two lever legs (5a, 5b), the feeding roller (7) being supported at the free end of one of the legs (5a) and the pivot pin (6) of the feeding roller arm (5) being positioned in the angular area between the legs. The two pivot axes (A1) are located in a common plane perpendicular to the tree feeding path. Each pivot pin (6) is articulated to the frame (1, 2) at one of its ends by means of a ball joint (13) and controlled at its other end, in such a way that the pivot axis (A1) is movable in said plane but fixed in a direction perpendicular to this plane.

Abstract: Apparatus request for debarking logs comprising a generally horizontal rotary drum debarker having an inlet end, power drive device for continuously rotating the drum of the debarker generally about a horizontal axis, generally horizontal main conveyor element for conveying groups of tree length logs toward the drum, the main conveyor element having a discharge end below the axis of rotation of the drum, drive apparatus for continuously driving the main conveyor element, and auxiliary feed mechanism below the axis of rotation of the drum and between the discharge end of the main conveyor element and the inlet end of the drum for assisting the movement of groups of logs fed by the main conveyor element into the inlet end of the drum. The questions raised in reexamination request No. 90/003,655, filed Dec. 7, 1994, 90/003,826 filed May 8, 1995, and 90/004,552 filed Feb.