Abstract: In a profiled inserted-blade cutter, with blades (13) which can be re-sharpened without altering the profile and trajectory, each blade (13) is secured to a blade holder (14) having a base with a T-shape cross section, one arm (16) of the transverse section of which engages in a first longitudinal groove (4) in the basic unit (2). The other arm (17) engages in a second longitudinal groove (5) also in the basic unit (2) and open towards the first groove (4). The flanks of the first and second longitudinal grooves (4, 5) at a greater distance from the central longitudinal axis of the basic unit (2) lie in planes which are mutually parallel and parallel to the longitudinal axis of the basic unit and each form a positioning surface (6, 7) for one or other arm (16, 17) of the transverse section. On the blade holder (14) there is a clamping surface (15) which encloses a radially outwardly opening angle with the frontal surface (13') of the blade (13) and an acute angle with the adjacent positioning surface (7).

Abstract: The invention concerns a cutter head, in particular a planing cutter head, whose blade carrier (1) has at least one mounting (5), facing radially outwards, for a blade (7). Fitted in each mounting (5) is a wedge grip (17) which can be moved relative to the blade carrier (1) and which presses the blade (7) against a stop (9) on the mounting (5) when moved with at least a component of motion radially outwards. Located between the blade (7) and the wedge grip (17) is a mounting strip (21) which can be moved relative to the wedge grip (17) and the stop (9) on the mounting (5) and which releases the blade (7) for removal radially outwards when the wedge grip (17) is displaced inwards.

Abstract: The invention relates to a knife assembly for slicing woodwool, comprising a knife with a chip surface (1), a clearance surface (2) and a cutting edge (3), defined by the intersection between both surfaces. The knife assembly is characterized by guiding ribs (4) extending perpendicularly to the cutting edge (3) and joining the chip surface (1) with an end (5) that substantially coincides with the cutting edge (3) and with the guiding surface joining said end and rising there towards. The guiding ribs (4) can be formed integrally with the knife.

Abstract: The present invention provides a replaceable insert cutting tool combination. The combination comprises a cutter head having at least one peripheral transverse indentation and being rotatable about an axis, the cavity including a knife support wall at least partially transverse to the cutter head periphery, and at least one threaded bore substantially parallel to the knife support wall. The combination further comprises a knife element disposed adjacent the knife support wall and having an edge extending from the indentation, in addition to at least one threaded element for engagement in the threaded bore. At least a pair of wedging elements are mounted adjacent the knife element in engaging side-by-side relation in the indentation.

Abstract: An interchangeable chipper tool attachment for a hog allows a hog machine to operate as either a hog or a chipper. An operator of the hog machine can remove hammer tools used in the hog and replace them with the chipper attachment. The chipper attachment includes knife receiving area, a knife support receiving area, and a fastener portion for mounting the tool holder to rotor disks on the rotor assembly of the hog machine. A knife assembly, including a chipper knife, is coupled to the tool holder at the knife receiving area and points in the direction of rotation of the rotor. A knife support block supports the chipper knife and is coupled to the tool holder at the knife support receiving area, a lateral face of the tool holder adjacent to the knife receiving area. When mounted in an interleaved fashion between the rotor disks of the rotor assembly, the chipper knife rotates in a circular path and produces chips by cutting wood waste against an anvil on the hog.

Abstract: An improved system for mounting replaceable cutter blade insert for a thread milling tool including, and improved wedge mounting construction for readily mounting and aligning the insert in position on the cutting tool.

Abstract: Wood wafers are produced by feeding logs to a rotary cutter head drum with the longitudinal axis of the logs disposed substantially parallel to the rotational axis of the drum. The drum mounts a plurality of wafer cutting head units arranged in a V-shaped pattern with the apex of the V trailing the base thereof and with the cutting blades defining the ends of the base positioned at the opposite ends of the operative length of the drum. Each wafer cutting blade having a cutting edge disposed substantially parallel to the axis of the drum and offset circumferentially and axially from an adjacent cutting blade so that the cut produced by a cutting blade overlaps the cut produced by the next adjacent preceding cutting blade.

Abstract: A milling cutter tool includes a rotary body having recesses spaced along its outer body, each recess receiving an insert-carrying cartridge and a wedge for retaining the cartridge. Leading and trailing surfaces of each recess converge radially inwardly, whereas leading and trailing surfaces of each wedge converge radially outwardly. An actuator pushes each wedge radially outwardly into clamping relationship with the cartridge.

Abstract: A removable cutterhead insert for use in a helical cutterhead for an industrial woodworking machine, the helical cutterhead including a generally cylindrical portion, a plurality of circumferential, spaced grooves extending into the cutterhead body from the periphery of the cylindrical portion and adapted to receive the removable cutterhead inserts, and fasteners for removably securing the cutterhead inserts in the grooves; the cutterhead insert includes a mild steel insert body and two blade units; the insert body having raised portions having triangular pockets formed therein so as to have two inwardly-facing flat portions, a hole to receive the fasteners for removably securing the cutterhead insert in the grooves between the inwardly-facing flat portions and two bolt holes to secure the two blade units to the insert body; and the blade units are triangular with cut-off corners each including a blade edge and configured so as not to occlude the countersunk hole and to have the blades edges disposed to align

Abstract: A blade assembly for a shredding machine is presented which can be used in the method for replacing broken blades and when rebuilding the blade seat. The method includes milling the base support to reduce its height and redrilling the blade bolt holes. A new independent blade seat is then affixed by double-threaded bushings after which a new blade can then be bolted atop the blade seat.

Abstract: A waste debarker 10 comprises a housing 12 in which is mounted a rotatable first cutting drum 14 and a rotatable second cutting drum 16 arranged in a longitudinally spaced relationship with respect to the first drum 14. The first drum 14 has a plurality of circumferentially extending flanges 24 spaced along the length thereof for supporting cutting teeth 26 thereon. The second drum 16 has a plurality of discrete lugs 34 arranged on its surface for supporting cutting teeth 26 thereon. The lugs 34 are offset with respect to the flanges 24 on the first drum 14 and extend in between the flanges 24 as the drums 14,16 are rotated. The second drum 16 is located at a higher elevation than the first drum 14. A method of debarking waste material is also provided.

Abstract: A method of planing a variety of widths of workpieces includes transporting workpieces through a machining area having a rotating cutterhead that includes a series of helically mounted cutting blades spaced circumferentially on the cutterhead and positioned such that one cutting blade engages the workpiece simultaneously as another cutting blade disengages the workpiece, the transporting step including consistently arranging the workpieces with respect to the rotating cutterhead so that the dimension of each workpiece parallel with the axis of rotation of the cutterhead has a value W and the cutterhead being such that the spacing between the cutting blades being such thatW/[(.pi. D(cot .phi.))/N] is an integer, in whichD is the cutterhead diameter,N is the number of cutting blades and.phi. is the helix angle.

Abstract: A cutterhead for an industrial woodworking machine comprising a cutterhead body having a cylindrical outer surface with at least one insert-receiving groove extending into the body from the outer surface; at least one cutting insert secured in the groove, the insert being comprised of an insert body, a blade attachment gib, and at least one detachable blade, each blade being secured adjacent the insert body by the blade attachment gib. The upper end of the gib preferably projects above the cutterhead body and is adapted to turn chips from the blades, which project above the attachment gib. Fasteners secure the blades between the body and the attachment gib, and the insert in the groove.

Abstract: A rotary cutter head includes integral clamping members for releasably securing cutting blades in recesses formed in the cutter head. Each clamping member is formed with a free end portion which defines one side of the recess. An end of the clamping member located oppositely of the free end portion is integrally connected to the cutter head and defines a resilient hinge portion. The free end portion is resiliently biased by the integral hinge portion to a position which allows the blade to be slidably received in the recess. Threaded fasteners are operable to cause the free end portion to pivot about the hinge portion and to drive the free end portion toward an oppositely located side of the recess so as to clamp the blade in the recess.

Abstract: A removable cutterhead insert for use in a helical cutterhead for an industrial woodworking machine, the helical cutterhead including a generally cylindrical portion, a plurality of circumferential, spaced grooves extending into the cutterhead body from the periphery of the cylindrical portion and adapted to receive the removable cutterhead inserts, and fasteners for removably securing the cutterhead inserts in the grooves; the cutterhead insert includes a mild steel insert body and two blade units; the insert body having raised portions having triangular pockets formed therein so as to have two inwardly-facing flat portions, a hole to receive the fasteners for removably securing the cutterhead insert in the grooves between the inwardly-facing flat portions and two bolt holes to secure the two blade units to the insert body; and the blade units are triangular with cut-off corners each including a blade edge and configured so as not to occlude the countersunk hole and to have the blades edges disposed to align

Abstract: In a cutting blade mounting arrangement for inserted blade cutting heads a mounting plate for supporting a cutting blade at one side thereof has at its opposite side a tooth structure for firm engagement with the cutting head and the cutting blade has ground bores receiving cylindrical fitting pins projecting from the one side of the support plate for accurately positioning the cutting blade on the support plate in axial as well as in radial direction with respect to the axis of the cutting head.

Abstract: To provide a reliable, yet resilient, seat for a cutter blade or knife (13) in a rotary milling body (11), the milling body is formed with a bore (21) which intersects the inner wall (19) of a recess (12) in the circumference of the milling body (11). A roll pin is inserted in the bore, retained therein, but projecting over the plane of the wall surface (19). The knife (13) is formed with a longitudinal groove (27), having opposite flat angled side walls (60), which fit around the projecting surface of the roll pin. A holding element (15), fitted into the recess, bears against knife and resiliently clamps it against the roll pin. Preferably, the holding element (15) and the knife (13) are formed with an interengaging projection (41) and recess (42) arrangement.

Abstract: A cutterhead, particularly for wood lathe tooling includes one or more sleeves each of which has an inner hydraulically operated circumferential gripper for securement to a rotatable arbor, and an outer, independently hydraulically operated circumferential gripper for securement to a cylinder. The outer peripheral surface of the cylinder is provided with longitudinal dovetail ribs. Knife carriers and space-filling limiters slide axially onto these ribs and are locked in place by set screws. Each carrier has a slot for radially receiving a knife to be gripped between a wedge and a corrugated keeper. The keeper and carrier slot are keyed together to provide for radial adjustment of the knife. A threaded pin restrains slot spreading and radially retains the wedge and keeper. Wedge action prevents radial throwing of elements should someone neglect to secure the carriers or limiters, or neglect to elevate the wedges.

Abstract: The invention relates to a cutter block and a knife for chippers for removing particles of wood, which are used for producing particle board and the like. The knife is embodied as a disposable discontinuous or multiple edge knife or as a solid blade knife. The knife has retention and guiding recesses engaged form-fittingly by positioning pins of a support plate. Further, the knife is in compressive contact with a side wall face, trailing in the direction of rotation of the cutter block of the recess in the surface region of the block body.

Abstract: A planer is improved by recognizing the source of instability of a board relative to a guidebar. An angled relationship between feed roller force the guidebar and holds the board against the guidebar. Traditional cutting heads urging the board in the opposite direction relative to that of the feed rollers, develop lateral force vectors kicking the board away from the guidebar. By establishing a zero lead relationship between the cutter heads and the board as it rests against the guidebar, the board enjoys greater stability. The disclosed apparatus further includes an air regulated top pressure plate establishing a given separation between itself and a cutter head, but accommodating abnormal operating conditions, i.e., jammed boards, by vertical movement relative to the cutter head facilitates remote actuation to quickly relieve a jammed condition. Also shown, a bearing housing for a cutter head support shaft is carried on an articulated hinge to improve manual mounting of the bearing housing upon the shaft.

Abstract: A cutting blade for working logs to timber form while simultaneously removing wood chips which includes a pair of adjacent recesses formed in the periphery of the blade. A knife is bolted in the cutting blade in a first recess and a wear insert is separately bolted to the cutting blade in the adjacent recess. The bolts are countersunk so as not to extend outwardly from the knife or wear insert.

Abstract: A blade head for cutting and planing blades has a blade holder having a plurality of receiving grooves for receiving a cutting and planing blade. The receiving grooves are distributed over the circumference of the blade holder. A plurality of pressurizing elements is positioned in each of the receiving grooves for securing the cutting and planing blade in the receiving groove. At least one adjusting member is positioned in each of the receiving grooves for forcing the pressurizing elements against one another such that the pressurizing elements exert a clamping pressure on the cutting and planing blade. The pressurizing elements have a substantially cylindrical shape with wedge-shaped end faces and a circumferential surface having at least one planar clamping surface. Adjacent ones of the pressurizing elements abut one another with their end faces. The blade holder has clamping counter surfaces cooperating with the planar clamping surfaces of the pressurizing elements.

Abstract: The invention provides an improved planar which effectively prevents undesirable torn grain. The planer of the invention includes at least one planer knife or blade and at least one pressing member, both attached to and supported on a cutterhead. The pressing member includes a head element which is located to have a predetermined angle with respect to the blade and is resiliently movable in a predetermined direction to press an edge of the head element against a certain position of a wood surface immediately before a cutting edge of the blade moving in a fixed direction for cutting or against a boundary between the wood surface and a chip being currently cut from the wood surface. The direct pressing of the pressing member against the wood surface prevents rise of wood fibers and thereby effectively reduces or eliminates undesirable torn or chipped grain.

Abstract: A rotor for an impact crusher which has rotor plates distributed along the length of a rotor shaft and secured to the shaft. Aligned, open, recessed cavities in multiple rotor plates receive a backing bar spanning the plates and the bar is secured to the plates. A removable hammer bar seats in the cavities and rests against the backing bar. Wedges held in place by retainers hook the hammer bar in place.

Abstract: A blade mounting for a chipper blade of a wood-chipping machine, the chipper blade having a back and a fore-part, the blade mounting including: a disk coverplate having an inner slope which bears against the back of the chipper blade; a blade holder having at least two grooves which are oriented perpendicular to a longitudinal axis of the blade holder and parallel to a plane of the chipper blade, the blade holder bearing against the fore-part of the chipper blade; adjusting screws located in the grooves in the blade holder; and dogs for underpinning a bottom edge of the chipper blade at at least two locations, the dogs being adjusted by the adjusting screws.

Abstract: A knife blade clamp for a Carthage-Norman type of log chipper and having a substantially right triangular cross-sectional contour having an upper face, back face and hypotenuse surface, is provided with a series of slots on its back face. The slots communicate between an elongated depression on the back face and the hypotenune surface. By virtue of the series of slots, there is less accumulation of fine dust adjacent the back face which would thwart the removability of the associated knife for servicing.

Abstract: A cutting roll of the type with a cylindrical base member and at least one substantially axially-parallel blade attached thereto for separation of sugarcane, sweet sorghum, and the like. Grooves in the base have serrated walls engaging serrated sides of blade members, and wedging members secure the blades in proper radial adjustment in the grooves. A plurality of blade segments in each groove and a slight angling of the serrations allows blade rotation and provides a highly accurate and easily adjustable cutting roll.

Abstract: A rotary cutting die assembly is comprised of a support roll having a cylindrical exterior surface with a first axial slot formed in the exterior surface and extending a first depth into the support roll, and a second axial slot formed in the exterior surface adjacent the first slot and extending a second depth into the support roll, the second depth being less than the first depth. A cutting blade, shim and lock-down bar are received in the first slot of the support roll. The lock-down bar supports a plurality of set screws oriented at an acute angle relative to the cutting blade. Tightening the plurality of set screws in the lock-down bar causes the set screws to urge the cutting blade and bar apart from each other and into friction engagement against the opposite sidewalls of the first slot, thereby securing the cutting blade and mounting bar in the first slot.

Abstract: A drum chipper having a rotatable, power-driven drum supporting a knife. With rotation of the drum, a cutting edge in the knife is moved past a cutter bar. A knife mounting keyed to the knife is adjustably positioned along a path in the drum to position the knife. The knife is a double-edged knife, with one edge replacing the other with dulling of the latter edge.

Abstract: The invention relates to a rotatable blade (11) for clearing units having a plurality of teeth (1) spaced around the periphery of the blade. The teeth (1) are dismountable and/or replaceable and symmetrically shaped with several cutting edges (3), each tooth fitting into a locking recess (10) in the blade (11) with a shape corresponding to the shape of the tooth such that only one of the cutting edges (3) of the tooth projects from the blade, the remaining cutting edges (3) being located in the recess (10). The tooth (3) can be removed from the recess (10), rotated and replaced in the recess (10) such that a new cutting edge (3) projects from the blade.

Abstract: A holder for rotating cutting knives includes a cylindrical holder including a longitudinal groove and a blade having a cutting edge and an opposed edge separated from the cutting edge by a first contact face. A gib assembly is provided for holding the blade in the groove of the holder, and includes a gib movable within the groove between a blade insertion position and a blade securing position. The gib has a second contact face that engages the first contact face of the blade when the gib is moved to the second position, and one of the first and second contact faces is provided with at least one longitudinal groove and the other of the first and second contact faces includes at least one longitudinal ridge which mates with the groove when the gib is in the second position in order to prevent the blade from slipping out of engagement with the gib means.

Abstract: A rotatable wood planing apparatus that includes a cylindrical planing knife body provided with a plurality of longitudinally extending, forwardly inclined, radially outwardly opening channels for holding knives. Parallel to each of the knife holding channels is an adjoining channel for holding a clamping means such as a gib for clamping said knives in the channels. The rear surfaces of the knife-holding channels and the forward surfaces of the knife-clamping channels are in planes that converge outwardly. A knife-holding clamp is provided to securely hold the knife in a desired position. The knives can accurately be fitted and secured into the clamps prior to insertion into the knife-holding channels.Means such as bolts or screws adjacent the rear of the knife-holding channels are provided for retaining the clamp and knife combination in the channel. A gib or wedge is fitted in the clamping channel to lock the clamps and knives in place upon elevation of the gib in its channel.

Abstract: A chipping cutter head having multiple spindle segments disposed side-by-side and forming a body in the cutter head. Circumferentially distributed pockets in each spindle segment have knife holders detachably mounted therein and held in place by clamps. Double-edged knife elements, that are replaceable, are detachably clamped in position on each knife holder.

Abstract: A centrifugally operated clamping device for clamping a reversible blade insert in a planing tool ensures positive engagement between the clamp and the blade. The clamping device includes a clamping wedge which has an inverted T-shaped cross-section and is positioned in a similarly configured groove in the tool. The wedge is biased relative to the bottom of the groove so that the clamp will be easily disconnected from the blade.

Abstract: Improved insert teeth and holder assemblies are provided for a material breaker machine intended for use in reducing chunks or pieces of wood, metal and other materials to small size. The present invention includes an insert tooth member having a pair of edges, either of which may serve as a cutting edge. An insert tooth holder is provided for mounting of the insert tooth. The insert tooth and insert holder interengage through a raised portion on the one and a recessed portion on the other which mate to form a positive mechanical lock. The insert tooth is reversibly mounted on the insert holder to allow either of the pair of edges to assume the position of the cutting edge. The location of the interengaged components allows them to be fully protected from the material being cut, thus minimizing wear and damage.

Abstract: A cutter blade projects tangentially from the peripheral surface of a solid cylindrical rotor for travel along an arcuate path in converging relation to a support surface of an anvil aligned with a horizontal travel path along which scrap lumber is continuously fed by an infeed roller into a cutting zone formed between the anvil support surface and the peripheral surface of the rotor. Oversized solids emerging from the cutting zone below the rotor are separated from a wood chip product of desired size and recirculated to the infeed roller.

Abstract: A centrifugally operated clamping device for clamping a reversible blade insert in a planing tool ensures positive engagement between the clamp and the blade. The clamping device includes a clamping wedge which has an inverted T-shaped cross-section and is positioned in a similarly configured groove in the tool. The wedge is biased relative to the bottom of the groove so that the clamp will be easily disconnected from the blade.

Abstract: Rotary cutters for ringer debarkers each have multiple cutter units secured together in coaxial staggered relation. Each cutter unit has gullets between gauge lands, and has knives in the gullets clamped against the leading side of the lands by wedging keys secured in the gullets. The staggering of the cutter units provides each knife with a gauge land on one of the other units for cutting depth control.

Abstract: A tooth for use in a comminuter roll comprises a roll of spring steel having a first end formed into a point or other abrading shape. The tooth is compressed upon insertion into a mounting hole in the roll and the inherent spring of the steel tends to force the tooth back to its original size, thereby creating forces on the interior of the mounting hole to form an interference fit that holds the tooth in place in the mounting hole. In a preferred embodiment, the tooth is formed of a roll of spring steel having a G-shaped cross section. This shape provides an opening through the length of the tooth and also leaves a solid place in the center of the tooth to aid in tooth removal. A rod can be slipped through the lengthwise opening of the first tooth so that its end abuts the solid center portion of the second tooth that is colinearly mounted in the other end of the hole that the first tooth is mounted in. Tapping the rod will force the second tooth out of its hole without disturbing the first tooth.

Abstract: A rotor assembly for a shavings making machine having a plurality of knife and wedge assemblies is disclosed. The knife and wedge assemblies are removably mounted in channels or pockets extending parallel to the rotor axis along the length of the circumference of the rotor. In mounting each knife and wedge assembly to the rotor, the knife insert is first mounted on the respective wedge insert and the wedge insert is then mounted on the rotor. The bolts or other means for mounting each knife insert on the wedge insert are located below the periphery of the rotor and adjacent one side wall of the respective channel such that the bolts cannot back out or become loosened due to vibrational forces. Each knife insert has two reversible blades which are symmetrical. A flattened surface on the rotor adjacent each knife insert assists in providing an effective cutting operation. The metallurgical composition of the knife inserts can be varied to accommodate the material in a particular application.

Abstract: An apparatus for peeling a layer from a surface, including a nonplanar surface such as the hull of a ship, comprises a rotatable substantially cylindrical support with at least two peeling knives projecting from an outer surface thereof. An annular guiding element surrounds each end of the substantially cylindrical support, and these annular guiding elements have different diameters. Preferably, the peeling knives are spaced unequally around the circumference of the substantially cylindrical support.

Abstract: A combination finger joint cutter head having a pair of adjustable cutter assemblies, that cut a plurality of finger joints in an end of a wood piece, and a pair of adjustable trim knives, wherein a single adjusting means extends or retracts the pair of knives, thereby changing the finger joint length slightly to either loosen or tighten the joint.

Abstract: A cutterhead for an industrial woodworking machine which is operable to incorporate a sufficient number of knife rows to permit a staggered tooth arrangement for noise reduction or, alternatively, to provide improved surface finish at higher feed rates without increasing cutterhead RPM. The cutterhead also provides for the generation of a variety of shapes when used with appropriately shaped individual cutting inserts. The cutterhead includes a cutterhead body having a cylindrical portion having a plurality of circumferentially spaced grooves for receiving a plurality of cutting inserts, a predetermined hole pattern in the cutterhead body for securing the cutting inserts in the grooves, and in the preferred embodiment elongated slots in the cutting inserts which permit lateral adjustment of the cutting inserts along the axis of the cutterhead. Profile shape adjustments are made through the use of a cam device.

Abstract: The present invention is in a woodworking knife or blade for mounting in a rotating cutterhead of a woodworking machine to either be in alignment with the cutterhead surface or to a table of the woodworking machine whereon wood to be planed or jointed travels. The knife or blade has at least two cutting edges of different sharpness angles ground therein, each cutting edge for machining a surface of a particular type or hardness of wood or related material.

Abstract: The impeller bars on an "open" type rotor of an impact crusher are clamped to each disc of the rotor by means of pairs of cooperating wedges. Each pair of wedges consists of a first wedge acting radially outwards of the rotor between the disc and the impeller bars and a second wedge acting axially of the rotor between the disc and the first wedge to drive the first wedge radially outwards. Means including a hook are also disclosed for lifting the impeller bars onto the rotor for initial installation as well as for later repositioning of the bars to compensate for wear.

Abstract: In a rotary cutter block each blade (14) is clamped in an inwardly divergent recess (12) by a wedge (16). The wedges (16) may be clamped simultaneously against their associated blades (14) by application of high pressure grease at any of one or more grease nipples (52, 54) which actuates by hydraulic plungers (22) in the bases of the wedge recesses (12). The angle of the wedges (16) is such as to provide a taper-lock between the wedges (16), the blades (14) and the recesses (12), which means that after depressurization the cutterblock can be stored or moved from one machine spindle to another without slackening of the wedges. The invention is of considerable advantage in reducing the amount of setting-up time involved in setting and grinding the blades of a rotary cutter head, since one pressurization is sufficient to tighten all the wedges simultaneously and to the same degree.

Abstract: A cylindrical cutter head comprises a cutter head body having a cylindrical surface which is centered on an axis and which is formed with a plurality of radially outwardly open main grooves extending parallel to the axis and each having relative to a normal direction of rotation of the body about the axis a leading flank and a trailing flank. These flanks are generally planar and converge radially outward. A disposable knife blade in each of the grooves is pressed against the trailing flank thereof by an outwardly tapered centrifugal wedge braced radially between the blade and the leading flank. Each groove is formed immediately forward of its trailing flank with a radially inwardly projecting groove extension. Thus wide regrindable blades can be fitted in the groove with their rear edges seated in the respective groove extensions.

Abstract: A system is provided for installing, retaining and replacing the saw-teeth strip inserts of rotatable, cylindrical feedrolls, without concomitant damage thereto. More specifically, a plurality of circumferentially spaced, longitudinally extending grooves are formed in the body of the feedroll. Each groove is adapted to receive a pair of spaced, parallel saw-teeth strip inserts and maintain them at a predetermined position therein. A wedge is insertable into the groove between the inserts. The wedge is adapted to abut the lower portion of the inserts to clamp them against the groove side walls. A plurality of fasteners, such as allen head screws, are inserted through spaced, aligned bores formed in the wedge and are secured in the groove floor. The fasteners function to releasably secure the saw-teeth strips and wedge within the groove.

Abstract: A cutting tool for a planer or similar machine is described. The tool comprises a flat blade having a straight cutting edge, a blade holder for holding said blade for rotation about an axis and means for locating said blade on said holder to have said blade present one cutting angle at one axial end and a different cutting angle at an opposite axial end, and to have the two opposite axial ends of the cutting edge of the blade located substantially at the same distance from the axis of rotation of the blade holder.

Abstract: A cylindrical cutter head for a wood planing machine has mounted in its cumference a number of disposable knife blades which are clamped in place with the help of centrifugal wedges in lengthwise grooves. Between each disposable knife blade and each centrifugal wedge there is positioned a bracket of L-shaped profile consisting of a base strip which is immovably attached to the cutter head body and a clamping strip bearing against the knife blade, this clamping strip being elastically deformable to a small extent. By means of a conformal relation of a profiled region of the disposable knife blade with a corresponding profiled region of the clamping strip, the disposable knife blade is held firmly in position when clamped in. After loosening of the centrifugal wedge, the disposable knife blade can be easily withdrawn in a lengthwise direction and can be replaced with accurate positioning.