Abstract: An improved knife mounting arrangement is provided for a rotary cutter or perforator having a cutter cylinder with a longitudinally extending slot and a knife blade located in said slot. The back edge of the blade is spaced from the bottom of the slot and the cutting edge of the blade protrudes from the slot. A wedging member is fitted in the slot to clamp the blade in a seated position to cooperate with an external anvil. Preloading springs act on the wedging member with a force sufficient to retain the blade during mounting and seating operations, while allowing limited movement of the knife blade into the slot. Holding bolts act on the wedging member in addition to the preloading springs to secure the position of the knife blade after it is seated against an anvil.

Abstract: A planing apparatus comprises a knife replaceably mounted in a carrier and having two parallel major faces and two parallel minor faces inclined with respect to the major faces whereby the cross section of the knife forms a parallelogram, each of the minor faces forming a knife edge at their intersection with the major faces. A knife support supports the knife in the carrier and includes a first transverse ledge holding the knife in place and a second transverse ledge spaced from the knife. The second ledge has a thickness in slight excess of the thickness of the knife.

Abstract: The periphery of the chipping drum carries one or more axial rows of individual chipping bits in which the bits of adjacent rows are in staggered relationship if there is more than one row, and further carries an evening knife located in a position trailing the row or rows of individual cutting bits. The individual cutting bits are located with reference to ridges of the circumferentially corrugated drum periphery so that each ridge is disposed substantially centrally of a cutting bit. The anvil is corrugated complementally to the chipping drum periphery and is located so that the cutting edges of individual bits move through notches of the anvil. The evening knife moves close to the projections between the anvil notches.

Abstract: A helical cutterhead for a wood planer for reducing noise level during planing by supressing vibration and sound radiation by having more than one knife blade engaged in the workpiece at any instant by satisfying the minimum condition of the formula L=.pi.D cot.phi./N is less than the workpiece width and in which L is the contact distance, D is the cutterhead diameter, N is the number of knife blades, and .phi. is the helix angle, and in which L is less than 4 inches.

Abstract: A rotary cutter, in the nature of a milling cutter, especially for agglomerated foam plastic, has a body with a concentric surface of revolution onto which are brazed block-like carbide cutting elements. The cutting edges of circumferentially adjacent cutting elements lie on lines spaced apart circumferentially by between 0.60 in. (15 mm.) and 0.165 in. (17 mm.), and the kerfs of such cutting elements overlap. The cutting elements are received in shallow axially extending grooves in the body; their axial locations are established by reference to lines scribed around the body at uniform axial intervals.

Abstract: A cutter shaft for a wood machining apparatus is provided with at least one pocket in which a cutting knife is arranged between a pressure plate and a wear part with the cutting edge of the knife projecting beyond the peripheral surface of the shaft. A wedge located in a cutout of the shaft, intersecting the pocket, is guided in the cutout movable substantially in radial direction of the shaft and engaging with a wedge face, inclined at a predetermined angle with respect to the radial direction, a corresponding face of the pressure plate to press the latter against one side face of the knife and therewith the other side face against said wear part. The aforementioned angle between the two engaging faces is outside the self-locking range and at least 35.degree. and preferably about 42.degree.. The wedge is biased by a spring in radial outward direction and, during rotation of the shaft, also by centrifugal force.

Abstract: The head of a rotary cutting tool has an axially extending slot defining a flat, radially outwardly facing bottom surface and opposite undercut side surfaces, at least one of which makes an acute angle to the bottom surface. A cutter insert has a lower base portion in the slot and a cutting edge on an upper portion. The base portion comprises two wedging elements having opposite complementary tapers in width along their lengths to be relatively lengthwise adjustable for varying the width of the base portion. One wedging element is integral with said upper portion and is releasably maintained under radially outward force to be wedged between the other element and said side surface of the slot, thus holding the cutting edge at a distance from the tool axis determined by the lengthwise adjustment of the wedging elements.

Abstract: Wood chipping apparatus including a removable wood chipping cartridge in the form of a hollow drum having axial extending wood chipping knives positioned adjacent to wood chip receiving apertures in the drum. The drum is removably connected, at one end, to the end of a drive shaft, whereby the drum is supported in a cantilever fashion. For knife sharpening, the entire cartridge is removed and replaced with a cartridge having sharpened knives.

Abstract: Mechanism is provided for grooving or planing wood products either lengthwise or crosswise. Such grooving may be preparatory to the interdigital end to end interfitting of work pieces, commonly referred to as finger-jointing, or to simple planing which involves the continuous, uniform smoothing of a surface from end to end throughout its entire width, or to uniform longitudinal or transverse slotting. In any of these operations the cutting blade edges become dull and require resharpening from time to time. Conventionally the outer face of the blade which confronts the work is ground away for sharpening, and this has the unfortunate consequence of shortening the blade and thereby reducing the depth of cut. In accordance with the present invention this difficulty is overcome. The blade is formed with parallel, upwardly and forwardly sloping inner and outer faces, and the blade is sharpened by evenly grinding away the forward face of the blade.

Abstract: A machine for cutting wood chips to shavings comprises a rotatable drum having circumferentially spaced cutting members connected to a feed passageway. The latter extends along a substantial portion of the length of the drum and houses feed screws forcing the chips into contact with the cutting members. The drum is surrounded by a housing with a widened portion defining a wedge-shaped cutting chamber. The formed shavings pass inside the drum in the longitudinal direction thereof to the outlet of the machine.

Abstract: A cutter for removing chips from wood has a rotary carrier whose peripheral surface is formed with rearwardly and inwardly inclined recesses for permanent magnets which attract plate-like blades having cutting edges which extend radially outwardly beyond the peripheral surface of the carrier. The blades consist of magnetic material and are attracted to the permanent magnets. The magnets have dovetailed projections extending into complementary grooves of the carrier. Each blade is urged against the respective magnet by a spring-biased wedge in the respective recess, and the inner edge of each blade bears against a plate-like abutment which is attracted to the respective magnet.

Abstract: A tool for removing shavings from wood has a rotary main body portion provided with recesses extending inwardly from the peripheral surface and receiving elongated plate-like holders for flat blades made of sheet steel. Each blade is formed with openings for locating pins on the respective holder, and each holder is urged toward an internal surface of the body portion by a spring-biased wedge. Strip-shaped guide members are adjustably connected with the holders and are slidable in grooves machined into the internal surfaces of the body portion. A blade can be removed or inverted by moving the respective wedge away from the holder and by thereupon moving the holder axially of the body portion so that the blade can be lifted off the locating pins. The holders and the guide members have cooperating surfaces along which the holders can slide to thereby move the cutting edges of the blades toward or away from the axis of the body portion.

Abstract: A cylindrical rotary cutting head rotatable about a longitudinal axis having a plurality of helical slots in which a plurality of bits carrying cutting edges are retained in the lateral direction by means of set screws which bear against a "V" groove in an inclined face of the bit and in the vertical direction by plurality of cooperating serrations on an opposite face of the bit and in one slot wall.

Abstract: Method and apparatus for comminuting a tree stump in its entirety while still rooted in the ground, utilizing a large, heavy cylindrical roller or drum rotating at high speed and having cutters mounted on a peripherical surface thereof for engaging and comminuting the stump from the side thereof. The roller is journaled for rotation about a horizontal axis in a carrier attached to the front end of a heavy four-wheel vehicle which is driven hydraulically over the ground surface from a selfcontained power source such as an internal combustion engine. The hydraulic system which drives the vehicle also includes a hydraulic motor mounted on the carrier for rotating the roller. The roller, through the carrier, is mounted to the vehicle frame for swinging movement in a vertical plane relative to the ground and a hydraulic cylinder included in the hydraulic circuit is provided for effecting said vertical swinging movement.

Abstract: A noise reducing cutterhead for planers which includes a cylindrical cutterhead member having a plurality of circumferentially spaced axial grooves therein receiving cutter blades, the blades having an axial length less than the length of the cutter head, the blades being spaced from one another in each groove and the blades in successive grooves being staggered in axially offset relationship, the blades being held in place in the cutterhead by a wedge lock member and being adjustably received in the grooves.