Abstract: A core for a fire rated door includes an extruded fire resistant material, a filler material and a panel. The extruded fire resistant material has a first raised portion, a second raised portion and a lower portion that extends from a first end to a second end. The first raised portion has a first thickness and a first width that extends from the first side to the lower portion. The lower portion has a second thickness. The second raised portion has the first thickness and a second width that extends from the second side to the lower portion. The filler material is disposed above the lower portion of the extruded fire resistant material between the first raised portion and the second portion. The panel is attached to the first raised portion and the second raised portion of the extruded fire resistant material and covers the filler material.

Abstract: The present invention provides a system, method and apparatus for producing fire rated doors having added strength, better finishing and low cost manufacturing flexibility. The fire rated doors are made from two panels “sandwiched” together. An optional interior layer (e.g., fire resistant material, lead sheeting, steel or Kevlar) can be added between the door panels for various purposes. Splines, stiles or sticks are inserted in longitudinal channels in the door panels to provide assistance in aligning the door panels and greater hardware holding strength. An intumescent banding material concealed by a banding material around the perimeter of the door seals the door within its frame during a fire. The door design and the automated manufacturing process provide greater design choice, reduced cost and faster fabrication.

Abstract: The present invention provides a system, method and apparatus for producing fire rated doors having added strength, better finishing and low cost manufacturing flexibility. The fire rated doors are made from two panels “sandwiched” together. An optional interior layer (e.g., fire resistant material, lead sheeting, steel or Kevlar) can be added between the door panels for various purposes. Splines, stiles or sticks are inserted in longitudinal channels in the door panels to provide assistance in aligning the door panels and greater hardware holding strength. An intumescent banding material concealed by a banding material around the perimeter of the door seals the door within its frame during a fire. The door design and the automated manufacturing process provide greater design choice, reduced cost and faster fabrication.

Abstract: The present invention provides a system, method and apparatus for producing fire rated doors having added strength, better finishing and low cost manufacturing flexibility. The fire rated doors are made from two panels “sandwiched” together. An optional interior layer (e.g., fire resistant material, lead sheeting, steel or Kevlar) can be added between the door panels for various purposes. Splines, stiles or sticks are inserted in longitudinal channels in the door panels to provide assistance in aligning the door panels and greater hardware holding strength. An intumescent banding material concealed by a banding material around the perimeter of the door seals the door within its frame during a fire. The door design and the automated manufacturing process provide greater design choice, reduced cost and faster fabrication.

Abstract: The present invention provides a system, method and apparatus for producing fire rated doors having added strength, better finishing and low cost manufacturing flexibility. The fire rated doors are made from two panels “sandwiched” together. An optional interior layer (e.g., fire resistant material, lead sheeting, steel or Kevlar) can be added between the door panels for various purposes. Splines, stiles or sticks are inserted in longitudinal channels in the door panels to provide assistance in aligning the door panels and greater hardware holding strength. An intumescent banding material concealed by a banding material around the perimeter of the door seals the door within its frame during a fire. The door design and the automated manufacturing process provide greater design choice, reduced cost and faster fabrication.

Abstract: The present invention provides a system, method and apparatus for producing fire rated doors having added strength, better finishing and low cost manufacturing flexibility. The fire rated doors are made from two panels “sandwiched” together. An optional interior layer (e.g., fire resistant material, lead sheeting, steel or Kevlar) can be added between the door panels for various purposes. Splines, stiles or sticks are inserted in longitudinal channels in the door panels to provide assistance in aligning the door panels and greater hardware holding strength. An intumescent banding material concealed by a banding material around the perimeter of the door seals the door within its frame during a fire. The door design and the automated manufacturing process provide greater design choice, reduced cost and faster fabrication.

Abstract: A wood chipper knife holder assembly for a power driven rotor head has at least one opening in its wood confronting surface for the knife holder assembly which includes a mount block. A counter-knife receiving surface opposite the wood confronting surface of the rotor head is provided on the mount block for a counter-knife and a reversible knife blade with cutting surfaces along opposite transverse edges is received on the counter-knife. A clamp plate secures to clamp the knife in a projecting cutting position. The counter-knife has at least one pair of spaced apart pin openings and the knife blade has at least one pair of complemental pin openings, and pins are received in the knife blade openings and counter-knife pin openings to permit 180.degree. relocation of the knife.

Abstract: A blade guide for a dual-frame wood chip sorter comprising a plurality of fingers having a slot therethrough to receive therein a blade, first and second mounting plates on each frame mounting thereon the bottom of a respective number of the fingers. At least one blade on the first frame is disposed intermediate adjacent fingers attached to a first mounting plate with each finger holding an intermediate blade being on another first mounting plate that is longitudinally separated from the other first plate on the frame. The pattern repeats for the second mounting plates with blades from the second frame.

Abstract: A horizontal comminuting machine for reducing recyclable waste wood and other comminutable material which may have non-reducible foreign objects incorporated with it has a generally horizontal rotary drum mounting a plurality of peripherally spaced communinuting tools traveling in a continuous work contacting path. A feed works delivers material forwardly to the rotating drum in a longitudinal feed stream and to a lead anvil which, under undue operating pressure, withdraws from an operative position adjacent the path of the tools to a removed position. An anvil confining assembly on the machine frame controls the travel of the anvil. Rearwardly of the lead anvil, individual anvils are mounted to cooperate with the tools to further reduce the material.

Abstract: Flail apparatus for debarking/delimbing wood products traveling through a debarking station wherein at least one of the flails comprises an axially extending member having axially rotatable chain supporting elements with an array of flexible flailing chains. At least one of the flailing chains incorporates a first, radially extending link, received on one of the elements, which is not radially removable from the element. The flailing chain further incorporates a link structure configured to be radially non-removably attached to the first link. The first link and link structure are configured to permit the link structure to be removable from the first link and a replacement to be received thereon when the link structure is positioned angularly to the said radial direction of extent of the first link.

Abstract: A tensioning member for a blade screen that permits simultaneous tensioning of a plurality of blades in a blade screen, such as for wood chip sorting. The blades may be provided with a sawtooth detail on a bottom edge to reduce the build-up of wood ribbons or fines that would otherwise occur. An elastomeric joint is also provided which allows a dual-frame blade screen to be assembled, while compensating for any phase angle error between eccentric shafts provided to agitate the wood chips by moving the screens.

Abstract: A comminuting machine for waste wood and other waste comminutable material has a vehicle frame and a conveyor in the form of a tub or bed for receiving material to be comminuted. A comminuting assembly has a shaft with a series of rotors with flat radially extending side walls fixed in an angularly offset continuous helical array from one end to the other on the shaft. Comminuting members presenting blunt material shattering beads are releasably secured on the arm mounting surfaces.

Abstract: A tensioning member for a blade screen that permits simultaneous tensioning of a plurality of blades in a blade screen, such as for wood chip sorting, is shown. The blade screen tensioning member includes a hinged bracket that may be supported on a portion of a frame, a spring steel blade holder for engaging a press-snap inserted into a hole in each of the engaged blades, and an elastic stop nut and stud for tightening and tensioning the blades. The blades are held in place at the opposite end of the frame by a similar holder, which, however, is fixed rather than hinged. The spring steel blade holder is reinforced for additional strength, and is bent at an approximately 45 degree angle where the press-snap is engaged. The blades themselves may also be provided with a sawtooth detail on a bottom edge to reduce the build-up of wood ribbons or fines that would otherwise occur. A sliding bearing with a dovetail configuration is also provided.

Abstract: A flail drum system has an upper rotary chain flail drum and a lower rotary chain flail drum longitudinally downstream from the upper drum. Wood product advancing mechanism on the machine frame moves the logs forwardly while spreading them and creates a downward pressure on the products at a first pinch point. The upper and lower flail drums are each driven in rotation about a generally horizontal axis transverse to the path of the log. There is a vertically fixed log support member longitudinally between the upper and lower flail drums and driven means for engaging and advancing the logs is provided on a vertically movable subframe which mounts the upper flail drum, longitudinally between the flail drums, for creating a downward pressure on the logs passing between the upper and lower flail drums and preventing raising and diving movement of the logs passing between the drums.

Abstract: An improved circular saw blade is rotatable in a guard casing having tree receiving vertically aligned openings in its upper and lower plates. The blade has a peripheral surface formed in part by a series of replaceable circumferentially spaced teeth with transverse cutting edges positioned to rotate about a predetermined first radius. The blade also has a series of circumferentially spaced, generally radially projecting backer tooth mounts for receiving the rear surfaces of the teeth. The mounts have sloped peripheral surfaces lying radially inside the first radius of rotation and have rear surfaces generally parallel to the mount front surfaces. The saw further has generally tangentially projecting finger-like guides in a guide region spaced circumferentially forwardly from each tooth to provide a radially extending chip passing slot between each tooth and guide and the guides have peripheral surfaces positioned to rotate radially inside the first arc of rotation about a second arc of rotation.

Abstract: A self-propelled compost windrow turning and aerating machine includes a longitudinally extending vehicle main frame supported on a pair of front wheels and a rear castered wheel. An upper longitudinally extending subframe is swingably supported from the rear end of the main frame to raise and lower the front end of the subframe relative to the main frame. A blower housing mounted on the subframe has a material admitting opening leading to a rotary fan provided in the housing, the blower housing having a discharge opening with a spout for directing material blown out of the housing. Material debridging and feeding mechanism supported on the subframe in advance of the blower housing removes material from a compost windrow and delivers it to the material admitting opening, and an engine drive system powers the front wheels, the fan, and the material debridging and feeding mechanism.

Abstract: A brush/wood chipper having a small diameter pressing feed cylinder adjacent and parallel to an anvil which is generally perpendicular to the feed disc, the cylinder also being adjacent the chipping disc. This feed cylinder is in an infeed chute, and presses the branches, twigs or other wood against the anvil while the wood is fed to and chipped by knives on the disc. The radially oriented knives are each canted relative to the chordal anvil so that, preferably assisted by a canted feed cylinder, the wood is forced toward the center of the chipping disc. The infeed chute has a wall generally at the center of the disc. The chips are propelled to a flow arrester for discharge into bags or bypassed to a discharge chute extension, using a control valve at the flow arrester.

Abstract: A debarker knife assembly is disclosed including a plurality of disks rotatably and drivingly carried on a shaft. The disks have cutting teeth on their circumferences and are co-rotated on the shaft to remove the bark from a log as the log advances and rotates past the rotating debarker knife assembly. The disks are interchangeable and readily assembled or disassembled for repair or replacement. The cutting teeth are provided with replaceable, reversible cutting inserts fixed to the leading faces of the teeth.

Abstract: A chipper knife assembly for a stump disintegrator is disclosed in which knife holder bodies radially span across pockets or openings formed in a rotating chipper disk. A reversible and replaceable blade insert with a plurality of selectable carbide edges is carried on the leading face of the holder body and fixed thereon by means of a threaded fastener inserted from the trailing face of the holder body through a hole formed between the trailing face and the leading face. The end of the fastener engages a threaded recess in the blade insert. The chipper knife assembly divides the chipper disk opening into a leading opening through which wood chips and other debris may pass for subsequent discharge and a leading opening which provides clearance and access to the threaded fastener for its removal and installation.