A feeding device includes a plurality of driving modules, a plurality of feeding modules and a plurality of couplers. Each driving module has a driving shaft pivotally mounted on a housing and driven by a power module to be rotated about an axis. Each feeding module includes a pivoting shaft substantially coaxial with the driving shaft, a suspending unit journalled on the pivoting shaft to be pivotable and having a bearing portion which is disposed to be biased downwardly by a spring member, a driven shaft mounted rotatably on the bearing portion, and a feeding roller driven by the driven shaft. Each coupler includes a transmitting shaft having two ends connected to the driving shaft and driven shaft by universal joints, respectively.

A feed roller assembly of a harvester head of a forestry machine includes a pivoted arm operated by a hydraulic cylinder and a feed roller and one operating device attached to the pivoted arm having an attachment hub driving the feed roller, the feed roller includes at least one attachment flange, at least two toothed discs, spacer pieces between at least the attachment flange and the toothed discs, attachment bolts connecting the attachment flange, the toothed discs, and the spacer pieces to form the feed roller as a bolted construction, and a cleaning comb attached to the arm for cleaning gaps formed between each pair of components when the feed roller is rotating.

A feed roller assembly of a harvester head of a forestry machine includes a pivoted arm operated by a hydraulic cylinder and a feed roller and one operating device attached to the pivoted arm having an attachment hub driving the feed roller, the feed roller includes at least one attachment flange, at least two toothed discs, spacer pieces between at least the attachment flange and the toothed discs, attachment bolts connecting the attachment flange, the toothed discs, and the spacer pieces to form the feed roller as a bolted construction, and a cleaning comb attached to the arm for cleaning gaps formed between each pair of components when the feed roller is rotating.

An apparatus for processing logs includes a conveyor for conveying a log in the apparatus, a chipping canter, which comprises two chipping head assemblies for chipping the opposite sides of a log, and a saw, which comprises at least two circular blades for sawing the log on at least one side. The chipping head assemblies are installed on different shafts than the circular blades. The circular blades of a saw are situated before the chipping canter in the conveying direction of a log and are arranged to, before chipping, partly or completely saw off from the log the parts of the log that are to be chipped with the chipping head assemblies.

An apparatus for processing logs includes a conveyor for conveying a log in the apparatus, a chipping canter, which comprises two chipping head assemblies for chipping the opposite sides of a log, and a saw, which comprises at least two circular blades for sawing the log on at least one side. The chipping head assemblies are installed on different shafts than the circular blades. The circular blades of a saw are situated before the chipping canter in the conveying direction of a log and are arranged to, before chipping, partly or completely saw off from the log the parts of the log that are to be chipped with the chipping head assemblies.

A power carpentry feeder machine includes a power source; a rotary wheel operatively coupled to the power source; horizontal guide rods horizontally coupled to the power source; a horizontal movement unit including two movable blocks having horizontal guide holes to receive the horizontal guide rods therein, locking members attached to the movable blocks, a connection block interposed between the two movable blocks and including vertical guide holes, and jointing members jointing the movable blocks to the connection block; a mounting base including a base board and vertical guide rods vertically coupled to the base board and extending through the vertical guide holes; and a vertical movement unit including springs encompassing the vertical guide rods to set the connection block under the springs and a clamp block having clamping holes to receive the vertical guide rods to extend therethrough so as to set the clamp block on the springs.

An apparatus for processing logs includes a conveyor for conveying a log in the apparatus, a chipping canter, which comprises two chipping head assemblies for chipping the opposite sides of a log, and a saw, which comprises at least two circular blades for sawing the log on at least one side. The chipping head assemblies are installed on different shafts than the circular blades. The circular blades of a saw are situated before the chipping canter in the conveying direction of a log and are arranged to, before chipping, partly or completely saw off from the log the parts of the log that are to be chipped with the chipping head assemblies.

An apparatus for processing logs includes a conveyor for conveying a log in the apparatus, a chipping canter, which comprises two chipping head assemblies for chipping the opposite sides of a log, and a saw, which comprises at least two circular blades for sawing the log on at least one side. The chipping head assemblies are installed on different shafts than the circular blades. The circular blades of a saw are situated before the chipping canter in the conveying direction of a log and are arranged to, before chipping, partly or completely saw off from the log the parts of the log that are to be chipped with the chipping head assemblies.

A power carpentry feeder machine includes a power source; a rotary wheel operatively coupled to the power source; horizontal guide rods horizontally coupled to the power source; a horizontal movement unit including two movable blocks having horizontal guide holes to receive the horizontal guide rods therein, locking members attached to the movable blocks, a connection block interposed between the two movable blocks and including vertical guide holes, and jointing members jointing the movable blocks to the connection block; a mounting base including a base board and vertical guide rods vertically coupled to the base board and extending through the vertical guide holes; and a vertical movement unit including springs encompassing the vertical guide rods to set the connection block under the springs and a clamp block having clamping holes to receive the vertical guide rods to extend therethrough so as to set the clamp block on the springs.

A feed roller assembly of a harvester head of a forestry machine includes a pivoted arm operated by a hydraulic cylinder and a feed roller and one operating device attached to the pivoted arm having an attachment hub driving the feed roller, the feed roller includes at least one attachment flange, at least two toothed discs, spacer pieces between at least the attachment flange and the toothed discs, attachment bolts connecting the attachment flange, the toothed discs, and the spacer pieces to form the feed roller as a bolted construction, and a cleaning comb attached to the arm for cleaning gaps formed between each pair of components when the feed roller is rotating.