A glideway crowning plate for creating a crown on a cutting edge of a cutting blade with a sharpening jig including a glideway crowning plate having a concaved curved surface of a predetermined radius placed proximate spaced glides of a sharpening jig. The sharpening jig utilizes a flat sharpening plate or a flat sharpening stone and the sharpening jig is side-stroked on the flat sharpening plate or the flat sharpening stone and the glideway crowning plate imposes a curved path of the predetermined radius on the sharpening jig, the cutting blade, and the flat sharpening plate or the flat sharpening stone to create a crown in the cutting edge of a cutting blade.

The present disclosure presents a grinding apparatus (100) which is suitable for sharpening an edge tool. The grinding apparatus (100) may comprise a grinding apparatus casing (110); a cylindrical grindstone (200) and a support element (300). The cylindrical grindstone (200) is removably attachable to the grinding apparatus casing (110). The support element (300) is also removably attachable to the grinding apparatus casing (110) for supporting the edge tool (400) to be sharpened during the grinding operation. The support element (300) includes an elongated member, which may be embodied as a cylindrical support bar (310). The cylindrical support bar (310) may be configured to extend in a direction (D) which is perpendicular to the rotation axis (R) of the cylindrical grindstone (200), during operation, in such way that a grinding operation is enabled where the edge tool (400) to be sharpened can be sharpened by means of the side surface (210) facing outwardly from the grinding apparatus casing (110) during the grinding operation.

There is provided a sharpening apparatus for a cutterhead assembly. The sharpening apparatus includes a sharpening member. The sharpening apparatus a guide member via which the sharpening member is moveable both longitudinally relative to a cutterhead assembly of the lumber and one or more of tangentially at least in part and radially-inwards at least in part relative to the cutterhead. In addition or alternatively, the sharpening member is moveable along two of the x-axis, y-axis and z-axis.

A spacer may angle the guide member relative to the longitudinal axis of the cutterhead assembly, axis of rotation of the cutterhead assembly and/or longitudinal axis of the blades of the cutterhead assembly. In addition or alternatively, the guide member may be angled relative to the longitudinal axis of the cutterhead assembly, axis of rotation of the cutterhead assembly or longitudinal axis of the blades of the cutterhead assembly.

There is provided a sharpening apparatus for a cutterhead assembly. The sharpening apparatus includes a sharpening member. The sharpening apparatus a guide member via which the sharpening member is moveable both longitudinally relative to a cutterhead assembly of the lumber and one or more of tangentially at least in part and radially-inwards at least in part relative to the cutterhead. In addition or alternatively, the sharpening member is moveable along two of the x-axis, y-axis and z-axis.

A spacer may angle the guide member relative to the longitudinal axis of the cutterhead assembly, axis of rotation of the cutterhead assembly and/or longitudinal axis of the blades of the cutterhead assembly. In addition or alternatively, the guide member may be angled relative to the longitudinal axis of the cutterhead assembly, axis of rotation of the cutterhead assembly or longitudinal axis of the blades of the cutterhead assembly.

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of the cutting edge (20) and is connected with a transducer (R4), which produces an electrical displacement signal (S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The control surfaces are the surfaces that delimit an external groove (40) of a roller (4) that is free to translate along an axis (A4) perpendicular to said plane (X) and spaced from the blade (2) by an amount such that said cutting edge (20) passes in said groove (40).

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of the cutting edge (20) and is connected with a transducer (R4), which produces an electrical displacement signal (S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The control surfaces are the surfaces that delimit an external groove (40) of a roller (4) that is free to translate along an axis (A4) perpendicular to said plane (X) and spaced from the blade (2) by an amount such that said cutting edge (20) passes in said groove (40).

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of said cutting edge (20) and is connected with at least one transducer (R1, R2, R4), which produces an electrical displacement signal (S1, S2; S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S1, S2, S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The processing unit is connected to means (101, 102) for supporting and moving sharpening means (100).

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of said cutting edge (20) and is connected with at least one transducer (R1, R2, R4), which produces an electrical displacement signal (S1, S2; S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S1, S2, S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The processing unit is connected to means (101, 102) for supporting and moving sharpening means (100).

An apparatus for feeding, grinding, and sorting a woodworking knife may include a guide track system with a lugged endless loop for moving woodworking knives along a flow path through a grinding assembly, and optionally to a rotary sorting station. Corresponding systems and methods for feeding, grinding, and sorting a woodworking knife are also disclosed herein.

An apparatus for feeding, grinding, and sorting a woodworking knife may include a guide track system with a lugged endless loop for moving woodworking knives along a flow path through a grinding assembly, and optionally to a rotary sorting station. Corresponding systems and methods for feeding, grinding, and sorting a woodworking knife are also disclosed herein.