Abstract: A woodworking planer having a main frame, a carriage slidingly mounted on the main frame to provide alternating longitudinal movement, a workpiece locking device also provided on the main frame for releasingly securing a workpiece in a fixed position relative to the longitudinal movement of the carriage, and cutting members provided on the carriage to plane four longitudinal sides of the workpiece simultaneously. The cutting members include horizontal cutter heads simultaneously moveable vertically towards and away from each other, and vertical cutter heads individually moveable horizontally towards and away from each other in response to predetermined shapes of a copying model co-acting with copying parts connected to the vertical cutter heads. The copying parts include spring biased rollers for following the predetermined shapes of the copying model. A feeder arrangement receives the workpieces for individually feeding the workpieces one at a time to the workpiece locking device.

Abstract: A carrier (12) is laterally displaceable on the feed table (2) of the machine on a track (13) slidable in a track bed (11), the lateral position being adjustable by means of an acutating means (16) connected to a spindle. Lower and upper woodworking units (9, 10), each having a tool spindle (3, 5) supported at both ends and tools (4, 6) disposed thereon, e.g., planers, groovers, and/or profile cutters, are removable together with bearing housings (7) after disengaging securing means (21) and replaceable, e.g., by woodworking units equipped with other tools. The tool spindle (3, 5) is separable from the bearing housings (7) for exchanging the tools (4, 6). For ease in removing and replacing the lower woodworking unit (9), the carrier can be pulled completely out of the machine at one side. For adjusting optimum cutting, the lower woodworking unit can be vertically positioned as regards the overhang of the tools relative to the working surface (1) of the feed table.

Abstract: The head (1) of the planing tool includes a plurality of helical grooves (2) of dovetail cross-section uniformly distributed over its periphery. Wedging devices (6) with knives (5) resting thereon are insertable sideways in the grooves. Disposed in each wedging device is a securing arrangement (7), actuation of which causes the associated wedging device-and-knife assembly to be pressed against the outwardly tapering sidewalls (17, 18) of the respective groove and held fast. Each of the knives has two opposite cutting edges (19, 20), either of which can be brought into operating position by reversing the knife. A second groove (16) runs parallel to each first groove (2) for receiving a guide component of a knife-aligning device. Owing to the helical configuration of the grooves and the precisely aligned cutting edges of the reusable knives disposed in the grooves, vibration-free machining of workpieces with planing widths of up to more than two meters is possible.