Forintek Canada Corporation

Canadian Patents & Development Ltd.

Donald C Walser

Michael R Clarke

Gary Ellis Troughton

Thomas A McLauchlan

A system of drying veneer sheets for manufacturing wood products such as plywood, measures the moisture content of the sheets and controls drying to a predetermined moisture content. By drying veneer sheets to the predetermined moisture content, avoids excessive drying to ensure all sheets are below the 11% moisture content level. A process of drying comprises incising a veneer sheet, sensing the moisture content of the incised veneer sheet, steam drying the sheet under pressure and controlling the drying based on the sensed moisture content of the veneer sheet, to dry the sheet to the predetermined moisture content.

Controlled steam drying of veneer sheets

A wood incising roller where the teeth are formed by grooves in the roller surface and where some of such grooves cross others. Each cutting tooth has a knife-like cutting edge of finite length that is in one instance perpendicular to the axis of rotation of the roller and in another instance parallel to such axis. The grooves can be formed by machine cutting, either turning or grinding or by being molded in the surface and then shaped by a grinding operation. At least some grooves preferrably spiral about the roller. The pattern of cutting teeth and shape are determined by such variable parameters as pitch, number of thread starts, angle of cutter, depth of cut and lead angle. An incisor for lumber or veneer consists of two rollers at least one of which is as described in the forgoing. The grooves can be filled or partially filled with an elastic compressible material. The incising roller of the foregoing also is used in combination with a veneer lathe.

Wood tenderizing apparatus and method

A chuck for a veneer lathe is provided, which has a generally wedge-shaped lug with a first, corrugated face, preferably of a stepped configuration. Such a chuck reduces the tendency of a lug to split during processing, and thus reduces chuck spin-out and resultant wastage.

Veneer lathe chuck

A pressure bar of the fixed type for veneer cutting is heated to reduce frictional drag against the wood surface. In the preferred form, the pressure bar is contoured having a tip with a relatively small radius of curvature and a face, in advance of the tip, which has a relatively large radius of curvature. The combination of a heated contoured pressure bar provides performance comparable with that of a roller bar in terms of roughness and friction, but at significantly reduced cost.

Growing community of inventors

Surrey, Canada

Donald C Walser