Abstract: A method for encapsulating a cellulose based substrate with polymeric film involves raising the temperature of the respective films using an electromagnetic radiation source and providing a pressure differential between an environment defined between the films and an environment external to the films so that conformance of the films to the cellulose based substrates is promoted. The cellulose based substrate is entirely encapsulated by the plastic films and the films are sealed around the peripheral edges of the cellulose based substrate as well as edges that are defined by slots and cutouts.

Abstract: A method for encapsulating a cellulose based substrate with polymeric film involves raising the temperature of the respective films using an electromagnetic radiation source and providing a pressure differential between an environment defined between the films and an environment external to the films so that conformance of the films to the cellulose based substrates is promoted. The cellulose based substrate is entirely encapsulated by the plastic films and the films are sealed around the peripheral edges of the cellulose based substrate as well as edges that are defined by slots and cutouts.

Abstract: A system for estimating a velocity of a stress wave induced in a log or tree stem is used to maximize the value of wood products produced. An accelerometer is placed against the log while the log is struck with a pneumatic hammer. By monitoring the signals received at the accelerometer, the velocity of stress wave can be determined. Based on the velocity, an estimate of the modulus of elasticity (MOE) for the wood in the log is made. A price table is selected that relates different sizes of lumber having the determined modulus of elasticity to a current market value. The log is then cut such that the value of the lumber produced is maximized.

Abstract: Apparatus for selectively sorting pulp wood chips in accordance with a predetermined maximum thickness includes a plurality of disk members disposed in a plurality of separately rotatable rows, with each row having a plurality of the members disposed in spaced parallel vertical planes, and with members in adjacent rows intermeshing with equal spaces therebetween. Each disk member has a radially contoured outer periphery with the depth of the contour being sufficiently shallow to prevent chips of thickness greater than the predetermined maximum from passing between its outer peripheral edge and an opposing spacer mounted between disk members on an adjacent row. All the rows of disk members are driven in the same direction, but adjacent disks are preferably driven at different peripheral speeds.

Abstract: In a rotary screen for sorting wood or other particles of a desired size from other particles such as fine, moist, sticky sawdust particles, a plurality of balls are suspended beneath the screening surfaces in a manner such that the gyratory motion of the rotary screen imparts a resonant, pendulum-type motion to the balls, causing them to strike the bottom of the screening surfaces and loosen particles from the screen which would tend to clog the openings therein. The rotary screen includes a collection tray or "dust pan" to catch undersize particles, and a plurality of balls are also suspended beneath the bottom surface of the dust pan to strike it and prevent material build up in the dust pan.