Development, design, and construction of a double-density incisor

An extremely closely spaced pattern of incisions is required in order for white spruce and lodgepole pine to be pressure-treated to meet Canadian and U.S. treated lumber standards. By using a synchronized pair of rollers to incise each face of the lumber, the unincised areas between rows of incisions left by the spacer rings on the first roller can be filled with a second pattern of incisions. This allows movable spacer rings to be employed to clean the tooth rings and provides an incision density of almost 12,000 incisions per square meter. Using this incision density on spruce-pine-fir, the areas treated via the individual incisions joined up to provide an envelope of treated wood. Furthermore, by incising the lumber prior to drying, the resulting incisions were barely discernible. A commercial prototype double-density incisor was therefore constructed, incorporating synchronized paired-rollers, extended tooth length, and the clean-ring system. This type of incisor should allow spruce-pine-fir, and white spruce in particular, to be much more widely used for pressure-treated lumber.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member