Abstract: A rotary shaper tool for use in conjunction with a power tool used to rotate the shaper tool in which a cutter panel is formed about a cylindrical framework. The cutter panel is formed with rows or sets of cutter teeth and an array of vent holes. Chips formed by the engagement of the spinning cutter panel with a wooden workpiece pass to the interior of the shaper tool and are ejected from the vent holes remote from the area of engagement.

Abstract: An insulation board suitable for use as a roof insulating board has a density between about 8 and about 15 pounds per cubic foot; a MOR/density ratio of at least 10.5 to 1 and includes, by dry weight, between about 45% and about 76% expanded perlite; between about 15% and about 45% cellulosic fibers; between about 0.1% and about 10% latex binder; between about 2% and about 9% bituminous material; and about 0% to about 3% alum.

Abstract: A sealing plug includes a plug and a housing the plug and the housing including co-operating means whereby they may be secured together, the plug including two circumferentially extending grooves within which O ring seals are located, and the housing including an aperture within which the plug is adapted to be located, the housing also including a spring loaded radially extending pin which projects into the aperture and which is adapted to project into either of the grooves within the plug if an O ring is omitted, thus preventing the plug being secured with the housing by the co-operating means.