Abstract: A woodworking machine capable of simultaneously making a number of cuts through stock material and shaping opposed edges simultaneously to form a plurality of pieces finished on all sides. The woodworking machine includes feeding means capable of feeding stock material into and through a cutting zone, first and second arbors disposed in the cutting zone to either side of the feed path of the stock material, each of the arbors being provided with a plurality of saws and shapers aligned with corresponding saws and shapers on the other arbor to saw individual pieces from the stock material and to shape opposed edges. The feed means is driven by a reversible variable speed hydraulic motor and is capable of feeding the stock through the cutting zone at varying speeds. An improved dust collection apparatus is also disclosed herein.

Abstract: A ring assembly includes two side-by-side flat ring members of uniform rectangular cross-section each being split, with the confronting split ends having radially overlapping fingers to define a circumferentially sealing joint. The ring members are dimensioned to be received in a common piston groove with the ring members being non-rotatably coupled so that the joint of one member will always be rotationally spaced from the joint of the other to define an axial seal for the ring assembly. A non-rotational coupling is provided by an integral tab formed in one member and projecting transversely therefrom and received in a mating transverse recess in the other member, with the recess having a larger dimension than the tab to permit sliding movement of the ring members relative to each other within the groove. Two forms of tabs include a partially sheared and bent tab and a partially displaced shear plug.

Abstract: A tree-cutting device for lumbering machines comprises a holder structure capable of being brought into contact with a tree to be felled, a swingable chain saw operable to saw only partially through the trunk of said tree, and a movable sharp-edged cutting blade operable to subsequently cut off the remainder of the tree trunk left by the chain saw. In order to assure most favorable operating conditions and minimize damage to the wood in the root end of the tree trunk, the chain saw is pivotally mounted in a sheltering structure forming a swingable gripping arm operable to press the tree trunk against a rigid part of the holder structure, while the cutting blade is projectable along a straight path in a plane forming an oblique angle to the plane of swing of the chain saw from a sheltered inoperative position within said rigid part of the holder structure.

Abstract: In a glassmaking process, a pair of reciprocating blades are used to cut a stream of molten glass into discrete charges known as "gobs". The cutting surfaces of the shear blades are maintained in a spaced-apart relationship by pairs of raised portions or rails formed in or on the facing blade surfaces. The raised portions or rails of the blades keep the blades separated a specified distance and thereby extend the wear life of the blades by eliminating friction between the cutting surfaces of the blades. A solid film lubricant is applied to the blades and serves to lubricate both cutting surfaces of the blades, thus the blade surfaces that contact the molten glass stream are lubricated to avoid the possibility of the glass sticking to the shear blades.

Abstract: A method and apparatus for cutting cylinders of gelatinous material such as polyacrylamide gels into discs of precise thickness comprises a cutting surface which is placed in contact with the entire circumference of the cylinder. Cutting force is then applied from all points on the circumference at once, resulting in cutting the gel cylinder towards the center from all points on the circumference. This is accomplished by the use of a multi-bladed diaphragm similar to an iris diaphragm used for camera aperture control. The edges of the blades of the diaphragm form a variable dimension cutting surface.

Abstract: A sheet of magnetic material is placed over a surface of a malleable carrier and stuck with a multi-projectioned punch. Each projection of the punch removes a wafer of the magnetic material from the sheet of magnetic material, and embeds the wafer into the carrier to form a pattern of magnetic material wafers in the surface of the carrier. The carrier is then positioned, wafer bearing side down, over an adhesive coated surface of a substrate, and a surface of the carrier, opposite from the wafer bearing surface, is struck with a multiprojectioned punch to force with each projection an individual one of the wafers out of the surface of the carrier and into the adhesive on the substrate. The malleable carrier is then peeled from the adhesive coated surface of the substrate and from the wafers secured thereto, to leave on the surface of the substrate the pattern of magnetic material wafers.