Abstract: A method of manufacturing a saw blade includes providing a coil stock, setting a first portion of the coil stock in a first direction, setting a second portion of the coil stock in a second direction opposite the first direction, and forming a plurality of cutting teeth in the first portion and the second portion of the coil stock after the first and second portions are set.

Abstract: Toe clamps generally shaped like hollow cylinder sectors or ring segments, methods of manufacturing such toe clamps, a toe clamping arrangement including such toe clamps, and a fixture for use in manufacturing such toe clamps.

Abstract: A metallic card wire has an elongated rib portion and teeth. The teeth have a front segment, a top segment and a back segment. The front segment has the connection of the tooth from the elongated rib portion and the front segment including a tip which is actively taking fibres in carding. The top segment has at least one hunch after the tip in the direction of the back segment. If more than one hunch is present the first hunch is the hunch positioned closest to the tip; if only one hunch is present this hunch is the first hunch. The back segment forms the connection of the top segment towards the elongated rib portion and the front segment of the next tooth.

Abstract: Batch casting of rim sprockets for chain saws as particularly applied to larger rim sprockets experience undesired high scrap rate resulting from porosity and chip-out. The solution is to ensure flow of molten steel throughout solidification of the molten steel in the sprocket mold while retaining molten steel portals or gates of a size that permits breakaway of portal stems. Such enhances the cooling rate of the molten steel in the sprocket mold which was found beneficial. The objective of reduced scrap rate is thus accomplished by maintaining a ratio of mass to surface area of the sprockets being cast to no greater than about 4 grams of material to each square inch of surface area and alternatively provide through bores through the rim sprockets which additionally assist in wood chip removal. This design also reduces the material content which reduces the cost and weight of the product.

Abstract: In the manufacture of a link plate for a silent chain, a band of sheet steel is intermittently forwarded to string of punching dies and shaving dies. The band tends to follow a slightly curved path, which causes alignment errors in a conventional punching and shaving operation. However, in this case, each shaving die and its corresponding punching die are disposed in symmetrical relationship with respect to an intermediate position along the path of movement of the band, and the intermediate position coincides with the location at which the deviation of the band. As a result, the shaving dies are more accurately aligned with the punched surfaces produced by the corresponding punching dies.

Abstract: Toothed cutting blades are made by forming spaced slots in an edge of a blade preform (20) to leave lands (8) between leading and trailing walls (4, 6) defining the slots, the leading walls (4) having a rake angle greater than that required in the finished blade, and the lands having aligned top surfaces between the slots, and then applying bending forces to the lands (8) so as to reduce the rake angle of the front walls to that desired and incline the top surfaces to form positively raked teeth with inclined back surfaces (32). The lands may be bent by tools inserted in the slots, or by compressing their material between punches applied adjacent their front walls.

Abstract: This invention concerns a saw blade (S) including at least one part with fine teeth (6) and at least one part with grouped teeth (7). The part of the blade with grouped teeth (7) includes a number of groups (4) of, for example, V-shaped indentations (10) in the blade (S), each pair of indentations defining a saw tooth (1). Each group (4) comprises an even number of indentations. In an arbitrary group (e.g. indentations one, three, five, etc.) a first imaginary line A), drawn between alternate tips (11) or base, is a straight line which forms a small angle (a) in relation to the longitudinal direction of the saw blade, the tips or bases being evenly distributed along the line. The invention also concerns a method and a device for producing a saw blade with grouped teeth by means of a tool comprising a punch and a punch die. The punch for cutting out the saw teeth is completely symmetrical and has substantially V-shaped tips. A saw blade blank is fed through the tool and cut in at least two stages.

Abstract: A saw blade has a plurality of teeth with each tooth formed by a beveled leading face, a beveled trailing face and a chamfered surface located on the trailing face of each tooth. The trailing and leading faces are beveled in opposite directions in alternate order throughout the saw blade prior to the forming of the chamfered surface. The beveled leading face of each tooth intersects the chamfered surface on the trailing face of each tooth to form a curved cutting edge having a negative rake angle. The beveled faces are manufactured by first forming a plurality of rough-formed gullets. The rough-formed gullets are then finished-formed into beveled gullets by a cold-forming operation prior to the grinding of the chamfered surface to form the curved cutting face of the tooth.

Abstract: A master die set and unit die system for use with a punch press, the master die set adapted to receive, align, clamp and release unit dies of standard dimensions so that unit dies may be quickly changed in the master die set while the master die set is operably installed in a punch press. The upper shoe of the master die set includes a sliding dovetail to align and clamp a punch holder plate of standard dimensions, the sliding dovetail operated by a single clamping screw. The opposed bottom shoe of the master die set includes a recessed pocket and clamps to align and clamp a unit die blank of standard dimensions in registry with the punch holder plate. The master die set is attached to the punch press by bearings so that the entire die set can rotate with respect to the punch press to cut saw teeth having the same tooth length, but different gullet depths, with the same die.

Abstract: Metallic wire card clothing is provided having a sharpened leading edge on each of the longitudinally aligned teeth formed in a metallic strip by an apparatus which includes a punch. During punching, the relative direction of travel of the punch is illustrated as inclined at an acute angle in relation to the moving strip and a die cooperating therewith. The method contemplates thus inclining the strip and while the strip is so inclined, punching the teeth as the strip is continuously fed past the die. The strip may be inclined in respect to the direction of travel of the punch either transversely or longitudinally, preferably, both.

Abstract: A carrier takes up a gin saw blade blank from a magazine stack, swings the blank to position over a collet chuck on a continuously rotating vertical spindle, and places the blade on the chuck. The chuck is actuated to clamp the blade thereto and the chuck is shifted laterally to move the blade into cutting engagement with a cutter wheel having peripherally spaced teeth. The chuck drive includes a yieldable mechanism to permit intermittent stopping of the blade as the cutter teeth pass through. After the cutting cycle, the chuck is again moved laterally to the load-unload position; and an ejector removes the blade from the chuck, after release by the chuck, and carries it to a storage spindle for finished blades. During the cutting cycle, the carrier is moved back to its position over the magazine to pick up a succeeding blank for deposit on the chuck. Apparatus functions are performed by air cylinder motors controlled by a bank of air valves operated by cams on a common cam shaft.