Abstract: A saw blade includes a body and a plurality of cutting teeth formed on the body. Each cutting tooth includes a tip at a first end of the cutting tooth, a rake face extending from the tip toward the body, a relief face extending from the tip toward a second end of the cutting tooth and sloping toward the body, and a projection at the second end of the cutting tooth and sloping away from the body. The saw blade also includes a plurality of gullets formed on the body between the plurality of cutting teeth. Each gullet forms an undercut portion between the body and the projection of each cutting tooth.

Abstract: A saw blade (10) comprises a generally circular blade base body (100), and a plurality of teeth (101a, 101b), extending radially from the base body (100). The teeth (101a, 101b) are alternatingly set towards opposing axial (A) directions of the saw blade, such that each tooth presents a respective tooth plane, which is angled relative to a base body plane. The teeth (101a, 101b) present a respective first cutting edge (102a, 102b), extending along a radially distal edge portion (103) of the respective tooth, along a length of the tooth, as seen in a direction of rotation of the saw blade. The radially distal edge portion (103) presents a first bevel (104), providing a first bevel surface (105) which is non-perpendicular relative to the tooth plane. The radially distal edge portion (103) presents, at a radially outermost portion thereof, a hard portion (106) having greater hardness than the base body (100). The saw blade can be used in a brush cutter.

Abstract: A plastic knife is provided comprising a handle, a blade, and a cutting edge. The blade may include a first surface and an opposite second surface, and integrally formed with and extending longitudinally from the handle. The cutting edge may be formed along one edge of the blade, the cutting edge comprising: (a) a first plurality of teeth integrally connected to and extending from the first surface, each tooth in the first plurality of teeth separated by a first concave groove; and (b) a second plurality of teeth integrally connected to and extending from the second surface, each tooth in the second plurality of teeth separated by a second concave groove. The first plurality of teeth and the second plurality of teeth may be integrally formed together while teeth in the first plurality of teeth and teeth in the second plurality of teeth are offset by a distance.

Abstract: A cutting blade for a hand-guided trimmer with a drive motor has a disk-shaped base member with cutting teeth disposed about a circumference of the base member. The base member has a first face and a second face opposite the first face. The cutting teeth each have a tooth face edge, the tooth face edge leading in driving direction of the cutting blade and extending radially, and a tooth back edge extending in the circumferential direction. The tooth face edge and the tooth back edge of the cutting teeth are alternatingly ground on the first face or the second face in the circumferential direction and define together a common cutting tip that is leading in the drive direction. Several of the cutting tips of the cutting teeth that are sequentially arranged in the circumferential direction are positioned in a common plane.

Abstract: A reciprocating saw blade includes a body formed from a piece of coil stock. The body has a shank end configured to secure the blade with a reciprocating saw, a plunging end configured to enter a workpiece, and a cutting edge and opposite back edge extending between the shank end and the plunging end. The cutting edge has a plurality of teeth arranged in a pattern that includes left and right set teeth. A plurality of gullets is disposed between adjacent teeth. Each of the teeth and the gullets has substantially the same size, except that the first and third consecutive teeth immediately adjacent the plunging end have been flattened to be unset, and at least a portion of the second consecutive tooth has been removed to form an enlarged gullet between the first and third teeth.

Abstract: A circular saw blade includes a substantially circular body having a plurality of protruding tip support regions spaced around the periphery thereof, each tip support region including at least a seat for supporting a cutting tip. The tip support region may further include a substantially planar upper tooth face, a grindable tip reinforcement portion and/or a lower tip angle less than 90 degrees. A cutting tip is secured to the seat of each tip support region preferably with a top face of each cutting tip substantially parallel to and offset from an upper tooth face of each tip support region. Each cutting tip of the circular saw blade is further configured to maintain a cutting edge at a substantially constant width when material is removed from the top face thereof. A method of manufacturing a saw blade is also provided.

Abstract: There is provided a reciprocating saw blade having a tapered tang stem. The tang has a tang portion with at least three outer edges and a stem portion with at least three outer edges. The profiles of the tang portion and particularly the stem portion are such that they facilitate the effective and efficient engagement of the saw blade with any of numerous different keyed or keyless chucks of reciprocating saws. The tang/stem profile also advantageously provides for increased strength for resisting failure and/or fatigue stemming from a cutting force applied to the saw blade during use.

Abstract: To realize a method of manufacturing an electro-optical device, which is capable of completely dividing a plurality of substrates used for the electro-optical device along division lines, in a method of manufacturing the electro-optical device, two or more substrates used for electro-optical devices, which are adhered to each other, are divided along division lines. The method includes adhering, a first substrate and a second substrate, on whose one surface a plurality of grooves or a groove is formed in a predetermined width along a division line, to each other on the surface of the second substrate where the plurality of grooves or the one groove is formed and dividing generated cracks in the other surface of the first substrate, which is opposite to the surface adhered to the second substrate, along the division line to divide the first substrate and the second substrate that are adhered to each other.

Abstract: The saw blade (1) includes an elongated body (2) having a longitudinal edge and defining a plane of main extension (6). A plurality of protrusions (4) each is located in the region of the longitudinal edge and each includes a seat (12). A plurality of form bodies (5) each is made of hard cutting material, has a cross section (15) and is connected to one of the seats (12). Each cross section (15) of the form bodies (5) in the plane of main extension (6) at a side facing the respective seat (5) is limited by a line (16) in the form of a circular arc, and at a side facing away from the respective seat (5) it is limited by a front line (17) of a surface (18). The line (16) in the form of a circular arc and the front line (17) enclose a wedge angle (22) which is less than approximately 90 degrees, and they are designed and arranged to form a free angle (23). A plurality of cutting portions (10) each extends approximately transverse with respect to the plane of main extension (6).

Abstract: A saw blade has a plurality of teeth with each tooth formed by a beveled gullet forming a trailing face, a beveled gullet forming a leading face and a planar surface forming a curved cutting face. The gullets forming the trailing face and the leading face are beveled in opposite directions. The planar surface is generally parallel to the beveled trailing face. The unique tooth profile provides a saw tooth having a positive rake angle to significantly improve the strength of the tooth. The method of manufacturing of the unique tooth profile begins by orienting a saw blade blank about three axes and performing a first grinding operation which forms every other tooth gullet and every other planar surface. The partially formed blank is then oriented about two of the three axes in an opposite direction and a second grinding operation is performed. The second grinding operation grinds the remaining gullets and planar surfaces.

Abstract: A saw blade 1 comprises a preceding tooth 5 constructed by a straight tooth performing no saw setting operation in left-hand and right-hand directions and a succeeding tooth 7 for cutting a cutting groove formed by the above preceding tooth 5 to enlarge and open the cutting groove in width. The succeeding tooth 7 has left-hand and right-hand set teeth 7L, 7R bent in the left-hand and right-hand directions by splitting an approximately central portion 7D of a tooth edge on a tooth line in its thickness direction; and the clearance between end tip insides of the above left-hand and right-hand set teeth 7L, 7R is smaller than the thickness of the preceding tooth 5. Further, the thickness of portions of the left-hand and right-hand set teeth 7L, 7R near their end tip portions are approximately equal to the thickness of portions of the left-hand and right-hand set teeth near respective base portions thereof.

Abstract: A variable pitch band saw is provided which has a toothed edge comprising a plurality of recurrent groups of teeth. Each group includes an unset leading tooth and a plurality of teeth that are alternately set laterally to opposite sides of the saw. Each tooth has a cutting edge disposed in a predetermined cutting plane and an accumulated pitch distance between it and the next preceding saw tooth having a cutting edge coplanar with said predetermined plane. The size of gullet area of each tooth is made directly proportional to the accumulated pitch distance of that tooth so that the size of the gullet areas are the same for all teeth having the same accumulated pitch. Each of the tooth groups may include teeth of varying height and degrees of lateral set, some of the teeth of each group having a different pitch, measured from the tip of one of said teeth to the tip of a tooth adjacent the one, to avoid uniform tooth spacing between all the teeth to the group.

Abstract: A reciprocating saw blade moved in opposite directions parallel to a longitudinal axis is formed with at least one row of longitudinally succeeding teeth having tips all lying on a common tip line parallel to the longitudinal axis and including even teeth all oriented in one direction parallel to the axis and odd teeth alternating with the even teeth and all oriented in the opposite direction parallel to the axis. Each even tooth forms with one of the adjacent odd teeth a double tooth and the tips of the teeth of each double tooth are set laterally of the blade to one side with the lateral set by an offset that alternates longitudinally from double tooth to double tooth to opposite sides of a center blade plane. The offset is the same for all teeth. Each tooth has a relatively steep leading edge and a relatively shallow trailing edge, relative of course to the respective longitudinal direction.

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 reciprocating saw blade comprises an elongated substantially flat body having a tang end and a distal tip end, a back edge and a spaced apart cutting edge. The cutting edge is formed of first and second pluralities of alternately and oppositely facing slicing teeth which define gullets formed therebetween. The first plurality of the slicing teeth extends from the one end and merges into the second plurality of the slicing teeth which extends to the other end. Each slicing tooth includes a slicing face facing one end, a planing face facing the other end, and a tip including an uppermost planar surface. The tips of the second plurality of teeth are substantially tangent to a first tooth tip tangent line. Each tip surface of the second plurality of teeth lies at a greater angle to the first tip tangent line than the tip surface of the first plurality of teeth. A method of making a reciprocating saw blade in accordance with the present invention is also disclosed.

Abstract: A disk-type cutting tool having a plurality of hardened inserts that are received in recesses formed in the periphery of a base disk. Each insert has a shank portion that is received in the recess and which defines a shoulder that is in abutting engagement with one side of the base disk. This provides a mechanical interlock and location for brazing operation, and also increases the amount of surface area for brazing to provide a more rigid assembly.

Abstract: A high speed hand tool includes a saw disc having less than ten teeth, preferably four. Each tooth has a radial flank, which preferably inclines forward in the cutting direction, and a tangential flank, which has a small clearance angle. The teeth may have a greater thickness than the disc itself which thickness, in that case, diminishes in a direction opposite to the direction of rotation. Alternatively, the teeth may be offset alternately to the right and the left. The invention also comprises an adjustable protective device which enables setting the depth of a perpendicular saw cut.

Abstract: To provide a general-purpose saw blade which will saw different materials cost effectively, the saw blade includes a plurality of sets of teeth, each set including saw tooth having a large relief angle and a small tooth angle which provide fast cutting speeds, and with saw tooth having a small relief angle and a large tooth angle which provide the resistance to chipping.

Abstract: A high performance, moderate cost bandsaw blade has a unique tooth configuration which enables it to provide high performance, while using standard manufacturing processes and available bandsaw equipment. The bandsaw blade has a straight back edge and a repeating tooth pattern wherein each set tooth, of each repeating tooth pattern has a set which is a monotonically increasing function of the height of the tooth. The height of each tooth in the repeating tooth pattern increases from the first tooth of the pattern to the last tooth of the pattern. The height difference between the beginning and end of a tooth pattern is preferably on the order of ten to twenty-five thousandths of an inch, more preferably between fifteen and twenty thousandths of an inch, and the length of a repeating pattern is typically about six inches to match a standard cutter.

Abstract: A new blade, and a method of cutting therewith, having repeating sets of teeth, each set having sub-sets which differ from each other in at least one cutting characteristic including straight teeth, primary cutting teeth which are left-sided and right-sided and secondary cutting teeth which are left-sided and right-sided, said secondary cutting teeth having a large relief angle.

Abstract: A saw blade comprises scratcher teeth which are not set, and shaving teeth which are set. All of the teeth have their leading and trailing lateral edges chamfered. The chamfering of successive teeth occurs at alternate sides of the blade. The scratcher teeth have sharp points, whereas the shaving teeth are truncated to form oblique top surfaces and to render the shaving teeth shorter than the scratcher teeth.

Abstract: A saw blade includes the: (1) provision of a trapezial tooth between every two triangular teeth, the trapezial tooth having two opposite sides which extend towards one another at a top end, a distal bottom end opposite the top end and two opposite trapezial faces; (2) provision of cutting edges by forming two inclined faces which converge from one of the trapezial faces towards the other one of the trapezial faces; (3) provision of a cut at a rear one of the inclined faces which cut forms an inverted "L" shape that extends vertically to a predetermined height from the distal bottom end; and (4) the grinding of the distal bottom end to form a triangular tip face which extends inclinedly from a front section to a rear section of the trapezoid tooth.

Abstract: A saw tooth, of which a number are removably mounted on a tree-felling saw head, includes a body portion having a lead cutter and a trailing primary cutter separated by a throat. The combined lead cutters function to cut a narrow side wall kerf on each side of a larger principal kerf together with corresponding inside corners of the larger kerf. The remainder of the larger kerf is then cut out by the following primary cutters, forming a square cut end. As the cut progresses, the combined primary cutters separate the longitudinal fibers of the tree at the square cut end without double cutting the fibers, thereby improving cutting efficiency and reducing energy requirements in felling a tree.

Abstract: A circular saw blade is divided into a plurality of circumferential sections each including a number of cutting teeth provided along the circumferential edge of the saw blade. Between each pair of teeth, a gullet is formed having a depth in the radial direction of the blade. The distance between each pair of cutting teeth defines a pitch. The depth of the gullets and the pitch of successive teeth of the saw blade is different from one another.

Abstract: A saw blade comprises a support member having at least one edge, and, spaced along that edge, a series of slots in each of which is secured a saw tooth and in which a portion of the tooth is located within the slot and a further portion extends beyond the slot to overlie a portion of a surface of the support member.Part of the slot and a part of the tooth may be sector-shaped, each slot may include an entry portion with side edges and a base edge or edges, and the tip of the sector-shaped part is located centrally of the base edge, the sector-shaped part communicating with the entry portion via an opening in the base edge whose sides are rounded and which are a tight fit with a mating portion of a tooth, the remainder of a tooth fitting into the slot with some clearance.The invention also extends to a tooth for the saw blade, the tooth having a cutting portion and a body portion to locate in said slot.

Abstract: The invention relates to apparatus for cutting a series of spaced-apart continuous linear slits in a sheet of flexible plastics material, for example in the manufacture of an ajustable width blind. In one embodiment the apparatus includes a feed roller for feeding sheeting to be slit to a support means, a plurality of slitting blades movable in a direction transverse to the direction of travel of the sheeting and means for controlling the blades so that they cut to a depth less than the thickness of the material. In a second embodiment the blades are stationary and are adapted to cut in the direction of travel of the material. The blades may be mounted on leaf springs biased towards the material to be cut, means being provided for controlling the biasing force. Alternatively, a stop may be provided to control the depth of cut of the blades.

Abstract: Sawblades for cutting materials containing abrasive grains or fibers with a power saw utilizing two reciprocating sawblades in contact with each other guided by a groove in a guidebar, all teeth on one blade pointing forwards and all teeth on the other blade pointing backwards. The teeth are located with unequal distances chosen so that two teeth on the first blade will not simultaneously be opposite two teeth on the other blade with the same distance as the teeth on the first blade.

Abstract: A saw chain for motor-driven chain saws includes a cutting link which has three mutually adjacent supporting surfaces defining a U-shaped cutout for accommodating a hard metal insert in the form of a cutting plate therein. The support of the insert is provided at only subportions of these supporting surfaces and the remaining subportions provided an adequate spacing so that a solder gap is formed. The hard metal insert placed in this cutout has an adequate service time and does not require special equipment to hold the same during automatic soldering thereof into the cutting link.

Abstract: A saw blade assembly comprises a laminated structure of three side-by-side parallel strips, one two or all of which may have spaced teeth formed along one edge. Where only one strip has teeth, it is sandwiched between the two other strips and the teeth are of triangular shape when seen in plan and are bevelled on both edges to produce pointed tooth tips. Where two strips have teeth, the strips are arranged one on each side of a center strip. Again, the teeth are of triangular shape when seen in side elevation and are contoured to form pointed tips. The roots of the teeth on one strip are spaced laterally from the roots of the teeth on the other strip because of the presence of the center strip. In another form, each strip has teeth along one edge, the assembly thereby providing three parallel, side-by-side rows of teeth. The teeth are of triangular shape when seen in side elevation and are contoured to form pointed tips.

Abstract: A brush cutting blade having a curved slitter type/non-raker type primary cutting tooth and a preceding appendage forming a combination depth gauge and small stem slitter. The primary tooth terminates over the blade body with the cutting edge provided by that curved portion of the tooth between its most lateral point and the point of termination over the blade body. The cutting edge is curved but outwardly directed in a slitter configuration throughout its length. The lateral point of the cutting edge determines the kerf width to prevent binding. The slitter cutting edge of the appendage is hook shaped to cut small willowy-type stems and the appendage has an upper inclined guide edge that guides the larger rigid-type stems into the primary cutting tooth. The uppermost point of this guide edge of the appendage provides a depth gauge for the primary cutting tooth.

Abstract: A circular saw blade (20) includes a circular body (22) with a plurality of equally spaced teeth (32) and a corresponding plurality of gullets (34) formed integrally with and about the periphery of the body. Each alternate tooth (32) of a first set of alternating teeth has mounted thereon a carbide tip (36) with a cutting point (60) on the right side of the blade (20). Each of the remaining teeth (32) form a second set of alternating teeth and has mounted thereon a carbide tip (38) with a cutting point 72 on the left side of the blade (20). Each of the carbide tips (36) and (38) is formed with a converse front face (42), top bevel angle, side clearance angles and a front bevel angle.

Abstract: The present invention relates to a saber saw which comprises a blade having a plurality of teeth. Each tooth has a cutting edge extending from a top to a deep recess and having an inclination angle of 90.degree. to 120.degree.. Each tooth also has a tooth face formed on its side opposite the first-mentioned cutting edge extending from the top to a shallow recess and having a releaf angle of 10.degree. to 45.degree..

Abstract: A circular saw having dual chip cutting action in which all of the saw teeth are of like width and radial height and have similar tooth geometry with the working surface of the leading tooth face disposed at a negative rake angle and having side portions extending outwardly and rearwardly from a central portion at a negative angle to the side faces of the tooth. A single notch is formed in the top face of each tooth and intersects the working surface, and the notch in alternate ones of the saw teeth are disposed at one side of the central plane of the saw body and the notch in the other alternate ones of the saw teeth are disposed at the other side of the central plane of the saw body.

Abstract: A sawblade has teeth of a height corresponding to the thickness of the blade and chip spaces in the interstices between respective teeth opening into both sides of the blade; the bottoms of alternate chip spaces are inclined to opposite sides of the blade whereby the maximum depth of the chip spaces corresponds to a multiple of the height of the teeth.

Abstract: A saw blade is provided with an arrangement and form of teeth which reduces vibration, cutting noise and chatter, and which enhances cutting speed and blade life. In addition to having teeth arranged in recurrent groups wherein the teeth alternately decrease and increase in gullet depth and pitch with the tips of the teeth in alignment and being set laterally to the same extent, the smaller teeth are given a positive rake angle which increases with decrease in tooth size so that the angle of attack of the smaller teeth is sharper thereby causing them to dig in and remove a larger clip, thereby tending to equalize the size of the chips removed by the different teeth.

Abstract: A circular saw blade has block-like tooth tip inserts of hard metal, secured at circumferentially spaced intervals to the peripheral portion of a disc-like blade body having opposite flat side surfaces. The gullet in front of each insert, conventionally present in such a blade, is spanned in the circumferential direction, at least to a substantial extent, by a fixed thin wall, which can comprise a reduced thickness portion of the blade body, so that each gullet is thus defined by a sidewardly and radially outwardly opening cavity in a side surface of the blade, and the blade has a near-circular periphery. At the circumferentially rearward and radially inward portions of each cavity its edges are substantially bevelled to facilitate flow of cuttings out of the cavity.

Abstract: A sharpenable cutting blade with a series of alternately inclined skew-cut notches along its main cutting edge. Each notch defines a pair of auxiliary cutting edges respectively on opposite sides of the main cutting edge and facing in opposite longitudinal directions. Each auxiliary edge resides in and is half-defined by a main edge defining surface so as to be sharpened simultaneously with the main edge.

Abstract: A saw blade is provided with an arrangement and form of teeth which reduces vibration, cutting noise and chatter, and which enhances cutting speed and blade life. In addition to having teeth arranged in recurrent groups wherein the teeth alternately decrease and increase in gullet depth and pitch with the tips of the teeth in alignment and being set laterally to the same extent, the smaller teeth are given a positive rake angle which increases with decrease in tooth size so that the angle of attack of the smaller teeth is sharper thereby causing them to dig in and remove a larger clip, thereby tending to equalize the size of the chips removed by the different teeth.