Abstract: As shearing blades of a first jaw portion, a shearing machines includes: a tip blade; a pair of first parallel shearing blades bent at an obtuse angle to the biting direction of the tip blade and disposed both sides of the blade width; and a pair of second parallel shearing blades bent at an obtuse angle to an attaching portion of the first parallel shearing blades and disposed on both sides of the blade width. As a tip blade, the shearing machine includes: a point blade a pair of tip tapered blades disposed on both sides of an end portion and whose blade width is increased toward the rear end; and a pair of tapered blades bent at an obtuse angle to an attaching portion of the rear end portion of the tip tapered blades and disposed toward the first parallel shearing blades.

Abstract: A method of manufacturing a part having a beveled edge with a serration formed in the beveled edge. The method includes positioning a part between a first die piece and a second die piece; and moving the first die piece relative to the second die piece. The movement results in both shearing a portion of the part to create the beveled edge, and serrating the beveled edge to create the serration.

Abstract: A method and apparatus are provided for reducing or eliminating sliver formation during aluminum sheet trimming operations. A resilient support pad is used in the trimming apparatus to substantially eliminate the formation of slivers which damage the surface finish of the part. Use of the resilient support pad also significantly reduces burr heights and improves trimmed edge quality. The method and apparatus are particularly useful for trimming aluminum autobody sheet.

Abstract: A cutting die head assembly for nibbler tools which enables the die head to be independently rotatably manipulated by the user's hand independent of its axial connection with the die body to provide for angular and/or circular cuts in areas of limited space use and thus avoiding the necessity of moving the nibbler body and attached drill in a similar path.

Abstract: A punch includes a jig having four punching regions, each punching region having a pattern hole and a concave embossment; guide columns extended upward from a border of the punching regions on the jig; a base for fixing the jig; a punching member punching and embossing the rectangular corner of a sheet member with vertically moving against the jig by guidance of the guide columns; and an elastic body to elastically bias the punching member upward.

Abstract: An improved corner cutting structure, having a knife seat and a base pivotally connected to the knife seat. The knife seat has an inwardly recessed notch and a receiving slot formed on a periphery. The receiving slot provides the support of a blade. The base has a supporting platform and a cutting board. The cutting board and the blade of the knife seat are correspondingly installed with each other, and the supporting platform is placed underneath the notch. Thereby, when a card is disposed on the supporting platform, the knife seat is pressed rotating to move the blade downward, so as to cut the corner of the card.

Abstract: A cutting device has a body, a driving device, a moving base, a head and a cutting rod. The driving device is mounted on the body to actuate the moving base to move relative to the body. The head extends from the body and has a central hole defined through the head. A notch and an exhaust hole are defined in the bottom of the head and communicate with the central hole. The cutting rod is moveably received in the central hole in the head and is attached to the moving base. The cutting rod has a cutting recess defined around the cutting rod. Accordingly, the metal waste generated during the cutting process is kept from flying about and injuring the user, so the safety of using the cutting device is improved. In addition, the cut metal sheet can be kept from shake or vibration.

Abstract: A cutting device has a body, a driving device, a moving base, a head and a cutting rod. The driving device is mounted on the body to actuate the moving base to move relative to the body. The head extends from the body and has a central hole defined through the head. A notch and an exhaust hole are defined in the bottom of the head and communicate with the central hole. The cutting rod is moveably received in the central hole in the head and is attached to the moving base. The cutting rod has a cutting recess defined around the cutting rod. Accordingly, the metal waste generated during the cutting process is kept from flying about and injuring the user, so the safety of using the cutting device is improved. In addition, the cut metal sheet can be kept from shake or vibration.

Abstract: Notches are cut in a “Z”-section closure to be installed across seams on a standing seam metal roof by means of a tool which punches holes in the central web of the closure. The lower flange of the closure is subsequently cut manually to finish the notch. The tool's die surfaces correspond in shape to that of the closure, and the punch and die are aligned so that the elongate hole they make in the central web extends to the bottom of the web.

Abstract: An apparatus for cutting notches in the ends of metal or plastic pipes and tubes, the apparatus being a bantam twin pipe notcher, comprising a base plate with alignment pins for mounting to a press; the base plate further including two vertical parallel die holders wherein a spring-loaded punch holder with a cutting tool and die blocks are mounted therebetween. The opposite ends of the cutting tool has cutting ends of different radii or shapes for notching two different size pipes or tubes without interchanging the tool and die combination.

Abstract: A notching apparatus to be used in a tube cutting machine comprising a notching arm having a notching blade holder at the end thereof, a clamping plate and a notching blade having an irregularly shaped peripheral edge comprising three recesses and a cutting edge on the inside of each recess. The notching blade holder has two pins extending outwardly thereof for insertion through two of the three recesses of the notching blade in order to hold the notching blade firmly in place. A plurality of fasteners secure the clamping plate to the notching blade holder with the notching blade resting in a cutout portion of the clamping plate and held securely against rotation by the two pins.

Abstract: An office guillotine, for making tabs on documents or intercalated sheets, includes a knife-blade articulated on a frame and having a curved opposite end to cut strips of a length smaller than that of the sheet thus creating a tab. The length of these strips is determined by the position of the sheet with respect to the knife-blade and correct positioning of the sheet is facilitated by a marking system. The markers include holes disposed on different lines each corresponding to a series of tabs. Pins are inserted successively in the different holes of any one line to achieve the corresponding series of tabs.

Abstract: A notch cutter provides a first pair of inwardly facing shear edges in a V. A second pair of outwardly facing shear edges make an almost complementary V with a slightly smaller convergence angle. One pair of shear edges is caused to contact respective ones of the other pair along contact points moving from the entrance of the notch to the apex of the notch. One pair of shear edges is resiliently mounted relative to the other. When used to separate strips and form the ends of the separated strips, the V's of the first and second edge pairs may be truncated since the shear edges need only be wider than the strips on which they act to form their separating and edge shaping functions.

Abstract: In a follow-up slotting tool for continuously punching workpiece (W) fed between a punch (3) and a die unit (5) at a predetermined pitch, the punch (3) is formed with a shear angle (.alpha.) at a lower end surface thereof in such a way that a front end of the punch is cut into the workpiece but a rear end thereof is not cut into the workpiece when lowered at a predetermined downward stroke; and the die unit (5) is provided with a counter member (15) for raising a residue (W.sub.A) partially cut away from the workpiece, after the punch has been lowered at the predetermined downward stroke, and with a cutting edge (21) for cutting off the partially cutaway residue (W.sub.A) raised by the counter member in cooperation with the punch, when the punch is lowered at the succeeding predetermined downward stroke.

Abstract: So-called "retrofitting" of old style fluorescent lighting fixtures is carried out in a punch and die press provided with a special punch and die assembly having guide blocks positioned laterally of the punch and die for receiving pre-existing notches flanking the unnotched portion of the notched edge margin of a so-called "trougher raceway" strip portion of the old fluorescent lighting feature to be retrofitted, the punch of which assembly has cutting edges configurated for piercing the metal work strip backwardly of the notched edge thereof and at the ends of a longitudinal cut to be made and at the back ends of mutually spaced lateral end cuts to be made and for executing severing stokes along such cutting edges and thereby cutting out and removing a slug of metal exactly conforming in shape and dimension to the pre-existing guide notches.

Abstract: A fabric notch cutter includes a pair of inwardly facing shear edges which converge to a first apex and a pair of outwardly facing shear edges which converge to a second apex at a slightly lesser angle than the convergence angle of the inwardly facing shear edges. Each of the outwardly facing shear edges contacts a respective one of the inwardly facing shear edges at a contact point. Further, the outwardly facing shear edges are resiliently mounted such that they are retracted toward their support member during a cutting operation. The points of contact between the shear edges progress toward the apices during the cutting operation.

Abstract: A punching arrangement has a guide assembly for guiding movement of a second die at an acute angle relative to a first die in order to punch an aperture at an acute angle in a flange of a track shoes. A positioning device moves the track shoe to a preselected location relative to the first die in response to movement of the second die toward the first die. A holding apparatus engages the track shoe and clamps the track shoe to the first die in response to further movement of the second die toward the first die. A crank mechanism breaks the second die away from binding engagement with the track shoe after punching and enables the second die to return to the initial position. The punching arrangement is particularly suited for use in a punching press.

Abstract: An anvil cylinder is severed along an axial direction of a shaft into a plurality of ring-shaped sections, and elastic bodies are fixedly secured to parts of outer circumferential surfaces of the severed anvil cylinder sections over the entire length of the cylinder. In addition, the respective anvil cylinder sections are adapted to be individually engaged with or disengaged from a knife with the aid of a rotary object. By adjusting the positions of the anvil cylinder sections, slitting slots can be formed by machining only at the portions where slitting slots are necessitated.

Abstract: An apparatus for cutting each of a plurality of multi-tabbed shingles into smaller portions useful as roof-cap is disclosed and claimed. The apparatus includes upper and lower cutting plates mounted in reciprocating opposed spacial relationship. Preferably, the apparatus is pneumatically powered and it is possible to cut multiple shingles in a single operation.

Abstract: A cutoff system for exterior siding which includes a flying punch and shear. The system includes a main carriage which is adapted to reciprocate and, in one direction of travel, move at the same speed as the siding to be cut. A pair of punches are then actuated to form the hanger and butt notches at the lateral edges of the siding. Upon withdrawal of the punches, the travel of the main cylinder is slowed such that the siding travels away from the punching area. Upon sensing the notched areas, the main carriage is again moved to travel at the same speed as the siding. The speed is timed such that the center of the notches is located below a shear. This shear is then actuated to form a single parting line across the siding. The carriage is then retracted to await the next cycle of the system. As such, with each cycle of the system, the notches are formed in the trailing and leading edges of adjacent panel segments, and the leading panel segment cut from the continuous siding.

Abstract: A method and apparatus for notching a wire so that it can be severed at the notched location by applying an axial force thereto. The apparatus includes a linearly reciprocal mechanism adapted to move forwardly, placing a pair of cutting blades in straddling relationship with the wire and includes an actuating mechanism for laterally reciprocating the cutting blades to form notches in opposite sides of the wire before retracting the cutting blades from the straddling relationship with the wire. The method of the invention includes the steps of moving a pair of cutting blades into straddling relationship with a wire, reciprocally moving the cutting blades into and out of cutting engagement with the wire and subsequently retracting the cutting blades from the straddling relationship with the wire.

Abstract: Punch and die combinations are disclosed for trimming the edges of strip material. The die openings and the punches have trapezoidal cross-sections so that they form trapezoidal notches in the edge of the strip and produce trapezoidal or, in one instance, parallelogram-shaped, slugs. By virtue of the fact that the die openings and punches have a trapezoidal cross-section, the slugs produced when the edge of the strip is trimmed are pushed into the die openings and passageways extending from the die openings and stacked in an orderly manner so that close packing of the slugs with resulting jamming does not take place.

Abstract: A key-cutting device includes a holder which holds the key blank. The holder is movable between initial and cutting positions. When the holder is in a cutting position, a cutter is moved to cut one or more notches in the key blank. An actuator is connected with the base to move the holder from the initial position to the cutting position. The actuator includes an improved saddle assembly in which a leaf spring is connected with a force transmitting member. A body of polymeric material is disposed between the leaf spring and the force transmitting member. Force is applied to a free end of the leaf spring to move the holder from the initial position to the cutting position. Upon continued operation of the actuator, the leaf spring is deflected about a fulcrum which is at least partially formed by the body of polymeric material. As the leaf spring is deflected, the body of polymeric material is resiliently compressed.

Abstract: Two shearing blades disposed along two lines which intersect each other are carried on the bottom edges of two adjacent walls of a four-sided ram structure. The ram is supported at four points whereby to provide greater stability. The workpiece is carried on the aligned top surfaces of a fixed bed and a movable carriage. The movable carriage is movable in a first direction. Finger grippers, joined by a connecting bar, are movable in slots along the top surface of the movable carriage in a second direction. Thus, the workpiece is moved in the first direction by movement of the movable carriage and in the second direction by movement of the finger grippers. The workpiece may be precisely and accurately positioned under the shearing blades making use of sensors in each of the finger grippers and a lateral sensors in each of the finger grippers and a lateral sensor at the end of the movable carriage.

Abstract: A method and tool for forming a contour cut in a tube end by applying a force from within the tube end which is applied against the interior surface of the tube end. The tube includes a punch which engages the interior surface of the tube end and has a cutting edge generally conforming to the shape of the contour cut. Preferably each tube end is provide with mirror image contour cuts.

Abstract: A die press consisting of: a bed on which a workpiece is supported in operating position; a die holder movable between a retracted position and an extended position; a workpiece holder mounted for movement relative to the bed between a holding position and a release position; and cooperating structure on the die holder, bed, and workpiece holder for moving the workpiece holder from its release position to its holding position as an incident of the die holder moving from its retracted position towards its extended position. The workpiece holder in its holding position maintains a workpiece in operating position on the bed.

Abstract: The machine includes a supporting frame for a worktable through which a C-shaped head is vertically movable and is actuated by hydraulic means pivoted on the lower face of the worktable and is guided by a pair of vertical cylindrical and parallel columns, fixed to the worktable, and by a shaped slider arranged below the worktable, the upper wing of the head supporting two blades directed towards the worktable and mounted on two respective first upper sectors which both rotate scissors-like about a vertical axis, the worktable having horizontal lower counter-blades also supported by two second respective lower sectors which rotate about the vertical axis, there being means for connecting the first upper sectors and the second lower sectors during rotation and means for positioning and locking them once their position is reached, the head being furthermore controlled by adjustable elastic elements for adjusting the maximum value of force applicable to the first upper blades according to the thickness and to the

Abstract: The present invention relates to a shearing machine in which the upper shearing blade can be easily adjusted and positioned. The upper blade is held on a pivotal plate member which is pivotally held on a ram by means of a hinge means to be rotated to adjust of the position of the upper blades. In addition, a hold down member is provided for holding a work-sheet. The hold down member is arranged to be urged by a toggle joint to hold the work-sheet at a reduced speed with an increased force after coming into contact with the work-sheet. A scrap removal member is also included in the shearing machine such that scraps can be easily removed without mingling them with the finished sheets. The scrap removal member removes scrap without idle time between feeding the work-sheets to be sheared. The shearing machine is so arranged that scraps are taken away directly to a scrap box as soon as the work-sheet has been completely sheared into its finished product.

Abstract: A high-precision punch and die method wherein a pair of pneumostatic bearings are mounted on a rigid frame structure in registered spaced-apart relation to each other, each bearing having a plurality of journal segments provided with a pneumostatic bearing surface and adjustably mounted on the frame structure. A segmented die is mounted on the frame structure in registered spaced-apart relation to (and preferably between) the two bearings, the die having a plurality of die segments provided with a cutting edge and adjustably mounted on the frame structure. The bearing journal segments and the die segments are adjusted, by use of a mating set-up bar, to achieve required sizing and alignment of the bearings and die. A punch is then positioned in the bearings for guided movement through the die, the punch having an integral pneumostatic bearing surface closely facing each journal-segment bearing surface and a cutting edge adapted to coact with each die-segment cutting edge.

Abstract: A high-precision punch and die apparatus having a stationary frame; a punch movable relative to the frame, the punch including integral pneumostatic bearing surfaces and at least one cutting edge; and a die adjustably mounted to the frame to receive the punch therethrough, the die including at least one cutting edge coactable with the cutting edge(s) on the punch. A pair of pneumostatic bearings are provided to constrain and guide movement of the punch through the die, each bearing having a segmented journal that includes a plurality of journal segments formed with a pneumostatic bearing surface, the journal segments being adjustably mounted, relative to the frame, to receive the punch therebetween so that the bearing surface on each journal segment is in closely spaced relation to an opposing one of the bearing surfaces on the punch.

Abstract: A pocket size punch mechanism is provided to punch openings in cards or card-like objects, the punched openings have a cross-sectional configuration and spacing matching the configuration and spacing of a pair of rails in a commonly available card file.Also shown is mounting structure for adapting cards and card-like objects for mounting in the same type of two rail card file. A plurality of mounting members of a stiff stock material are fabricated on a sheet, the mounting members being individually removable from the sheet as needed to form a member having openings conforming to the configuration of the card file rails. A portion of the mounting member has adhesive thereon to secure to the back of the item to be mounted.

Abstract: The present invention is directed to a shearing machine which is provided with two pairs of upper and lower blades in a manner such that the upper and lower blades of one pair are connected to the upper and lower blades, respectively, of the other pair at right angles to shear right-angled blanks out of sheet-like workpieces. The two upper blades are connected with each other at a right angle on a ram member in a manner such that their shearing edges are originally inclined downward from their intersecting point to their respective free ends. The ram member carrying the upper blades is connected to the machine frame by means of a pivot means which is horizontally disposed higher than the top level of the lower blades. Also, one of the two pairs of upper and lower blades are located outside of the vertical plane of the outer side of the machine frame together with related parts.

Abstract: A list cutting machine for producing mitered frame list members an angular cutter head is used for providing a V-shaped overcutting of a supply frame list by two knives, which abut each other at the middle of the cutter head and project therefrom inclined both rearwardly and downwardly. Practice has shown that the innermost halves of the knives are subjected to wear, much more than the outer halves, but the knives cannot normally be turned for increased durability. However, a lifetime-increasing turning is possible when both of the knives are similarly shaped at both ends and are remounted mutually interchanged.

Abstract: An angle shear for cutting a sheet metal plate in two directions shear comprises a feed table, associated therewith longitudinal and transverse cutting blades guide means, and a rotary device arranged above the feed table. Longitudinal feeding means can be retracted from the work position to a position beneath the table level and are arranged in a transverse row. Transverse feeding means can be arranged at the table level and forms a longitudinal row. Both the longitudinal and transverse feeding means cooperate with side stops, which are arranged and distributed within a plane extending in longitudinal and transverse direction. The angle shear provides for automatic feeding of sheets and stacking at several stations.

Abstract: A corner cutting machine for notching corners out of plate stock located on a work table by means of upper and lower knives arranged at an angle to form a V-shaped cutting edge. Work piece stop and positioning edges are mounted to adjustment heads which are mechanical for remotely controlled motor driven longitudinal movement in converging slots provided in the work table and rotary movement relative to the work table.

Abstract: In a notching machine using a blade assembly of upper and lower knives mounted respectively on a vertically moving ram and a machine table and each comprising two individual blades forming with their cutting edges a coinciding vertex angle which may be changed by turning the blades relative to each other around a vertical axis of rotation that extends in parallel with the ram near the noses of the knives, a third blade component is provided at least for the upper knife for forming its nose portion with a unitary cutting edge that complements the cutting edges of the two other blades of the upper knife for confining its vertex angle.

Abstract: A notcher includes a die having a die bore and a notching cutter received in the die bore. The die bore is connected to a suction device, and the notching cutter is formed with an air hole which opens to the atmospheric air and is communicated with the die bore. Accordingly, notching chips are smoothly discharged.

Abstract: Apparatus for cutting notches in the ends of tubing comprises an upright support and a horizontal base member. The upright support includes a ram guide and leverage mechanism for reciprocating a ram. The ram is provided at its lower terminal end with a cutting die which is initially positioned above the lower edge of the tube to be notched and moves through the tube during notching. The tube is supported on the base by means of an arcuate cradle or tube support, and the base includes adjustable mechanisms and stop means for varying the position of the tube support.

Abstract: In a notching machine an upper knife is attached by an upper set collar to the head of a vertically moving ram for being turnable around an axis of rotation lying near the nose of the upper knife. The upper set collar is connected through a fixed axis parallel to the axis of rotation with a lower set collar for a common turning around the same axis of rotation. The lower set collar being provided for the attachment of a lower knife and serving as an auxiliary table for workpieces to be notched. The two knives have an equal minimum vertex of, for example, 30.degree. so that with a first working stroke of the ram in a first turning position of the upper and lower set collars and their knives, respectively, this minimum vertex may be notched into the workpieces lying on the auxiliary table and afterwards with a second working stroke of the ram this minimum vertex may be enlarged to any desired larger notching angle up to for example around 120.degree. in a second turning position of the knives.

Abstract: A cutting apparatus is described for cutting an opening in beverage cup lids. This is accomplished by providing a housing, with a slot for orienting and maintaining the lid in a proper cutting position. While the lid is properly held, a cutting assembly mounted inside the housing and containing a cutting blade is slid past the slot, excising that portion of the lid exposed therein. When the cut lid is placed on a beverage containing cup, the contents can be consumed directly through the opening produced by this invention.

Abstract: A removable cutting tool insert assembly for shears fed with stock, such as bar stock, and including a ram actuatable upper housing closeable downwardly toward and biased upwardly away from a bolster supportable lower housing in a direction transverse to the stock feed direction, with an upper elongated shearing knife mounted on the upper housing and movable for centering adjustment longitudinally of a lower elongated shearing knife mounted on the lower housing upstream of and movable for clearance adjustment laterally of the upper knife, with a hold down movably mounted on the upper housing adjacent the upper knife and biased downwardly toward the opposite lower knife to a location below the recessed top initial stock engaging cutting edge surface portion of the upper knife, but above the lower edge surface of the upper knife, and with a work support movably mounted on the lower housing adjacent the lower knife and biased upwardly toward the opposite upper knife to a location substantially flush with the rec

Abstract: The invention relates to corner shears for cutting out obtuse-angled to acute-angled corners from sheet metal by means of upper and lower knives (41, 40) which interact with one another in the manner of scissors and which, to form an angular cutting edge, each consists of two knives placed against one another in a V-shaped manner and supported on knife carriers (52, 53, 19,20) pivotable about a vertical axis A, the pivot axis (A) passing respectively through the cutting corner and means being provided for adjusting the angle .alpha. between the cutting edges, each upper-knife carrier (52, 53) being connected positively, without the shear stroke being impeded, to the corresponding lower-knife carrier (19, 20) via an engagement piece (72) fastened to the upper-knife or lower-knife carrier.

Abstract: An improved corner shear machine including a recess which extends toward a ram across a table so that a tool assembly unit comprising a combination of a punch and a die is removably fitted into the recess. The die is firmly included in a die block and the punch is fixedly secured to a punch block, whereas the punch block is vertically displaceable toward or away from the die block with the aid of a pair of symmetrically located guide pins which stand from the latter at the rear part thereof. To allow the punch to resume the original position after completion of a shearing operation a resilient means is arranged in a suitable position in the tool assembly unit, and moreover to prevent a workpiece in the form of a sheet material from being raised up together with the punch after completion of the shearing operation a plurality of symmetrically located resilient means with stopper means fixedly secured to the lower end thereof are suspended from the punch block.

Abstract: A key cutting device (20), for replacement keys, having a key blank support member (30), a lever-actuated shearing punch (25) for the key blank, and a depth-gauging stop (33) for the support member (30); the shearing punch (25) is formed to provide an optional two-step (44, 46) cut on the key with a control stop (49) for limiting the stroke of the punch to one step or two steps, as desired, for creating different cuts on the key blank; a locking device (63) automatically moves into locking position with respect to the yieldably-actuated support member (30) to prevent its displacement when the operating lever (37) is manipulated for the key cutting operation.

Abstract: A notching tool for forming notches in ridge- or hip-capping for roofs, the notches being formed to match the profile of the roofing sheets.The tool has a base with a pair of spaced feet which engage the ribs on the roofing sheets to align the tool. A notching head on the base has a replaceable die and punch pair, one of which is fixed to support the capping while the other is manually or power-operated to provide a shearing-type cutting action between the die and punch to cut the notches. Adjustable guides on the notching head support the capping for angular alignment between the capping and the notching head and for adjustment of the depth of the notch. The notching head may be pivotally and/or rotatably mounted on the base and the die and punch may be reversible.

Abstract: This invention provides a collar making apparatus having an integral notcher capable of forming a flat sheet of metal into a cylindrical collar. The notcher includes a stationary die and a ram mounted for reciprocation which includes a punch that cooperates with the die to stamp a notch in the sheet. The notcher further aligns a sheet to be punched and a control automatically operates the ram when a sheet is in the proper position for punching. From the notched sheet, the apparatus forms a channel along one side edge, forms the sheet into a circular configuration, and crimps the other side edge of the sheet.

Abstract: The present invention relates to a notching machine which comprises a frame, a table mounted on the frame, a device for holding shearing tools on the table, a ram member vertically movably mounted on the frame, an upper shearing tool provided with the ram member, and a lower shearing tool cooperating with the upper shearing tool. The lower shearing tool is divided into a plurality of pieces. The notching machine also comprises a screw arrangement for adjustably holding the lower shearing tool in the device for holding the shearing tools. The adjustable holding of the lower shearing tool is done in such a manner that the horizontal clearance between the upper and lower shearing tools may be changed in lateral, forward and backward directions independently.

Abstract: A pipe notching tool to produce a notch extending longitudinally of the pipe from an end thereof, the tool including two members pivotally interconnected, one member having a slotted die part and the other member having a blade which can be inserted in the die part as a result of relative pivotal motion between the members. The blade has a curved cutting edge which produces a continuing shear as the blade is inserted into the die so as to reduce the amount of effort required to complete the notching operation.

Abstract: A tubing notcher which comprises a housing having a longitudinally slidable cutter assembly attached thereto. The cutter assembly is to be manually moved through an appropriate actuation means connected to the cutter assembly. The cutter assembly includes a cutter which has an arcuate cutting edge. A tube, the open end of which is to be notched, is to be located upon a guide means which is fixedly secured to the housing. The guide means is inclined slightly less than a right angle in respect to the longitudinal axis of movement of the cutter. The cutter is to be located within the open end of the tube and upon movement of the cutter the open end of the tube is appropriately notched.

Abstract: To eliminate the noisy milling machines for cutting grooves in articulation pieces of innersoles, a machine is provided which comprises a series of pairs of forwarding rollers, one of the rollers of the first few pairs of rollers has a double knife formed on at least a part of its circumference so that a piece passing between such a pair has two longitudinal cuts formed thereon which are to become the side walls of the groove; a transverse skinning knife is pivotally mounted so as to be moveable into and out of the path of this piece as it passes a subsequent pair of rollers, this knife has the width of the groove and is pivoted into the path of the piece to remove the material between the longitudinal cuts. Preferably, a bracket device is associated with the skinning knife to maintain the straight path of the piece as the skinning knife works on it.