Abstract: An automatic yarn cutting mechanism comprises a supporting structure, a scissor device, an electromagnet, and spring means holding the scissor device and electromagnet in their inoperative positions when the electromagnet is de-energized. The scissor device is provided with a post mounted slidably relative to said supporting structure, and the electromagnet comprises a solenoid and a plunger core or piston operatively connected to said post. The supporting structure is provided with a plate-shaped member, said scissor device and electromagnet being mounted on one side of the plate-shaped member, said slidable post and plunger core extending through said plate-shaped member to the other side thereof and being connected on that other side by a traverse connector.
Abstract: A guard casing encloses a substantial portion of the blade of a circular power saw. A cylindrical tube is carried by the casing for connection to a source of vacuum, the cylindrical tube having a slot extending longitudinally from one end thereof for accommodating therein a peripheral segment of the saw blade so that the sawdust produced by the blade is more efficiently collected. The cylindrical tube is adjustably mounted so that its slot can be appropriately positioned relative to the saw blade.
Abstract: An apparatus for withdrawing a continuous band of multi-article skin packages from a skin packing machine includes a clamping device for periodically grasping the band and stepwise withdrawing it from the skin packing machine in a direction of band feed; a first cutter for severing the band parallel to the direction of band feed; and a second cutter for severing the band transversely to the direction of band feed. The two cutters can divide each multi-article skin package into smaller, single-article packages. The apparatus further has a punch for providing hanger holes in the packages simultaneously with the severing operation of the second cutter; a sled carrying the clamping device, the second cutter and the punch back and forth parallel to the direction of band feed. A control intermittently and simultaneously actuates the second cutter and the punch at predeterminable locations when the sled travels against the direction of band feed.
Abstract: A roving cutter with a positive ejection cutting head in which the ejection elements provided in the spaces between the circumferentially spaced cutting blades are mounted in eccentrically rotating end places under axial tension so as to form with the end plates a squirrel cage-like rigid assembly. By placing the ejection elements under lengthwise tension they can be given the required rigidity in spite of being reduced in cross section, for example to take on the form of rods or wires. Because of this, longer cutters become possible and in cutters of conventional length greater clearances can be obtained and thus the build-up of fiber material or dust in the spaces between the blades more effectively avoided.
Abstract: There is disclosed a cutting press adapted for the cutting of paper, such as discarded paper money. The cutting device is mounted in a support having the shape of a case with open side walls, a feeding conveyor passing through the case forwarding the paper to be cut to the press.
Abstract: A method and apparatus is described for feeding grid stock through a punch and die arrangement so that the spaced apart slots are equally spaced during the progression of the grid stock. The feed mechanism for strip stock comprises reciprocating punch means, die means associated with said reciprocating punch means to cooperate to punch out a group of spaced-apart slots in said strip stock, supporting means associated with said punch and die means to support said strip stock during its advance, a pair of members slidably mounted to said supporting means to operate on adjacent groups of spaced-apart slots in said strip stock to positively feed said stock away from said punch and die means, and means timed in respect to the reciprocation of said punch and die means and operative thereby, while said die means is raised from said punch means, to impart feeding movements to said feed stock.
Abstract: The shearing machine comprises a stationary apron and a moving apron carried by lateral upright members and provided with cutting blades, the moving apron being guided at both ends by means of roller devices adapted to cooperate with guide ramps mounted on bottom lateral extensions of the moving apron. The guiding devices are placed substantially at the level of the horizontal cutting plane while another guiding device is located in the bottom portion of the shearing machine. The extensions are adapted to receive and transmit the cutting power developed by jacks mounted on the stationary apron.
Abstract: A pair of interlocked slide fastener stringers having a plurality of sliders respectively on their longitudinally spaced chains of coupling elements fed over a guide table as the sliders are sensed one at a time by a feeler lever pivotally mounted on the guide table. A stop lever pivotable with respect to the guide table has a stop finger that projects into one of element-free spaces between the chains in response to the pivotal movement of the feeler lever due to engagement thereof with the slider. The stop finger, while not actuated, is withdrawn out of the way, and thus does not interfere with the sliders moving with the slide fastener stringers.
Abstract: A punching tool comprises a plurality of knives, which constitute an annular array and are provided with wedge-shaped cutting edges. Each knife is vertically adjustably secured to a vertical knife holder. Adjacent knife holders are detachably interconnected by a projection of one knife holder and a groove, formed in an adjacent knife holder and by a screw, which extends through a bore in the projection and is screwed in a tapped bore at the bottom of the groove.
Abstract: A cutting tool for cutting soft ductile materials such as came (a lead or lead alloy extrusion used for leaded glass) without distortion. A thin steel blade is rapidly accelerated by impulse to cut the same. The blade is accelerated either by an electrical solenoid, a hammer, or other suitable means.
Abstract: Apparatus for delivering ties after unmolding from a first location to a trimming station which includes a conveyor operative between the first location and the trimming station, a gantry having a pair of arms for grasping the ends of the tie, lifting the tie from the first location, rotating the tie and delivering it to said conveyor.
Abstract: Apparatus usable in slicing food. The apparatus includes a cutting board, and a pair of laterally spaced side walls having formed therein a pair of laterally spaced guide slots for guiding a cutting blade in a planar region which extends to the surface of the cutting board and is perpendicular thereto. A support member having a pair of opposed parallel planar faces is mountable on the board in either of two orientations wherein one or the other of the faces confronts the planar region and is spaced therefrom a distance which is different in each orientation. A brace supportable on the board at an inclined position engages one side of a food article to be sliced, to clamp the same between the brace and the selected face of the support member.
Abstract: An improved apparatus for cutting material such as filamentary tows into predetermined lengths comprising (a) a cutting assembly including a plurality of spaced apart knife edges secured to a mounting member at equal radial distances from a point on said mounting member thereby forming a reel, each of said radial distances in every instance being less than the distance from said point to the periphery of said mounting member; (b) said cutting assembly having means adapted to receive successive wrappings of material to be cut in contact with a plurality of said knife edges so that no relative movement occurs between said material and said knife edges longitudinally of said material; and (c) means for forcing said material between adjacent knife edges thereby severing said material into lengths of controlled dimensions, wherein the improvement comprises: means for preventing at least most of said knives from moving in a direction longitudinal of said knife edges.
Abstract: A die stamping device for cutting, scoring or creasing a pattern of shapes onto laminar material, comprises a die cylinder having a solid cylindrical core with a coating of setting material such as plastics in which are fitted cutting or scoring blades the radially outer surfaces of which define the pattern to be cut or creased onto laminar material passed in sheet or web form between the die cylinder and a smooth pressure cylinder, which may be provided with cooperating elements, such as resilient blocks or engraved recesses to cooperate with the scoring or creasing blades; the die cylinder is made by a process involving forming a pattern on the outer surface of the coating by photographic techniques, and then removing the coating from the solid cylindrical core to facilitate cutting out the openings to receive the blades.
Abstract: A guard for moving-blade cutting instruments, for instance band-saws and band-knives. The guard is in the form of a comb or other toothed member, mounted alongside the blade and vibrated cyclically so that the tips of the teeth lie proud of the cutting edge at least once per cycle. The clearances between the teeth are aligned so as to facilitate access of piles of cloth or the like to the blade, but the bulkier fingers of the operator should be struck by the tips of the vibrating comb and repelled before being seriously cut, or cut at all, by the blade. The guard may be mounted to yield within limits, so as to increase the exposure of the blade, when subjected to sustained pressure from approaching work.
August 31, 1979
Date of Patent:
February 3, 1981
National Research Development Corporation
Abstract: An improved method and apparatus for cutting segments from a continuously moving stock piece are disclosed wherein a cut-off press is accelerated to exceed the speed of the stock piece and to substantially eliminate a pushing force by the stock against a positive engagement means. The force of acceleration is reduced and controlled to maintain a minimum bias in the direction of the stock movement by the positive engagement means when the cut-off press attains a velocity equivalent to the moving stock piece. The stock piece is severed into accurate length segments during reciprocal movement cycles of the cut-off press. Back pressure on the stock piece is substantially eliminated by establishing a positive pulling engagement between the cut-off press and the stock piece when moving in the same direction during the reciprocal movement cycles.
Abstract: An electric food slicer includes a cutter rotated by an electric motor. The motor is housed in a motor housing removably received in the main body, so that the motor is not actuated unless the motor housing is in the main body. A support for supporting a slice plate thereon is removably attached to the main body and is rotatable when not in use into an inoperative position in close proximity to the main body without being disconnected therefrom. A food clamp is removably supported on the slice plate. All these parts of the slicer can be held together in a compact shape around the main body for the storage or packing of the slicer. An electric cord connected to the motor can be held in a compact shape in the slice plate support. All the parts including the main body, except the motor housing, can be easily detached from one another and washed in a usual way to keep the machine in a sanitary condition.
Abstract: A supporting assembly providing lateral support for the nib of a punch in a power press having a stripper plate to prevent breaking of the punch when punching thick workpieces. The bushing which conducts the nib of the punch through the stripper plate has a coaxial annular recess in its underside. An annular insert of resilient polymeric material, preferably polyurethane plastic, completely fills the recess and presents an inwardly-directed collar surface substantially aligned with the opening in the bushing. The insert is dimensioned to project downwardly a short distance beyond the punch bushing to provide an exposed striking surface for engaging the workpiece as the ram descends. The reaction force of the springs on the stripper plate is sufficient to volumetrically deform the insert causing the inwardly directed collar surface to crowd against the nib of the punch, thereby providing enhanced lateral support for the punch as the punch penetrates the workpiece.
Abstract: The present invention relates to a sheet cutting apparatus comprising a body; a lower blade provided with a cutting edge and supported on the body; an upper blade provided with a cutting edge and mounted on the body by connecting means so as to be scissorwise movable with respect to the lower blade; as well as support means supported adjacent to the cutting edge of the lower blade below the upper blade. The support means comprises a support plate mounted upon the support means by means of at least three pre-stressed springs fitted along the support means. The springs may be pre-stressed between support plate and support means by means of pull rods. The support means is preferably provided with a power unit for moving the support means upwards and downwards.