Abstract: In an apparatus for making plastics carrier bags from a web of tubular film of thermoplastic material, a feeding mechanism intermittently conveys the webs by one bag width and a severing mechanism cuts the web into half tubes along an undulating curve. A carriage displaceable in the machine frame transversely to the feeding direction of the web is reciprocated by a drive derived from a first rotating control cam through gearing. A cutting knife pivotable in the carriage about its longitudinal axis passes through the plane of the tube about an axis perpendicular thereto and is so controlled by an oscillating drive derived from a second rotating control cam that its edge is substantially tangential to the undulating curve at the cutting point. A detour assembly retards one of the half tubes to bring the bag side edge zones into phase and each half tube is formed into bags by a transverse sever-sealing device.

Abstract: An apparatus and method for cutting a web of material having a conveyor carrying and continuously moving a length of the web material, an oscillating means, a cutting arm mounted on the oscillating means and moveable between a position over the web and a position laterally outside of the web in a turn-around area. A nozzle mounted on the cutting arm and connected to a source of high pressure fluid and a fluid jet ejected from the nozzle towards the web and moved by the cutting arm in an oscillating manner along a path between the turn-around area and the position over the web. As the fluid jet oscillates along its path, the movement of the fluid jet in conjunction with the movement of the web results in the cutting out of a section of the web.

Abstract: An apparatus and method for cutting a web of material having a conveyor carrying and continuously moving a length of the web material, an oscillating means, a cutting arm mounted on the oscillating means and moveable between a position over the web and a position laterally outside of the web in a turn-around area. A nozzle mounted on the cutting arm and connected to a source of high pressure fluid and a fluid jet ejected from the nozzle towards the web and moved by the cutting arm in an oscillating manner along a path between the turn-around area and the position over the web. As the fluid jet oscillates along its path, the movement of the fluid jet in conjunction with the movement of the web results in the cutting out of a section of the web.

Abstract: A cutter system for pipe casings and the like, including a generally "C" shaped cutter assembly body having an always open side entry and exit area leading into the centrally located cutter area with an annular trackway extending an exemplary 290.degree. about the operative center of the cutter system. A cutter sub-assembly is carried on the trackway for back and forth movement of an exemplary 110.degree. in each direction with the sub-assembly carrying two, directly opposed rotating cutter blades which cut the pipe casing as the sub-assembly is moved to and from on the trackway. The two blades travel in each direction a minimum of one-half their arcuate spacing difference and preferrably less than their arcuate spacing difference, producing a full 360.degree. cut. The cutters are radially moved in and out by a reciprocating yoke assembly. The cutter body assembly is pivotally mounted onto a telescoping boom attached to for example a work vehicle.

Abstract: A method and device for slitting or edge trimming strip material on a process line are described in which trimming knives 2 mounted on a base 3 which is pivotally mounted on a sub-base 4, trim the edges of strip 14. The lateral position of the strip is sensed by sensors 10 and the position of the strip relative to center line of the process line is determined by a computer (not shown) which controls the lateral movement of the sub-base 4 by a hydraulic jack 9 so as to keep the strip and trimmer in alignment. The speed V of the strip is sensed and the speed V.sub.T of the trimmer is sensed by a transducer 12. The base 3 and thus each pair of knives 2 is pivoted about a pivot 11 on the sub-base 4 so that the angle .alpha. the knives make with the center line of the process, tends to equal tan .sup.31 1 (V.sub.T/V).

Abstract: An apparatus and method for transferring a moving web from one windup core to another windup core comprising a plurality of rotatable core chucks mounted on a revolvable turret, means for leading said web towards said cores, and means for forming and severing a leader strip of web material for subsequent securing to an empty cylindrical windup core.

Abstract: A shake resaw machine for converting a generally rectilinear wooden blank into a pair of oppositely tapered shingles, each having a tip and a butt end, is comprised of a support table hingedly disposed for cooperative engagement with a saw for lateral movement with respect to a longitudinal feed axis along which the wooden blank progresses during a resaw sequence through the saw, including a first tip-cutting stage, an intermediate diagonal-cutting stage, and a second tip-cutting stage, a table control member for moving the support table at a predetermined rate in a lateral path relative to the feed axis during the resaw sequence, first and second blank guide members having variable lateral stiffness, one of each disposed on either side of the feed axis forwardly proximate a saw blade location thereon, for cooperatively routing the blank along a variable, predetermined resaw path, and first and second guide control members for regulating, respectively, the lateral stiffness of the first and second guide membe

Abstract: A handle bag of a predetermined width is made from a synthetic-resin tube. This tube is fed at a predetermined feed speed through a cutting station where it is spanned over a cutting drum formed with an endless circumferentially extending and undulating cutting groove. A blade engages radially inwardly through this groove so that as the tube passes over the drum it is subdivided transversely into a pair of tube halves. The blade reciprocates back and forth transversely of the tube in the cutter groove by rotation of the drum at such a rate as to form on the confronting cut edges of the tube halves interfitting and staggered handle flaps. One of these tube halves is then detoured through a distance equal to an odd whole-number multiple of half of the bag width and then is realigned with the other tube half with the flaps in transverse alignment. The two tube halves are then seamed together simultaneously.

Abstract: An apparatus for cutting and diverting a freshly cast, polymeric web. The apparatus includes a pair of traversing knives that cut a tongue from the middle of a web and an air jet that diverts the continuously advancing tongue and web to waste.

Abstract: A circuit or control arrangement for an adjusting drive of a press ram of a high-speed cutting press which includes top and bottom dies respectively attached to the press ram and a platen of the press with the top die being adapted to dip or penetrate during a cutting process into the bottom die. An arrangement is provided for maintaining the depth of penetration of the upper die means into the lower die means at a constant value in dependence upon an operating condition of the high-speed cutting press. The maintaining arrangement may include at least one limit switch operatively connected with an oscillator stage which provides adjusting signals to the drive motor. In lieu of a limit switch, a cutting force measuring sensor member may be interconnected with an evaluator circuit and the oscillator means so as to control the drive motor.

Abstract: Edge trimming apparatus and method for trimming off wavy edges of strip material, e.g. metal strip, wherein rotary trimming knives for each edge of the strip are movable transversely relative to the advancing strip. The knives are pivotally supported about vertical axis and can have their transverse spacing adjusted, the support blocks preferably being transversely slidable in guides which are mounted on a carriage which itself is transversely movable relative to the advancing strip. Edge sensors are located adjacent edge regions of the strip and signals from the sensors are passed to a device, for example a hydraulic jack, for moving the carriage transversely.

Abstract: Method for removing camber from strip preparatory to forming helical pipe is taught utilizing the steps of feeding the strip longitudinally along a directional line of feed, sensing lateral deviations of the strip relative to the directional line of feed, laterally moving and realigning the strip in response to lateral deviations, then severing both side edges of the strip on lines parallel with the directional line of feed.

Abstract: A cutting means in an apparatus for continuously manufacturing spiral strip piping, fed in unbroken lengths, consisting of an upper, driven knife wheel (4) and a lower, freely rotating, circular, substantially horizontal support roller knife (20). The knives (4,20) are arranged on a table (22), swivellable in relation to the travel of the strip (1) and displaceable perpendicularly to the travel of the strip (1). Before cutting, the angle of the upper knife (4) to the travel of the strip (1) is adjusted, by means of the swivellable table (22), to the desired pipe diameter for providing square pipe ends.

Abstract: A method and a device for cutting out pieces of material webs, the cutting taking place between a spherical surface and a sharp edge. The spherical surface consists of a freely movable, non-driven ball. The ball can be made of hard material such as steel and the cutting edge of softer material, or vice versa. The device consists of a roller over which the web is led and a member acting against it. The roller has a groove corresponding to the desired contours of the formed piece. A ball, guided by the groove made in the roller, presses against the edge of the groove for cutting through the web.

Abstract: A cutting method and apparatus using a plurality of impact-type laser or water jet cutters mounted on a framework above a moving web. The cutters are disposed in a spaced relationship to each other along a line parallel with the direction of web travel. By spacing the cutters a distance substantially equal to the desired product length, each of the cutters simultaneously cut from the web similar portions of one side of each of two consecutive products. The cutters are arranged so that as the web moves one product length, each of said cutters cuts from the web on the other side of a substantially central axis similar portions of the other side of said products. Embodiments include means to increase or decrease velocity of the cutters when mounted on a second framework which is also movable in a direction parallel to the direction of the web movement.

Abstract: Method and apparatus for removing camber from strip preparatory to forming helical pipe is taught utilizing the steps of feeding the strip longitudinally along a directional line of feed, sensing lateral deviations of the strip relative to the directional line of feed, laterally moving and realigning the strip in response to lateral deviations, then severing both side edges of the strip on lines parallel with the directional line of feed.Apparatus for practicing the method comprises a pair of laterally spaced guide rolls which are mounted for lateral adjustment toward and away from the other, means for moving the guide rolls simultaneously as a unit as well as independently of each other, and control means, including servomechanisms for positioning each roll in response to variations in both width of the strip and camber.

Abstract: Continuous cutting of a web, in motion, is effected by passing the web over a roll against which web and roll there is pressed a rotatable circular cutter, at an angle with respect to the longitudinal axis of the roll.

Abstract: The cutter comprises a cutter body having an upper support surface formed with an elongated rectangular opening with inwardly extending rails on the opposite longer sides of the opening and on one end of the opening. An open rectangular support frame is engageable with the rails and has a length less than that of the opening, for reciprocation along the rails, and coil springs, engaged in recesses in one end of the rectangular opening bias the support frame to engage the other end of the opening. An open rectangular blade frame is removably and conformingly seated in the opening of the support frame, and has a plurality of cutting blades extending longitudinally across the opening therein in equispaced substantially parallel relation. A pressing cover is hinged at one end to the cutter body and has a free end provided with an operating handle, and the pressing cover has projections on its inner surface engageable through the spaces between the cutting blades.

Abstract: A method for cutting out work pieces which have similar contours on both sides of an axis of symmetry thereof comprising the steps of scanning the contour of the work piece for developing control signals corresponding to the shape of the work piece, delivering the control signals for driving a plurality of cutting torches placed on a carrier, displacing the carrier in the direction of the axis of symmetry of the work piece representing the y direction of coordinates, and displaying the cutting devices transversely to the axis of symmetry of the work piece representing the x direction of coordinates, said cutting devices being displaced on equal distance along the x direction but opposite in sense, whereby a pattern having a mirror image on both sides of the axis of symmetry can be cut simultaneously by the cutting torches.