Abstract: The present invention relates to a rotary cutting apparatus for cutting a web of material, including a cutting unit rotatably mounted on a support, a rotary cutter rotatably disposed in the cutting unit, the rotary cutter having a longitudinal axis, and at least one cutting edge disposed on the rotary cutter, wherein the at least one cutting edge is orientated at an angle to the longitudinal axis of the cutter. The cutting unit being counter orientated to the feed direction of the web by an adjustable angle equal to the cutting edge angle, less than the cutting edge angle or greater than the cutting edge angle.
Abstract: An improved device for forming box joining flaps in a box splitting machine comprises a supporting frame for supporting a joining flap cutting assembly, the supporting frame being transversely driven with respect to the paperboard material feeding direction, by a worm screw in turn driven by a geared motor unit controlled by a controlling electronic apparatus.
Abstract: The invention is an apparatus for cutting metal sheet having two rotatable drums, wherein the metal sheet passes between the drums for cutting. Each of the drums has a cutting blade moved into and out of cutting position by an axial actuator rod. The cutting blade includes two sets of rollers bearing against one of a pair of profiled side surfaces of the axial actuator rod.
March 8, 2000
Date of Patent:
October 2, 2001
Kvaerner Technology & Research Limited
Simon Schofield, John Berry, Brian Cooper
Abstract: Continuously rotating shears (10) to shear to size metallic strip fed continuously at up to around 20 meters per second and having a thickness of from 0.5 mm to 5 mm and a width of from 500 mm up to at least 1500 mm, comprising two blade-bearing drums (11, 111), the drums (11, 111) being supported at the ends by rotary cams (13, 113) governed by shearing command means (15, 16), the drums (11, 111) being positioned between the sides (18) of the frame (17) and being made to rotate by an external source of motion, each drum (11, 111) including an external gear (20, 120) cooperating with an inner toothing (26, 126) of a rotary tube (21, 121) which has an outer toothed wheel (25, 125), the two rotary tubes (21) being connected by the respective outer toothed wheels (25, 125) engaging together.
Abstract: Apparatus and method for indexing sheets cut from a web including a production line having an unwind at one end and a backstop at the other end, a printer and a rotary knife between the ends, the relation of the knife speed to the web speed being changed cyclically to develop longer and shorter sheets.
Abstract: Herein disclosed is a cutting device for use in a tag printer or the like, in which a tag web being fed is cut, while its cut position is continuously corrected by a rotary blade so that it can cut a variety of price tag webs having different cutting pitches or intervals. The rotary blade is rotated continuously through a differential gear mechanism by a first motor. Its cutting timing is suitably corrected by a second motor which is connected to the differential gear mechanism. Before the cutting operation, moreover, both the price tag web and the rotary blade are positioned at their respective reference positions. During cutting, information as to the positions of the tags on the web and the rotary blade are fed to a processor which adjusts the rotation of the blade for effecting cutting at the proper positions along the web.
Abstract: Apparatus for subdividing a running paper web into sections of desired length has a first motor which drives the web at a constant speed and a D.C. motor which drives an orbiting knife at a speed which varies during each angular movement of the knife through 360 degrees. A detector which monitors the speed of the web transmits signals which are utilized to insure that the speed of the knife matches the speed of the web during that stage of each orbital movement when the knife cuts the web. The length of intervals between successive cutting operations is adjustable by connecting the knife with any one of several graduated disks whose graduations are monitored by a second detector which controls the speed of the knife during intervals between successive cutting operations.
Abstract: An improved rotary shearing apparatus for cutting a rapidly moving body including rotatable blades which may be inserted into a cutting position and withdrawn therefrom, positioning means for inserting or withdrawing the blades into or out of cutting position, and automatic switches and circuitry capable of causing insertion of the blades and their withdrawal within one rotation of the blades, so that the blades will sever the rapidly moving body with a single clean cut and without disturbing its rapid movement.
Abstract: An apparatus for producing a continuous succession of pieces or sheets, particularly suitable for infeeding cut pieces of wrapping material to wrapping machines, comprises a track for collating and sending forward the said sheets or cuttings; a plurality of auxiliary tracks leading to the said collation track; means for channelling along the auxiliary tracks, successively, wrapping material from respective reels; and control means for rhythmically cutting such material and for automatically feeding material, end to end, from a fresh reel on exhaustion of an empty reel.