Cutting – Cutting motion of tool has component in direction of moving... – Orbital motion of cutting blade
Patent
1988-05-26
1990-03-27
Phan, Hien H.
Cutting
Cutting motion of tool has component in direction of moving...
Orbital motion of cutting blade
83284, 83344, 83672, 83699, B26D 140
Patent
active
049110470
ABSTRACT:
A synchronous rotary cross-cutter is disclosed with two oppositely rotated, axially parallel cutting rotors that support cooperating, helically extending knife blades with cutting edges situated in a cylindrical envelope. The axes of these cutting edges run at an angle, corresponding to the inclination of the helix, with respect to the direction of advancement of the material web being cut. To accommodate different cutting lengths without the need for a controllable irregular drive for this purpose, the axial distance of the cutting rotors from the material web is variable and the knives are mounted on a flat blade holder that runs substantially tangentially in the rotor cross section and is slightly flexible. The knife blade holder, supported by a series of individually adjustable supporting elements, can be given a slight flexure with a radial adjustment, so as to assure that the position of the cutting edge of the knife remains within in the cylindrical envelope. Preferably, the supporting elements consist of supporting shanks which can be clamped in a beam-like hub body of the cutting rotor and which alternate with screw spindles that form the adjusting means.
REFERENCES:
patent: 1304034 (1919-05-01), Edwards
patent: 1910387 (1933-05-01), Hahn
patent: 1965523 (1934-07-01), MacFarren
patent: 3247746 (1966-04-01), Nystrand
patent: 3606811 (1971-09-01), Hallden
Fuchs Bernd
Hornung Hans
Voltz Eduard
Milde Jr. Karl F.
Phan Hien H.
Valmet-Strecker GmbH
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