Full rotation type, sheet web shearing machine
AssigneeHitachi Metals, Ltd.
InventorsSadaji Tashiro, Yasuyuki Kuroi
Life of this patent
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Abstract
A full rotation type, sheet web shearing machine comprising a rotary blade with a shearing edge, a stationary blade with a shearing edge, a motor for driving and braking the rotary blade, a cam for detecting a rotation angle of the rotary blade and gears for reducing the revolution speed of the motor. The full rotation type, sheet web shearing machine may cut sheet web to a given length. Owing to one full rotation of the rotary blade, it can cut the sheet web running continuously at a high speed without jam. The rotary blade is rotated, through gears driven by the motor and also is braked by making a braking circuit between electrical terminals of the motor so that the rotary blade is stopped at a predetermined angle.
Claims28
A full rotation type, sheet web shearing machine comprising;
- a rotary blade having a shearing edge mounted on a rotatable cylindrical shank,
- a stationary blade having a shearing edge elastically contacting the edge of the rotary blade, the stationary blade shearing the sheet web with the rotary blade,
- means for driving the rotary blade,
- means for detecting a rotation angle from a starting position of the rotary blade,
- means for braking the rotary blade and means for sending a timing signal of braking to the means for braking and to the means for driving as the rotation angle coincides with a present angle, so as to bring the rotary blade at a predetermined angle to a halt.
A full rotation type, sheet web shearing machine comprising:
- a rotary blade having a shearing edge mounted on a rotatable cylindrical shank;
- a stationary blade having a shearing edge and being biased against said rotary blade so as to coact with said rotary blade to shear a sheet web therebetween;
- means for driving said rotary blade;
- means for braking said rotary blade;
- and
- control means associated with said driving means and said braking means including first means for energizing said driving means upon receipt of a cutting order signal, second means for holding said driving means in an energized condition after the cutting order signal is stopped, and third means for detecting a predetermined rotating position of said rotary blade and for de-energizing said driving means and for actuating said braking means on detecting said predetermined rotating position.
Dependencies are inferred from the claim text.