Rotary die cutting machine
AssigneeKirby's Engineers, Ltd.
InventorsJames H. Highfield, Roy Pugh
Life of this patent
Estimating the term…
Abstract
A rotary die cutter for cutting sheet material has a drive mechanism which reduces the shock applied between the work piece and the die. Including a drive train for the die cutting rollers which permits slippage. The drive train can have a tension belt system which allows slippage when excessive force is required at the die so that the shock on the prime mover and drive train is minimized.
Claims16
A die cutter for cutting a blank of a sheet material against a die comprising a backboard having upwardly facing cutting edges, the die cutter comprising:
- a first roller and means for driving the first roller;
- a second roller mounted parallel to the first roller and spaced therefrom, and, means for driving the second roller oppositely of the first;
- a first feed means for conducting the die to the rollers, the rollers drawing the die therethrough and pressing the die;
- second feed means for conducting the die from the rollers, and means to permit at least one roller to slip to accomodate dies passing between the first and second rollers;
- the first and second rollers being vertically opposing, with the second roller above the first roller, the first feed means positioned in front of the rollers and the second feed means positioned in the rear of the rollers;
- the die cutter further comprising a first sensor means for sensing when a die is on the rearward side of the roller;
- and
- means responsive to the first sensor means for stopping the first and second feed means and the rollers.
A die cutter for cutting a blank of sheet material against a die comprising a backboard having upwardly facing cutting edges, the die cutter comprising:
- a frame;
- a first roller, means for rotatably mounting the first roller in the frame, and means for driving the first roller;
- a second roller, means for mounting the second roller in the frame vertically above and generally parallel to and spaced from the first roller, said mounting means including means for simultaneously, selectively raising the ends of the second roller to adjust the spacing between the rollers while maintaining the rollers generally parallel to each other, and means for frictionally driving the second roller from the first roller to allow stoppage therebetween;
- a first feed means in front of the rollers operable rearward to feed the rollers and forward from the rollers for conducting a die to and from the rollers;
- a second feed means in the rear of the rollers operable rearward for conducting a die from the rollers, and forward to the rollers;
- means for driving the first and second feed means from the first roller, the die cutter operable rearward with the first and second means and the roller moving rearward and forward with the first and second feed means and the roller a die forward;
- the die cutter further comprising a first sensor means for sensing when a die is on the rearward side of the rollers;
- and
- means responsive to the first sensor means for stopping the first and second feed means and the rollers.
Dependencies are inferred from the claim text.