Importance

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Abstract

A conveyor belt transfer section moves printed sheets at constant speed from a printer to a platen type die-cutter, this constant speed being equal to the printer speed. The die-cutter is provided with an intermittently operated sheet conveyor having a gripper bar that is moved intermittently so as to fully stop in succession at a plurality of locations including an infeed station and a working station downstream of the infeed station. When the bar is stopped at the infeed station, sheet grippers mounted thereon are opened and are kept open while the bar is accelerated in the downstream direction. As a sheet approaches the infeed station, the bar begins to move away from the infeed station at an acceleration rate which permits the sheet to enter the open grippers on the moving bar. These grippers are closed to hold the sheet when sheet speed and gripper bar speed are essentially equal. With its grippers closed, the bar continues to accelerate, then decelerate and finally stops at the working station with the sheet operatively positioned between the platens of the die cutter.

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First Claim