Adjustable drive system for matching surface speeds of a transfer roll and plate roll and method thereof
First Claim
Patent Images
1. A method of flexographic printing comprising the steps of:
- rotating an impression roll and an adjacent plate roll over a range from a low speed to a high speed;
contacting an ink roll with said plate roll to transfer ink therebetween;
measuring the rotational speed of said plate roll over said range and providing an output signal proportional thereto;
rotating said ink roll as a function of said output signal and proportional to the rotation of said plate roll as the radius of said plate roll is to the radius of said ink roll.
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Abstract
A variable speed flexographic printer with means to match surface speeds of an ink transfer roll with the associated plate roll. A tachometer measures the rotational speed of a plate roll providing a variable DC input through means which adjust said input proportional to the diameters of the plate and ink transfer rolls providing a proportional variable DC signal to a variable speed DC motor driving the ink transfer roll. A wiper and metering blade is mounted to a block adjustably movable to and from the ink roll depending upon the diameter thereof.
14 Citations
3 Claims
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1. A method of flexographic printing comprising the steps of:
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rotating an impression roll and an adjacent plate roll over a range from a low speed to a high speed; contacting an ink roll with said plate roll to transfer ink therebetween; measuring the rotational speed of said plate roll over said range and providing an output signal proportional thereto; rotating said ink roll as a function of said output signal and proportional to the rotation of said plate roll as the radius of said plate roll is to the radius of said ink roll. - View Dependent Claims (2, 3)
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Specification