Patent ID: 6230597
Filing Date: 2001-05-15
Classification: B26D,Y10T

Abstract:
A rotary die cutter comprising frames, a die cut cylinder and an anvil cylinder each having opposite ends rotatably supported in the frames via a bearing, and a circulating system for circulating oil in at least one of the die cut cylinder and the anvil cylinder to reduce a temperature difference of said one of the die cut cylinder and the anvil cylinder in a width direction thereof, said one of the cylinders being hollow and having a partition plate dividing an interior of the hollow cylinder into separate portions each communicating with one of the opposite ends, said circulating system including an oil supply pipe extending through each of the opposite ends of the hollow cylinder into each of the separate portions of the interior for circulating oil in each of the separate portions, and an oil return hole in each of the opposite ends for returning oil from each of the separate portions to a reservoir in each of the frames.