SHEET GUIDANCE ROLLER WITH FRONTAL RADIATION SHIELDING AND IRRADIATION DEVICE

摘要

A roller (2) for an irradiation device is described, wherein the roller is designed to guide a material web to be irradiated past at least one electron emitter (8). The roller comprises a first end region (14) of the roller, wherein the diameter of the first end region is smaller than the diameter of the roller, and a lateral surface (16) of the roller, which is formed as a lateral surface of a right circular cylinder. The lateral surface extends in the axial direction from a first axial position to a second axial position of the roller, wherein the first axial position has an axial distance to the edge of the first end portion, which is between 3% and 25% of the length of the roller, and wherein the second axial position is farther from the first end portion than the first axial position. The roller includes a first arcuate transition region (15) which extends annularly from the edge of the first end region in a continuous course to the first axial position of the roller. In this case, viewed in a longitudinal plane through the center axis of the roller, a curvature of the contour of the roller at the transition from the first end region to the first curved transition region, within the first curved transition region and at the transition from the first curved transition region to the lateral surface each smaller than a maximum curvature a minimum radius of curvature of 5% of the diameter of the roller.