APPARATUS FOR EXPOSURE OF PRINTING PLATES USING IMAGE MODIFICATION

摘要

A recorded image is distorted on a printing plate when an image information for a computer is recorded in the form of a band with a band width of a plurality of i mage elements on a printing plate wound around a drum. This invention provides an und istorted recording on the printing plate, made possible by an arrangement that has a prin ting plate wound around a drum in the form of a right circular cylinder, and exposure unit to record image information in the form of a band on the printing plate by means of a ligh t beam, a moving mechanism to move the exposure unit by one band width in the direction of the drum axis in relation to the drum while the drum makes a revolution, an image tr eating apparatus with the image information stored in the form of a right quadrangle, a nd an image modulator to rearrange and slant each band of image information readout fr om said image treatment apparatus by one band width in the opposite direction to the mov ement of said moving mechanism.