PURPOSE: To enable rapid processing, to enhance a maintenance characteristic and to enable the formation of a uniform printing image by recovering an unused developer by width adjusting type scraping blades from the developer in the non-contact part of a planographic printing plate and a liquid lifting roller.
CONSTITUTION: The liquid lifting coating roller 1a is partly immersed in the developer of a developer tank 2. This roller lifts the developer by rotation and applies and supplies the developer to a planographic printing plate P transported with its photosensitive surface downward. The developer is transferred to the planographic printing plate P from the coating roller 1a when the plate arrives at between the nips of the coating roller pair. The width adjusting type scraping blade 4 is brought into contact with the liquid lifting coating roller 1a to recover the unused developer in such a case. This width adjusting type scraping blade 4 has a function to adjust the scraping part in conformity with the width of the planographic printing plate P. The blade 5 for scraping the used developer sticking to the liquid lifting coating roller 1a is provided.
ANDO MASAKAZU
NOZAKI TSUNETO