Abstract: A self-running and automatic cleaning-coating machine for working the internal wall of a pipe comprising a travel-driving truck, a motor-placing truck a paint-supplying truck and a working truck wherein these trucks are flexibly coupled to one another and including operation mechanisms which is self-running to a required position and automatically operated to clean and coat the internal wall.

Abstract: A method of coating liquid coating compositions on a moving continuous web comprising roughening only the surface of a portion of the smooth web surface onto which coating is started. The method of this invention avoids the production of a thick coating to thereby prevent contamination in the steps and the process and requires no excess increase in drying, and the method is especially advantageous in the manufacture of photographic films, photographic papers, magnetic recording tapes, adhesive tapes, pressure sensitive recording papers, offset printing papers, etc.