“Offset” machine to print rubber hoses of different diameters in movement. The pipe is flattened by the rubber covered roller during the printing phase. Interchangeable metal printing plates andor characters are used for a precision print even with small characters. Flexographic inking with liquid ink. Indirect printing procedure. Inks of different colours including white. Drive transmitted by the conveyor belt. Overhung assembly on adjustable precision runners to finely adjust the printing pressure. Safety machine blocking device.