Abstract: It is the object to provide a printing press having no fear of interruption of printing operation and also having a structure by which the utilization efficiency thereof is increased. A printing press is provided that includes a plurality of blowers each having an air supply tube for supplying air, a header pipe to which the air supply tubes of all the blowers are connected, and a plurality of air showers for executing predetermined processes using air supplied from the header pipe through pneumatic tubing, by which the respective air showers are connected to the header pipe.

Abstract: An object is to provide a printing machine nip checking system and the like that facilitates a nip checking operation. In the invention, a subject roller selecting section 10 is provided that selects a roller of which a nip width is to be checked. When a subject is narrowed, a main gear rotation angle calculating section 11 determines a rotation angle of the selected roller, in addition to a rotation direction. A main gear rotation driving section 13 connected to the main gear rotation angle calculating section 11 rotates a main gear 18 by the calculated desired angle, after the main gear 18 is stopped for a certain amount of time. As a result, an operator can visually recognize a nip on a subject gear without particularly considering the rotation direction and the rotation angle of the main gear 18.

Abstract: It is an object of the present invention to secure safety of a human body accessible to a side of a delivery conveyor during operations of a printing machine. Each of sensors 79 in an area sensor that form a sensing area B to prevent access of a human body to the side of a delivery conveyor (a chain gripper or the like) is arranged on the side of the delivery conveyor of a delivery unit in a paper ejector 7. Sensing operations of some of the sensors 79 in the area sensor are controlled to be turned off by a control device 9 in conjunction with a preset instruction of presetting a size of sheet and operations of the printing machine to sense access of a human body to the side of the delivery conveyor and prevent a sheet from being sensed by the sensors 79 during printing operations.

Abstract: A printing press is configured such that the printing sheet is supplied from the paper feeding unit through the intermediate cylinder 14 while the ink is supplied from the ink apparatus to the blanket cylinder 11 through the printing cylinder 12 and, when the printing sheet passes between the blanket cylinder 11 and the impression cylinder 13, the ink is transferred from the blanket cylinder 11 and, thereby, printing is executed. In the printing press, the rotary encoder 31 detects the rotation angle of the blanket cylinder 11 and the control unit 32 receives the instructions of the head portion finding switches 33b, 33c and drives and controls the driving unit 16 and, thereby, the blanket cylinder 11 can be rotated and stopped to/at the blanket replacement angle for replacing the blanket 28 wound around the blanket cylinder 11.