TRANSFER ROLL OF PRINTING PRESS AND SECURITY ELEMENT FOR ELECTROMAGNETIC VALVE EMBEDDED IN TRANSFER ROLL Russian patent published in 2021 - IPC B41F31/14 B41F31/26 B41F31/30 

FIELD: printing.

SUBSTANCE: proposed transfer roll for printing presses comprises a shaft provided with an air-feeding pipe, several individual transfer rolls and several electromagnetic valves, with each of which being connected to a shaft. The electromagnetic valves pneumatically move individual transfer rolls. Individual transfer rolls have bodies which are connected to a shaft and have a configuration enabling forward and backward movement, elements of rolls which are configured in such a way that they are capable of contacting with the blowing shaft of the colouring device and the distributing printing ink roll and bearings connecting the elements of the roll to the bodies. The electromagnetic valves are located in the bodies. The security elements for the electromagnetic valves are oil-resistant, have round cylindrical or arc-like covers and are connected to the shaft. They cover the ends of the sides of the bodies and are located in a gap between the individual transfer rolls.

EFFECT: technical result consists in elimination of the need to replace security elements, to release cleaning fluid for printing presses along the ink fountains and the prevention of contamination of the electromagnetic valves by cleaning liquid.

6 cl, 10 dwg