Abstract: A clamping mechanism for securing a cutting die board to a rotary support cylinder, including a double-acting pressure cylinder having a piston rod coupled to a clamping bolt which cooperates with a keyhole-shaped slot formed through the cutting die board, and an arrangement for supplying low pressure air to an extension chamber defined on one side of the pressure cylinder piston for controlling the magnitude of force applied to the bolt during extension thereof. In an alternate embodiment, a low-force releasable slip coupling connects between the piston rod and the bolt to control the extension force applied to the bolt.

Abstract: A clamping mechanism for securing a cutting die board to a rotary support cylinder, including a double-acting pressure cylinder having a piston rod coupled to a clamping bolt which cooperates with a keyhole-shaped slot formed through the cutting die board, and an arrangement for supplying low pressure air to an extension chamber defined on one side of the pressure cylinder piston for controlling the magnitude of force applied to the bolt during extension thereof. In an alternate embodiment, a low-force releasable slip coupling connects between the piston rod and the bolt to control the extension force applied to the bolt.

Abstract: A washing apparatus for a printing roll, particularly a flexographic printing roll having raised printing areas. The washing apparatus includes a troughlike housing provided with an open mouth positioned adjacent the peripheral surface of the printing roll. The housing, surrounding the open mouth, has sealing strips which engage the print roll surface. First and second nozzles are mounted in the housing for respectively discharging streams of cleaning liquid and rinsing liquid against the periphery of the roll as it moves past the mouth of the housing. A brush is positioned within the housing for contacting the print areas on the roll generally between the regions contacted by the nozzle streams. The liquid and debris collect within the housing, and are sucked therefrom for exterior discharge.

Abstract: An apparatus is provided to pick up single sheets of semi rigid material from a stack and convey them to a further location. The pick up mechanism employs a primary carriage assembly supported for horizontal linear movement. A row of vertically movable suction devices mounted on the carriage lift the sheet adjacent a trailing edge. A secondary carriage including finger elements engages the raised sheet to push it across the stack into nip rollers.