Adjustable form roll apparatus

A method of adjustably positioning a form roll having a form roll axis against at least two different sized plate cylinders in a variable cutoff printing unit, the form roll being supported by a form roll hanger, the method comprising:

• placing a first plate cylinder cam of a first cam size and first plate cylinder of a first cylinder size on a plate cylinder support;
• contacting the first plate cylinder cam with the form roll hanger, the contacting of the first plate cylinder cam with the form roll hanger causing the form roll to enter into a loaded position with the first plate cylinder;
• removing the first plate cylinder cam and the first plate cylinder from plate cylinder support;
• placing a second plate cylinder cam of a second cam size and second plate cylinder of a second cylinder size on the plate cylinder support;
• and
• contacting the second plate cylinder cam with the form roll hanger, the contacting of the second plate cylinder cam with the form roll hanger causing the form roll to enter into a loaded position with the second plate cylinder.

A variable cutoff printing unit comprising:

• a plate cylinder support including a plate cylinder axis, the plate cylinder support configured for removably supporting a plate cylinder;
• a plate cylinder cam supported on the plate cylinder support;
• a form roll for transferring printing fluid to the plate cylinder supported on the plate cylinder assembly;
• and
• a form roll hanger supporting an axial end of the form roll and contacting the plate cylinder cam supported on the plate cylinder support to adjustably position the form roll against the plate cylinder supported on the plate cylinder assembly, the form roll hanger including a surface for contacting the plate cylinder cam, the adjustment assembly being movable along a predefined path to vary a distance between a plate cylinder axis and a form roll axis.