Flow-restricted printing cylinder for a removable printing sleeve
First Claim
1. A printing cylinder for accepting an axially-movable printing sleeve comprising:
- a cylinder body having an outer surface, the outer surface having at least one hole; and
a supply line in the cylinder body for supplying fluid to the at least one hole, the supply line having at least one flow restrictor designed to alter fluid flow as a function of an axial position of the axially-movable printing sleeve;
the flow restrictor including a ball valve, the ball valve as a function of the axial position of the printing sleeve moving between an open position and a closed position where the fluid flow is reduced from the fluid flow in the open position, the ball valve having a fluid bypass permitting air to pass when the ball valve is in a closed position.
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Accused Products
Abstract
A printing cylinder for accepting an axially-removable printing sleeve includes a cylinder body having an outer surface, the outer surface having at least one hole and a supply line in the cylinder body for supplying fluid to the at least one hole. The supply line has at least one flow restrictor designed to alter fluid flow as a function of the at least one hole being covered by an axially-removable printing sleeve. Also provided is a printing press having two such cylinders and a common pressure source. A method for axially removing a printing sleeve over a printing cylinder includes the steps of applying fluid pressure to an inside of a printing sleeve located on a printing cylinder through holes at a work side end of the printing cylinder and through other holes between the holes at the work side end and a gear side end of the printing cylinder, sliding the printing sleeve in a direction of the work side end of the printing cylinder, and automatically restricting flow through the other holes when the printing sleeve no longer is located over the other holes.
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Citations
14 Claims
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1. A printing cylinder for accepting an axially-movable printing sleeve comprising:
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a cylinder body having an outer surface, the outer surface having at least one hole; and
a supply line in the cylinder body for supplying fluid to the at least one hole, the supply line having at least one flow restrictor designed to alter fluid flow as a function of an axial position of the axially-movable printing sleeve;
the flow restrictor including a ball valve, the ball valve as a function of the axial position of the printing sleeve moving between an open position and a closed position where the fluid flow is reduced from the fluid flow in the open position, the ball valve having a fluid bypass permitting air to pass when the ball valve is in a closed position.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for axially positioning a printing sleeve over a printing cylinder comprising the steps of:
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applying fluid pressure to an inside of a printing sleeve located on a printing cylinder through at least one hole of the printing cylinder;
moving the printing sleeve axially with respect to the printing cylinder; and
automatically restricting fluid flow through the hole using a flow restrictor, the flow restrictor altering the fluid flow as a function of an axial position of the printing sleeve on the printing cylinder;
the flow restrictor including a ball valve, the ball valve as a function of the axial position of the printing sleeve moving between an open position and a closed position where the fluid flow is reduced from the fluid flow in the open position, the ball valve having a fluid bypass permitting air to pass when the ball valve is in a closed position.- View Dependent Claims (12, 13, 14)
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Specification