Print unit cylinder for rotary presses
AssigneeHeidelberger Druckmaschinen AG
InventorsRudi Junghans, Werner Weber
Life of this patent
Estimating the term…
Abstract
The invention relates to a print unit cylinder for rotary presses, the cylinder having a narrow non-printing gap for accommodating the rubber blanket or pressplate ends, the gap running parallel to the axis of the cylinder, and also an elastomeric filler element for bridging the non-printing gap opening to thus prevent a sudden change of the roll characteristic when two interacting cylinders roll over the cylinder gaps.
Claims20
A print cylinder for a rotary printing press, said spring cylinder being for supporting at least one of:
- a rubber blanket and a printing plate about a circumference of the print cylinder, at least one of:
- the rubber blanket when supported about the print cylinder and the printing plate when supported about the print cylinder defining a diameter, said print cylinder comprising:
- an axial groove disposed along the circumference of said print cylinder, the axial groove for receiving ends of the at least one of:
- the rubber blanket and the printing plate, the axial groove with the ends of the at least one of:
- the rubber blanket and the printing plate disposed therein comprising a first side, a second side, and a width;
- a filler element for being disposed in the axial groove to bridge the width from the first side of the groove to the second side of the groove to thereby substantially reduce cylinder vibration during rotation of said print cylinder;
- said filler element comprising elastomeric material;
- said filler element having:
- a first portion having a width greater than the width of the axial groove, said first portion for contacting the first side and the second side when the filler element is disposed within the axial groove;
- and
- said first portion of said filler element having an outer contour which protrudes a distance beyond said diameter when the filler element is disposed within the axial groove to thereby absorb contact pressure generally equal to contact pressure absorbed between
- the at least one of:
- the rubber blanket and the printing plate supported on the print cylinder, and
- an adjacent cylinder to substantially reduce cylinder vibration during said rotation of the cylinder.
A filler element for use with a printing cylinder for a rotary printing press, the printing cylinder having an axial groove therein, the filler element for being disposed in the axial groove of the print cylinder, the print cylinder being for supporting at least one of:
- a rubber blanket and a printing plate about a circumference of the print cylinder, and at least one of:
- the rubber blanket and the printing plate when supported about the print cylinder defining a diameter, the axial groove for receiving ends of the at least one of:
- the rubber blanket and the printing plate, the axial groove with the ends of the at least one of:
- the rubber blanket and the printing plate disposed therein comprising a first side, a second side, and a width, said filler element comprising:
- at least a first portion for bridging the groove in which the filler element is for being disposed from the first side of the groove to the second side of the groove to thereby substantially reduce cylinder vibration during rotation of the print cylinder in which the filler element is being used;
- said first portion having a width greater than the width of the axial groove in which the filler element is for being disposed, said first portion for contacting the first side and the second side when the filler element is disposed within the axial groove in which the filler element is for being disposed;
- said first portion having an outer contour protruding beyond said diameter when said filler element is disposed within the axial groove in which the filler element is for being disposed;
- and
- said filler element comprising elastomeric material.
Dependencies are inferred from the claim text.