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US 5,454,311 AGranted
Apparatus for compensating for cylinder sag
AssigneeAlbert-Frankenthal AG
InventorRoland Reffert
Life of this patent
Estimating the term…
Abstract
An apparatus for compensating for cylinder sag in a gravure forme cylinder utilizes a support roller which is located beneath the gravure forme cylinder in an ink trough. The support roller has a length that is less than the length of the gravure forme cylinder.
Claims8
An apparatus for compensating for cylinder sag in a rotary printing press, said apparatus comprising:
- a forme cylinder supported between spaced side frames of a rotary printing press for rotation about a first center of rotation and having a first length;
- a pressure roller positioned above said forme cylinder and acting on a peripheral surface of said forme cylinder;
- a support roller having a coating suitable for power transmission and supported for rotation about a second center of rotation and having a second length;
- an ink trough having a bottom surface, said ink trough being positioned beneath said forme cylinder;
- means for supporting said support roller beneath said forme cylinder in said ink trough;
- and
- means for exerting an upward force on said ink trough to move said support roller toward, and into engagement with a peripheral surface of said forme cylinder.
4 more elements
An apparatus for compensating for cylinder sag in a rotary printing press, said apparatus comprising:
- a forme cylinder supported between spaced side frames of a rotary printing press for rotation about a first center of rotation and having a first length;
- a pressure roller positioned above said forme cylinder and acting on a peripheral surface of said forme cylinder;
- a support roller supported for rotation about a second center of rotation and having a second length, said first and second centers of rotation being situated on a generally vertical line;
- an ink trough having a bottom surface, said ink trough being positioned beneath said forme cylinder;
- means for supporting said support roller beneath said forme cylinder in said ink trough;
- an ink forme roller supported for rotation in said ink trough parallel to said support roller and outside of said generally vertical line;
- and
- means for exerting an upward force on said ink trough to move said support roller and said ink forme roller toward, and into engagement with a peripheral surface of said forme cylinder.
5 more elements
Dependencies are inferred from the claim text.