Method and apparatus for changing printing length on a printing press
AssigneeGoss International Corporation
InventorsDan Zimich, Dan Machaj
Life of this patent
Estimating the term…
Abstract
To modify an existing printing press from its original length/cut off to a different cut off, a sub-frame may be mounted on an existing frame of a printing press. The sub-frame permits the relocation of bearing supports for various printing cylinders, such as, for example, the plate cylinders and blanket cylinders. In addition to mounting the sub-frame on the existing frame, new plate and blanket cylinders having different sizes than the plate and blanket cylinders used in the existing printing press may be mounted in the sub-frame to provide different printing lengths/cut offs. Suitable sleeves, such as the eccentric mounting sleeves may be provided as necessary in order to mount the cylinders to the sub-frame.
Claims14
A sub-frame for use with a frame of a printing press, the frame of the printing press having cylinder mounting bores, the sub-frame comprising:
- a first sub-frame side having a plurality of bores and mountable to the printing press frame;
- a second sub-frame side having a plurality of bores and mountable to the printing press frame spaced from the first sub-frame side, each bore of the first sub-frame side and a corresponding one of the bores of the second sub-frame side alignable along a common bore axis to support a printing cylinder;
- at least some of the bores of the first and second sub-frame sides disposed on the sub-frame sides so as to be offset relative to a pair of aligned mounting bores on the printing press frame when the first sub-frame side and the second sub-frame side are mounted to the printing press frame;
- and
- at least one of the bores of the first and second sub-frame sides disposed on the sub-frame sides is arranged relative to at least one of the mounting bores on the printing press frame so as to permit a drive end of the printing cylinder to extend through the at least one bore on the sub-frame and the at least one mounting bore on the printing press frame when the printing cylinder is mounted to the sub-frame.
A method of using a plurality of print cylinders of a second size in a printing press having a plurality of print cylinders of a first size, the method comprising:
- removing the print cylinders of the first size from a frame, the frame having a plurality of spaced apart frame bores, each pair of spaced apart frame bores having a common bore axis to support and operatively couple the print cylinders of the first size;
- mounting a sub-frame to the frame, the sub-frame including a plurality of spaced apart sub-frame bores, each pair of spaced apart sub-frame bores having a common bore axis to support and operatively couple the print cylinders of the second size;
- wherein at least one of the sub-frame bores and at least one of the frame bores are disposed to permit a drive end of the selected one of the print cylinders to extend through the at least one sub-frame bore and the at least one frame bore when the selected print cylinder is mounted to the sub-frame;
- and
- mounting each of the print cylinders of the second size in the sub-frame, the mounting including mounting shaft end bearing assemblies of each print cylinder of the second size in a pair of the spaced apart bores of the sub-frame, wherein one or both of the shaft end bearing assemblies are arranged to be shiftable toward and away from one another when mounted to the print cylinder of the second size.
Dependencies are inferred from the claim text.