Printing cylinder having annular groove

Details Printing cylinder having annular groove Printing cylinder having annular groove

1996-10-31

1999-06-22

Burr, Edgar

Printing

Printing members

Rolling contact

492 2, 492 6, B41F 1308, F16C 1300

Patent

active

059132663

ABSTRACT:
A printing cylinder 20 has a length for mass printing and is used for an inking roller group for supplying printing ink, a plate cylinder having a printing plate, a blanket cylinder for printing with the ink transferred from the printing plate, etc. A ring groove 25 is dug at each end face of the printing cylinder 20 so as to open annularly and to have a depth of 1/4 to 1/3 of the length of the printing cylinder 20 in the axial direction of the printing cylinder. Deflection deformation caused on the outer circumference of the printing cylinder 20 can thereby be equalized at the central portion and both end portions of the printing cylinder 20. Axial directional changes in the pressing force caused by the deflection deformation can be reduced, and even with the elongated printing cylinder 20 of the same cylinder diameter as a conventional one, irregularities of inking in the axial direction of the printing cylinder 20 due to changes in the pressing force do not occur. Thus a high quality printing is maintained.

REFERENCES:
patent: 242058 (1881-05-01), Schurmann
patent: 2048005 (1936-07-01), Horton
patent: 3750246 (1973-08-01), Pessen
patent: 3840958 (1974-10-01), Mahn
patent: 4381961 (1983-05-01), Van Der Velden
patent: 4602408 (1986-07-01), Noe et al.
patent: 4813258 (1989-03-01), Ginzburg
patent: 4895070 (1990-01-01), Bird
patent: 4913048 (1990-04-01), Tittgemeyer
patent: 5093974 (1992-03-01), Ginzburg
patent: 5111930 (1992-05-01), Ginzburg et al.
patent: 5216953 (1993-06-01), Hada

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