Plate lock-up apparatus

Details Plate lock-up apparatus Plate lock-up apparatus

1991-07-03

1992-06-23

Burr, Edgar S.

Printing

Flexible-sheet-securing devices

292257, B41F 128, B41F 2100

Patent

active

051233533

ABSTRACT:
A lock-up mechanism for use in securing a flexible printing plate 14 in a printing press, the flexible printing plate 14 having a leading edge 14 and a trailing edge 16. The lock-up mechanism has a plate cylinder 10 having a longitudinal groove 20 in an outer surface thereof and a lock-up body 22 contained in the longitudinal groove 20 of the plate cylinder 10. The lock-up body 22 has a longitudinal slot 24 having a narrow opening 26 formed by opposed nose sections 28, 30 of the lock-up body 22, the nose sections each having an inner surface, 36, 38. A rotatable mechanism 40 in the longitudinal slot 24 releasably secures the leading and trailing edges 16, 18 of the flexible printing plate 14, the flexible printing plate 14 being wrapped around the outer surface of the plate cylinder 10. A first apparatus 48, 51, 55, 36 provides at least one predetermined lock position of the rotatable mechanism 40 wherein the leading and trailing edges 16, 18 of the flexible printing plate 10 are secured. A second apparatus 48, 52, 53, 36 provides at least one predetermined unlock position of the rotatable mechanism 40 wherein the leading and trailing edges 16, 18 of the flexible printing plate 10 are unsecured. The rotatable mechanism 40 has at least one lock holding structure 48, 51 within the longitudinal slot 24 for holding the rotatable mechanism 40 in the at least one predetermined lock position and at least one unlock holding structure 48, 52 within the longitudinal slot 24 for holding the rotatable mechanism 40 in the predetermined unlock position. The rotatable mechanism 40 is rotatable between the predetermined lock position and the predetermined unlock position.

REFERENCES:
patent: 3626848 (1971-12-01), Tafel et al.
patent: 3727551 (1973-04-01), Kostas et al.
patent: 3757691 (1973-09-01), Etchell et al.
patent: 3913480 (1975-10-01), Dauner et al.
patent: 4495865 (1985-01-01), Kamoda

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