Safety rail for accident prevention in rotary printing machines

Details Safety rail for accident prevention in rotary printing machines Safety rail for accident prevention in rotary printing machines

1987-03-05

1988-08-23

Pearson, Charles

Printing

Rolling contact machines

Rotary

68264, B41F 500

Patent

active

047652403

ABSTRACT:
A safety guard rail (7) can be moved between a position adjacent a nip between two rotating cylinders (3, 4) and a remote position. The safety guard rail has flanges (8, 9) attached thereto, projecting essentially parallel to cover plates (5, 6) already present in the printing machine. The cover plates are formed with guide slits (12, 13) extending downwardly at an inclination, in which guide elements (10, 11) engage, secured to the projecting flanges which hold the safety guard rail (7). Limit switches are coupled to be engaged by the flanges and/or the guide elements to provide ON and OFF signals, in dependence on the position of the safety guard rail with respect to the nip, to inhibit printing machine operation when the guard rail is in a remote position, for example for changing of rubber blankets on the cylinders, and permitting printing machine operation only when the safety guard rail (7) is adjacent the nip to be able to carry out its safety guarding function.

REFERENCES:
patent: 1519297 (1924-12-01), Del Greco
patent: 1803066 (1931-04-01), MacCafferty
patent: 3256395 (1966-06-01), Grau et al.
patent: 3498217 (1970-03-01), Kletti
patent: 4295421 (1981-10-01), Abendroth et al.
patent: 4454812 (1984-06-01), Johne et al.
patent: 4669380 (1987-06-01), Seib et al.

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