Safe access arrangement for driven mechanisms in a printing pres

Details Safe access arrangement for driven mechanisms in a printing pres Safe access arrangement for driven mechanisms in a printing pres

1975-06-23

1977-01-04

Burr, Edgar S.

Printing

Multicolor

Rotary machines

101217, 200 50A, B41F 3312

Patent

active

040006930

ABSTRACT:
A safe access arrangement for a printing press having remotely located driven mechanisms normally enclosed by guards or covers and which are removable to provide access for observation, adjustment or servicing. Remote control modules are located under the respective access covers each module having a motor remote control switch and a shiftable interlock switch, the shiftable switch being automatically thrown from a normal position to a shifted position when the access cover is removed. Each shiftable switch includes a first contact for disabling the main switch of the press and a second contact for activating, or "enabling", operation of the associated motor remote control switch so that the motor may only be turned on by the remote control switch at the location of the open cover. Each shiftable switch includes interlock contacts paired with corresponding contacts in each of the other remote control modules to control a disabling circuit so that the motor is totally disabled when two or more covers are open simultaneously, thereby to prevent someone at a second opened cover from starting the motor and causing injury to the press operator, or damage to the mechanism, at a first opened cover.

REFERENCES:
patent: 3141074 (1964-07-01), Rexroad
patent: 3534186 (1970-10-01), Meyer
patent: 3691329 (1972-09-01), Ball
patent: 3828673 (1974-08-01), Gazzola et al.

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