CHEAT PROOF SAFETY INTERLOCK FOR COVERS
Original Publication Date: 1989-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In an electrophotographic printing machine, it is necessary to disable the printing machine when the covers are opened. This insures that the machine operator cannot be inadvertently' injured by the operation of the various subsystems during servicing. Thus, it is necessary to use a cheat proof safety interlock for the exterior covers of the printing machine. The interlock includes an actuator and a detector. One resides on the cover with the other being on the frame. The machine logic interrogates the detector to sense when actuator motion starts. This can only occur when the covers are in the closed position. The interlock can reside on two covers, in which case one interlock secures both covers. The actuator is a solenoid with the detector being a switch.