a copy sheet - feeding apparatus comprises a switch and control mechanism . the switch detects an open state of a sheet cover capable of exposing a stack of copy sheet and a closed state of the cover sheet capable of enclosing the stack , and generates signals denoting the open and closed states of the sheet cover . the control mechanism controls a drive mechanism for moving a sheet rest supporting the stack of copy sheets between a first position capable of receiving the copy sheets and a second position capable of supplying the sheet to a copying press . receiving the signal denoting the open state of the sheet cover from the switch , the control mechanism causes the sheet rest to be moved to the first position , and , receiving the signal denoting the closed state thereof , causes the sheet rest to be moved to the second position .