APPARATUS FOR MONITORING THE LUBRICATING STATE OF A ROTATING BELT， TO WHICH A LUBRICANT HAS BEEN APPLIED， FOR TRANSPORTING MATERIAL TO BE PRESSED

The invention relates to an apparatus for monitoring the lubricating state of a rotating belt (4)， to which a lubricant has been applied， for transporting material to be pressed， in particular in a continuously operating press (1)， said apparatus comprising at least one first detection device (D1) of a first type located in the region of the belt (4) and at least one second detection device (D2) of a second type located in the region of the belt (4). The first detection device (D1) is designed to produce a quantity signal (S1) dependent on the quantity of lubricant on the belt (4). In order to distinguish a lubricant on the belt (4) from dirt particles on the belt (4) or from a lubricant contaminated with dirt particles， the second detection device (D2) is designed to produce a material signal (S2) dependent on the extent to which the lubricant on the belt (4) is contaminated.