Patent ID: 9605761
Date: 2017-03-28
CPC Classifications: D21F,D21G,F16J

Claim:
1. A seal assembly for sealing at least one negative pressure zone adjoining a perforated surface and moving in a movement direction, the seal assembly comprising: a receptacle which is axially movable to change a format of the negative pressure zone; a moving surface; at least one sealing element located opposite said moving surface, said at least one sealing element being arranged in said receptacle; and a signal transmitter connected directly or indirectly with said at least one sealing element, a signal from said signal transmitter being receivable on a side of said moving surface facing away from said at least one sealing element, said at least one sealing element having a bore formed therein, said bore being arranged such that said signal can pass through said bore, wherein said bore is filled with a material permeable to said signal and includes a flushing device.