Patent ID: 6994795

Claim:
Apparatus for filtering viscous material comprising a device pressing the material to be cleaned from an upstream conduit of a supply housing towards a band-shaped screen which on its downstream side is supported by a perforated plate against a pressure of the pressed material and is slidable crosswise a flow direction of the material to be cleaned for replacement of a soiled band section by a fresh band section, wherein a device for facilitating of this displacement is provided which device comprises a storage space for material to be cleaned, which storage space is connected to the upstream conduit, in which storage space a piston is sealingly guided, which piston is reciprocable by a drive means and in its projected position closes the storage space against the upstream conduit, the device for facilitating the adjustment of the screen comprising a closure means disposed on the upstream side of the screen, by which closure means the upstream conduit for the material to be filtered can be mainly closed, and which closure means, when seen in the flow direction of the material to be cleaned, is disposed between the storage space and the screen.