Filter apparatus for fluids to be cleaned

摘要

PCT No. PCT/AT92/00035 Sec. 371 Date Sep. 23, 1993 Sec. 102(e) Date Sep. 23, 1993 PCT Filed Mar. 19, 1992 PCT Pub. No. WO92/16351 PCT Pub. Date Oct. 1, 1992.A filter apparatus for thermoplastic synthetic plastics material includes a screen carrier member having at least one screen nest, the screen carrier member being shiftable in a longitudinal direction in a housing. For backwashing the screen nest, the screen nest is in connection with a washing channel in a washing position of the screen carrier member In order to make the washing process quickly, effectively and uniformly over the surface of the screen and in order to avoid an additional loss of the mass in the main flow at the backwashing process, a storage space is provided in the screen carrier member which is filled in normal operation with cleaned melt. A piston in the storage space is shifted for moving the material provided in the storage space in the backwashing direction through the screen nest and into the washing channel.