US 12,447,422 B2
Filter diaphragm for a recessed plate-type filter, a diaphragm filter plate, a diaphragm filter plate assembly and a recessed plate-type filter
Teppo Suutari, Heituinlahti (FI)
Assigned to METSO FINLAND OY, Espoo (FI)
Appl. No. 17/797,018
Filed by Metso Outotec Finland Oy, Tampere (FI)
PCT Filed Feb. 7, 2020, PCT No. PCT/FI2020/050076
§ 371(c)(1), (2) Date Aug. 2, 2022,
PCT Pub. No. WO2021/156536, PCT Pub. Date Aug. 12, 2021.
Prior Publication US 2023/0064222 A1, Mar. 2, 2023
Int. Cl. B01D 25/21 (2006.01); B01D 25/164 (2006.01); B01D 25/28 (2006.01)
CPC B01D 25/285 (2013.01) [B01D 25/164 (2013.01); B01D 25/215 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter diaphragm for a filter plate assembly of a recessed plate-type filter, such as a filter press or a tower press, comprising:
a sheet-like body having a flexible structure; and
at least on a side of the body, a plurality of distinct attachment studs to be inserted into corresponding distinct attachment holes of a respective filter plate for attaching the diaphragm to the filter plate,
wherein the attachment studs are arranged along a sealing region extending along a periphery of the filter diaphragm, the sealing region being formed as a bead at least partly surrounding the remaining portion of the diaphragm body,
wherein the attachment studs extend in a direction perpendicular to the diaphragm body, and
wherein the attachment studs are equipped with an opening extending through the filter diaphragm, between the opposing sides thereof.