US 12,440,784 B2
Filter plate subframe
Mirva Mustakangas, Pirkkala (FI); Ismo Juvonen, Rauha (FI); Janne Kaipainen, Halsua (FI); Teemu Eloranta, Luumaki (FI); Mika Illi, Vantaa (FI); and Kari Vanttinen, Espoo (FI)
Assigned to Metso Finland Oy, Espoo (FI)
Appl. No. 18/251,327
Filed by Metso Outotec Finland Oy, Tampere (FI)
PCT Filed Nov. 6, 2020, PCT No. PCT/FI2020/050737
§ 371(c)(1), (2) Date May 1, 2023,
PCT Pub. No. WO2022/096771, PCT Pub. Date May 12, 2022.
Prior Publication US 2024/0009597 A1, Jan. 11, 2024
Int. Cl. B01D 25/21 (2006.01)
CPC B01D 25/215 (2013.01) [B01D 2201/342 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A filter plate subframe for a filter plate frame assembly having a filter plate frame and a filter plate subframe receivable therein,
wherein the subframe comprises separate periphery segments attached to each other so as to form a continuous periphery region of the subframe, such that the periphery region surrounds and delimits an open region of the subframe,
wherein the periphery region is of a generally rectangular shape having:
a first flank side and an opposite second flank side parallel with the first flank side, the flank sides running along a longitudinal direction of the subframe, and
a first end side and an opposite second end side parallel with the first end side, the end sides being transverse to the flank sides,
wherein the flank sides have a linear density lower than that of the end sides, and the end sides have a bending stiffness higher than that of the flank sides,
wherein either or both of the first end side and the second end side are provided with a reinforcement bar for increasing the bending stiffness said end sides,
wherein the subframe is configured to be slidably receivable within a filter plate frame along the longitudinal direction of the subframe, and
wherein a supporting surface is provided on a first planar side of periphery segments forming the flank sides the supporting surface being configured to support the filter plate subframe on a corresponding receiving surface of an associated filter plate frame.