US 12,263,420 B2
Filter cartridge
Tobias Schuler, Dreieich (DE); and Bernd Freystedt, Wiesbaden (DE)
Assigned to BRITA SE, Taunusstein (DE)
Appl. No. 17/775,068
Filed by BRITA SE, Taunusstein (DE)
PCT Filed Sep. 22, 2020, PCT No. PCT/EP2020/076394
§ 371(c)(1), (2) Date May 6, 2022,
PCT Pub. No. WO2021/104708, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 19211605 (EP), filed on Nov. 26, 2019.
Prior Publication US 2022/0387910 A1, Dec. 8, 2022
Int. Cl. B01D 27/00 (2006.01); B01D 27/02 (2006.01); B01D 27/08 (2006.01); C02F 1/00 (2023.01)
CPC B01D 27/005 (2013.01) [B01D 27/02 (2013.01); B01D 27/08 (2013.01); C02F 1/003 (2013.01); B01D 2201/293 (2013.01); C02F 2201/003 (2013.01); C02F 2201/006 (2013.01); C02F 2307/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for manufacturing a gravity-based filter cartridge, comprising the following steps:
forming a cup-shaped upper part having a main axis X, a first rim at a first axial end, a hole-free section at a second axial end, and at least one water inlet between the hole-free section and the first rim, wherein the hole-free section comprises a support to which the mesh material is fixated at a distance to an end wall along the main axis X, wherein the support is a pin extending from the end wall along the main axis X towards the first axial end, wherein the pin has a length L of at least 5 mm,
drawing a mesh material over the first rim,
pushing the mesh material into the cup-shaped upper part towards the hole-free section, thereby forming a dome-shaped mesh,
fixating the mesh material along a closed path to the first rim,
fixating the mesh material radially inwards of the closed path to the hole-free section,
cutting the mesh from the mesh material along a path radially outward of the closed path,
forming a cup-shaped lower part having a second rim and at least one water outlet,
inserting filter media into the lower part, and
mounting the upper part onto the lower part with the second rim contacting the first rim.