US 12,263,421 B2
Method and apparatus for producing a filter device
Richard Dusak, Libin (CZ); Zdenek Uhlir, Trebic (CZ); Alberto Castillo Rueda, Aranjuez (ES); and Jan Mueldner, Ceske Budejovice (CZ)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/251,288
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Oct. 20, 2021, PCT No. PCT/EP2021/079022
§ 371(c)(1), (2) Date May 1, 2023,
PCT Pub. No. WO2022/090007, PCT Pub. Date May 5, 2022.
Claims priority of application No. 10 2020 213 744.7 (DE), filed on Nov. 2, 2020; and application No. 10 2021 211 780.5 (DE), filed on Oct. 19, 2021.
Prior Publication US 2023/0405497 A1, Dec. 21, 2023
Int. Cl. B01D 39/14 (2006.01); B01D 29/01 (2006.01); B01D 29/05 (2006.01); B01D 35/027 (2006.01); B01D 39/16 (2006.01)
CPC B01D 29/012 (2013.01) [B01D 29/05 (2013.01); B01D 39/14 (2013.01); B01D 35/027 (2013.01); B01D 2239/0428 (2013.01); B01D 2239/0627 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/0672 (2013.01); B01D 2239/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for producing a filter device (1) for filtering a hydrophilic liquid, the filter device comprising a flat filter element (10) which is permeable to the hydrophilic liquid, wherein the filter element (10) has a delimited filter region (11) which is coated with a hydrophobic agent, the method comprising:
providing the flat filter element (10),
producing a compressed annular boundary region (16) for the filter region (11),
applying the hydrophobic agent onto the filter region (11) of the filter element (10), and
obtaining the filter device (1).
 
13. An apparatus (18) for producing a filter device (1) for filtering a hydrophilic liquid, wherein the filter device (1) comprises a flat filter element (10), which is permeable to liquid, wherein the filter element (10) is equipped with a hydrophobic agent in a delimited filter region (11), wherein the apparatus includes a device for generating an annular boundary region (16) enclosing the filter region (11), as well as a device for applying the hydrophobic agent onto the filter region (11).