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US 12,263,421 B2Granted
Method and apparatus for producing a filter device
AssigneeRobert Bosch GmbH
InventorsRichard Dusak, Zdenek Uhlir, Alberto Castillo Rueda, Jan Mueldner
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AssigneeRobert Bosch GmbH
InventorsRichard Dusak, Zdenek Uhlir, Alberto Castillo Rueda, Jan Mueldner
Estimating the term…
The invention relates to a method for producing a filter device (1) for filtering a hydrophilic liquid, comprising a flat filter element (10) which is permeable to the liquid, wherein the filter element (10) has a delimited filter region (11) which is coated with a hydrophobic agent. The following steps are carried out: a) providing the flat filter element (10) which has in particular a nonwoven filter web (13) lying between a mesh support layer (14) and a spun-bonded fabric (15), b) producing a compressed annular boundary region (16) for the filter region (11), c) applying the agent onto the filter region (11) of the filter element (10), and d) obtaining the filter device (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:
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).
Dependencies are inferred from the claim text.