초록 ▼

A filter insert (1A) for a fluid filter with an outer square or hollow cylindrical shape has a plurality of continuous zigzag folded walls (5) made of a fluid-permeable material (2) and provided in the plane of at least part of the folded walls with stiffening embossed depressions (3) and/or project

A filter insert (1A) for a fluid filter with an outer square or hollow cylindrical shape has a plurality of continuous zigzag folded walls (5) made of a fluid-permeable material (2) and provided in the plane of at least part of the folded walls with stiffening embossed depressions (3) and/or projections for keeping the walls folded. The depressions and/or projections of adjacent folded walls are interconnected at least in part and supported on each other. Stiff spacers are provided between the depressions or projections in at least part of their length for interconnecting them and supporting them on each other.

대표청구항 ▼

[ I claim:] [1.] A filter insert for a fluid filter, comprising:a material permeable to fluid and having a number of planar fold walls arranged in a substantially continuous zigzag shape and including depressions and/or elevations stamped into the plane of at least a part of a respective one of the

[ I claim:] [1.] A filter insert for a fluid filter, comprising:a material permeable to fluid and having a number of planar fold walls arranged in a substantially continuous zigzag shape and including depressions and/or elevations stamped into the plane of at least a part of a respective one of the fold walls in order to stiffen the fold walls, wherein the depressions and/or elevations each have a face with a longitudinal extent and two side walls, and adjacent fold walls connected at a common fold edge define a fold;a spacing between the longitudinal faces of the depressions and/or elevations of adjacent fold walls, said spacing having a thickness greater than that of the permeable material; andrigid spacers being placed in said spacing and joining a part of the longitudinal extent of the depressions and/or elevations of adjacent fold walls to achieve the spacing between the longitudinal faces of the depressions and/or elevations of adjacent fold walls.