초록 ▼

The filtering apparatus comprises at least one filtering material pleated in fanfold formation and arranged between the inflow or upstream side and the outflow or downstream side. Each pleat open toward the inflow or upstream side possesses a rounded base. The radius of the rounded base is in the ra

The filtering apparatus comprises at least one filtering material pleated in fanfold formation and arranged between the inflow or upstream side and the outflow or downstream side. Each pleat open toward the inflow or upstream side possesses a rounded base. The radius of the rounded base is in the range of 0.05 to 0.3 times the pleat depth. Each pleat open toward the outflow or downstream side terminates in an acute angle. A dimensionally stable insert is positioned within each pleat which is open toward the outflow or downstream side. The insert is preferably formed of flat material and comprises bilaterally protuberant deformations. The inserts are provided with bores at least at the protuberant deformations. Each of the inserts space the two confronting downstream sides of the associated filtering pleat and prevent that the filtering material, at high-pressure conditions, is pressed together and becomes impervious at the locations pressed against the inserts. In this filtering apparatus, filter cake consisting of filtered-out particles is easily separated and removed from the filtering material in a cleaning operation performed by a medium flowing from the outflow side to the inflow side of the filtering apparatus.

대표청구항 ▼

A filtering apparatus having an inflow side and an outflow side, comprising: at least one filtering material pleated in fanfold manner and arranged between the inflow side and the outflow side of the filtering apparatus; said at least one pleated filtering material containing a plurality of pleats w

A filtering apparatus having an inflow side and an outflow side, comprising: at least one filtering material pleated in fanfold manner and arranged between the inflow side and the outflow side of the filtering apparatus; said at least one pleated filtering material containing a plurality of pleats which are open towards said inflow side and a plurality of pleats which are open towards said outflow side; each pleat of said at least one pleated filtering material having a predetermined pleat depth; each one of said plurality of pleats which are open towards said inflow side containing a rounded base; said rounded base having a radius in the range of 0.05 to 0.3 times said predetermined pleat depth; each one of said plurality of pleats which are open towards said outflow side being structured to possess an acute angle; a dimensionally stable insert positioned within said each one of said plurality of pleats which are open towards said outflow side; each said dimensionally stable insert is formed of a substantially flat material comprising bilaterally protuberant deformations; and at least said bilaterally protuberant deformations being provided with holes.