Abstract: A cylindrical element for filtering various substances and separating particles therefrom is shown wherein a wire is cylindrically wound in the form of a helix to form a helical slit between the adjoining peripheral margins of the wire thereby increasing to the maximum the area for filtering or separation treatment. The helical slit forms a linear treatment hole with improved filtering and separation deficiency. The cylindrically wound wire may be supported by actually extending support members having grooves therein or by cylindrically-shaped support members having openings of various sizes and shapes. An embodiment of the invention wherein the cylindrical element is mounted in a pipe is also shown.

Abstract: A wire with a definite cross-section is previously wound and bent in the form of a coil in a desired diameter to form a cylindrical body provided with slit holes in the form of a coil on the adjoining wound portions. One open end of the cylindrical body as obstructed as much or through in the intermediary of a core bar having a fluid passage, while the other open end thereof is secured to a hole-opening base whereby a small-sized fluid treatment element is obtained.

Abstract: A conical element for filerting various substance and separating particles wherein a wire is wound in the form of a helix to form a helical slit between the adjoining peripheral margins of the wire thereby producing a linear treatment opening and increasing the area for filtering or separation to the utmost to improve the filtering or separation efficiency.

Abstract: A flat element for filtering various substances and separating particles wherein a wire is planarly wound in the form of a vortex to form a vortical slit between the adjoining peripheral margins of the wire thereby increasing the area for filtering or separation treatment as so-called linear treatment holes to the utmost to improve the filtering or separation efficiency.

Abstract: A filter process and its device consist of a double filtration system, i.e. a superficial filtration by means of coating of a filter medium and a cubical filtration by forming a large number of recesses between adjacent wires to be wrapped up round a screw thread portion of a cylinder. The screw thread portion is formed on the outer circumference of the cylinder. The section of the wire is isosceles triangle and a summit of the wire is wrapped up round screw bottom of the screw thread portion.

Abstract: This invention relates to a wire locking structure for a filter device, in which an outer circumference of a cylinder body is provided with a screw thread portion. The screw thread portion is wrapped by a wire of isosceles triangle in section. An end of the wire is drawn into a recess and firmly supported in a U-shape by an insert member to be inserted in the recess, thereby a conventional welding means has been removed.

Abstract: This invention relates to a wire locking structure for a filter device, in which an outer circumference of a cylinder body is provided with a screw thread portion. The screw thread portion is wrapped by a wire of isosceles triangle in section. An end of the wire is drawn into a recess and firmly supported in a U-shape by an insert member to be inserted in the recess, thereby a conventional welding means has been removed.