FILTER MEDIUM Russian patent published in 1995 - IPC

FIELD: decontaminating fluids. SUBSTANCE: filter medium has the form of thread sets. Each set has its threads arranged parallel to and spaced from each other at a distance exceeding the tread thickness. One set has its threads forming an angle with the treads of the preceding set. Each succeeding set of threads is positioned above the preceding set, the total amount of sets being at least two. The angle defined between each of the preceding and succeeding sets is variable. The sets having unidirected threads are offset relative to each other. Each succeeding pair of sets has its threads defining a first angle, each preceding pair of sets has its threads defining a second angle, the first angle being less than the second one. Each thread is comprised of separate filaments. Each succeeding thread set is positioned to be capable of contacting at least two preceding thread set. Each set has its threads spaced at a distance equal to at least double thread's thickness. EFFECT: improved quality of filtering. 6 cl, 4 dwg