Goods & Services

Non-metal pipe couplings and joints; Pipe fittings comprised primarily of plastic; Valves made of rubber materials; Valves of synthetic rubber. Valves, non-metallic; Butterfly valves (non-metallic -) [other than parts of machines]; Water-pipe valves of plastic; Drain traps [valves] of plastic.

Goods & Services

PVC junctions for pipes.

Abstract

The invention concerns a filtering drum (1) for fibre suspensions in water, comprising a plurality of shaped bars (2; 11, 13) with mainly longitudinal development, arranged side by side in order to define a tubular structure having substantially circular cross section, with the inner lateral surface (4) covered by a plurality of slits (3) that create a filtering surface, two or more annular elements (15) coaxial with one another and spaced according to the longitudinal axis (X) defined by the tubular structure, coupled through contact outside the shaped bars (2; 11, 13), wherein the shaped bars (2; 11, 13) are arranged according to a helical pattern.

IPC Classes  ?

• B01D 29/33 - Self-supporting filtering elements arranged for inward flow filtration
• B01D 33/27 - Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
• D21D 5/16 - Cylinders and plates for screens
• B01D 29/44 - Edge filtering elements, i.e. using contiguous impervious surfaces

Abstract

The invention is a filtering basket (1; 100) for fibres in water dispersion, comprising a plurality of profiled bars (2, 3; 103) arranged side by side to define a tubular structure with the inner lateral surface provided with a plurality of longitudinal slots (F) that define a filtering surface; two or more annular elements (8) coaxial to one another and spaced from one another, coupled by interference outside the profiled bars (2, 3; 103). The profiled bars (2, 3; 103) comprise a plurality of main bars (2), each one of which is provided with a shaped edge (4) whose cross-section is in the form of a trapezium and has the long side (4a) facing towards the inside of the basket (1; 100) and a plurality of secundary bars (3, 103), each one of which is provided with a shaped edge (5) whose cross-section is curved, with the convex part facing towards the inside of the basket.

IPC Classes  ?

• B01D 33/27 - Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
• D21D 5/16 - Cylinders and plates for screens

Abstract

The invention concerns a flotation cell (1; 30) for purifying fibrous suspensions through the dispersion of air microbubbles (22), comprising: a container (2; 31); feed pipes (4; 34) for conveying the suspension (3) into the container (2; 31); means (5; 35) for intercepting the purified suspension; means (6) for extracting the purified suspension; means (7) for discharging the foams created by the impurities contained in the suspension (3); rotary vanes (19; 36) arranged inside the container (2; 31). The cell (1; 30) comprises air dispersers (10; 32; 42) for generating air microbubbles (22) and dispersing them in the suspension (3), in each one of which it is possible to identify one rotor (11; 45) with axial flow associated with driving means (12; 47) and one duct (13; 40; 46) for conveying external air at the level of the rotor (11; 45).

IPC Classes  ?

• D21B 1/32 - Defibrating by other means of waste paper
• D21F 1/70 - Pulp catching, de-watering, or recoveringRe-use of pulp-water by flotation