Produits et 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.

Produits et services

PVC junctions for pipes.

Abrégé

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.

Classes IPC  ?

• B01D 29/33 - Éléments filtrants autoportants agencés pour la filtration à courant dirigé vers l'intérieur
• B01D 33/27 - Filtres avec éléments filtrants mobiles au cours de l'opération de filtration avec des surfaces filtrantes rotatives ni cylindriques ni planes, p. ex. surfaces hélicoïdales
• D21D 5/16 - Cylindres et platines pour épurateurs
• B01D 29/44 - Éléments filtrants à arêtes, c.-à-d. utilisant des surfaces imperméables adjacentes

Abrégé

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.

Classes IPC  ?

• B01D 33/27 - Filtres avec éléments filtrants mobiles au cours de l'opération de filtration avec des surfaces filtrantes rotatives ni cylindriques ni planes, p. ex. surfaces hélicoïdales
• D21D 5/16 - Cylindres et platines pour épurateurs

Abrégé

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).

Classes IPC  ?

• D21B 1/32 - Triturage par d'autres moyens de vieux papiers
• D21F 1/70 - Prise de la pâte, élimination de l'eau ou sa récupérationRéutilisation des eaux blanches par flottation