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OwnerChristian Monjarretinventor
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The invention concerns a screening method and machine for size sorting in a fluid (9), into two categories, of materials with different volumes and density close to that of the fluid used after total immersion in said fluid. Mechanical stirring (6) means upstream of the sieves, optionally combined with the use of surfactants in an aqueous medium, maintain said materials to be size-sorted suspended in said fluid. The fluid circulates from upstream to downstream of the sieves. Only the materials below a certain size, volume or weight, maintained suspended in the fluid, pass through the size-sorting sieves (15). The sieves are immersed in the fluid and do not slow down the liquid flow passing through them. To obtain further size-sorted categories, it is possible to organise the inventive process sequentially. The invention is useful in poultry processing plants, processing feathers and down for padding purposes, purifying foreign matter in pasty mixtures and the like.
1) Method of sizing bird feathers, wood needles or similar materials by means of fluid which densities after full immersion are close to that of said fluid or even less characterized by the fact it consists on one hand to realize in a sealed enclosure (2) upstream of said fluid to keep suspended said materials in said fluid and to bring them toward screening means (3,4,5), a circular mixing of said fluid to keep suspended said materials (8) in said fluid and to bring them toward means of screening (3,4,5) and on the other and by the fact the fluid is kept flowing continuously through means of screening to run the materials (8) to select.
4) Machine in accordance with any of the previous claim characterized by the fact it comprises a sealed enclosure (2) surrounding a mixing enclosure (1) in a cylindrical or polygonal shape which is supplied with fluid, said mixing enclosure (1) having screening means (3,4,5) intended to run only the materials to select under the effect of the fluid which is kept flowing continuously from said mixing enclosure (1) toward sealed enclosure (2) which has a drain (7) of said fluid and materials selected.
Dependencies are inferred from the claim text.