# US 9,752,263 B2 · Machine for the treatment of fabrics, nets, gauzes, felts, non-woven fabrics and other piece or sheet material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,263 B2 - Document ID: US9752263B2 - Status: Granted - Kind: B2 - Application number: 14/241,828 - Filed: 2012-08-14 - Published: 2014-07-31 - Granted: 2017-09-05 - Earliest claimed: 2011-08-29 - Assignees: MCS Officina Meccanica S.p.A. - Applicants: Emanuele Crotta - Inventors: Emanuele Crotta - Web page: https://patentgrep.com/patent/US9752263B2 ## CPC - D06B 3/28: of fabrics propelled by, or with the aid of, jets of the treating material - D06B 23/00: Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00 - D06B 23/04: Carriers or supports for textile materials to be treated - D06B 23/20: Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation - F04D 29/708: {specially for liquid pumps} - D06B: TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS (mechanical treatment of natural fibrous or filamentary material to obtain fibres or filaments D01B) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract The machine (1) for the treatment of fabrics according to the invention comprises a treatment tank (3) arranged for containing the fabric or other material to be treated (TC) and a treatment liquid. The head losses that the treatment liquid undergoes along the different collecting ducts (37A, 37B) between the treatment tank (3) and the relative entry nozzle (370A, 370B) in the collector (39) mutually differ at most of ±10% of the losses themselves. The head losses that the treatment liquid undergoes between each entry nozzle (370A, 370B) in the collector (39) and the entry (410) in the chamber (41) of the pump impeller differ at most of ±10% between the various entry nozzles (370A, 370B). The level of liquid on the bottom of the tank (3) is more even, and it is thus possible to make the machine (30) work with very low bath levels. ## Claims ### Claim 1 A machine (1) for the treatment of fabrics, nets, gauzes, felts, non-woven fabrics and other piece or sheet material, comprising: A treatment tank (3) arranged for containing the fabric or other material (TC) to be treated and a treatment liquid; a recirculation system arranged for collecting the treatment liquid still contacted by the fabric or other material to be treated in the treatment tank (3), wherein the recirculation system comprises: a recirculation pump (11′) arranged for pumping the treatment liquid towards the treatment tank (3) wherein said recirculation pump (11′) comprises a centrifugal impeller (396) arranged for rotating around a rotary axis (AR) which, during its normal operation, is substantially vertical; a plurality of collecting ducts (37A, 37B), each of them arranged for taking the treatment liquid out the treatment tank (3) and bringing it to a collector (39) feeding the recirculation pump (11′), wherein the recirculation system is so provide that: Each collecting duct (37A, 37B) enters the collector (39) at a corresponding entry nozzle (370A, 370B); All collecting ducts (37A, 37B) mutually feed in parallel the collector (39); the head losses which the treatment liquid undergoes along the various collecting ducts (37A, 37B) between the treatment tank (3) and the corresponding entry nozzle (370A, 370B) in the collector (39) mutually differ at most of ±10% of the losses themselves; the head losses which the treatment liquid undergoes between each entry nozzle (370A, 370B) in the collector (39) and the entry (410) in the chamber (41) of the pump impeller differ at most of +10% among the various entry nozzles (370A, 370B). ### Claim 2 (depends on 1) The machine (1) according to claim 1, wherein: the head losses which the treatment liquid undergoes along the various collecting ducts (37A, 37B) between the treatment tank (3) and the corresponding entry nozzle (370A, 370B) in the collector (39) mutually differ at most of ±5% of the losses themselves; the head losses which the treatment liquid undergoes among each entry nozzle (370A, 370B) in the collector (39) and the entry (410) in the chamber (41) of the pump impeller differ at most of ±5% among the various entry nozzles (370A, 370B). ### Claim 3 (depends on 1) The machine (1) according to claim 1, wherein the collecting ducts (37A, 37B) are substantially symmetrical at least with respect to a vertical symmetry plane (VIII-VIII). ### Claim 4 (depends on 1) The machine (1) according to claim 1, wherein the collector (39) is substantially symmetrical at least with respect to a vertical symmetry plane (VIII-VIII). ### Claim 5 (depends on 1) The machine (1) according to claim 1, wherein the recirculation pump (11′) comprises a centrifugal impeller (396) and a priming propeller (397), wherein: the centrifugal impeller (396) and the priming propeller (397) are arranged for pressing the treatment liquid downwards by rotating around a common rotary axis (AR), are mounted on the same drive shaft which actuates said centrifugal impeller (396) and said priming propeller (397) and the priming propeller (397) is mounted upstream with respect to the centrifugal impeller (396). ### Claim 6 (depends on 5) The machine (1) according to claim 5, wherein the priming propeller (396) is arranged for pressing the treatment liquid towards the centrifugal impeller (397) even when the latter is not submerged by the treatment liquid whereas the priming propeller (396) is submerged by the treatment liquid. ### Claim 7 (depends on 5) The machine (1) according to claim 5, comprising a priming duct (394) at least enclosing the priming propeller (396) and is arranged for collecting around it the treatment liquid aspired by the propeller itself. ### Claim 8 (depends on 1) The machine (1) according to claim 1, wherein the recirculation pump (11′) is a turbopump with a radial discharge. ### Claim 9 (depends on 5) The machine (1) according to claim 5, wherein said centrifugal impeller (396) during its normal operation is placed substantially underneath or in any case lower than the treatment tank (3). ### Claim 10 (depends on 1) The machine (1) according to claim 1, comprising a drive system (33) arranged for advancing the fabric of other rope material (TC) to be treated along a suitable path inside the machine (1) itself and inside the treatment tank (3). ### Claim 11 (depends on 1) The machine (1) according to claim 1, wherein the drive system (33) comprises a roll or reel external to the treatment tank (3) and arranged for extracting the fabric or other rope material (TC) to be treated from the tank (3). ### Claim 12 (depends on 1) The machine (1) according to claim 1, wherein the recirculation system comprises one or more nozzles (35) arranged for spraying on the fabric or other rope material (TC) to be treated the treatment fluid coming from the recirculation pump, possibly by spraying it upon a portion of fabric or other rope material (TC) to be treated, placed outside the treatment tank (3).