Title of Invention

CONTINUOUS DYEING DEVICE AND PROCESS WITH INDIGO AND OTHER COLORANTS FOR WARP YARN CHAINS OR FABRICS

Abstract

Continuous dyeing device (100) and processes using indigo and/or other colorants for warp yarn chains and/or for fabrics (13) of the type equipped with at least one first (1) and one second (2) dyeing compartment containing dyeing baths (lla, lib, lie, lid) and in turn contained, at least partially, in a hermetically sealed chamber (20). The device (100) also presents at least one squeezing element (14) interposed between the two dyeing compartments (1,2) and three cylinders (3) to heat and/or dehydrate the yarn and/or the fabric (13) in order to increase the diffusion of the colorant and the absorption of the colorant itself. The cylinders (3) are positioned downstream of the first dyeing compartment (1) and the squeezing element (14).

Full Text

CLAIMS 1. Continuous dyeing device (100) using indigo and/or other colorants for the warp chain (13) and/or fabrics, of the type composed of at least a first (1) and a second (2) dyeing compartment adapted to contain dyeing baths ■ (lla, lib, lie, lid) , and contained, at least partially, in a hermetically sealed chamber (2 0) characterised in that it comprises at least one squeezing element (14) interposed between said at least two dyeing compartments (1, 2) and at least one means (3) for heating and/or dehydrating the yarn to increase the diffusion of the colorant in the fibre of the yarn and the absorption of the colorant in the yarn, located downstream of said first dyeing compartment (1) and said squeezing element (14). 2. Device according to claim 1 characterised in that said dyeing compartments (1, 2) comprise on their bottom, at least one means (17) for indirect heating or cooling and without contact, of the dyeing baths (lla, lib, lie, lid) contained in said compartments (1/ 2) . 3. Device according to claim 2 characterised in that said at least one means (17) for dye bath heating (lla, lib, lie, lid) forms a cavity in proximity to the bottom of said compartment and comprises at least one coil (27) in which circulates a heating or cooling fluid. 4. Device according to any one of the previous claims characterised in that said hermetically sealed chamber (2 0) comprises at least OUB base (21) and at least one hood (22) that can be raised from said base (21) for cleaning and maintenance interventions, and can be hermetically reclosed over said base (21) . 5. Device according to claim 4 characterised in that said hermetically sealed chamber (2 0) comprises two bases (21) and two hoods (22) that can be raised from said bases (21) for cleaning and maintenance interventions, and can be hermetically reclosed over said bases (21) . 6. Device (100) according to claims 4 or 5 characterised in that said hermetically sealed ' chamber (2 0) comprises hermetic sealing means (9). . 7. Device (100) according to claim 6 characterised in that said hermetic sealing means (9) comprise at least one gasket interposed between said at least one hood (22) and said at least one base (21) . 8. Device (100) according to claim 6 characterised in that said hermetic sealing means (9) comprise a hydraulic seal comprising at least one dividing wal 1 (7) for each compartment (1, 2,) ; said dividing wall (7) being immersed/ at least partially in the dyeing baths and being equipped on their upper part with a seat (8) adapted to be coupled with said at least one hood (22) to form the hermetic seal. 9. Device (100) according to any one of the previous claims characterised in that said squeezing element (14) is able to apply strong pressure within a range between 3 and 2 0 tons, on the warp chain (13) on exit from said compartment (1) . 10. Device (100) according to any one of the previous claims characterised in ■ that said means (3) for the heating and/or dehydration of the yarn (13) comprise at least one heatable cylinder (73) positioned between said squeezing element (14) and said second dyeing compartment (2) , over which passes the yarn (13) before it is immersed in the second dye bath (2) . 11. Device (100) according to any one of claims 1 to 9, characterised in that said means (3) for the heating and/or dehydration of the yarn comprise at least one infrared source adapted to heat said yarn (13) by direct irradiation. 12. Device (100) according to any one of the previous claims from 1 to 8, characterised in that said means (3) for the heating and/or dehydration of the yarn comprise at least one microwave or radio frequency source adapted to directly heat the yarn (13) downstream of said squeezing element (14) . 13. Device (10 0) according to any one of claims 1 to 9, characterised in that said means (3) for the heating and/or dehydration of the yarn (13) comprise at least one source for at least one flow of dehumidified hot fluid adapted to heat the yarn (13) . by convection. 14. Device according to any one of the previous claims characterised in that it comprises at least one second squeezing unit (15) positioned downstream of said second dyeing compartment (2). 15. Device according to any one of the previous claims characterised in that it comprises at least one intermediate squeezing unit (32) positioned over said first compartment (1) adapted to perform a squeezing action on said yarn (13) during the period that said yarn (13) remains in said first compartment (1) . 16. Device (100) according to any one of 'the previous claims characterised in that it comprises a plurality of guide rollers (2 9, 3 0, 31) for the yarn {13) inside said chamber (20) . 17. Device (100) according to any one of the previous claims characterised in that it comprises a closed fluid and steam suction circuit (4) to draw in the steam from said chamber (2 0) and to return the dehumidified fluid back into the interior of said chamber (20) . 18. Device (10 0) according to claim 17 characterised in that said closed fluid and steam suction circuit (4) comprises at least one valve element to discharge the drawn in steam from said chamber {20) towards the exterior. 19. Device (100) according to claims 17 and 18 characterised in that said closed suction circuit (4) comprises at least one steam suction means (40) adapted to draw in the steam from said chamber (20) and at least one heat exchanger (41) adapted to condense the water steam and to return' the dehumidified fluid to said chamber (20). 20. Device (100) according to any one of the previous claims characterised in that it comprises means (50) for the introduction of deoxygenated air and/or nitrogen into said chamber (20) and means (51) for expelling the oxygen from said chamber (2 0) in order to create an inert processing environment inside said chamber (2 0) . 21. Device (100) according to any one of the previous claims characterised in that said dyeing compartments (1) and (2) comprise at least one inlet (33a, 33b) and one outlet (34a, 34b) of the overflow type. 22. Device (100) according to any one of the previous claims characterised in that said dyeing compartment (1) has a larger yarn containment capacity than that of said compartment (2) . 23. Device (100) according to any one of the previous claims characterised in that said dyeing compartments (1/ 2) are able to operate with different baths. 24. Device (10 0) according to any one of the previous claims characterised in that said dyeing compartments (1, 2) vary the bath level at which they operate according to the dyeing process. 25. Continuous dyeing process (100) using indigo, for warp yarns (13) with the device (100) , according to- any one of the previous claims characterised in that it comprises the following stages: a) immersion of said yarn (13) in said first compartment (1) containing the dyeing bath; b) squeezing action at a pressure included in the range between 5 and 12 tons, on said yarn (13) on exit from the bath of said first compartment (1) ; c) direct heating of said yarn (13) to increase the diffusion of the colorant in the fibre and to dehydrate the yarn in order to increase the absorption of the colorant in the following compartment; d) immersion of said yarn (13) in the dyeing bath contained in said second compartment (2) ; e) second squeezing action on the yarn (13) on exit from said second compartment (2); f) yarn is subjected to oxidation. 26. Dyeing process according to claim 2 5 characterised in that the stages from a) to d) are performed in an inert environment. 27. Process according to claims 25 or 26, characterised in that before beginning the dyeing process, a flow of nitrogen and/or deoxygenated air is introduced into said chamber (20) for a period of time sufficient to obtain an inert environment inside said chamber (20). 28. Process according to claim 25 characterised in that during the stages from a) to d) the fluid, containing the steam that evaporates from the yarn is drawn in by said closed suction circuit (4) , the steam is condensed, and the dehumidified fluid is introduced back into the said chamber (20) . 29. Process according to any one of claims 25 to 28, characterised in that the dyeing baths (lla -lib) contained in the first compartment (1) are heated. 30. Process according to any one of claims 25 to 29, characterised in that the dyeing baths (lla, lib, lie, lid) contained in said first and second first compartments (1 -2) are heated or cooled. 31. Continuous dyeing process using sulphur colorant for warp chain (13} using the device (100) according to any one of the previous claims from 1 to 24 characterised in that it comprises the following stages: a) immersion of said yarn (13) in said first compartment (1) containing the dyeing bath with sulphur colorant; b) squeezing action with a pressure between 5 and 12 tons on said yarn (13) on exit from the bath in said first compartment (1) ; c) immersion of said yarn (13) in said second compartment (2) containing the dyeing bath with sulphur colorant; d) squeezing action on the yarn (13) on exit from said second compartment (2) ; e) the yarn is subjected to steaming action. 32. Process according to claim 31, characterised in that during stages from a) to c) the steam that evaporates from said yarn (13) is drawn in by said suction circuit (4) and discharged externally. 33. Continuous dyeing process using indanthrene colorant according to the pigmentation method for warp chains (13) using the device (100) according to any one of the previous claims from 1 to 23 characterised in that it comprises the following stages: a) immersion of said yarn (13) In said first compartment (1) containing the pigmentation bath with indanthrene colorant; b) squeezing action with a pressure between 5 and 12 tons on said yarn (13) on exit from the bath (11) in said first compartment (1); c) direct heating of said yarn (13) to dehydrate it in order to prevent hydrolisation of the following chemical bath in the second compartment (2) / d) immersion of said yarn (13) in the chemical bath (lid) contained in said second compartment (2) ; e) second squeezing of the yarn (13) on exit from the second compartment; f) the yarn (13) is subjected to steaming action. 34. Process accoi~ding to claim 33/ characterised in that during the stages from a) to d) the steam that evaporates from said yarn (13) is drawn in by said suction circuit (4) and discharged externally, 35. Process according to claim 34, characterised in that the pigmentation bath contained in said first compartment (1) is heated, and the bath (lid) in said second compartment (2) is cooled. 3 6. Continuous dyeing process using reactive colorants according to the two stage method for warp chains using the device 100 according to any one of the previous claims from 1 to 19 characterised in that it comprises the following stages: a) immersion of said yarn (13) in said first compartment (1) containing the pigmentation bath with reactive colorants; b) squeezing action with a pressure between 5 and 12 tons on said yarn (13) on exit from the bath in said first compartment (1) ; c) direct heating of the said yarn (13) to dehydrate it in order to prevent hydrolisation of the bath contained in the second compartment (2); d) immer.sion of the said yarn (13) in the saline alkaline bath contained in said second compartment (2); e) second squeezing of the yarn (13) on exit from the second compartment; f) the yarn is subjected to steaming action. 37. Process according to claim 36 characterised in that during the stages from a) to d) the steam that evaporates from said yarn (13) is drawn in by said suction circuit (4) and discharged externally. 38. Process according to claim 36 characterised in that the dyeing bath contained in said firsr compartment (1) is heated, and the bath in the second compartment (2) is cooled. 39. Process according to any one of the previous claims from 25 to 38 characterised in that the yarn is subjected to intermediate squeezing action at said first compartment (1) to facilitate the penetration of the colorant in the yarn and to make the colour more uniform. Dated this 29 day of January 2007

Documents:

387-CHENP-2007 AMENDED PAGES OF SPECIFICATION 27-11-2012.pdf

387-CHENP-2007 AMENDED CLAIMS 27-11-2012.pdf

387-CHENP-2007 AMENDED CLAIMS 31-05-2012.pdf

387-CHENP-2007 CORRESPONDENCE OTHERS 27-11-2012.pdf

387-CHENP-2007 CORRESPONDENCE OTHERS 12-12-2011.pdf

387-CHENP-2007 FORM-1 27-11-2012.pdf

387-CHENP-2007 OTHER PATENT DOCUMENT 31-05-2012.pdf

387-CHENP-2007 CORRESPONDENCE OTHERS 04-01-2012.pdf

387-CHENP-2007 EXAMINATION REPORT REPLY RECEIVED 31-05-2012.pdf

387-CHENP-2007 FORM-3 31-05-2012.pdf

387-CHENP-2007 POWER OF ATTORNEY 31-05-2012.pdf

387-chenp-2007-abstract.pdf

387-chenp-2007-claims.pdf

387-chenp-2007-correspondnece-others.pdf

387-chenp-2007-description(complete).pdf

387-chenp-2007-drawings.pdf

387-chenp-2007-form 1.pdf

387-chenp-2007-form 18.pdf

387-chenp-2007-form 3.pdf

387-chenp-2007-form 5.pdf

387-chenp-2007-pct.pdf