Patent ID: 6073368
Filing Date: 2000-06-13
Classification: D06C,F26B

Abstract:
A drying and/or fixing device for the treatment of a textile material web (1), wherein the textile material web (1) lies in a treatment plane (E) and is transported in its longitudinal direction (2) in the broad-stretched condition through at least one treatment field (5), the latter being symmetric with respect to a center line (4) extending parallel with the longitudinal direction (2), and which is subjected in said treatment field to a blowing treatment with a treatment gas (17) comprising:at least one blowbox (8, 9) disposed within the treatment field (5), said blowbox (8, 9) having a blowbox inlet (16) and a blowing side (7) facing the material web (1), wherein said blowbox extends over the width (B) of the treatment field (5) when viewed transversely to the longitudinal direction (2);a plurality of blowing nozzles (6) defining the blowbox outlet for the treatment gas (17) located on said blowing side (7), said blowing nozzles (6) being directed at the material web (1);a plurality of return flow ducts (43, 45) for the treatment gas wherein said return flow ducts (43, 45) lead from the treatment plane (E) through the blowbox (8, 9) and to the back side (32) of said blowbox, said back side being disposed opposite said blowing side (7);a ventilator (13) having a pressure side (12) and a suction side (21);a pressure box (14), attached to said pressure side (12) of said ventilator (13), located along one longitudinal side of the device, wherein said pressure box is connected upstream of said blowbox (8, 9) on the longitudinal edge (10 or 11) of the treatment field (5) to the blowbox inlet (16);a flow return chamber (R) for the treatment gas (18), said return flow chamber beginning at said back side (32) of said blowbox and leading to an inlet (19) of a suction box (22) wherein said suction box (22) is connected to said suction side (21) of said ventilator (13), so that the treatment gas flows, within the blowbox (8, 9), from said blowbox inlet (16) to its outlet (6, 7), such flow normally taking place parallel with the treatment plane (E), and is reversed only in the blowing nozzles (6) and directed at the treatment plane (E), such reversal taking place in the zone of the individual blowbox outlets; said return flow path of the treatment gas (18) flowing off through the return flow ducts (43, 45); anda flow guide means (31) for splitting the return flow path (18) in the return flow chamber (R).