Patent GB-1109686-A (GB)
Title: Apparatus for finishing fibrous material
IPC: D06P1/44
Filed: 1965-06-03
Abstract: 1,109,686. Textile treating apparatus. BOWE BOHLER & WEBER KOMM GES MASCHINENFABRIK and ROBT. SCHWARZENBACH & CO. 3 June, 1965 [4 June, 1964], No. 23787/65. Heading D1L. Apparatus for finishing textile material e.g. impregnating with a volatile solvent comprises padding rollers for impregnating the material with solvent, a transport device provided with calenders, rollers or the like through which the web-like material is passed in loop form in alternating directions several adjoining chambers connected to the impregnating device, partitions of each of the chambers enclosing a section where the material is led substantially in a straight line, an air circulating system comprising a fan, a cooler and an air heater the suction side of said fan being connected to a chamber adjoining the impregnating device near where the material enters the chamber and the pressure side of said fan .being connected, via the cooler and the heater, to one of the following chambers near where the material leaves the chamber there being at least one additional chamber, following the said last mentioned chamber and having a further air circulating system provided with a fan and an active carbon plant or a similar air purifying means. As shown material 1 travels through treating means 2 consisting of a treating liquid trough 3 and padding rollers 4, enters a chamber 5 and is then guided through further adjoining chambers 7, 8, 9. An air circulating and solvent recovery system consisting of a fan 12, a cooler 13 and heater 14 is connected to withdraw air from chamber 5 from the material inlet thereof and to feed air into chamber 8 near the material exit thereof, such that air flows in a counter direction to the movement of the material. A secondary air circuit may also be provided for each of chambers 5, 7, 8 (only that for chamber 5 being shown) and may consist of a fan 17, heater 18 and air jets 21 situated on both side of the material passage through the chamber. To maintain a desired aqueous concentration of air in this secondary circuit, valves 23, 23' for injecting steam or water into the circuit are provided and are under the control of a hygrometer 22 in duct 19. A separate air circulatory system is connected to the chamber 9 and consists of a fan 26 and an activated carbon plant 25 and the chamber 2 may also be connected to the carbon plant via suction duct 29. In a further embodiment (Fig. 2, not shown) the first reaction chamber is disposed beneath the padding rollers and has its own air circulating and solvent recovery means including a fan, a cooler and a heater togather with water spray or steam inlets and chemical injection: devices controlled by means for maintaining constant temperature and solvent vapour concentration in the chamber. A pre-treatment zone may also be provided in which zone the material is passed in looped form through an atmosphere encircled with vapour (Figs. 3 and 4, not shown). The through speed of the material may be regulated in dependence of the solvent vapour concentration in one of the chambers. for example by a vapour concentration meas- -wing device 54. or in dependence of the solvent content of the material itself, for example by a device 55 measuring the residual solvent contained in the material 1 issuing from chamber 9. The various guide rollers may be provided with heating means and infra-red heaters in the chambers and/or ultrasonic vibrators may be provided for the material, to aid the reaction of the material with the treating means.