Patent GB-848537-A (GB)
Title: Improvements in machines for the continuous treatment of fabrics in web form
IPC: D06B3/10
Filed: 1959-01-06
Abstract: <PICT:0848537/IV (c)/1> <PICT:0848537/IV (c)/2> <PICT:0848537/IV (c)/3> <PICT:0848537/IV (c)/4> The apparatus described and claimed in the parent Specification, in which fabric is caused to travel through a vat containing a treating liquid, as it is arranged in successive folds, each suspended on a rod conveniently conveyed through the vat by suitable means, and in which the fabric is supplied to the vat at the top through an elongated opening provided in the bottom of a supply receptacle and is accompanied by a stream of the treating liquid falling together with the fabric from the supply receptacle to the vat containing the treating liquid, means being provided to vary the cross-sectional area of the outlet opening from the supply receptacle so as to restrict it in proximity to its longitudinal central plane and confer to the lamina of treating liquid accompanying the fabric a cross-sectional shape diverging towards the ends with a view to obtaining on issue from the supply receptacle an action by the liquid on the fabric capable of fully stretching the latter and preventing the formation of folds along the weft of the fabric, is modified in that means are provided to vary the cross-sectional area of the outlet opening for the fabric from the supply receptacle to the vat containing the treating liquid simultaneously throughout the length of the opening, independently of the action of means adapted to vary the cross-sectional area of the opening to restrict it in proximity to its longitudinal central plane.  The apparatus may be characterized in that the outlet opening cut at the bottom of the supply receptacle is formed between the lower edges of inclined longitudinal walls 8, 9 of an elongated funnel connected with the interior of supply receptacle 4, the funnel having at its opposite ends two vertical cross walls 108, 109 parallel with each other secured to the bottom of supply receptacle 4, the longitudinal wall 8 being resilient, secured to the bottom of the supply receptacle and cross walls and connected with means acting in proximity to the longitudinal central plane thereof in order to draw its central portion towards or away from the other longitudinal funnel wall 9 mounted for displacement parallel with itself and the other funnel walls.  Wall 9 may be supported on shafts 31 parallel with one another mounted for rotation in stationary supports securedly fixed to the bottom of receptacle 4, shafts 31 being provided at one end with a screw thread 31a adapted to engage with a cooperating screw thread in a sleeve 28 securedly fixed to the structure of the displaceable longitudinal wall of the funnel 9, carrying at its ends means for operating simultaneously with shafts, e.g. a worm wheel 135 keyed to the end of shafts 31, remote from the screw threaded end, and worm screws 36 keyed to a common shaft 37 arranged parallel with walls 8, 9 of the funnel and provided with a controlling hand wheel 38.  Shaft 37 may carry at one end a crank with a screw thread 39 co-operating with a nut 40 mounted for displacement along the axis of the shaft and provided with a pointer 41 arranged in front of a graduated scale 42 to indicate the position of wall 9.  Resilient longitudinal wall 8 may be attached at its longitudinal central plane to a V-shaped fork, the arms 19 of which are formed with longitudinal grooves 19a entered by coaxial pins extending from both sides of a nut co-operating with the screw threaded end of an inclined shaft 25 approximately parallel with wall 8 and provided at the top with a control handle 25a.  Wall 9 of the funnel may be associated with a structure in the form of a slide open at the bottom.