Patent GB-701008-A (GB)
Title: Apparatus for coating tubular fabric and like narrow materials
IPC: B05D1/18
Filed: 1951-05-23
Abstract: 701,008. Coating tubular fabric. BENTLEYHARRIS MANUFACTURING CO. May 23, 1951 [May 31, 1950], No. 12045/51. Class 140 In an apparatus for applying a coating composition to a tubular fabric material there are provided means comprising a pair of vertically spaced-apart guide rolls 9, 10 to draw the fabric upwards with its axis disposed in a vertical position, and applicator 4 to contain the coating composition 5 positioned intermediate the guide rolls through which the fabric is drawn, and an inlet die 24 in the applicator of substantially the same diameter as the normal diameter of the fabric through which the fabric is drawn, a second die 26 disposed in the applicator co-axial with the inlet die having a diameter equal to the desired diameter of the fabric in the finished product through which the fabric is drawn, means defining a circular outlet opening in the applicator through which the fabric is withdrawn, the outlet opening being disposed in co-axial alignment with the die openings and having a predetermined greater diameter than the opening of the second die to control the thickness of the coating composition on the tubular fabric material, and means of adjustably mounting the applicator with the axes of the die and the outlet openings thereof disposed coincident with the axis of a fabric. As shown the fabric is passed through an applicator 4 filled with the liquid coating composition and maintained under a small pressure by a head of the coating composition in a head piece 22 via a lower die 24 having an opening 25 substantially of the same diameter as that of the tubular material, an intermediate die 26 having an opening 28 therein of a diameter smaller than the normal diameter of the tubular material, and an upper die 30 provided with an opening 31 co-axial with the openings 28, 25 and having a diameter slightly greater than the reduced diameter of the tubular material. In order to position the applicator 4 concentrically with the tubular fabric 1 it is supported by a positioning ring 36 having a plurality of bolts 37 threaded in the ring and bearing against the outer surface of the applicator. By changing the position of the bolts 37 with respect to the ring 36, the position of the applicator with respect to the tubular fabric may be adjusted so that the applicator is accurately aligned co-axially with respect to the axis of the tubular fabric and the heating unit 7. After the tubular fabric 1 leaves the applicator 4 and while the coating composition 6 thereon is still in liquid state, it is passed through the heating unit containing a plurality of heating lamps 38, which operate to flux, cure or dry the coating composition depending on its properties and thus form the finished wire covering 2. The heating unit 7 comprises inner and outer shells 40 and 41 respectively concentrically arranged in space relation with respect to each other and the coated fabric, the space between the shells 40 and 41 housing the lamps 38 with their end faces disposed in central openings 42 provided longitudinally and circumferentially in the inner shell 40. Specification 701,007 is referred to.