Patent GB-369880-A (GB)
Title: Improvements in or relating to the treatment of artificial silk
IPC: D01D10/04
Filed: 1931-04-07
Abstract: Apparatus for treating artificial silk cakes with liquids comprises in combination a trough to which liquid is supplied under pressure; a closure for the trough in the form of a perforated base upon which columns of cakes, with separating members between individual cakes, can be arranged; a framework structure having sides which are open to the atmosphere to permit entry of air and are arranged to support the outer columns of cakes, the framework structure being detachably connected to the closure for the trough; a counterbalanced board adapted to rest on the top of the cake columns, and means for applying a predetermined pressure to the board.  The pressure may be applied by interchangeable weights or by screws.  As shown in the drawings, a number of cakes are superposed in column formation, with a separating member 10 between each two cakes in a column, in a receptacle 18 comprising a perforated base 19 of resistant material such as metal lined with ebonite, and vertical side and end walls 20. The base 19 is bolted to a trough 24 arranged <PICT:0369880/IV/1> <PICT:0369880/IV/2> <PICT:0369880/IV/3> beneath it, and a framework structure 25 preferably made of wood impregnated with paraffin wax is mounted on the flanges 21 of the walls 20 and secured by bolts 27. The structure 25 comprises a number of vertical bars 26 spaced around the receptacle and arranged to support the outer columns of cakes 17 in an upright position.  Preferably one or more sides of the framework 25 is hinged to open like a gate, or is arranged like a sliding door so as to afford easy access to the cakes.  When the cake columns are assembled in the structure 25, they are subjected to compression by means of a board 28 and a number of interchangeable weights 29. The board is counterbalanced by weights 30.  Instead of the weights 29, screw devices may be provided for applying pressure to the board 28.  The cake separating members 10 are slightly less in depth than the cakes they support so that when the load is applied, each cake is compressed.  The separating members as shown in Fig. 5 may be made of sheet aluminium and have an annular base 11 with a skirt portion 12 and a perforated conical portion 13 upstanding from its inner edge.  The wall 13 extends into the interior of the cake but is of smaller diameter than that of the bore of the cake so as to leave a space for the free access of fluids to the cake.  If desired the part 13 may be made cylindrical and the separating member may be made of steel lined with ebonite, or of porcelain, "Bakelite," rubber, or an absorbent material of a textile nature.  Holes 16 in the base portion of the separating members may be provided for drainage of liquid collecting in the spaces between the walls 13 and the cakes.  The bottom 35 of the trough 24 slopes downwards to the inlet 32 to facilitate draining before changing the treating liquid. After passage through the cakes, the liquids may be drained off through a pipe 34 and if desired may be returned to the supply tanks. Specifications 297,118, 319,766, [both in Class 2 (ii), Cellulose &c.], and 369,675 are referred to.