Patent GB-362727-A (GB)
Title: Improved method of dehydrating and shaping artificial silk spinning cakes deformed in washing or other wet treatment process
IPC: D01D10/04
Filed: 1931-01-13
Abstract: Artificial silk cakes, which have been washed or otherwise subsequently treated outside the spinning cans and thus become deformed, are introduced in a coaxial position into conveniently perforated rotation vessels such as spinning cans adapted approximately to the outer periphery of the cakes, and are centrifuged therein.  The cakes thus recover their circular shape. They may be completely dried in the centrifuges by the introduction of warm air, or drying may be completed after they have been placed on drying bars, preferably in a plurality of stages, The cakes become more consolidated after removal of most of the water by centrifuging and are not deformed again when the drying is completed on drying bars.  Preferably, the cakes are wrapped up in woven or net-like coverings and are centrifuged and dried in this condition.  Tubular knitted fabrics of artificial silk or mixed threads may be used for covering the cakes.  The tubular fabric may be inserted through the cake and the ends turned over the exterior of the cake, or it may be drawn over the cake and the ends turned inwards through the interior of the cake. The process is applicable for the removal of water, soap solutions, oil emulsions, reviving straightening and dyeing liquids, and other liquids which will not render the threads brittle when dried.  The centrifuge vessels may be driven by electric motors mounted on the spindle shaft of each vessel, the speed of revolution being considerably less than that normally required for spinning. The dried cakes may be used directly for winding into cones, or on circular looms for making hosiery, or for winding into cops.  The Specification as open to inspection under Sect. 91 (3) (a) comprises also the treatment of other wound forms of artificial silk or other yarn such as sharply-crossed reel or bobbin laps. This subject-matter does not appear in the Specification as accepted.ALSO:Artificial silk cakes, which have been washed or otherwise treated outside the spinning cans and are thus deformed, are introduced in coaxial position into perforated rotation vessels such as spinning cans adapted approximately to the outer periphery of the cakes, and are centrifuged therein.  The cakes thus recover their circular shape. They may be completely dried in the centrifuges by the introduction of warm air, or drying may be completed after they have been placed on drying bars.  The cakes become consolidated on removal of most of the water by centrifuging and are not deformed again when drying is completed on drying bars.  Preferably, the cakes are wrapped up in woven or net-like coverings and are centrifuged and dried in this condition.  Tubular knitted fabrics of artificial silk or mixed threads may be used for covering the cakes.  The centrifuge vessels may be driven by electric motors mounted on the spindle shaft of each vessel, the speed of revolution being considerably less than that normally required for spinning.  The process is applicable for the removal of water, oil emulsion, soap solution, reviving straightening and dyeing liquids which will not make the threads brittle on drying. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the treatment of other wound forms of artificial silk or other yarn such as sharply crossed reel or bobbin laps. This subject-matter does not appear in the Specification as accepted.