Observations on the Effect of Slow Speeds, and Electrostatic, Aerodynamic, and Mechanical Forces on Carding Cotton

Abstract

Some observations were made of a card during developmental research. A reduction in air pressure above the lap feed to below zero, by means of an outside suction, affects detrimentally lickerin performance. Fiber separation in the card feed system is poorly accomplished and improvements will probably require a departure from the conventional design. A 3.6-in-diameter lickerin his about the same cleaning performance as a standard 9-in. lickerin. A 9-in.-diameter doffer cylinder with metallic closing per forms equally as well as a standard doffer, but the setting is more critical. An electro static force improves the alignment of unrestrained fibers, but practical application is difficult. Operation of a card at reduced speed shows normal performance and permits observation of the loading of the main cylinder.