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Abstract
The purpose of the work described in this paper was to investigate how the various factors involved in dabbing fibres into a bed of pins, such as is encountered in Noble combing, affected this dabbing force. The experimental work was done on an apparatus that simulated the actual dabbing process, and the factors involved were sliver weight, number of pre-gillings, fibre diameter, amount and type of oil added, temperature, regain of fibres, depth and speed of dabbing, brush properties, and pin densities.
It would seem that the force required to push a brush into a bed of pins, as on the Noble comb, depends primarily on pin density, temperature of the pins, presence and type of oil, pre-gilling operations, sliver thickness, and fibre diameter, in that order. Other factors affecting this force, but which are of a more secondary order, are depth and speed of dabbing, regain, and tautness of the sliver.