the first card in the carding process, used to open the raw stock and to convert it into sliver form.
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How to use breaker card in a sentence
A receptacle, very similar to that used at the breaker card, appears near the far end of the softening machine in Fig. 13.The Jute Industry: From Seed to Finished Cloth | T. Woodhouse and P. Kilgour
The sliver from the can of the breaker card may be wound into balls, or it may be taken direct to the finisher card.