American School of Correspondence · Chicago, American school of correspondence · leaf 69
number of blows per minute, and while Fig. 12. Three-bladed Beater. 57 22 COTTOK SPINNING. some object to this necessary liigli speed, it is certainly cheaperto construct this style. The three bladecl beater is generallyused on openers, and the two bladed on breakers, intermediatesand finishers. … Some of the rigid beaters are made with tlie edges of theblades of hardened steel, but these do not wear any better than 5S *4 .y
Textile industry and fabrics
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