High draft apparatus in spinning machine
AssigneeMurata Kikai Kabushiki Kaisha
InventorsTeiji Nakahara, Toshifumi Morihashi, Teruo Nakayama, Shinichi Nishimura, Hisaaki Kato, Ikuzo Uematsu, Takashi Yoshioka
Life of this patent
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Abstract
A high draft apparatus in a spinning machine for forming a spun yarn from a roving or sliver. The draft apparatus comprises back rollers, apron-provided middle rollers and front rollers and a gripping and a pressing means for a sliver disposed on the front end portion of the apron so that the arrangement of fibers in the drafted sliver is regulated and a high draft ratio can be attained.
Claims9
A high draft apparatus in a spinning machine comprising back rollers, a width adjusting guide, apron-provided middle rollers and front rollers which are arranged in succession along a yarn passage characterized in that the draft apparatus further includes a gripping and pressing means disposed on the front end of the apron which gripping and pressing means comprises a tenser bar having a T-shaped cross section which is fixed to a fixing bar and is disposed on the inner side of the front end of the lower apron, and a cradle which is urged toward the inner side of the front end of the upper apron by a spring and is urged in the pressed state toward the tenser bar.
A high draft apparatus in a spinning machine having a main draft ratio between 20 and 70 comprising back rollers, upper and lower middle rollers provided with an apron and front rollers which are arranged in succession along a yarn passage, characterized in that the nip point of the front end of the apron is displaced from the nip point of the front rollers in a vertical direction along the yarn passage and in that the apron comprises a pair of endless belts which at the back end of the apron extend over the upper and lower middle rollers, a fixed position tenser bar having a T-shaped cross-section disposed inside of the front end of the lower apron, a cradle disposed on the inside of the front end of the upper apron and a spring held in a fixed position holding the cradle and resiliently urging the cradle toward the front end of the upper apron and toward the tenser bar.
Dependencies are inferred from the claim text.