Broken end-collecting installation and method of operating the same

A broken end-collecting installation for the drafting gears of spinning machines for spinning a yarn moving through a spinning triangle, each drafting gear having cooperating upper and lower rollers, including at least one feed roller, comprising:

• a suction head provided for each drafting gear;
• means defining an air pressure sink operatively connected with said suction head;
• said suction head incorporating a substantially slot-shaped suction opening operatively associated with the feed roller of the related drafting gears;
• said slot-shaped suction opening extending from an end thereof situated closer to the spinning triangle to an end thereof situated closer to the air pressure sink in the flow direction of the air;
• a respective suction tube for each drafting gear;
• each said suction tube extending approximately transversely with respect to the axes of the rollers of the drafting gear;
• each said suction tube having an end part forming one said suction head and extending at a predetermined angle with respect to the lengthwise axis of the suction tube;
• the end of the suction opening of each suction head situated closer to the air pressure sink protruding into the axial projection of the related suction tube;
• the suction tube possesses suction openings confronting the drafting gear-rollers;
• and
• stripper means provided for the upper rollers of the drafting gear operatively associated with said suction openings.

A broken end-collecting installation for the drafting gears of spinning machines for spinning a yarn moving through a spinning triangle, each drafting gear having cooperating upper and lower rollers, including at least one feed roller, comprising:

• a suction head provided for each drafting gear;
• means defining an air pressure sink operatively connected with said suction head;
• said suction head incorporating a substantially slot-shaped suction opening operatively associated with the feed roller of the related drafting gear;
• said slot-shaped suction opening extending from an end thereof situated closer to the spinning triangle to an end thereof situated closer to the air pressure sink in the flow direction of the air;
• a respective suction tube for each drafting gear;
• each said suction tube extending approximately transversely with respect to the axes of the rollers of the drafting gear;
• each said suction tube having an end part forming one said suction head and extending at a predetermined angle with respect to the lengthwise axis of the suction tube;
• the end of the suction opening of each suction head situated closer to the air pressure sink protruding into the axial projection of the related suction tube;
• the suction tubes extend above the drafting gears of the machine;
• a common suction channel extending in the lengthwise direction of the machine with which there are connected the suction tubes;
• means pivotably mounting each suction head together with the related suction tube about an axis extending approximately parallel to the suction channel and between a work position and a spinning start-up position.

A broken end-collecting installation for the drafting gears of spinning machines for spinning a yarn moving through a spinning triangle, each drafting gear having cooperating upper and lower rollers, including at least one feed roller, comprising:

• a suction head provided for each drafting gear;
• means defining an air pressure sink operatively connected with said suction head;
• said suction head incorporating a substantially slot-shaped suction opening operatively associated with the feed roller of the related drafting gear;
• said slot-shaped suction opening extending from an end thereof situated closer to the spinning triangle to an end thereof situated closer to the air pressure sink in the flow direction of the air;
• a respective suction tube for each drafting gear;
• each said suction tube extending approximately transversely with respect to the axes of the rollers of the drafting gear;
• each said suction tube having an end part forming one said suction head and extending at a predetermined angle with respect to the lengthwise axis of the suction tube;
• the end of the suction opening of each suction head situated closer to the air pressure sink protruding into the axial projection of the related suction tube;
• blower means arranged above the suction tubes at the machine;
• said blower means including at least one blower nozzle;
• each suction tube supporting a substantially roof-shaped screening element covering the yarn path of travel and extending up to the suction head.

A broken end-collecting installation for the drafting arrangements of spinning machines from which fiber material passes on to guide means of a twisting device, comprising:

• a suction head provided for each drafting arrangement;
• means defining an air pressure sink with which there is operatively connected each said suction head;
• each said suction head having a substantially slot-shaped suction opening capable of being operatively associated with a feed roller of its related drafting arrangement;
• said substantially slot-shaped suction opening imparting to a ruptured yarn piece leading to a rupture location following the guide means of the twisting device a different position than the path of travel of fiber material which is further delivered from the drafting arrangement.