摘要:
The device comprises at least one rotary ring against which the filament must be applied so as to be driven in rotation by the inner edge of the rotary ring to undergo twisting. This rotary ring is driven by a single drive roller and the rotary ring comprises an outer edge of magnetic material. It is supported on said single drive roller by a fixed support roller and by a magnetic device inserted between the fixed support roller and the single drive roller.
摘要:
A device for forming a yarn reserve on a bobbin tube during the winding operation includes an arm turnable about an axis transverse to the axis of the bobbin tube. The arm engages during its turning in one direction with its hooked end the yarn so that the yarn is wound in one direction on one end of the bobbin tube and a catch member on the arm engages during the turning thereof in this one direction a surface of a disc rotating about an axis parallel to the tube axis, which surface is inclined to the axis of rotation of the disc so that during such rotation the arm is turned in the opposite direction causing corresponding winding of the yarn at the one end of the bobbin tube. A yarn reserve is thus formed at the one end of the bobbin tube in which a plurality of turns are wound in one direction and a following plurality of turns is wound in the opposite direction extending over the first-mentioned turns. The bobbin tube is mounted on support tiltable between a winding position and a release position and the textile machine is also provided with a yarn tension sensor cooperating with a cutter to cut the yarn when the tension thereof slackens. The sensor is rendered inoperative when the tube support is tilted to the release position and rendered operative after a new bobbin tube on the support is placed in winding position.
摘要:
The device has several rotary rings against which the filament must be applied so as to be driven in rotation by the inner edge of the said rotary rings to undergo twisting. These rotary rings, being staggered along a rectilinear path and distributed in two groups, which overlap so that in following the rectilinear path there is encountered alternately a ring of one group and a ring of the other group. These two groups can undergo relative displacement in a plane perpendicular to the rectilinear path. The rings of the two groups are urged against a single drive roller driving the said rings, and the relative displacement of the two groups is effected by pivoting around the axis of this single drive roller.
摘要:
The element is a tube with a zone of its inner wall extended radially close to its axis over a helicoidal track extending through the tube. The thread can thus be passed axially through the tube and heated by conduction through the zone, whilst being simultaneously heated by radiation from the tube wall and by convection from a hot fluid circulated through the tube.