Sliver stop motion for spinning machine

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame system positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source;
• a yarn package positioned to receive the yarn from said at least one drafting roll;
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member configured to pivotally mount said stop motion to said spinning frame so that said stop motion pivots from a first operative position wherein said sliver stop motion extends alongside and upstream from said drafting rolls to a second non-operative position to allow for adjustments by an operator during yarn breakage, an elongate pivoting member mounted to said frame mounting member for movement between an inactive position during normal yarn production and an active position responsive to a yarn break, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, and a sliver catching device connected to a distal end of said elongate pivoting member, said sliver catching device being positioned out of contact with said sliver when said pivoting member is in said inactive position, but positioned in contact with said sliver when said pivoting member is in said active position upon a break in yarn whereby sliver engaged by said sliver catching device is responsively broken and solely retained by said sliver catching device.

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame system positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source;
• a yarn package positioned to receive the yarn from said at least one drafting roll;
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member mounted to said spinning frame so that said stop motion pivots from a first operative position and an elongate pivoting member pivotally mounted to said frame mounting member for pivoting movement between an inactive position during normal yarn production and an active position responsive to a yarn break, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, and a sliver catching device comprising a plurality of teeth, said sliver catching device being connected to a distal end of said elongate pivoting member and rotatably mounted to the distal end of said elongate pivoting member for rotating said plurality of teeth from a first position directed toward sliver being drafted by said at least one drafting roll to a second position directed away from sliver after breakage of the sliver so that upon a break in sliver engaged by said sliver catching device is responsively broken and solely retained by said sliver catching device.

A sliver stop motion for mounting to a spinning frame for stopping the motion of sliver being drafted downstream from a sliver source by the spinning frame, the sliver stop motion comprising:

• an elongate frame mounting member;
• an elongate pivoting member pivotally mounted to said frame mounting member for movement between an inactive position during normal yarn production and an active position responsive to a yarn break, said elongate pivoting member having a medial portion, a distal portion connected to and extending upstream from said medial portion at an obtuse angle therefrom, and a proximal portion connected to and extending downstream from said medial portion at an obtuse angle therefrom;
• a yarn contact member connected to a proximal end of said elongate pivoting member positioned to slidably contact yarn being directed to a spindle to bias said pivoting member toward said inactive position so long as yarn is present;
• and
• a sliver comb connected to a distal end of said elongate pivoting member so that during a break in yarn said contact member responsively pivots from said inactive position to said active position whereby sliver engaged by said sliver comb is responsively broken and retained therebehind.

A sliver stop motion for mounting to a spinning frame for interrupting the motion of sliver being drafted by the spinning frame comprising:

• an elongate frame mounting member;
• an elongate pivoting member removably and pivotally mounted to said frame mounting member;
• a yarn contact member connected to a proximal end of said elongate pivoting member so as to underlie and slidably contact yarn being processed;
• and
• a sliver comb connected to a distal end of said elongate pivoting member, said comb comprising a plurality of comb teeth, at least one of said plurality of comb teeth including a barb integrally formed therein for operatively retaining sliver in said comb so that sliver responsively breaks during operative movement of the spinning frame when said comb operatively engages sliver.

A method of interrupting sliver delivery to a sliver spinning apparatus for spinning sliver into yarn, the method comprising the steps of:

• positioning a sliver source to provide sliver to the spinning frame;
• drafting the sliver with at least one drafting roll positioned downstream of said sliver source;
• and
• winding the yarn about a yarn package while simultaneously detecting a break along the sliver of the yarn so that when a break occurs, stopping further sliver from being drawn by the spinning frame by pivoting a sliver stop motion, penetrating the sliver with a sliver catching device, and retaining the sliver solely in the sliver catching device while continuously drawing the sliver through the drafting rolls to thereby sever the sliver being drawn downstream while retaining an upstream free end of the severed sliver in the comb.

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source to form a yarn therefrom;
• a yarn package arranged on a spindle positioned to receive the yarn from said at least one drafting roll;
• and
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member mounted to said spinning frame, an elongate pivoting member, an adjustable mount mounting said elongate pivoting member to said frame mounting member for pivoting movement about a pivot point between an inactive position during normal yarn production and an active position responsive to a yarn break, said adjustable mount being adjustably positionable along the length of said elongate pivoting member to permit adjusting the pivot point on said elongate pivoting member, said elongate pivoting member having a medial portion, a distal portion connected to and extending upstream from said medial portion at an obtuse angle therefrom, the distal portion including the distal end of said elongate pivoting member and also having portions thereof extending alongside said at least one drafting roll so that the distal end extends upstream from said at least one drafting roll, and a proximal portion connected to and extending downstream from said medial portion at an obtuse angle therefrom, the proximal portion including the proximal end of said elongate pivoting member, and wherein said adjustable mount is positioned on said medial portion, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, and a sliver comb connected to a distal end of said elongate pivoting member, said comb being positioned out of contact with sliver when said pivoting member is in said inactive position, but positioned in contact with sliver when said pivoting member moves to said active position upon a break in yarn sliver engaged by said sliver comb is responsively broken and retained by said sliver comb.

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source to form a yarn therefrom;
• a yarn package arranged on a spindle positioned to receive the yarn from said at least one drafting roll;
• and
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member mounted to said spinning frame, an elongate pivoting member, an adjustable mount mounting said elongate pivoting member to said frame mounting member for pivoting movement about a pivot point between an inactive position during normal yarn production and an active position responsive to a yarn break, said adjustable mount being adjustably positionable along the length of said elongate pivoting member to permit adjusting the pivot point on said elongate pivoting member, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, said yarn contact member comprising an elongate yarn contact rod connected to a proximal end of said elongate pivoting member and a frictional contact member detachably mounted to said elongate yarn contact rod for frictional contact with yarn being wound to the spindle, and a sliver comb connected to a distal end of said elongate pivoting member, said comb being positioned out of contact with sliver when said pivoting member is in said inactive position, but positioned in contact with sliver when said pivoting member moves to said active position upon a break in yarn sliver engaged by said sliver comb is responsively broken and retained by said sliver comb.

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source to form a yarn therefrom;
• a yarn package arranged on a spindle positioned to receive the yarn from said at least one drafting roll;
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member mounted to said spinning frame, an elongate pivoting member, an adjustable mount mounting said elongate pivoting member to said frame mounting member for pivoting movement about a pivot point between an inactive position during normal yarn production and an active position responsive to a yarn break, said adjustable mount being adjustably positionable along the length of said elongate pivoting member to permit adjusting the pivot point on said elongate pivoting member, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, and a sliver comb connected to a distal end of said elongate pivoting member, said comb being positioned out of contact with sliver when said pivoting member is in said inactive position, but positioned in contact with sliver when said pivoting member moves to said active position upon a break in yarn sliver engaged by said sliver comb is responsively broken and retained by said sliver comb;
• and
• a sensor operatively associated with said sliver stop motion for sensing operative movement of said sliver comb toward sliver upon yarn breakage and at least one indicator responsive to said sensor.

An apparatus for spinning sliver into yarn, the apparatus comprising:

• a sliver source;
• a spinning frame system positioned downstream from said sliver source, said spinning frame including at least one drafting roll for drafting sliver from said sliver source;
• a yarn package positioned to receive the yarn from said at least one drafting roll;
• a sliver stop motion mounted to said spinning frame for stopping the feed of sliver responsive to a break in yarn being wound onto said yarn package, said stop motion comprising a frame mounting member mounted to said spinning frame so that said stop motion pivots from a first operative position and an elongate pivoting member pivotally mounted to said frame mounting member for pivoting movement between an inactive position during normal yarn production and an active position responsive to a yarn break, a yarn contact member connected to a proximal end of said elongate pivoting member and positioned to slidably contact yarn being directed to said yarn package to bias said pivoting member toward said inactive position so long as a yarn is present, and a sliver comb comprising a plurality of teeth, said comb being connected to a distal end of said elongate pivoting member and rotatably mounted to the distal end of said elongate pivoting member for rotating said plurality of teeth from a first position directed toward sliver being drafted by said at least one drafting roll to a second position directed away from sliver after breakage of the sliver, at least one of said plurality of comb teeth including a barb integrally formed in and spaced apart from a distal end of the at least one of said plurality of teeth for operatively retaining sliver in said comb so that sliver responsively breaks during operative movement of said at least one drafting roll when said comb operatively engages sliver and so that upon a break in sliver engaged by said sliver comb the engaged sliver is responsively retained by said sliver comb.