Shuttleless loom weft detaining device

A shuttleless loom weft measuring and detaining device comprising:

• a drum on which a weft yarn is wound prior to introduction to a weft inserting means, said drum being formed with a taperered section which is tapered down toward the weft inserting means, and a generally cylindrical section which is integral with said tapered section, said generally cylindrical section being located nearer to the weft measuring means than is said tapered section, the weft yarn supplied from weft yarn supply means to said tapered section being introduced through said generally cylindrical section to the weft inserting means;
• first catching means for catching a first portion of the weft yarn to detain the weft yarn on said drum at least for a period of a weft picking of the weft yarn through the weft inserting means, said first catching means including a first catching member located in the vicinity of the border between said tapered section and said generally cylindrical section to catch the weft yarn first portion;
• and
• second catching means for catching a second portion of the weft yarn to detain the weft yarn on said drum for a period except for at least the weft picking period, said second portion being located in front of said first portion relative to the direction of weft yarn movement, said second catching means including a second catching member associated with said generally cylindrical section to catch the weft yarn second portion, whereby a predetermined length of the weft yarn is wound on said generally cylindrical section between said first and second catching members prior to the weft picking.

A shuttleless loom weft measuring and detaining device comprising:

• a drum on which a weft yarn is wound prior to introduction to a weft inserting means, said drum being formed with a frustoconical section tapered down toward the weft inserting means, and a cylindrical section integral with said frustoconical section, said cylindrical section being located nearer to the weft inserting means than is said frustoconical section, the weft yarn supplied from weft yarn supply means to said frustoconical section being introduced through said cylindrical section to the weft inserting means;
• first catching means for catching a first portion of the weft yarn to detain the weft yarn on said drum at least for a period of weft picking of the weft yarn through the weft inserting means, said first catching means including a first catching member located in the vicinity of the border between the weft yarn first portion;
• and
• second catching means for catching a second portion of the weft yarn to detain the weft yarn on said drum for a period except for at least the weft picking period, said second portion being located in front of said first portion relative to the direction of weft yarn movement, said second catching means including a second catching member associated with said cylindrical section to catch the weft yarn second portion, whereby a predetermined length of the weft yarn is wound on said cylindrical section between said first and second catching members prior to the weft picking.

A shuttleless loom weft measuring and detaining device comprising:

• a drum on which a weft yarn is wound prior to weft insertion by weft inserting means, said drum having an inclined section which is inclined down toward the weft inserting means, and a straight section connected to said inclined section, said straight section being located nearer to the weft inserting means than is said inclined section, the weft yarn supplied from weft yarn supply means to said inclined section being introduced through said straight section to the weft inserting means;
• first catching means for catching a first portion of the weft yarn to detain the weft yarn on said drum inclined section at least for a period of weft picking of the weft yarn;
• and
• second catching means for catching a second portion of the weft yarn to detain the weft yarn on said drum straight section for a period except for at least the weft picking period, whereby a predetermined length of the weft yarn is wound on said drum by the cooperation of said first and second catching means.