Planetary gear type selvage forming and cord catching device for loom

A selvage forming and cord catching device for use in a loom in which a fabric having a selvage is woven with warps and wefts, said selvage forming and cord catching device comprising:

• a base adapted to be secured on the loom having two gear seats formed thereon;
• yarn supply means for supplying yarn to said loom;
• a first planetary gear train comprising a sun gear rotatably supported in the first gear seat of the base and adapted to be in driving engagement with a motion transmission system of the loom to be driven thereby, a ring gear fixed on the base and two planetary gears driven by the sun gear and engaging the ring gear to orbit about a central axis of the sun gear by the rotation of the sun gear, each of the planetary gears comprising a concentrically-disposed cylindrical yarn guide member which defines a passage to allow said yarn supplied from said yarn supply means to pass therethrough and an eccentrically-mounted guide arm to which the yarn extending through the cylindrical yarn guide member is escorted to be fed therefrom to the loom so that when the planetary gears are rotated to orbit about the central axis of the sun gear, the yarns supplied from the cylindrical yarn guide members are fed to the loom in an inter-crossing and inter-winding manner by the escort of the eccentric guide arms to wind around each other;
• and
• a second planetary gear train comprising a sun gear rotatably supported in the second gear seat of the base and in driving engagement with the sun gear of the first planetary gear train to be driven thereby, a ring gear fixed on the base and two planetary gears driven by the sun gear and engaging the ring gear to orbit about a central axis of the sun gear by the rotation of the sun gear, each of the planetary gears comprising a concentrically-disposed cylindrical yarn guide member which defines a passage to allow said yarn supplied from said yarn supply means to pass therethrough and an eccentrically-mounted guide arm to which the yarn extending through the cylindrical yarn guide member is escorted to be fed therefrom to the loom so that when the planetary gears are rotated to orbit about the central axis of the sun gear, the yarn supplied from the cylindrical yarn guide members is fed to the loom in an inter-crossing and inter-winding manner by the escort of the eccentric guide arms to wind around each other for pinching therebetween an excessive length of the wefts to allow the excessive length of the wefts to be cut along the selvage by cutting means and carrying the cut wefts away.