Yarn laying-on-guide for electronically controlled sample warper
AssigneeSuzuki Warper Ltd.
InventorYoshihiro Tanaka
Life of this patent
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Abstract
An electronically controlled sample warper capable of warping yarns on a warper drum, with windings of the yarns neatly layered one above another in regular order, thus enabling the yarns to be readily rewound on beams on a weaving machine even when the warping length, i.e., the number of multi-windings is relatively large such as four or more windings. The sample warper includes a guide operable to ensure that the yarn for the "n"th winding is wound on the warper drum such that at the beginning of the "n"th winding, the yarn is placed ahead of an end of a winding of yarn formed on warper drum by the "n-1"th winding.
Claims9
An electronically controlled sample warper for automatically warping in a desired pattern of yarns, said warper including a warper drum having a longitudinal axis and longitudinally extending drum spokes, a yarn introduction lever rotatably disposed adjacent to one end of the warper drum, rollers rotatably mounted at opposite ends of each drum spoke, conveyor belts wound around said rollers, means for moving each of said conveyor belts a desired distance longitudinally of said drum and a yarn guide device;
- said yarn guide device comprising guide means slideably mounted on each of the drum spokes at said end adjacent to the yarn introduction lever, said guide means being slidable in the longitudinal direction of the drum spoke for guiding the yarn from the yarn introduction lever, means for moving said guide means to move the yarn in a warping direction by a first distance which is twice to half the thickness of the yarn for each revolution of the yarn introduction lever, means for rapidly moving said guide means back a second distance which is equal to the product of said first distance and a preset multi-winding value when the number of revolutions of the yarn introduction lever reaches said preset multi-winding value, thereby returning said guide means to an original start position, and means for moving said conveyor belts in the warping direction by a third distance which is equal to a longitudinal warp density, said moving of said conveyor belts being concurrently with a rapid movement back of said guide means through said second distance by said means for rapidly moving said guide means.
A warping method carried out by an electronically controlled sample warper for automatically warping in a desired pattern of yarns, said warper including a warper drum having a longitudinal axis and longitudinally extending drum spokes, a yarn introduction lever rotatably disposed adjacent to one end of the warper drum, rollers rotatably mounted at opposite ends of each drum spoke, conveyor belts wound around said rollers, means for moving each of said conveyor belts a desired distance longitudinally of said drum and a yarn guide device;
- said yarn guide device comprising guide means slideably mounted on each of the drum spokes at said end adjacent to the yarn introduction lever, said guide means being slidable in the longitudinal direction of the drum spoke for guiding the yarn from the yarn introduction lever, said method comprising the steps of moving said guide means to move the yarn in a warping direction by a first distance which is twice to half the thickness of the yarn for each revolution of the yarn introduction lever, rapidly moving said guide means back a second distance which is equal to the product of said first distance and a preset multi-winding value when the number of revolutions of the yarn introduction lever reaches said preset multi-winding value, thereby returning said guide means to an original start position, moving said conveyor belts in the warping direction by a third distance which is equal to a longitudinal warp density concurrently with the rapid movement of said guide means through said second distance to the original start position, and winding a yarn for a "n-1" winding and a yarn for an "n"th winding on said warper drum such that at a beginning of the "n"th winding, the yarn is placed ahead of an end of a winding yarn formed on said warper drum by the "n-1" winding.
Dependencies are inferred from the claim text.