Method of and apparatus for marking woven fabric with indicia during weaving of the woven fabric
AssigneeNissan Motor Co., Ltd.
InventorMiyuki Gotoh
Life of this patent
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Abstract
Herein disclosed is a method of and an apparatus for marking a woven fabric with indicia of discrete events of a predetermined nature or natures such as unit lengths of the fabric woven and the occurrences of defects in weaving such as improperly inserted picks of weft yarn, wherein picks of an index yarn or yarns are inserted into the weft-filling shed of the warp yarns concurrently with insertion of picks of the weft yarn when the occurrences of events of the predetermined nature or natures are detected during weaving of the fabric, the natures of the events being distinguished from one another by the difference between the lengths, colors, numbers or any other characteristics of the picks of the index yarn inwoven into the fabric.
Claims35
In a weaving loom in which a woven fabric is to be produced by warp yarns forming a weft-filling shed in each weaving cycle of the loom and a pick of a weft yarn inserted into the weft-filling shed during each weaving cycle, a method of marking the woven fabric with indicia of the occurrrences of discrete events of at least one predetermined nature in the fabric being woven, comprising:
- (a) detecting the occurrence of each of the discrete events in the fabric being woven, and
- (b) inserting a pick of an index yarn into the weft-filling shed of the warp yarns in response the occurrence of each of the events detected.
In a weaving loom in which a woven fabric is to be produced by warp yarns forming a weft-filling shed in each weaving cycle of the loom and a pick of a weft yarn inserted into the weft-filling shed during each weaving cycle, a method of marking the woven fabric with indicia of the occurrences of discrete events of predetermined natures in the fabric being woven, comprising:
- (a) preparing at least one continuous length of index yarn for being fed to the loom from an index-yarn supply package,
- (b) detecting the occurrence of each of the discrete events in the fabric being woven,
- (c) producing signals each indicative of the detected occurrence of each of the discrete events and having a predetermined characteristic which is proper to the particular nature of the event detected,
- (d) drawing the index yarn from said index-yarn supply package in response to each of said signals by a predetermined length which is proper to the characteristic of each signal, and
- (e) inserting the drawn length of the index yarn into the weft-filling shed.
In a weaving loom in which a woven fabric is to be produced by warp yarns forming a weft-filling shed in each weaving cycle of the loom and a pick of a weft yarn inserted into the weft-filling shed during each weaving cycle, a method of marking the woven fabric with indicia of the occurrences of discrete events of predetermined natures in the fabric being woven, comprising:
- (a) preparing at least two continuous lengths of index yarns for being fed to the loom from respective index-yarn supply packages,
- (b) detecting the occurrence of each of the discrete events in the fabric being woven,
- (c) producing signals each indicative of the detected occurrence of each of the discrete events and having a predetermined characteristic which is proper to the particular nature of the event detected,
- (d) selecting one of the index yarns depending upon the particular characteristics of each of said signals,
- (e) drawing the selected index yarn from the supply package of the index yarn by a predetermined length, and
- (f) inserting the drawn length of the index yarn into the weft-filling shed of the warp yarns.
In a waving loom in which a woven fabric is to be produced by warp yarns forming a weft-filling shed in each weaving cycle of the loom and a pick of a weft yarn inserted into the weft-filling shed during each weaving cycle, a fabric marking apparatus for marking the woven fabric with indicia of the occurrences of discrete events of predetermined natures in the fabric being woven, comprising:
- (a) index-yarn storage means for supplying at least one continuous length of index yarn 70,70'
- (b) index-yarn retaining and inserting means operative to draw the index yarn from said storage means and inserting a pick of the index yarn into the weft-filling shed of the warp yarns when actuated, and
- (c) control means responsive to the occurrences of the discrete events in the fabric being woven and operative to actuate said retaining and inserting means in response the occurrence of each of the discrete events for causing the retaining and inserting means to draw the index yarn from said storage means and insert a pick of the index yarn into the weft-filling shed depending upon the individual natures of the discrete events.
Dependencies are inferred from the claim text.