Patent ID: 9708736
Date: 2017-07-18
CPC Classifications: D02G,D03D,D10B

Claim:
1. A method of producing a core spun yarn, comprising: drawing a partially oriented yarn from a polyester supply package through a primary input roller to form an oriented polyester yarn; drawing the oriented polyester yarn through a secondary input roller immediately after drawing the partially oriented yarn from the polyester supply package through the primary input roller to form the oriented polyester yarn; drawing the oriented polyester yarn through a primary heater immediately after drawing the oriented polyester yarn through the secondary input roller; exposing the oriented polyester yarn to a cooling plate immediately after drawing the oriented polyester yarn through the primary heater; drawing the oriented polyester yarn through a friction twisting unit using an intermediate roller immediately after exposing the oriented polyester yarn to the cooling plate; drawing a spandex core from a spandex bobbin to become associated with the oriented polyester yarn at a supporting guide located between the friction twisting unit and the intermediate roller; drawing both the spandex core and the oriented polyester yarn through an intermingling jet immediately after drawing the spandex core from the spandex bobbin to become associated with the oriented polyester yarn at the supporting guide located between the friction twisting unit and the intermediate roller and drawing the oriented polyester yarn through the friction twisting unit using the intermediate roller; texturizing the oriented polyester yarn using the intermingling jet in accordance with drawing the oriented polyester yarn through the intermingling jet; twisting the oriented polyester yarn around the spandex core using at least one of the intermingling jet and the friction twisting unit; drawing the oriented polyester yarn and the spandex core through an NFR roller immediately after the intermingling jet, the NFR roller being a bearing supported roller type freewheel with no sealing; and heating the oriented polyester yarn and the spandex core using a secondary heater to form the core spun yarn immediately after drawing the oriented polyester yarn and the spandex core through the NFR roller.