Draw warping apparatus
AssigneeMcCoy-Ellison, Inc.
InventorsJohn F. Hagewood, Kurt W. Niederer, Daniel W. McCoy, Sr.
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AssigneeMcCoy-Ellison, Inc.
InventorsJohn F. Hagewood, Kurt W. Niederer, Daniel W. McCoy, Sr.
Estimating the term…
A drawing apparatus for a textile draw warping system includes rotatable feed, swing, godet and take-up rolls about which a plurality of synthetic continuous filaments travel in sequential peripheral engagement. The godet and take-up rolls are driven at different relative speeds with the godet roll being heated above the glass transition temperature of the filaments to cause drawing of the filaments between the godet and take-up rolls. A heated contacts the filaments between the godet and take-up rolls to crystalize the drawn filaments. The godet and swing rolls are mounted for movement in respective arcuate paths which are mutually convex to one another for disengaging the filaments from the godet roll upon stoppage of the drawing system while maintaining constant filament tension to prevent overheating and degradation of the filaments. The platen is also movable away from the filament path upon system stoppages in coordinated relation to the decreasing speed of filament travel.
In a textile draw warping system wherein a plurality of synthetic continuous filaments which are less than fully oriented are delivered in parallel relationship for winding on a warp beam, a drawing apparatus comprising a rotatable feed roll, a rotatable godet roll and a rotatable take-up roll arranged for training of the filaments to travel in peripheral engagement sequentially therewith, means for heating said godet roll, means for driving said godet roll and said take-up roll at respective relative speeds for drawing said filaments during travel between said godet roll and said take-up roll, stop motion means for actuating stoppage of said drawing apparatus, and means associated with said stop motion means to be operative upon stoppage of said drawing apparatus for removing said filaments from engagement with said godet roll to prevent continued application of heat to said filaments and further operative upon restart of said drawing apparatus for reengaging the filaments with said godet roll at the same location as the previous contact between the filaments and said godet roll, said filament removing and reengaging means including means for maintaining a predetermined tension in the removed filaments along their respective extents between the location of their last contact with said godet roll and said take-up roll and to maintain substantially constant length of the filaments between said feed roll and said take-up roll, thereby to prevent degradation of the filaments during stopping and starting of said drawing apparatus.
Dependencies are inferred from the claim text.