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US 5,069,395 AGranted
Method for delivering thread to a thread user and apparatus for performing the method
AssigneeLindauer Dornier Gesellschaft mbH
InventorValentin Krumm
Life of this patent
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AssigneeLindauer Dornier Gesellschaft mbH
InventorValentin Krumm
Estimating the term…
A method and apparatus for delivering thread from a coiled thread supply to a thread user, is arranged and constructed to avoid twisting, snagging, and breaking of the thread, especially threads of the so-called "Lurex".RTM. type. For this purpose the supply spool is positively driven in response to a drive control which drives the spool in a direction of the original winding of the thread onto the spool, that is, opposite to the direction of the unwinding of the thread from the spool so that the take-off point where the thread separates from the winding on the spool, remains approximately stationary or even completely stationary due to the compensation of the tendency of the take-off point to travel in a direction opposite to the original winding direction. The take-off point remains able to travel axially back and forth along the spool.
An apparatus for delivering thread to a thread user, comprising thread supply means including a thread supply spool (1) for providing thread that separates from said thread supply spool at a take-off point (44), spool drive means (9) for positively driving said thread supply spool (1), sensor means (32, 48, 49) for sensing an instantaneous location of said take-off point to provide a control signal representing a motion characteristic of said take-off point, and drive control means (10) responsive to said sensor means for controlling the operation of said spool drive means so that motions of said take-off point are minimized or reduced to zero in a circumferential direction while still permitting radial and axial movements of said take-off point.
A method for avoiding twisting of a thread as the thread is being pulled off a thread supply spool, comprising the following steps:
Dependencies are inferred from the claim text.