US 5,410,786 A · Process and arrangement for the warping of threads onto a drum having a conical surface

Abstract

Threads are warped with an axially moveable slide onto a drum having a cone, into a plurality of successive warp bands. The threads are warped for a first band based on a predetermined advancement schedule for the slide. The warping of the first band, after a predetermined initial phase, is performed by: (a) measuring an aspect parameter, signifying the form of the winding of the first band, (b) correcting the predetermined advancement schedule of the slide based on a comparison of the aspect parameter and a targeted parametric value to compose a corrected advancement schedule, and (c) storing a successive plurality of descriptive parameters signifying the evolving form of the winding of the band, when successive revolutions of the drum meet a predetermined drum schedule. The threads are warped for successive ones of the bands by: (a) advancing the slide according to the corrected advancement schedule, at least for times after an initial phase, (b) measuring the descriptive parameter according to the predetermined drum schedule during the warping of the bands, and (c) adjusting tension of thread being delivered, depending upon current deviations of the descriptive parameter from corresponding stored values of the descriptive parameter.

Claims26

Dependent claims

Process for warping threads with a slide onto a rotating drum having a cone into a plurality of successive warp bands, said drum and said slide being relatively and axially displaceable with respect to each other to shape the bands, their windings and their form, said process comprising the steps of:

warping the threads for a first one of the bands based on a predetermined advancement schedule for the slide, the warping of the first one of the bands, after a predetermined initial phase, being performed by:
(a) measuring an aspect parameter signifying the form of the winding of the first one of the bands,
(b) correcting the predetermined advancement schedule of the slide based on a comparison of the aspect parameter and a targeted parametric value to compose a corrected advancement schedule, and
(c) storing a successive plurality of descriptive parameters signifying the evolving form of the winding of the band when successive revolutions of the drum meet a predetermined drum schedule;
warping the threads for successive ones of the bands by:
(a) advancing the slide according to the corrected advancement schedule obtained during the first one of the bands, at least for times after the initial phase,
(b) measuring the descriptive parameter according to the predetermined drum schedule during the warping of the bands, and
(c) adjusting tension of thread being delivered depending upon current deviations of the descriptive parameter from corresponding stored values of the descriptive parameter.

5 more elements

Warping machine for warping threads into a plurality of successive warp bands, comprising:

a drum having a cone;
a slide having an adjustable slide advancement drive, said slide and said drum being relatively displaceable for laying said warp bands in a laterally adjustable manner;
a tensioning arrangement having an instruction input and being responsive to signals thereon for altering thread tension on the warp bands;
a measuring arrangement including (a) means for providing a signal signifying an aspect parameter indicating the form of windings of the warp bands, and (b) means for providing a signal signifying a descriptive parameter characterizing the form of winding of the warp bands;
and
a processing arrangement coupled to said measuring arrangement, said tensioning arrangement, and said slide, including:
(a) a storage means having means for storing for a first one of the warp bands, signals from said measuring arrangement, including signals signifying said descriptive parameter and positioning of said slide, and
(b) a comparison means including:
(i) means responsive to signals from said measuring arrangement for correcting the slide advancement drive in response to a comparison of the aspect parameter and a predetermined, targeted parametric value during a first wind and for keeping the slide advancement drive corrected during following winds based on signals stored in said storage means during an initial wind, and
(ii) means for providing a deviation signal in response to current deviations of the descriptive parameter from corresponding values of the descriptive parameter stored in said storage means during said first wind, said deviation signal being applied to said instruction input of said tensioning arrangement at least during winds following said initial wind.

7 more elements

Dependencies are inferred from the claim text.

Process and arrangement for the warping of threads onto a drum having a conical surface

Life of this patent

Process and arrangement for the warping of threads onto a drum having a conical surface

Life of this patent

Abstract

Claims26