US 4,669,159 AGranted

Arrangement for the stretching and warping of warp threads

AssigneeKarl Mayer Textilmaschinenfabrik GmbH

InventorBogdan Bogucki-Land

Life of this patent

Estimating the term…

Loading patent…

Abstract

In an arrangement for the stretching and warping of thermoplastic warp threads, in particular polyester threads, there is provided an arrangement comprising a set of feeding rollers, a heating arrangement and a set of take-off rollers. The latter set of rollers has a higher circumferential speed than the former. Between the two sets of rollers there is provided at least one deflecting roller. The circumferential surface of this deflecting roller is divided into a heatable section and a relatively non-heatable section. The deflecting roller is rotatable from an operating position, in which the deflecting surface comprises the heatable surface portion, into a rest position wherein the deflecting surface presented is the non-heatable portion. In this way, the length of the thread exposed to heat can be extended between the feeding and take-off rollers without overheating of thread during the stopping of the arrangement. Other aspects of the mode of the process are also described herein.

Claims22

Dependent claims

Arrangement for the stretching and warping of warp threads comprising:

a feed roller means for driving said warp threads;
a take-off roller means for driving said warp threads received from said feed roller means, said take-off roller means having a greater circumferential speed than said feed roller means;
a heating device positioned between said take-off and feed roller means for heating said threads;
at least one deflecting means rotatable about an axis, comprising a curved surface, the axis of said deflecting means being disposed perpendicular to the plane of curvature of said curved surface positioned between said take-off and feed roller means to contact said warp threads, said deflecting means including a heatable and relatively non-heatable segment, wherein said heatable segment has a coefficient of friction sufficiently high to cause heating of said threads by a predetermined amount when passing over said heatable segment due to the driving influence of said take-off and feed roller means;
means coupled to said heatable segment for conducting heat to it;
motive means for rotating said deflecting means about said axis and for presenting to said warp threads said heatable and said non-heatable segment when said arrangement is in an operative and non-operative condition, respectively, said heating device comprising a heater mounted alongside said deflecting means to reciprocate with respect to said warp threads, said heating being operable to move into proximity to and away from said warp threads in response to said arrangement being in an operative and inoperative condition, respectively;
control means for activating said motive means;
and
take up means for said treated threads.

6 more elements

Arrangement for the stretching and warping of warp threads comprising:

a feed roller means for driving said warp threads wherein said feed roller means comprises at least one heatable roller;
a take-off roller means for driving said warp threads received from said feed roller means, said take-off roller means having a greater circumferential speed than said feed roller means, wherein said take-off roller means comprises at least one coolable roller;
a heating device positioned between said take-off and feed roller means for heating said threads;
means for reciprocating said heating device to move into proximity to and away from said warp threads in response to the arrangement being in an operative and inoperative condition, respectively;
at least one deflecting means rotatable about an axis, comprising a curved surface, the axis of said deflecting means being disposed perpendicular to the plane of curvature of said curved surface positioned between said take-off and feed roller means to contact said warp threads, said deflecting means including a heatable and relatively non-heatable segment;
means coupled to said heatable segment for conducting heat to it;
motive means for rotating said deflecting means about its axis for presenting to said warp threads said heatable and said non-heatable segment when said arrangement is in an operative and non-operative condition, respectively;
control means for activating said motive means;
and
take up means for said treated threads;
and further comprising:
a closed circuit for circulating a thermal medium comprising:
(a) a heating means operable to heat said medium and feed it to said heatable roller;
(b) a cooling means for cooling said medium and feeding it to said take-off roller means for cooling said coolable roller;
(c) a circulating pump communicating with said heating and cooling means for circulating through them said thermal medium;
(d) a first regulator means for sensing the output temperature of said heating means and regulating its output temperature toward a predetermined first temperature;
and
(e) a second regulator means for sensing the output temperature of said cooling means and regulating its output temperature toward a predetermined second temperature.

15 more elements

Dependencies are inferred from the claim text.