Back to results
US 4,754,599 AGranted
Yarn twisting apparatus
AssigneeArtec Design GmbH
InventorGeorg Siebert
Life of this patent
Estimating the term…
Abstract
A yarn twisting apparatus is disclosed for twisting a plurality of yarn strands into a composite yarn, and which comprises a central twisting spindle and yarn guide means for ballooning the yarn about the package as it is withdrawn therefrom. A common drive system is provided for rotating the ballooning means and for advancing the yarn, and a yarn accumulator is provided which is controlled by a sensor such that the drive means is operated only when the amount of yarn on the accumulator is less than a predetermined amount.
Claims17
A yarn twisting apparatus comprising
- a central spindle mounted for rotation about a central axis,
- a yarn guide mounted at a location which is in general alignment with said central axis,
- a yarn package carrier mounted adjacent said spindle,
- yarn accumulation means,
- drive means for rotating said spindle about said central axis, and for advancing a yarn from a package mounted on said package carrier to said yarn guide and then to said yarn accumulation means at a speed coordinated with the rotational speed of said spindle, and while ballooning the yarn about said central axis as it advances between the package and said yarn guide, and
- sensor means for monitoring the amount of yarn received on said yarn accummulation means and for operating said drive means so as to rotate said spindle and deliver twisted yarn to said accumulation means whenever the amount of yarn on said accumulation means is below a predetermined minimum amount,
- whereby a yarn may be withdrawn from a yarn package mounted on said carrier and ballooned about said central axis to impart twist thereto, and with the twisted yarn being accumulated on said accumulation means, and such that the twisted yarn may be intermittently withdrawn from said accumulation means by a user and said predetermined minimum amount of the twisted yarn will be automatically maintained on said accumulation means.
4 more elements
A yarn twisting apparatus comprising
- a central spindle mounted for rotation about a central axis and having a coaxial yarn duct therein and which includes a yarn inlet end and a yarn outlet opening,
- a yarn package carrier mounted adjacent said spindle,
- yarn guide means including a guide arm fixedly mounted to said spindle, for ballooning an advancing yarn about said central axis after exiting from said outlet opening and upon rotation of said spindle, and so as to impart twist to the advancing yarn,
- yarn accumulation means,
- drive means for rotating said spindle about said central axis, and for advancing a yarn from said yarn guide means to said yarn accumulation means at a speed coordinated with the rotational speed of said spindle, and
- sensor means for monitoring the amount of yarn received on said yarn accummulation means and for operating said drive means so as to rotate said spindle and deliver twisted yarn to said accumulation means whenever the amount of yarn on said accumulation means is below a predetermined minimum amount,
- whereby a yarn may be withdrawn from a yarn package mounted on said carrier and advanced into said inlet opening and through said duct to said outlet opening, then ballooned about said central axis to impart twist thereto, and with the twisted yarn being accumulated on said accumulation means, and such that the twisted yarn may be intermittently withdrawn from said accumulation means by a user and said predetermined minimum amount of the twisted yarn will be automatically maintained on said accumulation means.
4 more elements
A yarn twisting apparatus comprising
- a central hollow spindle mounted for rotation about a central axis and having a coaxial yarn duct therein and which includes a yarn inlet end and a yarn outlet opening therein,
- a yarn package carrier mounted coaxially about said spindle and so as to preclude the free rotation of said carrier about said central axis, and such that said inlet end is on one side of said carrier and said outlet opening is on the other side of said carrier,
- initial yarn guide means mounted on said package carrier for guiding a yarn withdrawn from a package mounted on said carrier into said inlet end of said spindle,
- ballooning yarn guide means including a radial guide arm fixedly mounted to said spindle, for ballooning an advancing yarn about said central axis after exiting from said outlet opening and upon rotation of said spindle, and so as to impart twist to the advancing yarn,
- yarn accumulation means,
- drive means for rotating said spindle about said central axis, and for advancing a yarn from said ballooning yarn guide means to said yarn accumulation means at a speed coordinated with the rotational speed of said spindle, and
- sensor means for monitoring the amount of yarn received on said yarn accummulation means and for operating said drive means so as to rotate said spindle and deliver twisted yarn to said accumulation means whenever the amount of yarn on said accumulation means is below a predetermined minimum amount,
- whereby a yarn may be withdrawn from a yarn package mounted on said carrier and advanced into said inlet end and through said duct to said outlet opening, then ballooned about said central axis to impart twist thereto, and with the twisted yarn being accumulated on said accumulation means, and such that the twisted yarn may be intermittently withdrawn from said accumulation means by a user and said predetermined minimum amount of the twisted yarn will be automatically maintained on said accumulation means.
5 more elements
Dependencies are inferred from the claim text.