US2883733A - Thread storing and thread advancing device comprising an idler advancing roller - Google Patents

Thread storing and thread advancing device comprising an idler advancing roller Download PDF

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Publication number
US2883733A
US2883733A US413412A US41341254A US2883733A US 2883733 A US2883733 A US 2883733A US 413412 A US413412 A US 413412A US 41341254 A US41341254 A US 41341254A US 2883733 A US2883733 A US 2883733A
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US
United States
Prior art keywords
thread
roller
advancing
idler
filaments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US413412A
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English (en)
Inventor
Notarbartolo Luigi
Belgiojoso Gaetano B Di
Bruni Gaetano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SNIA Viscosa SpA
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SNIA Viscosa SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SNIA Viscosa SpA filed Critical SNIA Viscosa SpA
Application granted granted Critical
Publication of US2883733A publication Critical patent/US2883733A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins

Definitions

  • the drawing in particular of synthetic materials, is conveniently carried out by causing the filaments to travel successively over two devices which impart to the filaments considerably difierent linear speeds: more precisely, the filaments are taken up by the second device with a linear speed that is a multiple of the speed with which they are delivered by the first device.
  • the devices in question often consist of groups or couples of cylinders.
  • the present invention relates to an improvement in cold drawing devices of the type described, consisting of a main roller and an advancing roller, the latter being generally of a smaller diameter and having its axis askew with respect to that of the first mentioned roller.
  • the continuous filaments or bundles of filaments or slivers, hereinafter generally called thread arrange themselves, in devices of this kind, in a series of successive turns, that is in a substantially helical path; therefore, the length of thread which is in contact with one of such devices at any given moment, is relatively great, whereby it can be stated that the device stores the thread besides causing it to travel forth, and the device is called thread storing and thread advancing device.
  • a drawing device generally comprises two thread storing and thread advancing devices, the first of which delivers the thread at a low speed while the second takes it up at a high speed.
  • This invention relates to the low speed or feed devices, and will be better understood with reference to the drawing shows in lateral elevational view an improved feed device according to the invention.
  • the main roller 10 is directly driven to rotate, while advancing roller generally indicated at 11 is an idler and is drawn into rotation by the thread itself, shown at 12a12b.
  • advancing roller generally indicated at 11 is an idler and is drawn into rotation by the thread itself, shown at 12a12b.
  • the particular constructional and assembling details of the rollers, their supports, the drive transmission etc. have no importance to the ends of the invention and therefore are not illustrated in the drawings.
  • the portion 12a of the thread travels at this latter speed, because it is influenced by no moving part other than the rollers of the feed device which directly actuates it.
  • the difference between the two distinct speeds of the thread is generally considerable.
  • the advancing or idler roller is caused to ice rotate at a speed that lies between the two aforesaid distinct speeds of the thread. Pronounced slippages occur under these conditions between roller 11 and thread, the turns of the thread overlap each other, the thread travels in a disorderly manner and is irregularly fed.
  • section 11a is generally almost as long as the main roller 10
  • section 11b is short and supports only the last few turns or even only the single last turn of the thread. It has been found that under such conditions the section 11b of the advancing roller rotates with the same linear speed as the section 12b of the thread and that the drawing effected on the thread is not felt beyond the zone of the main roller over which the last turn of thread travels before passing to the section 11b of the advancing roller; said zone of the main roller is illustrated in the drawing by the bracketed portion A. .To make certain that the drawing of the thread be completed within the aforesaid zone, the same may be provided with a surface adapted to generate considerable friction when the thread slides over it.
  • the present invention may be applied to the stretching of any type of single filaments as well as to stretching of bundles of filaments or slivers such as are produced for instance in the manufacture of spun fibres from any textile materials.
  • the surface of one or both rollers may be grooved, knurled or roughened in any way, or they may be smooth.
  • Thread storing and thread advancing device for the drawing of filaments or bundles of filaments, comprising two rollers having their axes askew to one another for storing and advancing the filaments in a plurality of spiral turns, one of said rollers being driven end the other being an idler, said idler roller comprising a plurality of separately rotatable sections following one another in an axial direction and separately operable at different peripheral speed, each section being driven to rotate by the spiral turn of the filaments engaging said section, and at a pcripheral speed equal to the linear speed of said spiral turn.
  • the driven roller is provided with a surface having a high friction coefiicient with respect to the filaments, whereby the cold drawing of said filaments is substantially completed in the section of said roller over which they travel for the last time before passing to the last section of the idler roller, so that all the spiral turns of the thread that are not supported by the aforementioned last section of the driven roller travel substantially at the same linear speed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US413412A 1953-03-07 1954-03-01 Thread storing and thread advancing device comprising an idler advancing roller Expired - Lifetime US2883733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT739833X 1953-03-07

Publications (1)

Publication Number Publication Date
US2883733A true US2883733A (en) 1959-04-28

Family

ID=11315437

Family Applications (1)

Application Number Title Priority Date Filing Date
US413412A Expired - Lifetime US2883733A (en) 1953-03-07 1954-03-01 Thread storing and thread advancing device comprising an idler advancing roller

Country Status (5)

Country Link
US (1) US2883733A (nl)
BE (1) BE526991A (nl)
FR (1) FR1094219A (nl)
GB (1) GB739833A (nl)
NL (2) NL185657B (nl)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559900A (en) * 1968-03-06 1971-02-02 Fuij Photo Optical Co Ltd Fiber-aligning device
US3785018A (en) * 1970-11-10 1974-01-15 Celanese Corp Hot stepwise drawing with independent free-wheeling idler rolls
US3890422A (en) * 1973-08-09 1975-06-17 Du Pont Method of drawing yarn using a plurality of separator rolls with each driven roll
US3932854A (en) * 1971-05-18 1976-01-13 Imperial Chemical Ind. (Europa) Fibres Apparatus for the detection of breaks in moving threadlines
US4388141A (en) * 1979-09-28 1983-06-14 Levi Strauss & Co. Apparatus for fusing strips
US4659033A (en) * 1983-06-14 1987-04-21 Preload Concrete Structures, Inc. Apparatus for prestressing concrete structures or the like

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559900A (en) * 1968-03-06 1971-02-02 Fuij Photo Optical Co Ltd Fiber-aligning device
US3785018A (en) * 1970-11-10 1974-01-15 Celanese Corp Hot stepwise drawing with independent free-wheeling idler rolls
US3932854A (en) * 1971-05-18 1976-01-13 Imperial Chemical Ind. (Europa) Fibres Apparatus for the detection of breaks in moving threadlines
US3890422A (en) * 1973-08-09 1975-06-17 Du Pont Method of drawing yarn using a plurality of separator rolls with each driven roll
US4388141A (en) * 1979-09-28 1983-06-14 Levi Strauss & Co. Apparatus for fusing strips
US4659033A (en) * 1983-06-14 1987-04-21 Preload Concrete Structures, Inc. Apparatus for prestressing concrete structures or the like

Also Published As

Publication number Publication date
NL185657B (nl)
FR1094219A (fr) 1955-05-16
NL80692C (nl)
GB739833A (en) 1955-11-02
BE526991A (nl)

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