US3708832A - Method for leveling tow - Google Patents

Method for leveling tow Download PDF

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Publication number
US3708832A
US3708832A US00062393A US3708832DA US3708832A US 3708832 A US3708832 A US 3708832A US 00062393 A US00062393 A US 00062393A US 3708832D A US3708832D A US 3708832DA US 3708832 A US3708832 A US 3708832A
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US
United States
Prior art keywords
tow
filaments
band
engagement
tow band
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
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US00062393A
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English (en)
Inventor
J Lohrke
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.)
Warner and Swasey Co
Turbo Machine Co
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Turbo Machine Co
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Publication date
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Publication of US3708832A publication Critical patent/US3708832A/en
Assigned to WARNER & SWASEY COMPANY, THE reassignment WARNER & SWASEY COMPANY, THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WARNER & SWASEY COMPANY,THE A DEL CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • D02J1/18—Separating or spreading

Definitions

  • ABSTRACT A device is provided acting upon a multifilament continuous filament tow band to improve the levelness of the tow band prior to further processing by intermittently transversely displacing some, but not all of the filaments of said tow at different locations across the tow band and allowing a sufficient tow path line of travel to allow the filaments to achieve new equilibrium locations with respect to each other.
  • This invention relates to an apparatus and method for handling a textile material such as filamentary tow, and more particularly, for distributing the filaments in continuous filament tow uniformly in a transverse section of the tow band, hereinafter referred to as leveling.”
  • the tow is comprised of a plurality of continuous synthetic filaments normally crimped and the crimps are normally in registration.
  • a number of devices have been provided by the prior art for de-registering crimp and this invention is not concerned with such de-registration; nor is this device concerned with blooming of the tow sheet. Rather, it is concerned with achieving improved uniformity of levelness of the transverse cross section of the tow band.
  • a beater is provided in the tow creel mounted for rotation in a direction opposite the direction of the travel of the tow band.
  • the beater has a plurality of preferably cylindrical rods thereon axially positioned transverse to the path of travel of the tow band. These rods have grooves extending partially about their circumference, said grooves being preferably uniform V-grooves. The crests of the grooves from one rod to the next rod of the beater are axially out of phase with each other.
  • the tow is maintained under some tension by means of running it through a plurality of bars. It is most preferable to have a tension bar on either side of the beater in close proximity therewith as will be explained hereinafter.
  • the beater is rotated so that the grooved rods are brought into contact with the tow band and the crests penetrate the tow band thereby dividing it into a number of bundles of filaments.
  • the crests make new, distinct penetrations in the tow band due to the axial displacement of the crests from one rod to the next, thereby dividing the tow band into new bundles of filaments. With each penetration into the tow band, some,
  • FIG. 1 is a perspective view of an apparatus in accordance with the preferred embodiment of this invention.
  • FIG. 2 is a plan view partially broken away of a portion of the apparatus shown in FIG. 1 with the tow band removed;
  • FIG. 3 is a section taken as indicated by the lines and arrows 3-3 in FIG. 2'with the tow band inserted and with a portion of the apparatus of FIG. 1 shown in' phantom, and with alternate positions of the tow band and apparatus of FIG. 2 shown in phantom; and
  • FIG. 4 is an enlarged view of that portion of the apparatus designated 4 in FIG. 2 illustrating diagramatically the phase relation between the successive grooves in that portion of the apparatus.
  • FIG. 1 shows a portion of a frame of a creel designated generally 10 of an apparatus used for guiding a tow band from a carton (not shown) to a machine (not shown) for processing.
  • the frame includes a plurality of guide bars 12, 14, 16, 18, 20 and 22 which are fixedly mounted thereto for guiding the tow 24 as it comes from the carton and as it is delivered downstream.
  • the tow 24 is composed of a plurality of continuous filament synthetic strands which may or may not be crimped. The strands lie in a band or sheet which is drawn out rather flat like a tape as it is passed over and under the guide bars. Further, the guide bars have the effect of tensioning the tow band as it advances in the direction of the arrows.
  • a plurality of heaters 26 and 28 mounted for rotation in response to any convenient mode of power transmission means on centrally located shafts 31, 29 respectively, disposed in bearings as at 30, 32 and 34, 36 respectively, mounted on the frame 10.
  • a power transmission means is illustrated by the motor 38 which has an output drive shaft 39 having mounted thereon a pulley 40 with a belt 41 transmitting power to a pulley 42 on the end of the shaft 29 for rotating the shaft in the direction of the arrow.
  • a pulley 43 which has disposed about it a belt 44 which is also disposed about a pulley 45 on the end of the shaft 31, so that as the pulley 43 rotates with the shaft 29, the pulley 45 rotates in the direction of the arrow thereon and drives the shaft 31.
  • the beaters 26 and 28 are thus driven in the direction of the arrows thereon, opposite to the direction of travel of the tow band 24 as indicated by the arrows thereon.
  • FIG. 1 a plurality of beaters are shown since this represents the most preferred embodiment of this invention. However it will be understood that the invention can be practiced with a single beater or even more than two beaters. I will now describe in detail one of the beaters shown, since the heaters are similarly constructed.
  • the beater 26 is shown in greater detail in FIG. 2 and consists of a pair of end plates or discs 50 and 52 fixed on the axial shaft 31 by means of hubs 54 and 56 respectively for rotation therewith.
  • Fixedly mounted between the end plates are a plurality of preferably cylindrical bodies or rods, each of which has a grooved surface.
  • the grooves are preferably uniform at least partially circumferential V-grooves as 62, 63.
  • the V- grooves are spaced along substantially the entire length of the rods 58, 59 and 60. Both the crests and roots of the grooves are preferably sharp and the grooves are continuous, smooth arcuate surfaces in the circumferential direction.
  • the rods are arranged so that the grooves are transversely out of phase as more clearly shown in the enlargement of FIG. 4.
  • the grooves on rod 58 are not aligned with the grooves on rod 59 and the grooves on both of these rods are not aligned with the grooves on rod 60.
  • their crests and roots are axially out of phase with one another from rod to rod transversely of the direction of movement of the tow.
  • the crest 65 on rod 58 in FIG. 4 is misaligned with the crest 67 on rod 59 so that line A drawn through the crest 65 passes to the left of the crest 67.
  • the crest 71 on rod 60 is also misaligned or out of phase with respect to the crest 65 as can be seen by the line A passing through the crest 65 and to the right of the crest 71. Likewise, crest 71 is out of line with the crest 67.
  • each beater there are preferably three such rods on each beater and there are most preferably two heaters in the creel, one spaced downstream from the other longitudinally.
  • the beaters are rotated and the rods engage the tow band 24 in the manner shown in FIG. 3.
  • the rod 59 has engaged one transverse surface of the tow band and has diverted it from its normal vertical course between the guide bars 14 and 16. To a certain extent then it has tensioned the tow.
  • the crest 73 of the rod 59 passed through the tow sheet with the effect that it is divided into a plurality of filamentary bundles. Since the guide bars 14 and 16 are in close proximity with the beater 26, the bundles are spread to the greatest degree as they pass over rod 59 and tend to come together at both the bar 14 and the bar 16. As the beater 26 continues to rotate the rod 59 moves to the position shown in phantom in FIG. 3 and a second rod 60 engages the tow band. It must be remembered that the tow band is moving during this time, so that the filament bundles are to some extent traversing and changing position on the bar l6.
  • the crests of the rod 60 will engage the tow bundles and redivide them. This results from the out of phase relation of the grooves on successive rods and is madeeven more positive by the close proximity of the bar 16 to the beater 26 which tends to maintain the transverse tow band width.
  • V-shaped smooth arcuate grooves provide for particularly smooth entry and withdrawal of the crests in separating the tow into bundles, so that snags are avoided.
  • While a rotating beater with grooved rods has been described as the preferred embodiment of the invention, othermeans can be used to achieve the separation and lateral redistribution of the filiments in the tow band.
  • One such means is a number of air jets located transversly across the tow band regulated in such a manner to perform the same function as the crests of the rods.
  • a flat blade (or blades) with V-shaped sharp toothed serrations could be used to penetrate the tow band at differing transverse locations to create the same effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
US00062393A 1970-08-10 1970-08-10 Method for leveling tow Expired - Lifetime US3708832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6239370A 1970-08-10 1970-08-10

Publications (1)

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US3708832A true US3708832A (en) 1973-01-09

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ID=22042187

Family Applications (1)

Application Number Title Priority Date Filing Date
US00062393A Expired - Lifetime US3708832A (en) 1970-08-10 1970-08-10 Method for leveling tow

Country Status (5)

Country Link
US (1) US3708832A (es)
DE (1) DE2125711A1 (es)
ES (1) ES390353A1 (es)
FR (1) FR2103963A5 (es)
GB (1) GB1326679A (es)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120079A (en) * 1977-10-11 1978-10-17 Tokyo Institute Of Technology Tow opening apparatus
US4179776A (en) * 1977-09-19 1979-12-25 Harold Wortman Method and apparatus for deregistering and processing an open synthetic tow into fiber-filled articles
US4760617A (en) * 1985-08-02 1988-08-02 Basf Aktiengesellschaft Level dyeing of a filament bundle with a dye solution
US5101542A (en) * 1989-04-05 1992-04-07 Ube Industries, Ltd. Fiber separator for producing fiber reinforced metallic or resin body
US5214828A (en) * 1990-04-04 1993-06-01 Hoechst Process and apparatus for guiding a tow
US6385828B1 (en) * 2001-08-28 2002-05-14 Zoltek Companies, Inc. Apparatus and method for splitting a tow of fibers
USRE38652E1 (en) 1992-08-20 2004-11-16 Velcro Industries B.V. Hook for hook and loop fasteners
US20150259832A1 (en) * 2011-12-22 2015-09-17 Teijin Limited Method for manufacturing reinforcing fiber strand
WO2017212234A1 (en) * 2016-06-07 2017-12-14 Gerard Fernando Fibre spreading
US20180100251A1 (en) * 2016-10-06 2018-04-12 Izumi International, Inc. Process and apparatus for expanding multiple filament tow
US10876224B2 (en) 2017-07-06 2020-12-29 Karl Mayer Technische Textilien Gmbh Device and method for spreading a fiber bundle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087778A (ja) * 1983-02-01 1985-05-17 ハウニイ−ウエルケ・ケルベル・ウント・コンパニイ・コマンデイ−トゲゼルシヤフト タバコ加工工業に用いられるフイルタロツドを製造する方法及び装置
DE102011112369A1 (de) * 2011-09-02 2013-03-07 Power-Heat-Set Gmbh Vorrichtung zur aktiven Trennung der Fäden eines Garnbündels in einzelne Fäden

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822582A (en) * 1953-11-23 1958-02-11 Courtaulds Ltd Apparatus for processing filamentary tows
US3254373A (en) * 1963-10-10 1966-06-07 Eastman Kodak Co Tow blooming
US3340576A (en) * 1966-04-05 1967-09-12 Eastman Kodak Co Method for blooming tow

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822582A (en) * 1953-11-23 1958-02-11 Courtaulds Ltd Apparatus for processing filamentary tows
US3254373A (en) * 1963-10-10 1966-06-07 Eastman Kodak Co Tow blooming
US3340576A (en) * 1966-04-05 1967-09-12 Eastman Kodak Co Method for blooming tow

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179776A (en) * 1977-09-19 1979-12-25 Harold Wortman Method and apparatus for deregistering and processing an open synthetic tow into fiber-filled articles
US4120079A (en) * 1977-10-11 1978-10-17 Tokyo Institute Of Technology Tow opening apparatus
US4760617A (en) * 1985-08-02 1988-08-02 Basf Aktiengesellschaft Level dyeing of a filament bundle with a dye solution
US5101542A (en) * 1989-04-05 1992-04-07 Ube Industries, Ltd. Fiber separator for producing fiber reinforced metallic or resin body
US5214828A (en) * 1990-04-04 1993-06-01 Hoechst Process and apparatus for guiding a tow
USRE38652E1 (en) 1992-08-20 2004-11-16 Velcro Industries B.V. Hook for hook and loop fasteners
US6385828B1 (en) * 2001-08-28 2002-05-14 Zoltek Companies, Inc. Apparatus and method for splitting a tow of fibers
US20150259832A1 (en) * 2011-12-22 2015-09-17 Teijin Limited Method for manufacturing reinforcing fiber strand
US9528200B2 (en) * 2011-12-22 2016-12-27 Teijin Limited Method for manufacturing reinforcing fiber strand
WO2017212234A1 (en) * 2016-06-07 2017-12-14 Gerard Fernando Fibre spreading
US11060213B2 (en) 2016-06-07 2021-07-13 Gerard Fernando Fibre spreading
US11802354B2 (en) 2016-06-07 2023-10-31 Gerard Fernando Fibre spreading
US20180100251A1 (en) * 2016-10-06 2018-04-12 Izumi International, Inc. Process and apparatus for expanding multiple filament tow
US10151053B2 (en) * 2016-10-06 2018-12-11 Izumi International, Inc. Process and apparatus for expanding multiple filament tow
US10876224B2 (en) 2017-07-06 2020-12-29 Karl Mayer Technische Textilien Gmbh Device and method for spreading a fiber bundle

Also Published As

Publication number Publication date
FR2103963A5 (es) 1972-04-14
ES390353A1 (es) 1973-06-01
GB1326679A (en) 1973-08-15
DE2125711A1 (de) 1972-02-17

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AS Assignment

Owner name: WARNER & SWASEY COMPANY, THE, 11000 CEDAR AVENUE,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WARNER & SWASEY COMPANY,THE A DEL CORP.;REEL/FRAME:004365/0760

Effective date: 19850116