US3685109A - Small denier stuffer crimper and method - Google Patents

Small denier stuffer crimper and method Download PDF

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Publication number
US3685109A
US3685109A US45307A US3685109DA US3685109A US 3685109 A US3685109 A US 3685109A US 45307 A US45307 A US 45307A US 3685109D A US3685109D A US 3685109DA US 3685109 A US3685109 A US 3685109A
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United States
Prior art keywords
yarn
chamber
feed rolls
crimped
bite
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Expired - Lifetime
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US45307A
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English (en)
Inventor
Eugene Torello-Viera
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Joseph Bancroft and Sons Co
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Joseph Bancroft and Sons Co
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes

Definitions

  • ABSTRACT A stuffer crimper for small denier yarns having feed rolls of from 1.0 to 1.26 inches in diameter and an angle between the radii to the bite and to the wiping edge of the saddle in the plane of the end of the traverse of 38 to 29, respectively. This dimension if achieved by providing a yarn traverse across the bite of the feed rolls that leaves a 0.05-inch clearance from the edges.
  • An object is to provide a stuffer crimper adapted for use with small denier multifilament yarns which is designed and arranged to prevent or minimize breakage of the filaments in the zone between the bite and the crimping tube saddle.
  • Another object is to prevent the breakage of filaments by being pinched between the feed rolls and the adjacent edge of the saddle.
  • filament bundles particularly when in the untwisted state or having a low twist such as a producers twist of less than one turn per inch, flower out in all directions adjacent the bite of the feed rolls as they are folded over and .become crimped and the outside filaments tend to become pinched between the feed roll and the saddle with consequent tendency towards looping and breakage. This occurs particularly at the limits of the traverse movement where such filaments are close to the edge of the feed roll and to the wiping surface of the saddle.
  • the size of the filaments the number of filaments in the.
  • FIG. 1 is a vertical section through a stuffer crimper embodying the invention
  • FIG. 2 is a broken side elevation of a portion of the stuffer crimper of FIG. 1;
  • FIG. 3 is a section taken on the line 3-3 of FIG. 2 but on a much larger scale
  • FIG. 4 is a section taken on the line 4-4 of FIG. 3 showing the spacing between the bite and the wiping edge of the saddle.
  • the crimper is shown as having a crimping and setting tube forming the crimping and setting chamber and secured in a heater block 11 having a plurality of heating elements 12 disposed therein.
  • a pair of feed rolls l4 and 15 is disposed to feed a bundle 16 of filaments for crimping into the tube 10.
  • traverse roll 17 having a traversing guide 18 is disposed to guide the filament bundle 16 into the bite of the feed rolls l4 and 15 and to traverse the bundle laterally along the bite between extreme positions indicated at 19 and 20.
  • the distance between the points 19 and 20 and the adjacent edges of the feed rolls is designated as 22.
  • the tube 10 communicates with a saddle 30 having a bore corresponding to or slightly less than that of the tube 10 and having its lower end milled out to seat around the bite and having flanks extending over the end surfaces of the rolls 14 and 15 and having a running clearance therewith.
  • the crimped yarn within the tube 10 forms a core 32 from the upper end of which the yarn is withdrawn through an opening 33 in a tube cap 34.
  • a sensing device in the form of a slug 35 rests on the top of the core 32 in the tube 10 to rise and fall therewith.
  • the sensing device 35 includes elements 37 extending outwardly through slots 38 in the tube 10.
  • a microswitch 40 is carried by a bracket 41 which is adjustably secured to the tube 10 and has an actuating arm 42 which extends around the tube 10 and rests upon and is actuated by the outwardly protruding elements 37 as they rise and fall.
  • the microswitch is connected to control the rate of the feed rolls or of the delivery rolls or winder, not shown, in a sense to maintain the top of the core of crimped yarn at a substantially constant level in the tube 10.
  • the angle between the radii to the bite and to the point 24 is designated as the angle A.
  • the crimper in accordance with this invention is specifically designed for use with filament bundles of small denier, such as nylon or polyester bundles or yarns of from 40 to 200 denier which may be composed of a large number of individual filaments and may have a degree of twist of less than one turn per inch. It is especially suited for the crimping of polyester or other yarns having low filament elongation at break.
  • the traverse roll 17 has a throw adapted to leave a spacing 22 between the filaments at each end of the throw and the corresponding edges of the rolls at the bite of at least 0.05 inch.
  • the minimum inside diameter of the crimping tube should be 0.27 inch.
  • the feed rolls must have a width sufficient to span the inside diameter of the tube yet have a running clearance with the wiping edge and flanks of the saddle, and the extreme traverse of the yarn should be approximately 0.05 inch from the edge of the feed rolls.
  • This provides for an angle A of approximately 29 which is the minimum angle necessary to provide the spacing between the bite and the wiping edge of the saddle which is required to avoid pinching of the yarn between the surface of the feed rolls and the wiping edge of the saddle.
  • the minimum angle A becomes approximately 38.
  • a further feature of the invention is the redistribution of the factors that contribute to the bulk level of 40 to 200 denier continuous multifilament nylon or polyester crimped yarn of less than one turn of twist per inch which results in an improved yarn characterized by fewer faults per yard at any given bulk level than in such previously known stuffer crimped yarns.
  • This is primarily the result of the clearance of at least 0.05 inch between the yarn at the ends of the throw and the ends of the feed rolls combined with the saddle diameter of at least 0.27 inch as explained above which causes the core of crimped yarn to be less tightly packed against the chamber walls, but still supportable thereby, and thus advance along the chamber with less friction than if the above clearances and diameters were of lesser value.
  • these values provide for a reduced wall to yarn friction ratio in and of itself compared to previously known apparatus. With this reduced amount of friction, the yarn folds over and crimps at longer intervals which results in longer leg lengths in the crimped filaments.
  • the yarn of this invention is characterized by longer leg lengths and tighter crimp angles than previously known stuffer crimped yarn of similar deniers.
  • the backweight exerted on the end of the core of crimped yarn in the chamber constitutes at least 33 percent and 45 percent factors in the total bulk level of such stuffer crimped polyester and nylon yarns, respectively. This was determined to be the case in trials conducted on commercially available nylon and polyester yarns having less than one turn of twist per inch in a denier range of from 40 to 200 in a crimping apparatus of the above mentioned dimensions and in which the length of the chamber was at least 20 times its diameter in bulk level ranges of percent 28 percent and 18 percent 35 percent on polyester and nylon yarns respectively.
  • the trials consisted of measuring the bulk level of the yarns when crimped without any backweight and comparing them to similar yarns crimped with a backweight calculated to give the bulk levels in the ranges aforementioned.
  • the bulk levels were determined by winding a predetermined number of yards of the crimped yarn on a 54 inch skein reel, removing the wound skein from the reel, suspending the skein on a rod in an oven under a 1% oz. tension for 5 minutes, removing the yarn from the oven and measuring the percent shrinkage in length of the skein. For example, on 40 denier yarns of polyester and nylon, 185 yards were wound into skeins and put into ovens for 5 minutes under the onehalf oz. tension.
  • a fault is defined as a broken filament or a filament having an undesirable loop, kink or being disarranged from the yarn bundle.
  • the test for determining faults involves running yarn at 6 yards per minute for 20 minutes yards) under a 4-5 gram tension. Loops, kinks or disarranged filaments are considered independent faults when they are spaced further from each other than their individual length along the yarn.
  • a filament was considered a kink, loop or disarranged filament when it stuck out from the yarn bundle more than the thickness of the yarn bundle itself.
  • a 40 denier, l3 filament nylon yarn having a twist of less than one turn per inch crimped as above was found to have an average of not over 0.4 faults per yard as compared with 2.4 faults per yard in such previously known stuffer crimped yarn.
  • a stuffer crimper for use with filament bundles of 40 to 200 denier comprising a member forming a crimping and setting chamber, a pair of feed rolls having end surfaces and forming a bite disposed to feed a' filament yarn into one end of said chamber to be folded over and crimped therein against a core of previously crimped yarn, said crimping chamber including a saddle.
  • said traverse guide driven to traverse the yarn laterally across approximately the full bite of said rolls as it is fed thereto for crimping, said traverse guide having a throw less than the inside diameter of the saddle and related to the width of said feed rolls to provide a minimum clearance of 0.05 inch between the filaments at the ends of the throw and the corresponding ends of the feed rolls at the bite whereby the crimped yarns is less tightly packed against the chamber walls and thus advances along said chamber with less friction.
  • a stuffer crimper as set forth in claim 1 in which the diameters of said feed rolls are in the range of 1.0 to 1.26 inches and the angle between the feed roll radii to the bite and to the wiping edge of the saddle in the plane of the end of the traverse is from 38 to 29, respectively, whereby the filaments are prevented from becoming pinched between said rolls and said saddle.
  • the saddle has an internal diameter of at least 0.27 inch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US45307A 1970-06-11 1970-06-11 Small denier stuffer crimper and method Expired - Lifetime US3685109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4530770A 1970-06-11 1970-06-11

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US3685109A true US3685109A (en) 1972-08-22

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US45307A Expired - Lifetime US3685109A (en) 1970-06-11 1970-06-11 Small denier stuffer crimper and method

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US (1) US3685109A (enrdf_load_stackoverflow)
CA (1) CA940286A (enrdf_load_stackoverflow)
CH (5) CH855671A4 (enrdf_load_stackoverflow)
DE (1) DE2128838A1 (enrdf_load_stackoverflow)
ES (3) ES392083A1 (enrdf_load_stackoverflow)
FR (1) FR2096235A5 (enrdf_load_stackoverflow)
GB (1) GB1361992A (enrdf_load_stackoverflow)
IL (1) IL37036A (enrdf_load_stackoverflow)
NL (1) NL7107985A (enrdf_load_stackoverflow)
ZA (1) ZA713745B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722042A (en) * 1972-01-31 1973-03-27 Techniservice Corp Strand treatment
US3894319A (en) * 1973-06-01 1975-07-15 Indian Head Inc Apparatus for texturing continuous filament yarn
US3921380A (en) * 1974-05-31 1975-11-25 Indian Head Inc Crimped continuous filament yarn and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925976A (en) * 1973-06-01 1975-12-16 Indian Head Inc Method and apparatus for texturing continuous filament yarn
EP2792772B1 (fr) * 2013-04-18 2016-09-07 SUPERBA (Société par Actions Simplifiée) Dispositif d'alimentation de boîte à friser avec rouleau d'entrée
CN115418763B (zh) * 2022-09-13 2024-11-15 东华大学 保持展丝宽的转向外喂包缠复合结构纺装置与方法及用途

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722042A (en) * 1972-01-31 1973-03-27 Techniservice Corp Strand treatment
US3894319A (en) * 1973-06-01 1975-07-15 Indian Head Inc Apparatus for texturing continuous filament yarn
US3921380A (en) * 1974-05-31 1975-11-25 Indian Head Inc Crimped continuous filament yarn and method

Also Published As

Publication number Publication date
ES392083A1 (es) 1974-05-01
CH551510A (fr) 1974-07-15
DE2128838A1 (de) 1971-12-16
ES423782A1 (es) 1976-09-16
ZA713745B (en) 1972-03-29
NL7107985A (enrdf_load_stackoverflow) 1971-12-14
FR2096235A5 (enrdf_load_stackoverflow) 1972-02-11
CA940286A (en) 1974-01-22
CH750572A4 (enrdf_load_stackoverflow) 1976-12-15
CH588577B5 (enrdf_load_stackoverflow) 1977-06-15
CH855671A4 (enrdf_load_stackoverflow) 1976-12-15
CH588576B5 (enrdf_load_stackoverflow) 1977-06-15
ES396742A1 (es) 1974-12-01
IL37036A (en) 1974-01-14
GB1361992A (en) 1974-07-30
IL37036A0 (en) 1971-08-25

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