Claims
- 1. Apparatus for crimping textile strands, comprising means laterally confining such strand and having an entrance portion and an open-ended exit portion, means for feeding strand into the entrance portion, jet means for injecting fluid into the entrance portion for forwarding the strand at least partially through at least the entrance portion, and wherein the exit portion comprises a laterally confining circumferentially screen with the terminal part having a flared outlet portion.
- 2. Strand-crimping apparatus according to claim 1, including an intermediate portion joining the entrance and exit portions, the exit junction being larger in internal cross section than the entrance junction thereof.
- 3. Strand-crimping apparatus according to claim 1, including means for withdrawing crimped strand lengthwise from the terminal flared outlet screen of the exit portion.
- 4. A laterally confining chamber for compressive strand-crimping apparatus, comprising a generally cylindrical entrance end portion and conjoined thereto a fixed foraminous portion flaring outwardly to the exterior at the otherwise unconfined end thereof opposite the entrance end.
- 5. Strand crimping apparatus according to claim 4, wherein the flaring portion comprises a wall having a multiplicity of small bores from the interior to the exterior thereof.
- 6. Strand-crimping apparatus according to claim 5, wherein the bores are visible to the unaided eye only as a matte finish rather than as discrete openings.
- 7. In strand-crimping apparatus a laterally confining chamber comprising a generally cylindrical entrance end portion and conjoined thereto a fixed foraminous portion flaring outwardly to the end thereof opposite the entrance end, wherein an intermediate portion joins the entrance and exit portions and comprises a generally cylindrical portion then increases in internal cross-sectional area from the vicinity of the former portion to the vicinity of the latter portion.
- 8. Strand-crimping apparatus according to claim 7, wherein the increase in internal cross-sectional area includes at least one outwardly stepped region.
Parent Case Info
This is a continuation of application Ser. No. 405,262, filed Oct. 11, 1973, which was a continuation-in-part of my copending applications Ser. No. 343,644 filed Mar. 22, 1973, now U.S. Pat. No. 3,840,950, granted Oct. 15, 1974, and Ser. No. 376,890 filed July 5, 1973; the latter of which was a continuation-in-part of the former and of Ser. No. 124,213 filed Mar. 15, 1971, now U.S. Pat. No. 3,753,275, granted Aug. 21, 1973, which was a continuation-in-part of Ser. No. 822,429 filed May 7, 1969 and now U.S. Pat. No. 3,570,083, itself a continuation-in-part of my prior applications, Ser. No. 678,428, filed Oct. 26, 1967, (now U.S. Pat. No. 3,462,814) and Ser. No. 302,758, filed July 31, 1963 (now U.S. Pat. No. 3,376,622).
This invention relates to longitudinally compressive or stuffer crimping of textile strands, especially with the aid of an injected fluid to forward or aid in forwarding the strand within a laterally confining region wherein it is compressively crimped.
Numerous means and methods of bulking or crimping textile strands are well known, one of them being compressive or stuffer crimping, in which strands are fed longitudinally into a laterally confining region through which their passage is retarded sufficiently to result in buckling of incoming strands into crimped configuration. Injected fluid has been used to forward or assist in forwarding strands for compressive crimping therein but with some attendant difficulties, especially at or approaching the outlet end of the lateral confinement. The fluid force may not be dissipated smoothly enough to provide suitable strand transition from confinement to the exterior and may occasion undesirable configurational irregularities in the crimped strand. Such apparatus may be combined with strand-drawing apparatus to constitute a draw-crimper.
A primary object of the present invention is improved longitudinally compressive crimping of textile strands.
Another object is stuffer-crimping of textile strands without formation of undesired jet-induced strand configurations or degradation from excessive lateral compression or subsequent expansion.
A further object is provision of strand-crimping apparatus for accomplishing the foregoing objects.
Other objects of this invention, together with means and methods for attaining the various objects, will be apparent from the following description and the accompanying diagrams of a preferred embodiment and a modified embodiment thereof, which are presented by way of example rather than limitation.
US Referenced Citations (11)
Foreign Referenced Citations (1)
| Number |
Date |
Country |
| 919,390 |
Oct 1954 |
DT |
Related Publications (3)
|
Number |
Date |
Country |
|
376890 |
Jul 1973 |
|
|
124213 |
Mar 1971 |
|
|
302758 |
Jul 1963 |
|
Continuations (1)
|
Number |
Date |
Country |
| Parent |
405262 |
Oct 1973 |
|
Continuation in Parts (4)
|
Number |
Date |
Country |
| Parent |
343644 |
Mar 1973 |
|
| Parent |
343644 |
Mar 1973 |
|
| Parent |
822429 |
May 1969 |
|
| Parent |
678428 |
Oct 1967 |
|
Patent Grant
3978560
