Method and apparatus for stuffing yarns
AssigneeRhone-Poulenc-Textile
InventorPierre Curtillat
Life of this patent
Estimating the term…
Abstract
A yarn-stuffing system is disclosed in which the yarn is drawn in and expanded by a pneumatic nozzle and the yarn and air are conducted longitudinally to a discharge zone remote from the nozzle. The air is vented laterally in the discharge zone while the yarn is inhibited in its discharge to be stuffed and is periodically released to emerge stepwise from the discharge zone. The preferred apparatus includes a constricted yarn-stuffing and discharge zone which is expandable to allow slip of the stuffed yarn until pressure is relieved behind the stuffed yarn and returns to its constricted position until the pressure again rises as a result of obstruction of the vent ports.
Claims8
The method of stuffing yarn comprisinng the steps of:
- a. injecting yarn into an elongated zone by means of a compressed fluid driving and agitating the yarn,
- b. confining the yarn and the fluid for travel longitudinally in said elongated zone,
- c. compacting the yarn into an accumulating stuffing,
- d. venting the fluid laterally from the elongated zone immediately upstream of the stuffing as the stuffing accumulates,
- e. blocking venting of the fluid progressively as the stuffing accumulates,
- f. expelling the accumulated stuffing abruptly as fluid pressure builds behind the stuffing to release the accumulated stuffing from the elongated zone so that the stuffing emerges peristaltically from the elongated zone and venting of the fluid is increased, and
A pneumatic yarn stuffer comprising
- a. a pneumatic injector nozzle having
- b. a yarn inlet and
- c. a fluid inlet and
- d. an outlet,
- e. an elongated chamber in closed communication with said nozzle outlet, said elongated chamber terminating in
- f. a constricted portion having an internal diameter less than the diameter of the elongated chamber, said constricted portion having
- g. an outlet for stuffed yarn aligned with the nozzle outlet and the elongated chamber, said constricted portion further having
- h. a plurality of lateral fluid vents upstream of the stuffed yarn outlet, and said constricted portion being flexible in the radial direction.
Dependencies are inferred from the claim text.