Method and device for starting up injector nozzles
AssigneeHoechst Aktiengesellschaft
InventorsHans-Jurgen Strutz, Ingolf Jacob
Life of this patent
Estimating the term…
Abstract
To facilitate the introduction of running yarns into injector nozzles the cross section of the inlet openings of the said nozzles are enlarged before the yarns are laid in, the yarns are sucked into the enlarged openings and subsequently the openings are reduced to their initial dimensions. The injector nozzles are preferably used in jet stufferbox texturizing processes or with suction guns. Without special threading aids, yarns and threads supplied at high speed are sucked in automatically and conveyed into spaces under elevated pressure.
Claims13
A process for introducing one or several threads into an injector nozzle, having a sucking inlet opening or openings through which a flow of motive fluid transports the threads, which comprises introducing the threads to the sucking inlet opening or openings, arranging the cross-sectional area of the sucking inlet opening or openings, a finite amount larger than the normal thread transporting size, causing the motive fluid to flow through the nozzle whereby the threads are sucked through the finitely larger sucking inlet opening or openings to insert them into the nozzle, and reducing the cross sectional area of said inlet opening or openings to their transporting size for transporting the threads through the nozzle.
An injector nozzle for conveying and drawing off threads and yarns comprising
- a. a casing with a supply conduit for the motive fluid, an inner impulse transmission zone and an outlet for the transported material,
- b. an inner part with at least one inlet channel for the thread with inlet opening and means to enlarge said inlet opening for threading by suction and to reduce the size of the opening to the normal state of transportation,
- c. the casing has a conical part, a conical nozzle needle disposed within the conical part of the casing and interspace between them, with supply of the motive fluid through the interspace between the conical part of the casing and the conical nozzle needle, and
- d. the nozzle needle comprises two concentric elements, the inner element which is provided with an inlet channel for the thread being constructed and arranged for removal from the needle during the suction step.
Dependencies are inferred from the claim text.