Foraminous surface means in a thermoplastic yarn rebound texturizing apparatus

Claim 1

In bounce crimping apparatus for texturizing multi-filament thermoplastic yarn including; a yarn texturizing chamber having an inlet, a fluid outlet aligned with said inlet and a lateral yarn outlet, means for introducing a heated fluid into said yarn texturizing chamber for drawing yarn into said chamber, a foraminous surface transversely positioned across said fluid outlet of said chamber, said heating fluid introduced into said chamber for drawing yarn into said chamber further serving to hurl the yarn against said foraminous surface to axially compress and crimp the yarn filaments and rebound the yarn through said lateral outlet of said yarn texturizing chamber, platen means underlying said foraminous surface for supporting said foraminous surface against said fluid outlet of said yarn texturizing chamber, and means for collecting the crimped yarn while maintaining the yarn substantially free from longitudinal tension, the improvement comprises: said foraminous surface, including an upper screen portion operable to overlie at least a portion of said platen means for rebounding yarn to be texturized while simultaneously permitting passage of said heating fluid, and a downwardly projecting locator tab connected to said upper screen surface for engagement with said underlying platen to fixedly and reliably orient said upper screen surface with respect to said lateral outlet of said yarn passage chamber wherein the preferred texture of said upper screen surface is reliably and accurately oriented in a direction parallel with the axis of said lateral outlet of said yarn passage chamber.