Apparatus and method for commingling continuous multifilament yarns

Abstract

Improving commingling two or more continuous multiple filament yarns into a single yarn by rubbing one yarn against a static charge-inducing body that is supported in an electrically isolated manner to apply static charge to the yarn to tend to cause separation of its individual multiple fliaments. Also disclosed is commingling apparatus in which individual filaments of a multiple filament yarn are spread from each other in an enclosure that contains a source of the multiple filament yarn and has a yarn exit opening through which the filaments leave the enclosure in a separated state, a vacuum source being to connected to an air removal opening so that air flows through and around the yarn at a direction transverse to the yarn to cause apreading of the filaments, the yarn from the source passing through a guide and a weighted dancer whose movements up and down (in response to changes in tension in the yarn) control a positive feed drive for the yarn source. Also disclosed is apparatus for commingling different multiple filament yarns that includes a plurality of sources of one kind of multiple filament yarn and a plurality of tension adjustment devices for each individual yarn to reduce differences in tension among the yarns as they are presented as a flattened ribbon and combined with a flattened ribbon of a different type of yarn.

Dependencies are inferred from the claim text.