Former head with adjustable needle rollers

Details Former head with adjustable needle rollers Former head with adjustable needle rollers

2007-04-03

2007-04-03

Welch, Gary L. (Department: 3765)

Textiles: fiber preparation

Assembling

Web forming

Reexamination Certificate

active

10487340

ABSTRACT:
A former head allows processing of long fibers while achieving a carding action and a fibre distribution fulfilling high quality standards. The former head contains at least one needle roller. A mixture of air and fibers are injected above the horizontal plane of a center axis of the needle roller and directly onto a periphery of the needle roller. There may be a number of adjustable needle rollers. With a former head, where fibers and air are injected in a controlled and new way, it is possible to process longer fibers and maintain a high distribution quality. By using a number of adjustable needle rollers, the fibre material can go through a carding process during the distribution. This carding process is optimized by the needles injecting onto the periphery of the stationary needle roller as well as the subsequent contact with the adjustable needle rollers.

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patent: 168957 (1986-01-01), None
patent: 2141150 (1984-12-01), None
patent: WO 86/00097 (1986-01-01), None
patent: WO 99/36623 (1999-07-01), None

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