Method and device for forming a longitudinal fiber web
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United States of America Patent
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Jan 17, 2006
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N/A
app pub date -
Oct 21, 2002
filing date -
Apr 20, 2000
priority date (Note) -
Expired
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Abstract
The invention describes a method and a device (101) for producing a longitudinal fiber web (100), in which fibers (2) are continuously applied, in the longitudinal direction, to a substrate web (6). In a pretreatment section, a relatively high tensile force (F) has to be exerted on the fibers, resulting in a relatively great strain (ε). Before the fibers (2) are applied to the substrate web (6), the stress in the fibers is reduced. The drive for the fibers in the pretreatment section is separate from the drive for the substrate web, the transport velocity of the fibers in the pretreatment section being controlled separately as a function of the transport velocity of the substrate web, in such a manner that the transport velocity of the fibers in the relaxed state is substantially equal to the transport velocity of the substrate web in the relaxed state. The result is a longitudinal fiber web (100) which is substantially free of length differences and stress differences between the fibers (2) and the substrate web (6).
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