G - Physics – 05 – D
Patent
G - Physics
05
D
341/47
G05D 3/12 (2006.01) D01G 15/46 (2006.01) D01G 25/00 (2006.01) D01G 31/00 (2006.01) D04H 1/74 (2006.01) G05D 5/03 (2006.01)
Patent
CA 2006448
- 19 - ABSTRACT It is desired to detect and to compensate position errors occurring during the manufacture of a web consisting of a multilayer non-woven fabric by means of a laying machine, in which a web consisting of a monolayer non-woven fabric is supplied to a conveyor belt transversely to the direction of travel of said belt and is laid onto said belt by a reciprocating motion to form a multilayer web. For that purpose, the measured value signal is analyzed by machine, preferably by a Fourier transformation, for errors consist- ing of periodically occurring fluctuations of the signal amplitude and the velocity of the conveyor belt and/or the velocity at which the monolayer non-woven web is supplied and/or the width in which the monolayer non-woven web is supplied and/or the width in which the non-woven web is laid onto the delivering belt are automatically controlled to minimize the periodic fluctuations of the signal amplitude.
Erhardt Dietmar
Marks & Clerk
LandOfFree
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