Other

Marcel Siegenthaler

Werner Graber

Christian Sporri

In a lap winding apparatus for producing a batt lap, the batt is wound onto a tube which is rotatable about a fixed axis and is driven by a revolving endless belt. The belt is arranged in a loop, formed between two deflecting rolls and is tensioned by a tensioning device. The tube which is rotatable about a fixed axis, as well as the two deflecting rolls are dimensioned, and positioned relative to each other, in such a manner that the loop at the beginning of the lap winding process embraces the tube over an initial minimum wrapping angle equal to, or larger than, 120&deg; and preferentially equal to, or larger than, 180&deg;. For generating a tensioning force depending on the lap diameter, the tensioning device is associated with a control device.

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Embrach, Switzerland

Marcel Siegenthaler