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US 10,538,409 B2Granted
Apparatus and method for regulating winding tension as function of bobbin diameter
OwnerSiddharth Lohiainventor
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OwnerSiddharth Lohiainventor
Estimating the term…
The invention discloses an apparatus for regulating winding tension as function of bobbin (2) diameter in a slit film tape or yarn (1) winder system carrying at least one automated winder. It comprises a dancing arm (3) equipped with a tension setting means or device (3B) which regulates the yarn tension. The inventive feature of the invention is that tension setting means (3B) is capable of changing resistance ‘R’ of the dancing arm (3) as a function of the bobbin (2) diameter ‘D’ during the winding process. The invention also provides a method for regulating winding tension as function of bobbin (2) diameter. The invention helps overcome a number of problems related to uniformness and consistency of package the fabric making industry is currently facing. It solves technical problem of winding bobbin throughout using same tension adjusted for dancing arm, resulting higher tension during unwinding at low bobbin sizes. It also helps reduce the necking or shrinkage of the fabric produced due to varying resultant winding tension.
An apparatus for regulating winding tension as function of bobbin (2) diameter in a slit film tape or yarn (1) winder system carrying a group of winders comprising at least one winder, said apparatus comprising a dancing arm (3), the instantaneous position (3F) of said dancing arm (3) and resistance R to movement of said dancing arm (3) being variable during the yarn winding operation, wherein said apparatus comprises a tension setting device/means (3B) for changing said resistance ‘R’ of the dancing arm (3) as a function of the bobbin (2) diameter ‘D’ during the winding process, and wherein said tension setting device/means (3B) is a pressure multiplexer capable of changing said resistance R in discrete steps, characterized in that in the case of the discrete-stepped pressure change, said pressure multiplexer is provided with at least two separate pressure lines (11A and 11B) and a pressure line selection switch, wherein only one pressure line (11A or 11B) is activated at any time using said switch and the pressure is transmitted to said dancing arm (3) for generating resistance R.
Dependencies are inferred from the claim text.