Dual-drum winding machine
OwnerHerbert B. Kohlerinventor
Life of this patent
Estimating the term…
Abstract
A dual drum winding machine is provided for winding a web of material, e.g., textile material, around a central core. The winding machine is operable on a continuous basis and has a leading winding drum and a succeeding winding drum. The succeeding winding drum is positioned lower than the leading winding drum such that the succeeding winding drum supports a greater proportion of the weight of a forming web roll when the roll is in a winding position supported by both the leading and succeeding winding drums. A method of forming a web roll using the winding machine is also provided.
Claims31
A winding machine for winding a web of material around a central core to produce a web roll, said machine comprising a leading winding drum having a surface and a succeeding winding drum having a surface, said leading and succeeding winding drums being aligned and cooperating to support a web roll therebetween in a primary winding position such that in said primary winding position said web roll will contact said leading winding drum at a leading contact point and said succeeding winding drum at a succeeding contact point, said leading and succeeding winding drums being further arranged such that said leading contact point is located in a horizontal plane above said succeeding contact point, said machine further comprising pretensioning means for tensioning said web of material prior to reaching said primary winding position during operation of said machine, a first friction roller effective to retractably engage and press said core against said leading winding drum, and a second friction roller effective to retractably engage and press said web roll against both said leading and succeeding winding drums in said primary winding position.
A method for winding web material around a central core to produce a web roll, comprising the steps of:
- a) providing a winding machine comprising a leading winding drum having a surface and a succeeding winding drum having a surface, said leading and succeeding winding drums being aligned and cooperating to support a web roll therebetween in a primary winding position such that in said primary winding position said web roll will contact said leading winding drum at a leading contact point and said succeeding winding drum at a succeeding contact point, said leading and succeeding winding drums being further arranged such that said leading contact point is located in a horizontal plane above said succeeding contact point;
- b) providing a substantially cylindrical central core for winding said web material therearound to form a web roll;
- c) supporting said web roll in said primary winding position against both said leading winding drum and said succeeding winding drum;
- d) pretensioning said web of material prior to said web reaching said primary winding position;
- e) winding said web material onto said web roll in said winding position;
- and
- f) rotating said succeeding winding drum at a higher linear circumferential speed than said leading winding drum to thereby further tension said web of material as it is wound onto said web roll.
Dependencies are inferred from the claim text.