Systems and methods for parent roll tail reduction
Described herein are methods and systems for reducing the tail on a parent roll. The system may comprise a web tail extending from a parent roll supported by an unwind stand. The system may further comprise one or more nozzles positioned below the web tail and configured to facilitate the rewinding of the web tail about the parent roll. The web tail may be rewound about the parent roll in a direction opposite to that which the web was initially wound about the parent roll. As a result, the length of the web tail extending from the parent roll may be reduced and is less likely to lengthen as the parent roll is ejected from the unwind stand.
1. A system for rewinding and reducing the length of a web tail, comprising:
a parent roll supported by an unwind stand, wherein the parent roll comprises a web wound in a first direction corresponding to the direction of rotation of the parent roll used to wind the web;
a web tail extending from the parent roll; and
a first nozzle positioned below the web tail and configured to expel a gas or liquid directed at the location where the web tail separates from the parent roll such that the gas or liquid impacts at least a portion of the web tail to cause the portion of the web tail to begin to move over the top of the parent roll in a second direction opposite the first direction.
2. The system of claim 1 , wherein the unwind stand comprises:
a drive system;
one or more rollers; and
one or more belts in contact with a parent roll,
wherein the belt is configured to impart a rotation to the parent roll.
3. The system of claim 2 , wherein the unwind stand is further comprised of ejection arms that support the parent roll during ejection.
4. The system of claim 3 , wherein the web tail is a paper web tail and the web is a paper web.
5. The system of claim 1 , further comprising one or more tail rollers that support the web tail.
6. The system of claim 5 , further comprising a splice area, wherein the tail rollers are configured to guide the web tail into the splice area.
7. The system of claim 1 , further comprising a second nozzle, the first and second nozzles operable to expel a gas or liquid, creating a stream that impacts the web tail.
8. The system of claim 1 , wherein the first nozzle is configured to expel the gas or liquid so as to rewind the web tail around the parent roll in the second direction.