Method and apparatus for shortening the splice tail in a flying splice roll changer
AssigneeVits Maschinenbau GmbH
InventorErnst Klas
Life of this patent
Estimating the term…
Abstract
In a flying splice roll changer a splice tail occurs at the splice joint that may induce problems in a downstream processing station. The present invention is directed to shortening of the splice tail (2) by directing the paper web (1) around a deflection roller (3) so that the splice tail (2) is located on the outer face of the roller and extends radially under the action of centrifugal force while being optionally supported by air ejected from blowing nozzles (8, 9). The splice tail is then cut with a blade (7) located in the vicinity of the outer surface of the deflection roller (3) so that only an insignificant length of a few millimeters remains.
Claims15
In a method of effecting a flying roll change and shortening the splice tail which comprises the steps of:
- (a) taking up a paper web from a depleted roll upon approach of an end of the roll;
- and
- (b) pressing the taken-up paper web against a glue-covered initial portion of a new roll synchronized in speed with the depleted roll in a flying roll change, thereby forming a running paper web with a splice tail,
- (c) guiding the running paper web around a curved path with a center of curvature lying on a side of the paper web facing away from said splice tail so that said splice tail rises from said paper web by centrifugal force;
- and
- (d) cutting off the splice tail raised from said paper web close to said curved path.
In an unwinding apparatus for a paper web wherein the paper web is taken up from a depleted roll upon approach of an end of the depleted roll and the taken-up paper web is pressed against a glue-covered initial portion of a new roll synchronized in speed with the depleted roll, thereby forming a running paper web with a splice tail in a flying roll change,
- a device for shortening the splice tail which comprises:
- a guide roller forming a curved path with a center of curvature lying on a side of the paper web facing away from said splice tail so that said splice tail rises from said paper web by centrifugal force;
- and
- a knife arranged close to said path and a surface of said guide roller and having a blade directed against a traveling direction of the paper web for cutting off the splice tail raised from said paper web close to said curved path.
Dependencies are inferred from the claim text.