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AssigneeStork Contiweb B.V.
InventorsTheodoor Antonius Buchmeyer, Hubertus Johannes Schoonderbeek
Estimating the term…
A method and apparatus for preparing the start of a material web of a stock roll (5) in a roll exchanger comprises the steps of bringing a surplus roll (20) removed from a stock-roll holder (3), which surplus roll (20) is incorporated in a frame of web-takeup (11) and to which surplus roll (20) an adhesive is applied, into contact with the material web of the stock roll (5), taking up the material web from the stock roll (5) on the surplus roll (20), winding up a length of the material web from the stock roll (5) on the surplus roll (20), winding up a length of the material web of the stock roll (5) on the surplus roll (20) and severing the material web between the portion of the material web wound on the surplus roll (20) ant the stock roll (5). The roll exchanger is provided with means including, in particular, a web-takeup device (11), in which a surplus roll (20) is or can be mounted so that it can rotate, with which the method can be carried out.
Method for preparing the start of a material web of a stock roll (5) in a roll exchanger, which method comprises the steps of:
Method according to one of the preceding claims, characterized in that the surplus roll (20) is removed from the stock-roll holder (3) after the stock-roll holder (3) has been moved to a preparation position in the roll exchanger, and then a new stock roll (5) for preparation is placed in the stock-roll holder (3) and, after the steps a)-c) have been carried out, is moved to an unwinding position in the roll exchanger.
Roll exchanger comprising a frame (1) in which at least one stock-roll holder (3, 4) with drive unit (8) is mounted, together with web-takeup means (11) for taking up the start of a material web from the stock roll (5) and unwinding a portion thereof, which web-takeup means (11) comprise a frame in which an interchangeable cylindrical winding-up body has been mounted rotatably about a horizontal shaft, and drive means for rotating the winding-up body a web splicing unit (9,10) means for splicing the winding-up body of the web-takeup means to the material web and movement means for moving the stock roll and the web-takeup means (11) with respect each other, wherein the roll exchanger includes means for using a surplus roll (20) of stock roll at the winding-up body to be incorporated in the frame of the web-takeup means (11), and further including means for removing the surplus roll from the stock-roll holder (3) during operation after rolls have been exchanged in they roll exchanger by the web-takeup means(11).
Dependencies are inferred from the claim text.