Unwinding apparatus for a paper or board web

An apparatus for unwinding a paper web wound as a parent roll on a roll axle for subsequent handling by a succeeding rewind station, said apparatus comprising:

• an unwinding unit including guideway means for receiving the ends of the roll axle of the parent roll, the parent roll being movable between a waiting position and an unwinding position on said guideway means;
• splicing means for splicing the web-end of an unwound web to the web-beginning of a parent roll located in the unwinding position, said splicing means including a cross member substantially parallel to the roll axle of the parent roll, the cross member being movable against the unwound web substantially perpendicularly to the direction of web travel from a position in which the cross member is out of contact with the web to a position in which the cross member is partially wrapped by the web-end of the unwound web, the cross member wrapped by the web-end being movable against the parent roll, the parent roll being provided at the periphery thereof with adhesive on the web-beginning, the parent roll during splicing being fixed in the unwinding position with the adhesive in the path of motion of the web-end wrapped on the cross member;
• separating means for separating the web expiring from the parent roll substantially perpendicularly to the direction of web travel, said separating means being movable between a working position in which the web, when stationary, is clamped to the cross member of said splicing means by said separating means and a neutral position out of contact with the web to which said separating means is returned after separation of the web;
• lifting means for lifting out of the unwinding position the roll axle of an expired parent roll whose expiring web has been separated by said separating means;
• and
• a dancer roller arranged after said splicing means in the direction of web travel, said dancer roller dipping into the unwound web expiring from the parent roll and emerging therefrom during splicing of the web.