Device for replacing a reel in an unwinder and related method
AssigneeFabio Perini S.p.A.
InventorsRoberto Morelli, Andrea Petrone
Life of this patent
Estimating the term…
Abstract
The unwinder includes an unwinding station, in which to arrange a reel to be unwound. In the unwinding station there is arranged a series of guide rollers, defining a feed path of the web material. There are also provided: a cutting member adapted to cut a web material coming from an exhausted reel; and splicing members to splice a trailing edge of a first web material coming from an exhausted reel to a leading edge of a second web material coming from a new reel. A pick-up device is configured to pick up the leading edge of the second web material from a temporary retaining element, carried by a transfer unit to transfer reels to the unwinding station.
Claims35
An unwinder for unwinding reels of web material to be fed to a converting line, comprising an unwinding station, in which to arrange a reel to be unwound, wherein the unwinding station comprises:
- a stationary structure;
- a series of guide rollers, defining a feed path of the web material;
- a cutting member adapted to cut web material coming from an exhausted reel;
- splicing members to splice a trailing edge of a first web material coming from the exhausted reel to a leading edge of a second web material coming from a new reel;
- a pick-up device associated with the stationary structure and adapted to pick up the leading edge of the second web material from a temporary retaining element, carried by a transfer unit adapted to transfer reels to the unwinding station;
- wherein the transfer unit comprises a bridge crane with a pair of hooks configured to engage said reels, the bridge crane being movable with respect to the stationary structure of the unwinding station.
An unwinder for unwinding reels of web material to be fed to a converting line, comprising an unwinding station, in which to arrange a reel to be unwound and in which are arranged:
- a series of guide rollers, defining a feed path of the web material;
- a cutting member adapted to cut web material coming from an exhausted reel;
- splicing members to splice a trailing edge of a first web material coming from the exhausted reel to a leading edge of a second web material coming from a new reel;
- a pick-up device adapted to pick up the leading edge of the second web material from a temporary retaining element, carried by a transfer unit adapted to transfer reels to the unwinding station;
- wherein the temporary retaining element comprises a pair of arms extending from the transfer unit;
- and
- wherein the temporary retaining element comprises a cross member extending approximately parallel to the axis of the reel engaged by the transfer unit and fixed to the pair of arms, said cross member having pick-up and temporary retaining members for the leading edge of a web material wound on a reel carried by said transfer unit.
An unwinder for unwinding reels of web material to be fed to a converting line, comprising an unwinding station, in which to arrange a reel to be unwound and in which are arranged:
- a series of guide rollers, defining a feed path of the web material;
- a cutting member adapted to cut web material coming from an exhausted reel;
- splicing members to splice a trailing edge of a first web material coming from the exhausted reel to a leading edge of a second web material coming from a new reel;
- a pick-up device adapted to pick up the leading edge of the second web material from a temporary retaining element, carried by a transfer unit adapted to transfer reels to the unwinding station;
- wherein the pick-up device comprises an arched arm hinged to the stationary structure of the unwinder and shaped so as to engage the leading edge of a web material of a reel carried by the transfer unit, said leading edge being temporarily retained by the temporary retaining element, and shaped to pass around the temporary retaining element.
Dependencies are inferred from the claim text.