Web winding machine

An apparatus for winding a web of sheet material into a roll on a core comprising:

• a frame, a pair of rollers rotatably mounted on the frame and having a space therebetween, a vacuum chamber within the frame communicating with the space between the rollers, means for reducing the air pressure in the vacuum chamber whereby a core for a roll can be held in the space between the rollers by air pressure and the web can be wound on the core by rotating the core with the rollers, and a turret rotatably mounted on the frame, said pair of rollers being rotatably mounted on the turret, the turret being rotatable to move the pair of rollers from a core feeding station to a discharge station, said turret including a shaft rotatably mounted on the frame, the vacuum chamber including a pair of chamber walls which are supported from the turret shaft and extend upwardly to adjacent the surfaces of the rollers.

An apparatus for winding a web of sheet material into a roll on a core comprising:

• a frame, a pair of rollers rotatably mounted on the frame and having a space therebetween, a vacuum chamber within the frame communicating with the space between the rollers, means for reducing the air pressure in the vacuum chamber whereby a core for a roll can be held in the space between the rollers by air pressure and the web can be wound on the core by rotating the core with the rollers, and a turret shaft rotatably mounted on the frame, said pair of rollers being mounted on the turret shaft for rotation about axes which extend parallel to the turret shaft, one of the rollers being mounted on the turret shaft for pivotal movement toward and away from the other roller whereby the space between the rollers can be increased as the web is wound on the core, the turret shaft being rotatable to move the pair of rollers from a core-feeding station to a discharge station, the vacuum chamber being provided by a first chamber wall which is supported from the turret shaft and which terminates in an arcuate end portion which is adjacent said one roller as said one roller pivots toward and away from the other roller and a second chamber wall which is supported from the turret shaft and which extends to adjacent the other roller.

An apparatus for winding a web of sheet material into a roll on a core comprising:

• a frame, a turret rotatably mounted on the frame, a plurality of pairs of rollers mounted on the turret for rotation about axes which extend parallel to the axis of rotation of the turret, each pair of rollers having a space between the rollers, a vacuum chamber in the turret for each pair of rollers, each vacuum chamber communicating with the space between a pair of rollers, and means for reducing the air pressure in the vacuum chambers whereby a core for a roll can be held in the space between a pair of rollers by air pressure and the web can be wound on the core by rotating the core with the rollers, said turret including:
• a shaft rotatably mounted on the frame, each vacuum chamber being provided by a first chamber wall which is supported from the turret shaft and which extends to adjacent the surface of one of the rollers of a pair and a second chamber wall which is supported from the turret shaft and which extends to adjacent the other roller of the pair.

An apparatus for winding a web of sheed material into a roll on a core comprising:

• a frame, a turret rotatably mounted on the frame, a plurality of pairs of rollers mounted on the turret for rotation about axes which extend parallel to the axis of rotation of the turret, each pair of rollers having a space between the rollers, a vacuum chamber in the turret for each pair of rollers, each vacuum chamber communicating with the space between a pair of rollers, means for reducing the air pressure in the vacuum chambers whereby a core for a roll can be held in the space between a pair of rollers by air pressure and the web can be wound on the core by rotating the core with the rollers and a bedroll rotatably mounted on the frame for advancing the web toward the rollers, said bedroll having web cutoff means operably associated therewith whereby leading edge of a severed web is provided on said bedroll for transfer to said core.

A method of winding a core with a web of sheet material comprising the steps of providing a free edge of a web on a bedroll, advancing said free edge on said bedroll toward a turret equipped with a pair of spaced rollers, reducing the air pressure in said space between said pair of rollers, inserting a core in said space and holding the core against the rollers by air pressure, rotating the rollers to rotate the core, and attaching said free edge to the core and winding the web on the rotating core.