Roll wrapping arrangement

Claim 1

An arrangement for wrapping big web rolls in a wrapper, which arrangement comprises a support system for supporting and rotating said roll and a stationary support frame surrounding said roll and being provided with means for leading said wrapper around said roll, said support frame being provided with a tension guide strap having a first portion in contact with the mantle surface of said roll and two parallel chains movable around the roll and interconnected over a portion with crossbars for applying said strap onto the mantle surface of said roll for keeping said wrapper on the mantle surface of said roll, at least some of said crossbars comprise a support means which supports a second portion of said guide strap at a distance from said roll against the tension of said strap urging it towards said roll, thereby causing said guide strap to bend off at a point between said first and said second portions from the mantle surface of said roll, said chains also having another portion free from crossbars following said crossbar portion of said chains, thereby allowing said guide strap to settle onto said roll from between said chains as said chains move around the roll, means to move said pair of parallel chains around said roll during the wrapping operation thereby to move said bending-off point of the guide strap around said roll and to cause an increasing portion of said guide strap to settle, due to its tension, onto the free mantle surface of said roll to bring the front end of said wrapper against the roll and to keep said wrapper closely thereon when rotating said roll during simultaneous feeding of the wrapper thereto and thereby wrap said roll.