Patent ID: 7784730

Claim:
A device adapted to cover a danger area of a roll changer comprising: means on said roll changer to support at least one material roll for rotation and to drive said at least one material roll for rotation at a first rotational speed and at a second rotational speed less than said first rotational speed and greater than 0; a protective cover to selectively allow access to said roll support means in an open operational position and to prevent access to said roll support means in a closed operational position; a protective cover drive to move said protective cover between said closed, operational position and said open, operational position; and a control unit for said protective cover drive, wherein when said material roll has said first rotational speed, said control unit for said protective cover drive operates said protective cover drive to move said protective cover to said closed operational position and when said material roll has said second rotational speed, said control unit for said protective cover drive operates said protective cover drive to move said protective cover to said open operational position.