Patent ID: 6077352
Filing Date: 2000-06-20
Classification: B05C,D21H

Abstract:
A mounting assembly for mounting at a single coating station on a paper machine having a moving paper web with both a desired amount and an excess amount of coating thereon, the mounting assembly comprising a single web backing roll having a center of rotation and an outer roll surface supporting the moving paper web, a first coated web trailing angle doctor mounted to ride on the paper web on said backing roll and spaced away from said outer roll surface by at least said paper web for removing at least some of the excess coating from off of said paper web, said first coated web doctor not contacting said outer roll surface, means for mounting said first coated web doctor to move between a first position with said first coated web doctor essentially in contact with the coating on the paper web on said backing roll for removing at least some of the excess coating on said web from said web and a second position down and away from said backing roll with said first coated web doctor essentially out of contact with and spaced away from the paper web on said backing roll, said means for mounting said first coated web doctor being mounted on said paper machine and pivoting between its first and second positions, said means for mounting said first coated web doctor pivoting about a point below said center of rotation of said backing roll, a second coated web trailing angle doctor spaced away from and above said first coated web doctor and mounted to ride on the web on said backing roll and spaced away from said roll outer surface by at least said paper web, said second coated web doctor not contacting said outer roll surface for removing any remaining excess coating on said web from off of said paper web, and means for mounting said second coated web doctor to move between a first position with said second coated web doctor essentially in contact with the coating on the paper web on the backing roll for removing any remaining excess coating from said web and a second position up and away from said backing roll, with said second coated web doctor essentially out of contact with and spaced away from the web on said backing roll, said means for mounting said second coated web doctor being mounted on said paper machine and pivoting between its first and second positions, said means for mounting said second coated web doctor pivoting about a point above said center of rotation of said backing roll, said means for mounting said first coated web doctor and said means for mounting said second coated web doctor being movable independently with respect to each other, said first and second coated web doctor blades being spaced away from said outer roll surface by the web and not touching said outer roll surface when in said first positions, said first and second coated web doctors not touching said outer roll surface when in said second positions, said first and second coated web doctors being at trailing angles to the paper web of between 0 degrees to 55 degrees for permitting removal of coating, whereby said first coated web doctor and said second coated web doctor may be moved to said first positions for removing all of the excess coating from the paper web and leaving the desired amount of coating on the paper web and to said second positions for maintenance.