Patent ID: 9375969
Filing Date: 2016-06-28
CPC Classification: B42C

Claim Text:
1. An apparatus to exchange an application roller which is aligned with a duct roller having an axis of rotation and which is used to apply glue to a spine of a book block by rolling off the book block spine, the book block being transported in a conveying direction and the duct roller removing glue from a glue container to transfer the glue to the application roller, the apparatus comprising: at least two application rollers axially spaced apart, relative to each other, wherein a first one of the at least two application rollers is arranged to be in an initial position aligned and in contact with the duct roller, the at least two application rollers each having an axis of rotation separate from the axis of rotation of the duct roller, and the axis of rotation respectively of the duct roller and each of the at least two application rollers is substantially normal to the conveying direction; and a device to exchange the first one of the application rollers with a second one of the application rollers, wherein the device is configured to move the first one of the application rollers away from the duct roller, to subsequently axially move the at least two application rollers to exchange the first application roller with the second one of the application rollers so that the second one of the application rollers is aligned with the duct roller in place of the first one of the application rollers, and thereafter to move the second one of the application rollers against the duct roller.