HIGH SPEED WEB MACHINE FOR LOCATING AND BONDING SWATCHES ONTO SHEETS

摘要

The invention relates to a method and an apparatus for applying adhesive and swatches to a traveling web. The apparatus comprises an adhesive-applying cylinder at an adhesive station for applying adhesive by rolling contact with the traveling web at predetermined and precise locations on the traveling web during each revolution of the adhesive-applying cylinder. A variable speed motor is connected to and drives the adhesive-applying cylinder to rotate this cylinder to a circumferential speed match velocity matched to the web's velocity at the time of rolling contact with the traveling web, during a speed match portion of its revolution; and to change to a substantially different sync recovery velocity during a sync recovery portion of its revolution to provide a velocity profile for each revolution of the adhesive-applying cylinder. Further, a swatch-applying cylinder is provided at a swatch station for applying swatches to the adhesive on the traveling web by rolling contact during each revolution of the swatch-applying cylinder and a variable speed motor is provided to drive the swatch-applying cylinder at the circumferential, speed match velocity during the speed match portion of the cylinder's revolution, and to change substantially different sync recovery velocities during a sync recovery portion of its revolution to provide a velocity profile for each revolution of the adhesive-applying cylinder. A controller is provided to operate the respective variable speed motors at their respective profiles.