METHOD AND MEANS FOR APPLYING LIQUID TO A MOVING WEB

摘要

A method and apparatus for applying a controlled quantity of liquid to a moving web of liquid receptive material comprising a smoothly finished hydrophilic transfer roller in rotative pressure engagement with the web. Pressure between a smooth surfaced metering roller and the transfer roller is adjustable to accurately control the thickness of a film of fluid having low viscosity which is delivered by the transfer roller to the web. The relative surface speeds of the transfer roller and the web are adjustable to control the rate at which the metered film is delivered to the web and to control the hydraulic pressure exerted to the film to urge it into the web. A backup roller is employed to further control the hydraulic pressure of fluid transferred to the web. The metering roller and the transfer roller are skewed to regulate the moisture profile across the width of the web.