Positive air pressure toner confining applicator

摘要

A method and apparatus for applying liquid toner to a recording medium using a toner applicator, wherein the applicator contains a channel for toner flow peripherally surrounded by an air channel. The recording medium carrying a latent electrostatic image is directed past the channel in the toner applicator. The channel in the applicator contains toner and is in fluid communication with the recording medium. Air under pressure is introduced into the air channel surrounding the toning channel thus providing a barrier around the toning channel, such that the toner is confined within the channel, thereby preventing unwanted leakage of liquid toner from the channel.