Fluid treatment device

A device for applying fluid to a substrate, said device comprising:

• a head member including first and second portions adapted for being fixedly positioned relative to each other and defining an opening therebetween adapted for having a substrate positioned therein, at least said first portion of said head member including a first channel therein located at a first, established distance from said substrate when said substrate is positioned within said opening and adapted for having a quantity of fluid therein for engaging a first surface of said substrate as said quantity moves at a first velocity, said first portion further including a weir therein located at a second, established distance from said substrate less than said first distance when said substrate is positioned within said opening and adapted for having a volume of fluid pass thereover and engage said first surface of said substrate as said volume moves at a second velocity greater than said first velocity;
• fluid inlet means operatively connected to said first channel and said weir for supplying said quantity of fluid to said first channel and said volume of fluid to said weir at a predetermined pressure sufficient to cause said quantity and said volume to move at said first and second velocities, respectively;
• and
• fluid blocking means located adjacent said first channel and said weir for substantially blocking said quantity of fluid and said volume of fluid and thereby maintain said fluids at established levels within said first portion such that said fluids will engage said first surface of said substrate when moving at said first and second velocities.