Selectively convertible apparatus for treating a moving web

Apparatus selectively convertible to perform one or more coating operations on a web of paper or the like comprising,

• a first rotatable support roller,
• a coating blade movable between a first fixed position in web coating relation to the surface of said support roller and a second fixed position away from said roller,
• controllable means for setting said coating blade selectively at either of said first and second fixed positions,
• means adapted to cooperate with said blade in said first fixed position and with said support roller to form a dam for coating material to be applied to a web passing through the nip between said coating blade and said support roller,
• a second rotatable support roller disposed with its axis of rotation parallel to said first support roller and mounted for movement from an active position in which it forms a nip with said first roller to an inactive position away from said first roller,
• controllable means for setting said second support roller selectively at either of said active or inactive positions,
• means adapted to cooperate with said rollers in said active position to form a dam for coating material, and
• drive means for said first and second support rollers.