| 摘要 |
A flow of coating material from a source to a doctor blade coating nip (20) with a continuously travelling web is subjected to successive pressure drops so that coating material reaches the coating nip uniformly throughout the extent of the doctor blade. One of the pressure drops is through a multi-port pressure drop device (53,57) and another pressure drop is through a slit orifice pressure drop device (59,60,61). An arrangement for replacement clamping of the doctor blade (21) is also provided. A doctor blade thruster (73,74) is adjustable up and down along the blade relative to the upper coating nip edge of the blade.
|
