Arrangement in connection with curtain coating of a fibrous web

An arrangement for use in connection with curtain coating, having a movable nozzle beam forming a coating material curtain, the beam mounted for movement from a first position not over a moving supported fibrous web to a second position over the moving supported fibrous web, for coating a fibrous web, comprising:

• a return reservoir forming an upwardly opening reservoir, and a collecting surface connected thereto which drains into the upwardly opening reservoir so as to receive coating material and cleaning fluid from above, the collecting surface extending in a first direction over the web toward the coating material curtain when the nozzle beam is positioned for coating the fibrous web in the second position, the collecting surface arranged to collect the coating material as the beam is moved from the first position to the second position;
• a source of cleaning fluid positioned above the return reservoir;
• a cover plate movably mounted to swing around a pivoted shaft connected to the cover plate, the pivoted shaft extending in a cross-direction with respect to a direction in which the fibrous web travels;
• wherein the cover plate is mounted for movement between at least two positions, a front position where the cover plate extends beyond the collecting surface in the first direction and a cleaning position where the cover plate extends above the return reservoir such that cleaning liquid applied to the cover plate from the source of cleaning fluid will be conveyed to the return reservoir;
• and
• wherein the cover plate is mounted for movement between the cleaning position and the front position.

An arrangement for use in connection with curtain coating, having a movable nozzle beam forming a coating material curtain, the beam mounted for movement from a first position not over a moving supported fibrous web to a second position over the moving supported fibrous web, for coating a fibrous web, comprising:

• a return reservoir forming an upwardly opening reservoir, and a collecting surface connected thereto which drains into the upwardly opening reservoir so as to receive coating material and cleaning fluid from above, the collecting surface extending in a first direction over the web toward the coating material curtain when the nozzle beam is positioned for coating the fibrous web in the second position, the collecting surface arranged to collect the coating material as the beam is moved from the first position to the second position;
• a source of cleaning fluid positioned above the return reservoir;
• a cover plate movably mounted to swing around a pivot shaft connected to the cover plate, the pivot shaft extending in a cross-direction with respect to a direction in which the fibrous web travels;
• wherein the cover plate and the pivot shaft are mounted for linear movement to move in a second direction opposite the first direction;
• wherein the cover plate is movable in the second direction between a front position where the cover plate extends over and beyond the collecting surface in the first direction, and a back position where the cover plate does not extend beyond the collecting surface in the first direction, and in the back position the cover plate is swingable around the pivot shaft to a cleaning position in which the cover plate extends above the return reservoir such that cleaning liquids applied to the cover plate from the source of cleaning fluid will be conveyed to the return reservoir;
• and
• wherein the cover plate is mounted for movement between the cleaning position and the front position.