A self-cleaning ring conveyor includes a first roller having a first rotational axis and a second roller having a second rotational axis that is parallel with the first rotational axis. The conveyor also includes a first ring extending around a combination of the first roller and the second roller and a second ring extending around the combination of the first roller and the second roller. The first ring and the second ring are parallel to each other. The conveyor also includes a first scraper having a first scraping slot and a second scraping slot. The first ring extends through the first scraping slot and the second ring extends through the second scraping slot.

A method for forming a thin film having durability at a low cost is provided. A film formation apparatus 1 is used in the film formation method. The apparatus 1 comprises a vacuum container 11 in which a substrate 100 is placed at a lower part, a vacuum pump 15 for exhaust inside the container 11, a storage container 23 for storing a coating agent 21 provided outside the container 11, and a nozzle having an ejection part 19 capable of ejecting the coating agent 21 at its one end. A solution including two or more kinds of materials is used as the coating agent 21. The solution is ejected to the substrate in an atmosphere at a pressure set based on vapor pressures of respective materials composing the solution.

A method for forming a thin film having durability at a low cost is provided. A film formation apparatus 1 is used in the film formation method. The apparatus 1 comprises a vacuum container 11 in which a substrate 100 is placed at a lower part, a vacuum pump 15 for exhaust inside the container 11, a storage container 23 for storing a coating agent 21 provided outside the container 11, and a nozzle having an ejection part 19 capable of ejecting the coating agent 21 at its one end. A solution including two or more kinds of materials is used as the coating agent 21. The solution is ejected to the substrate in an atmosphere at a pressure set based on vapor pressures of respective materials composing the solution.

A system for recovering paint and cleaning in a painting machine having a conveying band for conveying panels to be painted includes a paint recovery unit for paint recovery having a reverse roller in contact with the conveying band, recovering paint sprayed on the conveying band, and a doctor blade scraping the reverse roller to recover paint for successive channelling to a tank; a cleaning unit having a cleaning roller, a drying blade, and an idle roller; a paint recovery unit provided as an independent unit; and a cleaning unit for the conveying band provided as an independent unit.

A system for recovering paint and cleaning in a painting machine having a conveying band for conveying panels to be painted includes a paint recovery unit for paint recovery having a reverse roller in contact with the conveying band, recovering paint sprayed on the conveying band, and a doctor blade scraping the reverse roller to recover paint for successive channelling to a tank; a cleaning unit having a cleaning roller, a drying blade, and an idle roller; a paint recovery unit provided as an independent unit; and a cleaning unit for the conveying band provided as an independent unit.

A paint recovery and cleaning trolley for an apparatus for applying paint provided with a belt for conveying pieces to be painted, including: a paint recovery subunit, in its turn including: a reverse roller in contact with the lower return section of said conveying belt, which recovers paint from the belt, a doctor blade tangentially placed with respect to said reverse roller for all its length, to allow the accumulation of a solvent and wetting said reverse roller; a doctor blade scraping the reverse roller so recovering paint; a doctor blade scraping the lower return section of said conveying belt, at least one nozzle for supplying a solvent compatible with the paint in use, a collecting hopper collecting said solvent, placed under said reverse roller, a paint collecting reservoir, a cleaning subunit, in its turn including: a reverse roller in contact with the lower return section of the conveying belt, a doctor blade tangentially placed with respect to said reverse roller for all its length to allow the accumulation of a solvent and wetting said reverse roller, a doctor blade scraping the lower return section of said conveying belt, at least a nozzle for supplying a solvent, a collecting hopper collecting said solvent, placed under said reverse roller of the cleaning subunit, a solvent collecting reservoir,
wherein in each subunit the respective components reverse roller, doctor blades and return section of the conveying belt form a closed chamber having the shape of a triangular prism, of which said components represent the rectangular faces, said chamber containing said solvent, which slowly drips from the triangular faces of said chamber into a respective collecting hopper.

A paint recovery and cleaning trolley for an apparatus for applying paint provided with a belt for conveying pieces to be painted, including: a paint recovery subunit, in its turn including: a reverse roller in contact with the lower return section of said conveying belt, which recovers paint from the belt, a doctor blade tangentially placed with respect to said reverse roller for all its length, to allow the accumulation of a solvent and wetting said reverse roller; a doctor blade scraping the reverse roller so recovering paint; a doctor blade scraping the lower return section of said conveying belt, at least one nozzle for supplying a solvent compatible with the paint in use, a collecting hopper collecting said solvent, placed under said reverse roller, a paint collecting reservoir, a cleaning subunit, in its turn including: a reverse roller in contact with the lower return section of the conveying belt, a doctor blade tangentially placed with respect to said reverse roller for all its length to allow the accumulation of a solvent and wetting said reverse roller, a doctor blade scraping the lower return section of said conveying belt, at least a nozzle for supplying a solvent, a collecting hopper collecting said solvent, placed under said reverse roller of the cleaning subunit, a solvent collecting reservoir,
wherein in each subunit the respective components reverse roller, doctor blades and return section of the conveying belt form a closed chamber having the shape of a triangular prism, of which said components represent the rectangular faces, said chamber containing said solvent, which slowly drips from the triangular faces of said chamber into a respective collecting hopper.

A self-cleaning ring conveyor includes a first roller having a first rotational axis and a second roller having a second rotational axis that is parallel with the first rotational axis. The conveyor also includes a first ring extending around a combination of the first roller and the second roller and a second ring extending around the combination of the first roller and the second roller. The first ring and the second ring are parallel to each other. The conveyor also includes a first scraper having a first scraping slot and a second scraping slot. The first ring extends through the first scraping slot and the second ring extends through the second scraping slot.

A self-cleaning ring conveyor includes a first roller having a first rotational axis and a second roller having a second rotational axis that is parallel with the first rotational axis. The conveyor also includes a first ring extending around a combination of the first roller and the second roller and a second ring extending around the combination of the first roller and the second roller. The first ring and the second ring are parallel to each other. The conveyor also includes a first scraper having a first scraping slot and a second scraping slot. The first ring extends through the first scraping slot and the second ring extends through the second scraping slot.

It is provided in a liquid application system for applying liquid to a material cake transported on a conveyor device having a liquid application device, that the conveyor device comprises a porous section on which the material cake lies or which the material cake contacts and which is permeable for a liquid to be applied, that the liquid application device comprises an application device via which the liquid to be applied can be applied to the side of the porous section of the conveyor device facing away from the material cake, and that the liquid application device comprises an overpressure chamber having a first overpressure relative to the environment by which the porous section of the conveyor device passes, wherein the applied liquid can be transported via the first overpressure through the porous section of the conveyor device or held via the first overpressure to the porous section.