Coating apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorsToshihiro Mandai, Mikio Tomaru, Norio Shibata
Life of this patent
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Abstract
In coating with two slits of a coating slit and a recovering slit, by optimizing the slit clearance of the coating slit and the recovering slit, a coating layer with a very small and even thickness can be obtained. In a coating apparatus in which after a coating liquid is applied to a web to excess through the coating slit, a desired amount of coating liquid is applied to the web by scraping off an excess of coating liquid with a recovering slit, there is provided a slit clearance adjusting device for adjusting the slit clearance of the recovering slit.
Claims3
A coating apparatus in which in a state where a continuously running web is brought close to a lip surface at a tip of a coating head, a coating liquid sent into the coating head in excess of a desired amount is discharged through a coating slit and is applied to the web, and an excess of coating liquid applied to excess is scraped off with a recovering slit provided on a downstream side of the coating slit in a running direction of the web, wherein:
- there is provided a first slit clearance adjusting device which adjusts a slit clearance of the coating slit in the running direction of the web and a second slit clearance adjusting device which adjusts a slit clearance of the recovering slit in the running direction of the web.
A coating apparatus in which in a state where a continuously running web is brought close to a lip surface at a tip of a coating head, a coating liquid sent into the coating head in excess of a desired amount is discharged through a coating slit and is applied to the web, and an excess of coating liquid applied to excess is sucked up with a sucking-up device through a recovering slit provided on a downstream side of the coating slit in a running direction of the web, wherein:
- there is provided a first slit clearance adjusting device which adjusts a slit clearance of the coating slit in the running direction of the web and a second slit clearance adjusting device which adjusts a slit clearance of the recovering slit in the running direction of the web.
A coating apparatus in which in a state where a continuously running web is brought close to a lip surface at a tip of a coating head, a coating liquid sent into the coating head in excess of a desired amount is discharged through a coating slit and is applied to the web, and an excess of coating liquid applied to excess is scraped off with a recovering slit provided on a downstream side of the coating slit in a running direction of the web, wherein:
- a first slit clearance adjusting device adjusts a clearance of the coating slit by increasing or decreasing the force applied to one of the walls of the coating slit and a second slit clearance adjusting device adjusts a clearance of the recovering slit by increasing or decreasing the force applied to one of the walls of the recovering slit.
Dependencies are inferred from the claim text.