Coating method and apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorKiyoshi Kamitani
Life of this patent
Estimating the term…
Abstract
Coating liquids are supplied to a coating hopper, and are extruded onto a slide surface of the coating hopper through slits. A pair of guide members are provided at both sides of the slide surface. Side faces of the guide members are positioned at both ends of a desired width of the coating liquids flowing of the slide surface to be applied on a traveling web. Consequently, the coating liquids that flow over the whole width of the slits are divided into the inside and the outside of the desired width by the guide members, and the divided coating liquids are extruded onto the slide surface. The coating liquids within the desired width flow down between the guide members and coat the web, whereas the coating liquids outside the desired width are collected through channels, which are formed in the guide members.
Claims8
A coating method comprising the steps of:
- supplying at least one coating liquid into a coating hopper;
- extruding the coating liquid onto a slide surface of the coating hopper through a substantially entire width of a slit of the coating hopper to cause the coating liquid to flow on the slide surface while regulating a width of the coating liquid flowing on the slide surface to a desired width with a pair of guide members arranged at both sides of the slide surface, at least one of the guide members being slidably adjustable;
- coating a traveling web with the coating liquid flowing inside the desired width regulated with the guide members;
- and
- collecting the coating liquid flowing outside the desired width.
A coating apparatus comprising:
- a coating hopper having a slide surface and at least one slit, at least one coating liquid being supplied into the coating hopper, then being extruded onto the slide surface through the slit, then flowing on the slide surface, and then being applied on a traveling web;
- and
- a pair of guide members for regulating a width of the coating liquid applied on the web to a desired width, the guide members being arranged at both sides of the slide surface;
- wherein at least one of the guide members comprises:
- a guide plate for dividing the slide surface into the inside and the outside of the desired width, the guide plate regulating a width of the coating liquid flowing on the slide surface to be applied on the web;
- a partition for dividing the slit into the inside and the outside of the desired width, the partition projecting from the bottom of the guide plate and being slidably inserted into the slit;
- and
- a channel for collecting the coating liquid extruded outside the desired width.
A coating apparatus comprising:
- a coating hopper having a slide surface and at least one slit, at least one coating liquid being supplied into the coating hopper, then being extruded onto the slide surface through the slit, then flowing on the slide surface, and then being applied on a traveling web;
- and
- a pair of guide members for regulating a width of the coating liquid applied on the web to a desired width, the guide members being arranged at both sides of the slide surface;
- wherein at least one of the guide members comprises:
- a slidably adjustable guide plate for dividing the slide surface into the inside and the outside of the desired width, the guide plate, after being slidably adjusted to set a width of the coating liquid flowing on the slide surface, regulating the width of the coating liquid flowing on the slide surface and to be applied on the web;
- and
- a suction collecting device for sucking and collecting the coating liquid flowing outside of the guide plate on the slide surface.
Dependencies are inferred from the claim text.