Extrusion-type coating method and apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorsToshihiro Mandai, Norio Shibata
Life of this patent
Estimating the term…
Abstract
Edge faces with level differences are formed by assembling blocks constructing a coating head, and level difference variances in the width direction of a web are measured by a level difference variance measurement device. Then, the level difference variances are adjusted with reference to measured results, so that the level difference variances can be reduced. Therefore, coating layers can be uniformly formed on the web.
Claims14
An extrusion coating method wherein a continuously-running web is relatively pressed against edge faces of a coating head, a coating liquid supplied into the coating head is supplied to a discharge mouth formed on the edge faces in a direction of a width of the web through a supply route and is discharged from the discharge mouth so as to apply the coating liquid on the web, and the coating head is divided into two blocks along the supply route so that a level difference between the edge faces can be set, the extrusion coating method comprising the steps of:
- preliminarily setting the level difference by assembling the blocks on a base with a reference plane so that the level difference between the edge faces is a desired level difference;
- then measuring a variance of the level difference preliminarily set in the width direction of the web using a level difference variance measuring device;
- then finally setting the level difference according to results of the measurement using a level difference correction device;
- and
- then applying the coating liquid on the web by using the coating head into which the set blocks are assembled.
An extrusion coating method wherein a continuously-running web is relatively pressed against edge faces of a coating head, coating liquids supplied into the coating head are supplied to discharge mouths formed on the edge faces in a direction of a width of the web through supply routes and are discharged from the discharge mouths so as to apply the coating liquids on the web, and the coating head is divided into blocks along the supply routes so that level differences between the edge faces can be set, the extrusion coating method comprising the steps of:
- preliminarily setting the level differences by assembling the blocks on a base with a reference plane so that the level differences between the edge faces are desired level differences;
- then measuring variances of the level differences preliminarily set in the width direction of the web using a level difference variance measuring device;
- then finally setting the level differences according to results of the measurement using a level difference correction measuring device;
- and
- then applying the coating liquid on the web by using the coating head into which the set blocks are assembled.
An extrusion coating apparatus wherein a continuously-running web is relatively pressed against edge faces of an extrusion coating head, a coating liquid supplied into the extrusion coating head is supplied to a discharge mouth formed on the edge faces in a direction of a width of the web through a supply route and is discharged from the discharge mouth so as to apply the coating liquid on the web, and the extrusion coating head is divided into two blocks along the supply route so that a level difference between the edge faces can be set, the extrusion coating apparatus comprising:
- said extrusion coating head for extruding the coating liquid onto the web;
- a level difference variance measurement device which measures a variance of the level difference in the width direction of the web;
- and
- a level difference correction device which corrects the level difference according to results of the measurement by the level difference variance measurement device so that the variance of the level difference is reduced.
An extrusion coating apparatus wherein a continuously-running web is relatively pressed against edge faces of an extrusion coating head, coating liquids supplied into the extrusion coating head are supplied to discharge mouths formed on the edge faces in a direction of a width of the web through supply routes and are discharged from the discharge mouths so as to apply the coating liquids on the web, and the extrusion coating head is divided into blocks along the supply routes so that level differences between the edge faces can be set, the extrusion coating apparatus comprising:
- said extrusion coating head for extruding coating liquids onto the web;
- a level difference variance measurement device which measures variances of the level differences in the width direction of the web;
- and
- a level difference correction device which corrects the level differences according to results of the measurement by the level difference variance measurement device so that the variances of the level difference are reduced.
Dependencies are inferred from the claim text.