ROLL COATING APPARATUS HAVING A TENSION CONTROL DEVICE

摘要

The present invention relates to a technique for properly controlling the tension of a film by using a tension control device when a support roll installed for producing an optical sheet with different size from an existing sheet in a roll coating device is replaced by a different support roll. For this, the present invention, in a roll coating apparatus of a master sheet method or rotating roll method, includes a tension apparatus. When a support is replaced by a support roll with different diameter, a gap between a first pressure roll and a second pressure can be controlled by moving the first pressure roll and the second pressure roll forwards or backwards. Thereby, the tension of the film can be controlled.