Patent ID: 9375733
Filing Date: 2016-06-28
CPC Classification: B05B,B05D,G02F

Claim Text:
1. A method for coating an alignment film, comprising the following steps: (1) providing a substrate to which an alignment film is to be coated and placing the substrate to which an alignment film is to be coated on a working table that is reciprocally movable frontward and rearward and leftward and rightward; (2) providing a pressurization tank and depositing a predetermined amount of an alignment liquid in the pressurization tank; (3) providing a supply tank and using a liquid pump to convey the alignment liquid contained in the pressurization tank to the supply tank; (4) using a supply conduit to connect the supply tank to an alignment liquid jet nozzle and subjecting the supply conduit to heating to reduce viscosity of the alignment liquid so as to allow the alignment liquid to smoothly move from the supply tank into the alignment liquid jet nozzle, wherein subjecting the supply conduit to heating is conducted in such a way that the supply conduit is heated to a predetermined temperature range and then heating is stopped to prevent evaporation of the alignment liquid in the supply conduit and wherein the supply conduit is provided with a layer of temperature-keeping material on an outside surface thereof to keep the supply conduit in the predetermined temperature range; and (5) operating the alignment liquid jet nozzle to apply the viscosity reduced alignment liquid to the substrate to which an alignment film is to be coated and reciprocally moving the working table during the process of application so as to have the alignment liquid uniformly coated on the substrate and complete the coating of the alignment film.