Coating apparatus.

摘要

A coating apparatus wherein the coating is made by a coater 1' while a support 2 is carried in a non-contacting manner by a gas jetted from a gas jetting device 3' towards the support 2. The gas jetting device 3' has a hollow housing into which the gas is introduced from a gas source, the wall of the housing adjacent to the support 2 being provided with a plurality of gas jetting nozzle ports 10 through which the gas is jetted towards the support 2, each gas jetting nozzle port 10 having a throat portion 10a presenting a minimum cross-sectional area inwardly spaced from the outer surface 9 of the wall of the housing and an enlarged outlet portion 10b presenting a comparatively large diameter and opening in surface 9 of the wall.

The ratio of port area is adjusted in such a manner that the rate of jetting of the gas from unit area of the outer surface 9 of the gas jetting device 3' becomes smaller as the width of the support 2 is increased.