| 摘要 |
Process for covering a surface (1a) of a substrate (1) with a layer (2) of a fluid material, characterized in that: (a) with a confining wall (3) closed up on itself, arranged some distance from and above the surface to be covered (1a), and whose lower edge (3a) forms together with the latter a peripheral void (4), is defined a treatment chamber (5) delimiting an area (6) to be treated on the said surface to be covered; (b) a controlled vacuum is established inside the treatment chamber (5) by admitting an incoming gas stream (7) via the peripheral void (4), and by extracting an outgoing gas stream (8) from the treatment chamber, so as to obtain an internal pressure in the said chamber which is lower than the external pressure; (c) a controlled fluid stream (10) is introduced into the treatment chamber (5) under vacuum, this stream comprising the fluid covering material, which forms at the level of the peripheral void, together with the incoming gas stream (7), a turbulent mixed flow, which is aspirated into contact with the developed surface (1b) in the area (6) to be treated, depositing the fluid material thereat, and which is then discharged with the outgoing gas stream (8). |
