Coating apparatus – Control means responsive to a randomly occurring sensed... – Responsive to attribute – absence or presence of work
Patent
1989-03-23
1990-11-27
Hoag, Willard
Coating apparatus
Control means responsive to a randomly occurring sensed...
Responsive to attribute, absence or presence of work
118680, 118323, B05C 102
Patent
active
049727982
ABSTRACT:
A first distance measurement device for measuring a height of the surface of a substrate with respect to a reference plane of a drawing machine which drawing a pattern on the substrate by issuing paste-like material from a nozzle is mounted on a revolution member rotating about the nozzle, and the first distance measurement device is always positioned in the moving direction of the nozzle and measures a height of the surface of the substrate at a slightly preceding position from the nozzle, on the other band a second distance measurement device substantially measures a height of the nozzle from the reference plane, thus, a position of the nozzle is controlled on the basis of both the measured result, and an interval between the nozzle and the surface of the substrate is kept within a predetermined value.
REFERENCES:
patent: 4334495 (1982-06-01), Derkacs et al.
patent: 4451507 (1984-05-01), Beltz et al.
patent: 4643864 (1987-02-01), Martini
patent: 4749347 (1988-06-01), Valavaara
Ando Tateo
Kabeshita Akira
Hoag Willard
Matsushita Electric - Industrial Co., Ltd.
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