Coater gap control arrangement

Details Coater gap control arrangement Coater gap control arrangement

1989-07-19

1990-06-05

Hoag, Willard

Coating apparatus

Control means responsive to a randomly occurring sensed...

118708, 118419, B05C 104

Patent

active

049304402

ABSTRACT:
A coater gap control arrangement for controlling the thickness of a film of coating to be formed on a workpiece is provided in a coater, which is equipped with a base, a back-up roll rotatably mounted on one end portion of the base for transporting the workpiece, a coater body slidably mounted on the base and a coater head securely mounted on the coater body for supplying the coating material onto the surface of the workpiece. The coater gap control arrangement is comprised of a position control motor securely mounted on the base for moving the coater body back and forth with respect to the back-up roll to control the position of the coater body, a non-contact type distance meter securely mounted on the coater body for measuring the distance up to the surface of the workpiece, and a processor for controlling the position control motor on the basis of a signal from the distance meter so that a predetermined distance may be kept at all times between the coater head and the workpiece. The coater head and the distance meter confront the back-up roll and are located on opposite sides of a straight line which passes a center of rotation of the back-up roll and along which the coater body can move. Both the coater head and the distance meter form the same angle with respect to this straight line.

REFERENCES:
patent: 2558773 (1951-07-01), Mulloy et al.
patent: 3330961 (1967-07-01), Juengst et al.
patent: 3900003 (1975-08-01), Sato et al.
patent: 3995478 (1976-12-01), Wilhelm
patent: 4704296 (1987-11-01), Leanna et al.

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