Film thickness controller

Details Film thickness controller Film thickness controller

1989-02-15

1991-02-19

MacDonald, Allen R.

Boots, shoes, and leggings

425141, B29C 5500

Patent

active

049949764

ABSTRACT:
There is disclosed a film thickness controller which contains a large dead time and in which, in order to solve a problem due to the dead time, past data is stored in a memory and a state variable is calculated on the basis of the stored data to control a system. The film thickness controller includes an adjusting mechanism including a plurality of die lips having interference effect. In order to solve a problem due to the interference effect, the film thickness controller combines a plurality of basic control systems to control the adjusting mechanism including the plurality of die lips.

REFERENCES:
patent: 3985845 (1976-10-01), Akatsuka et al.
patent: 4124342 (1978-11-01), Akatsuka et al.
patent: 4409160 (1983-10-01), Kogo et al.
patent: 4804556 (1989-02-01), Leffew et al.
patent: 4841208 (1989-06-01), Itoh et al.

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