Open loop heating controller and method for corrugators

Details Open loop heating controller and method for corrugators Open loop heating controller and method for corrugators

1975-08-29

1977-11-01

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156205, 156361, 156367, 156470, B32B 3100

Patent

active

040564177

ABSTRACT:
An open-loop method and apparatus for controlling the heating of webs utilized in a corrugating machine for the production of double-face corrugated paperboard as a function of at least one production factor of the corrugator machine. A rotatably journaled heating roll receives a web in contact with a circumferential area of the roll and the circumferential area of contact between the web and the roll is varied by a control circuit. The control circuit varies the contact area by positioning a positionable means relative to the heating roll in response to at least one production factor of the corrugating machine. The control circuit senses the at least one production factor of the machine and generates a signal related to the sensed production factor. The generated production factor related signal is periodically sampled and is stored at a first time. The stored production factor related signal is compared with the production factor related signal sampled at a time subsequent to the first time and a drive signal related in value to a difference between the compared signals is generated and applied to drive means for driving the positionable means.

REFERENCES:
patent: 2941573 (1960-06-01), Cassady
patent: 3004880 (1961-10-01), Lord
patent: 3411388 (1968-11-01), Rappaport
patent: 3516617 (1970-06-01), Haner et al.
patent: 3966518 (1976-06-01), Ferara et al.
patent: 3977929 (1976-08-01), Evans
patent: 3981758 (1976-09-01), Thayer

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