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US 3,989,937 AGranted
Interactive roll gap-reverse roll speed control of the applicator of a material treater
AssigneeFormica Corporation
InventorsCharles Robert Fay, James Douglas Richter
Life of this patent
Estimating the term…
Abstract
An improved process and apparatus are disclosed wherein the resin solution treatment of a web on a material treater is conducted by interactively adjusting the roll gaps of a reverse roll applicator in conjunction with applicator roll speed changes.
Claims10
A method of controlling the application of a resinous solution to a fibrous host material with a reverse roll applicator which comprises
- 1. providing a signal (A) representative of the required line speed set point of said applicator,
- 2. providing a signal (B) representative of the desired roll speed set point of said applicator,
- 3. calculating the ratio of said desired roll speed set point to said required line speed set point from said signal (A) and said signal (B) and providing a signal (C) representative of said ratio,
- 4. providing a signal (D) representative of the desired set point of said ratio,
- 5. calculating the deviation of said signal (C) from said signal (D) and providing a signal (E) representative of said deviation,
- 6. calculating the required change in the desired roll speed set point of said applicator from said signals (A), (B) and (E) and providing a signal (F) representative of said required change,
- 7. modifying said signal (B) in response to said signal (F) and providing a signal (G) representative of the actual roll speed set point,
- 8. controlling the actual roll speed in accordance with said signal (G),
- 9. calculating the change required in the actual gap setting of said applicator to maintain the desired amount of resin application onto said host material from said signal (F) and providing a signal (H) representative of said gap setting change required,
- 10. providing a signal (I) representative of the actual gap settings of said applicator roll,
- 11. modifying said signal (I) in accordance with said signal (H) and providing a signal (J) representative of the new gap set point, and
- 12. controlling said applicator roll gap settings in accordance with said signal (J).
9 more elements
In a fibrous host material treating process wherein said material is treated with a resinous solution in a reverse roll applicator and dried in a dryer, apparatus for controlling the application of said solution comprising
- 1. means for providing a signal (A) representative of the required line speed set point of said applicator,
- 2. means for providing a signal (B) representative of the desired roll speed set point of said applicator,
- 3. means responsive to said signal (A) and signal (B) for calculating the ratio of said desired roll speed set point to said required line speed set point and providing a signal (C) representative of said ratio,
- 4. means for providing a signal (D) representative of the desired set point of said ratio,
- 5. means responsive to said signal (C) and signal (D) for calculating the deviation of said signal (C) from said signal (D) and providing a signal (E) representative of said deviation,
- 6. means responsive to said signals (A), (B) and (E) for calculating the required change in the desired roll speed set point of said applicator and providing a signal (F) representative of said required change,
- 7. means responsive to said signal (F) for modifying said signal (B) and providing a signal (G) representative of the actual roll speed set point,
- 8. means responsive to said signal (G) for controlling the actual roll speed,
- 9. means responsive to said signal (F) for calculating the change required in the actual gap setting of said applicator to maintain the desired amount of resin application onto said host material and providing a signal (H) representative of said gap setting change required.
- 10. means for providing a signal (I) representative of the actual gap settings of said applicator roll,
- 11. means responsive to said signal (H) for modifying said signal (I) and providing a signal (J) representative of the new gap set point and
- 12. means responsive to said signal (J) for controlling said applicator roll gap settings.
9 more elements
Dependencies are inferred from the claim text.