Apparatus and method for applying sprayed fluid to a moving web
AssigneeWatt Fluid Applications, LLC
InventorKenneth R. Watt
Life of this patent
Estimating the term…
Abstract
Apparatus and method for spray coating of a horizontally moving web uses a spray-down unit that sprays downwardly onto the web and a spray-up unit that sprays upwardly onto the web. Each unit has adjustable cut-offs that control the length of the spray pattern by intercepting end portions of the spray pattern. The cut-offs of each unit can be adjusted to block a spray emission opening so as to prevent the entrance of contaminants when the unit is not in operation. Fluid intercepted by the cut-offs is returned for re-use. Both units are supported on a frame, and the spray-down unit can be moved away from the spray-up unit.
Claims35
Apparatus for spraying fluid onto an object, such as a moving web, comprising a pair of spray generating units, one of which is a spray-down unit positioned to spray downwardly onto the object and the other of which is a spray-up unit positioned to spray upwardly onto the object, each of said units having a pair of spray cut-offs that are adjustable toward and away from one another to intercept opposite end portions of a spray pattern of that unit.
Apparatus for spraying fluid onto an object, such as a moving web, comprising a pair of spray generating units, one of which is a spray-down unit positioned to spray downwardly onto the object and the other of which is a spray-up unit positioned to spray upwardly onto the object, each of said units having a pair of spray cut-offs that are adjustable to intercept end portions of a spray pattern of that unit, wherein each of the spray generating units comprises counter-rotating fluid pick-up and brush rolls disposed to transfer fluid from the pick-up roll to the brush roll.
A method of spraying fluid onto an object, such as a moving web, comprising:
- spraying fluid downwardly onto the object;
- spraying fluid upwardly onto the object;
- intercepting end portions of spray patterns produced by the downward and upward sprays to limit the length of each spray pattern;
- and
- further comprising adjusting the length of the intercepted end portions of each spray pattern and thereby adjusting the length of the spray pattern applied to the object.
A method of spraying fluid onto an object, such as a moving web, comprising:
- providing a pair of spray generating units, one of which is a spray-down unit positioned to spray downwardly onto the object and the other of which is a spray-up unit positioned to spray upwardly onto the object;
- and
- providing each unit with a pair of spray cut-offs that are adjustable toward and away from one another to intercept opposite end portions of a spray pattern.
Apparatus for spraying fluid onto a moving web, comprising a pair of spray generating units, one of which is a spray-down unit positioned to spray downwardly onto the moving web and the other of which is a spray-up unit positioned to spray upwardly onto the moving web, each of the units having a spray pattern that extends transversely of the moving web, and each of the units having a pair of spray cut-offs that are disposed to intercept opposite end portions of the spray pattern of that unit adjacent to longitudinal edge portions of the moving web.
A method of spraying fluid onto a moving web, comprising:
- spraying fluid downwardly onto the moving web in a spray pattern that extends transversely of the moving web;
- spraying fluid upwardly onto the moving web in a spray pattern that extends transversely of the moving web;
- and
- inserting spray cut-offs into the spray patterns at positions adjacent to longitudinal edge portions of the moving web so as to intercept end portions of the spray patterns and thereby to limit the length of the spray patterns transversely of the moving web.
Dependencies are inferred from the claim text.