Surface rotation speed detection in spray systems
AssigneeNordson Corporation
InventorsJames Khoury, Drew Roberts, Lenzie Borders, Charles Nagy, Timothy Wilson
Life of this patent
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Abstract
A spray application system for applying material to a surface of a rotating body such as a beverage can includes a detector that detects the actual speed of rotation of the surface during a spraying operation. This allows a controller to adjust trigger signals for the application device to be adjusted based on speed of rotation to minimize overcoat. A laser sensor may be used as an example. The use of the speed detector also allows for partial wraps as well as full wraps of applying material to the rotating surface.
Claims10
Apparatus for spraying coating material onto an interior surface of a rotating can body, comprising:
- a spray applicator for spraying coating material onto the can interior surface as the can body rotates;
- a sensor that optically detects actual rotation speed of the can body by optically sensing a characteristic of a rotating surface of the can body;
- a control circuit that determines the number of rotations of the can body during a time period based on said detected actual speed of rotation of the can body;
- and said control circuit controlling said spray applicator to spray coating material onto the can interior surface during a predetermined time period that corresponds to number of rotations of the can body.
Dependencies are inferred from the claim text.