| 摘要 |
Metered dose applicators that irradiate a portion of light sensitive product. When a dropper applicator is secured to a reservoir, a usable volume inside the dropper is reduced. As the dropper is removed from the reservoir, the usable volume in the dropper increases, creating a suction within the dropper that draws product into the dropper from the reservoir. When the dropper is off the reservoir, then a button that is accessible to a user is used to increase and decrease the size of the usable volume. The button also turns on a light that is effective to activate the product as it is being dispensed from the dropper.
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