| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for indicating whether or not a dispensable product is necessary to be refilled prior to the next scheduled service interval. <P>SOLUTION: The method includes a step of tracking a used amount over a first interval, a step of calculating a frequency based on the used amount over the first interval, and a step of comparing a remaining amount with a required amount which is equal to a product of the number of weeks in the service interval and a calculated frequency. In the case that the remaining amount is determined to be smaller than the required amount based on the used amount, a warning is issued to indicate that the dispensable product should be replaced, otherwise it may be empty before the next service interval. A dispenser incorporating the method is also described. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
