| 摘要 |
A toothpaste dispenser with a timer device so that a person will receive a signal to indicate the time period during which the teeth are being brushed; three embodiments are shown, in one embodiment an hourglass timer is provided and in a second and third embodiment an electrical signal device is provided the timing being selected of a time period of between two and three minutes, the optimal period during which brushing should continuously be done in a tooth cleaning operation in order to achieve maximum results.
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