Paper dispenser with proximity detector
US7161359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2004 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Sep 9, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K2010/3668
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A paper dispenser having a proximity detector for dispensation of paper therefrom. The dispenser includes a housing having an inner chamber adapted to support a roll of paper. The housing also has a dispensing aperture. A motor is adapted to dispense paper from the roll through the dispensing aperture. The dispenser also includes a proximity detection circuit, which comprises an antenna, an oscillator circuit to charge the antenna, an operational amplifier operated as a unity gain follower which receives an antenna signal from the antenna, a detector circuit which detects changes in the antenna signal, and a comparator which actuates the motor in response to changes in the antenna signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.