Auto-toner sensor
US4916488A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Dec 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0851
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auto-toner sensor capable of performing an initial adjustment of the sensitivity of toner density detection automatically by means of a simple configuration is disclosed. The auto-toner sensor includes a sensor for detecting a toner density, and producing a sensor output signal indicating the detected toner density, the sensitivity of the sensor being adjustable by a control signal to be supplied to the sensor; a device for comparing a value of the sensor output signal with a prescribed reference value indicating an appropriate level of the toner density, to produce a comparison signal indicating a result of the comparison; and a device for producing in accordance with the comparison signal a control signal, to be given to the sensor, which adjusts the sensitivity of the detection of the toner density, the control signal having a value such that the value of the sensor output signal is substantially equal to that of the reference value when the toner has the density at the appropriate level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.