Image forming apparatus controlling power from a commercial AC power supply to a heater and detecting current flowing in a power supply path from the commercial AC power supply to the heater
US8494383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2010 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Aug 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2039
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Part of a plurality of power levels of control patterns selected to control power supplied from an AC power source to a heater of an image forming apparatus include power levels of a) waveforms in which power is supplied in part of negative and positive half cycles in order after no power supply during a one half of a positive half cycle, and waveforms in which power is supplied in part of a positive cycle after no power supply during one half of a negative half cycle, or b) waveforms in which power is supplied in part of positive and negative half cycles in order after no power supply during one half of a negative half cycle, and waveforms in which power is supplied in part of a negative half cycle after no power supply during one half of a positive half cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.