Power supply device, conveyance apparatus, and image forming apparatus
US10843495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2019 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Sep 23, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A power supply device includes a power supply line, control circuitry, and a first switch. The power supply line supplies voltage from a first power supply unit to a load. The control circuitry controls voltage supply from the first power supply unit. The first switch is connected between a second power supply unit and the control circuitry. The control circuitry causes the first power supply unit to start the voltage supply on condition that the first switch is in a closed state and a voltage of the power supply line is not greater than a first threshold voltage, and causes the first power supply unit to start the voltage supply on condition that the voltage of the power supply line is not greater than a second threshold voltage higher than the first threshold voltage when the first switch changes from an open state to the closed state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.