Recording material detection device, image forming apparatus, and ultrasonic emission device
US12265061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2021 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Jul 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device includes a sensor including an emission unit which emits ultrasonic waves and a reception unit which receives the ultrasonic waves, the emission unit and the reception unit being arranged opposite each other across a conveyance path through which a recording material is conveyed, an instruction unit which supplies, to the emission unit, a first drive input or a second drive input larger than the first drive input, and a detection unit which detects information about a grammage of the recording material based on a first value obtained by the reception unit receiving ultrasonic waves emitted from the emission unit with the first drive input supplied thereto and coming not through the recording material and a second value obtained by the reception unit receiving ultrasonic waves emitted from the emission unit with the second drive input supplied thereto and coming through the recording material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.