Ejection detection device, ejection detection method, and printing apparatus
US9033452B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Feb 28, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The objective of the present invention is to provide an ejection detection device with an inexpensive and simple structure that can appropriately detect conditions of nozzles, without the control of the quantity of liquid ejected from the nozzles being required. Therefore, for the ejection detection device of the present invention, a light-emitting unit emits light to a light-receiving unit in a direction in which a plurality of nozzles is arranged in a print head. The ejection detection device detects the condition of a nozzle to be detected, which ejects the liquid droplet. At this time, the emission intensity of the light-emitting unit or the responsivity of the light-receiving unit is controlled by the print head in accordance with the location of the nozzle to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.