Printing apparatus
US9522530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2016 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Apr 4, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2142
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing apparatus may comprise a print head including nozzles to eject liquid drops, a drop sensor to detect flying liquid drops ejected by at least some of the nozzles, and a controller. The controller is to control at least some of the nozzles to sequentially eject liquid drops while the drop sensor is at a predetermined position relative to the nozzles, to determine the actual position of the drop sensor relative to the nozzles based on a sensor profile including a nozzle location specific signal characteristic of the sequentially ejected liquid drops detected by the drop sensor, and to calculate an offset between the determined actual position and the predetermined position. The controller may take the offset into account in positioning the drop sensor relative to one of the nozzles to detect a liquid drop ejected from that nozzle in a subsequent operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.