Gray scale ink jet printer
US5745131A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1995 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Aug 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/102
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing machine of the type in which liquid ink is deposited on a recording medium for printing gray scale images. The printing machine includes a printhead having ink ejecting nozzles of different sizes. Nozzles of the same size are arranged in groups and groups of nozzles are offset from one another. Ink drops of one group are deposited at locations corresponding to the points of a grid and ink drops of another group are deposited at locations corresponding to points not on the grid. Gray scale printing is achieved by the variation in drop size produced by different groups of nozzles as well as offsetting nozzles of one or more groups of nozzles from a reference group of nozzles printing on the points of a grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.