Print mode and system to alleviate wait-banding
US5644683A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Mar 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved print mode and system for alleviating wait-banding is disclosed. When printing multiple passes over the same swath, such as when printing secondary colors in a color image, a hue shift can occur if the time between when the two passes are deposited are laid down is not regulated. This is true because the secondary color that results depends on how dry the ink from the first pass is when the second pass is deposited. These variations in color result in undesirable horizontal bands, a problem referred to as "wait-banding." Typical ink-jet printers compose in page sectors, but print in scans or passes. The time that it takes to compose the page sectors varies from sector to sector. These variations can cause differences in the time intervals between when overlapping passes will be printed, thus resulting in wait-banding. The disclosed method creates a running average for the passes based on past experience with when passes were made. This running average is used to space out the passes within a page sector so that the passes are more uniformly distributed in time, thus alleviating wait-banding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.