Eric Scott Ross

US Patent:

56446837, Jul 1, 1997

Filed:

Mar 3, 1995

Appl. No.:

8/398223

Inventors:

Eric P. Ross - Camas WA
Thieu X. Dang - Vancouver WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06K 1500

US Classification:

395108

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.

US Patent:

62674633, Jul 31, 2001

Filed:

May 11, 1998

Appl. No.:

9/076601

Inventors:

Ronald R. Paulsen - Vancouver WA
Thomas B. Pritchard - Brush Prairie WA
David J. Lowe - Vancouver WA
Eric P. Ross - Camas WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 29393

US Classification:

347 19

Abstract:

The present disclosure relates to a replaceable printing component for an ink-jet printing system having at least one replaceable printing component. The replaceable printing component includes an electrical storage device responsive to printing system control signals for transferring information between the printing component and the ink-jet printing system. The electrical storage device includes a storage portion containing a plurality of data fields associated with the replaceable printing component. Included in the electrical storage device is a plurality data values stored in each of the plurality of data fields. Also included is a control portion responsive to control signals for selectively transferring a block of data values having a preselected size between the ink-jet printer and the storage portion. The plurality of data fields are sized and arranged in the storage portion to ensure each of the plurality of data fields is transferred in a single data transfer between the ink-jet printer and the storage portion.