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Browse Prior Art Database

Improving Ink Jet Printer Throughput

IP.com Disclosure Number: IPCOM000114048D
Original Publication Date: 1994-Nov-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Lee, HC: AUTHOR [+2]

Abstract

A typical drop on demand color ink jet nozzle arrangement for a serial printer configuration is shown in Fig. 1, where the top most black nozzle, (1), is one pel distance below the bottom most color nozzle, (2). When printing black text and color together there are printing overheads that reduce the effective printing throughput. The color nozzles need to cover all of the page area that the black nozzles cover. Thus, there is a vertical overhead equal to the vertical distance from the top most color nozzle, (3), to the top most black nozzle, (1). This overhead can be reduced by one third, by having the top most black nozzle located at the same vertical location of the top most magenta nozzle, (4), and located horizontally in line with the top most cyan nozzle.

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This is the abbreviated version, containing approximately 81% of the total text.

Improving Ink Jet Printer Throughput

      A typical drop on demand color ink jet nozzle arrangement for a
serial printer configuration is shown in Fig. 1, where the top most
black nozzle, (1), is one pel distance below the bottom most color
nozzle, (2).  When printing black text and color together there are
printing overheads that reduce the effective printing throughput.
The color nozzles need to cover all of the page area that the black
nozzles cover.  Thus, there is a vertical overhead equal to the
vertical distance from the top most color nozzle, (3), to the top
most black nozzle, (1).  This overhead can be reduced by one third,
by having the top most black nozzle located at the same vertical
location of the top most magenta nozzle, (4), and located
horizontally in line with the top most cyan nozzle.  Another
detriment to printing throughput is that the nozzle array must
traverse a distance equal to the entire paper width plus the width of
the print nozzle array (horizontal distance from top most nozzle,
(3), to bottom most nozzle, (2)).  If the nozzles are packaged as
shown in Fig. 2, this overhead is reduced.  Finally, printing
throughput can be improved still further by printing while the
printhead is accelerating and decelerating during printhead reversals
occurring at the beginning or ending of print lines.  This would
entail the use of a linear encoder and droplet delay firing logic.

      In a drum configuration where the nozzle array traverses
l...