BIDIRECTIONAL INK JET PRINTING

Ink jet print quality is improved and higher pen speed permitted by a bidirectional printing protocol. According to the new protocol, each individual character to be printed is first partitioned into a leading portion and a trailing portion. The trailing portion includes all trailing edge bits. Only...

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Bibliographic Details
Main Authors MAZE, ROBERT C, TRUEBA, KENNETH E
Format Patent
LanguageEnglish
Published 08.11.1995
Edition5
Subjects
CALCULATING
COLOUR PRINTING
COMPUTING
CORRECTION OF TYPOGRAPHICAL ERRORS
COUNTING
HANDLING RECORD CARRIERS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PHYSICS
PRESENTATION OF DATA
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
RECOGNITION OF DATA
RECORD CARRIERS
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:Ink jet print quality is improved and higher pen speed permitted by a bidirectional printing protocol. According to the new protocol, each individual character to be printed is first partitioned into a leading portion and a trailing portion. The trailing portion includes all trailing edge bits. Only the leading portion is printed on a forward pass of the ink jet pen. The trailing portion is printed on a reverse pass of the pen, so that trailing edge ink drops are instead printed as leading edge ink drops. As a result, satellite ink drops are directed toward the center of the character, where they are covered by primary ink drops, thereby minimizing character edge roughness associated with exposed satellite ink drops.
Bibliography:Application Number: EP19930304055