REDUCTION OF SPOT MISPLACEMENT THROUGH ELECTROSTATIC FOCUSING OF UNCHARGED DROPS

A method and apparatus which laterally focusses aqueous ink drops onto a substrate, using electric fields. The drops are not charged, and focusing results from the forces on the uncharged dielectric drop that occur in a nonuniform electric field. It is shown that initial lateral velocity misdirectio...

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Bibliographic Details
Main Authors STEARNS, RICHARD G, RICHLEY, EDWARD A
Format Patent
LanguageEnglish
French
Published 29.04.2003
Edition6
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:A method and apparatus which laterally focusses aqueous ink drops onto a substrate, using electric fields. The drops are not charged, and focusing results from the forces on the uncharged dielectric drop that occur in a nonuniform electric field. It is shown that initial lateral velocity misdirection of the drops is corrected using electric field s. Lateral velocities which would produce drop displacements of -50.mu.m from their intended positions, at a height of 1mm above the ink surface, may be corrected to produce displacements of less than 2.5.mu.m.
Bibliography:Application Number: CA19992271608