US 4,290,073 AGranted

Ink-jet recording apparatus

AssigneeRicoh Company, Ltd.

InventorsKoichiro Jinnai, Kyuhachiro Iwasaki

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Abstract

An ink-jet recording apparatus wherein the ink jet is issued from an ink head or manifold and broken into drops. The selected ink drop is charged and made to pass through a first deflection means which deflects the charged ink drop in two mutually perpendicular directions, one being in parallel with a main scanning direction while the other being perpendicular to said direction. After leaving the first deflection means, the charged ink drop passes through a second deflection means which can cancel or nullify the deflection of the charged drop in said other direction, leaving the charged drop subject to the deflection in said main scanning direction so as to be steered to a predetermined point on a recording medium. The ink drops which are not used are not charged and travel a straight trajectory so as to be trapped by a gutter between the first and second deflection means.

Claims3

Dependent claims

An ink-jet recording apparatus characterized by the provision of

(a) an ink head or manifold from which the ink jet is issued,
(b) a charge electrode for imparting a charge to the selected ink drop broken off from said ink jet in response to a video signal,
(c) a first deflection means for deflecting the charged ink drop in a direction which may be resolved into two mutually perpendicular component directions, one being parallel with a main scanning direction while the other being in the direction perpendicular to said main scanning direction,
(d) a second deflection means for cancelling the deflection in said direction perpendicular to said main scanning direction and
(e) a gutter for trapping the unused ink drops interposed between said first deflection means and said second deflection means in front of a recording medium upon which the charged ink drops strike and disposed at a level upward or downward from the printing level in said main scanning direction.

2 more elements

Dependencies are inferred from the claim text.