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公开(公告)号：BR7508376A
公开(公告)日：1976-09-08
申请号：BR7508376
申请日：1975-12-17
Applicant: IBM
Inventor： HELINSKI E , ZABLE J
IPC: B41J2/075 , B41J2/02 , B41J2/035 , B41J2/10 , G06K15/10 , G06K15/22 , H04N1/034 , B41M1/42 , B05B1/02
Abstract: In an ink jet recorder, a ferrofluid ink is supplied under pressure to a nozzle to form a continuous ink jet stream. The jet stream is subjected to two or more perturbation forces out-of-phase with each other causing the satellites and drops to fast merge. Plural electromagnetic transducers are located at spaced locations along the stream and energized to produce out-of-phase perturbations on the stream. The spacing of the transducers is differentially related to spacing of varicosities or ink drops produced by first transducer. The out-of-phase perturbations can also be obtained using an electromechanical transducer and electromagnetic transducers located out-of-phase or energized out-of-phase with each other.
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公开(公告)号：BR7508377A
公开(公告)日：1976-09-08
申请号：BR7508377
申请日：1975-12-17
Applicant: IBM
Inventor： ZABLE J , HELINSKI E , LEE H
Abstract: A continuous jet stream of a ferrofluid ink is broken into individual drops by an asymmetrical perturbation force applied to the stream. The ink, as it exits from an orifice under pressure, is excited by an electromagnetic transducer energized with an asymmetrical excitation signal having a fundamental and higher harmonics. An asymmetrical excitation signal, such as a sawtooth, having a substantial second and/or third harmonics content which produce an excitation signal with different rise and fall times can form a stream of drops free of satellites. Asymmetry of magnetic field forces can be produced with single stage or multi-stage transducers located at spaced positions along the stream. Asymmetry can also be produced using an electromagnetic transducer having a non-uniform gap.
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