Charge emission stability of ionographic print heads

Igor Kubelik

doi:10.1117/12.19771

1 May 1990 Charge emission stability of ionographic print heads

Igor Kubelik

Proceedings Volume 1252, Hard Copy and Printing Technologies; (1990) https://doi.org/10.1117/12.19771
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

Stable charge emission from ionographic printheads is a crucial for high quality printing. Differences in gray scale and dot size will occur with varying amounts of emitted charge. Charge output analysis on Delphax printheads, using RF-bursts for charge generation have been conducted. Significant variations between negative and positive charge output has been recorded. It has been shown that these variations can be evoked by differences of dielectric surface charging rates during oppositely charged particles emission. High instability in negative charge output, particularly at the beginning of RF burst has been observed. Charge output stability has been significantly improved by enlarging of ratio between speed of RF-voltage increase and rate of dielectric surface charging, along with increasing the number of ionization sites. Improvements of two orders have been experimentally confirmed.

Citation Download Citation

Igor Kubelik "Charge emission stability of ionographic print heads", Proc. SPIE 1252, Hard Copy and Printing Technologies, (1 May 1990); https://doi.org/10.1117/12.19771

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