Photocopying – Contact printing – Light boxes
Patent
1993-07-12
1996-11-26
Grimley, Arthur T.
Photocopying
Contact printing
Light boxes
355309, G03G 1520
Patent
active
055790976
ABSTRACT:
A sheet processing apparatus operating in xerographic printing apparatus employs a single-component magnetic toner. The inventive features of the sheet processing apparatus are directed toward smooth transportation and discharge of printing sheets sent through the printing apparatus, across a sheet transport guide, and through an image fixing and sheet transporting unit which finally discharges the printing sheets. Conductivity of the transport guide is selected by the material of which it is made, specified herein to have superficial resistivity in the range of ten thousand to one hundred million megohms. Charge applied to a printing sheet to electrostatically attract the magnetic toner during the xerographic printing is thus drained by the transport guide gradually enough not to disturb the adhesion of the toner to the sheet, yet rapidly enough to prevent the sheet from being curled upward by electrostatic attraction toward a residual toner container just over the downstream end of the guide, in the optimally compacted arrangement of the various components of the sheet processing and xerographic printing apparatus into a facsimile machine or the like.
REFERENCES:
patent: 4369729 (1983-01-01), Shigenobu et al.
patent: 4806970 (1989-02-01), Nakatomi et al.
patent: 5105228 (1992-04-01), Kato
patent: 5166737 (1992-11-01), Tomita
patent: 5285245 (1994-02-01), Goto et al.
Japanese Patent Laying-Open No. 61-130156, 1986.
Japanese Utility Model Laying-Open No. 59-120755, 1984.
Hayashi Daisuke
Tanaka Shin-ichi
Tomoe Tetsuro
Tsuchiya Hiroaki
Grimley Arthur T.
Lee Shuk Y.
Mita Industrial Co. Ltd.
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