Photocopying – Contact printing – Light boxes
Patent
1992-08-26
1994-12-13
Fuller, Benjamin R.
Photocopying
Contact printing
Light boxes
355272, 355275, 355326, G03G 2100
Patent
active
053733541
ABSTRACT:
A color electrophotographic device includes, a color toner image producing device which produces a color toner image on a rotatable photo sensitive drum by forming four toner images thereon; an image transferring device which transfers the color toner image on the photo sensitive drum onto a recording medium; a fixing means which fixes the color toner image on the recording medium; a transferring device which transfers the recording medium; a recording medium selecting and feeding device which selects one of an ordinary paper and a transparent sheet to serve as the recording medium and feeds the selected one to the transferring device; and a control device which controls the operations of the devices referred to above and includes a first and a second control function which are rendered operative when the transparent sheet is selected as the recording medium, wherein the first control function causes the photo sensitive drum to perform one idle rotation before the image transferring device beings to transfer the color toner image carried on the photo sensitive drum onto the recording medium; and wherein the second control function causes the transferring device to reduce the transferring speed for the transparent sheet to a speed lower than that for the ordinary paper only during the operations of the image transferring device and the fixing means and the transferring speed reduction is accomplished after the last toner image has been formed on the photo sensitive drum and during the idle rotation thereof.
REFERENCES:
patent: 4578331 (1986-03-01), Ikeda et al.
patent: 4652115 (1987-03-01), Palm et al.
patent: 4788572 (1988-11-01), Slayton et al.
patent: 5182598 (1993-01-01), Hara et al.
Tadokoro Hiroyuki
Terashima Isamu
Wakamatsu Kazuhiro
Barlow John
Fuller Benjamin R.
Hitachi , Ltd.
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