EP0387919A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Improved print engine for color electrophotography

Assignee: Colorocs Corp

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Filing: 1986-10-21

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Granted: —

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Expires: 2006-10-21

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Abstract

Abstract Electrophotographic system of the type including a first closed belt (38) carrying a photoreceptor thereon having a characteristic frst length, said first belt being driven around a pair of rollers (118, 168) laterally disposed so that said first belt includes an elongated horizontal upper surface, an image source (120) disposed above said first belt for creating an electrostatic image on said photoreceptor in response to light from said image source, at least three developer modules (136a-136c) for carrying at least three distinct toners disposed above said elongated horizontal upper surface of said first belt, a fuser (62, 187), and a paper tray (59). Thereby a second electrostatic transfer closed belt (39) having a characteristic second length, said second length being nominally an integer submultiple of said first length, said second electrostatic transfer closed belt being driven about a plurality of rollers (170, 171) so that a predetermined portion (178) of said second belt contacts said first belt at one of said pair of rollers; each of said developer modules including a toner exit opening, all of said toner exit openings being disposed in a common plane substantially parallel to, and above, said elongated horizontal upper surface of said first belt; said fuser ( 62, 187) being disposed below said elongated horizontal upper surface of said first belt and to one side of the bottom most one of said plurality of rollers carrying said second belt; and said paper tray (59) being disposed below said first belt and aligned with said fuser so as to provide a substantially straight horizontal paper path from said paper tray under said bottom most one of said plurality of rollers carrying said second belt, on to said fuser.

Inventors

👤 Charles S. Palm
👤 Danny Lee Slayton
👤 Peter Francis Sampson
👤 David R. Davis
👤 Maurice S. Wheatley, Jr.
👤 Gregory Alan Chatham
👤 Wayne Curtis Jones
👤 Kirk William Charles
👤 Anthony J. Ireland
👤 Khosrow Lak

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-06 14:06

CPC Classifications

B; B82; B82Y; B82Y15/00; G; G03; G03G; G03G15/00; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0173; G03G15/14; G03G15/16; G03G15/1605; G03G15/1615; G03G2215/00; G03G2215/00025; G03G2215/00029; G03G2215/00033; G03G2215/00037; G03G2215/00042; G03G2215/16; G03G2215/1647; G03G2215/1661

Claims Analysis

Total Claims: 1

Claim 1

Independent Claim 283 words

Electrophotographic system of the type including a first closed belt (38) carrying a photoreceptor thereon having a characteristic frst length, said first belt being driven around a pair of rollers (118, 168) laterally disposed so that said first belt includes an elongated horizontal upper surface, an image source (120) disposed above said first belt for creating an electrostatic image on said photoreceptor in response to light from said image source, at least three developer modules (136a-136c) for carrying at least three distinct toners disposed above said elongated horizontal upper surface of said first belt, a fuser (62, 187), and a paper tray (59), characterized by: a second electrostatic transfer closed belt (39) having a characteristic second length, said second length being nominally an integer submultiple of said first length, said second electrostatic transfer closed belt being driven about a plurality of rollers (170, 171) so that a predetermined portion (178) of said second belt contacts said first belt at one of said pair of rollers; each of said developer modules including a toner exit opening, all of said toner exit openings being disposed in a common plane substantially parallel to, and above, said elongated horizontal upper surface of said first belt; said fuser (162, 187) being disposed below said elongated horizontal upper surface of said first belt and to one side of the bottom most one of said plurality of rollers carrying said second belt; and said paper tray (59) being disposed below said first belt and aligned with said fuser so as to provide a substantially straight horizontal paper path from said paper tray under said bottom most one of said plurality of rollers carrying said second belt, on to said fuser.

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