Patent ID: 6671486
Filing Date: 2003-12-30
Classification: G03G

Abstract:
A common polarity duplexing electrostatographic reproduction machine comprising:a. a machine frame: b. recording media supply assembly mounted to said frame and including a media roll and means for supplying a web of recording media from said media roll; c. a first plurality of toner image producing electrostatographic modules mounted to said frame; each module of said first plurality of toner image producing electrostatographic modules including a first image forming surface, image forming devices, and charged toner particles having a first polarity, for producing a first set of toner images on said first image forming surface; d. a first means for transferring said first set of toner images onto a first side of said web of recording media; e. a second plurality of toner image producing electrostatographic modules mounted to said frame; each module of said second plurality of toner image producing electrostatographic modules having a second image forming surface, image forming devices, including charged toner particles having a polarity common with said first polarity, for producing a second set of toner images on said second imaging surface; f. a charged toner polarity reversing device mounted against said each module of said second plurality of toner image producing electrostatographic modules for reversing a polarity of toner particles forming said second set of toner images from said first polarity to a second and opposite polarity; and g. second means for transferring said second set of toner images having said second polarity onto a second side of said web of recording media.