초록 ▼

A device for direct electrostatic printing is provided wherein a flow of toner particles in a electrical field from a toner source to the surface of an intermediate image receiving member is image-wise modulated by a printhead structure with printing apertures and control electrodes, and wherein the

A device for direct electrostatic printing is provided wherein a flow of toner particles in a electrical field from a toner source to the surface of an intermediate image receiving member is image-wise modulated by a printhead structure with printing apertures and control electrodes, and wherein the toner image of the intermediate image receiving member is transferred to a final substrate and fixed to that final substrate. The intermediate member has a surface energy lower than 40 mN/m and surface roughness Ra smaller than 3.0 .mu.m. The transfer of the toner image from the intermediate image receiving member to the final substrate can be aided by electrostatic attraction and/or by tackifying the toner image on the intermediate member.

대표청구항 ▼

[ I claim:] [1.] In a device for direct electrostatic printing comprising:a back electrode having a first electrical potential;a magnetic brush for delivering toner particles and having a surface carrying magnetic carrier particles and charged toner particles, said surface being at a second electric

[ I claim:] [1.] In a device for direct electrostatic printing comprising:a back electrode having a first electrical potential;a magnetic brush for delivering toner particles and having a surface carrying magnetic carrier particles and charged toner particles, said surface being at a second electrical potential, different from said first electrical potential, whereby a flow of charged toner particles is formed from said surface toward said back electrode;an intermediate image receiving member having an outer surface, said member interposed between said back electrode and said magnetic brush;means for moving said intermediate image receiving member in a first direction;a printhead structure interposed between said intermediate image receiving member and said magnetic brush, said printhead structure having printing apertures and control electrodes for image-wise modulating said flow of toner particles and depositing a toner image on said intermediate image receiving member; anda transport for conveying a final image receiving substrate near said intermediate image receiving member and a transfer member for attracting said toner image from said intermediate image receiving member to said final image receiving substrate;the improvement wherein said outer surface of said intermediate image-receiving member has a surface energy lower than 40 mN/m and surface roughness Ra smaller than 3.0 .mu.m.