Electrostatic and magnetic transfer enhancing apparatus for conducting and magnetically attracting toner
US4274361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Nov 2, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y15/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
Electrostatic and magnetic transfer apparatus for conducting and magnetically attracting electronically conductive toner from the surface of a dielectric drum to a secondary substrate such as plain paper wherein a fixed permanent magnet disposed within a hollow cylindrical roller located at the image transfer point within a portion of a continuous loop of semi-conductive material supplies additional attractive force between the toner and the substrate exclusively at the image transfer point which in combination with the electrostatic transfer force applied to the imaged dielectric surface of the drum by means of a voltage potential applied to the hollow cylindrical roller, produces a dense, well defined pattern of intelligence replicating what was originally applied to the dielectric surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.