Patent · US Expired

Device for collecting a toner carrier in an image developing apparatus

US5187529A · kind A · utility

5Cited by
11References
1Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJul 28, 1989
Grant dateFeb 16, 1993
Priority date—
Expiry dateJul 28, 2009

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03G15/095
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A device for collecting a carrier in an image developing apparatus upon developing with a two-component developer, wherein a carrier collecting magnet roll having an insulator surface thereon and a rotatable magnet portion therein, is positioned close to a photosensitive material, contacted by a scraper at the surface thereof, and driven by a driving motor, so that the carrier gathering on the roll even at the ends thereof does not cause any grounding of the developing bias applied to the developing apparatus due to the insulator surface of the roll. It is therefore possible to achieve a drastically improvement in printing quality.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.