Patent · US Expired

Developing apparatus and electrostatic record apparatus

US6879800B2 · kind B2 · utility

5Cited by
3References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 18, 2002
Grant dateApr 12, 2005
Priority date—
Expiry dateDec 30, 2022

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG03G15/0921
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A position where a transport amount regulation member is opposed to a developing roller is in an area wherein the magnetic flux density in the tangent line direction becomes 95% or less of the maximum value upstream in the developer transport direction from the position at which the magnetic flux density in the normal direction formed by two magnetic poles on both sides of the transport amount regulation member on the sleeve roller surface of the developing roller becomes 0 gausses and is in an area wherein the magnetic flux density in the normal direction becomes 90% or less of the maximum value of the upstream pole in the developer transport direction.

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