Patent · US Active

Device and method for sealing a shaft to prevent the penetration of a toner mixture

US8224204B2 · kind B2 · utility

1Cited by

5References

19Claims

0Family size

Assignee

Oce Printing Systems GmbH · DE

Inventors

Florian Köfferlein · Birkenfeld, DE
Mehrad Biglari · Munich, DE

Key dates

Filing date	Feb 18, 2008
Grant date	Jul 17, 2012
Priority date	—
Expiry date	Feb 28, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG03G2215/0609
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In a device or method for sealing a shaft against penetration of a two-component toner mixture comprising magnetic carrier particles and toner particles, an annular, stationary sealing device is arranged radially at a distance of an annular gap around the shaft. The annular gap is charged with a magnetic field. The annular gap is filled with a mixture of a semi-fluid, highly viscous barrier medium and magnetic carrier particles, and wherein the mixture in the annular gap contains 40 to 85 percent by weight or 15 to 60 percent by volume of the magnetic carrier particles.

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