Method of controlling electric charge of a two-component developing agent
US5858600A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0609
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner and a carrier are so combined together as to substantially satisfy the following formula (1), ##EQU1## wherein Qmax is a maximum amount of electric charge (.mu.C/g) of the toner, V.sub.T/C is a contact potential difference (V) of the toner to the carrier, .tau.r is a relaxation time constant (sec) of the toner, .tau.g is a charging time constant (sec) of the toner, and k is a coefficient (F) determined depending upon the kinds of the toner and the carrier. This method makes it possible to so combine the toner and the carrier together that the amount of electric charge of the two-component developing agent becomes a maximum based on the contact potential difference (V.sub.T/C) of the toner to the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.