Electrostatically and/or magnetically attractable toner powder
US6514653B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1996 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Apr 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Dry toner particles are provided wherein the toner resin includes a mixture of two polymer A and B, A and B being chosen such that an extruded slab with thickness 250 &mgr;m of a 50:50 mixture of both has a transmission density (DM) being between 0.10 and 1.00 higher than the sum of half the transmission density of a 250 &mgr;m extruded slab of polymer A alone (DA) and half the transmission density of a 250 &mgr;m extruded slab of polymer B alone (DB). The polymers A and B are mixed in a weight ratio between 5:1 to 1:5 and make up at least 25% by weight of the total toner resin. The polymer A is a polyester and the polymer B is a polyester or a specified styrene-acrylic copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.