| 摘要 |
<p>1312806 Electrophotography XEROX CORP 15 June 1970 [19 June 1969] 28848/70 Heading G2H A carrier for a dry developer comprises a core material and a resin coating, the core material comprising 95-99 parts of iron, 0À5-2 parts of carbon, 0À5-2 parts of manganese, 0À5-2 parts of silicon, 0À03-0À1 parts of aluminium, 0À1-0À05 parts of phosphorus, and 0À02-0À05 parts of sulphur. The resin may be natural, thermoplastic or thermo-setting. The carrier has a particle size of 50-1, 000 microns and a density of at least 7 gm/cc. 1 part of toner to 10-200 parts of carrier are employed. Toners and coating resins are specified.</p> |
