| 摘要 |
<p>Toner dispensing cartridge (10) for an electrophotographic copying machine, the cartridge having an exit aperture (20) for dispensing toner material into the machine, and the exit aperture being closable by a sliding seal arrangement (30, 32). The sliding seal arrangement comprises an inner sliding seal (30) and an outer sliding seal (32) which are operated successively on insertion of the cartridge into, and removal of the cartridge from, the machine. When the cartridge is removed from the machine, and the seal arrangement is in the closed position, the outer seal covers, and prevents access to, the inner seal. Since only the inner seal is in direct contact with the toner, and the outer seal prevents access to the inner seal, clean insertions and withdrawals of the cartridge are possible, with minimum risk of contamination to operator or machine.</p> |
