Seal for toner cartridge assembly
View Patent ↗A recharged toner cartridge assembly is disclosed in which a sealing member is provided between the toner hopper and the feed roller compartment to prevent leakage of the recharged toner powder. In particular, the sealing member is fixed to the bottom surface of the feed roller compartment before the compartment is brought to engage with the toner hopper, thus avoiding any inadvertent messing of the toner powder in the toner hopper.
1. A recharged toner cartridge assembly comprises:
a toner hopper for containing recharged toner powder, said toner hopper having a generally flat upper surface with an opening;
a feed roller compartment for dispensing said toner power, said feed roller compartment having a generally flat bottom surface with an opening for engaging with said upper surface of said toner hopper;
a sealing member provided between said two flat surfaces for sealing around said openings when said two flat surfaces engage each other after recharging;
wherein said sealing member is adapted to be fixed to said bottom surface of said feed roller compartment before said two flat surfaces engage each other, said sealing member is a flat sealing foam with a slot which matches said openings, and said sealing foam has an upper surface adapted to be fixed to said bottom surface of said feed roller compartment by an adhesive.
2. The recharged toner cartridge assembly of claim 1 wherein said upper surface of said sealing foam comprises said adhesive, which is protected by a protective sheet before said protective sheet is removed.
3. A method of sealing a recharged toner cartridge assembly including a toner hopper having a flat upper surface with an opening and a feed roller compartment having a flat bottom surface with an opening, comprising the steps of:
fixing a sealing member to said bottom surface of said feed roller compartment, and around said opening of said bottom surface; and
after recharging of toner powder to said toner hopper, engaging said feed roller compartment with said toner hopper such that said sealing member is sandwiched between said two flat surfaces around said openings.
4. The method of claim 3 wherein said sealing member is fixed to said bottom surface of said feed roller compartment by an adhesive.
5. The method of claim 4 wherein said sealing member is a flat sealing foam with an upper surface provided with an adhesive protected by a removable protective sheet.
6. The method of claim 3 wherein said sealing member is fixed to said bottom surface of said feed roller compartment by a mechanical fixture.
7. The method of claim 6 wherein said mechanical fixture comprises a plurality of screws.
8. The method of claim 6 wherein said mechanical fixture comprises a plurality of pin-hole connections.