Coupling apparatus, development cartridge and...

Details Coupling apparatus, development cartridge and... Coupling apparatus, development cartridge and...

2005-05-10

2005-05-10

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Photoconductive member

C399S120000

Reexamination Certificate

active

06892042

ABSTRACT:
A coupling apparatus, a development cartridge, and an electrophotographic printer having the coupling apparatus. The coupling apparatus transfers a rotation force in a connected state. The coupling apparatus has a first coupler having a cylindrical-type connection portion at an end and a spiral rib spirally protruded at an outer circumference of the connection portion; and a second coupler having a circular-type main hole depressed at an end corresponding to the connection portion, and a spiral groove formed at an inner circumference of the main hole corresponding to the spiral rib. The connection portion and the spiral rib are relatively connected with the main hole and the spiral groove by being pressed, and transmit a rotation force by being rotated together.

REFERENCES:
patent: 6032013 (2000-02-01), Niizawa
patent: 6173146 (2001-01-01), Wang et al.

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