Bj Cartridge; Color Bj Cartridge Structure - Canon BJC-55 Service Manual

BJC-50

3.2 BJ Cartridge

3.2.1 Color BJ cartridge structure

The color BJ cartridge contains a 136-nozzle print head (64 black nozzles, 24 yellow
nozzles, 24 magenta nozzles, and 24 cyan nozzles) for four colors. The print head,
black ink cartridge, and color ink cartridges are designed to be replaced respectively.
a) Air hole
Each the black and colored ink cartridge has an air hole at the same pressure at the
atmospheric pressure.
b) Ink sponge
The ink sponge in the black ink cartridge absorbs black ink. The color cartridge has
three ink sponges, each of which absorbs each color ink.
c) Ink supplier
The ink supplier supplies a constant amount of ink to the connection among the
head, black ink cartridge and color ink cartridge.
d) Bubble jet head unit
The bubble jet head unit consists of 136 nozzles and signal contacts.
Each nozzle has two heaters located one in front of the other. By controlling the
temperature of the heaters, the small and large dots can be printed.
e) Holder
The holder has a partition between the black ink cartridge and the color ink
cartridge to prevent color mixture and to prevent from being mounted incorrectly the
black ink cartridge and the color ink cartridge.
Ink Sponges
Ink Supplier
Ink Suppliers
Holder
Figure 4-14 Color BJ Cartridge
4-21
Part 4: Technical Reference
Ink Sponge
Air Holes
Bubble Jet Head Unit