Ink cartridge having one chamber surrounding another chamber

Details Ink cartridge having one chamber surrounding another chamber Ink cartridge having one chamber surrounding another chamber

2008-01-01

2008-01-01

Pham, Hai (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S085000

Reexamination Certificate

active

07314272

ABSTRACT:
An ink cartridge in which a space inside the ink cartridge is divided by a cylindrical bulkhead into two parts, a negative pressure generator chamber located inside the bulkhead and a liquid chamber located outside the bulkhead. The negative pressure generator chamber communicates with the atmosphere via an air intake port, communicates with an ink supply port, and contains a negative pressure generator. The liquid chamber contains liquid ink directly. The negative pressure generator chamber and the liquid chamber communicate with each other only via a communicating portion provided in the bulkhead. The entire peripheral surface of the lower portion of the negative pressure generator is in contact with the ink in the liquid chamber through the communicating portion continuously provided in the bulkhead.

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patent: 2000-301740 (2000-10-01), None

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