Thermal ink jet pen body construction having improved ink storage and feed capability

Patent 4771295 Issued on September 13, 1988. Estimated Expiration Date:

July 1, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3441950

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Inventors

Application

No. 06/880774 filed on 07/01/1986

US Classes:

347/87, With integral ejector347/93With fluid treatment (e.g., filtering)

Examiners

Primary: Hartary, Joseph W.

Attorney, Agent or Firm

Bethurum; William J.

International Classes

B41J 2/175 (20060101)
B41J 2/175 (20060101)
G01D 15/16 (20060101)
G01D 15/16 (20060101)
G01D 15/18 (20060101)
G01D 15/18 (20060101)

Abstract

The novel pen body construction described herein includes multiple ink storage compartments communicating with a multi-orifice printhead, and these compartments are adapted to receive sections of ink-storage foam. Preferably, this foam is a reticulated polyurethane foam of controlled porosity and capalarity and is especially well suited for storing different ink colors, such as cyan, magenta and yellow. However, single compartment black ink storage is also within the scope of this invention.