Browse Prior Art Database

Ink Reservoir for Ink Jet Printers

IP.com Disclosure Number: IPCOM000089545D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Robbins, MS: AUTHOR [+2]

Abstract

In ink jet printers and the like utilizing a pressurized ink bottle, many times during bottle installation contamination of the drop deflection plates and other carrier-mounted hardware occurs because of rapid air flow into the reservoir assembly. A typical design of an ink supply system for an ink jet printer is illustrated in U. S. Patent 3,929,071.

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Ink Reservoir for Ink Jet Printers

In ink jet printers and the like utilizing a pressurized ink bottle, many times during bottle installation contamination of the drop deflection plates and other carrier-mounted hardware occurs because of rapid air flow into the reservoir assembly. A typical design of an ink supply system for an ink jet printer is illustrated in U. S. Patent 3,929,071.

As shown in the figure, the improved reservoir design comprises an open chamber 10 filled with baffling material and having a siphon tube entry port 11 and a gutter tube entry port 12 as well as an exit port 13. The entrance ports 11 and 12 are located at the top of the chamber, while the exit port is located at the bottom thereof at the lowest point. Undeflected ink drops (those not used in printing) enter the reservoir through the gutter tube port 12, while only small amounts of ink expelled from the head valve during normal operation enter through the siphon tube port 11. The entering ink falls to the bottom of the reservoir chamber and is drawn out through the exit port by the bottle vacuum.

Under certain conditions when the growth of vacuum in the bottle is inhibited for a period, the entering ink will accumulate in the chamber. The accumulation will continue until bottle vacuum is restored, and will yield a calculable worst-case level in the reservoir chamber. This level is below the entrance points of the siphon tube port and the Butter tube port. Under these circumstances,...