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Replenishment Bottle for Ink Jet Printers

IP.com Disclosure Number: IPCOM000052734D
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 3 page(s) / 59K

Publishing Venue

IBM

Related People

Fluty, PE: AUTHOR [+2]

Abstract

In continuous or Sweet-type ink jet printers, i.e., the IBM 6640, volatile components tend to evaporate as the ink circulates through the system. As the non-volatile components become more concentrated, the ink within the bottle or container increases in viscosity. Most printers of the continuous ink jet variety can handle inks within a viscosity range, and when the viscosity is increased beyond some predetermined amount, depending upon system design, the bottle must be discarded. Described are two embodiments of a single ink jet bottle, having two chambers, which replenishes the volatile components of the ink as they evaporate.

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Replenishment Bottle for Ink Jet Printers

In continuous or Sweet-type ink jet printers, i.e., the IBM 6640, volatile components tend to evaporate as the ink circulates through the system. As the non-volatile components become more concentrated, the ink within the bottle or container increases in viscosity. Most printers of the continuous ink jet variety can handle inks within a viscosity range, and when the viscosity is increased beyond some predetermined amount, depending upon system design, the bottle must be discarded. Described are two embodiments of a single ink jet bottle, having two chambers, which replenishes the volatile components of the ink as they evaporate. In this manner, an increase in concentration of the non-volatile components is inhibited, and the character yield per bottle of ink is increased since a much larger fraction of the ink may be employed before it becomes necessary to discard the bottle.

Referring now to Fig. 1, a two-chamber ink jet bottle 10 is schematically shown therein. Ink will be contained in chamber 11 which is essentially the same as the existing single-chamber bottle employed with the 6640. However, within chamber 11 is an ink return standpipe 12 with a rubber grommet 13 at the upper end of the standpipe 12 and a tube 14 connecting this standpipe 12 to a second chamber 15. Chamber 15 also contains an upstanding standpipe 16 and rubber grommet 17, the standpipe being coupled through a needle 16a to the atmosphere. In a manner which will be described hereinafter, the replenishment fluid in chamber 15 will be coupled to chamber 11 by way of the connecting pipe or tube 14. The levels of replenishment fluid in chamber 15 and ink in the ink return standpipe 12 will be essentially the same. The rubber seal or grommet 13 located on top of the standpipe 12 prevents the mixing of the two different fluids until the bottle is placed on the printer and the printer is running.

The bottle holder which may be placed on the machine includes a base portion 17a through which the vent pipe 16a, ink return needle 12a and ink supply needle 18 are placed. As shown, the ink return needle has a small aperture 12b at the upper end thereof such that when the base is in place against the replenishment ink bottle (i.e., passed through the rubber septums 19, 20 a...