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CENTRIFUGE INK TANKS AFTER INK FILL

IP.com Disclosure Number: IPCOM000027718D
Original Publication Date: 1999-Feb-28
Included in the Prior Art Database: 2004-Apr-09
Document File: 2 page(s) / 71K

Publishing Venue

Xerox Disclosure Journal

Abstract

Figure 1 illustrates a standard ink tank 10 having a free ink level 12 higher than the partially filed foam 14. This condition varies the quality of the prime of ink tank 10. It also affects print quality and possibly the cleaning cycle used to improve nozzle performance. By subjecting a filed tank to a short centrifuge cycle, the ink is forced into the foam 14 until it saturates, as shown in Figure 2. In Figure 2, a centrifuged ink tank 16 has its free ink level 12 lowered by the saturated foam 14.

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XEROX DISCLOSURE JOURNAL

CENTRIFUGE INK TANKS AFTER INK FILL

Robert M. White Richard D. Nelson Curtis Glenn Prince

Proposed Classification
U. S. C1. 347/020 Int. C1. B41j 2/015

FIG. 7 FIG. 2

72

74

- 72

/74

XEROX DISCLOSURE JOURNAL - Vol. 24, No. 1 JanuaryEebruary 1999 11

7

74

FIG. 3

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CENTRIFUGE INK TANKS AFTER INK FILL (Cont'd)

The current process of f~g ink tanks used in Thermal Ink Jet (TIJ) does not completely and uniformly saturate an open cell fdter foam in the bottom half of the tanks. Figure 1 illustrates a standard ink tank 10 having a free ink level 12 higher than the partially filed foam 14. This condition varies the quality of the prime of ink tank 10. It also affects print quality and possibly the cleaning cycle used to improve nozzle performance. By subjecting a filed tank to a short centrifuge cycle, the ink is forced into the foam 14 until it saturates, as shown in Figure 2. In Figure 2, a centrifuged ink tank 16 has its free ink level 12 lowered by the saturated foam 14.

Referring to Figure 3, two ink tanks 16 are placed in holders 18 and 20 of centrifuge 40 so that the foam filters 14 reside at the bottom of holders 18 and 20. Centrifuge 40 spins at approximately 1,000-Revolutions Per Minute (RPM) for five to ten seconds to move the level 12 downward to the filters 14. A consistent level of saturation achieved by this process provides for a more uniform operating condition of the...