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Nonuniform Ink Jet Perturbation

IP.com Disclosure Number: IPCOM000088593D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Fillmore, GL: AUTHOR [+2]

Abstract

In an ink jet head such as illustrated, a half-cylinder perturbation device 10 is used to perturbate the fluid in cavity 11 which affects the ink as it is forced through a series of nozzles 12 to form ink jet streams 13. The perturbation causes each stream to break up into a series of drops 14. There appears to be an end effect due to various modes of vibration of the perturbation device 10, resulting in nonuniform drop generation at the ends of the array. Another end effect is the result of the shape of the flow cavity.

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Nonuniform Ink Jet Perturbation

In an ink jet head such as illustrated, a half-cylinder perturbation device 10 is used to perturbate the fluid in cavity 11 which affects the ink as it is forced through a series of nozzles 12 to form ink jet streams 13. The perturbation causes each stream to break up into a series of drops 14. There appears to be an end effect due to various modes of vibration of the perturbation device 10, resulting in nonuniform drop generation at the ends of the array. Another end effect is the result of the shape of the flow cavity.

These end effects are compensated for by electrically driving each of the piezoelectric sectors 15 of the perturbation device 10 independently in phase and/or amplitude. For example, driving the end segments 16 with a higher amplitude than those in the middle, the falloff at the ends of the array is eliminated.

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