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Browse Prior Art Database

Nozzle Exit Face

IP.com Disclosure Number: IPCOM000085284D
Original Publication Date: 1976-Mar-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Denny, CM: AUTHOR

Abstract

The nozzle exit face of a jet printer is reduced in size to reduce the meniscus size appearing on the exit face when the jet stream is shut off.

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Nozzle Exit Face

The nozzle exit face of a jet printer is reduced in size to reduce the meniscus size appearing on the exit face when the jet stream is shut off.

When the jet stream of an ink jet or the like is shut off, a meniscus 11 forms on the exit face 13 of nozzle 15. The meniscus 11 limits the closeness to which the charge electrode 17 can be brought to nozzle 15. If the meniscus 11 touches charge electrode 17, a short circuit occurs resulting in nozzle destruction. By decreasing the size of exit face 13, the meniscus size is reduced allowing electrode 17 to be brought closer to nozzle 15. Close spacing is necessary when drop break off distances 19 are short, since drop break off must occur inside the charge electrode 17.

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