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Browse Prior Art Database

Satellite Drop Remover

IP.com Disclosure Number: IPCOM000085641D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Pelkie, RE: AUTHOR [+2]

Abstract

Satellite drops can be effectively removed from an ink jet drop stream, by directing a high-pressure air jet of a diameter approximating that of the satellite drops continuously against the stream. The jet is relatively ineffectual in displacing the large drops.

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Satellite Drop Remover

Satellite drops can be effectively removed from an ink jet drop stream, by directing a high-pressure air jet of a diameter approximating that of the satellite drops continuously against the stream. The jet is relatively ineffectual in displacing the large drops.

Referring to the figure, as ink jet stream 1 issues from nozzle 2, it breaks into drops 3 within charge ring 4. Frequently, satellite drops 5 are formed between each pair of drops 3. The satellite drops 5 are unwanted, since they are not deflected along the same trajectories as the larger drops 3 during printing.

Charge ring 4 is formed with an opening 6 to which pressurized air is supplied. The diameter of the air jet is approximately equal to that of the satellite drops 5 and is continuously directed toward the formed drops. Since the air pushes the drops in proportion to the ratio of drop surface area to drop volume, the small satellite drops 5 are much more readily deflected as compared to the principal drops 3. The deflected satellite drops 5 impinge onto a stainless steel mesh 7 connected to a vacuum, and are removed from the charge ring 4 and returned to the ink reservoir.

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