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Browse Prior Art Database

INK JET MARKER USING ASYNCHRONOUS DROP FORMATION IN A CONTINUOUS STREAM

IP.com Disclosure Number: IPCOM000024781D
Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-03
Document File: 2 page(s) / 91K

Publishing Venue

Xerox Disclosure Journal

Abstract

The present disclosure relates to ink jet printing and in particular, to a droplet excitation technique which facilitates controlled application of charge onto ink jet droplets. Referring now to the figure, there is illustrated a droplet generator 1 having a nozzle 2 directing a column or stream 3 of ink toward a recording medium 4. It is possible to impart a localized disturbance to the column 3 such that a single droplet 5 breaks off earlier in the column than other droplets 6 surrounding that drop. The single droplet 5 is charged differently than the other droplet 6 enabling an encoding of information and non-synchronous ink jet operation.

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I XEROX DISCLOSURE JOURNAL

INK JET MARKER USING ASYNCHRONOUS Prooosed Classification DROP FORMATION IN A CONTINUOUS
STREAM Int. C1. Gold 15/18

U.S: C1. 346/75

Cary Pincus

The present disclosure relates to ink jet printing and in particular, to a droplet excitation technique which facilitates controlled application of charge onto ink jet droplets. Referring now to the figure, there is illustrated a droplet generator 1 having a nozzle 2 directing a column or stream 3 of ink toward a recording medium
4. It is possible to impart a localized disturbance to the column 3 such that a single droplet 5 breaks off earlier in the column than other droplets 6 surrounding that drop. The single droplet 5 is charged differently than the other droplet 6 enabling an encoding of information and non-synchronous ink jet operation.

According to this technique, all droplets 6 surrounding the special droplet 5 are charged while that special droplet 5 remains at a ground potential. The charged droplets 6 are then deflected to a gutter 7 while the single uncharged droplet 5 is used for printing. The single droplet 5 is grounded with the aid of a ground shield 8 positioned at the point of single droplet formation. The other droplets 6 receive a charge from a charge tunnel 9 located downstream from the grounded shield 8. Subsequent to the controlled charging and grounding, the droplets pass in the vicinity of a deflection electrode 10 which sets up an electric field causing the charged drop...