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Ink Jet Printer Using Drop Collision Modulation

IP.com Disclosure Number: IPCOM000083820D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Lane, R: AUTHOR [+2]

Abstract

This is an Ink jet printing system comprising a pair, or an array of pairs, of ink jets that are controlled to collide or to pass one another, by adjusting the relative phases of the ink jets constituting a given pair. Independent control of jet pairs in the instance of arrays is implemented by using electrohydrodynamic drop synchronization.

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Ink Jet Printer Using Drop Collision Modulation

This is an Ink jet printing system comprising a pair, or an array of pairs, of ink jets that are controlled to collide or to pass one another, by adjusting the relative phases of the ink jets constituting a given pair. Independent control of jet pairs in the instance of arrays is implemented by using electrohydrodynamic drop synchronization.

For printing purposes, the relative phase of the streams may be adjusted such that the respective streams do not collide, with one stream striking a printing medium and the other stream being guttered. Alternatively, the other stream could strike a second printing medium for providing a copy. If on the other hand it is not desired to print, the relative phase of the streams may be adjusted such that the streams collide, and the resultant collided stream is guttered. Conversely, noncollided streams could be guttered and the collided stream could be used for printing.

One arrangement of a pair of ink jets for constituting an ink jet printing system is shown in the figure. An ink jet head 2 is placed at right angles with respect to an ink jet head 4. Head 2 is driven at a fixed frequency F by a driver 6, and head 4 is driven at fixed frequency F by a modulator-driver 8 which can vary the phase of the drive signal and, accordingly, the phase of the droplet stream being emitted by head 4 with respect to head 2.

Assume the phase is adjusted for printing, such that the droplets 10 and...