Browse Prior Art Database

Ink Jet Printer

IP.com Disclosure Number: IPCOM000077559D
Original Publication Date: 1972-Aug-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

McDonnell, JA: AUTHOR

Abstract

An oil can type nozzle 10, having an ink supply line 11, produces drops of ink at the tip of the nozzle in response to pulsations produced in a generally conical cavity, by a piezoelectric crystal or the like.

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Ink Jet Printer

An oil can type nozzle 10, having an ink supply line 11, produces drops of ink at the tip of the nozzle in response to pulsations produced in a generally conical cavity, by a piezoelectric crystal or the like.

Horizontal deflection plates 12 and 14 are provided together with vertical deflection plates 16 and 18. All the plates are charged by a source 20 to a potential necessary to accelerate a drop to the required velocity. A differential voltage is applied horizontally by sources 22 and 24, and vertically by sources 26 and 28 to deflect the drop.

Since the drop leaves the nozzle at close to zero velocity, it is accelerated in the direction of the gradient of the field, and hence, rather than being "deflected" it is "aimed" down the desired path from the outset. The paper 30 must be positioned close to the electrode structure, as the drop decelerates as it recedes from the electrode area.

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