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Multinozzle Line Printer Using Electromagnetic Valving

IP.com Disclosure Number: IPCOM000079469D
Original Publication Date: 1973-Jul-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Hochberg, F: AUTHOR [+2]

Abstract

In Figs. 1A and 1B, a line printer consists of a single line of fixed nozzles N (one for each ink drop position) across the entire paper width. All nozzles can be addressed simultaneously to write (or not) at a given time. Paper motion is along the length of the paper and continuous during writing. Control of the ink drops from a nozzle N is provided by activating a deflector element. D1,D2,D3,... covering each nozzle N to prevent writing, or displaced as is D2 aside of the nozzle N to permit writing. This is accomplished by placing the element D in a magnetic field so when current passes through element D, the force due to the magnetic field deflects element D away from the nozzle N.

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Multinozzle Line Printer Using Electromagnetic Valving

In Figs. 1A and 1B, a line printer consists of a single line of fixed nozzles N (one for each ink drop position) across the entire paper width. All nozzles can be addressed simultaneously to write (or not) at a given time. Paper motion is along the length of the paper and continuous during writing. Control of the ink drops from a nozzle N is provided by activating a deflector element. D1,D2,D3,... covering each nozzle N to prevent writing, or displaced as is D2 aside of the nozzle N to permit writing. This is accomplished by placing the element D in a magnetic field so when current passes through element D, the force due to the magnetic field deflects element D away from the nozzle N.

A transducer T, driven at a fixed periodic rate generates drops of ink through all nozzles N simultaneously. A DC magnetic field is provided by a solenoid or permanent magnet. The appropriate elements D are addressed to provide ink where desired. The drive requirements can be met with low-voltage integrated circuits. In operation, the elements D are addressed in synchronism with the transducer T writing a line of dots at a time. Deflected ink is collected and recycled.

In Figs. 2A and 2B ink is delivered on demand only, and no recycling or separate transducer is required. Elements D1-D4, etc. are in the ink supply and serve to deliver ink at the appropriate time and act as a shut off valve. This is accomplished by pulsing the el...