Browse Prior Art Database

Ink Jet Gutter

IP.com Disclosure Number: IPCOM000086863D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Hungarter, E: AUTHOR [+5]

Abstract

An ink jet gutter can be laminated from a plurality of layers to incorporate aiming and phase-sensing detectors.

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Ink Jet Gutter

An ink jet gutter can be laminated from a plurality of layers to incorporate aiming and phase-sensing detectors.

Referring to Fig. 1, laminae of insulating material, such as a polymer or ceramic, are shaped, as illustrated, for layers 1 through 7. Each layer has an opening 8-14 therethrough for passage of a stream of ink droplets. Layers 2, 4 and 6 each have respective channels 15, 16 and 17 through which ink, accumulating in the proximity of the opening, is withdrawn by common vacuum applied through aligned holes 18 in each of the first six layers.

The underside of layer 3 has a printed-circuit common 19 which forms one electrode above channel 16 of layer 4, and layer 5 has printed circuit 20 which forms the second electrode below the channel. Plated thru-hole 21 connects circuit 19 with thru-hole 22 in layer 5 and circuit 23 which forms the upper electrode for channel 17 in layer 6. Layer 7 has printed circuit 24 which forms the bottom electrode for channel 17. The several printed-circuit electrodes are connected via aligned plated thru-holes 25, 26 or 27, near the left end of the individual layers.

In Fig. 2, it will be seen that undeflected drops in a stream will impact the upper surface of layer 7 and will be withdrawn along channel 17 past sensor circuits 23 and 24. The ink will short out the two sensors to complete a circuit and produce a detectable signal indicating the presence of the jet on layer 6. For determining the proper phasing of c...