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Stream Alignment, Aspirated Ink Jet Printer

IP.com Disclosure Number: IPCOM000052580D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Campbell, AS: AUTHOR [+3]

Abstract

The path that an ink jet stream takes through an aspirator is critical, because if the stream is not centered in the aspirator, it will experience aerodynamic forces which tend to "blow' it off course when the air is turned on. An aspirated ink jet head utilizing independent rotational and translational means for aligning the stream with a desired path in the aspirator is shown schematically above.

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Stream Alignment, Aspirated Ink Jet Printer

The path that an ink jet stream takes through an aspirator is critical, because if the stream is not centered in the aspirator, it will experience aerodynamic forces which tend to "blow' it off course when the air is turned on. An aspirated ink jet head utilizing independent rotational and translational means for aligning the stream with a desired path in the aspirator is shown schematically above.

Referring to Fig. 1, the charge electrode 10 is located in a protrusion 11 of a socket 12, the protrusion 11 housing an ink jet head 13 having a conventional nozzle 14 for emitting ink through the charge electrode 10. The socket 12 preferably includes an internal spherical surface 14 which is adapted to mate with an external spherical surface 15 (Fig. 2) in the body portion of the aspirator.

The body portion of the aspirator includes an opening 16 which permits ink stream passage through the opening and into a tunnel 17 through which the ink and air pass. Although not shown in the drawing, the tunnel 17 includes conventional charge electrodes for effecting ink drop stream deflection depending upon the charge placed upon the ink drops by the charge electrode
10.

The spherical surface 15 on the aspirator body is adapted for co-active alignment with the spherical surface 14 of the socket 12 to form a ball and socket joint. Preferably, the spherical surfaces 14 and 15 are located such that the center of the radius of the sphere i...