Browse Prior Art Database

Two Dimensional Ink Jet Misdirection Sensor

IP.com Disclosure Number: IPCOM000051725D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Abbott, TD: AUTHOR [+4]

Abstract

This article describes an apparatus and method for measuring in-plane and out-of-plane misdirections of streams in an ink jet printer. The system includes a drop sensor which is a straight conductor mounted perpendicular to the jet stream's direction. The other sensor called the misdirection sensor is similar to the drop sensor except that it is positioned at an angle to a line perpendicular to the jet streams. The sensors are placed on opposite sides of the jet streams in planes equidistant from the plane of the jet streams.

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Two Dimensional Ink Jet Misdirection Sensor

This article describes an apparatus and method for measuring in-plane and out-of-plane misdirections of streams in an ink jet printer. The system includes a drop sensor which is a straight conductor mounted perpendicular to the jet stream's direction. The other sensor called the misdirection sensor is similar to the drop sensor except that it is positioned at an angle to a line perpendicular to the jet streams. The sensors are placed on opposite sides of the jet streams in planes equidistant from the plane of the jet streams.

Turning to the above figure, the drop sensor is positioned perpendicular to the droplet streams emanating from the drop generator. The misdirection sensors are segmented and are mounted at an angle relative to the drop sensor. The misdirection sensor is in a plane parallel to the plane of the streams and on the opposite side of the streams from the drop sensor.

The sensor system operates in two modes: one to sense in-plane misdirections and the other to sense out-of-plane misdirections. The in-plane mode is based on the time ink droplets cross the two sensors. Since the misdirection sensor is mounted on an angle, any drop that is misdirected in the plane of the streams will cross it at a time different than normal (earlier on one side, later on the other side of the nominal position). The time for the same drop to cross a drop sensor would be essentially the same as it would have been if it had not...