Browse Prior Art Database

Ink Jet Gutter

IP.com Disclosure Number: IPCOM000086423D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Harvey, FC: AUTHOR [+2]

Abstract

In certain types of ink jet printers, unused ink drops are prevented from depositing on a print medium by directing them to a gutter. When the unused drops strike the gutter, splatter occurs which can produce misting. Some systems use vacuum return lines which remove all the air and liquid carried by the jet. However, vacuum systems cause high-evaporation rates which affect ink properties.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Ink Jet Gutter

In certain types of ink jet printers, unused ink drops are prevented from depositing on a print medium by directing them to a gutter. When the unused drops strike the gutter, splatter occurs which can produce misting. Some systems use vacuum return lines which remove all the air and liquid carried by the jet. However, vacuum systems cause high-evaporation rates which affect ink properties.

The acute angle design of gutter 10 solves the mist problem without a vacuum by retrapping mist drops in the flowing liquid ink within the gutter, and by preventing fracture pieces of the impacting drops from leaving the body of the liquid.

Acute angle 11 is preferably in the neighborhood of 25 degrees although the angle may be as large as 40 degrees or more. Surface 12 must be curved. A sharp bend would not work. The inside radius of surface 12 at the apex is approx. 0.020 inch. Mist generation is essentially eliminated when unused drops 14 are caused to impact within target area 13, which is 0.025 inch wide and Approx. approx. 0.020 inch from curved surface 12. Outside of this range, misting may occur due to significant changes in liquid momentum.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]