Browse Prior Art Database

Ink Jet Head

IP.com Disclosure Number: IPCOM000088622D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Pelkie, RE: AUTHOR [+2]

Abstract

It is technically difficult to construct closely spaced ink jet nozzles. If one desires to have an ink jet head which places drops on a paper more closely spaced than one can fabricate ink jet nozzles, one can utilize multiple rows of staggered nozzles as shown in Fig. 1. With the structure shown in Fig. 1, the ink drops emerging from the nozzles in Row A fall in between the ink drops emerging from the nozzles in Row B.

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 84% of the total text.

Page 1 of 2

Ink Jet Head

It is technically difficult to construct closely spaced ink jet nozzles. If one desires to have an ink jet head which places drops on a paper more closely spaced than one can fabricate ink jet nozzles, one can utilize multiple rows of staggered nozzles as shown in Fig. 1. With the structure shown in Fig. 1, the ink drops emerging from the nozzles in Row A fall in between the ink drops emerging from the nozzles in Row B.

If a head, such as shown in Fig. 1, is moved across a page, in the direction indicated by the arrow C, and if one desires to print a vertical line, one would first emit a series of drops from the nozzles in Row A, and at a slightly later time, one would emit a series of drops from the nozzles in Row B. The time differential between the drops coming from Row A and the drops coming from Row B would be established so that the drops from both rows of nozzles would hit the paper along the same line. Relatively complicated and expensive electronics are required to control the timing of drops to insure proper registration. For clarity of illustration in Fig. 1, the locations where drops from nozzles A hit the paper are shown solid and the locations where drops from nozzles B hit the paper are shown dotted.

The complexity and amount of electronics needed can be minimized by utilizing a head configuration such as that shown in Fig. 2. In this head, the two rows of nozzles are angularly positioned so that if one desires to print a vertical line...