公开(公告)号：CA1098161A

公开(公告)日：1981-03-24

申请号：CA305225

申请日：1978-06-12

Applicant: IBM

Inventor： GIORDANO FRANCIS P ,  KUHN LAWRENCE ,  LANE RAMON ,  LEE CHEN-HSIUNG ,  ZIERDT GENE O

IPC: B41J2/02 ,  B41J2/025 ,  B41J3/04 ,  G01D15/18

Abstract: INK JET PRINTING HEAD An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.

公开(公告)号：FR2404530A1

公开(公告)日：1979-04-27

申请号：FR7824962

申请日：1978-08-21

Applicant: IBM

Inventor： GIORDANO FRANCIS P ,  KUHN LAWRENCE ,  LANE RAMON ,  LEE CHEN-HSIUNG ,  ZIERDT GENE O

IPC: B41J2/02 ,  B41J2/025 ,  B41J3/04

Abstract: An ink jet printing head comprising a head body made from a material having high specific stiffness and the head body includes an ink passage which is kept small to retain the high body stiffness. The ink passage comprises a narrow slot connected with internal holes in the body which lead to ink inlet and exit ports. A nozzle plate having a plurality of orifices is fixed to the front of the head body and a piezoelectric crystal is fixed to the back of the head body. The piezoelectric crystal is kept thin compared to the head thickness, typically on the order of 1/20 to 1/30 of the body thickness, so that the effect of the crystal on the resonant characteristics of the assembly is kept small. The ink jet head provides a plurality of columns or jets of ink which are excited in such a way as to break up into uniformly and equally spaced drops at a fixed distance from the nozzle plate containing the orifices which produce the jets.