Planar ink-jet print head in a dual in-line package

Details Planar ink-jet print head in a dual in-line package Planar ink-jet print head in a dual in-line package

1989-10-10

1990-10-16

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41H 2045

Patent

active

049638971

DESCRIPTION:

BRIEF SUMMARY
The invention relates to an ink-jet print head for an ink-jet printing machine, having a sandwich ink-jet head composed of individual superjacently arranged plates which accommodate ink ducts, drive elements, pressure chambers and the like, and which are rigidly connected to one another, and having an ink inlet orifice for the supply of the printing fluid.
Ink-jet printing devices with drive elements driven piezoelectrically or via heating elements are generally know and have been used successfully. For instance FR-A-2 518 901 discloses a multilayer-type ink-jet print head which is of sandwich construction and consists of a plurality of superjacently arranged plates which are rigidly connected to one another. The ink-jet print head furthermore has an ink-jet inlet orifice for the supply of the printing fluid.
It is also known from Patent Abstracts of Japan, Volume 10, No.55 (M-458)(2112), March 5, 1986 and JP-A-60 204 345 to arrange an ink-jet print head in a plug-in package with connecting leads. In this arrangement the ink-jet print head is plugged onto an ink reservoir and connected to the ink reservoir via a connecting piece.
In order to balance the ink-jet print head, it is customary to assign an electric balancing element to each drive element, it being possible for said balancing element to be designed as a resistor which can be balanced using a laser. In the ink-jet print head known from US-A-4 381 515, there are arranged on a chip balancing elements for a network preventing cross-talk of the drive elements which is balanced before being fitted into the actual ink-jet print head.
The object of the invention is to design an ink-jet print head of the type mentioned at the beginning in such a way that on the one hand it can be produced in a simple manner and on the other hand it is possible to mount it easily in the ink-jet printing device.
This object is achieved by an ink-jet print head of the type mentioned at the beginning in accordance with the features of the first patent claim.
Advantageous embodiments of the invention are disclosed in the subclaims.
The ink-jet print head consists of a sandwich ink-jet head composed of individual superjacently arranged plates which accommodate ink ducts, drive elements with piezoelectric elements or electrothermal transducers, pressure chambers and the like, and which are rigidly connected to one another, the sandwich ink-jet head being arranged in a plug-in package with connecting leads. An opening in the plug-in package provides access to the sandwich ink-jet head in order to be able to electrically balance and contact the sandwich ink-jet head.
After balancing, said contacting and balancing opening is sealed so as to be tight with respect to ink. In addition, the ink-jet print head has an ink inlet opening for the supply of printing fluid.
An ink-jet print head constructed in this manner can be produced automatically, and moreover permits the print head to be arranged in a corresponding socket or solder mounting via the connecting leads of the plug-in package, which permits simple exchange of the print head during servicing.
In an advantageous embodiment of the invention, an electric balancing element is assigned in each drive element of the sandwich ink-jet head, the balancing element consisting of resistors which can be balanced by a laser and which are arranged in the sandwich ink-jet head integrated on a plate. In addition, the sandwich ink-jet head may have elements for ink heating.
Since the required balancing resistors are arranged on the sandwich ink-jet head and can be balanced automatically using a laser, no further balancing of the ink-jet printing head is necessary by means of a separate balancing module.
The ink-jet print head itself is constructed here so that it has the necessary stability to accommodate any cleaning and sealing stations which may be arranged in front of the print head.
Strips arranged laterally on the plug-in package and projecting beyond the plug-in package, prevent the connecting leads being dirtied by ink, and in addition

REFERENCES:
patent: 4381515 (1983-04-01), Bain
patent: 4611219 (1986-09-01), Sugitani et al.
patent: 4635080 (1987-01-01), Watanabe
patent: 4695854 (1987-09-01), Cruz-Uribe

Affiliated with

Also associated with

Rating

Planar ink-jet print head in a dual in-line package does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Planar ink-jet print head in a dual in-line package, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planar ink-jet print head in a dual in-line package will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-852562