Recorders – Record receiver deforming
Patent
1986-09-16
1987-12-22
Goldberg, E. A.
Recorders
Record receiver deforming
346140R, 2391022, 239600, 239690, G01D 1518, B05B 314
Patent
active
047149329
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a multi-nozzle ink projection writing device. More precisely, it concerns a modular unit consisting of a multiple ink jet printer. The ink jet printing technique consists of supplying a continuous jet of graded drops supplied by a modulations system and then electrostatically charging these drops by means of charging electrodes, and finally deflecting each drop by means of an electric field so that if the medium upon which it is desired to write and the writing device are in relative displacement, the formation of a printing matrix is obtained.
The problem becomes more complicated as soon as it is desired to have several jets working together, in particular for the purpose of increasing the number of lines. The particular aim of the present invention is to provide a device which enables this result to be obtained. It appears in the form of writing modules, each fitted with a nozzle. One of the major characteristics of the invention resides firstly in the simple and effective means for regulating the direction of each jet at the level of each nozzle and secondly, in the relative positioning means of the modules. All these performances are obtained with such a device according to the invention, the spatial requirement of which nevertheless remains extremely small.
More precisely, the invention concerns a multi-nozzle ink projection writing device, characterized in that each nozzle belongs to a module comprising a body supplied with an ink supply and drain outlet and working in conjunction with a gun which carries the ink piezoelectric excitation means and is equipped at its periphery with two sets of O-ring seals demarcating the ink feed chamber and the drain chamber so that the orientation of the jet in relation to the opening of the ejection nozzle is adjusted by rotation of the said chamber according to an angle which can vary from 0.degree. to 360.degree..
The invention will be more clearly understood from the explanations which follow and from the attached figures, i.e.:
FIG. 1 is a diagramatic illustration of a module conforming to the invention;
FIG. 2 is an exploded view illustrating a combination of the means according to the invention enabling the direction of the jet to be regulated;
FIG. 3 diagrammatically illustrates an example for the disposition of a large number of modules;
FIG. 4 is an example for the embodiment of a multi-nozzle writing device conforming to the invention.
For the sake of more clarity, the same elements bear the same references as regards all the figures.
As shown in FIG. 1, a basic element of a device according to the invention is made up of a modulation body 1 appearing in a modular form and is designed to work in conjunction with other identical modules 1 in order to enable different types of printing to be obtained; more numerous lines, overlapping of lines, variable spacing of lines, etc. Such a module 1 comprises an inlet 2 connected to the ink supply (not shown on the figure) and a drain outlet 3 of the ink circuit. This module 1 comprises a body 4 serving as a support for the gun 5 introduced into this body 4 and tightened by a tightening means 6, such as a screw, for example. A passage 10 is provided to receive a spindle (not shown here, but described by means of the figures following) around which the body 4 is able to rotate.
An exploded view of FIG. 2 illustrates the gun 5 designed to receive firstly the piezoelectric means 100 (transducer plus resonator) and secondly the nozzle-holder 12 plate 11, together with the imperviousness means provided by a packing box 13 and a seal 14, the nozzle-holder plate 11 being fitted to the extremity of the gun by an impervious coupling. This gun 5 comprises an ink feed orifice 15 and an outlet 16 for draining. Finally, according to a major characteristic of the invention, this gun is equipped at its periphery with grooves designed to receive a first and second set of O-ring seals (22 and 23), (24 and 25) respectively positioned upstream and downstream of each ink feed 15 and drain 16 orifice. This combin
REFERENCES:
patent: 4303928 (1981-12-01), Sugiyama et al.
patent: 4406405 (1983-09-01), Marichy
patent: 4538763 (1985-09-01), Perry et al.
patent: 4617574 (1986-10-01), Miller et al.
Goldberg E. A.
Imaje S.A.
Plottel Roland
Preston Gerald E.
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