DE2105373B2 - DEVICE FOR GENERATING A VISIBLE PRINTED IMAGE BY TRANSFERRING INK DROPS - Google Patents

Description

3 4

A major disadvantage is eliminated in this method with light, so that drops correspond to

as with the criticism of the previously mentioned light intensity on the recording media.

Described example, the elaborate design ger overstep. This tried and tested facility

Live parts, especially with this device for generating dot grids, however, is due to the

nor the arrangement and construction of electrosta- 5 multitude of capillary elements and those with the same

table-related components are added. Furthermore, the number of existing light guides is very expensive,

the disadvantage is the maintenance of a solid flow. The object of the invention is to provide a method for

sigkeitsleeveaus in the storage container, the additional generation of a print image and a device

Liehe ink control to create in the reservoir for its implementation, the

flowing ink requires one of the disadvantages of known designs listed above for writing

Wall-free characters, which are necessary for inkjet, must be removed.

depending on voltage, distance from the nozzle to the roller, this object is achieved according to the invention by the diameter of the exit cross-section, the viscous solution that the capillary-active agent consists of a hollow cylinder made from the ink and the surface tension of the porous material, ink, so that to achieve the goal of this and 15 whose outer surface cooperates with the surface of the previously described method expensive drawing carrier and that electrical devices are required. Another disadvantage of the one polarity with the lateral surface in the last mentioned method and the corresponding digem contact while an electrode device is to be seen in the fact that the characters and letters generated due to the opposite polarity in the healing space of the hollow cylinder method without Contact with the capillary-active Benicht are insignificantly greater than that which is conventionally arranged.
borrowed devices for writing and printing. The advantages achieved with the invention are in particular

In addition, a device has become known, particularly to see that for controlling the

in the case of the ink liquid under the influence of electrokinetic writing liquid, a relatively low one

Shear energy from the opening of one or more 25 voltages is applied to the electrodes, so that

juxtaposed capillary tubes from the necessary to carry out the process

occurs and transferred to a recording medium electrical components are dimensioned smaller

will. The openings of the tubes are arranged in rows. The size of the with the invention

direction, with this device on the Ab- device generated characters of printed images

printing of dot grids or lines corresponds to that of conventional devices for writing

restricts. practice and print.

Another advantage is the direct transmission of the

nungsgcrät is an arrangement for electrostatic ink on the recording medium, as the air gap

Recording of symbols has become known when between the opening of the capillary and the opening

a pen in permanent movement contact 35 drawing carrier of the device according to the invention

tion with the recording medium. The under- lying is kept so low mechanically that it is only too

Disruption of the flow of ink is caused by a high level of contact between the exiting

signal-controlled direct voltage between the colored writing fluid and the recording medium

substance-carrying pen and that comes into contact with it and there is no friction lock of the

running standing recording medium causes. 40 capillary effective medium can come. Use

Standard papers are used to form a symbol with high det.

DC voltage signals are worked because the suction effect, because the ink pod by reversing the polarity

Size of this signal, in particular from the resistance of the current at the electrodes in fractions of a second

depends on the recording medium. len flows in a different direction.

Another advantageous embodiment of the invention

A writing fluid jet working recording medium enables the application of the method in

device for writing lines, the copying technique. Here comes instead of the previous one

in the case of the electrophotographic image transfer input that is customary from individual statically charged tin

droplets formed beam a deflection device direction a device of the invention

passes through. A part of this with a basic signal 50 method for application.

applied droplets are produced by a Sam- Embodiments of the invention are in the

the container, which is shown with an electrical line drawing and will be described in the following

tend to be described as a deflection electrode formed porous ago. It shows

Cover plate is provided. For elimination over- F i g. 1 a liquid-filled capillary tube in

a suction device is required for waste ink.

borrowed. Fig. 2 is a diagrammatic representation of an

In addition, a device for recording management example is in a cut view and

of symbols known which, with the interposition of Fig. 3, a further illustration shown in section

of light-sensitive layers and static performance.

charge of this an adherence of polarized toner part- 60 The underlying idea of the invention

promotes or avoids chen at certain points. Process, electro-osmosis, is the subject of electrical

Furthermore, a method and a device is chemistry. Here, water is charged in a capillary

to copy a '. Originals published, in the case of the effective glass tube, positive towards the glass wall

the electrodes through the capillary medium on. Moves when an electrical voltage is applied

on the side and through the support of the recording medium, the water moves to the cathode, since the

gers, on the other hand, are formed. The surface-tric field is exerted on the ions by forces

tension that is transferred to the liquid at the outlet openings of the capillary friction. Rivers

clear pending ink menisci is caused by exposures with reversed polarization phenomena.

genes therefore move in the opposite direction. The ink has leaked out of the capillary,

now through appropriate test arrangements if the in the capillary pores of the

shown that the hollow cylinder occurring in the liquid polarized ink by the application of

The force of the current is directly proportional to the current impulses from the signal generator as a result.

are. According to the invention, the described forward displacement forces are moved. The ink just occurs

can be used in devices for generating in the areas of the electrodes from the capillary

with visible print images. A capillary effective effective part out. To avoid unintentional

Tube 1 in FIG. 1 contains an escape of ink from a reserve is the jacket surface 30

container 2 flowing writing liquid, which is liquid-repellent in the hollow cylinder 23

dor capillary, as described above, charges. Signed. When the hollow cylinder is rotated, the man-

This process is neriously due to the smallest circles with central area 30 and those in the area of the electrodes 31

positive and negative signs shown. If the leaked ink comes into contact with the recording

Applying a voltage to electrodes 3 and 4, tension carrier 33 and made an impression. the

if the liquid moves as a result of in the liquid electrodes 31 are greatly enlarged and only in principle

Speed occurring displacement forces to the electrode 4, 15 shown piell.

the device according to the invention has been stolen by a recording medium Outlet opening 6 to form a liquid-speaking arrangement in devices of the electrophotosity meniscus 7 is coming. Liquid graphics can be used here. Here they are through lightness transferred to the recording medium. adjustable electrostatic plates or rollers By reversing the polarity of the electrodes, a liquid is replaced by capillary active media, and in place keitsbewegung in the opposite direction than the device for the toner powder to be transferred indicated by the arrows 8, so that after printing, the flow connection with the capillary is stone Character on the recording medium 5 uses the current ink space.

Liquid added in even fractions of a millimeter - To create different shades of gray can be moved back and a blurring of the eras when printing z. B. Pictures it is required that the testified sign avoided by excess of liquid - to make drops of liquid different sizes, that will. The voltage that initiates the flow movement. One possibility of the invention is shown in FIG. 3. On supplies a signal source 9. The electrodes 3 and 4 of the lateral surface 34 of the porous hollow cylinder 35 is are coaxially assigned to the ends of the tube 1 and a photosensitive layer 36 is applied. Refer Boreholes for the flow of ink in 3 ° search with cadmium sulphide have the best results? go size the inside diameter of the pipe 1. shows. An electrically conductive grid 37 is on the Commercially available inks, which are also arranged and used with light-sensitive layer 36, are used an opposite polarization behavior than the ge as an electrode. The counter electrode 38 is located may have, that is, negative against- in the cavity 39 and is filled with ink Charge over the glass wall. 35 of two from the hollow cylinder 35 in a liquid-tight manner F i g. 2, a closing cap 40 made of porous material is held so that Hollow cylinder 23 rotatable in the directions of arrows 24 does not allow any contact with the capillary action device arranged. The hollow cylinder 23 comes with porous hollow cylinder 35 caps. The conductive grid 25 and 26 sealed liquid-tight. In the cap 37, like the electrode 38, with one is not pen holes 28 and 29 are connected to support a signal source 40 shown. By exposure electrode 27 provided. The ink supply from the device of the photosensitive layer 36 is this at a storage container, not shown, can do more with more or less high exposure levels bores, not shown, in one of the caps 25 or less electrically conductive, so that it is after and 26 or in the simultaneous application of a voltage to the electrodes as a wave Electrode 27 take place. On a surface line of the 45 different currents and thus too different-surface area 30 of the hollow cylinder 23 are dependent on displacement forces. As a result, was subject to The menu of the display corresponds to a point to be written with different displacement forces Electrodes 31 arranged in such a way that they are of different sizes against the ingress of ink. The exposure dei the outer surface by resilient light-sensitive surface, not shown, can be optically like Links are printed mechanically or electrically. 50, for example, in known methods of electrophotography according to the process described for FIG. 1 to take pictures of originals.

1 sheet of drawings

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Claims (6)

1 2 windeteil an ink pen with a Vorratsbe- Patent claims: holder is arranged movable to the recording direction, and a signal transmitter. The roller and the 1. Device for generating a visible ink pen also serve as electrodes. Print image on a recording medium 5 The ink pen contains a prior to writing by transferring ink droplets, which are caused by capillary-active part and a non-capillary-active tip produced by electrokinetic means, which is in constant contact with the recording migration of a carrier in a capillary medium . The ink creates a molten liquid and an ink menis recording medium is brought into contact with it in the capillary-active part, the surface tension of which is overcome by the onset of and with the liquid in contact with a corresponding control signal and a voltage potential is applied to it , so that the ink emerges from the opening which can be knocked and is assigned to the capillary region. The ink meniscus is formed after sub-electrodes, characterized in that the control signal is broken again. The capillary-active agent consists of a hollow cylinder (23, preferably 1000 ohms per centimeter and a 35) made from a recording medium with a resistance of porous material, its outer surface with the smooth, insulating surface. The spring of the ink surface of the recording medium (33) creates a pressure of at least effective, and the electrodes (31, 37) of the one position between the ink pen and recording clarity with the outer surface in constant contact are clocked with a gem or with hard metal, while an electrode (27, 38) corresponds tipped tip serves to limit the Kapillargegengesetzter polarity in the cavity of the cylinder effective to not the m with the recording medium without ^contact; t the capillary-in contact Part of the ink pen is arranged in such a way as to reduce the friction 2. Apparatus according to claim 1, characterized in that it is worn. indicates that the signal voltage applied to the jacket surface (30) reaches values of in constant contact electrodes (31) 1500 volts, which chipauf an appropriate insulation Assume one or more surface lines of the man-guiding parts. This high site area of the hollow cylinder (23) in one output tension is required, the surface chip stand in accordance with the raster density, to overcome an increase of the ink on the ink meniscus, writing point shift are arranged. the non-capillary part of the ink pen as well 3. Device according to / \ n:> pruch 1, thereby reducing the recording medium resistance, indicates that the jacket surface (30) of the from The is constantly under contact pressure. Mitakt Porous material made hollow cylinder of the ink pen with the recording medium (23) is impregnated to repel liquids. 35 requires a hard tip of the ink pen. in the 4. Apparatus according to claim 1, characterized in that it is necessary to identify the ink pen of the to adjust that on the outer surface (34) of the teren again. Another disadvantage is that capillary active medium a porous, light-use of not commercially available recording-sensitive Layer (36) is arranged, the voltage carriers, as well as the aforementioned electrical conductivity is light dependent. 40 disadvantages of an inherently expensive process in 5. The device according to claim 4, thereby creating, using and maintaining
indicates that the photosensitive layer is also made of cadmium sulfide. tung became known to write about 6. Device according to one of the preceding characters and letters from electrically charged Claims, characterized in that serve on 45 NEN particles existing beam, which in or in the one with a porous, light-sensitive open air at a distance of centimeters from the Layer (36) provided effective surface recording medium is formed and removed from of the capillary-active medium one or more an electric field controlled on the recorder electrically conductive grid (37) attached voltage carrier surface impinges. The device for are. 50 Implementation of this procedure consists essentially made of a body made of insulating material per, which carries a pipe for liquid supply, whose one end facing away from the recording medium side is connected to a liquid container The invention relates to a device for generating the other against the surface to be inscribed of a visible printed image is designed as a mouth on a surface directed end, drawing carrier by transferring ink droplets so that the exiting jet of four under compress, the deflection electrodes caused by electrokinetic voltage generated Migration one is flowable in a capillary agent. in the liquid and with the 60 The pipe mentioned is capillary, whereby drawing carriers are brought into contact, and the level of the liquid in the liquid container standing in contact with the liquid and causing a liquid meniscus in the capillary a voltage potential can be applied to the larrohr must be set to a fixed value. Electrodes assigned to the capillary region. One for the recording of the recording medium It is a device for recording electrical internal rollers, as well as the capillary tube form elec- formations known, with one being trodden by a motor with a potential difference of 4000 volts, driven recording medium roller, one of the same while voltages on the deflection electrodes The spindle is driven by a small motor and 1700 volts are applied to it.