JPH0124635B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recording method that allows printing correction,
More specifically, the present invention relates to a printing correction method for rendering characters, symbols, etc. erroneously printed by an inkjet printer colorless.

In recent years, matrix printers such as ink jet printers and wire dot printers have become a large market due to their various advantages, such as greatly improved freedom in character type selection, improved print quality through fine patterning, and increased printing speed. is expected.

However, to correct printed parts using this type of dot matrix printer, you can use a sand eraser to scratch out the area you want to correct, apply white correction paint again with a brush, or paste a small piece of correction material. All of these processes, such as covering the corrected areas with paper, are done manually or by a similar method, and despite the improvement in printing speed, the correction efficiency is extremely poor.

On the other hand, ordinary type impact format printers use a so-called correction ribbon format.
A method has also been adopted in which a correction ribbon is automatically applied to the correction area and the ink adhering to the paper is transferred to the correction ribbon by overprinting the same type of characters as the printed characters, and then physically peeled off.
Similarly, a method has also been adopted in which a small piece for correction is automatically attached to the corrected area.

However, if such a system is adopted, small pieces for correction, correction ribbon supply means, storage means, etc. are required, which inevitably results in an increase in size and weight of the entire apparatus.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording method which is small and lightweight, and which has extremely high correction efficiency and can make erroneously printed characters, symbols, etc. colorless.

In order to achieve the above object, the present invention uses a recording jet nozzle to jet an ink that is used for recording on a printing medium and that can be made colorless through a chemical reaction. A recording method for recording, wherein a correction liquid that chemically reacts with the ink to make the ink colorless is sprayed onto the recording to be corrected using a correction spray nozzle to cause the chemical reaction. A configuration in which a recording is made colorless, and a common control device performs recording by the recording jet nozzle and correction of the recording by the correction jet nozzle to achieve a one-to-one correspondence between the recording to be corrected and the correction liquid. It was adopted.

FIG. 1 is a schematic diagram illustrating an embodiment of the present invention, and shows an example in which an inkjet printer is used as the printer.

In the figure, reference numeral 1 indicates two parallel guide rods suspended between the frames of the printer, and a carriage 2 is slidably mounted between these guide rods 1. The reference numeral 3 is a motor, and a timing pulley 4 for driving a carriage is fixed to its output shaft.An idler timing pulley 5 is rotatably attached to the timing pulley 4 apart from the timing pulley 4. A timing belt 6 is stretched. The carriage 2 is fixed to the timing belt 6 by a fixing means 7 such as a screw.

A printing ink jet nozzle 8 is fixed to the carriage 2 by suitable fixing means, and the jet nozzle 8 is connected via a flexible pipe 9 to an ink tank 10 provided at a fixed part of the apparatus. An ejection control means 11 is provided at the base of the ink ejection nozzle 8, and this ejection control means 11 is connected to a flexible control cable 12.
It is connected to the control device 13 via.

On the other hand, along with the ink jet nozzle 8 and spaced apart from it by a predetermined distance l, there is a correction liquid jet nozzle 14.
is fixed to carriage 2. The correction liquid supplied to the correction liquid injection nozzle 14 is a liquid that chemically makes the ink colorless. The correction liquid injection nozzle 14 is connected to a correction liquid tank 16 via a flexible pipe 15.

An injection control means 17 is provided at the base of the correction liquid injection nozzle 14 and is connected to the control device 13 via a flexible control cable 12. Further, the control device 13 and the motor 3 are connected by a control cable 18, and the rotation of the motor 3 is controlled.

A printing paper 20 is arranged in front of the carriage 2 and at a predetermined distance from the tips of the ink and correction liquid injection nozzles 8 and 14, and this printing paper 20 is attached to and guided by a platen (not shown). and is moved in a direction perpendicular to the plane of the paper of FIG.

Next, the operation of this embodiment configured as above will be explained.

First, when a printing command is transmitted from the control device 13 via the control cable 12 to the control means 11 of the ink ejection nozzle 8, the printing ink 19 is appropriately controlled and ejected from the tip of the ejection nozzle 8 onto the printing paper 20. A dot 19a is formed on the top.

At the same time, a print command from the control device 13 is input to the motor 3 via the control cable 18, the motor 3 is rotated, and the ink jet nozzle 8 is sequentially sent in the direction of the arrow so that the ink jet nozzle 8 can correspond to the next print dot position. Dot matrix printing is performed.

When it becomes necessary to correct some of the characters, symbols, etc. printed as described above, a correction command is input to the control device 13, and the dot positions to be corrected or positions in one-to-one correspondence with the characters, symbols, etc. the printing paper 20 so that the correction liquid injection nozzle 14 corresponds to
The paper feeding mechanism, motor 3, etc. of A chemical change occurs during this process, making the ink colorless.

Further, the area to which the correction liquid film 21a is applied may be only one dot.

On the other hand, various combinations of the correction liquid 21 and the control means 17 for its injection nozzle are conceivable;
The correction paint 2 may contain a magnetic material and the magnetic material may be electromagnetically controlled by the control means 17.
As the first injection control means, a pump using electromagnetic force or piezoelectricity may be used.

Alternatively, the correction fluid tank 16 containing the correction fluid 21 together with compressed gas may be combined with a control means 17 using an electromagnetic valve or the like for control.

By the way, since the correction liquid injection nozzle 14 is arranged at a distance l in the line direction from the ink injection nozzle 8, it is configured so as not to interfere with visual confirmation of printed characters. Further, it is desirable that this distance l be set to an integral multiple of the dot matrix pitch.

FIG. 2 illustrates a state in which dots 19a printed on printing paper 20 are covered with a film 21a of correction fluid.
9a is covered with a coating 21a, and FIG. 2b shows a coating 21a with a plurality of dots 19a continuous.
Any specific correction method may be used to indicate the covered state, and the coating 2
While covered with 1a, a chemical reaction occurs between the ink and the correction liquid, making the ink colorless.

By the way, FIG. 3 explains an example of a correction liquid injection nozzle unit, and in this embodiment, a specific example of a structure in which correction liquid 21 is injected by compressed gas through an electromagnetic valve is shown. It shows.

That is, the electromagnetic correction nozzle unit 22 provided at the tip of the flexible pipe 15 has a nozzle 23 at its tip, and within this nozzle 23 is a nozzle chamber 24 communicating with the flexible pipe 15.
is formed. A plunger 25 is slidably disposed in the nozzle chamber 24, and a plunger tip 25 is formed at the tip of the plunger 25.
a is fitted into the opening of the nozzle 23 in a slidable and airtight manner. The rear end of the plunger 25 extends outward from the rear end of the electromagnetic correction nozzle unit 22 and is provided with a knob 25b, and the free end of a return spring 26 is pressed against the outside of this knob 25b. The base end of the return spring 26 is fixed to the rear end of the electromagnetic correction nozzle unit 22.
A force is exerted on the plunger 25 so as to constantly close the opening of the nozzle 23. Further, an electromagnetic winding 28 is wound around the yoke 27 around the plunger 25, and by energizing the electromagnetic winding 28, the plunger 25 is moved back and the opening of the nozzle 23 is opened. The configuration is such that the correction liquid 21 is injected by gas pressure.

If the above structure is adopted, the plunger 25
The plunger tip 25a is the tip of the nozzle 2.
3, and because it slides through the opening during operation, it also serves as a cleaner for this opening and also has the function of preventing the correction fluid from clogging.

If a quick-drying ink erasing liquid or the like is used as the correction liquid 21, it tends to dry at the tip of the injection nozzle 14 and cause clogging.

Therefore, in order to prevent clogging due to drying of the correction liquid when not in use, it is preferable to provide a clogging prevention cap as shown in FIGS. 4 and 5.

In the example shown in FIG. 4, a cap 29 is fitted to the tip of the correction fluid injection nozzle 14.
The cap 29 has a projection 29a that fits into the opening of the nozzle 14. Therefore, as long as the protrusion 29a is fitted into the open end of the nozzle 14, the correction liquid 21
does not reach this part, and the correction liquid can be kept in a state in which the opening end of the nozzle 14 does not dry.

The example shown in FIG. 5 shows a cap 30 fitted on the outside of the tip of the correction fluid injection nozzle 14, and a solvent-impregnated member 31 impregnated with the solvent of the correction fluid 21 is provided at the bottom of the cap 30. be. If such a structure is adopted, the correction fluid 21 will be delivered to the injection nozzle 14.
Since the tip of the correction fluid 21 is always in contact with the solvent-impregnated member 31, defects such as clogging caused by drying of the correction fluid 21 are eliminated.

In the example shown in FIGS. 4 and 5, the caps 29 and 30 are simply fitted onto the tip of the injection nozzle 14 and are manually attached and detached during use. For example, a solenoid or the like may be used so that it can be attached or detached in response to a correction command.

On the other hand, it is also possible to provide a solvent supply device to the solvent-impregnated member 31 so that the solvent is always replenished as the solvent is consumed.

On the other hand, what is shown in FIG. 6 is for explaining a structure in which a correction liquid is sprayed using a masking means as a reference technique for the present invention. An opening 32 is located at a position corresponding to the tip of the nozzle.
If such a masking means 32 is provided, the correction liquid sprayed from the tip of the nozzle will be able to detect, for example, the central character among the adjacently printed characters 33 to 35. The correction liquid 21 can be applied only to 34. The masking means 32 prevents the excess correction liquid from reaching the printing paper 20 side and allows the correction liquid to be applied only to a predetermined position.

By the way, the composite liquid of the printing ink and the correction liquid, which has been sprayed with the correction liquid 21 to cause a chemical reaction and become colorless, requires extra time to wait for natural drying. However, in reality, printing must be continued continuously and there is no time to wait for it to dry naturally. That is, in order to print again on the corrected area, it is necessary to immediately remove this synthetic liquid.

Therefore, in the present invention, as shown in FIG. 7, the carriage 2 is provided with a roller 36 for absorbing the waste liquid.

This suction roller 36 is rotatably supported via a pin 38 on one end of a rotary lever 37 which is bent into an L-shape.
is rotatably supported on the carriage 2 via a pin 39 at its bent portion. The bent portion of the rotating lever on the side where the suction roller 36 is not attached is a bent portion 40 bent upward.
This bent portion 40 serves as an armature and faces the pole piece 42 of the electromagnet 41. An electromagnetic winding 43 is wound around the pole piece 42, and when it is energized, the pole piece 42 is excited and attracts the bent portion 40, which is an armature.

In addition, a pin 44 protruding from the vicinity of the suction roller 36 of the rotating lever 37 and from the side of the carriage 2 is provided.
A spring 45 is stretched between the lever 37 and the rotary lever 37 to allow the rotary lever 37 to rotate clockwise around the pin 39 in FIG. Therefore, when the electromagnetic winding 43 is not energized, the suction roller 36 is separated from the printing paper 20 due to the tensile force of the spring 45.

The carriage 2 has a suction roller 36 like this.
After the correction liquid is injected from the correction liquid injection nozzle 14, the carriage 2 receives a signal from the control device 13 in the direction of the corrected character.
The bending portion 4 is moved in the direction shown by the arrow in FIG.
0 is attracted to the pole piece 42, the rotary lever 37 is rotated counterclockwise in FIG. 7, and the suction roller 36 rotates in contact with the printing paper 20, and immediately absorbs the waste liquid. If the current to the electromagnetic winding 43 is cut off after the suction roller 36 has passed the corrected location, the suction roller 36 will return to its original state due to the tensile force of the spring 45.

All of the above operations can be performed automatically by sending preprogrammed commands to the control device 13.

Note that the absorbing roller 36 may be made of porous elastic synthetic rubber, synthetic resin, or the like, or may have a structure in which a highly absorbent material such as ink absorbing paper is wrapped around an ordinary roller. Further, the absorbing roller need not be a roller but may be a pad-shaped roller having a absorbing function or a type that shortens the drying time by using a superheated blower or the like.

As is clear from the above description, in the present invention,
A correction liquid that chemically reacts with the ink to make the ink colorless is sprayed onto the recording to be corrected using a correction jet nozzle to make the recording colorless, and a common control device is used to spray the correction liquid onto the recording to be corrected. Corrections can be made reliably and without any inconvenience by simply matching the correction ink one-to-one, so the configuration is simple and does not disturb other records. Also, there is no need to attach extra correction material to the printing medium, and it is possible to make corrections after correction. This has the advantage of not disturbing the records. In addition, unnecessary liquid is immediately removed from the printing paper by the suction roller, so
Reprinting the corrected area can be done in a short time.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram illustrating an embodiment of the present invention, FIGS. 2a and 2b are partially enlarged cross-sectional views of printing paper illustrating the state in which correction liquid is attached, and FIG.
The figure is a cross-sectional plan view of an example of an electromagnetic correction nozzle unit, and FIGS. 4 and 5 are partially enlarged sectional views illustrating different examples of anti-clogging caps.
FIG. 6 is a perspective view explaining the masking means, and FIG.
The figure is a plan view illustrating the attachment structure of the suction roller. 1... Guide rod, 2... Carriage, 6...
Timing belt, 8...Printing ink injection nozzle, 13...Control device, 14...Correction liquid injection nozzle, 20...Printing paper, 21...Correction liquid, 29,
30...Clogging prevention cap, 36...Sucking roller, 37...Rotating lever, 41...Electromagnet, 45...Spring.

Claims (1)

[Scope of Claims] 1. A recording method in which an ink used for recording on a printing medium, which can be made colorless through a chemical reaction, is jetted from a recording jet nozzle. A correction liquid that chemically reacts with the ink to make the ink colorless is sprayed onto the record to be corrected using a correction spray nozzle to cause the chemical reaction and make the record colorless. , a recording method characterized in that recording by the recording jet nozzle and correction of the recording by the correction jet nozzle are performed by a common control device to achieve a one-to-one correspondence between the recording to be corrected and the correction liquid. .