JP3222910B2 - Liquid flight recording method and liquid flight recording apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording on a recording medium by forming dots by depositing a recording liquid flying as droplets on the recording medium and forming a recording medium on the recording medium. The present invention relates to a liquid flight recording method and a liquid flight recording apparatus for performing recording by switching a recording mode between a case where recording is performed on a body and a case where recording is performed on a slow drying recording medium.

[0002]

2. Description of the Related Art Conventionally, a liquid flying recording method includes various methods of flying a recording liquid (ink), for example, an electrostatic suction method, a method of applying mechanical vibration or displacement to ink using a piezoelectric element, Ink is generated by heating and bubbling the ink and utilizing the pressure, etc., to generate and fly ink droplets, and to perform recording by attaching some or all of them to a recording medium such as paper. It has attracted attention as a recording method that generates less noise and can perform high-speed printing and multicolor printing.

As the ink used in the liquid flight recording method, an ink containing water as a main component is used from the viewpoint of safety and recording characteristics, and further, clogging prevention and jetting of a jet nozzle of a liquid flight recording apparatus. In many cases, a polyhydric alcohol or the like is added to improve stability.

[0004] Next, as a recording medium used in the liquid flight recording method, a recording medium in which a porous ink receiving layer is provided on a substrate conventionally referred to as ordinary paper or ink jet recording paper. Is used.

Conventionally, images formed by the liquid flight recording method have been used exclusively for observing surface images. However, with the improvement and spread of the performance of liquid flight recording apparatuses, applications other than those for observing surface images have been developed. There is a demand for a recording medium that is suitable for recording.

[0006] Applications of the recording medium other than those for observing surface images include those used for projecting recorded images onto a screen or the like by using an optical device such as a slide or an OHP to observe those images, and those for color printing. Examples include a color analysis plate for producing a positive plate, a CMF (color mosaic filter) used for a color display such as a liquid crystal display, and the like.

[0007] In general, in the liquid flight recording method, ink that is difficult to dry is used in order to prevent clogging of the jet nozzle, and the component of this ink is generally one in which a binder, a dye, an additive, and the like are dissolved in water. It is. Therefore, when performing recording with a liquid flight recording apparatus, the recording medium needs to have water absorbency. In general, when performing high-quality recording, special recording is performed in order to impart sufficient and instantaneous absorption of ink. Designed paper is used.

On the other hand, with the colorization of the liquid flight recording apparatus, there is an increasing demand for recording on a transparent recording medium and using it as an OHP recording sheet. However, a transparent recording medium is usually made of a plastic film, but since the plastic film is hydrophobic and does not absorb ink at all, the ink directly recorded thereon does not easily dry and is adjacent to each other. There is a problem in that the meniscus-shaped ink dots come into contact with each other to disturb the image, and a clear image cannot be obtained. In order to solve such a problem, for example, improvements have been made in terms of the material of the recording medium, such as the invention disclosed in JP-A-62-204990 and JP-A-62-231788. Have been done.

However, the improvement of the recording medium from the viewpoint of the material has not realized a material which can sufficiently withstand practical use. For example, as disclosed in Japanese Patent Application Laid-Open No. 62-204990, After recording, it takes a considerable amount of time to dry. In addition to those disclosed in the above publications, improvements from the material side are being actively made, but when recording is performed using ink and paper that are optimally designed, the absorption and drying of the ink may occur. Compared to what happens instantaneously, it is inadequate, indicating the limits of material improvements.

[0010]

In the case where recording is performed on a slow-drying recording medium having poor ink absorptivity and drying property, such as a recording sheet for an OHP, by using a liquid flight recording apparatus, the recording medium is printed on the recording medium. Disorder or deterioration of the image occurs due to the unabsorbed or undried dots of the attached ink, and it is difficult to achieve high-quality recording.

[0011]

According to the first aspect of the present invention,
The recording mode of a liquid flight recording apparatus that performs recording by forming dots by adhering recording liquid that has been jetted as droplets to a recording medium is set to a recording mode in which the liquid absorbency differs.
Is variable depending on the type of Rokutai, absorbing a record of bad cases
In mode, adjacent dots are formed almost simultaneously
The flying droplet adheres to the recording medium and forms
The adjacent meniscus dots that are formed
If the mass of the droplet flying so that it does not fall,
In the recording mode of
Recording head and recording in recording mode in case of poor performance
Recording mode when the relative speed with the recording material is good
At a time lower than the relative speed between the recording head and the recording medium.
I made it .

According to a second aspect of the present invention, a recording mode of a liquid flying recording apparatus which performs recording by forming dots by adhering a recording liquid which is ejected as droplets to a recording medium to form a dot is used. The mode can be freely switched between a fast-dry mode for recording on a recording medium and a slow-dry mode for recording on a slow-drying recording medium. In the case where the previous dot formed on the recording medium is in a meniscus-shaped state before drying or before penetrating into the recording medium, the adjacent dot formed later is the first dot. The mass of the droplet flying so as not to be in contact with and connected to the dot was made smaller than during recording in the quick-dry mode.

According to a third aspect of the present invention, a recording mode of a liquid flying recording apparatus which performs recording by forming dots by adhering a recording liquid which has been jetted as droplets onto a recording medium is set to a recording mode of the liquid. Depending on the type of recording medium with different absorbency
In the recording mode when absorption is poor.
When dots to be formed are formed one after the other,
Meniscus-shaped dots formed by first attaching to the body
Becomes a meniscus-shaped dot that is formed later
Make sure that the recording head and the recording
To the recording speed in the recording mode when absorption is good.
Lower than the relative speed between the recording medium and the recording medium, and
The meniscus dot formed earlier is dried or covered.
Eliminates meniscus swelling by penetrating into the recording medium
After Tsu, it was to form a meniscus-shaped de <br/> Tsu preparative formed later adjacent.

According to a fourth aspect of the present invention, there is provided the liquid according to the second aspect.
In the body flight recording method, the recording head is reciprocated.
A shuttle type recording system that forms an image with
Te, at a time of scanning at the time of recording by the late dry mode
Waiting time until the next scan and printing after printing
Was made longer than when recording in the quick-dry mode .

According to a fifth aspect of the present invention, there is provided the liquid according to the third aspect.
In a body flight recording device, the recording head
A shuttle type recording system that forms an image with
Therefore, when printing in the slow drying mode, one scan
Waiting time until the next scan and printing after printing
Was made longer than when recording in the quick-dry mode .

According to a sixth aspect of the present invention, recording is performed by depositing a recording liquid, which has been jetted as droplets, onto a recording medium to form dots, and recording is performed on a fast-dry recording medium. In a liquid flight recording apparatus capable of switching between a fast-dry mode in which recording is performed and a slow-dry mode in which recording is performed on a slow-dry recording medium, a plurality of continuously recorded recording objects are prevented from contacting each other. A separation tray for separating and holding was provided.

[0017]

According to the first aspect of the present invention, when recording in the slow drying mode and adjacent dots are formed substantially simultaneously, a meniscus formed by flying droplets adhering to a recording medium is formed. Adjacent dots that are attached to a slow-drying recording medium to form a meniscus by reducing the mass of the droplets that fly so that adjacent dots in the shape of a dot do not come into contact with each other and connect It is possible to prevent the images from being disturbed by being connected to each other, to obtain a clear image, and to prevent the recording head from being damaged during recording in the slow drying mode.
The relative speed with the recording medium is smaller than when recording in the quick-dry mode.
This makes it possible for adjacent dots to
Drying of formed dots and penetration into the recording medium are formed later
Effectively done Ru prior to the formation of dots.

According to the second aspect of the present invention, when adjacent dots are formed after a lapse of a certain time during recording in the slow drying mode, the previous dots formed on the recording medium are dried. When in a state of being raised in a meniscus shape before or before penetrating into a recording medium, the mass of a droplet flying so that an adjacent dot formed later does not contact and connect with the previous dot is determined by a quick drying mode. By making the size smaller than that at the time of recording, it is possible to prevent the adjacent dots which are attached to the slow-drying recording medium and have a meniscus shape from being connected to each other and disturb the image, and a clear image can be obtained.

According to the third aspect of the present invention, when adjacent dots are formed after a certain period of time during recording in the slow drying mode, the previous dots formed on the recording medium are dried. By forming adjacent dots after the ink has penetrated into the recording medium and the meniscus-shaped swelling has disappeared, adjacent dots having a meniscus shape are connected to each other even in a slow-drying recording medium, and the image is disturbed. Is prevented, clear image is obtained , slow drying mode
Speed between recording head and recording medium during recording
By making the temperature smaller than when recording in the quick-dry mode.
Between adjacent dots.
The shape of the dot that forms after drying and penetration into the recording medium
Ru is effectively carried out prior to formation.

According to the fourth aspect of the present invention, a shuttle type recording device is provided.
In the recording method, standby when recording in the slow drying mode
By making the time longer than when recording in the quick-dry mode
Between adjacent dots.
The shape of the dot that forms after drying and penetration into the recording medium
Ru is effectively carried out prior to formation.

According to a fifth aspect of the present invention, a shuttle type recording device is provided.
In the recording method, standby when recording in the slow drying mode
By making the time longer than when recording in the quick-dry mode
Between adjacent dots.
The shape of the dot that forms after drying and penetration into the recording medium
Ru is effectively carried out prior to formation.

According to the sixth aspect of the present invention, after recording, each recording medium is held separately from other recording mediums, so that they do not contact each other, and the recording bodies in an undried state come into contact with each other. No show-through or image quality degradation occurs.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS . Also not a, FIG. 5 shows a configuration example of the main part of the applicable liquid fly recording apparatus of the present invention. A carriage 2 is provided on the guide rail 1 and reciprocally movable along the guide rail 1. A plurality of liquid jet recording units 3 are mounted on the carriage 2.
Is provided in each of the liquid jet recording units 3, and a storage section (not shown) for storing ink which is a recording liquid supplied from an ink supply source (not shown), and ejects the stored ink. Recording head (not shown) provided with a nozzle section
Are provided. In addition, the four liquid jet recording units 3 are provided according to the ink colors to be used.

The carriage 2 is provided with a printed wiring board 4 for controlling the flight of ink, and a flexible cable 5 for connecting the printed wiring board 4 to the liquid jet recording unit 3. The printed wiring board 4 and the flexible cable 5 are connected via a connector (not shown). A drive belt 6 is connected to the carriage 2. One end of the drive belt 6 is connected to a drive roller 8 connected to a drive motor 7.
The other end of the driving belt 6 is wound around a rotatable driven roller (not shown).

Next, a first roller pair 11 composed of a pair of cylindrical rollers 9 and 10 with their outer peripheral surfaces abutting on a surface opposed in parallel to the surface on which the carriage 2 reciprocates. And three upper feed rollers 14 and 1 serving as transport means fixed to a cylindrical lower feed roller 12 and a shaft 13.
5 and 16 are provided. These roller pairs 11 and 17 are a recording sheet for OHP, which is a slow drying recording medium having poor ink absorbency and drying property, and an ink jet recording, which is a fast drying recording medium having good ink absorption and drying property. The second roller pair 17 is provided on the downstream side in the transport direction of the recording medium, and the upper feed rollers 14 to 16 are used for transporting the sheet 18 and the like in a state of facing the recording head. It is provided facing the recording surface of the body. A paper feed motor 19 for rotating the upper feed rollers 14 to 16 is connected to one end of the shaft 13.

The recording mode of the liquid flight recording apparatus is as follows.
8 and a slow drying mode when recording on the OHP recording sheet 20 or the like, which is a slow drying recording medium, and switching between these fast drying mode and slow drying mode. Is performed by a user using the liquid flight recording apparatus by switching a changeover switch (not shown).

Next, a case will be described in which ink droplets flying from the nozzle portion of the liquid jet recording unit 3 adhere to the recording medium to form dots. As a recording object,
When the ink-jet recording paper 18 is used, the dots are absorbed and dried instantaneously.
When the recording sheet 20 is used, the ink attached to the OHP recording sheet 20 becomes meniscus dots 21 as shown in FIG.

Here, in the case where recording is performed in the slow drying mode, and in the case where adjacent meniscus dots 21 are continuously formed, the mass of the flying droplets is changed in the case of recording in the quick drying mode. Is set smaller than
As shown in FIG. 1, adjacent dots 21 formed on the OHP recording sheet 20 are in contact with each other and are not connected. Therefore, as the time elapses, drying or permeation into the OHP recording sheet 20 is performed for each dot 21 and a clear image is obtained.

On the other hand, when the mass of the flying droplet is increased, the meniscus dots 21 adjacent in the vertical and horizontal directions come into contact with each other as shown in FIG. When the mass of the droplet is further increased, the meniscus-shaped dots 21 adjacent to each other in the oblique direction come into contact with each other as shown in FIG. When the adjacent meniscus dots 21 contact each other as shown in FIGS. 2 and 3, the image is disturbed, or in the case of color recording using inks of different colors, the inks are mixed. And the quality and color of the image deteriorate.

Next, a method of changing the mass of the flying droplet will be described. There are various methods depending on the difference in the method of forming flying droplets.
An electric recording signal is applied to a piezoelectric vibrating element as disclosed in JP-A-8-9622, the recording signal is changed into mechanical vibration of the piezoelectric vibrating element, and a flying droplet is formed according to the mechanical vibration. In the case of the system, the amount of mechanical vibration can be changed by changing the magnitude of the recording signal, and thereby the mass of the flying droplet can be changed. In the case of a thermal ink jet system as disclosed in Japanese Patent Publication No. 56-9429, for example, bubbles generated according to the input energy by a method described in Japanese Patent Application No. 1-192357. Can be changed, and the mass of the ink droplet flying from the ejection port can be changed accordingly.

Next, an AF (area factor) for quantitatively determining whether or not the adjacent meniscus dots 21 are in contact with each other will be described. In FIG. 6, Mr is the radius of the dot 21 immediately after being formed and before the drying or the penetration into the OHP recording sheet 20 is started. If the area of a square area connecting the centers of the dots 21 is So, and the area (hatched area) of the dots 21 included in the square area is Sb, the ratio of the hatched area to the square area is AF. Yes, AF = S
b / So × 100 (%). Then, the AF value in the case of FIG. 6 is Sb = πMr ² and So = (2M
r) ² , AF = {πMr ² } / ｛(2Mr)
² ｝ 100 (%) ≒ 78.5 (%). That is,
With an AF value larger than the boundary of AF = 78.5%, upper and lower and left and right meniscus-shaped dots 21 are connected, and with an AF value smaller than that, the meniscus-shaped dots 21 are not connected. Further, when the AF value is 100
In the case of%, the meniscus-shaped dots 21 adjacent in the oblique direction are also connected as shown in FIG. Therefore, to prevent adjacent meniscus dots 21 from being connected, the AF value needs to be 78.5% or less. If the AF value is too small, the image becomes thin, so the lower limit of the AF value needs to be 39.3%. The state where the AF value is 39.3% is a state in which another meniscus-shaped dot (shown by a broken line) can be formed at the center of four meniscus-shaped dots 21 adjacent to each other as shown in FIG. It is.

Referring to FIG. 8, a case where an image of English capital letter "N" is recorded with the AF value smaller than 78.5% as described above will be described. In this recording, only the liquid ejection recording unit 3 that ejects black ink among the plurality of liquid ejection recording units 3 is used. Eight nozzle portions are provided in a direction orthogonal to the direction. Then, when the carriage 2 is moved by one forward path, "N" is formed as shown in FIG. 8A, and the dots 21 constituting this "N" are adjacent in the meniscus state, but are adjacent. The adjacent dots 2 do not come into contact with each other.
This means that one dot 21 is formed for each arrow in the process of moving the image to the sharpest one-way path by preventing the image from being disturbed due to the connection of the ones.

At the time of recording in the slow drying mode of this embodiment, the moving speed of the carriage 2 is the same as that of recording in the quick drying mode, and high-speed recording can be performed even in the slow drying mode. Further, at the time of recording in the quick-dry mode, even if each dot 21 formed by increasing the mass of the flying droplet is made large as shown in FIGS. The droplet instantaneously penetrates into the ink jet recording paper 16 and dries, so that even if adjacent dots 21 come into contact with each other, the image is not disturbed and becomes unclear.

Here, a description will be given of the result when specific liquid flight recording is performed according to the present embodiment. As a quick-drying recording medium, matte coated paper NM (trade name) manufactured by Mitsubishi Paper Mills was used, and the character "N" was recorded in a quick-drying mode. The image quality was good. The AF value is 90%
(Specific example 1).

Next, a polyethylene terephthalate film having a thickness of 100 μm as a substrate (trade name, manufactured by Toray)
On the substrate, polyvinylpyrrolidone (PV
A solution obtained by mixing 88 parts of a 10% dimethylformamide (hereinafter referred to as DMF) solution (PK-90, manufactured by GAF) and 12 parts of a 10% DMF solution of a novolak-type phenol resin (Regitop PSK-2320, manufactured by Gunei Chemical) is used. An OHP recording sheet was manufactured by applying a solution obtained by adding 0.7 parts of oleic acid to a solution heated to 90 ° C. while stirring. When the character "N" was recorded using the OHP recording sheet in the same quick-drying mode as in the specific example 1 above, the image was crushed and almost no character could be identified (specific example 2). .

Next, when the letter "N" was recorded in the slow drying mode in which the AF value was 78.5% or less using the recording sheet for OHP produced in Example 2, a clear image was obtained. (Specific example 3).

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those described in FIGS. 1 to 8 are denoted by the same reference numerals, and description thereof is omitted (the same applies hereinafter) . In the present embodiment, during recording in the slow drying mode, adjacent dots 21 are formed before and after a predetermined time. When a dot adjacent to the previously formed dot 21 is formed later, when the previously formed dot 21 is in a state of being raised in a meniscus shape, the dot 21 to be formed later is formed first. The mass of the droplet that flies so as not to contact and connect with the dot 21 is made smaller than that in the case of the quick drying mode, and specifically, as shown in FIG. 1, the AF value is set to less than 78.5%. On the other hand, when forming the dots 21 adjacent to the previously formed dots 21 later, when the previously formed dots 21 have lost meniscus-like swelling due to drying or penetration into the recording medium, The mass of the flying droplet may be the same as in the case of the quick-dry mode.

The process of this recording method will be described by taking the case of recording the above-mentioned "N" image as an example. First,
In order to record the "N" image, the carriage 2 reciprocates two times. During the first outward path, meniscus-shaped dots 21 are formed at locations indicated by rightward arrows in FIG. 9A. The dots 21 are not adjacent to each other in any of the vertical direction, the horizontal direction, and the oblique direction. Next, at the time of the first return trip, FIG.
In (b), the dots 21 are formed at the locations indicated by the left-pointing arrows. These dots 21 formed during the first return trip are not adjacent to each other in any of the vertical direction, the horizontal direction, and the oblique direction. On the other hand, the dots 21 formed during the first forward pass and the dots 21 formed during the first return pass are partially adjacent to each other.
However, when the previously formed dots 21 are in a raised state in a meniscus shape, the mass of the droplets flying so that the subsequently formed dots 21 do not contact and connect with the previously formed dots 21 is quickly dried. Since it is smaller than in the case of the mode, it is possible to prevent the adjacent dots 21 from being connected to each other and disturbing the image. In addition, when the previously formed dots 21 have no meniscus-shaped swelling due to drying or penetration into the recording medium, adjacent dots are set even if the flying droplets have the same mass as that in the quick-dry mode. It is prevented that the dots 21 are connected to each other and the image is disturbed.

Subsequently, the carriage 2 reciprocates continuously, and at the time of the second outward pass, dots 21 are formed at the locations indicated by the rightward double arrows in FIG. 9C, and at the time of the second return pass, the dots 21 are formed as shown in FIG. In (), the dot 21 is formed at the position indicated by the left double arrow, and the image of “N” is completed. Here, the meniscus-shaped dots 21 formed at the time of the second outward pass, and the meniscus-shaped dots 21 formed at the time of the second return pass, can be in any of the vertical direction, the horizontal direction, and the oblique direction. Not adjacent. On the other hand, the dots 21 formed on the first return path and the dots 21 formed on the second forward path, the dots 21 formed on the second forward path, and the dots 21 formed on the second return path are partially adjacent to each other. As in the case of the dots 21 formed in the first outward pass and the dots 21 formed in the first return pass, the connection of the adjacent dots 21 is prevented.

It should be noted that the carriage 2 is reciprocated twice so that "N"
The recording method for forming the above image is not limited to the method shown in FIG. 9, and the pattern of forming the dots 21 in each forward pass and return pass may be changed as shown in FIG.

Here, adjacent dots 21 are formed at a predetermined time interval, and the dots 2 formed first are formed.
A description will be given of the result of liquid flight recording in a case where adjacent dots 21 are formed after the meniscus-shaped swelling is eliminated by drying or infiltration into a recording medium. Using the OHP recording sheet produced in Example 2, the letter "N" was recorded in the slow drying mode. Although the AF value was set to 100% as in the case of recording in the quick-dry mode, a clear image was obtained (Specific Example 4).

Further, using the OHP recording sheet manufactured in the specific example 2, using three color inks of yellow, magenta, and cyan, a color image signal read by a scanner is input to each of the recording heads. When color recording was carried out according to Example 1, clear images were obtained without mixing and turbidity of each color (Specific Example 5).

Next, a third embodiment of the present invention will be described with reference to FIG . In this embodiment, during recording in the slow drying mode, adjacent meniscus-shaped dots 21 are formed before and after a predetermined time, and the meniscus state of one of the previously formed dots 21 is changed for drying or OHP. The other adjacent dots 21 are formed after disappearing due to permeation into the recording sheet 20. Note that the AF value of the formed dots 21 is 78.5% or more and less than 100% as in the case of recording in the quick-dry mode, and that the dots 21 adjacent in the oblique direction are in contact with each other and connected. Instead, the meniscus-shaped dots 21 that are adjacent in the oblique direction may be formed substantially simultaneously. Therefore, when the above-mentioned "N" image is recorded, the carriage 2 reciprocates one time, and at the time of the outward movement of the carriage 2, a meniscus dot 21 is formed at a position indicated by a rightward arrow in FIG. When the carriage 2 returns, a meniscus-shaped dot is formed at the position indicated by the leftward arrow in FIG.
The image “N” is completed.

Here, a description will be given of the result when specific liquid flight recording is performed according to the present embodiment. Using the OHP recording sheet manufactured in Example 2, an "N" image was recorded in the slow drying mode. Although the AF value was set to 80% as in the case of recording in the quick-dry mode, a clear image was obtained (Specific Example 6).

A clear image was also obtained when a commercially available art paper was used as a recording medium and an "N" image was recorded in the slow drying mode with an AF value of 95% (Specific Example 7). .

On the other hand, when a commercially available art paper was used as a recording medium and an "N" image was recorded in a quick-dry mode with an AF value of 95%, the image was crushed to the extent that it could not be distinguished as a character. (Specific Example 8).

Next, a fourth embodiment of the present invention will be described with reference to FIGS . In the present embodiment, similarly to the method described with reference to FIG. 11, a recording method for forming an image by reciprocating the recording head together with the carriage 2 and combining the dots 21 formed on the forward path and the dots 21 formed on the backward path. In the recording in the slow drying mode, the standby time for switching the moving direction between the forward path and the returning path is made longer than that in the recording in the quick drying mode. First, FIG. 12 shows a drive pulse of the drive motor 7 for reciprocating the carriage 2 and a moving speed of the carriage 2 when printing is performed in the quick-dry mode. The portion where the drive pulse becomes denser and the moving speed of the carriage 2 is shown in an inclined state indicates a state in which the carriage 2 is accelerating or decelerating. During recording (section B), the moving speed of the carriage 2 is constant. Further, when switching the movement direction of the carriage 2 between the forward path and the return path, there is a standby time (C section) in which the carriage 2 stops moving.

FIG. 13 shows the drive pulse of the drive motor 7 and the carriage 2 when printing is performed in the slow drying mode.
The standby time (C 'portion) when switching the moving direction of the carriage 2 between the forward path and the return path is longer than that in the recording in the quick drying mode.

Here, a meniscus dot 21 is formed at the point indicated by the rightward arrow as in FIG. 11A on the outward trip, and the meniscus dot is formed at the point indicated by the leftward arrow on the return path as in FIG. 11B. To form dots 21,
Since the waiting time has been extended, the dots 21
Is formed, the meniscus state of the dots 21 formed on the outward path disappears due to drying or permeation into the OHP recording sheet 20, thereby preventing the adjacent dots 21 from being connected to each other and disturbing the image. You.

Next, a fifth embodiment of the present invention will be described with reference to FIG . In the present embodiment, a recording method for forming an image by reciprocating the recording head together with the carriage 2 and synthesizing the dots 21 formed on the forward path and the dots 21 formed on the return path, similarly to the method described with reference to FIG. In the recording in the slow drying mode, the moving speed of the carriage 2 is slower than that in the recording in the quick drying mode. Therefore, the relative speed between the recording head moving integrally with the carriage 2 and the OHP recording sheet 20 is lower than the relative speed between the recording head and the inkjet recording paper 18 during recording in the quick-dry mode. In this embodiment, a method is adopted in which the moving speed of the carriage 2 is reduced by increasing the pulse interval of the driving pulse. However, the driving force generated by the driving motor 7 is transmitted to the driving belt via a reduction gear. 6 may be transmitted.

Here, meniscus-shaped dots 21 are formed at points indicated by right-pointing arrows on the outward path, as in FIG. 11A, and meniscus points are formed at points indicated by left-pointing arrows on the return path, as in FIG. 11B. To form dots 21,
When printing in the slow drying mode, the moving speed of the carriage 2 is slowed, so that when forming the dots 21 on the return path, the meniscus state of the dots 21 formed on the forward path is dried or permeated into the OHP recording sheet 20. This prevents the adjacent dots 21 from being connected to each other and disturbing the image.

Next, a sixth embodiment of the present invention will be described with reference to FIG . This embodiment is a combination of the embodiment described with reference to FIG. 13 and the embodiment described with reference to FIG. 14, and has a standby time for switching the moving direction of the carriage 2 during printing in the slow drying mode. Is longer than during printing in the quick-dry mode, and the moving speed of the carriage 2 during printing in the slow-dry mode is lower than during printing in the quick-dry mode. Therefore, when forming the dots 21 adjacent to the dots 21 formed on the outward path on the return path, the meniscus state of the dots 21 formed on the outward path has disappeared due to drying or penetration into the OHP recording sheet 20. In addition, it is possible to prevent the adjacent meniscus dots 21 from being connected to each other, thereby preventing the image from being disturbed.

Next, a modification of this embodiment will be described. Book
In the modified example, during the recording in the slow drying mode, the frequency of flying droplets is made smaller than that in the recording in the quick drying mode, and when there are adjacent dots 21, the dots 21 are kept for a certain time. It is formed in such a way. That is, the generation time of the flying droplet is delayed, and in the adjacent dots 21, the meniscus state of the previously formed dot 21 disappears due to drying or penetration into the OHP recording sheet 20, and then the other adjacent dot 21 21 are formed. Therefore, it is possible to prevent the adjacent dots 21 from being connected to each other and to disturb the image, and furthermore, since the frequency of generation of the droplets is small, each generated droplet is stable, and it is possible to form a reliable droplet. There are advantages. Further, in the printing in the slow drying mode, printing is performed by moving the carriage 2 once, and the mass of the flying droplet is set to be the same as that in the quick drying mode. Further, as a driving method of the carriage 2, a method of increasing the pulse interval of the driving pulse as shown in FIG.

Next, a seventh embodiment of the present invention will be described with reference to FIG . Also not a heater 22 is inside the drying section of the lower feed roller 12 of the liquid flight recorder is provided, further, opposed to the lower feed roller 12 sandwich the OHP recording sheet 20 such as recording member A heater 22a as a drying unit is provided at the position. As the heaters 22 and 22a, an infrared lamp type, a Joule heating type using a nichrome wire, or the like is adopted.
In this embodiment, the input energy to the heaters 22 and 22a during recording in the slow drying mode is larger than that during recording in the quick drying mode. Therefore, drying of the meniscus-shaped dots 21 formed at the time of recording in the slow drying mode is promoted, and it is possible to prevent the adjacent dots 21 from being connected to each other and disturbing the image. When recording is performed on the inkjet recording paper 18 in the quick-drying mode, drying of the dots 21 formed on the inkjet recording paper 18 or the inkjet recording paper 1
8 is instantaneously infiltrated into the heater 22, 22,
The input energy to a etc. may be very small,
Further, the input energy to these heaters 22 and 22a may be set to zero.

In this embodiment, the heaters 22 and
Although the description has been given by taking as an example the case where 22a is provided to be opposed, only one of them may be provided. And
When the heater 22 is provided only inside the upper feed roller 12, there is no need to provide a dedicated space for installing the heater 22a, and the liquid flying recording apparatus can be made compact.

Here, a description will be given of the result when specific liquid flight recording is performed according to the present embodiment. When the OHP recording sheet on which the color recording described in the specific example 5 was performed was dried using the heaters 22 and 22a, an image with a tight feeling was obtained. When the pixel diameter was measured, it was about 95 μm in the specific example 5 and about 90 μm in the present example. And
When the OHP recording sheet on which color recording was performed according to this embodiment was projected by OHP, a very good OHP image was obtained (Specific Example 9).

Next, an eighth embodiment of the present invention will be described with reference to FIG . Also not a separation tray 24 is provided with a plurality of stages of separation holding portion 23 in a liquid flying recording apparatus. Further, when recording is continuously performed in the slow drying mode, an up-down driving mechanism 25 for guiding the OHP recording sheet 20 after recording to the separation holding unit 23 one by one is provided. The drive mechanism 25 includes a solenoid 26 and a contact member 27 that is moved up and down by the solenoid 26 and that contacts the back surface of the OHP recording sheet 20.
It is composed of

Then, a plurality of OHP sheets are set in the slow drying mode.
When the recording is performed on the recording sheet 20, the OHP recording sheet 20 after the recording is conveyed by the second roller pair 17 and the like, and is guided one by one to each separation holding unit 23 by the vertical driving mechanism 25. In addition, the overlapping of the OHP recording sheets 20 after recording is prevented. For this reason, it is possible to prevent the dots that have not been sufficiently dried from being rubbed by the back surface of the OHP recording sheet 20 that has been ejected later and stacked, thereby disturbing the image. Furthermore, in the OHP recording sheet 20 discharged later, the back surface is prevented from being stained due to the dots of the OHP recording sheet 20 discharged earlier adhering to the back surface.

Here, a description will be given of a result when specific liquid flight recording is performed according to the present embodiment. The color printing described in the specific example 5 is continuously performed on the three OHP recording sheets manufactured in the specific example 2, and the OHP recording sheets after the recording are separated one by one using the vertical drive mechanism 25. The sheet was discharged to the holding unit 23. The result is each OHP
In the recording sheet for use, the image was not disturbed and the back surface was not stained, and a good OHP image was obtained when projected by OHP (specific example 10).

On the other hand, when the three OHP recording sheets on which continuous recording was performed in Example 10 were ejected in a state of being superimposed on a normal tray, image disorder occurred and ink adhered to the back surface. However, when projected with OHP, an OHP image that was very difficult to see was obtained (specific example 11).

Next, a ninth embodiment of the present invention will be described with reference to FIGS . In the present embodiment, when the recording on the OHP recording sheet 20 is performed in the slow drying mode, the upper feed rollers 14 to 16 serving as the conveying means are set to the OH.
The non-recording surfaces on both sides of the P recording sheet 20 where recording is not performed are brought into contact with each other. Here, the three upper feed rollers 14 to 16 are fixed to the shaft 13, and the center upper feed roller 15 is shifted to the left from the center position.

FIG. 18 shows a state in which the recording is performed on the “A3” size ink jet recording paper 18 in the quick drying mode, and the upper feed roller 15 at the center is in contact with the recording surface of the ink jet recording paper 18. Although the ink-jet recording paper 18 after recording is conveyed, since the dots 21 formed on the ink-jet recording paper 18 are instantaneously dried, even if the upper feed roller 15 contacts the recording surface of the ink-jet recording paper 18, The quality of the image formed on the inkjet recording paper 18 does not deteriorate.

On the other hand, FIG. 19 shows that "A4"
This shows a state in which recording is performed on the OHP recording sheet 20 of a size, and two upper feed rollers 14 and 15 for transporting the OHP recording sheet 20 are OHP recording sheets.
The OHP recording sheet 20 is conveyed in contact with both sides of the recording sheet 20 for non-recording where no image is formed. Therefore, even if the dots 21 formed on the OHP recording sheet 20 are not sufficiently dried,
The upper feed rollers 14 and 1
5 is prevented from touching and disturbing the image.

In the present embodiment, since the size of the OHP recording sheet 20 is usually "A4", the center upper feed roller 15 is fixed at a position shifted to the left from the center position in accordance with the sheet size. Although the above description has been given as an example, the upper feed roller 15 at the center may be movable along the shaft 13 and may be moved according to the size of the OHP recording sheet 20.

Next, a tenth embodiment of the present invention will be described with reference to FIGS . In the present embodiment, when recording is performed in the slow drying mode, dots 21 are formed.
The vicinity of the recording surface of the HP recording sheet 20 is held at an angle of 45 ° or less with respect to the horizontal plane until the meniscus state of the dots 21 disappears.

FIG. 20 shows a state in which the OHP recording sheet 20 immediately after the formation of the dots 21 is set up in a substantially vertical state. The meniscus dots 21 hang down and the shape of the dots 21 changes. It collapses or runs off, and the formed image is disturbed. On the other hand, as shown in FIG.
When the angle (θ) with respect to the horizontal plane is set to 45 ° or less, it is possible to prevent the shape of the dots 21 from collapsing or falling. Accordingly, by maintaining the vicinity of the recording surface of the OHP recording sheet 20 at an angle of 45 ° or less with respect to the horizontal plane until the meniscus state of the dots 21 disappears, deterioration in image quality is prevented.

Here, a description will be given of a result in a case where specific liquid flight recording is performed according to the present embodiment. On the OHP recording sheet and the commercially available art paper manufactured in the specific example 2, five sheets were respectively recorded in the slow drying mode. Then, the OHP recording sheet immediately after recording and the art paper are respectively 90 °, 60 °, 45 °,
It was held at an angle of 30 ° or 0 °, and the behavior of the meniscus dot was examined. As a result, in the OHP recording sheet or the art paper inclined at 90 ° or 60 °, the deformation of the dots and the falling off occurred. On the other hand, 45 ゜, 30 ゜,
In an OHP recording sheet or art paper inclined at an angle of 0 °, the meniscus-shaped dots do not deform or run off, and each dot is dried while remaining independent from each other, or the OHP recording sheet or art paper is It penetrated into the inside and remained as a pixel without disorder (Specific Example 12).

[0068]

According to the first aspect of the present invention, the recording mode of the liquid flying recording apparatus for performing recording by adhering a recording liquid, which is ejected as liquid droplets, onto a recording medium to form dots is described. Different types of recording media with different liquid absorptivity
The recording mode when absorption is poor.
When adjacent dots are formed almost simultaneously,
A menu formed by the ejected droplets adhering to the recording medium
Make sure that adjacent scass-like dots do not touch and connect
The mass of droplets flying to the recording mode when absorption is good
When the absorption is poor
Between the recording head and the recording medium in the recording mode
Set the recording head in the recording mode when the absorption is good.
Slower than the relative speed between the
When printing is performed in the slow drying mode and adjacent dots are formed substantially at the same time, meniscus-shaped adjacent dots formed by the flying droplets adhering to the recording medium are not contacted and connected. By reducing the mass of droplets that fly to the surface during recording in the fast-dry mode, it is possible to prevent adjacent dots that form a meniscus on the slow-drying recording medium from being connected and disturbing the image. This gives a clear image and is suitable for recording in slow drying mode.
The relative speed between the recording head and the recording medium
By making it smaller than when recording, adjacent dots
Drying of the dots formed earlier between each other and into the recording medium
Effectively penetrates before the formation of dots that form later
It has the effect of such Re that.

According to a second aspect of the present invention, when the recording is performed in the slow drying mode in which the recording is performed on the slow drying recording medium and the adjacent dots are formed after a certain period of time,
When the previous dot formed on the recording medium is in a meniscus swelling state before drying or before penetrating into the recording medium, an adjacent dot formed later does not contact and connect with the previous dot. As described above, since the mass of the flying droplet is made smaller than that in the recording in the quick drying mode, it is possible to prevent the adjacent dots in the meniscus state from being connected to each other and to disturb the image, and thereby, it is possible to prevent the ink from drying slowly. This has the effect that a clear image can be obtained even on a recording medium.

According to the third aspect of the present invention, the droplets fly as droplets.
The liquid for recording is attached to the recording medium to form dots
Recording mode of the liquid flight recording device
Depending on the type of the recording medium having different absorbency of the liquid.
In the recording mode when absorption is poor.
When dots to be formed are formed one after the other,
Meniscus-shaped dots formed by first attaching to the body
Becomes a meniscus-shaped dot that is formed later
Make sure that the recording head and the recording
To the recording speed in the recording mode when absorption is good.
Lower than the relative speed between the recording medium and the recording medium, and
The meniscus dot formed earlier is dried or covered.
Eliminates meniscus swelling by penetrating into the recording medium
After that, a meniscus-shaped window formed next to
Recording in slow drying mode.
Time and the shape of the dots after adjacent dots
If it is formed, the leading dot formed on the recording medium
Is dried or penetrates into the recording medium to form a meniscus
By forming adjacent dots after rising has stopped,
And even a slow-drying recording medium becomes meniscus-shaped.
Adjacent dots are connected to each other
And a clear image is obtained.
Increase the relative speed between the recording head and the recording medium during recording.
By making it smaller than when recording in dry mode,
Drying or drying of the previously formed dots
Penetration into the recording medium is effective before forming the dots that are formed later.
Has the effect of such Ru performed results manner.

The invention according to claim 4 provides the liquid according to claim 2
In the body flight recording method, the recording head is reciprocated.
A shuttle type recording system that forms an image with
Therefore, when printing in the slow drying mode, one scan
Waiting time until the next scan and printing after printing
Was longer than when recording in the quick-dry mode, so the shuttle
Type recording method when recording in slow drying mode.
The standby time longer than when recording in the quick-dry mode.
The adjacent dots form the dots formed earlier.
Dots formed later after drying of the sheet and penetration into the recording medium
Has the effect of such Ru is effectively performed prior to formation.

According to a fifth aspect of the present invention, there is provided the solution according to the third aspect.
In a body flight recording device, the recording head
A shuttle type recording system that forms an image with
Therefore, when printing in the slow drying mode, one scan
Waiting time until the next scan and printing after printing
Was longer than when recording in the quick-dry mode, so the shuttle
Type recording method when recording in slow drying mode.
The standby time longer than when recording in the quick-dry mode.
The adjacent dots form the dots formed earlier.
Dots formed later after drying of the sheet and penetration into the recording medium
Has the effect of such Ru is effectively performed prior to formation.

According to the sixth aspect of the present invention, after recording, each recording medium is held separately from other recording mediums, so that they do not come into contact with each other, but come into contact with each other in an undried state. It is possible to prevent show-through and image quality deterioration.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state of formation of adjacent meniscus dots in a first embodiment of the present invention.

FIG. 2 is a plan view showing a state in which meniscus dots adjacent in the vertical and horizontal directions are in contact with each other.

FIG. 3 is a plan view showing a state in which meniscus dots adjacent in the vertical direction, the horizontal direction, and the oblique direction are in contact with each other.

4A and 4B show meniscus dots formed on a slow-drying recording medium, wherein FIG. 4A is a plan view and FIG. 4B is a longitudinal sectional front view.

FIG. 5 is a perspective view showing a main part of the liquid flight recording apparatus.

FIG. 6 is an AF that determines whether or not meniscus dots formed on a slow-drying recording medium are in contact with each other and are connected;
FIG.

FIG. 7 is an explanatory diagram showing a state of a minimum usable AF value.

FIG. 8 shows a formed “N” image, in which (a)
FIG. 4 is an explanatory diagram showing a dot arrangement pattern, and FIG. 4B is an explanatory diagram showing a dot forming process.

FIG. 9 is an explanatory diagram showing a dot forming process when forming an “N” image according to the second embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a modification of the second embodiment.

FIG. 11 is an explanatory diagram showing a dot forming process when forming an “N” image according to the third embodiment of the present invention.

FIG. 12 is an explanatory diagram showing a motor drive pulse and a moving speed of a carriage when printing is performed in a quick drying mode in a fourth embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a motor drive pulse and a moving speed of a carriage when printing is performed in the slow drying mode.

FIG. 14 is an explanatory diagram showing a motor drive pulse and a moving speed of a carriage when printing is performed in a slow drying mode in a fifth embodiment of the present invention.

FIG. 15 is an explanatory diagram showing a motor driving pulse and a moving speed of a carriage when printing is performed in a slow drying mode in a sixth embodiment of the present invention.

FIG. 16 is a side view showing a seventh embodiment of the present invention.

FIG. 17 is a perspective view showing an eighth embodiment of the present invention.

FIG. 18 is a front view showing a state at the time of recording in a quick-dry mode according to a ninth embodiment of the present invention.

FIG. 19 is a front view showing a state during recording in the slow drying mode.

FIG. 20 is a side view showing a state in which the shape of a meniscus dot in the tenth embodiment of the present invention is broken.

FIG. 21 is a side view showing a state in which the shape of a meniscus dot does not collapse.

[Explanation of symbols]

 14-16 Conveying means 18 Quick-drying recording medium 20 Slow-drying recording medium 21 Dots 22, 22a Drying means 24 Separation tray

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B41J 2/01 B41J 2/07 B41J 2/205 B41J 29/00

Claims (6)

(57) [Claims] 1. A recording mode of a liquid flight recording apparatus that performs recording by forming dots by attaching a recording liquid that has been jetted as droplets to a recording medium, and changing the recording mode of the liquid
Variable according to the type of recording medium with different absorptivity
In the bad print mode, adjacent dots
When formed at the same time, the flying droplets
Meniscus-shaped adjacent dots attached to each other
The mass of the droplet flying so that it does not come into contact with
If it is smaller than in recording mode when absorption is good
In addition, the recording in the recording mode when the absorbency is poor
If the relative speed between the recording head and the recording
The relative speed between the recording head and the recording
Liquid flight recording instrumentation, characterized in that as slower Ri
Place . 2. A recording mode of a liquid flying recording apparatus which performs recording by forming dots by adhering a recording liquid flying as droplets onto a recording medium to perform recording on a fast-dry recording medium. It is possible to freely switch between a fast drying mode and a slow drying mode for performing recording on a slow drying recording medium, and when recording is performed in the slow drying mode and adjacent dots are formed after a certain period of time, the above-described method is used. When the previous dot formed on the recording medium is in a meniscus swelling state before drying or before penetrating into the recording medium, an adjacent dot formed later does not contact and connect with the previous dot. Wherein the mass of the flying droplet is made smaller than that in the recording in the quick-dry mode. 3. A recording mode of a liquid flying recording apparatus that performs recording by forming dots by attaching a recording liquid that has been ejected as droplets to a recording medium to change the recording mode of the liquid
Variable according to the type of recording medium with different absorptivity
In the bad print mode, adjacent dots
When formed on the recording medium,
Meniscus dots formed next to each other
It doesn't touch the meniscus dots
As shown, the relative speed between the recording head and the recording
The relative speed between the recording head and the recording medium in the recording mode
The meniscus previously formed on the recording medium
Scattered dots are dried or penetrate into the recording medium and
After the scass-like swell has disappeared,
A liquid flight recording apparatus characterized by forming meniscus-shaped dots formed therefrom . 4. An image by reciprocating a recording head.
In the shuttle type recording method for forming an image,
After printing by one scan when recording with
Quick drying mode for waiting time until next scanning and printing
3. The recording medium according to claim 2, wherein the recording time is longer than the recording time.
Liquid flight recording method of the mounting. 5. An image by reciprocating a recording head.
In the shuttle type recording method for forming an image,
After printing by one scan when recording with
Quick drying mode for waiting time until next scanning and printing
4. The recording method according to claim 3, wherein the recording time is longer than the recording time.
Onboard liquid flight recorder. 6. A recording mode in which recording is performed by forming dots by attaching a recording liquid flying as droplets to a recording medium to form dots, and a recording mode is a fast drying mode in which recording is performed on a quick drying recording medium. 2. Description of the Related Art In a liquid flight recording apparatus capable of switching to a slow-dry mode in which recording is performed on a slow-drying recording medium, separation in which a plurality of recording mediums on which recording is continuously performed is separated and held so as not to contact each other. A liquid flight recording device comprising a tray.