JP2002160410A - Ink-jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a longitudinal paper along the width direction with a high positioning accuracy without the need of forming a hole therein. SOLUTION: An ink-jet printing unit 6 prints an image on a paper 2 based on the control by a controller 20 as well as prints a cutting mark at a position of the paper 2 to be cut. A cutting position detecting unit 8 sends a signal showing detection of the cutting mark to a controller 20. After receipt of the signal, the controller 20 drives a motor 18 by an appropriate timing. Thereby, the paper 2 is cut by a cutting unit 9 at the position with the cutting mark printed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer configured to print on a print medium a mark indicating a position at which a long print medium is to be cut.

[0002]

2. Description of the Related Art Ink jet printers perform printing by spraying liquid ink onto paper, and have the advantage that the size of the apparatus can be reduced and high quality printing can be performed. In addition, when a long sheet of paper such as roll paper or fold paper that needs to be cut is used in an ink jet printer, printing is generally performed before cutting the paper in order to improve print quality. Therefore, in an ink jet printer, it is often necessary to cut a long printed sheet according to the size of a printed image.

[0003]

In an ink-jet printer, in order to cut a long printed sheet according to the size of a printed image, the sheet is cut only in consideration of the sheet conveyance timing. Alternatively, it is conceivable that a mark is attached to the sheet, and the sheet is cut at a position near the mark in response to the mark being detected near the upstream side of the cutter. However, in the former case, the sheet is not necessarily cut at a predetermined position due to meandering of the sheet or the like, and the cutting position accuracy often deteriorates.

On the other hand, as a technique for determining the cutting position of a sheet based on a certain mark on the sheet as in the latter, a punch 51 is provided at a sheet end near the cutting position 54 of the sheet 50 ( 4A, a notch (cut) 52 having a predetermined size is provided at a paper edge near a cutting position 54 of the paper 50 (see FIG. 4B).
Further, it is conceivable that a mark is written on a surface opposite to a printing surface of a sheet by a dot impact print head or the like.

[0005] However, the technique of providing the hole 51 or the notch 52 by the punch has a problem that a part of the sheet is missing. In addition, the technology for writing a mark on the surface opposite to the printing surface of the paper with a dot impact print head, etc., can print the mark with high positional accuracy on the printing surface, although part of the paper is not missing. There is a problem that the cutting position accuracy is deteriorated due to the difficulty.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ink jet printer capable of cutting a print medium with high positional accuracy without causing a part of a print medium such as paper to be chipped.

[0007]

According to a first aspect of the present invention, there is provided an ink jet printer, comprising: a printing unit for printing an image on a long printing medium by an ink jet method; Cutting means for cutting the print medium along the width direction, conveying means for conveying the print medium from a printing position by the printing means to a cutting position by the cutting means, and the printing A first detection unit for detecting a first mark printed on the print medium between a position and the cutting position, such that the first mark is printed on the print medium. Controlling the printing means, and cutting the printed printing medium at a position near the first mark in response to the first mark being detected by the first detecting means. Said And a first control means for controlling the cross-sectional section.

According to the first aspect, the printed print medium is cut at a position near the first mark in response to the detection of the first mark printed on the print medium. It is possible to cut the print medium at a desired position without forming the print medium. Also, since the first mark is printed by an ink jet type printing means for printing an image, and the print medium is cut at a position near the first mark,
The cutting position accuracy of the print medium becomes extremely high. Also, the first
The device configuration is simple because no separate means is required for marking the mark.

Further, in the ink jet printer according to the present invention, the first control means controls the printing means so that the color of the first mark is changed according to the surrounding color.

According to the second aspect, the color of the first mark can be made sufficiently different from the surrounding color in hue, saturation, and brightness so that the first mark is detected with high accuracy. .
This makes it possible to prevent the first mark from being missed or erroneously detected with a high probability.

According to a third aspect of the present invention, the first detecting means detects the first mark only within a predetermined range in a longitudinal direction of the print medium.

According to the third aspect, another landmark having the same or similar shape as the first landmark is located at a position relatively long in the longitudinal direction from the first landmark and the print medium should not be cut. Even if it is printed as a part of the first mark, the other mark is not erroneously detected as the first mark, so that the printing medium is placed in the wrong position other than the position near the first mark. Can be prevented with high probability.

In the ink jet printer according to a fourth aspect of the present invention, a second mark is printed on the print medium at a position close to at least one of the width directions selected from the first marks. Control means for controlling the printing means, and on the downstream side of the printing position,
Second detection means for detecting the second mark printed on the print medium; and detecting the second mark by the second detection means. Output means for outputting a control signal such that one or a plurality of the print media cut at a nearby position are sorted with the second mark as a boundary.

According to the fourth aspect, a control signal is output such that the print medium is sorted on the basis of the second mark in response to the detection of the second mark. If the second landmark is printed together with the first landmark, it is possible to sort and arrange the printed print media for each order.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of an ink jet printer according to the present embodiment and a sorting device connected to the outside thereof. As shown in FIG. 1, an ink jet printer 1 according to the present embodiment includes a plurality of transport rollers including a dot impact print unit 5, an ink jet print unit 6, and a drive roller unit 7 in a substantially rectangular parallelepiped housing 28. It has a pair 15, a cutting position detecting unit 8, a cutting unit 9, and an order detecting unit 11. In the housing 28, a long sheet 2 having a winding part 2a wound in a roll shape is arranged. The winding portion 2a of the paper 2 is held by a drum 3 that is rotatable around the axis. In addition, as described later, the operation of each part of the ink jet printer 1 and the operation of the sorting device 30 are controlled by the controller 20 disposed in the housing 28.

The winding unit 2a is driven by the driving roller unit 7.
The paper 2 that has been unwound from the paper rolls
The sheet is conveyed to the downstream side by being pinched by the printer, and sequentially passes through the dot impact printing unit 5, the ink jet printing unit 6, the order detection unit 11, and the cutting position detection unit 8. Thereafter, the sheet 2 is cut into a predetermined length by the cutting unit 9, discharged from the discharge port 25, and supplied to the sorting device 30.

The transport roller pair 1 closest to the cutting unit 9
The drive roller unit 7, which is 5, is a drive roller pair driven by the motor 17 controlled by the controller 20. On the other hand, the transport roller pairs 15 other than the drive roller unit 7 upstream of the cutting unit 9 are all driven roller pairs. The transport roller pair 15 downstream of the cutting unit 9 is connected to a drive source (not shown) to form a drive roller pair.

The dot impact printing unit 5 performs printing by a large number of thin pins selectively hitting the paper 2 via an ink ribbon. The dot impact printing unit 5 prints additional information such as date and time of printing and a serial number on a surface opposite to a printing surface of the ink jet printing unit 6 based on a signal from the controller 20.

The ink jet printing unit 6 prints the paper 2 by ejecting liquid ink from a nozzle for each dot. The ink jet printing unit 6 ejects ink from the nozzle using a piezoelectric element, a bubble jet (registered trademark) method. Alternatively, any of other methods may be adopted.

The ink-jet printing unit 6 prints a desired image on the conveyed paper 2 based on a signal from the controller 20 and, at a cutting position of the paper 2, a position for cutting the printed paper 2. (Hereinafter, referred to as “cutting mark”) and a mark indicating the position at which the order is switched (hereinafter, referred to as “sorting mark”).

The order detecting unit 11 is arranged between the ink jet printing unit 6 and the cutting unit 9 and detects a sorting mark printed by the ink jet printing unit 6 on the printed paper 2. The output signal of the order detection unit 11 is
Supplied to

The cutting position detecting unit 8 is, like the order detecting unit 11, the ink jet printing unit 6.
And a cutting unit 9 for detecting a cutting mark printed on the paper 2 by the inkjet printing unit 6. The output signal of the cutting position detecting device 8 is supplied to the controller 20.

The cutting unit 9 includes a fixed blade 9a disposed on the same side of the sheet 2 as the dot impact printing unit 5, and a movable blade 9b disposed opposite the fixed blade 9a with the sheet 2 interposed therebetween. have. Both the fixed blade 9a and the movable blade 9b are rectangular blades having a width slightly larger than the width of the paper 2.

The movable blade 9b is rotatable about a fulcrum 10a, and is supported at the fulcrum 10a by a support member 10 which is bent in a "-" shape. Support member 10
The motor 18 controlled by the controller 20
A rotational torque is applied. Thereby, the moving blade 9b
Is capable of reciprocating up and down with the rotation of the support member 10, and prints the printed paper 2 conveyed from the upstream side of the conveyance path by interaction with the fixed blade 9 a. Cut along the width direction.

The sorting device 30 places a large number of cut sheets 2 discharged from the discharge port 25 on a separate tray for each order, based on a control signal transmitted from the controller 20 of the ink jet printer 1. By doing so, sort and organize by order.

The controller 20 performs predetermined processing on an image signal supplied from an input interface (not shown), and supplies the signal to the inkjet printing unit 6 as a print signal. Further, the controller 20 supplies a signal for printing a cutting mark on the paper 2 to the ink jet printing unit 6 every time the transmission of the image signal related to one print range is completed, and one or a plurality of signals related to one order. Each time the transmission of the image signal is completed, a signal for printing the sorting mark on the paper 2 is supplied to the inkjet printing unit 6. The signal for printing each mark is subjected to a conversion process for inverting the color density of the position where each mark is printed on the image signal, as described later.

Further, the controller 20 supplies a control signal to the motor 18 based on the output signal from the cutting position detecting unit 8 such that the sheet 2 is cut along the width direction at a position corresponding to the cutting mark. At the same time, based on an output signal from the order detection unit 11, the control device sorts a control signal such that one or a plurality of sheets 2 cut at the position where the cutting mark is printed are sorted with the sorting mark as a boundary. 30.

Next, the operation of the ink jet printer 1 according to the present embodiment configured as described above will be described.
This will be further described with reference to FIGS. FIG. 2 is a schematic diagram illustrating an example of a sheet that has been printed by the inkjet printing unit 6 and has not yet been cut. FIG. 3 is a schematic diagram for explaining a range (detection range) in which a mark can be detected by the cutting position detection unit 8 and the order detection unit 11.

As described above, the paper 2 loaded in the housing 28 is supplied to the motor 1 under the control of the controller 20.
The drive roller unit 7 driven by the drive roller unit 7 unwinds from the winding portion 2a. A dot impact print unit 5 and an ink jet printer are provided on the back surface (lower surface in FIG. 1) and the front surface (upper surface in FIG. 1) of the paper 2 unwound from the winding unit 2a based on a signal supplied from the controller 20. The printing is performed by the printing unit 6, and the printed paper 2 is transported further downstream by the transport roller pair 15.

In the present embodiment, the ink jet printing unit 6 prints a cutting mark (a short line having a width of 0.1 mm or more and inconspicuous to the naked eye) near the widthwise end of each cutting position of the paper 2. A sorting mark (a short line having a width of 0.1 mm or more and invisible to the naked eye, similar to the cutting mark) is printed at the cutting position of the sheet 2 corresponding to the order switching and inside the cutting mark.

When printing an image on the paper 2, a blank portion (edge) where no printing is performed may be provided around the image area, or no blank portion may be provided. Here, the cutting marks and the sorting marks printed on the paper 2 in the case where no margin is provided around the image area and in the case where a margin is provided will be described with reference to FIGS. 2 and 3.

FIGS. 2 (a) and 2 (b) show before and after cutting of the paper 2 on which a plurality of images are printed in each of the case where no margin is provided and the case where a margin is provided around the image area. (A printed matter 31, 32, 3 on which one image is printed by cutting the paper 2)
3 and 34). FIG.
In (a) and (b), a broken line 42 indicates a cutting position, that is, a boundary line between the printed materials 31 to 34. Therefore, this broken line 4
By cutting the paper 2 along 2
The printed matter 31, 32, 33, 34 on which one image is printed is obtained.

When an image is printed up to the upper and lower ends of the sheet 2 and the boundary line 42 without providing a margin around the image area, the color of the cutting mark and the sorting mark is the same color or the same color as the surrounding color. In this case, the cutting position detection unit 8 and the order detection unit 11 cannot detect the cutting mark and the sorting mark, respectively. Therefore, in the present embodiment, the controller 20 controls the control so that the colors of the cutting mark and the sorting mark are sufficiently different in hue, saturation, and brightness from the surrounding colors according to the surrounding colors. Is going. Therefore, according to the ink jet printer 1 of the present embodiment, the omission of detection of the cutting mark and the sorting mark and erroneous detection hardly occur.

For example, as shown in FIG. 2A, a cutting mark 35 printed on a boundary 42 between the printed matter 31 and the printed matter 32 is a position where the cutting mark 35 is printed (an end of the boundary 42).
Since the color of the image around is white, the image is printed in black. On the other hand, the boundary 42 between the printed matter 32 and the printed matter 33 and the boundary 42 between the printed matter 33 and the printed matter 34
The cutting mark 36 printed on the upper side is printed in a white color because the color of the image around the position where this is printed (the end of the boundary 42) is a black color. As described above, the color tone, shading, and the like of the cutting marks 35 and 36 are determined by the cutting marks 3 and 36.
The controller 20 adjusts the colors 5 and 36 according to the density of the color of the image around the print position.

Similarly, the sorting mark 38 printed on the boundary line 42 between the printed matter 31 and the printed matter 32 has a white color around the printing position (inside the cutting mark 35). The sorting mark 3 which is printed in black color and is printed on the boundary 42 between the printed matter 33 and the printed matter 34
9 is the position where this is printed (the cut mark 36 on the right side)
Since the surrounding color of (inside) is a black-based color, it is printed in a white-based color.

On the other hand, when a margin is provided around the image area, the color of the cutting mark and the sorting mark is sufficiently different from the color of the margin (usually white) and is set as a color that can be distinguished from the margin. With this arrangement, the cutting mark and the sorting mark can be detected by the cutting position detecting unit 8 and the order detecting unit 11 even if the colors are always the same. For example, as shown in FIG. 2B, the cutting mark 37 printed at the end of each boundary line 42 is printed in a black color because the margin around the image area is a white color. ing. Similarly, the sorting marks 40 printed on the boundary 42 between the printed matter 31 and the printed matter 32 and on the boundary 42 between the printed matter 33 and the printed matter 34 are also printed in black.

The sorting mark printed on the paper 2 by the ink jet printing unit 6 moves downstream by the transport roller pair 15 and reaches a position facing the order detection unit 11 after passing through the drive roller unit 7. When the sorting mark arrives at a position opposing the sorting mark, the order detecting unit 11 optically detects the sorting mark and transmits a detection signal to the effect that the sorting mark has been detected to the controller 20. The controller 20 that has received the detection signal
Sends a control signal to the sorting device 30 to sort the paper 2 at a position corresponding to the detected sorting mark.

Subsequently, the cutting mark printed on the paper 2 reaches a position facing the cutting position detecting unit 8. When the cutting mark arrives at a position facing the cutting mark, the cutting position detecting unit 8 optically detects the cutting mark and transmits a detection signal to the effect that the cutting mark has been detected to the controller 20. The controller 20 that has received the detection signal transmits a control signal that causes the sheet 2 to be cut along the boundary line 42 at a position corresponding to the detected cutting mark at an appropriate timing, and sends the control signal to the moving blade 9 b of the cutting unit 9. Driving motor 18
Send to

When a signal for printing each mark is supplied from the controller 20 to the ink jet printing unit 6, the detection of each mark can be performed even in an image in which black and white colors are mixed. It is preferable that information relating to a signal for printing each mark is also supplied from the controller 20 to the order detection unit 11 and the cutting position detection unit 8 in order to facilitate the operation.

The order detecting unit 11 and the cutting position detecting unit 8 are reflection type optical sensors.
It has a photodiode (issuing element) and a phototransistor (light receiving element). Therefore, in the order detection unit 11 and the cutting position detection unit 8, each mark is irradiated by the photodiode, the reflected light is received by the phototransistor, and each mark is detected based on a change in the intensity of the reflected light.

In the present embodiment, the cutting position detecting unit 8 is set so as to detect a cutting mark only within a predetermined detection range in the longitudinal direction of the paper 2. When no margin is provided on the paper 2, as shown in FIG. 3A, both ends of the vicinity of the boundary 42 in the longitudinal direction of the paper 2 (adjacent image areas (areas indicated by oblique lines)) The (nearby) region is set in the detection range 45, and the other regions are set in the non-detection range 46. On the other hand, when a margin is provided, as shown in FIG. 3B, an area where no image area (area shaded) is provided in the longitudinal direction of the paper 2, that is, an adjacent image area The margins at both ends are set to the detection range 45,
Other regions are set as the non-detection range 46. The cutting position detecting unit 8 is controlled to be active only during a predetermined time obtained based on the cutting position calculated at the time of printing by the ink jet printing unit 6 and the conveying speed by the conveying roller pair 15. Is a detection range 45, and the other range is a non-detection range 46. The detection range 45 and the non-detection range 46 are preferably stored in advance for each length of the image area.

As described above, in the present embodiment, the order detecting unit 11 or the cutting position detecting unit 8
Detects the sort mark or the cut mark only within the detection range 45, so that even if a mark having the same shape as the sort mark or the cut mark is printed as a part of the image in the non-detection range 46, the order detection unit 11 Alternatively, the cutting position detecting unit 8 does not mistakenly detect it as a sorting mark or a cutting mark. Therefore, it is possible to effectively prevent the sheet 2 from being cut in the image area or being sorted according to an incorrect order.

The motor 18, which has received a control signal for cutting the paper 2 at the position corresponding to the cut mark from the controller 20, moves the movable blade 9 b forward by rotating the support member 10. Thereby, the moving blade 9
The paper 2 sandwiched between b and the fixed blade 9a is cut along the boundary line 42, discharged from the discharge port 25, and supplied to the sorting device 30.

Finally, the printed and cut paper 2 discharged from the discharge port 25 of the ink jet printer 1
The (a plurality of printed materials 31, 32, 33, 34) are sorted and arranged by order based on the control signal transmitted from the controller 20.

As described above, according to the ink jet printer 1 of the present embodiment, the ink jet printing unit 6 prints the cut mark together with the image on the paper 2 and the cut position detecting unit 8 detects the mark. Since the controller 20 controls the cutting unit 9 based on the detection signal, the sheet 2 can be cut along the width direction at a desired cutting position with high positional accuracy without forming a notch or a hole. Thus, it is possible to obtain high-quality printed matter 31, 32, 33, 34 in which a part of the paper 2 is not chipped. Further, the ink-jet printing unit 6 prints a sorting mark on the paper 2 so that the printed matter 31,
32, 33, and 34 can be sorted and arranged by order.

Although a preferred embodiment of the present invention has been described, the present invention is not limited to the above-described embodiment, but is limited to the scope described in the claims.
Various design changes can be made. For example, in the above-described embodiment, the cutting marks 35 to 37 are printed on one end of the printed sheet 2. A cut mark may be printed at the location. In the above-described embodiment, the sorting marks 38 to 40 are the cutting marks 3.
It is printed so as to be arranged adjacent to the inside of 5 to 37, but if it is within the range that can be detected by the order detection unit 11, even if the cut mark is printed on one end opposite to one end of the printed paper Or it may be printed at another location. Further, the size, shape, and shade of color of the cutting mark and the sorting mark may be any as long as they can be detected by the detection units 8 and 11.

It is preferable that each mark is printed on the boundary line 42 so as to be inconspicuous after cutting. However, each mark may be printed at a position other than on the boundary line 42. In this case, it is necessary to control the cutting unit 9 so as to cut at a position separated by a predetermined distance from the cutting mark, and to shift the detection range 45.

In the above-described embodiment, the order detecting unit 11 and the cutting position detecting unit 8 are arranged side by side along the transport direction of the sheet 2, but the order detecting unit 11 and the cutting position detecting unit 8 are May be arranged along the width direction of the paper 2 or may be formed integrally. .

In the above-described embodiment, the order detecting unit 11 and the cutting position detecting unit 8 detect each mark by a reflection type optical sensor. However, any method of detecting each mark can be used. You may. In addition,
If the order detecting unit 11 and the cutting position detecting unit 8 are capable of detecting the length of each mark in the width direction of the sheet 2, each mark can be more reliably identified and detected.

In the above-described embodiment, the sorting device 30 is connected to the outside of the ink jet printer 1, but a mechanism having the same function as the sorting device 30 may be provided inside the ink jet printer. Good.

In the above-described embodiment, the sorting marks are printed together with the cutting marks and the printed matter is sorted by the sorting device 30. However, when it is not necessary to sort by order, the sorting marks are not printed. May be
The sorting device 30 need not be connected.

In the above-described embodiment, the moving blade 9b having a length larger than the width of the paper reciprocates up and down, so that the paper 2 is cut by the interaction with the fixed blade 9a. Although a unit is used, the present invention is applicable to any other cutting unit. For example, the present invention can be applied to a cutting unit of a type in which a disk-shaped movable blade cuts a sheet while rolling on the sheet, and the cutting unit does not necessarily have to have a fixed blade.

In the above-described embodiment, the dot impact printing unit 5 for printing on the back surface of the paper is provided, but the dot impact printing unit may not be provided.

As a print medium in the ink jet printer of the present invention, a thin plastic or the like can be used other than paper.

[0056]

As described above, according to the first aspect, in response to the detection of the first mark printed on the print medium, the print medium that has been printed at a position near the first mark is detected. Since the print medium is cut, the print medium can be cut at a desired position without forming a notch or a hole. Further, since the first mark is printed by an ink-jet printing means for printing an image, and the print medium is cut near the first mark, the cutting position accuracy of the print medium is extremely high. In addition, since another means is not required for attaching the first mark, the apparatus configuration is simple.

According to the second aspect, the color of the first mark can be made sufficiently different in hue, saturation, and brightness from the surrounding colors so that the first mark can be detected with high accuracy. .
This makes it possible to prevent the first mark from being missed or erroneously detected with a high probability.

According to a third aspect, another landmark having the same or similar shape as the first landmark is located at a position relatively long in the longitudinal direction from the first landmark and the print medium should not be cut. Even if it is printed as a part of the first mark, the other mark is not erroneously detected as the first mark, so that the printing medium is placed in the wrong position other than the position near the first mark. Can be prevented with high probability.

According to the fourth aspect, a control signal is output such that the print medium is sorted on the basis of the second mark in response to the detection of the second mark. If the second landmark is printed together with the first landmark, it is possible to sort and arrange the printed print media for each order.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an ink jet printer according to an embodiment of the present invention and a sorting device connected to the outside thereof.

FIG. 2 is a schematic diagram illustrating an example of a sheet that has been printed by an ink jet printing unit of the ink jet printer illustrated in FIG. 1 before cutting.

FIG. 3 is a schematic diagram for explaining a range in which a mark can be detected by a cutting position detecting unit and an order detecting unit of the ink jet printer shown in FIG.

FIG. 4 is a schematic view showing a sheet on which a cutting mark is given by a conventional ink jet printer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ink jet printer 2 Paper 2a Winding part 3 Drum 5 Dot impact printing unit 6 Ink jet printing unit (printing means) 7 Drive roller unit 8 Cutting position detecting unit (first detecting means) 9 Cutting unit (cutting means) 9a Fixed Blade 9b Moving blade 10 Support member 11 Order detection unit (second detection unit) 15 Conveyance roller pair (conveyance unit) 17, 18 Motor 20 Controller (first control unit, second control unit, output unit) 25 Discharge Exit 28 Housing 30 Sorting device 31-34 Printed matter 35-37 Cutting mark 38-40 Sorting mark 45 Detection range 46 Non-detection range

Continued on the front page F term (reference) 2C056 EA30 EB27 EB36 EC06 HA29 2C058 AB15 AC02 AC07 AC11 AD01 AE04 AE08 AF20 AF23 AF51 LA03 LA24 LB09 LB17 LC05 LC26 LC28

Claims (4)

[Claims] 1. A printing means for printing an image on a long printing medium by an ink jet method, a cutting means for cutting the printed printing medium along a width direction, and the printing medium Transport means for transporting the printing means in the direction from the printing position by the printing means to the cutting position by the cutting means, and a first printed on the print medium between the printing position and the cutting position. First detection means for detecting a mark; controlling the printing means so that the first mark is printed on the print medium; and the first mark being detected by the first detection means. And a first control unit for controlling the cutting unit so that the printed print medium is cut at a position near the first mark in response to the detection of the first mark. Ink jet Tsu door printer. 2. The ink-jet apparatus according to claim 1, wherein the first control unit controls the printing unit such that a color of the first mark is changed according to a surrounding color. Type printer. 3. The method according to claim 1, wherein the first detecting unit is configured to determine only a predetermined range in a longitudinal direction of the print medium.
The ink jet printer according to claim 1, wherein the first mark is detected. 4. A method for controlling the printing unit such that a second mark is printed on the print medium at a position close to at least one of the width directions selected from the first mark. 2 control means, 2nd detection means for detecting the second mark printed on the print medium at the downstream side of the printing position, and 2nd mark by the second detection means Output means for outputting a control signal such that one or a plurality of the print media cut at a position near the first mark are sorted by the second mark in response to the detection. The ink jet printer according to any one of claims 1 to 3, further comprising: