JP2017149095A - Printing device and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the convenience of printing when using a perforated sheet.SOLUTION: A printing device can detect the presence/absence of a sheet in a sheet width direction by a sheet presence/absence detection unit (11), feed and back-feed the sheet by a sheet feeding mechanism (23, 24, 25, 26). A printing region setting unit (S100-S196) feeds the sheet by the sheet feeding mechanism (S112), the sheet presence/absence detection unit detects the position where there is no sheet within a range of the sheet width (S132), and detects the position where there are no sheets (S160) to determine the diameter of the hole (S168, S176). When a printing region is set by avoiding the hole (S404-S420), a printing unit performs printing within the set printing region (S196).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a printing apparatus and a printing method, and more particularly to a printing apparatus and a printing method capable of printing on perforated paper.

Loose leaf paper is known as perforated paper. Loose leaf paper has a large number of holes in a row along one long side. When such perforated paper is set in a copier or the like, the paper may not be detected accurately. This is because the sensor that detects the edge of the paper detects the hole as the edge of the paper.
Conventionally, a technique disclosed in Patent Document 1 is known as a technique for preventing a paper hole from being detected as an edge of the paper.

  In Patent Document 1, a response delay time is set in accordance with the document conveying speed, and only openings having a size corresponding to the response delay time or more are detected. For this reason, the hole formed in the loose leaf does not satisfy this condition and is not detected as the edge of the paper.

JP 2011-066666 A

Although the technique disclosed in Patent Document 1 can accurately detect the edge of the paper, even if the edge of the paper can be accurately detected, printing is performed in an area having a hole. Inevitable.
The present invention improves the convenience of printing when using perforated paper.

  The present invention includes a sheet presence / absence detecting unit that detects the presence / absence of a sheet in the sheet width direction, a sheet feeding mechanism that feeds and back feeds the sheet, a sheet that is fed by the sheet feeding mechanism, and a sheet width A print area setting unit that detects a position where there is no paper in the range, detects a position where there is no plurality of sheets, determines the diameter of the hole, and sets a print area while avoiding the hole, and within the set print area And a printing unit for printing with the printer.

  In this configuration, the printing apparatus can detect the presence / absence of paper in the paper width direction by the paper presence / absence detection unit, and can feed and back feed the paper by the paper feeding mechanism. The print area setting unit feeds the paper with the paper feed mechanism, the paper presence / absence detection unit detects the position where there is no paper within the paper width range, detects the position where there are no plural papers, and detects the hole When the diameter is determined and the print area is set avoiding the hole, the printing unit prints within the set print area.

  As described above, since the hole is detected and the diameter is determined, and the print area is set so as to avoid the hole using the result, it is possible to perform printing without being particularly aware of the perforated paper. .

1 is a schematic block diagram of an ink jet printer which is a printing apparatus to which the present invention is applied. 5 is a flowchart illustrating perforated paper detection and printing processing. It is a figure which shows the change of the paper presence / absence signal in the case of the paper without a hole. It is a figure which shows the change of the paper presence / absence signal in the case of perforated paper. It is a figure which shows the change of the paper presence / absence signal in the case of a perforated paper, and pinhole center position specification. FIG. 9 is a diagram illustrating a change in a paper presence / absence signal when paper feeding is started at the center position of a hole in a perforated paper. It is a flowchart which shows a skew confirmation process. It is a figure which shows the paper in which the skew has arisen. It is a flowchart which shows a large diameter hole determination process when there exists skew. It is a figure which shows the change of the paper presence / absence signal when the paper is tilted counterclockwise. It is a figure which shows the change of the paper presence / absence signal when the paper is inclined in the clockwise direction. 6 is a flowchart illustrating print area setting processing. It is a figure which shows the printing area | region of borderless printing. It is a figure which shows the printing area | region of bordered printing. It is a figure which shows the printing area | region of bordered printing in case the skew has arisen. It is a flowchart which shows a layout adjustment process. It is a flowchart which shows a double-sided printing process. It is a figure which shows the setting of the printing area | region in the case of duplex printing. It is a flowchart which shows a printing process. It is a figure which shows the case where the printing which does not back-feed can be implemented.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram of an ink jet printer which is a printing apparatus to which the present invention is applied.
In the figure, a print head 10 ejects four or six color inks supplied from an ink tank from a nozzle. The print head 10 is provided with a paper presence / absence detection sensor 11 using an optical element. The print head 10 is reciprocated within a predetermined range by a belt 22 driven by a carriage motor 21. The paper presence / absence detection sensor 11 is driven to reciprocate within a predetermined range together with the print head 10, and at this time, it is detected whether or not there is a paper at the position where the print head 10 faces. Since the drive position of the print head 10 can be determined separately, it is possible to determine the presence or absence of paper at each position.
As described above, the sheet presence / absence detection unit detects the presence / absence of the sheet in the sheet width direction, and includes the sheet presence / absence detection element (sheet presence / absence detection sensor 11) disposed in the carriage that reciprocates in the sheet width direction. In addition, when the carriage moves in the width direction, the movement position and the detection result of the presence or absence of paper are output.

The platen 23 is driven by a platen motor 24 and conveys paper in response to the reciprocation of the print head 10. The feed motor 25 drives a paper feed roller 26 that supplies paper stored in a predetermined paper stacker. By these, the paper can be fed and back-fed to constitute a paper feed mechanism.
The control circuit 30 is configured by combining dedicated ICs and functionally includes a CPU, a ROM, and a RAM. The control circuit 30 controls driving of the print head 10, the carriage motor 21, the platen motor 24, and the feed motor 25. An operation panel 41 and a display panel 42 are mounted on the control circuit 30. A predetermined operation by a user is received on the operation panel 41 and a predetermined display is performed on the display panel 42.

  A card reader 50 is connected to the control circuit 30, and by loading a detachable memory card, data of the memory card can be read or predetermined data can be recorded. Further, an I / O circuit 60 is connected to the control circuit 30 so that it can be connected to other external devices by wire or wirelessly. The control circuit 30 acquires an image data file from an external device or a memory card, and executes printing by controlling the device based on the data file.

FIG. 2 is a flowchart of perforated paper detection and printing processing performed in the present invention. The CPU in the control circuit 30 executes a program corresponding to this flowchart. Hereinafter, the printing process will be described along the flowchart.
In S100, the CPU moves the carriage to the center position. As a result, the print head 10 moves to approximately the center position of the paper width. In this embodiment, the sheet is set at the center of the sheet stacker, and when the sheet feeding roller 26 feeds the sheet, the sheet is supplied to a position that substantially coincides with the center of the carriage within the range of the left and right reciprocation. become. When the carriage is moved, the CPU starts feeding in S104. As a result, the feed motor 25 rotates and the paper feed roller 26 rotates, so that the paper stored in the paper stacker starts to be fed.

After starting the paper feeding, the CPU starts monitoring the output of the paper presence / absence detection sensor 11 mounted on the print head 10. The paper presence / absence detection sensor 11 emits detection light from the print head 10 side, and detects the presence / absence of paper according to the intensity of reflected light. The output signal is at a high level while there is no paper, and the output signal is at a low level while there is paper.
Until the sheet is fed to the position of the sheet presence / absence detection sensor 11, the output signal of the sheet presence / absence detection sensor 11 remains at a high level. However, when the sheet is fed to the position of the sheet presence / absence detection sensor 11, the output signal of the sheet presence / absence detection sensor 11 changes to a low level, and the edge of the sheet can be detected by this change.

  The CPU waits until a paper edge is detected in S108, and after detecting the paper edge, the CPU starts paper feeding by a predetermined distance in S112. This distance is a sufficient distance to reach a position where a hole will be formed in the assumed perforated paper. For example, in the case of a loose leaf, it is formed from a range within 10 mm from the end of the paper. Similarly, in the case of three holes or two holes, it is formed at a fixed position. Accordingly, the CPU causes the feed motor 25 to perform paper feeding by a distance sufficient to cover the formation position. The sheet feed speed is sufficiently slow, and the CPU starts reciprocation of the carriage in S116 while executing the sheet feed.

While the sheet is fed, the CPU analyzes the sheet presence / absence signal output from the sheet presence / absence detection sensor 11 in S120 while the carriage reciprocates.
FIG. 3 is a diagram illustrating a change in the sheet presence / absence signal in the case of a sheet having no holes.
After the end of the sheet is detected, when the carriage reciprocates, the sheet presence / absence signal is at a low level at a position where the central sheet is present, but the sheet presence / absence signal is at a high level at positions where there are no left and right sheets. Accordingly, the positions where the high level changes to the low level or the low level changes to the high level are the sheet edges OPE1 and OPE2 of the normal sheet OP.

In S124, the CPU detects the paper width from the paper edges OPE1 and OPE2.
Paper width = | OPE1-OPE2 |
It becomes. This is a case where it is detected that there is no paper in the left and right areas and that there is paper in the center area. Next, in S128, the CPU confirms the set paper information. The paper is based on a predetermined standard, and it is confirmed whether the size of each standard matches the detected paper width. For example, if it is A4, the width is 210 mm, and if the detected paper width is approximately 210 mm, it can be determined that A4 paper is supplied. Of course, a predetermined error is allowed.

FIG. 4 is a diagram showing a change in the paper presence / absence signal in the case of perforated paper.
On the other hand, in the case of perforated paper HP, the paper presence / absence signal is at a high level where it is determined that there is no paper in the left and right areas, and the paper presence / absence signal is not present at the position where the hole H is formed within the paper width of the paper. Become high level.
When the carriage moves from left to right on the paper surface, the paper presence / absence signal is initially at a high level, goes low at the left paper edge OPE1, goes high at the left edge OPE3 of hole H, and goes to the right edge of hole H. It goes low at OPE4 and goes high at the right paper edge OPE2.

  In S132, the CPU determines whether the absence of paper is detected within the paper width based on the number of changes in the paper presence / absence signal. In the analysis of the paper presence / absence signal, OPE1 and OPE2, which are the closest positions from the left and right edges, are determined as the paper edges. This can be realized by the CPU detecting the maximum width position as the paper width in S136. As a result, the change during that time is determined to be other than the end of the sheet.

If a change in the paper presence / absence signal other than the paper edge is detected, the CPU identifies the center position of the hole in S140. If no change in the paper presence / absence signal other than the paper edge is detected, normal printing processing may be performed, and the process proceeds to processing for setting a printing area in S188.
FIG. 5 is a diagram showing a change in the presence / absence signal of the sheet and the specification of the center position of the hole in the case of the perforated sheet.
Since the intermediate position between the left end OPE3 of the hole H and the right end OPE4 is the center position OPE5 of the hole H,
OPE5 = | OPE3-OPE4 | / 2
Can be specified. Accordingly, the CPU moves the carriage to the center position OPE5 of the hole H in S144. When the carriage is moved to the center position OPE5 of the hole H, the CPU starts feeding the paper by a predetermined distance to the feed motor 25 in S148, and analyzes the paper presence / absence signal in S152. In the case of loose leaf, when only one type of hole is formed, and when two holes of a total size are formed by forming a large hole at the standard position of two holes There is.

FIG. 6 is a diagram illustrating a change in the paper presence / absence signal when the paper feeding is started at the center position of the hole of the perforated paper.
When the position of the carriage is the center position OPE5 of the hole H and the paper feed is started by the feed motor 25, the paper presence / absence signal becomes high level or low level depending on the presence or absence of the hole H. As shown in FIG. 6, when the upper edge of the small diameter hole HS reaches the position of the paper presence / absence detection sensor 11 of the print head 10, the paper presence / absence signal changes from low level to high level. When the lower edge reaches the position of the paper presence / absence detection sensor 11 of the print head 10, the paper presence / absence signal changes from a high level to a low level. In other words, the position where the sheet presence / absence signal has changed from the low level to the high level is the edge OPE6 above the small-diameter hole HS, and the position where the sheet presence / absence signal has changed from the high level to the low level is the edge OPE7 below the small-diameter hole HS. It can be judged. When small holes HS are lined up, the hole diameter SD is
SD = | OPE6-OPE7 |
It becomes.

However, as shown in FIG. 6, in the case of the large-diameter hole HL, the hole diameter LD is
LD = | OPE8−OPE9 |
Therefore, it is determined that it is larger than SD.
In the analysis of the paper presence / absence signal, the CPU detects the diameter of the hole based on the paper presence / absence signal at S156, and when detecting a plurality of holes at S160, records the plurality of hole diameters at S164. Keep it.

If different diameters are detected after recording the diameters of the plurality of holes, the CPU determines that there is a size in S168. If it is determined that the size is large, the CPU further specifies the center position OPE10 and the diameter LD of the large-diameter hole LH in S172. That is,
OPE10 = | OPE8−OPE9 | / 2
LD = | OPE8−OPE9 |
Can be specified. If the diameters of the plurality of holes are not detected, the process proceeds to S180.

In this case, it is also possible to feed the sheet to the center position OPE10, move the carriage in the sheet width direction, and obtain the diameter LD of the large hole LH based on the sheet presence / absence signal. When the change positions OPE8 ′ and OPE9 ′ of the no-paper signal in the paper width direction are
OPE10 ′ = | OPE8′−OPE9 ′ | / 2
LD ′ = | OPE8′−OPE9 ′ |
On the other hand, if the diameter of the plurality of holes is recorded and the hole diameter SD remains unchanged, the CPU can determine in S176 that the hole diameter has not changed by advancement by a predetermined distance. In this case, the CPU specifies the center position and the diameter of the small-diameter hole in S180, and matches the large-diameter hole with the small-diameter hole in S184.

That is,
OPE10 = | OPE6-OPE7 | / 2
LD = | OPE6-OPE7 |
And The reason why the center position of the small-diameter hole is used as the center position of the large-diameter hole is that the center position and diameter of the large-diameter hole are used when specifying the print area. Can be changed as appropriate.
Thus, when a hole is detected in the paper width direction, the paper presence / absence detection element (paper presence / absence detection sensor 11) is moved to the center position of the hole, the paper is fed, and the hole is detected based on the detection result of the presence / absence of the paper. Is measured (S144 to S184).

After specifying the center position OPE10 and the diameter LD of the large-diameter hole, the CPU sets a print area in S188, back feeds the paper in S192, and sets the start position of the paper in front of the print head 10. In step S196, printing is started.
Prior to the description of the print area and the like, the case of skew (skew) will be described.
FIG. 7 is a flowchart showing the skew confirmation processing, and FIG. 8 is a diagram showing a sheet on which skew has occurred.
If the paper feed roller 26 and the paper edge are supplied in parallel when the paper is fed from the paper stacker, skew does not occur, but a slight shift occurs, so that the edge of the paper is fed to the paper feed roller 26. In some cases, the paper is fed while being in contact with each other at an angle.
If skew does not occur, the positions detected as the sheet edges OPE1 and OPE2 remain constant. If skew occurs, the positions of the sheet edges OPE1 and OPE2 change as the sheet is fed. Usually, the degree of change is the same.

  As described above, the CPU starts paper feeding after detecting the paper edge, and specifies the center position of the large-diameter hole when it is moved by a predetermined distance. The position of the paper edge OPE1 before starting the paper feed is stored, and the position of the paper edge OPE1 at the time when the paper is fed by the same distance a with the predetermined distance as the paper feed distance a is confirmed. If the position of the sheet edge OPE1 is constant, there is no skew, and if it is known that there is a shift by the distance b, it can be determined that there is skew.

This situation can be detected by the following determination by the CPU. In S200, the CPU determines whether there is a change in the position of the sheet edge OPE1. In S204, the CPU specifies a distance b in which the sheet edge has shifted after feeding, specifies a sheet feeding distance a in S208, and calculates a skew angle in S212. In this example, if the skew angle θ is
tan θ = a / b
It becomes.

  If the skew occurs, the paper feed direction and the hole alignment direction are deviated from each other. Therefore, when the paper is fed by moving the carriage to the center position OPE5 of the first detected hole, the holes are gradually formed. It will shift. For this reason, the center position of the large-diameter hole LD cannot always be specified with the processing shown in FIG.

FIG. 9 is a flowchart showing a large-diameter hole determination process when there is a skew.
FIG. 10 is a diagram showing a change in the paper presence / absence signal when the paper is tilted counterclockwise, and FIG. 11 shows a change in the paper presence / absence signal when the paper is tilted clockwise. FIG.
As shown in FIGS. 10 and 11, when skew is generated, the holes are shifted to the left and right. Accordingly, when the diameter of the hole is determined based on the paper presence / absence signal, the diameter of the hole generally decreases. In the example shown in FIG. 10, the diameter of the hole is reduced to 5 mm, 4.9 mm, and 4.8 mm. In the example shown in FIG. 11, the diameter of the hole is reduced to 5 mm, 4.9 mm, and 4.8 mm. It will become. However, the diameter of the hole increases at the position of the large-diameter hole. In the example shown in FIG. 10, the hole diameter changes to 7 mm and 2 mm after reaching 4.8 mm. In the example shown in FIG. 11, the hole diameter changes to 6 after the hole diameter reaches 4.8 mm. .2mm and 4mm. The tendency of the change is slightly different because the center position of the large-diameter hole and the arrangement position of the small-diameter hole are slightly shifted left and right.

The CPU performs the following in the analysis of the paper presence / absence signal when skew is generated.
When it is recognized in S300 that the plurality of recorded hole diameters have a decreasing tendency, the CPU searches for a site where the decreasing tendency has changed in S304. That is, the hole diameter reverses from small to large. If there is such a portion, the CPU determines that the hole has a large diameter in S308. In order to measure the diameter of the large-diameter hole more accurately, the CPU feeds the paper to the center of the large-diameter hole in the paper feed direction in S312, and at the same position, the CPU moves the carriage left and right in S316. Move to and measure the diameter. That is, the change in the sheet presence / absence signal is observed, and the point LD between the points changing from the low level to the high level and from the high level to the low level is set as the diameter LD of the large-diameter hole LH.

Returning to the flowchart shown in FIG. 2, the CPU sets a print area in S188.
FIG. 12 is a flowchart showing print area setting processing.
FIG. 13 is a diagram showing a print area for borderless printing, and FIG. 14 is a diagram showing a print area for bordered printing.
In setting the print area, the CPU uses the large-diameter hole as a reference in S404. The large-diameter hole LH may be specified as the diameter LD with the position where the carriage is moved to the OPE 5 as the center, or may be specified as the diameter LD ′ with the calculated position OPE10 ′ as the center. Since the large-diameter hole is matched with the small-diameter hole in the process of S184, actually, it is possible even if the large-diameter hole and the small-diameter hole are coincident.

The print areas are different for the borderless printing and the bordered printing.
If the CPU determines in S408 that borderless printing is to be performed, in S412 the area up to the inner edge of the large-diameter hole LH is set as the printing area. As shown in FIG. 13, in this case, the position of the left end (OPE5-LD / 2) or (OPE10′-LD ′ / 2) of the large-diameter hole LH is changed from the position of the left end OPE1 of the sheet. Left and right border. The upper and lower boundaries are between the positions from the sheet edge position to the sheet length based on the standard.

On the other hand, if the CPU determines in S416 that printing is to be performed with a border, in S420, the area from the end of the large-diameter hole to the inside of the border is set as the printing area. As shown in FIG. 14, in this case, the left end (OPE5-LD / 2) or (OPE10'-LD '/ 2) of the large-diameter hole LH from the position 3 mm to the right from the left end OPE1 of the sheet. The left and right positions are 3 mm from the left to the right. The upper and lower boundaries are between the position where the sheet is fed 3 mm from the edge of the sheet and the position where the sheet is fed forward 3 mm from the length of the sheet based on the standard.
As described above, the large-diameter hole HL and the small-diameter hole HS are discriminated based on the diameters of the plurality of holes, and the area closer to the center of the sheet than the large-diameter hole HL is set as the print area.
Furthermore, when a large-diameter hole HL is detected or processed so that it can be identified, a predetermined margin is added from the edge of the large-diameter hole HL toward the center of the sheet in the setting of printing with a border. A print area is set (S420), and in the borderless print setting, an area from the edge of the large-diameter hole HL toward the center of the sheet is set as the print area (S412).

If it is determined that skew has occurred as described above, the CPU determines that skew adjustment is necessary in S424, and sets a print area based on the skew information in S428.
FIG. 15 is a diagram illustrating a print area for bordered printing when skew is generated.
In this case, the setting cannot be made uniformly, and the CPU executes a process of shifting the print start position in accordance with the skew direction after feeding the paper by the head width in S432. When the skew is generated, the sheet end OPE1 is shifted by the distance b as the sheet is fed by the distance a. Therefore, the sheet end OPE1 is multiplied by a distance obtained by multiplying the head width c of the print head 10 in the sheet feeding direction by b / a. Move. Of course, since the paper feed distance varies depending on the printing method, the timing of shifting may be changed according to the printing method.
As described above, when the position of the edge of the sheet is changed by the sheet presence / absence detection unit when the sheet is fed (S200 to S208), a printing area corresponding to the skew is set (S424 to S432).
As described above, in the present embodiment, the paper is fed by the paper feed mechanism (S112), the paper presence / absence detecting unit detects the position where there is no paper within the paper width range (S132), and there is no plural paper. The position is detected (S160), the diameter of the hole is determined (S168, S176), and the printing area is set avoiding the hole (S404 to S420). Then, printing is performed within the set print area (S196). These processes correspond to a printing area setting unit and a printing unit.

(Second Embodiment)
In the above-described embodiment, only the print area is set in order to print while avoiding the holes. However, in this embodiment, the print content is also adjusted. This process is a layout adjustment process.
FIG. 16 is a flowchart showing the layout adjustment processing.
If the CPU determines that a hole has been found in S500, the CPU sets a print area in S504, and performs the following layout adjustment based on the print area. In the layout adjustment, either of the options of cutting both ends and the option of reducing can be selected. For characters, the line feed position can be adjusted further.

If the CPU determines in S508 that the image is not a character, it selects a process based on the previously selected option. In S512, both-end cutting is selected, and in S516, both ends are cut in accordance with the print area. On the other hand, in S520, the reduction is selected, and in S524, the image is reduced in the vertical and horizontal directions according to the print area. By doing so, even when the print area is reduced to avoid holes, printing can be performed while avoiding holes, and convenience is improved.
As described above, when the print area that avoids the hole is set (S504), both ends in the width direction of the print image are cut (S512) or the print image is reduced (S524) and printed.

  In the case of characters, the line feed position can be adjusted. If the CPU determines in S528 that the object to be printed is a character, the CPU determines whether adjustment is to be performed by character advancement or adjustment by reduction. These are also selected first. In S532, the character feed is selected. In S536, the line feed position is adjusted in accordance with the print area. In S540, the reduction is selected. In S544, the image is reduced in the vertical and horizontal directions in accordance with the print area. In this way, similarly, it is possible to perform printing while avoiding holes, and it is possible to cope with the reduction of the print area without reducing the size of the character by making it possible to select the character feed.

(Third embodiment)
FIG. 17 is a flowchart showing the double-sided printing process, and FIG. 18 is a diagram showing the setting of the printing area in the case of double-sided printing.
In the case of duplex printing, if the CPU finds a hole before surface printing in S600, it stores the hole position at the time of surface printing in S604. When starting the back side printing, if the CPU determines in S608 that the back side printing is to be performed, before starting the printing, in S612, the CPU reverses the hole position in the width direction of the paper and sets the print area.

As shown in FIG. 18, if a hole is found in the rightmost area during front surface printing, the printing area may be set so as to avoid the leftmost area when performing backside printing. Assume that at the time of front side printing, the printing area starts from a position shifted from the left end to the right by a distance d and ends at a position shifted from the right end by a distance e to the left. At the time of back side printing, the print area is set to start from a position shifted from the left end to the right by the distance e and to end at a position shifted from the right end to the left by the distance d.
As described above, in the case of double-sided printing, the information on the holes determined at the time of front side printing is stored (S604), and the information on the holes stored at the time of back side printing is reversed in the width direction to set the printing area. (S612).

(Fourth embodiment)
In S192 shown in FIG. 2, the paper is fed back to the start end of the paper. However, there are exceptional cases where printing without backfeeding can be performed.
FIG. 19 is a flowchart showing the printing process.
First, the CPU specifies a print start position in S700, and specifies the current paper feed position in S704. Next, in S708, it is determined whether the print start position> the current paper feed position. That is, it is determined whether the print start position is ahead of the current paper feed position.

If the print start position is ahead of the current paper feed position, the CPU feeds the paper to the print start position without back-feeding in S712. On the other hand, if the current paper feed position has been sent before the print start position, the CPU back-feeds to the print start position in S716.
Thereafter, the CPU starts printing in S720.

FIG. 20 is a diagram illustrating a case where printing without backfeeding can be performed.
As shown in the figure, if the print start position f is ahead of the current paper feed position g, the paper is further fed by (g−f) and printing is started. If it is reversed, printing should be started by backfeeding the paper by (f−g).
As described above, when the print start position is located on the paper feed side with respect to the current paper feed position (S704), printing is started without back feeding the paper (S712, S720).

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
-Applying the combination of the mutually replaceable members and configurations disclosed in the above-described embodiments as appropriate-The above-described embodiments are not disclosed in the above-described embodiments, but are publicly known techniques. The members and structures that can be mutually replaced with the members and structures disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art appropriately replaces the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and changes the combination to apply. It is disclosed as.

DESCRIPTION OF SYMBOLS 10 ... Print head, 11 ... Paper presence detection sensor (paper presence detection element), 21 ... Carriage motor, 22 ... Belt, 23 ... Platen, 24 ... Platen motor, 25 ... Feed motor, 26 ... Feed roller, 30 ... Control Circuit 41... Operation panel 42. Display panel 50. Card reader 60. I / O circuit.

Claims (10)

A paper presence / absence detecting unit for detecting the presence / absence of paper in the paper width direction;
A paper feed mechanism for feeding and backfeeding paper,
The paper feed mechanism feeds the paper, the paper presence / absence detection unit detects the position where there is no paper within the range of the paper width, detects the position where there is no plural paper, determines the diameter of the hole, and avoids the hole. A print area setting section for setting a print area,
And a printing unit that prints within the set printing area.   The printing area setting unit discriminates a large-diameter hole and a small-diameter hole based on the diameters of a plurality of holes, and sets an area closer to the center of the paper than the large-diameter hole as a printing area. The printing apparatus according to claim 1.   When the large-diameter hole is detected, in the setting for printing with a border, a printing area with a predetermined margin is set from the edge of the large-diameter hole toward the center of the paper, and in the setting for borderless printing. The printing apparatus according to claim 2, wherein an area from the edge of the large-diameter hole toward the center side of the sheet is set as a printing area.   The sheet presence / absence detection unit includes a sheet presence / absence detection element disposed in a carriage that reciprocates in the width direction of the sheet, and displays a movement position and a detection result of the presence / absence of the sheet when the carriage moves in the width direction. The printing apparatus according to claim 1, wherein the printing apparatus performs output.   The print area setting unit, when detecting the hole, moves the paper presence / absence detection element to the center position of the hole, feeds the paper, and measures the diameter of the hole based on the detection result of the presence / absence of the paper. The printing apparatus according to claim 4, wherein:   The print area setting unit sets a print area corresponding to skew when the position of the end of the sheet changes in the sheet presence / absence detection unit when the sheet is fed. The printing apparatus according to any one of 5.   In the case of double-sided printing, the print area setting unit stores hole information determined at the time of front side printing, and sets the print area by inverting the stored hole information in the width direction at the time of back side printing. The printing apparatus according to claim 1, wherein the printing apparatus is a printing apparatus.   8. The print unit according to claim 1, wherein, when a print area that avoids a hole is set, the print unit cuts both ends in the width direction of the print image or reduces the print image to print. The printing apparatus as described.   9. The printing unit according to claim 1, wherein the printing unit starts printing without back feeding the paper when the print start position is located on the paper feed side from the current paper feed position. The printing apparatus in any one. A printing method of a printing apparatus capable of detecting the presence or absence of paper in the paper width direction and feeding and backfeeding paper,
Feed the paper, detect the position where there is no paper within the paper width range,
Detects the hole diameter by detecting the position where there are not multiple sheets,
Set the print area avoiding the holes,
A printing method, wherein printing is performed within a set printing area.

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