JP2002347229A - Medium printing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the printing quality, shorten the time for printing and prevent vibrations, noises and the like. SOLUTION: There are set a printing position detection process means for detecting a printing position at a set medium, a printing head 35 which is moved at a predetermined moving speed and discharges ink drops by a predetermined timing at a predetermined discharge speed, and a timing correction process means for correcting the timing correspondingly to the printing position. In this case, the timing by which ink drops are discharged is corrected correspondingly to the printing position detected by the printing position detection process means, and therefore an arrival time of ink drops at each printing position can be made equal and the printing quality can be improved. Moreover, since a distance between a leading end of the printing head 35 and a printing face of the medium can be secured fully, a contact between the leading end of the printing head 35 and the printing face is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium printing unit.

[0002]

2. Description of the Related Art Conventionally, a passbook transaction device is installed in a financial institution such as a bank, and a passbook as a medium is set in the passbook transaction device so that a predetermined transaction can be performed. For this purpose, a passbook printing unit as a medium printing unit is mounted on the passbook transaction apparatus. Is set in an open state, in which a plurality of inner sheets on which are printed are bound. Then, a page mark, a printed line (hereinafter, referred to as a “printed line”), etc. of the passbook are detected by a predetermined sensor. The transaction details are printed on an “unprinted line” below.

In an open passbook (two-page spread passbook), every time the number of printed pages increases,
The thickness of one page side and the other page side changes, and accordingly, the distance between the tip of the print head and the printing surface of the passbook changes. Therefore, the timing at which the plurality of print wires of the print head strike the printing surface changes between when printing is performed on one page side and when printing is performed on the other page side. Will drop. In addition, the tip of the print head comes into contact with the thick print surface on the page side, and the print quality deteriorates.

Therefore, a height adjusting mechanism is provided for adjusting the distance between the tip of the print head and the printing surface, and the printing head is moved in a direction perpendicular to the printing surface by the height adjusting mechanism. There is provided a passbook printing unit adapted to be operated.

[0005]

However, in the conventional passbook printing unit, the time required for operating the height adjustment mechanism to place the print head at a predetermined position is lengthened, and printing is performed accordingly. Time becomes longer. In addition, vibration, noise, and the like are generated with the operation of the height adjustment mechanism.

[0006] The present invention solves the problems of the conventional passbook printing unit and can improve the printing quality.
It is an object of the present invention to provide a medium printing unit that can reduce the time for printing and does not generate vibration, noise, and the like.

[0007]

For this purpose, in the medium printing unit of the present invention, a printing position detection processing means for detecting a printing position on a set medium, a printing position detecting means for moving at a predetermined moving speed and a predetermined timing A print head for ejecting ink droplets at a predetermined ejection speed, and timing correction processing means for correcting the timing in accordance with the print position.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing the operation of the passbook printing unit according to the first embodiment of the present invention, and FIG. 2 is a diagram showing an example of printing a passbook according to the first embodiment of the present invention. In the first embodiment, a passbook printing unit as a medium printing unit will be described.

[0010] As shown in FIG.
Is connected to the central processing unit 11 online, and the card / slip control unit 13, the display / operation control unit 1
4. Connected to a passbook control unit 15 as a medium control unit, a bill handling mechanism control unit 16 and the like. And the passbook control unit 1
5 is a magnetic stripe read / write controller 1
7. It is connected to a reading sensor controller 18, a passbook transport controller 19 as a medium transport controller, a printer controller 20, and the like, and controls a passbook process as a media process.

The magnetic stripe read / write controller 17 controls the magnetic stripe reader / writer 22, and the magnetic stripe reader / writer 22
The magnetic head 23 is driven to read magnetic information from a magnetic stripe attached to a passbook P as a medium or write magnetic information to the magnetic stripe. The reading sensor controller 18 controls the sensor moving unit 27 and the reading circuit 25. The sensor moving unit 27 drives the pulse motor 28 to move the reading sensor 26. The output signal is read to detect printing position information, for example, a page mark PM of the passbook P, a printed line mark SM including an * mark as shown in FIG. Then, a printing position detection processing means (not shown) of the reading sensor controller 18 performs a printing position detection process, and executes the page mark PM and the printed line mark SM.
The page and the line to be printed are detected on the basis of the positions such as. The printing position is constituted by the page and the line to be printed.

Further, the passbook transport controller 19 comprises:
The drive unit 31 is controlled, and the drive unit 31 drives the pulse motor 32 to rotate the transport rollers R1 to R6. The printer controller 20 controls a printer driver 33. The printer driver 33 drives a pulse motor 34 to move and scan the inkjet print head 35 in the main scanning direction.
The predetermined print data sent from the passbook control unit 15 is sent to the print head 35, the print head 35 is driven, and ink droplets are ejected from a plurality of nozzles (not shown) of the print head 35 onto the print surface of the passbook P. Let it. for that reason,
The print head 35 includes each nozzle, and an energy-generating element (not shown) such as an electromechanical transducer and a heating resistor disposed in correspondence with each nozzle. Based on the timing, the ink droplets are ejected from the nozzles to the print surface of the passbook P at a predetermined timing to perform printing. Note that 36
Is a passbook insertion slot as a medium insertion slot for setting and removing the passbook P.

Next, the operation of the print head 35 will be described.

FIG. 3 is a perspective view showing a mounted state of the print head according to the first embodiment of the present invention, and FIG. 4 is a view showing a scanning state of the print head according to the first embodiment of the present invention.

As shown in the figure, the carriage 41 is
It is fixed to the belt 45 at the fixing portion 41a, and is moved in the direction of the arrow along the guide shafts 42 and 43 with the driving of the pulse motor 34. A print head 35 is attached to the lower surface of the carriage 41, and an ink cartridge (not shown) is detachably provided on the print head 35. When the carriage 41 is driven by driving the pulse motor 34, the print head 35 is driven.
Is moved together with the carriage 41 and ejects ink droplets from a nozzle (not shown) to the printing surface of the passbook P,
Perform printing. R3 to R6 are transport rollers.

Next, the operation of the print head 35 having the above configuration will be described.

FIG. 5 is a diagram showing the operation of the print head according to the first embodiment of the present invention, and FIG. 6 is a time chart showing the waveform of a print timing signal according to the first embodiment of the present invention.

First, when the passbook P (FIG. 1) is inserted and set in the passbook insertion slot 36, the pulse motor 32 is driven, the transport rollers R1 to R4 are rotated, and the passbook P
Is transported and taken up to the position of the reading sensor 26.
When the output signal of the reading sensor 26 is read, the reading circuit 25 detects a page mark PM, a printed line mark SM, and the like, and the print position detection processing means detects a page and a line to be printed.

By the way, in the passbook P in the opened state, the thickness on one page side and the other page side changes each time the number of printed pages increases, and accordingly,
The distance between the tip of the print head 35 and the printing surface of the passbook P changes. Here, the distance between the tip of the print head 35 and the reference print surface 50 is L0, and the print head 35 that is moved at a predetermined movement speed V at a predetermined timing t0 when the reference print timing signal S1 is turned on. When an ink droplet is ejected at a predetermined ejection speed V0, the ink droplet reaches the printing surface 50 at a point p1.

On the other hand, if the distance between the tip of the print head 35 and the print surface 51 of a predetermined page is L (L <L0), the print head 35 moved at the moving speed V When a drop is ejected, the ink drop is
2, the printing surface 50 is reached. That is, as the distance L becomes shorter with respect to the reference distance L0, the time from when the ink droplet is ejected to when it reaches the printing surface becomes shorter, and the point at which the ink droplet reaches the printing surface is closer to the point p1. .

Therefore, a difference between the timing at which the ink droplet reaches the printing surface 50 and the timing at which the ink droplet reaches the printing surface 51 is calculated, and the difference is defined as an offset amount Δt. The print timing signal S2 is generated with a delay of Δt, the print timing signal S2 is sent to the print head 35, and printing is performed on the print surface 51. When the ink droplet reaches the print surface 50 at the same point p1. The print surface 51 will be reached.

Next, the relationship between the open state of the passbook P and the offset amount Δt will be described.

FIG. 7 is a cross-sectional view showing a state where the first page of the passbook is opened according to the first embodiment of the present invention, and FIG. 8 is an intermediate page of the passbook opened according to the first embodiment of the present invention. FIG. 9 is a cross-sectional view showing a state where the last page of the passbook is opened according to the first embodiment of the present invention. FIG. 10 is a sectional view showing an offset amount table according to the first embodiment of the present invention. It is a figure showing an example.

As shown in FIGS. 7 to 9, the thicknesses d1 to d3 of the passbook P differ depending on the pages and rows to be printed in the passbook P. The distance between them changes. Therefore, a ROM as recording means (not shown) of the printer controller 20 is used.
In the table, an offset amount Δt (0, Δt1, Δt2,...) Is set and recorded in advance in the table in correspondence with the page and the line to be printed. . Therefore, as described above, when a page or a line to be printed is detected, the print timing signal generation processing means and the timing correction processing means (not shown) of the printer controller 20 perform the print timing signal generation processing and the timing correction processing. And reading the offset amount Δt corresponding to the page and line to be printed with reference to the table,
The print timing signal S2 is generated by delaying the print timing signal S1 (FIG. 6) by the offset amount Δt, the print timing signal S2 is sent to the print head 35, and the print head 35 is driven to perform printing. Thus, the timing of the print timing signal S1 is corrected, and as a result, the timing at which the ink droplets are ejected is corrected.

In this embodiment, the table is set in the ROM, but another memory or the like may be used instead of the ROM.

When all the transaction contents have been printed in this way, the passbook P is returned to the passbook insertion slot 36, and the passbook processing is terminated.

In the table of FIG. 10, FIG.
The offset amount Δt of the print timing signal S2 with respect to the print timing signal S1 when the print surface of the intermediate page shown in FIG. For printing on intermediate pages,
The offset amount Δt of the print timing signal S2 is zero (0)
It is. Further, since each page has symmetry about the intermediate page, for example, the offset amount Δt in the 1st to 12th lines of one page and the 13th to 24th
The offset amount Δt in the row is made equal, and the value Δt1
To be. Similarly, the offset amount Δt in the 13th to 24th lines of one page and the offset amount Δt in the 1st to 13th lines of the last page are made equal, and set to a value Δt2.

In this case, since each page has symmetry about the intermediate page, the recording capacity of the table can be halved. Further, in the present embodiment, the passbook printing unit that performs printing on the printing surface from the first page to the last page has been described, but the printing surface of the front cover and the back cover of the passbook P is described. When printing is performed, an offset amount corresponding to the printing surface of the front cover and the back cover is set.

As described above, in the present embodiment, the print timing signal S1 is based on the page mark PM, the printed line mark SM, and the like detected by the reading circuit 25.
Is corrected, the timing at which ink droplets reach the printing surface depends on the case where printing is performed on one page side and the case where printing is performed on the other page side.
That is, the arrival time from when the ink droplet is ejected to when the ink droplet reaches the printing surface becomes equal, so that the printing quality can be improved. Further, a sufficient distance between the leading end of the print head 35 and the thicker print surface on the page side can be ensured, so that the leading end of the print head 35 does not contact the print surface. Therefore, print quality can be improved.

Furthermore, since it is not necessary to adjust the distance between the tip of the print head 35 and the print surface, the time required for printing can be shortened, and vibration and noise are not generated.

In the present embodiment, the offset amount Δt is calculated in advance, set and recorded in a table. However, the offset amount Δt is determined based on the page and line to be printed. Can also be calculated.

In this case, the printer controller 20
The offset amount calculation processing means (not shown) performs an offset amount calculation process, and calculates the arrival time τ0 of the ink droplet by the following equation (1) based on the reference distance L0 and the ejection speed V0. G is the gravitational acceleration.

[0033]

(Equation 1)

Next, the offset amount calculating means includes:
The distance L from the tip of the print head 35 to the printing surface 51 of the passbook P is calculated based on the page mark PM, the printed line mark SM, and the like detected by the reading circuit 25, and the distance L and the ejection speed V0 are calculated. Based on the following equation (2), the arrival time τ of the ink droplet is calculated based on the following equation (2).

[0035]

(Equation 2)

The offset amount calculation processing means calculates the offset amount Δ based on the arrival times τ0 and τ.
Calculate tΔt = τ0−τ.

The distances L0 and L are determined from the distance LA between the transport surface of the transport path for transporting the passbook P and the tip of the print head 35. Based on d, it can be calculated by equations (3) and (4).

L0 = LA-d (3) L = LA-d (4) Next, a second embodiment of the present invention will be described.

FIG. 11 is a block diagram showing the operation of the medium printing unit according to the second embodiment of the present invention, and FIG. 12 is a diagram showing the configuration of the storage of the medium according to the second embodiment of the present invention.

As shown in the figure, the main body control unit 12 of the medium printing unit executes the central processing unit 11 online.
As well as to the medium control unit 61 and the like. The medium control unit 61 includes a hangar control unit 62,
It is connected to the medium transport unit 63, the print control unit 64, and the like, and controls all of the control of taking out passbooks and certificates as storage media from the storage, and the issuing control such as print processing.

As shown in FIG. 12, a passbook P is stored in the hangar from which the hangar is controlled by the hangar control unit 62.
, PN and certificates Q1, Q2, ..., QM,
For example, it is stored separately for each type of passbook (in FIG. 12, a general account, a savings account, etc. are represented as general, ordinary, etc.) and for each type of certificate (period, due date, etc.).

The print control unit 64 comprises the printer controller 20 (FIG. 1) and the printer driver 33, and includes passbooks P1, P2,..., PN, certificates Q1, Q2,.
The control for printing the transaction information on the QM or the like is performed, the pulse motor 34 is driven to move the ink jet type print head 35 in the main scanning direction to scan, and the print data sent from the passbook control unit 15 is printed. To the print head 35 to drive the print head 35 and pass ink drops P1, P2,... From a plurality of nozzles of the print head 35.
PN, certificates Q1, Q2,...

The medium transport section 63 comprises a medium transport controller (not shown) and a drive section 31, drives the pulse motor 32, and outputs passbooks P1, P2,.
1, Q2, ..., QM, etc.

.., PN, certificates Q1, Q2,..., QM, etc., not shown in the medium transport section 63 (FIG. 11), the reading sensor 26 (FIG. 1). ) And the like are provided, so that not only the page turning is enabled by the page turning mechanism, but also the page and line to be printed can be detected.

The hangar control unit 62 stores the passbooks P1, P2,..., PN, certificates Q1, Q2,
.. Has individual data for each QM or the like. When storing the passbooks P1, P2,..., PN, certificates Q1, Q2,.
P2,..., PN, certificates Q1, Q2,..., QM, etc.), the first representing the length, width and thickness of the medium
And the second medium information representing the subject and the page configuration in the passbook are stored as storage information in a ROM or a RAM (not shown) as recording means of the medium control unit 61.

Next, the operation of the medium printing unit having the above configuration will be described.

FIG. 13 is a view for explaining the transport state of a medium according to the second embodiment of the present invention, and FIG.
It is a figure showing an example of a table of the amount of offset in an embodiment.

First, a passbook P to be issued by a customer or a teller
1 (FIG. 12), P2,..., PN, certificates Q1, Q2,.
When QM or the like is selected, medium detection processing means (not shown) of the medium control unit 61 (FIG. 11) performs medium detection processing and selects the selected passbooks P1, P2,..., PN, certificates Q1, Q2,
,…, PN, certificates Q1, Q2, passbooks P1, P2,.
The medium is detected by determining whether QM or the like is stored. Then, the medium transport unit 63
, PN, certificates Q1, Q2,..., QM, etc. selected from the hangar, and are conveyed to the medium printing unit provided with the print head 35.

When printing is performed on the print surface of the passbook cover or the back cover, or when printing is performed on the print surface of the certificate, if the medium is different, the leading end of the print head 35 and the medium are printed. The distance from the printing surface changes. Therefore,
A table as shown in FIG. 14 is set in the ROM, and an offset amount Δri (i = 1, 2,...) Is set in the table for each passbook stored in each storage # 1 to #k.
k) is recorded, and the offset amount Δsi (i = 1, 2,..., k) is recorded for each certificate stored in each of the storages # 1 to #k. Therefore, as described above, when the selected medium is conveyed to the medium printing unit, a print timing signal generation processing unit (not shown) of the print control unit 64 performs a print timing signal generation process and refers to the table. , Offset amounts Δri, Δ corresponding to the selected medium
, and a print timing signal is generated by delaying the reference print timing signal by the offset amounts Δri and Δsi, and the print timing signal is output to the print head 3.
5 to drive the print head 35 to perform printing.

In this embodiment, the printing timing signal for printing on the printing surface of the medium having the largest light emission amount is used as the reference printing timing signal, and the offset amount in the reference printing timing signal is set to zero. And

For example, when the medium is a passbook,
After the printing on the printing surface of the cover is completed, the page is usually turned over, printing is performed on the printing surface of one page, and then printing is performed on the printing surface of two pages. In this case, the table of FIG. 10 set in the first embodiment is referred to, and the print head 35 determines the print head 35 based on the offset amount Δt of the print timing signal for performing printing on the page and the line to be printed. Driven.

As described above, in this embodiment, the timing of the print timing signal is corrected based on the selected medium, and the arrival times of the ink droplets are equalized, so that the print quality can be improved. . Further, a sufficient distance between the tip of the print head 35 and the printing surface of the medium can be ensured, so that the tip of the print head 35 does not contact the printing surface. Therefore, print quality can be improved.

Furthermore, since it is not necessary to adjust the distance between the tip of the print head 35 and the print surface, the time required for printing can be shortened, and vibration and noise are not generated.

Next, the stroke of the carriage 41 (FIG. 4) will be described.

FIG. 15 is a diagram showing the stroke of the carriage.

In the drawing, 35 is a print head, 41 is a carriage, and an acceleration / deceleration area is provided at both ends in the stroke of the carriage 41, and a constant speed area is provided at the center.

By the way, in order to shorten the processing time when printing, the print head 35 is driven while moving in the direction of the arrow shown in FIG. Otherwise, the print quality will be degraded. Therefore, the acceleration / deceleration area is sufficiently widened so that the print head 35 can be moved at a uniform moving speed V in the constant speed area.

However, in this case, it is necessary to secure a sufficient stroke of the carriage 41, and the medium printing unit becomes large. Further, in order to widen the acceleration / deceleration area, the constant-speed area is narrowed accordingly, and a sufficient printable range cannot be secured. Therefore, it is conceivable to eject ink droplets in the acceleration / deceleration area.

Then, in order to shorten the processing time, the printing is completed according to the printable range, the print head 35 is stopped, and the print head 35 is moved to the print start position of the next print line. When printing is performed, the carriage 41 is also accelerated and decelerated when the print head 35 is stopped and then moved to the print start position of the next print line. In such a case, since the moving speed V of the print head 35 changes, the print quality deteriorates.

When performing reciprocal printing, the print head 3
The movement speed V of the print head 35 changes due to the influence of the belt 45 (FIG. 4) in the forward path and the return path 5, and accordingly, the arrival point of the ink droplet changes, and the print quality deteriorates.

Next, a description will be given of a third embodiment of the present invention in which the print quality does not deteriorate as the moving speed V of the print head 35 changes. In addition,
The structure according to the present embodiment is the same as the structure according to the second embodiment, and will be described with reference to FIG.

FIG. 16 is a time chart showing a waveform of a print timing signal according to the third embodiment of the present invention.

In this case, a table in which the offset amount is set in advance in accordance with the acceleration of the print head 35 (FIG. 11) is set. Then, a table in which the offset amount is set corresponding to the traveling direction of the print head 35 is further set.

Therefore, the print timing signal generation processing means (not shown) of the print control unit 64 performs a print timing signal generation process, and sends a reference print timing signal to the print head 35 in the constant speed area.
5 is driven to perform printing, the offsets Δu1, Δu2,... Corresponding to the acceleration of the print head 35 are read in the acceleration / deceleration area, and the offsets Δu1, Δu2 with respect to the reference print timing signal. ,
.. To generate a print timing signal, and sends the print timing signal to the print head 35 so that the print head 3
5 to perform printing. When performing reciprocal printing,
The print timing signal generation processing means includes a carriage 4
In the outbound or inbound path 1, the offset value corresponding to the traveling direction of the print head 35 is read, and a print timing signal is generated by delaying the reference print timing signal by the offset amount. Is sent to the print head 35, and the print head 35 is driven to perform printing.

Whether the carriage 41 is traveling in the constant speed area or whether the carriage 41 is traveling in the forward path or the return path is determined based on the current supplied to the pulse motor 34.

As described above, in the present embodiment, the timing of the print timing signal is corrected based on the traveling direction or acceleration of the print head 35 and the arrival times of the ink droplets are equalized, so that the print quality is improved. Can be done.

Further, since printing can be performed in the acceleration / deceleration area, it is not necessary to make the acceleration / deceleration area sufficiently large. Then, the moving amount of the print head 35 outside the area of the medium can be reduced. Therefore, it is not necessary to secure a sufficient stroke of the carriage 41,
The medium printing unit can be reduced in size. In addition, since printing can be performed in the acceleration / deceleration area, a sufficient printable range can be secured.

Then, the timing of the print timing signal is corrected based on the traveling direction of the print head 35, and the arrival times are made equal, so that the moving speed V of the print head 35 changes due to the influence of the belt 45 (FIG. 4). Can be prevented. Therefore, since the arrival point of the ink droplet does not change, the print quality can be improved.

Incidentally, in the second embodiment,
The medium is detected based on the first and second medium information, and the timing of the print timing signal is corrected based on the offset amount set for each medium.
If the first and second media information cannot be used,
For example, when printing on a medium inserted from outside the media transaction apparatus other than the medium ejected from the storage, the medium is detected based on customer data such as a magnetic stripe (not shown) and the detected medium is detected. The offset amount can also be calculated based on the media used.

The present invention is not limited to the above embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0071]

As described above in detail, according to the present invention, in a medium printing unit, a printing position detection processing means for detecting a printing position on a set medium,
Moved at a predetermined moving speed, at a predetermined timing,
The printing apparatus further includes a print head that discharges ink droplets at a predetermined discharge speed, and a timing correction processing unit that corrects the timing in accordance with the print position.

In this case, the timing at which the ink droplets are ejected is corrected in accordance with the printing position detected by the printing position detection processing means, so that the arrival time of the ink droplet at each printing position can be made equal. And the print quality can be improved. In addition, a sufficient distance between the tip of the print head and the print surface of the medium can be ensured, so that the tip of the print head does not contact the print surface. Therefore, print quality can be improved.

Furthermore, since it is not necessary to adjust the distance between the tip of the print head and the print surface, the time required for printing can be shortened, and vibration and noise are not generated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an operation of a passbook printing unit according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of printing a passbook according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a mounted state of a print head according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a scanning state of a print head according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating an operation of the print head according to the first embodiment of the present invention.

FIG. 6 is a time chart illustrating a waveform of a print timing signal according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state where the first page of the passbook is opened according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a state where an intermediate page of the passbook is opened according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a state where the last page of the passbook is opened according to the first embodiment of the present invention.

FIG. 10 is a diagram illustrating an example of an offset amount table according to the first embodiment of the present invention.

FIG. 11 is a block diagram illustrating an operation of a medium printing unit according to the second embodiment of the present invention.

FIG. 12 is a diagram illustrating a configuration of a storage of a medium according to the second embodiment of the present invention.

FIG. 13 is a diagram illustrating a state of transporting a medium according to a second embodiment of the present invention.

FIG. 14 is a diagram illustrating an example of an offset amount table according to the second embodiment of the present invention.

FIG. 15 is a diagram illustrating a stroke of a carriage.

FIG. 16 is a time chart showing a waveform of a print timing signal according to the third embodiment of the present invention.

[Explanation of symbols]

 18 Print position detection processing means 20 Printer controller 35 Print head 61 Medium control unit P, P1, P2,..., PN passbook Q1, Q2,. Δu1, Δu2, ... offset amount

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshihiro Tahu 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. F-term (reference) 2C056 EA01 EA18 EB13 EB36 EB45 EB59 EC07 EC37 3E040 AA01 AA04 AA06 AA07 BA07 BA16 CB04 FG04 FH05 FK05

Claims (4)

[Claims] (A) a print position detection processing means for detecting a print position on a set medium; and (b) ink at a predetermined timing and at a predetermined discharge speed which is moved at a predetermined moving speed. A print head for discharging droplets,
(C) a medium printing unit, comprising: timing correction processing means for correcting the timing in accordance with the printing position. 2. The medium printing unit according to claim 1, wherein the timing correction processing means corrects the timing according to a preset offset amount of the print timing signal. 3. The medium printing unit according to claim 1, wherein the timing correction processing means corrects the timing in accordance with an offset amount of a print timing signal calculated based on the print position and the ejection speed. 4. A medium detection processing means for detecting a selected medium, and (b) being moved at a predetermined moving speed,
A medium printing unit comprising: a print head that discharges ink droplets at a predetermined timing and at a predetermined discharge speed; and (c) timing correction processing means that corrects the timing corresponding to the medium. .