JPH0542730A - Positioning mechanism of printing sheet - Google Patents

Abstract

PURPOSE:To determine a position for a printing sheet accurately when a power supply is turned ON. CONSTITUTION:Specified items are printed in a printing sheet BC drawn out of a web BB using a means for printing data 9, then the sheet is out off from the web and discharged using a means for cutting 10. In a printing device which performs the above processes, are provided a means F for sending a sheet BC drawn out to a feed path O in a forward or a backward direction and a positioning sensor 8 which is arranged in the upstream position of a means for printing 10 where the feed path O is provided and detects a mark formed on the sheet and outputs a signal for determining the position of the sheet in the path O. If a power supply for the printing device is turned ON, the means F for sending a sheet is driven backward so that the sheet is sent back to a position where the sensor 8 at least detects the mark Bd. After the sensor 8 detects the mark, the means F is driven forward to send the sheet to a specified position. These movements of the means F for sending the sheet are controlled by a control device 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing paper positioning mechanism in a printing apparatus which prints required items on a printing paper drawn from a roll paper and then cuts the printing paper to a predetermined length and discharges it.

[0002]

2. Description of the Related Art An automatic transaction machine such as an ATM or a CD is provided with a printing device, that is, a receipt issuing device, which prints out and displays a transaction content such as cash withdrawal, deposit and remittance. As a printing method,
A heat-sensitive method or a thermal transfer method is used, and the contents are printed while unrolling the roll paper for receipt rolled up at each transaction, and after printing the specified items, cut it to a specified length. And then issue it. One way to issue receipts quickly is to stop the printing part of the printing paper on standby at a position corresponding to the printing means, and deal with the input of print signals without waiting time. You can

[0003]

By the way, when a new roll paper is set, the head of the printing paper is positioned at a predetermined position, so that it does not matter so much. There is a problem that a power failure during operation or when the power is inadvertently turned off and then started up, the leading end position of the printing paper is moved from a predetermined position. If you print with this situation occurring,
Printing is performed at a position deviating from the predetermined printing position on the receipt, and the receipt is not formatted.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing paper positioning mechanism which ensures that the printing paper is positioned at a predetermined position when the printing device starts its operation.

[0005]

The printing paper positioning mechanism of the present invention prints the required items on the printing paper pulled out from the roll paper by the printing means, and then cuts the printing paper for a predetermined length by the cutting means. In a printing device that cuts and discharges a sheet into a sheet, the sheet feeding means is provided so as to be able to feed the printing sheet pulled out to the sheet feeding path in the forward and reverse directions, and the sheet feeding means is provided at an upstream position of the printing means provided in the sheet feeding path. In addition, the position sensor which detects the mark formed on the printing paper pulled out from the roll paper and outputs a signal for determining the position of the printing paper in the paper feeding passage, and the power supply of the printing apparatus are turned on. At this time, the paper feeding means is reversely driven so that the printing paper is fed back to a position where the positioning sensor detects at least the mark, and After the service has detected the above-mentioned mark,
A control device for controlling the paper feeding means so as to feed the printing paper to a predetermined position by driving the paper feeding means in the normal direction.

[0006]

When the printing operation is performed, the printing paper is pulled out from the roll paper by the paper feeding means, and when the positioning sensor detects the mark, the paper feeding means sends the leading end of the printing paper to a predetermined position and then Stop the feeding action. When the power is turned off during the printing operation, the printing paper is placed at the position where the leading end of the printing paper has moved from the predetermined position. When the power of the printing device is turned on, the paper feeding means
After the print paper is fed backward by a length equal to or longer than the length of the mark on the print paper detected by the position sensor, the print paper is fed again in the forward direction and stopped at a predetermined position fed by a predetermined length from the mark position. This cueing operation of the print sheet is executed every time the power is turned on, regardless of whether the sheet is in the predetermined position.

[0007]

The present invention will be described in detail below with reference to the illustrated embodiments. In FIG. 9, a main part of the automatic transaction machine 1 will be described. When a magnetic card is inserted from the card insertion slot 2, the card processor 3 can read the magnetic record. When collation of the personal identification number or the like input from a button group (not shown) is completed, transaction operations such as deposit, withdrawal, and remittance are performed by button operation. When the transaction operation is completed, the magnetic card C is sent out from the card insertion slot 2, and at the same time, the receipt B is also discharged from the card insertion slot 2 and issued. The receipt issuing device 4 as a printing device is arranged above the card processing unit 3 configured by a well-known card reader. Since the card insertion slot 2 also serves as the receipt ejection slot, the “card insertion slot” is hereinafter referred to as the “receipt ejection slot 2”.

In the case of the example shown in FIG. 2, the receipt B is a title of "usage statement", a financial institution name Ba, a message Bb, and transaction contents Bc printed by a printing means described later.
And a black mark Bd is formed as a signal source for determining the print start position and the pull-out end stop position. The receipt B is issued by unrolling the roll paper BB wound in a roll shape and cutting it at the perforation Be formed at a predetermined position. Through holes Bf and Bf for binding the issued receipt B are formed in the roll paper. One of the through holes Bf is formed at a position overlapping the mark Bd.

The printing paper BC refers to a continuous portion of paper that is pulled out from the roll paper BB, and the receipt B refers to a single sheet that is cut off from the perforations.

Referring to FIG. 1, a receipt issuing apparatus will be described as a printing apparatus that employs the printing paper positioning mechanism of the present invention. A roll paper BB is rotatably arranged at a substantially central portion of the apparatus. The roll paper BB is rotatably held by a holding mechanism (not shown), and its lower end peripheral surface is placed on the feed belt 5. The feed belt 5 is wound around belt rollers 5a and 5b, and is rotationally driven in the forward and reverse directions by a paper feed system drive motor M1.

An actuator 6a of a roll paper remaining amount sensor 6 is in contact with the peripheral surface of the roll paper BB to detect the remaining amount from the diameter of the roll paper. A spare roll paper BA is provided behind the roll paper BB, and when the roll paper BB runs out, the spare roll paper B
A is automatically moved to the position of the roll paper BB.

When the feed belt 5 is rotated in the normal direction, the printing paper BC drawn from the roll paper BB (see FIG. 2) is
The roll paper is unwound by being drawn out to the paper feed passage O. In the paper feed passage O, a feed roller pair 7 for nipping the print paper pulled out from the roll paper by the feed belt 5 and feeding the paper at a constant speed, a leading end of the drawn print paper and a mark Bd are provided. A positioning sensor 8 for detecting, a printing means 9 for printing the message Bb and the transaction content Bc on the printing paper, and a cutting means 10 for cutting the printing paper at the perforation Be to separate it as a receipt B are arranged. It is set up.

The feed roller pair 7 is precisely controlled by a drive motor M1 and is driven to rotate in the forward and reverse directions. The paper feed means F is constituted by the feed belt 5 and the feed roller pair 7 including the drive motor M1. Details of its operation will be described later.

The printing means 9 comprises a print head 9a and a platen roller 9b for pressing the print paper against this head. In the illustrated example, since thermal paper is used as the print paper, a thermal head is used as the print head 9a. The cutting means 10 has a drum-shaped cut roll 10a whose central portion in the axial direction has the largest diameter, and this roll is fixedly provided.

A receipt discharging means D is arranged between the terminal end Oa of the sheet feeding passage O and the receipt discharging port 2 to form a receipt discharging passage P. The receipt discharge means D is composed of a discharge belt 11 wound around belt rollers 11a and 11b, pinch rollers 12 and 13 abutting on the belt, and a discharge system drive motor M2. As will be described later in detail, the printing paper BC unwound from the roll paper BB has its leading edge BCa before printing operation.
(See FIG. 3 (a)) is positioned on the cut roll 10a, and when the printing operation is completed, the perforation Be (see FIG. 2) at the boundary with the next print sheet is moved to the position corresponding to the cut roll 10a. It can be stopped.

When the receipt discharging means D is rotationally driven while the feed roller pair 7 is stopped, the leading print sheet is cut from the perforations, and the receipt discharging port 2 as the receipt B.
Published by.

The receipt discharge passage P is provided with a discharge passage sensor 14 for detecting a receipt fed into the discharge passage and a receipt forgetting sensor 15 for detecting a receipt facing the receipt discharge port 2. ing.

Above the printing means 9, a receipt collecting means E for collecting receipts is arranged. The receipt collecting means E has a receipt collecting passage Q branched from the discharge passage P, a collecting belt 17 abutting against the discharging belt 11, and a belt roller 16 around which the belt is wound.
a and 16b, a pinch roller 18, a tray 19 for storing collected receipts, and a collection receipt presence / absence sensor 2 for detecting whether or not there are collected receipts in the trays.
0, a near-full sensor 21 that detects whether or not there is room to store a receipt to be collected, and a collection path sensor 22 that is disposed in the receipt collection passage Q and that detects whether or not there is a receipt in the passage. Is becoming The recovery belt 17 is the discharge belt 11 driven by the discharge system drive motor M2.
It is driven to rotate together with.

The signals from the above-mentioned sensors are input to the controller 16 which is a microcomputer. The controller 16 outputs a signal for rotating the motors M1 and M2 forward and backward based on the signals input from the sensors, and the printing unit 9.
It outputs a signal for activating, but the effect of this will be clarified in the explanation of each mode.

The operation of the embodiment configured as described above will be described for each mode. "Paper cueing mode" (see FIG. 5) In this mode, when the roll paper BB is set at a predetermined position, the roll paper BB is rotated to pull out the print paper BC from the roll and the leading edge BCa thereof to a predetermined position. This is the mode for sending.

When the roll paper BB is set to the holding position shown in FIG. 1, the control device 16 activates the drive motor M1 to drive the feed belt 5, the feed roller pair 7, and the platen roller 9b in the normal direction. When the feed belt 5 rotates forward in the direction indicated by the arrow, the roll paper BB placed on the feed belt 5 is rotated, and the paper edge is picked up by a guide member (not shown) and pulled out. When the leading end of the printing paper unwound from the roll paper is clamped by the feed roller pair 7 and fed, the position sensor 8 detects the leading end of the receipt paper at the timing "a" and the mark Bd at the timing "b". To detect. The drive motor M1 is stopped when w steps have passed since the mark trailing edge detection of the sensor 8 has elapsed.

As shown in FIG. 3A, the drive motor M1
Is stopped and the feed roller pair 7 is stopped, the feeding operation of the printing paper BC is stopped, and the leading edge BCa of the drawn printing paper is the lower circumference of the cut roll 10a located at the distance L2 from the sensor position. The transaction content Bc (see FIG. 2) is located on the surface, and the leading end R of the printed portion is the print head 9.
It is made to face a. At this time, the rear end of the mark Bd is placed at the position of the distance L1 from the position sensor 8.

By executing the cueing mode of the print paper BC, the front end of the print portion (Bc) of the print paper is positioned at the print position. After that, the preparation for receipt receipt operation is ready. .. When this mode is executed, the discharge system and the recovery system are stopped.

"Printing / Discharging Mode" (see FIG. 6) This mode is a mode in which predetermined items are printed on the printing paper BC and the printed printing paper is cut and discharged as a receipt B. When the transaction operation of the automatic transaction machine is performed, a predetermined matter is printed on the printing paper BC having the printing position Bc positioned on the print head 9a. This printing operation is executed while the feed roller pair 7 feeds the printing paper stepwise. At this time, the ejection system drive motor M2 is also turned on, and the leading end portion of the paper fed into the receipt ejection path P is reached. Are conveyed by the receipt discharging means D. The leading edge of the printing paper sent into the discharge path P is the exit path sensor 14
Is detected at timing "C".

On the other hand, when the mark Bd of the next printing paper which is sent while being printed is detected by the positioning sensor 8 at the timing "(B)", the timing "W" after the passage of w steps from this detection is detected. D ", the drive motor M1 is stopped. When the drive motor M1 stops, the unwinding from the roll paper BB is stopped. At this time, the leading edge of the next sheet (rear sheet) is located on the outer periphery of the lower portion of the cut roll 10a. Even if the feed roller pair 7 is stopped, the printed printing paper (leading paper) is fed by the discharge belt 11 and the pinch roller 12 of the receipt discharging means D, so that the leading paper is positioned on the cut roll 10a. It is cut from the perforation Be of the part that is doing.

The receipt B separated from the printing paper is
The trailing end is detected by the discharge path sensor 14 at the timing "e". The drive motor M2 is stopped after y steps from the trailing edge detection "e" of the receipt. Before the trailing edge of the receipt is detected by the discharge path sensor 14, the leading edge of the receipt is detected by the forget-to-remove sensor 15 at timing “G”. When the discharging operation for the receipt is stopped, the leading end Bh of the receipt is exposed to the outside of the machine through the paper discharge port 2, and the trailing end of the receipt is the discharge belt 11 and the pinch roller 1.
It is put in a state of being held by 3.

If the receipt is pulled out from the discharge port 2 before the time t has elapsed after the receipt discharging operation is stopped at the timing "F", this is the forget-to-take sensor 1.
5 is detected at the timing "HI". This time t is set to the time required for the user to receive the issued receipt without delay, and is for avoiding the receipt forgotten by the next user.

"Forced collection mode" (see FIG. 7) In this mode, the power is turned off due to an unexpected power failure while the printer is operating, the power is turned off carelessly, or the leading edge of the printing paper is moved. If the power is turned on after that, that is, the printing operation on the printing paper is halfway done, it is not possible to eject the double-printed receipt (details will be described later). In this mode, the first receipt immediately after such a situation will be forcibly collected without being discharged.
The timing up to "d" in FIG. 7 is the same as the timing "d" in FIG.

The positioning operation of the printing paper before the receipt is discharged will be described with reference to FIGS. 3 and 4. The position of the printing paper BC when the power of the printing device is turned off is shown in FIG.
As shown in (a), the predetermined position at which the first cue is made,
As shown in FIG. 3B, the tip BCa has the cut roll 10
It is roughly divided into an overrun position located in front of a. FIG. 3B shows a state in which the power is turned off and stopped when at least one line of text is printed at the printing position (transaction content Bc). From the predetermined position shown in FIG. Also indicates a position advanced by a distance a.

Even when the printing paper BC is pulled back toward the roll paper BB, the front end BCa is separated from the lower part of the cut roll 10a, but in this case, the amount of paper returned is different. ) The same processing as that in the predetermined position is performed.

In FIG. 4, when the power of the printing device is turned on, the control device 16 activates the drive motor M1 to rotationally drive the feed roller pair 7 of the paper feeding means F in the reverse direction indicated by the broken line arrow. A paper returning operation is performed in which the print paper BC placed at the position shown in FIG. 3A or 3B is sent back in the direction of the broken arrow.

The positioning sensor 8 monitoring the mark Bd of the returned printing paper is "black" (the mark Bd has a hole B
f is formed, the sensor detects whether it is black or not).
This means that the tip is returned to the vicinity of the sensor 8. As shown in FIG. 3C, the control device 16 to which the signal of the sensor 8 that has detected “black” due to the mark and the hole is input, has a predetermined length ((m) + (m) + (m). Only m + α), and further reverse feed. Therefore, the printing paper BC is shown in FIG.
As shown in (c), the mark Bd portion is fed back from the sensor 8 to the retracted position. The control device 16 stores the return amount of the print paper from the start of the return to the end of the return by an appropriate counting means.

The printing paper fed back by a predetermined length is then fed by the feed roller pair 7 which is rotationally driven in the positive direction shown by the solid line arrow in FIG. 3 (c). The mark of the printing paper BC sent in the forward direction is detected by the positioning sensor 8, and when "mark is present" is detected, the control device 16 to which this signal has been input receives w steps from the rear end of the mark (see FIG. 5). Execute "positioning feed" to feed the paper only.

In this positioning feed, as shown in FIG. 3A, the leading edge BCa of the printing paper BC is cut by the cutting roller 10.
It is located in the lower order of a. The control device 16 includes
The signal of the feed amount of the printing paper required for this positioning feed is fetched.

Now, as shown in FIG. 3A, when the printing paper which has not been printed and has been placed at a predetermined position is returned and positioned again, printing is performed on this paper. There is no problem if issued as a receipt.
However, as shown in FIG. 3B, double printing is not preferable if printing is performed again on the printing paper that has already been printed, even if it is only one line.

Therefore, when the "positioning feed" is completed, the control device 16 obtains the difference between the return amount and the feed amount of the loaded sheet, and compares this difference with the length A for one printing line. If this difference is smaller than the length A corresponding to one line of printing in the paper feed direction, the leading edge of the printing paper before being returned should have been positioned on the cut roll 10a, or the leading edge should be positioned before this roll. Even if the roll is overrun or the roll is overrun, the amount is smaller than one line of printing. Therefore, since this printing paper has not been printed yet, the predetermined position shown in FIG. Then, the positioning operation for the sheet is completed.

Next, in FIG. 4, when the difference between the return amount and the feed amount is larger than the length A, the one-sheet scrap processing is executed and the processing ends. That is, as shown in FIG. 3B, when the print position Bc is partially printed, the return amount of the print paper BC is the amount of the print that has been printed and sent to the predetermined position. Since it is larger than the amount, it is judged that the processing is scrap ticket processing.

Explaining the scrap ticket processing, the control device 16 which has judged that the scrap ticket processing should be carried out is driven by the drive motor M1.
Is activated to operate the paper feeding means F to feed the first printing paper toward the receipt discharging means D. At this time, the drive motor M2 is also turned on. Then, as shown in FIG. 6, when the mark of the succeeding printing paper is detected at the timing "b", it is fed by step w from this point and the perforation Be of the boundary of the preceding and succeeding paper is driven at a position corresponding to the cut roll 10a. The motor M1 is stopped to stop the paper feeding operation.

Even if the drive motor M1 is stopped, the drive motor M2 is turned on to feed the preceding printing paper, so that the preceding paper is cut off from the perforations as a waste ticket receipt. At this time, the rear sheet is positioned at a predetermined position where the leading edge BCa is located on the lower peripheral surface of the cut roll 10a.

The timing "d" in FIG. 7 follows the timing "d" in FIG. The cut waste receipt is sent to the receipt discharge passage P by the discharge system by the drive motor M2 and is sent in the discharge direction. When the discharge sensor 14 detects the rear end of this receipt at the timing "e", the control device 16 to which this signal is input controls the drive motor M2 to immediately drive the reverse rotation, and the scrap ticket sent to the discharge passage P. Start returning the receipt.

When the drive motor M2 rotates in the reverse direction, the discharging belt 11 and the collecting belt 17 are driven in the reverse direction to take in the waste ticket receipt in the discharging passage P into the collecting passage Q in a switchback manner. In FIG. 7, the timing "ri" is for detecting the leading edge of a scrapped receipt, and the timing "le" is forgotten removal sensor 15
The timings when the trailing edge of the receipt comes off are shown.

The receipt of the receipt sent into the collection passage Q is detected by the collection path sensor 22 at its leading edge at timing "wo", and at the timing "wa" at the trailing edge of the collected scrapped ticket receipt. When the recovery path sensor 22 detects the trailing end of the receipt at the timing "wa", the drive motor M2 is stopped when the step b is sent, and the recovery belt 1
The feeding action of 7 is stopped, and the operation of accommodating scrapped tickets is completed. b
Receipts collected by step feed are tray 1
9 collected on. The collected receipt presence / absence sensor 20 detects the collected receipt.

Even if the trailing edge of the receipt collected by the discharge path sensor 14 is detected at the timing "nu" and the z-step is sent, if the trailing edge detection "wa" signal is not output by the collecting path sensor 22, the receipt is fed. Jam processing is executed assuming that an abnormality has occurred.

“Forgetting to collect” mode (see FIG. 8) This mode follows the printing / discharging mode (see FIG. 6) when the user forgets to take the receipt facing the receipt outlet 2. This is to be executed and is for collecting a receipt that has been forgotten.

In FIG. 8, the process up to the timing "F" is the same as the process up to the timing "F" in FIG. The discharged receipt is stopped by operating the forget-to-take sensor 15. At this time, the discharge path sensor 14 does not detect the receipt. Even when the time “t” has elapsed since the forget-to-take sensor 15 detected the receipt, the control device 16 to which the signal indicating that the forget-to-take sensor 15 has detected the receipt is input is stopped. The drive motor M2 that has been used is rotated in the reverse direction, and the receipt discharging means D and the receipt collecting means E are driven in reverse. When the discharge belt 11 reversely rotates, the receipt held by the pinch roller 13 and the discharge belt 11 is sent back toward the receipt collecting path P.

The receipt sent back is the carry-out path sensor 1.
The leading end is detected at timing "ri" at 4, and the trailing end is separated from the forgetting sensor 15 at timing "le".
The following operation is the same as the forced recovery mode shown in FIG. 7. In the forced recovery mode shown in FIG. 7, the drive motor M2 is switched from the normal rotation to the reverse rotation immediately, whereas in the forget-to-take recovery mode shown in FIG. 8, the receipt discharged to the discharge port 2 is sent back, The detection time y of the trailing edge / leading edge of the receipt by the road sensor 14 is long.

[0047]

As described above, according to the present invention, when the power is turned on and the printing apparatus starts to operate, the leading end of the printing paper pulled out from the roll paper is always positioned at a predetermined position. Therefore, the start-up of printing starts faster.
Further, since the waste ticket processing is performed so as not to perform double printing, a printed matter such as a receipt having a bad appearance is not issued.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a receipt issuing device including a printing paper positioning mechanism of the present invention.

FIG. 2 is a perspective view showing a roll sheet and a print sheet pulled out from the roll sheet.

FIG. 3A is a schematic side view showing a relative position between a print sheet positioned at a predetermined position and a positioning sensor, and FIG. 3B is a schematic side view showing a relative position between a print sheet partially printed and a positioning sensor. A side view, (c) is a schematic side view showing the print sheet once returned to the position of the positioning sensor.

FIG. 4 is a flow chart for explaining the operation of the present invention.

FIG. 5 is a time chart for explaining a paper cueing mode.

FIG. 6 is a time chart for explaining a print / discharge mode.

FIG. 7 is a time chart for explaining a forced recovery mode.

FIG. 8 is a time chart for explaining an uncollected collection mode.

FIG. 9 is an external perspective view showing an example of a receipt issuing device to which the present invention is applied.

[Explanation of symbols]

 2 ... Receipt discharge port 8 ... Positioning sensor 9 ... Printing means 10 ... Cutting means 14 ... Discharge path sensor 15 ... Forgetting sensor 16 ... Control device B ... Receipt BB ... Roll paper Bd ... Mark C ... Paper feeding means D ... Receipt discharging means F ... Paper feeding means O ... Paper feeding passage P ... Receipt discharging passage Q ... Receipt collection aisle

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[Procedure amendment]

[Submission date] January 8, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Above the printing means 9, a receipt collecting means E for collecting receipts is arranged. The receipt collecting means E has a receipt collecting passage Q branched from the discharge passage P, a collecting belt 17 abutting against the discharging belt 11, and a belt roller 17 around which the belt is wound.
a, 17b , a pinch roller 18, a tray 19 for storing collected receipts, and a collection receipt presence / absence sensor 2 for detecting whether or not there are collected receipts in the trays 2.
0, a near-full sensor 21 that detects whether or not there is room to store a receipt to be collected, and a collection path sensor 22 that is disposed in the receipt collection passage Q and that detects whether or not there is a receipt in the passage. Is becoming The recovery belt 17 is the discharge belt 11 driven by the discharge system drive motor M2.
It is driven to rotate together with.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

The positioning sensor 8 monitoring the mark Bd of the returned printing paper is "black" (the mark Bd has a hole B
f is formed, the sensor detects whether it is black or not).
The mark Bd has been returned to the sensor 8 . As shown in FIG. 3C, the control device 16 which receives the signal from the sensor 8 that has detected the “black” due to the mark and the hole has a predetermined length ((m) + (m) + (m). m + α) only,
Further reverse feed. Therefore, the printing paper BC is as shown in FIG.
As shown in, the mark Bd portion is sent back from the sensor 8 to the retracted position. The control device 16 stores the return amount of the print paper from the start of the return to the end of the return by an appropriate counting means.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Therefore, when the "positioning feed" is completed, the control device 16 obtains the difference between the return amount and the feed amount of the loaded sheet, and compares this difference with the length A for one printing line. If this difference is smaller than the length A corresponding to one line of printing in the paper feed direction, the leading edge of the printing paper before being returned should have been positioned on the cut roll 10a, or the leading edge should be positioned before this roll. Even if the roll is overrun or the roll is overrun, the amount is smaller than one line of printing. Therefore, since this printing paper has not been printed yet, the predetermined position shown in FIG. Then, the positioning operation for the sheet is completed. First, the mark Bd on the paper BC is detected by the sensor 8.
If it was stopped in front, put the sensor 8 first
The edge BCa is detected. In this case, return m + α further
Also the sensor output remains black. Therefore, the next paper feed
After the mark is detected with, the same operation as above is performed.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Claims] 1. A printing apparatus in which required items are printed by a printing unit on a printing sheet drawn from a roll sheet, and then the printing sheet is cut into a predetermined length by a cutting unit and discharged. The printing paper is formed on the printing paper pulled out from the roll paper, which is provided upstream of the printing paper feeding means provided in the paper feeding path and the paper feeding means provided so as to be able to feed the printing paper in the forward and reverse directions. Position detection sensor that detects a mark and outputs a signal for determining the position of the printing paper in the paper feed path; and a position where the positioning sensor detects at least the mark when the printing device is powered on. The paper feeding means is reversely driven so that the printing paper is fed back up to, and after the position sensor detects the mark, the paper feeding means Positioning mechanism of the printing paper, characterized by comprising a control device for controlling the paper feed means to deliver a normal rotation to the printing paper to a predetermined position.