JPS6094374A - Printer - Google Patents

Abstract

PURPOSE:To permit the operation of printing even on small-sized papers by a printer by using a system in which when the length of recording medium detected is smaller than the distance between the first and second rollers, the printing medium is moved to an insertion port by the first roller after being printed. CONSTITUTION:If the distance between the first and second rollers R1 and R2 is Da as step number of a step motor ST, the distance beteen the first roller R1 and the second sensor UPS is Dc, the distance between the roller R1 and a printing head H is Dd, and the distance between the first sensor MDS and the roller R1 is Db, when the tip of a paper is detected by the second sensor UPS, the step number Dc is written in a control circuit CNT and counted every step of feeding. When the rear end of the paper is detected by the first sensor MDS, the first roller R1 is reversely turned if the tip of the paper does not reach the second roller R2, and the paper 3 printed is discharged to front face from the insertion port.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] In the present invention, short sheets of paper such as postcards are ejected from the print slot, and long sheets such as B5 paper and roll paper are ejected from the print slot. The present invention relates to a printing device in which the paper is ejected from the ejection port opposite to the paper sheet, and the paper is ejected from the insertion port or the ejection port depending on the length of the paper.

[Prior art and problems]

Various printers are used as output devices for data processing devices. FIGS. 1 and 2 schematically show a thermal transfer printer.

1 is a power switch, 2 is a display lamp that shows the power on state, 3 is a display lamp that shows an alarm state, 4 is a display lamp that shows an online state, 5 is an online switch that switches between online and offline, and 6 is an offline state. A switch for performing a page break, 7 a switch for starting a line in an offline state, 8 a paper to be printed on, 9 an upper cover that can be opened and closed when replacing the ribbon spool, 10 a paper insertion slot, 1
1 is a paper receiver, 12 is a thermal head, 13 is an ink ribbon, 14 is a ribbon receiver on the winding side, and 15 is a ribbon receiver on the feeding side. The thermal head 12 then performs predetermined printing on the paper inserted through the paper insertion slot 10.

In such a printer, as shown in FIGS. 3(a) and 3(b), a 10th roller R1 is installed on the paper insertion side on the front side and acts as an insertion roller, and the paper ejecting roller behind it is installed. A 20th roller R2 that acts as a discharge roller is installed on the side. Then, MDS (Mt
dia Ddgct 5enJor) and above it (
UPS (Upper
5 sensor) is arranged, and the head H is located next to this UPS.

When printing, first set the paper P on the front side. At this time, the paper PA passes through the 1st sensor MDS and the 10th-
La 1. However, when the first sensor MDS detects the paper PA, the 10th sensor MDS detects the paper PA. R1, the 20th wheel R2, and the box 2 are rotated by a step motor (not shown). As a result, the paper FA passes between the 10th line R1 and R1, but when the second sensor UPS detects this, it means that the paper edge has been detected, and printing position control is performed. Then, the sheets are sequentially fed and discharged by the 20th roller R2.

After that, when the bottom edge of the paper FA passes the second sensor UPS, the paper PA is
will be ejected backwards.

By the way, this can be done if the lengths of paper P and A are the first
Only when the distance between the 0th line R1 and the 20th line R2 is longer than A, and if the length of the paper FA is smaller than A, then the distance between the 0th line R1 and the 20th line R2 is -La 2
will be left behind. For this reason, there was a problem in that it became impossible to print on short sheets of paper such as postcards and envelopes, and the range of capabilities of the printer was reduced.

[Purpose of the invention]

The purpose of the present invention is to improve the above-mentioned problems and to make it possible to feed out printed sheets of paper not only for sheets that are longer than the distance between the rollers, but also for short sheets of paper without being left behind between the rollers after printing is completed. The object of the present invention is to provide a printing device that enables printing.

[Structure of the invention]

In order to achieve this object, the printing device of the present invention includes: a printing device that prints data on a recording medium; a first roller that transports the recording medium from the recording medium insertion slot to the printing device;
a second roller for transporting the recording medium from the printing means to the discharge port; a detection means for detecting the length of the recording medium in the transport direction of the recording medium supplied to the printing means; and a first roller means for detecting the length of the recording medium in the transport direction. and a control means for transporting the recording medium to the insertion slot by the first roller means after printing data on the recording medium when the distance is smaller than the distance between the first roller means and the second roller means.

[Embodiments of the invention]

Before describing the present invention in detail based on one embodiment, an outline thereof will be explained.

In the present invention, when the length of the paper to be printed is longer than the roller interval, the printed paper is sent out from the paper insertion side to the opposite side as in the conventional method. However, if the paper length is shorter than this roller interval, the paper is controlled to be sent to the paper insertion side after printing. Therefore, when the trailing edge of the paper is detected by the MDS of the first sensor, and the leading edge of the paper has not reached the 20th-ra R2, the 10th-ra R1 is reversed and the printed paper is inserted into the paper insertion slot. It was designed to be sent out.

Before describing the present invention in detail based on embodiments, its outline will be explained based on FIGS. 4 and 5.

As shown in FIG. 5, the distance between the 10th RA R1 and the 20th RA R2 is the number of steps of the step motor ST in FIG. Let DC be the number of steps of the step motor ST, and let Dd and DC be the distance from the 10th line 1 to the print head H and the distance from the first sensor MDS to the 10th line R17, respectively. .

When the leading edge of the paper is detected by the second sensor UPS, the number of steps Dc is written in the register, and the value of DC written in the register is incremented by 1 for each step of the step motor when the paper is sucked.

When the paper is sucked and the first sensor MDS detects the end of the paper, if the leading edge of the paper does not touch the 20th rack R2, the 10th rack 1 is reversely rotated and the paper is inserted into the insertion slot. If the paper is to be ejected closer to the front, if the register value is not Dc when the first sensor MDS detects the edge of the paper, the control circuit determines that the leading edge of the paper has not reached the 20th-ra R2. The CNT reversely rotates the 10th roller R1 with the step motor 8T, and the paper on which printing has been printed by the printing mechanism P is ejected from the front insertion slot side. However, the first sensor MDS
When the paper edge is detected, if the paper is located on the 20th line 'R2', the paper is sent in the normal direction 'R2'.
The paper printed by the printing mechanism P is sent out from the rear discharge port.

The details of the configuration of an embodiment of the present invention are shown in FIG. 6, and the state transition diagram in FIG.
The description will be made based on the flowchart in the figure and with reference to other figures as necessary.

In FIG. 5, reference numeral 21 is a CPU, which is a control section that not only performs overall control of this thermal transfer precipitator, but also performs appropriate control according to the outputs of various detectors 1, and performs various calculations. 2? is a ROM that stores programs, character buttons, etc. necessary for operating the CPU'21, and this ROM22 contains a table 22.
' are provided, and the step numbers Da and Dc shown in FIG.
, Dd and the margin (number of steps) Mc, M which will be described later.
c etc. are entered. 23 is an input port into which print data and strobe signals are input; 24 is a strobe detector which detects a strobe signal when print data is sent out in an online state and outputs a detection signal to the CPU 21; When this strobe detection signal is output, it recognizes that data is set in the input port and reads this data. 25 is an output port which outputs a BUSY signal indicating that data cannot be received because it is in operation;
Select to indicate online status) (5LCT
) signal, and also lights up the display lamp 4 indicating the online status, and outputs a reset signal r that resets the strobe detection signal that was output from the strobe detector 24 when the previously received data was printed. . 26
is an input buffer, which temporarily holds input data, and is constituted by RAM. Reference numeral 27 is an output port and is a driver for the display lamp 3 that indicates an alarm state, for example, displays an alarm at the ribbon end.

28 is a register section, which is a register A to be described later.

A register B, a register S, etc. are provided. Reference numeral 29 denotes an input port which functions as an input part for various sensors in the mechanism on the printer side, including a space left edge detector 31 that detects that the thermal head is at the left edge position, and a first sensor MD8 that indicates where the paper is present. ', a paper detector 32 constituted by a second sensor UP8, etc., and output signals from a ribbon end detector 33, which detects the ribbon end state, that is, whether or not the ribbon is completely wound, are input.

Reference numeral 30 denotes an output port, and a driver 34 controls a head approach motor 38 that moves the thermal head 12 up and down so that it is positioned near the paper during printing and away from the paper when not printing. A driver 35 that controls a space motor 39 that moves the head 12 laterally, and a line feed motor 4 that feeds both sheets of paper by one line.
This output signal is used to control the driver 36 that controls the print data 0, the driver 37 that sends print data to the thermal head 12, and the like.

- Next, the operation of the present invention will be explained using the state transition diagram shown in FIG.

In the present invention, the "out of paper" state in which no paper is set in the printer is the reset, and this is the starting point.

[B] When no paper is inserted in the "out of paper" state, the first sensor MDS is in the "0" state and the printer does nothing, but when paper is inserted by the operator, the first sensor MDS is in the "0" state as shown in FIG. 1 sensor MDS outputs "1",
In register A of the register 28, the distance Dc from the 10th-ra R1 to the second sensor UP8 plus an appropriate margin Mc (Dc + Mc) (number of steps) is entered. Here, Mc is appropriately determined in consideration of slippage and the like. Since this MDS outputs "1", the state then moves to the "scheduled inhalation" state. If the paper is correctly placed on the 10th line R1, the step motor 40 (A=
D, +MC) 2nd sensor UP while advancing the step
S will output "1".

[Explanation] In the "inhalation schedule" state, the data in register A is decremented by 1 each time the step motor ST forming the line feed motor 40 operates one step. In the state transition diagram of FIG. 7, rsFJ indicates that the step motor is operated one step, and A:=A-1 indicates that the data written in register A is incremented by -1.

Therefore, as shown in FIG. 9, the paper is sucked in by the operation of the step motor. At this time, as shown in Figure 8,
At first, r Dc, + McJ is written in register A, and register A is not zero, and the paper is written in the second sensor U.
The second sensor UPS is “1” because the inhalation has not reached PS.
Therefore, the step motor advances by one step, and the data in register A is decremented by 1 each time.

(1) In this way, if the data in register A becomes zero before the second sensor UPS outputs "1", CP
U21 judges that the paper suction has failed, reads it from the table 22' in register B of the register section 28, writes the number of suction steps Dc + Mc, that is, the number of suction steps until register A becomes zero, and writes the number of suction steps until register A becomes zero. - Rotate the roller R1 in the opposite direction to eject the paper from the front.

At this time, the step motor is rotated step back and 1
Each time you step back, the data in register B is decremented by 1. Then, it steps back until this register B becomes zero, and when it becomes zero, it stops and enters the roller-out state. This paper may still be attached to the first sensor MDS, and nothing will be done until the paper is removed by the operator and the MDS outputs zero, and once it outputs zero, it will move to the first "no paper" state. It turns out. In FIG. 7, "SB" for the front discharge idle operation indicates a process in which the step motor is moved back by one step.

(2) In the normal case, the paper is sucked in and the second sensor UPS outputs "1". As a result, the CPU 21 writes the distance DC from the 10th-ra R1 to the second sensor UPS in the register B of the register section 28, and also writes 0 in the register S. to move to.

[C] The "in suction" state is a state in which the paper is placed only on the 10th roller R1, and the step motor ST advances one step (SF) L, and each time the step number in the register B is increased by 1. Control of the "inhaling" state is performed as shown in the M2O diagram.

(1) In the "inhaling state", if the paper no longer exists on the first sensor MDS, the first sensor MDS will output zero, but at this point the top of the paper has not yet reached the 20th level 2 Therefore, this paper must be ejected from the front. At this time, the amount of paper backing is recorded in register B as the number of steps obtained by adding an appropriate margin Mc to the absorption amount up to that point (written in register B).

Then, the state shifts to the front ejecting state.

(2) If the value of register B becomes the distance Dα between the 10th line 1 and the 20th line R2 with the first sensor MDS outputting "1", then the top edge of the paper will be at the 20th line. -Since it has reached 2, move to the "Continuing paper" state, which will be described later.

(3) If the first sensor MDS does not output zero and the value of register B is also Dc, then h(:> is the distance between If the value is greater than Dd, it indicates that the paper has reached the position of the print head H. At this time, if the data in the register S is zero, printing is possible, so the drive of the 10th-ra R1 is stopped and if a predetermined print item is found. This is printed.Then, the printing interval distance (number of steps), for example 5=So, is written in the register S.

(4) In other cases, move the step motor forward by one step and add 1 to register B.

(5) If B > Dd, subtract 1 from the number written in register S. When B≦Dd, there is no paper at the position of the print head H, so the feed amount of the register S is not changed. .

[2] In the "Paper continuous" state, the paper is the first sensor MDS.

This is the case where the register S exists in the 10th line R1 and the 20th line R2, and the value in the register S is decremented by 1 each time the step motor is advanced by one step. Printing is performed when the value in this register S becomes zero, and control as shown in FIG. 11 is performed.

(1) If the second sensor UPS is not zero, the paper is being printed continuously and printing is performed as shown in (2) below. However, if the second sensor UPS is zero, it means that the bottom edge of the paper has been detected, and the CPU 21 determines the remaining number of printable steps Dd, -
Set Dc in register A and set the number of steps (D) until the paper is completely ejected.

-Dc-1-M[alpha]) is set in register B, and the state moves to the "discharging" state, which will be described later. Note that here Mα is the 10th-
This is an appropriate margin for the distance between R1 and 20th R2.

(2) When the second sensor UPS is outputting "1", if the register S becomes zero, it indicates that the paper has advanced by the specified line feed amount, so if there is a print item, the paper progresses. is immediately stopped and printing is performed, and the line feed distance step number S, which is the printing interval, is again stored in the register S. is entered by the CPU 21.

(3) If the register S is not zero, this corresponds to the other cases in Fig. 7, and the step motor is advanced by one step.
Decrement the data in register S by 1.

[E] The "discharging" state is a state in which the paper runs out from the 10th line R1 and is being moved by the 20th line R2, and the control shown in FIG. 12 is performed.

(1) If the data entered in register B in (1) of [2] above becomes zero, it is determined that the paper has moved away from the 20th rack 2, and the above-mentioned "no paper" state occurs.

(2) If register B is not zero and register S is not zero, it indicates that the paper is still below the print head and has advanced by the specified line feed amount. Therefore, the advance of the paper is immediately stopped, and if there are any items to be printed, they are printed, and S is placed in the register S. Set.

(3) If register S is not zero and register A is not zero, the paper has not progressed to the printing position, so the step motor is advanced by one step, and the number of steps remaining until the paper is ejected is written in 6A. Decrement register B by 1.

(4) If register A is not zero and is in a printable state, register S is decremented by 1, and the value in register A indicating the number of remaining printable steps is also decremented by 1.

[F] The "front side ejecting" state is when the paper is ejected from the front insertion slot in the opposite direction, and is (1) of the above-mentioned 0 slot.

This corresponds to cases such as (1) in [c], and the control shown in FIG. 13 is used.

(1) At this time, since the margin amount of tens of steps when the paper is sucked is initially written in register B, the step motor is reversed by this number of steps, and register B is decremented by 1 every time the step motor is reversed by one step.

When the register B becomes zero, the sheet has been backed up by the suction amount + the margin, and the paper should have moved away from the 10th line R1, resulting in a "roller out" state, which will be described later.

(2) In other cases, since register B is not zero, the step motor is caused to step back by one step, and the value in register B is decremented by one.

[G] The "roller out" state is when the paper is completely separated from the 10th roller box 1. However, the first sensor MD
The position of S is on the front side of the 10th-ra R1, that is, on the outside, and the position of MD indicates that the paper is detected by the first sensor MDS.
Since there is a case where S=rlJ, the operation shown in FIG. 14 is performed.

(1) First sensor MDS=r1. ．． 1, if the paper is near the drain 1 sensor MDS, the 10th-ra R1
Since it is out of the way, it does nothing until the paper is removed by the operator.

(2) If the first sensor Ml)S becomes zero output, the paper is outside the first sensor MDS, or the paper has been taken out by the operator, and the above-mentioned "no paper" is detected. Move to state.

Note that this printer prints as described in [c] above.

“Stop 1” and “Stop 2” in [2] and [E]
” and “Stop 3” state.

In these cases, Fig. 15 (α), (A),
Control as shown in CC) will be performed. Since the control in this case is the same except for the state where the value of the register S is not zero, the "stop 1" state in FIG. 15 (α) will be explained as a representative example.

(1) When the paper is stopped, the paper is present at the printing position, so it is ready for printing, and if there is something to be printed, it will be printed.

(2) Input in register S the number of steps to be sent next. The input to this register S is determined by a line feed command or the like, but for example, the number of line feed steps, 80, may be written in advance in the table 22' and then read out.

(3) If the value set in this register S does not become zero, the state returns to the "inhaling" state.

In addition, in the above "Stop 2" and "Stop 3", if the value set in this register S is not zero, "Stop 2" and "Stop 3" are respectively "
The state will return to "Continuing paper" or "Discharging".

In this way, the printer can perform printing as appropriate depending on the state of the paper, eject printed paper from the rear ejection port, eject it from the front paper insertion port, and perform the optimal operation according to the paper. It can be performed.

Next, the output port 30 and driver 35 that control the space motor 39 will be described in detail.

FIG. 16 shows a specific circuit diagram of the output port 3 and driver 35 when a four-phase step motor is used as the space motor. 90 is a rotor, and 91 to 94 are stator coils. Current is passed through the stator coils 91 to 94 in order (
(excitation), the rotor 90 rotates. still,
A-D indicates the phases of the motor.

In Fig. 17, each stator coil 9 of the above step motor is shown.
1 to 94, that is, the excitation signal patterns given to phases A, B, C, and D, and the rotation direction of the rotor 90 are shown. 17th
In the figure, assuming that the current position is the 0th stelaph, the excitation signal patterns of the A-D phase coils 91 to 94 are (1, 0, 0, 0) in order from the human phase. However, "1" indicates that it is excited. Now, in order to rotate one step in the positive direction from the current position, change the excitation pattern to (1°0
．． 0.0) to (1, 1, 0, 0). Similarly, to rotate one step in the opposite direction, the excitation pattern may be changed from (1, 0, 0, 0) to (1, 0; O,, 1).

According to Fig. 17, there are 8 combinations of excitation patterns.
There are only types. This is shown in a table as shown in FIG. 18, and the excitation pattern ROM1'03 shown in FIG.
The excitation pattern shown in the figure is stored. That is, to rotate the step motor in the forward direction, excitation pattern ROM1
Set the address of 03 to 0, 1 . ..., 7,0. 1 of...
All you have to do is read it with @ and use the output to excite each coil of the motor.

On the contrary, 0.7, 6. ..., 0,7. If they are read out in this order, they will rotate in the opposite direction.

In FIG. 16, reference numeral 100 is an excitation pattern generating section, which provides an excitation pattern to the step motor drive section 104 in response to a one-step forward rotation and reverse rotation instruction sent from the CPU 21 shown in FIG. .

101 is an internal output port. When data for forward rotation and reverse rotation is received from the CPU, the output port 101 outputs a count up pulse P to the up/down counter 102.
, and a countdown pulse P.

The up/down counter 102 has a binary 3-bit output of 0.
Outputs 1 to O2, which is the excitation no f turn ROM103.
address signal input terminal A. ~A.

is input to. The count up input terminals C, U, P/ of the up/down counter 102 are connected to the output port 101.
The count up pulse output terminal Pl is connected to the input terminal C.
D0WN is a count up pulse output terminal P.

are connected to each other, and when a no-phrase response is input to the terminal CUP', the output of the up/down counter 102 is 0°~
The value indicated by 02 increases by +1, and when this pulse is input to the terminal CD0WN'1, the output of the up/down counter 102 becomes 0.
The numerical value indicated by °~02 is decreased by 1. up/down counter 1
02 output 0°~0. is 3 bits, so it can be expressed as a decimal value from 0 to 7, but if a pulse is input to terminal CUP when the output is 7 (i.e. "111"), the output returns to 0 (i.e. "000") and the output becomes When a pulse is input to terminal CD0WN at Q (-000°), the output becomes 7 (ie, "111-").

Address input terminals A0 to A of excitation pattern 0M103
, have 3 bits, and output terminals QA-QD have 4 bits.

The output pattern for each address θ~7 (000~111) is as shown in Figure 18 for each output terminal QA-Q.
Output to D. The output signal pattern of the output terminals QA to QD indicates the excitation pattern of each phase A to D of the step motor, and is input to the step motor drive section 104.

The step motor drive section 104 receives the excitation pattern from the excitation pattern generation section 100 and causes current to flow through each stator coil 91 to 94 of the step motor. R1-R4 are base current limiting resistors, T.

~T is a stator coil driving transistor, 几.

~R, is a current limiting resistor, D, -D is a diode, D
, is a Zener diode to absorb the energy stored in the stator coil. Since the method of driving the four coils is the same, only the case of driving the stator coil 91 will be described. Excitation pattern ROM
When the stored value of i03 is "0", voltage O (V) is output to output terminal QA. For this reason, the transistor T,
No base current flows through. Therefore, this transistor T is in an off state (collector current does not flow),
No current flows through stator coil 91. (Not excited) Next, the stored value of the excitation pattern ROM'103 is "1"
In the case of , a voltage of 5 [V] is output from the output terminal QA,
A resistor R is connected to the transistor T.

A base current flows through it. At this time, there is resistance.

The value of is when the transistor T is completely turned on (saturated state)
and transistor 1
It is set in such a way that it will not break. Therefore, the transistor T is turned on, and a current flows through the fixed coil 91 along the path: 'Power supply +12V - Coil 91 - Resistor R2 - Transistor T, → Ground GNIII>.
It means that it is excited.

Next, the voltage at the output terminal QA of the excitation pattern ROM 103 becomes 0 [V] again, and the transistor T is turned off. At this time, the energy stored in the stator coil 91 becomes a current and flows through the loop of coil 91 - resistor, - diode D1 - diode D, - coil 91, and the energy is transferred through the resistor and Zener diode D. The energy that is consumed and stored in the stator coil 91 is released and is no longer excited. The above is the stator coil 92
The same applies to 94.

In such a circuit, in order to rotate the step motor one step in the forward direction, the CPU sends data to the output port 101 to output a pulse to the count-up pulse output terminal PI. Then, the pulse is input to the count-up input terminal cup of the up-down counter 102, and the current output value of the counter 102 is incremented by one. Outputs from output terminals 0° to 01 are input to addresses A0 to A2 of excitation pattern 0M103, and excitation pattern ROM1
From 03, an excitation signal pattern for rotating the step motor in the forward direction by one step from the current position is outputted from terminals QA-QD. As a result, each of the stator coils 91 to 94 of the step motor is energized to rotate in the forward direction by one step.

Similarly, in order to reversely rotate the step motor by one step, the CPU sends data to the output capacitor 101 to output a pulse from the countdown pulse output terminal P2. Then, it is input to the countdown input y#11 child CD0WN of the up/down counter 102, and the current output of the counter 102 is decreased by 1. Then, the output terminals 00-0. is the address terminal A of the excitation pattern ROM 103.

The signal pattern that should be input to A is output.

As a result, the excitation pattern 0M102 outputs an excitation signal pattern to the terminals QA-QD that rotates the step motor in the opposite direction by one step from the current position. This causes each stator coil of the step motor to rotate in the opposite direction by one step.

In order to continuously rotate the step motor step by step, the CPU may send data from the count-up pulse terminal P1 or the count-down pulse terminal P to output each pulse one time. If the time interval between the beat pulses is made too short, the step motor will not be able to follow the time interval, so the CPU must manage the time interval so that it does not become too short.

Incidentally, in reality, the excitation signal pattern generated by the excitation pattern generation section 100 is generated by the up/down counter 10.
CP without using 2 or excitation pattern ROM103.
In this case, the excitation pattern generator 100 is connected to the output port (see number 30 in FIG. 6).
) can be replaced. In this case, the CPU directly calculates and outputs the excitation pattern.

The following margins [Effects of the Invention] According to the present invention, if the paper inserted into the printer is short, it can be printed and then ejected from the front paper insertion slot, so even small paper can be printed with the printer. It can be performed. Of course, long sheets can be ejected from the rear ejection port as usual.

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams of a thermal transfer printer, Figure 3 is a schematic diagram of its paper feeding mechanism, Figures 4 and 5 are schematic explanatory diagrams of the present invention, and Figure 6 is an embodiment of the present invention. The example configuration diagrams and FIGS. 7 to 18 are detailed explanatory diagrams of the present invention. In the figure, 1 is a power switch, 2 is a display lamp that shows the power-on state, 3 is a display lamp that shows an alarm state, 4 is a display lamp that shows an online state, 5 is an online switch, 6 is a switch for changing pages, 7 is a switch to perform line feed in offline state, 8 is paper, 9 is upper cover, 10 is
is a paper insertion slot, 11 is a paper tray, 12 is a thermal head, 13 is an ink ribbon, 14.15 is a ribbon tray, 21
22 is a ROM, 23 is an input port, 24 is a strobe detector, 25 is an output port, 26 is an input buffer, 27 is an output port, 28 is a register section, 29 is an input port, 30 is an output port 1-, 31 is a space left edge detector, 32 is a paper detector, 33 is a ribbon end detector, 34~
37 is a driver, 38 is a head approach motor,
39 is a space motor, and 40 is a line feed motor. Patent Applicant Fujitsu Limited Patent Attorney Akira Sakae Yamatani Figure 6 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 17 Figure 18

Claims (1)

[Claims] Printing means for printing data on a recording medium, a first roller for transporting the recording medium from the recording medium insertion port to the printing means, and a first roller for transporting the recording medium from the printing means to the ejection port. a second roller, a detection means for detecting the length of the recording medium in the transport direction to be supplied to the printing means, and when the detected length is smaller than the distance between the first roller means and the second roller means; , a control means for transporting the recording medium to an insertion slot by a first roller means after printing data on the recording medium.