KR0132864B1 - The printing method and apparatus - Google Patents

Abstract

Disclosed is a printing device to be suitable for printing without margins at the front or rear end of recording paper. It presses and prints the front end of recording paper by a transferring drum whose ink ribbon and recording head can be contacted to the front end of the recording paper, and feeding recording paper whose front end can contact the drum.

Description

Printing method and device

1 to 2 and 4 to 8 is an operation diagram showing the operation of the printing apparatus according to the present invention.

Figure 3 is a schematic perspective view showing the main portion of the printing apparatus according to the present invention.

9 is a schematic view showing a recording sheet printed through a printing apparatus according to the present invention.

10 is a schematic view showing a conventional printing apparatus.

* Explanation of symbols for main parts of the drawings

10: recorder cassette 11: feed cam

12: guide roller 20: drum

21,22: roller 25: motor

26: cam 30: recording head

40: ink ribbon 71, 72: recording paper sensor

80: solenoid 85: connecting member

86: moving groove 90: frame

91: guide groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus for recording an image of an original on a recording sheet, and more particularly, to a printing apparatus capable of eliminating or minimizing a margin portion where an image is not recorded at the front end or rear end of a recording sheet.

In general, a thermal transfer printer has a ribbon on a film in which ink dye is applied in a sequential order between a thermal recording head and a recording paper to be greeting, so that ink sublimated in a predetermined pattern by the thermal recording head is applied to the recording paper. It has a transfer structure to be transferred, and in particular, the color thermal transfer printer has a form in which the decomposed images of the color-decomposed yellow, magenta, and cyan are overprinted three times in order to realize full color.

8 shows a conventional portion of a thermal transfer printer. On the lower side of the platen drum 2, a recording paper cassette 6 is provided, and on the side of the platen drum 2, the recording paper 4 fed from the recording paper cassette 6 to the feed cam 8 is placed on the drum side. A plurality of guide rollers 3 in close contact with each other are provided. The drum shaft 2 'is provided with a clamp 5 for clamping the tip of the recording paper 4 to transfer the recording paper 4 around the drum 2, and on the upper part of the drum 2 a predetermined heating element. The heat recording head 1 generated by heat is provided so as to be movable.

On the other hand, an ink ribbon 7 is provided between the thermal recording head 1 and the recording paper 4 so that the ink is sublimed by heat generation and pressurization of the thermal recording head 1 so that an image is printed on the recording paper 4. It is.

However, in the printing apparatus as described above, printing is performed in a state in which the tip of the recording paper 4 is clamped with the clamp 5, so that the recording paper 4 between the clamped recording paper 4 and the initial printing position from the front end thereof is clamped. ) Has a problem that the image is not printed as much as the width (a) and the margin remains.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a printing method capable of printing without a margin at a front end or a rear end of a recording sheet and a printing apparatus suitable for implementing the printing method.

The present invention for achieving the above object is a printing method for feeding a recording sheet into a rotating drum and pressing the ink ribbon as a recording head on the recording sheet to record an image.

And a drum feeding step of feeding the recording paper such that the tip of the recording paper is in contact with the drum, and a drum feeding step of transferring the drum such that the leading end of the recording paper is in contact with the ink ribbon and the recording head. Characterized in that recording is performed.

A printing apparatus according to the present invention suitable for carrying out the printing method, presses an ink ribbon so that an image is recorded on a rotating drum, an ink ribbon, a drum and an ink ribbon, and a recording paper fed between the drum and the ink ribbon. In a printing apparatus having a recording head,

The recording head is fixed and provided with paper feeding means for feeding recording paper into the drum so as to contact the tip of the recording paper, and conveying means for transferring the drum with the tip of the recording paper to the recording head side. And printing is started in a state where it is pressed against the recording head.

Hereinafter, an embodiment of a printing method and apparatus thereof according to the present invention will be described in detail with reference to the accompanying drawings.

A drum which is first rotated, a capstan roller driven to rush the recording paper to the drum, an ink ribbon coated with ink dye in sequence, a predetermined heating element, and thermally pressurized the ink ribbon to record an image on the recording paper. In the thermal transfer printer having a recording head, a printing method according to the present invention includes a paper feeding step of feeding the recording paper by driving the capstan roller with a predetermined step so that the tip of the recording paper contacts the drum, and the recording paper in contact with the drum. And a drum transfer step of transferring the drum to the recording head side so that the tip of the drum contacts the ink ribbon and the recording head so that recording starts from the leading edge of the recording paper while the tip of the recording paper is in contact with the ink ribbon and pressed against the recording head. .

The printing method according to the present invention is different from the conventional printing method in which the leading end of the recording paper is clamped with the clamp, so that the drum is moved to the recording head side without the use of the clamp so that an image is recorded from the leading end of the recording paper so that the image is recorded in the entire recording. Allow the image to be recorded.

The printing apparatus according to the present invention suitable for carrying out such a printing method according to the present invention is as follows.

Referring to FIG. 1, the printing apparatus according to the present invention includes a paper feeding means for feeding the recording paper 50 so that the tip of the recording paper 50 is in contact with the rotating drum 20, and the tip of the recording paper 50 is in contact. The conveying means for conveying the used drum 20 to the recording head 30 side is provided.

The paper feeding means was configured as follows. A recording paper cassette 10 in which recording paper 50 is accommodated is installed under one side of the drum 20, and the recording paper 50 drawn out by the feeding cam 11 is driven by a predetermined power source to drum the recording paper 50. A capstan roller 14 for feeding the paper to the side of the drum 20 is installed, and a tip of the recording paper 50 fed to the drum 20 is detected between the drum 20 and the capstan roller 14, and the detection signal (50) is detected. ) Is configured by installing a recording sheet sensor 71 for detecting the tip of the head and transmitting the detection signal to the power source to drive the capstan roller 14 until the tip of the recording sheet 50 contacts the drum 20. .

Here, a guide roller 12 for guiding the recording paper 50 is provided between the capstan roller 14 and the recording paper cassette 10, and a discharge roller 13 for discharging the recording paper on which image recording is completed is provided. . Then, between the capstan roller 14 and the recording paper cassette 10, a sensing sensor 72 for detecting the rear end of the recording paper 50 is provided adjacent to the capstan roller 14.

On the other hand, the conveying means (see Fig. 3) is installed in contact with the cam (26) rotated by the motor 25 to the shaft (20 ') of the drum 20, the shaft in accordance with the rotation of the cam 26 20 'is interlocked so that the drum 20 is conveyed to the recording head 30 side, where the shaft 91 moves on the frame 90 on which the drum 20 is supported as the cam 26 interlocks. To form a guide groove 91 of the a-shape having a horizontal portion and a vertical portion to be formed. At this time, the shaft 20 'of the drum 20 moves along the vertical portion of the guide groove 91.

The drum 20 further includes clamping means for clamping the recording paper 50 whose tip is in contact with the drum 20. The clamping means has a roller 21 in contact with the drum 20 and is driven. Separating means for separating the roller 21 from the drum 20 was configured such that the tip of the recording paper 50 was crimped between the drum 20 and the roller 21.

The separating means couples the shaft 21 'of the roller 21 to the guide groove 91 formed in the frame 90 as shown in FIG. The solenoid 80 is coupled to the shaft 21 'of the roller 21, and the roller 21 is separated from the drum 20 according to the operation of the solenoid 80. 80 and the roller shaft 21 'are connected to each other by a connecting member 85 having a moving groove 86 in parallel with the vertical portion of the guide groove 91, and the shaft of the roller 21 in the moving groove 86. (21 ') was combined. Therefore, according to the operation of the solenoid 80, the roller 21 can be moved along the horizontal portion and the vertical portion of the guide groove 91. When the vertical portion of the guide groove 91 is moved, the roller 21 has its own weight. It is guided by the vertical portion of the moving groove 86 and the guide groove 91 of the connecting member 85 is able to move downward.

On the other hand, between the recording head 30 and the drum 20, an ink ribbon 40 coated with ink dye in surface order is wound on the supply reel 41 and the winding reel 42, and the recording paper 50 is fed. A guide member 60 for guiding the recording paper 50 is provided in the path and the discharge path, and the roller 22 for conveying the recording paper 50 is engaged by the roller 21 separated by the separating means. It is provided on one side of 20).

Effects of the printing device according to the present invention configured as described above are as follows.

First, the feeding cam 11 is driven in accordance with the feeding signal to feed the recording paper 50. At this time, the recording paper 50 is guided by the guide roller 12 and moved to the capstan roller 14 side. When the leading edge of the recording paper 50 is passed through the capstan roller 14, the detection signal drives the capstan roller 14 by a predetermined number of steps so that the leading edge of the recording paper 50 is drummed as shown in FIG. Drive until it contacts (20). At this time, the roller 21 is in contact with the drum 20 by the solenoid 80, and the tip of the recording sheet 50 is clamped between the roller 21 and the drum 20.

In this state, the motor 25 operates to drive the cam 26, and the cam 26 interlocks the shaft 20 ′ of the drum 20 so that the drum 20 is shown in FIG. 2. It raises to the recording head 30 side. When the roller 21 is in contact with the ink ribbon 40, the solenoid 80 is operated to separate the roller 21 from the drum 20 as shown in FIG. 4, and the motor 25 continues to operate to cam The drum 20 is continuously raised by driving 26 so that the tip of the recording sheet 50 is pressed against the ink ribbon 40 and the recording head 30 as shown in FIG.

Here, before the tip of the recording sheet 50 is pressed against the recording head 30, the ink ribbon 40 is wound to one side to find the selected color. In this state, a print signal is applied to the recording head 30 to print the ink ribbon 40. ) Is thermally pressurized and simultaneously the drum 20 is driven counterclockwise to record an image on the recording paper 50. At this time, the tip of the recording sheet 50 is guided by being bitten between the two rollers 21 and 22. The roller 22 is preferably driven by a predetermined driving source (not shown) to provide a transfer force to the recording paper 50 together with the capstan roller 14. As described above, the rear end of the recording paper 50 is detected by the second sensor 72 while the drum 20 is rotated counterclockwise and the recording paper 50 is moved to the left while printing is performed. When the caster roller 14 and the roller 22 are driven at a predetermined number of steps, the rear end of the recording sheet 50 is sandwiched between the drum 20 and the recording head 30 as shown in FIG. That is to say, the recording paper 50 is transported to be printed to the rear end and then stopped.

Subsequently, the motor 25 is driven to move the drum 20 downward by interlocking the cams 26 and simultaneously operate the solenoid 80 to move the roller 21 to the drum 20 as shown in FIG. Move to contact. At this time, the recording paper 50 is sandwiched between the roller 21 and the drum 20. Then, the recording paper 50 is moved to the right while rotating the drum 20, the capstan roller 14, and the roller 22 clockwise.

When the rear end of the recording sheet 50 is detected by the first sensor 71, the detection signal drives the capstan roller 14 in a predetermined step so that the front end of the recording sheet 50 reaches the initial printing position as shown in FIG. Then stop. In this state, the ink ribbon 40 is wound to find another color, and printing is performed while repeating the above operation.

Since printing is performed from the front end to the rear end of the printing method and the recording paper 50 as described above, printing can be performed on the line and the rear end of the recording paper 50 without a margin of an image.

As described above, the present invention provides an effective printing method and apparatus for obtaining a blank image at the front and rear ends of recording paper to improve the image quality.

Claims (7)

A printing method of feeding a recording paper into a rotating drum and pressing an ink ribbon as a recording head on the recording paper to record an image, the printing method comprising: a feeding step of feeding a recording paper such that the leading end of the recording paper contacts the drum; And a drum conveyance step of transporting the drum to contact the ink ribbon and the recording head, wherein the printing is performed by pressing the press from the leading end of the recording sheet. A printing apparatus having a rotating drum, an ink ribbon, and a recording head for pressurizing the ink ribbon so that an image is recorded on the recording paper fed between the drum and the ink ribbon, wherein the recording head is fixed and the recording paper is placed on the drum. And a feeding means for feeding the recording paper so that the front end is in contact, and a conveying means for transferring the drum with the tip of the recording paper to the recording head side, so that printing is started while the leading end of the recording paper is pressed against the recording head. Printing apparatus characterized by the above-mentioned. 3. The paper feeder according to claim 2, wherein the paper feeding means detects the feed roller which is driven by a predetermined power source to feed recording paper toward the drum, and the tip of the recording paper which is installed between the drum and the feed roller and feeds the detection signal to the power source. And a recording sheet sensor which transfers and drives the paper feed roller until the front end of the recording sheet contacts the drum. 3. The printing apparatus according to claim 2, wherein the conveying means is configured to contact the shaft of the drum with a cam that is rotated by a motor, so that the shaft is interlocked with the rotation of the cam so that the drum is conveyed. The printing apparatus according to any one of claims 2 to 3, wherein the drum further includes clamping means for clamping the drum to the drum. 6. The clamping means according to claim 5, wherein the clamping means comprises a roller driven in contact with the drum and a separating means for separating the roller from the drum, so that the leading end of the recording paper is clamped between the drum and the roller. Printing device. 7. The printing apparatus according to claim 6, wherein the separating means extends the solenoid on the shaft of the roller so that the roller is separated from the drum according to the operation of the solenoid.