JP2007223269A - Printer - Google Patents

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JP2007223269A
JP2007223269A JP2006049817A JP2006049817A JP2007223269A JP 2007223269 A JP2007223269 A JP 2007223269A JP 2006049817 A JP2006049817 A JP 2006049817A JP 2006049817 A JP2006049817 A JP 2006049817A JP 2007223269 A JP2007223269 A JP 2007223269A
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Japan
Prior art keywords
recording paper
guide
ink ribbon
thermal head
printing
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JP2006049817A
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Japanese (ja)
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JP4637035B2 (en
Inventor
Takahiro Okuie
Toshihiro Oyoshi
利洋 大▲吉▼
孝博 奥家
Original Assignee
Sanyo Electric Co Ltd
三洋電機株式会社
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Application filed by Sanyo Electric Co Ltd, 三洋電機株式会社 filed Critical Sanyo Electric Co Ltd
Priority to JP2006049817A priority Critical patent/JP4637035B2/en
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Abstract

An object of the present invention is to prevent occurrence of white spots when printing on recording paper using an ink ribbon.
A printing apparatus includes a thermal head 5 that transfers ink on an ink ribbon 62 onto a recording sheet 40 in the apparatus main body 3 and a recording head that is positioned upstream of the ink ribbon 62 relative to the thermal head 5. A guide member 2 is provided that guides traveling by pressing the paper 40 and the ink ribbon 62. In the guide material 2, at least one side portion in the width direction substantially orthogonal to the traveling direction of the recording paper 40 protrudes toward the traveling side of the recording paper 40 from the central portion.
[Selection] Figure 4

Description

  The present invention relates to a printing apparatus that prints images and characters on recording paper using an ink ribbon.

FIG. 7 is a front view showing an outline of a conventional printing apparatus (see Patent Document 1). After the recording paper (40) is wound around the platen roller (4) by a desired angle, the recording paper (40) is sandwiched between the pinch roller (45) and the capstan (46) and fed from the left side to the right side in FIG. The ink ribbon (62) in which yellow, magenta, and cyan inks are separately applied in the transport direction is guided by the sheet-like guide material (2) and wound from the supply roller (61) to the take-up roller (64). Taken and run from left to right. A thermal head (5) is provided above the ink ribbon (62) so as to be movable up and down.
FIG. 8 is an enlarged view of the vicinity of the thermal head (5). During printing, the thermal head (5) is pressed against the platen roller (4) through the ink ribbon (62) and the recording paper (40). The thermal head (5) is energized and heated, and the ink applied to the ink ribbon (62) is transferred onto the conveyed recording paper (40) by this heat. The ink ribbon (62) is conveyed in a tensioned state, and the running disorder is prevented by the guide material (2). In the following description, the direction in which the recording paper (40) is conveyed is the front, and the reverse direction is the rear.

JP-A-8-99421

In order to stabilize the running of the ink ribbon (62), it is advantageous to increase the rigidity by increasing the thickness of the guide member (2) and to press the recording paper (40) and the ink ribbon (62). However, if the rigidity of the guide material (2) is increased and the recording paper (40) is pressed down too much, the following problems occur.
FIG. 9 is a view immediately after the trailing edge of the recording paper (40) passes through the guide material (2). When the recording paper (40) is released from the pressing of the guide material (2), the recording paper (40) jumps suddenly due to warping, that is, elasticity, and pushes up the thermal head (5). For this reason, the image being printed is not transferred well, and a so-called white spot phenomenon occurs. If the distance between the rear end of the recording paper (40) and the location where the thermal head (5) contacts the recording paper (40) is L, as shown in FIG. A white line portion where no image is printed is generated on the inner side by the distance L.
In the applicant's experiment, there was no problem when the thickness of the guide material (2) was 0.1 mm, but when the thickness was 0.3 mm, the rigidity increased and white spots occurred.
An object of the present invention is to prevent occurrence of white spots when printing on recording paper using an ink ribbon.

In the apparatus main body (3), a thermal head (5) for transferring the ink on the ink ribbon (62) to the recording paper (40), and located upstream of the thermal head (5) of the ink ribbon (62). Then, a guide material (2) for guiding the running by pressing the recording paper (40) and the ink ribbon (62) is provided,
In the guide material (2), at least one side portion in the width direction substantially orthogonal to the traveling direction of the recording paper (40) protrudes toward the traveling side of the recording paper (40) from the central portion.

  When the recording paper (40) further advances from the state in which the rear end portion of the recording paper (40) is pressed by the guide material (2), first, the central portion of the guide material (2) in the width direction is the recording paper ( 40) Leave. At this time, the recording paper (40) is still pressed by one side of the guide material (2). As the recording paper (40) advances, the recording paper (40) gradually moves away from the guide material (2), and finally one side portion of the guide material (2) is detached from the recording paper (40). Thus, since the recording paper (40) is gradually separated from the guide member (2) and released, the recording paper (40) does not jump suddenly with elasticity. Therefore, since the thermal head (5) does not move away from the recording paper (40), it is possible to prevent white spots while maintaining the rigidity of the guide material (2).

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of the printing apparatus. This is different from the conventional example shown in FIG. 7, in which the recording paper (40) is wound around the entire platen roller (4) for printing, and the pinch roller (45) is not provided. Further, yellow, magenta, and cyan inks are separately applied along the transport direction on the ink ribbon (62), and the ink ribbon (62) is stretched in the ink cartridge (6). The ink ribbon (62) is sent out from the supply roller (61) in the ink cartridge (6) and taken up by the take-up roller (64).
A through hole (30) into which the ink cartridge (6) is inserted is opened in the side plate (31) of the apparatus main body (3), and a platen roller (4) and recording paper (recording paper (4) are disposed below the through hole (30). A paper feed tray (8) for storing 40) is provided. In the apparatus main body (3), a take-up reel stand (7) for rotating the take-up roller (64) is provided.
In the apparatus main body (3), a support plate (51) including a thermal head (5) is swingably provided above the through hole (30). As is well known, the thermal head (5) heats the ink ribbon (62) in the ink cartridge (6), sublimates the ink, and prints an image on the recording paper (40).

  FIG. 2 is a front view of FIG. 1 and shows an outline of the entire configuration. The recording paper (40) in the paper feed tray (8) is taken out one by one by the pickup roller (80), and the recording paper (40) is wound around the platen roller (4). The platen roller (4) is rotated, the ink ribbon (62) is conveyed by the take-up roller (64) while being heated by the thermal head (5), and yellow, magenta, and cyan image information is sequentially recorded on the recording paper ( 40) to print. When printing is completed, the paper is discharged from a discharge portion (39) formed at the upper end of the apparatus main body (3).

FIG. 3 is an enlarged front view of the vicinity of the thermal head (5). The support plate (51) swings about the pivot (52), and a guide member (2) for guiding the running of the ink ribbon (62) is provided on the bottom surface of the support plate (51). The guide material (2) is formed from a sheet of PET material in view of electrostatic countermeasures, and presses the recording paper (40).
FIG. 4 is a plan view of the guide member (2) of FIG. The guide material (2) has both sides (20) and (21) in the width direction (direction B in FIG. 4) substantially orthogonal to the running direction of the recording paper (40), ie, the front side of the central portion (22), that is, the recording paper. Projecting to the running side of (40). In other words, the guide member (2) holds the end of the recording paper (40) in the width direction to the end. As a result, the guide material (2) not only guides the running of the ink ribbon (62) but also functions as follows.

  When the recording paper (40) further advances from the state in which the rear end portion of the recording paper (40) is pressed by the guide material (2), first, the central portion (22) of the guide material (2) is moved to the recording paper ( 40) Leave. At this time, the recording paper (40) is still pressed by both side portions (20) and (21) of the guide material (2). As the recording paper (40) moves forward, the recording paper (40) gradually moves away from the guide material (2), and finally both sides (20) and (21) of the guide material (2) are detached from the recording paper (40). . Thus, since the recording paper (40) is gradually separated from the guide member (2) and released, the recording paper (40) does not jump suddenly with elasticity. Therefore, since the thermal head (5) does not move away from the recording paper (40), it is possible to prevent white spots while maintaining the rigidity of the guide material (2).

FIG. 5 is a plan view showing another guide member (2). As described above, the take-up roller (64) is rotated by the take-up reel stand (7), and the take-up reel stand (7) is provided on one side of the recording paper (40) in the width direction. The front end of the guide material (2) is inclined obliquely with respect to the front and rear, and one side (20) of the recording paper (40) close to the take-up reel base (7) is less than the central portion (22). 40) It protrudes to the traveling side. In FIG. 5, the right side of the guide member (2) as viewed from the front is located on the front side of the central portion (22) and the left side (21).
In the printing device manufactured by the applicant, when viewed from the front of FIG. 5, the running of the take-up reel base (7) side of the ink ribbon (62) is unstable, and the ink ribbon (62) is guided by the guide material (2). The take-up reel base (7) side is pressed to the end. Even with the shape of the guide material (2), the rear end of the recording paper (40) is gradually detached from the guide material (2), so that the recording paper (40) does not jump up suddenly with elasticity. Therefore, the occurrence of white spots can be prevented while maintaining the rigidity of the guide material (2).
In the applicant's experiment, the occurrence of white spots could be effectively prevented by the guide material (2) shown in FIG.

  In FIG. 5, the right side of the guide material (2) as viewed from the front protrudes in the running direction of the recording paper (40), but this is only in accordance with the running characteristics of the ink ribbon of the printing apparatus. As shown in FIG. 6, the left side (21) of the guide member (2) when viewed from the front may protrude in the running direction of the recording paper (40). In other words, the guide member (2) may hold down one end of the recording paper (40) to the end.

  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

It is a perspective view of a printing apparatus. It is a front view of FIG. 1, and shows the outline of the whole structure. It is the front view which expanded the vicinity of the thermal head. It is the top view which looked at the guide material of FIG. 3 from the arrow A direction. It is a top view which shows another guide material. It is a top view which shows another guide material. It is a front view which shows the outline of the conventional printing apparatus. It is an enlarged view of the thermal head vicinity. It is an enlarged view of the thermal head vicinity. It is a top view which shows generation | occurrence | production of a white spot location.

Explanation of symbols

(2) Guide material
(3) Device body
(4) Platen roller
(5) Thermal head
(40) Recording paper
(62) Ink ribbon

Claims (3)

  1. A thermal head for transferring the ink on the ink ribbon to the recording paper in the main body of the apparatus, and a guide material for guiding the running by pressing the recording paper and the ink ribbon located upstream of the thermal head from the thermal head. Provided,
    The printing apparatus is characterized in that the guide material has at least one side portion in the width direction substantially orthogonal to the traveling direction of the recording paper protruding from the central portion to the traveling side of the recording paper.
  2. 2. The printing apparatus according to claim 1, wherein the guide member is positioned on the recording paper traveling side with respect to the width direction of the recording paper with respect to the central portion.
  3. A reel base for winding the ink ribbon is provided in the main body of the apparatus. The reel base is provided on one side of the recording paper in the width direction, and the guide material is located on the central side of the recording paper near the reel base. The printing apparatus according to claim 1, wherein the printing apparatus protrudes further toward the recording paper travel side.
JP2006049817A 2006-02-27 2006-02-27 Printing device Expired - Fee Related JP4637035B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006049817A JP4637035B2 (en) 2006-02-27 2006-02-27 Printing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006049817A JP4637035B2 (en) 2006-02-27 2006-02-27 Printing device

Publications (2)

Publication Number Publication Date
JP2007223269A true JP2007223269A (en) 2007-09-06
JP4637035B2 JP4637035B2 (en) 2011-02-23

Family

ID=38545507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006049817A Expired - Fee Related JP4637035B2 (en) 2006-02-27 2006-02-27 Printing device

Country Status (1)

Country Link
JP (1) JP4637035B2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62187059A (en) * 1986-02-13 1987-08-15 Seiko Epson Corp Thermal transfer printer
JPH01110175A (en) * 1987-10-24 1989-04-26 Nec Home Electron Ltd Recorder
JPH0899421A (en) * 1994-09-30 1996-04-16 Matsushita Electric Ind Co Ltd Heat transfer recording device
JPH09234919A (en) * 1996-02-28 1997-09-09 Toshiba Ave Corp Recording sheet guide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62187059A (en) * 1986-02-13 1987-08-15 Seiko Epson Corp Thermal transfer printer
JPH01110175A (en) * 1987-10-24 1989-04-26 Nec Home Electron Ltd Recorder
JPH0899421A (en) * 1994-09-30 1996-04-16 Matsushita Electric Ind Co Ltd Heat transfer recording device
JPH09234919A (en) * 1996-02-28 1997-09-09 Toshiba Ave Corp Recording sheet guide

Also Published As

Publication number Publication date
JP4637035B2 (en) 2011-02-23

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