JP3659535B2 - Head position adjustment device for thermal printer - Google Patents

Head position adjustment device for thermal printer Download PDF

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Publication number
JP3659535B2
JP3659535B2 JP26675196A JP26675196A JP3659535B2 JP 3659535 B2 JP3659535 B2 JP 3659535B2 JP 26675196 A JP26675196 A JP 26675196A JP 26675196 A JP26675196 A JP 26675196A JP 3659535 B2 JP3659535 B2 JP 3659535B2
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JP
Japan
Prior art keywords
platen
resistor
head
swinging
platen roller
Prior art date
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Expired - Lifetime
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JP26675196A
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Japanese (ja)
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JPH1086421A (en
Inventor
克実 斉藤
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Sato Corp
Sato Holdings Corp
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Sato Corp
Sato Holdings Corp
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Priority to JP26675196A priority Critical patent/JP3659535B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、特にサーマルヘッドを用いたサーマルプリンタにおけるヘッド位置調整装置に関するものである。
【0002】
【従来の技術】
従来、この種のサーマルプリンタとしては、プラテンローラ(以下、単にプラテンと称す)とこのプラテンに所定圧で押圧されたサーマルヘッドの間を各種印字媒体を通過させることにより、被印字媒体に価格等の商品情報をバーコードで印字するものが知られている。
【0003】
しかしながら、かかるサーマルプリンタで異なった種類の被印字媒体、例えばラベルとタグとを印字した場合、両被印字媒体における厚み、硬度、材質等が相違するため、サーマルヘッドとプラテンとの間で各被印字媒体に対応した最適な印字状態を得ることができなかった。
【0004】
即ち、プラテンが静止している状態では、サーマルヘッドの抵抗体にはプラテンを押圧する力が加わるだけであるが、プラテンが回転するとサーマルヘッドの抵抗体にはプラテンの回転方向に沿う力が加わり、この力が印字圧の良否に影響を与えるものと推察される。この場合、プラテンはサーマルヘッドの押圧力により付勢されて弾性変形するが、プラテンとサーマルヘッドの間に介在する被印字媒体がタグであると、タグは比較的硬度が大であるためプラテンの弾性変形量は少なく、逆に被印字媒体がラベルであると、ラベルは比較的硬度が小であるため、プラテンの弾性変形量が大きくなる。
【0005】
この弾性変形量の相違のため、タグとラベルとでは、サーマルヘッドの抵抗体に加わるプラテンの回転方向の力、即ち、印字圧が異なり、この結果タグとラベルとでは印字品質に良否が生じていた。
【0006】
上記不具合を解決するために、出願人は特開平4−357066号にて、サーマルヘッドの抵抗体の位置をプラテンの回転軸の回転方向前方側又は後方側に移動させることにより各種被印字媒体に高品質の印字を行い得る提案を行った。
【0007】
【発明が解決しようとする課題】
本発明は前記提案の改良発明であって、被印字媒体の厚みや硬度に合わせてサーマルヘッドの抵抗体の位置を、プラテンの回転軸の回転方向の前方側または後方側へ容易に移動でき、しかも、抵抗体の移動位置が確認できるサーマルプリンタにおけるヘッド位置調整装置を提供することを課題とする。
【0008】
【課題を解決するための手段】
本発明は、上記課題に注目されてなされたものであって、サーマルヘッドの抵抗体がプラテンローラの回転軸の回転方向の前方側または後方側に接触するようサーマルヘッドの位置を可変して設定するサーマルプリンタにおけるヘッド位置調整装置において、プラテンローラの方向に揺動可能に一端部が支持され、他端部に移動量を示す指示部を側面に有する揺動手段と、この揺動手段に連動してサーマルヘッドの抵抗体とプラテンローラとの接触位置を前記抵抗体がプラテンローラに接触したまま前記指示部の移動量に合わせて変える結合手段と、から成る。
【0009】
【発明の実施の形態】
本発明の実施の形態によるサーマルプリンタにおけるヘッド位置調整装置を図1ないし図4に基づき説明する。
【0010】
ヘッド位置調整装置1は、主に、支持機枠2、支軸4、揺動手段としての揺動部材6、結合手段としてのヘッド支持部材8から構成される。
【0011】
支持機枠2は、プラテンローラ10(以下、単にプラテンと称す)の方向(矢示X方向)、より具体的にはフレーム12と略平行する方向に固設されている。この支持機枠2には、目盛り部14、移動確認用の開孔部16、後述する係止ネジ21用の開孔部17及びヘッド支持部材8用の開孔部18が設けてある。
【0012】
目盛り部14、開孔部16、17は、支軸4を支点とした円弧状を呈しており、開孔部16の円弧の辺に沿って目盛り部14が形成されている。
【0013】
なお、支持機枠2に対向するフレーム12にも、ヘッド支持部材8用の開孔部19が設けてある。
【0014】
支軸4は、前記支持機枠2とフレーム12との間に、前記プラテン10と略平行になるよう架設されている。
【0015】
揺動手段としての揺動部材6は、一端部が前記支軸4に軸支されて揺動するように前記支持機枠2とフレーム12との間に設けられ、支軸4を支点とて、前記支持機枠2と略平行して揺動するようになっている。
【0016】
また、揺動部材6の他端部は、先細形状の指示部20となっており、揺動部材6が支軸4を支点として揺動すると、その移動位置が前記支持機枠2の移動確認用の開孔部16を透して確認できるようになっている。
【0017】
更に、目盛り部14が開孔部16の円弧の辺に沿って形成されているので、揺動部材が揺動した際の移動量は、指示部20が指し示す目盛り部14の目盛りによって確認できるようになっている。
【0018】
また、21は係止ネジであり、この係止ネジ21は、前記支持機枠2の開孔部17を挿通して揺動部材6に螺合しており、締め付けると係止ネジ21と揺動部材6との間で支持機枠2を挟持し、揺動部材6をそれ以上揺動しないように固定し、係止ネジ21を弛め手で動かすと、揺動部材6を一緒に揺動ようになっている。
【0019】
結合部材としてのヘッド支持部材8には、抵抗体22を備えるサーマルヘッド24が、抵抗体22を対向するプラテン10に接触する状態で先端部に取り付けられ、一方、後端部にはアングル部材26を介して係合部材30が幅方向(矢示Y)の左右両側端部に設けられている。
【0020】
この係合部材30は、一方が前記揺動部材6を挿通して支持機枠2の開孔部18に挿通され、また、他方は、フレーム12の開孔部19に各々挿通され、前記揺動部材6の揺動に連動して動くようになっている。
【0021】
また、Oはプラテン10の図示しない回転軸の回転中心を示す。
【0022】
次に、作用を説明する。
【0023】
係止ネジ21を弛め、この係止ネジ21を持って図1に示すように、プラテン10から遠ざかる右方向(矢示R方向)に動かすと、揺動手段としての揺動部材6は支軸4を支点として右方向(矢示R方向)に揺動する。
【0024】
揺動部材6が揺動すると、この揺動部材6に挿通された結合手段としてのヘッド支持部材8の係合部材30が揺動部材6に連動して揺動することになり、従って、ヘッド支持部材8全体が右方向(矢示R方向)に揺動することになる。
【0025】
このとき、ヘッド支持部材8の先端部に取り付けられているサーマルヘッド24の抵抗体22は、プラテン10に接触したまま前記右方向の揺動によってプラテン10の回転軸(図示せず)の回転方向の後方側にその接触位置を移動するものである。
【0026】
そして、揺転部材6の指示部20は、目盛り部14の右端部に位置し、このときの回転中心Oと抵抗体22との距離はD1となっている。従って、目盛り部14の位置における回転中心Oと抵抗体22との距離(位置関係)が関係付けられることになる。
【0027】
更に、係止ネジ21を締め付ければ、抵抗体22とプラテン10の位置関係は、それ以上動くことなく固定される。
【0028】
次に、係止ネジ21を弛め、係止ネジ21を持って、図2に示すように左方向(矢示L方向)に動かすと、揺動部材6が支軸4を支点として左方向に揺動し、指示部20が目盛り部14の中央部に位置するように位置決めすると、ヘッド支持部材8を介してサーマルヘッド24の抵抗体22は、プラテン10との接触位置を先の位置(図1の位置)より前方側へ移動して固定される。
【0029】
このとき、プラテン10の回転軸10(図示せず)の回転中心Oと抵抗体22との距離はD2となっている。
【0030】
図3に示すように係止ネジ21を持って、更に揺動部材6を左方向(矢示L方向)に揺動して指示部20が目盛り部14の左端部に位置するように位置決めすると、プラテン10の回転軸10(図示せず)の回転中心Oと抵抗体22との距離はD3となる。
【0031】
上述したように、係止ネジ21を持って揺動部材6を揺動するだけで、プラテン10の抵抗体22がプラテン10との接触位置を、回転軸(図示せず)の回転方向の前方側または後方側に移動するので、ヘッドの位置調整が容易なものである。
【0032】
更に、揺動部材6の指示部20を目盛り部14の目盛りに合わせて位置決めするだけで、前記プラテン10と抵抗体22との接触位置が、プラテン10の回転中心Oと抵抗体22との距離(D1〜D3)として得られるので、所望の位置への抵抗体22の位置決めが容易なものである。
【0033】
なお、揺動部材6の揺動支点としては、幅方向(矢示Y方向)に架設された支軸4を用いて説明したが、これに限定されないことは勿論であり、「ピン」を用いても可能である。
【0034】
また、指示部20を先細形状で説明したが、これに限定されないことは勿論であり、「支持部」側を円弧状にしてそこに「目盛り」を設け、本発明の実施の形態で説明した「目盛り部」側に針を固定しても「移動量」を示すことが可能である。
【0035】
【発明の効果】
本発明は、以上説明したように、プラテンローラの方向に揺動手段を揺動するだけで、この揺動手段の揺動に連動して結合手段が揺動し、サーマルヘッドの抵抗体とプラテンローラとの接触位置を抵抗体がプラテンローラに接触したまま移動するようにしたので、プラテンローラの回転軸の回転方向の前方側または後方側への抵抗体の位置移動が容易なものである。
【0036】
更に、移動手段に、移動量を示す指示部を側面に設けたので、この側面の指示部の移動量によってプラテンローラと抵抗体との接触位置が確認できるので、位置決めが容易である。
【図面の簡単な説明】
【図1】本発明のヘッド位置調整装置の側面図
【図2】同、側面図
【図3】同、側面図
【図4】同、図1中矢視IV−IV線に沿う部分断面図
【符号の説明】
1 ヘッド位置調整装置
2 支持機枠
4 支軸
6 揺動手段(揺動部材)
8 結合手段(ヘッド支持部材)
10 プラテン(プラテンローラ)
12 フレーム
14 目盛り部
16 開孔部(移動確認用)
17 開孔部(係止ネジ21用)
18 開孔部(ヘッド支持部材用)
19 開孔部(ヘッド支持部材用)
20 指示部
21 係止ネジ
22 抵抗体
24 サーマルヘッド
26 アングル部材
30 係合部材
X プラテン10の方向
Y 幅方向
R 右方向
L 左方向
O プラテン10の回転中心
D1、D2、D3 プラテン10の回転中心Oと抵抗体22との距離
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a head position adjusting device particularly in a thermal printer using a thermal head.
[0002]
[Prior art]
Conventionally, as this type of thermal printer, various printing media are passed between a platen roller (hereinafter simply referred to as a platen) and a thermal head pressed against the platen with a predetermined pressure, so that the price of printing media can be reduced. It is known that product information is printed as a barcode.
[0003]
However, when different types of printing media, such as labels and tags, are printed by such a thermal printer, the thickness, hardness, material, etc. of the printing media are different, so that each printing media is different between the thermal head and the platen. The optimum printing state corresponding to the printing medium could not be obtained.
[0004]
That is, when the platen is stationary, only the force that presses the platen is applied to the resistor of the thermal head, but when the platen rotates, the force along the rotation direction of the platen is applied to the resistor of the thermal head. It is assumed that this force affects the quality of the printing pressure. In this case, the platen is elastically deformed by being urged by the pressing force of the thermal head. However, if the printing medium that is interposed between the platen and the thermal head is a tag, the tag has a relatively large hardness, so The amount of elastic deformation is small. Conversely, if the print medium is a label, the label has a relatively low hardness, so that the amount of elastic deformation of the platen increases.
[0005]
Due to the difference in the amount of elastic deformation, the tag and label have different platen rotational force applied to the thermal head resistor, that is, the printing pressure. As a result, the tag and the label have poor print quality. It was.
[0006]
In order to solve the above-mentioned problems, the applicant has disclosed in Japanese Patent Laid-Open No. 4-357666 that the position of the resistor of the thermal head is moved to the front side or the rear side in the rotation direction of the rotation axis of the platen, so that various printing media can be used. Proposal for high quality printing.
[0007]
[Problems to be solved by the invention]
The present invention is an improvement of the above proposal, and the position of the thermal head resistor can be easily moved to the front side or the rear side in the rotational direction of the rotation axis of the platen in accordance with the thickness and hardness of the printing medium, Moreover, it is an object of the present invention to provide a head position adjusting device in a thermal printer that can confirm the moving position of the resistor.
[0008]
[Means for Solving the Problems]
The present invention has been made by paying attention to the above-described problems, and the position of the thermal head is variably set so that the resistor of the thermal head contacts the front side or the rear side in the rotation direction of the rotation axis of the platen roller. In the thermal printer head position adjusting device, one end is supported so as to be swingable in the direction of the platen roller, and the other end is provided with a swinging means on the side surface indicating an amount of movement, and interlocked with the swinging means. And a coupling means for changing the contact position between the resistor of the thermal head and the platen roller in accordance with the amount of movement of the indicator while the resistor is in contact with the platen roller .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A head position adjusting device in a thermal printer according to an embodiment of the present invention will be described with reference to FIGS.
[0010]
The head position adjusting device 1 mainly includes a support machine frame 2, a support shaft 4, a swinging member 6 as a swinging unit, and a head support member 8 as a coupling unit.
[0011]
The support machine frame 2 is fixed in the direction of the platen roller 10 (hereinafter simply referred to as “platen”) (in the direction indicated by the arrow X), more specifically in the direction substantially parallel to the frame 12. The support machine frame 2 is provided with a scale portion 14, an opening portion 16 for confirming movement, an opening portion 17 for a locking screw 21 described later, and an opening portion 18 for the head support member 8.
[0012]
The scale portion 14 and the aperture portions 16 and 17 have an arc shape with the support shaft 4 as a fulcrum, and the scale portion 14 is formed along the side of the arc of the aperture portion 16.
[0013]
An opening 19 for the head support member 8 is also provided in the frame 12 facing the support machine frame 2.
[0014]
The support shaft 4 is installed between the support machine frame 2 and the frame 12 so as to be substantially parallel to the platen 10.
[0015]
The swinging member 6 as the swinging means is provided between the support machine frame 2 and the frame 12 so that one end of the swinging member 6 is pivotally supported by the support shaft 4, and the support shaft 4 serves as a fulcrum. Oscillating substantially parallel to the support machine frame 2.
[0016]
Further, the other end portion of the swing member 6 is a tapered instruction portion 20, and when the swing member 6 swings with the support shaft 4 as a fulcrum, the movement position thereof is confirmed to move the support machine frame 2. It can be confirmed through the opening 16 for use.
[0017]
Further, since the scale portion 14 is formed along the side of the arc of the opening portion 16, the amount of movement when the swing member swings can be confirmed by the scale of the scale portion 14 indicated by the instruction portion 20. It has become.
[0018]
Reference numeral 21 denotes a locking screw. The locking screw 21 is inserted into the opening 17 of the support machine frame 2 and screwed into the swinging member 6. When the support machine frame 2 is sandwiched between the moving member 6, the swinging member 6 is fixed so as not to swing further, and the locking screw 21 is moved with a loose hand, the swinging member 6 is swung together. It is supposed to move.
[0019]
A thermal head 24 having a resistor 22 is attached to the front end portion of the head support member 8 as a coupling member in contact with the platen 10 facing the resistor 22, while an angle member 26 is attached to the rear end portion. The engagement member 30 is provided at the left and right side end portions in the width direction (arrow Y).
[0020]
One of the engaging members 30 is inserted into the opening 18 of the support machine frame 2 through the swinging member 6, and the other is inserted into the opening 19 of the frame 12. The moving member 6 moves in conjunction with the swinging motion.
[0021]
O represents the rotation center of a rotation shaft (not shown) of the platen 10.
[0022]
Next, the operation will be described.
[0023]
When the locking screw 21 is loosened and the locking screw 21 is held and moved in the right direction (arrow R direction) away from the platen 10 as shown in FIG. It swings in the right direction (arrow R direction) with the shaft 4 as a fulcrum.
[0024]
When the swinging member 6 swings, the engaging member 30 of the head support member 8 as a coupling means inserted through the swinging member 6 swings in conjunction with the swinging member 6, and accordingly, the head The entire support member 8 swings in the right direction (arrow R direction).
[0025]
At this time, the resistor 22 of the thermal head 24 attached to the distal end portion of the head support member 8 is in the rotational direction of the rotation axis (not shown) of the platen 10 by the rightward swing while being in contact with the platen 10. The contact position is moved to the rear side.
[0026]
And the instruction | indication part 20 of the rocking | swiveling member 6 is located in the right end part of the scale part 14, and the distance of the rotation center O and the resistor 22 at this time is D1. Therefore, the distance (positional relationship) between the rotation center O and the resistor 22 at the position of the scale portion 14 is related.
[0027]
Further, if the locking screw 21 is tightened, the positional relationship between the resistor 22 and the platen 10 is fixed without further movement.
[0028]
Next, when the locking screw 21 is loosened and the locking screw 21 is held and moved leftward (in the direction indicated by the arrow L) as shown in FIG. 2, the swinging member 6 moves leftward with the support shaft 4 as a fulcrum. When the positioning unit 20 is positioned so that the pointing unit 20 is positioned at the center of the scale unit 14, the resistor 22 of the thermal head 24 moves to the previous position (the position of the platen 10 through the head support member 8). The position is moved forward from the position in FIG.
[0029]
At this time, the distance between the rotation center O of the rotating shaft 10 (not shown) of the platen 10 and the resistor 22 is D2.
[0030]
As shown in FIG. 3, when the holding member 21 is held and the swinging member 6 is further swung leftward (in the direction indicated by the arrow L), the pointing unit 20 is positioned so as to be positioned at the left end of the scale unit 14. The distance between the rotation center O of the rotating shaft 10 (not shown) of the platen 10 and the resistor 22 is D3.
[0031]
As described above, by simply swinging the swing member 6 with the locking screw 21, the position of the resistor 22 of the platen 10 in contact with the platen 10 is changed to the front in the rotational direction of the rotary shaft (not shown). Since it moves to the side or the rear side, the position adjustment of the head is easy.
[0032]
Further, the position of contact between the platen 10 and the resistor 22 is determined by simply positioning the indicating portion 20 of the swinging member 6 in accordance with the scale of the scale portion 14, so that the distance between the rotation center O of the platen 10 and the resistor 22. Since it is obtained as (D1 to D3), positioning of the resistor 22 to a desired position is easy.
[0033]
Although the description has been given using the support shaft 4 installed in the width direction (arrow Y direction) as the swing support point of the swing member 6, the present invention is not limited to this, and “pins” are used. It is possible.
[0034]
In addition, the instruction unit 20 has been described with a tapered shape, but the present invention is not limited to this, and of course, the “support unit” side is formed in an arc shape, and a “scale” is provided there, which has been described in the embodiment of the present invention. Even if the needle is fixed to the “scale part” side, the “movement amount” can be indicated.
[0035]
【The invention's effect】
As described above, according to the present invention, only by swinging the swinging means in the direction of the platen roller, the coupling means swings in conjunction with the swinging of the swinging means. Since the resistor is moved while the resistor is in contact with the platen roller, the position of the resistor can be easily moved forward or backward in the rotation direction of the rotation axis of the platen roller.
[0036]
Furthermore, since the moving unit is provided with an indicating portion indicating the moving amount on the side surface, the contact position between the platen roller and the resistor can be confirmed by the moving amount of the indicating portion on the side surface , and positioning is easy.
[Brief description of the drawings]
FIG. 1 is a side view of a head position adjusting device of the present invention. FIG. 2 is a side view. FIG. 3 is a side view. FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG. Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head position adjustment apparatus 2 Support machine frame 4 Support shaft 6 Oscillating means (oscillating member)
8 Coupling means (head support member)
10 Platen (Platen roller)
12 Frame 14 Scale part 16 Opening part (for movement confirmation)
17 Opening part (for locking screw 21)
18 Opening (for head support member)
19 Opening (for head support member)
20 Instructing portion 21 Locking screw 22 Resistor 24 Thermal head 26 Angle member 30 Engaging member X Direction of platen 10 Width direction R Right direction L Left direction O Rotation center D1, D2, D3 of platen 10 Rotation center of platen 10 Distance between O and resistor 22

Claims (1)

サーマルヘッドの抵抗体がプラテンローラの回転軸の回転方向の前方側または後方側に接触するようサーマルヘッドの位置を可変して設定するサーマルプリンタにおけるヘッド位置調整装置において、プラテンローラの方向に揺動可能に一端部が支持され、他端部に移動量を示す指示部を側面に有する揺動手段と、この揺動手段に連動してサーマルヘッドの抵抗体とプラテンローラとの接触位置を前記抵抗体がプラテンローラに接触したまま前記指示部の移動量に合わせて変える結合手段と、から成ることを特徴とするサーマルプリンタにおけるヘッド位置調整装置。In a thermal printer head position adjustment device that changes and sets the position of the thermal head so that the resistor of the thermal head contacts the front side or the rear side in the rotational direction of the rotation axis of the platen roller, it swings in the direction of the platen roller. capable supported one end portion, and a swinging means having an instruction unit for indicating the amount of movement to the other end on the side surface, the resistance to the contact position between the resistor and the platen roller of the thermal head in conjunction with the swinging means A head position adjusting device in a thermal printer, comprising: coupling means for changing the body in accordance with the amount of movement of the indicating portion while the body is in contact with the platen roller .
JP26675196A 1996-09-17 1996-09-17 Head position adjustment device for thermal printer Expired - Lifetime JP3659535B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26675196A JP3659535B2 (en) 1996-09-17 1996-09-17 Head position adjustment device for thermal printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26675196A JP3659535B2 (en) 1996-09-17 1996-09-17 Head position adjustment device for thermal printer

Publications (2)

Publication Number Publication Date
JPH1086421A JPH1086421A (en) 1998-04-07
JP3659535B2 true JP3659535B2 (en) 2005-06-15

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ID=17435210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26675196A Expired - Lifetime JP3659535B2 (en) 1996-09-17 1996-09-17 Head position adjustment device for thermal printer

Country Status (1)

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JP (1) JP3659535B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4727292B2 (en) * 2005-05-12 2011-07-20 東芝テック株式会社 Thermal printer
JP5389695B2 (en) * 2010-03-02 2014-01-15 東芝テック株式会社 Thermal printer
JP5698473B2 (en) * 2010-07-22 2015-04-08 東芝テック株式会社 Printing unit and printing device
JP5821376B2 (en) 2010-08-17 2015-11-24 セイコーエプソン株式会社 printer
JP7307894B2 (en) * 2019-09-26 2023-07-13 大日本印刷株式会社 THERMAL TRANSFER SYSTEM AND THERMAL TRANSFER METHOD
CN114312037B (en) * 2021-12-28 2023-04-07 厦门汉印电子技术有限公司 Printer and printing method

Also Published As

Publication number Publication date
JPH1086421A (en) 1998-04-07

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