JPS60131264A - Thermal transfer printer - Google Patents

Thermal transfer printer

Info

Publication number
JPS60131264A
JPS60131264A JP58240612A JP24061283A JPS60131264A JP S60131264 A JPS60131264 A JP S60131264A JP 58240612 A JP58240612 A JP 58240612A JP 24061283 A JP24061283 A JP 24061283A JP S60131264 A JPS60131264 A JP S60131264A
Authority
JP
Japan
Prior art keywords
recording paper
smoothness
thermal transfer
printing
paper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP58240612A
Other languages
Japanese (ja)
Inventor
Takemi Yamamoto
山本　健美
Yasutaka Tomita
冨田　恭孝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP58240612A priority Critical patent/JPS60131264A/en
Priority to US06/681,584 priority patent/US4639152A/en
Publication of JPS60131264A publication Critical patent/JPS60131264A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PURPOSE:To obtain a constantly satisfactory quality of printing paper by detecting smoothness of a recording paper for a printing part and by controlling an operation of means to improve the smoothness and by improving the smoothness of a recording paper before printing. CONSTITUTION:Smoothness of a printing surface 11a of recording paper 11 is measured between front rollers 12, 13 and rear rollers 14, 15 with a sensor 10 and, if the degree of smoothness is under a fixed value, the paper is made smooth by pressurizing power P of pressure rollers 16, 17. If over the fixed value, the pressure roll 16 is lowered and it does not operate and the paper is sent by a platen 18 and a drop guide roller 19 to the space between the former and a heat transfer ribbon 21. And in order to print, the heat transfer ribbon 21 is pressed in the space between the recording paper 11 and the heating element at the tip of a thermal head 20 and transferring is carried out. Thus, a satisfactory quality of printing is always obtainable without being effected at all by the degree of smoothness of the recording paper to be used.

Description

【発明の詳細な説明】 ［技術分野］　。[Detailed description of the invention] [Technical field] .

この発明は、記録紙の平滑度を向」−させる手段を有す
る熱転写プリンターに関するものである。The present invention relates to a thermal transfer printer having means for improving the smoothness of recording paper.

［従来技術］ 従来この種の熱転写プリンターは、印字表面に凹凸のあ
る平滑度の低い記録紙に印字を行なう場合、第１．図に
示すように、プラテン１上に載置された凹凸を有する記
録紙２の表面に、サーマルヘッド３により熱転写リボン
４が押圧され、そして、サーマルヘッド３の先端部にあ
る発熱素子５が発熱すると、熱転写リボン４のインク６
が溶融して記録紙２に融着し、その後、剥離ローラ７を
通して熱転写リボン４を引張り記録紙２から引きはがす
と、ａ、ｂ、ｃ、ｄ、ｅのように転写される。[Prior Art] Conventionally, this type of thermal transfer printer has the following problems when printing on recording paper with uneven printing surface and low smoothness: As shown in the figure, a thermal transfer ribbon 4 is pressed by a thermal head 3 onto the uneven surface of a recording paper 2 placed on a platen 1, and a heating element 5 at the tip of the thermal head 3 generates heat. Then, the ink 6 on the thermal transfer ribbon 4
is melted and fused to the recording paper 2, and then when the thermal transfer ribbon 4 is pulled through the peeling roller 7 and peeled off from the recording paper 2, it is transferred as a, b, c, d, and e.

このとき、記録紙２の表面の凹凸のために、ｂのように
インクの厚さが薄かったり、Ｃのようにインクが部分的
に途切れたりする坦象が起こり、その結果、印字ＭＢ度
の低下、印字ムラ、文字の字欠は等が発生し、全体とし
て印字品質が大幅に低下する欠点があった。At this time, due to the unevenness of the surface of the recording paper 2, the thickness of the ink is thin as shown in b, or the ink is partially interrupted as shown in C, which results in the print MB degree being low. There were problems such as deterioration, uneven printing, missing characters, etc., and the overall printing quality was significantly reduced.

［目的］ この発明は、従来技術の欠点を解消するためになされた
ものであり、平滑度の低い記録紙を印字前に、その印字
面の平滑度を適宜向上させることにより、使用する記録
紙の平滑度に全く影響されることなく、常に良好な印字
品質を得ることができる熱転写プリンターを提供するも
のである。[Purpose] This invention was made in order to eliminate the drawbacks of the prior art, and it is possible to improve the smoothness of the printing surface of recording paper with low smoothness by appropriately improving it before printing. To provide a thermal transfer printer that can always obtain good printing quality without being affected by the smoothness of the printer.

［解決手段］ この発明は、前記目的を達成するために、印字部に供給
される記録紙の平滑度を検出する検出装置と、前記印字
部より手前において、前記記録紙の平滑度を向上させる
手段と、前記検出装置の検出結果により前記手段の動作
を制御する制御装置とを備え、印字前に記録紙の平滑度
を向上させ、その後にその記録紙が印字部へ送入される
ようにしたものである。[Solution Means] In order to achieve the above object, the present invention includes a detection device that detects the smoothness of recording paper supplied to a printing section, and a detection device that improves the smoothness of the recording paper in front of the printing section. and a control device that controls the operation of the means based on the detection result of the detection device, and improves the smoothness of the recording paper before printing, and then feeds the recording paper to the printing section. This is what I did.

［実施例］ ３− 以下にこの発明の一実施例を第２図乃至第４図を参照し
て詳細に説明する。[Embodiment] 3- An embodiment of the present invention will be described in detail below with reference to FIGS. 2 to 4.

第２図は熱転写プリンターを示しており、１Ｏは記録紙
１１の印字部１１ａの平滑度を測定する反射型のセンＶ
−で、一対の前方ローラ１２，１３と一対の後方ローラ
１４．１５との間に設けられている。前方ローラ１２．
１３は記録紙１１にパックテンションをかける機能を有
し、前方ローラ１２．１３と後方ローラ１４．１５との
間の記録紙１１に適度の張力を付与し、平滑度の測定の
正確度を向−卜させている。FIG. 2 shows a thermal transfer printer, and 1O is a reflective sensor V for measuring the smoothness of the printed portion 11a of the recording paper 11.
- between the pair of front rollers 12, 13 and the pair of rear rollers 14,15. Front roller 12.
13 has a function of applying pack tension to the recording paper 11, and applies an appropriate tension to the recording paper 11 between the front roller 12.13 and the rear roller 14.15 to improve the accuracy of smoothness measurement. -I'm showing it.

１６．１７は記録紙１１を加圧して記録紙１１を平滑化
する加圧ローうで、記録紙の平滑化装置を構成する。加
圧ローラ１６は反射型のセンサー１Ｏにより記録紙１１
の平滑度が一定値（例えばベック平滑度で５３　ｓｅｃ
、）以下の場合、加圧ローラ１７と協働して記録紙１１
を加圧力Ｐで加圧する。また、記録紙１１の平滑度が一
定値（５０ｓｅＣ０）以上の場合、加圧ローラ１６が下
方に移動して記録紙１１を加圧しない。尚、加圧ローラ
１６−４＝ が移動するかしないかを決定する平滑度の値（前記の一
定値）は、適宜変更することができる。Reference numerals 16 and 17 are pressure rows that apply pressure to the recording paper 11 to smooth the recording paper 11, and constitute a recording paper smoothing device. The pressure roller 16 presses the recording paper 11 using a reflective sensor 1O.
The smoothness is a constant value (for example, Beck smoothness is 53 sec
,) In the following cases, the recording paper 11 works in cooperation with the pressure roller 17.
is pressurized with pressure P. Further, when the smoothness of the recording paper 11 is equal to or higher than a certain value (50 secC0), the pressure roller 16 moves downward and does not press the recording paper 11. Note that the smoothness value (the above-mentioned constant value) that determines whether the pressure roller 16-4 moves or not can be changed as appropriate.

１８はプラテンで、紙押えローラ１９と協動して記録紙
１１を挟持し記録紙１１をプラテン１８とり゛−マルヘ
ッド２０との問を通し更に矢印Ｑ方向に送る。２１はサ
ーマルヘッド２０によって記録紙１１に押圧されると共
に加熱される熱転写リボンである。Reference numeral 18 denotes a platen which, in cooperation with a paper pressing roller 19, clamps the recording paper 11 and sends the recording paper 11 further in the direction of arrow Q through the platen 18 and the multi-head 20. A thermal transfer ribbon 21 is pressed against the recording paper 11 and heated by the thermal head 20.

このように構成された熱転写プリンターの印字工程を説
明すると、まず、紙送入口（図示せず）から供給された
記録紙１１は、前方ローラ１２゜１３と後方ローラ１４
，１５との間でセンサー１０により印字面１１ａの平滑
度が測定される。次に、その平滑度が５０ｓｅｃ、以下
の場合、第３図に示すように、記録紙１１は加圧ローラ
１６．１７によって加圧力Ｐで平滑化され、また、印字
面１１ａの平滑度が５０　ｓｅｃ０以上の場合は、加圧
ローラ１６が第３図において破線で示される位置まで移
動して、記録紙１１を加圧しない。更に、記録紙１１は
プラテン１８と紙押えローラ１９によりプラテン１８と
熱転写リボン２１との間に送入される。そして、印字時
には、熱転写リボン２１が記録紙１１とサーマルヘッド
２Ｏの先端部に設りられた発熱素子２２との間で押圧さ
れて、発熱素子２２が発熱し、その熱は熱転写リボン２
１のフィルム２１ａを通してインク２１ｂに伝わり、そ
れによってインク２１ｂが溶融して記録紙１１に融着し
、その後、剥離ローラ２３を通して熱転写リボン２１を
引張り記録紙１１から引きはがすと、平滑になった記録
紙１１の印字部１１ａに所望の幅で且つ所定の厚さを有
するインクａ’、　ｂ’、　ｃ′。To explain the printing process of the thermal transfer printer configured in this way, first, the recording paper 11 fed from the paper feed port (not shown) is moved between the front rollers 12 and 13 and the rear roller 14.
, 15, the smoothness of the printing surface 11a is measured by the sensor 10. Next, when the smoothness is 50 seconds or less, the recording paper 11 is smoothed by pressure rollers 16 and 17 with a pressure P as shown in FIG. In the case of sec0 or more, the pressure roller 16 moves to the position shown by the broken line in FIG. 3 and does not press the recording paper 11. Furthermore, the recording paper 11 is fed between the platen 18 and the thermal transfer ribbon 21 by the platen 18 and paper press roller 19. During printing, the thermal transfer ribbon 21 is pressed between the recording paper 11 and the heating element 22 provided at the tip of the thermal head 2O, the heating element 22 generates heat, and the heat is transferred to the thermal transfer ribbon 2.
The ink 21b is transferred to the ink 21b through the film 21a of No. 1, and the ink 21b is melted and fused to the recording paper 11. Then, when the thermal transfer ribbon 21 is pulled through the peeling roller 23 and peeled off from the recording paper 11, a smooth recording is created. Inks a', b', c' having a desired width and a predetermined thickness are applied to the printed portion 11a of the paper 11.

ｄ’、　ｅ’等が転写される。d', e', etc. are transferred.

また、より一層平滑度を高めたいときは、第５図に示す
ようにすれば良い。即ち、記録紙１１は前方ローラ３３
．３１と後方ローラ３２．３３との間で反射型のセンサ
ー３４によって印字面１１ａの平滑度が測定され、その
平滑度が例えば６０ｓｅｃ、以下のときは、ベルトロー
ラ３５．３６により回転する加湿フェルトベルト３７と
第１ピンチローラ３８とにより記録紙１１が加湿膨潤さ
れそして、内部に発熱体３９．４０をそれぞれ有する一
対の加熱加圧ローラ４１，４２によって加圧力Ｐで加圧
されて平滑化される。また、平滑度が６Ｑｓｅｃ、以上
の場合は、加湿フェルトベルト３７前後に設置ノられた
第２ピンチローラ４３．第３ピンチローラ４４と第１ピ
ンチローラ３８とが、破線矢印方向にそれぞれ移動し、
記録紙１１が破線の位置に移動されて加湿されなくなり
、更に、加熱加圧ローラ４１が破線矢印方向に移動する
と共に発熱体３９．４０も発熱しなくなる。Further, if it is desired to further increase the smoothness, the method shown in FIG. 5 may be used. That is, the recording paper 11 is moved by the front roller 33
．． The smoothness of the printing surface 11a is measured by a reflective sensor 34 between the rear roller 31 and the rear roller 32, 33, and if the smoothness is less than, for example, 60 seconds, the humidifying felt belt rotated by the belt roller 35, 36 is detected. 37 and the first pinch roller 38, the recording paper 11 is humidified and swollen, and is smoothed by being pressed with a pressure P by a pair of heating pressure rollers 41 and 42 each having a heating element 39 and 40 inside. . If the smoothness is 6Qsec or more, the second pinch rollers 43 installed before and after the humidifying felt belt 37. The third pinch roller 44 and the first pinch roller 38 each move in the direction of the dashed arrow,
The recording paper 11 is moved to the position indicated by the broken line and is no longer humidified, and furthermore, the heating pressure roller 41 is moved in the direction of the broken line arrow and the heating elements 39 and 40 also stop generating heat.

そして、記録紙１１はプラテン４５と紙押えローラ４６
によりプラテン４５と熱□転写リボン４７との間に送入
される。印字時には、熱転写リボン４７が記録紙１１と
サーマルヘッド４８との間で押圧されて、サーマルヘッ
ド４８によって熱転写リボン４７のインクが記録紙１１
に転写される。The recording paper 11 is held between a platen 45 and a paper presser roller 46.
is fed between the platen 45 and the thermal □ transfer ribbon 47. During printing, the thermal transfer ribbon 47 is pressed between the recording paper 11 and the thermal head 48, and the thermal head 48 transfers ink from the thermal transfer ribbon 47 to the recording paper 11.
transcribed into.

更に、他の実施例として、第６図乃至第８図に示すよう
に、記録紙１１の印字部１１ａのみを平滑化するものも
考えられる。Furthermore, as another example, as shown in FIGS. 6 to 8, it is also possible to smooth only the printed portion 11a of the recording paper 11.

記録紙１１は前方ローラ５０．５１と後方ローラ５２と
の間で、反射型のセンサー５４によって印字面１１ａの
平滑度が測定され、その平滑度が例えば７０ｓｅｃ、以
下のときは、第７図に示すように、一対の塗工ローラ５
５．５６によって記録紙１１の印字面１１ａにコーティ
ング剤５７が塗工され、熱風送風機５８によってそのコ
ーティング剤５７が乾燥される。尚、塗工ローラ５５は
コーティング剤５７の補給をするための補給装置５９と
接している。このとき、コーティング剤５７としては、
炭酸カルシウムや酸化チタン等のテン利。The smoothness of the printing surface 11a of the recording paper 11 is measured by a reflective sensor 54 between the front roller 50, 51 and the rear roller 52. If the smoothness is less than 70 seconds, for example, the smoothness is shown in FIG. As shown, a pair of coating rollers 5
The coating agent 57 is applied to the printing surface 11a of the recording paper 11 by step 5.56, and the coating agent 57 is dried by the hot air blower 58. The coating roller 55 is in contact with a replenishment device 59 for replenishing the coating agent 57. At this time, as the coating agent 57,
Tenants such as calcium carbonate and titanium oxide.

樹脂及びワックスなどが良い。また、平滑度が７Ｑｓｅ
ｃ、以上の場合は、塗工ローラ５５が破線矢印方向に移
動して記録紙１１にコーティング剤５７が塗工されない
ようにし、熱風送風機５８の電源も切る。Resin and wax are good. Also, the smoothness is 7Qse
c. In the above case, the coating roller 55 moves in the direction of the dashed arrow to prevent the coating agent 57 from being applied to the recording paper 11, and the power to the hot air blower 58 is also turned off.

そして、記録紙１１はプラテン６０と紙押えローラ６１
によりプラテン６０と熱転写リボン６２との間に送入さ
れる。印字時には、熱転写リボン６２が記録紙１１とサ
ーマルヘッド６３の先端の発熱索子６４との間で押圧さ
れて、その発熱素子−／　− ６４が発熱し、その熱が熱転写リボン６２のフィルム６
２ａを通してインク６２ｂに伝わり、それによってイン
ク６２ｂが溶融して記録紙１１に融着し、その後、剥離
ローラ６５を通して熱転写リボン６２を引張り記録紙１
１から引きはがすと、記録紙１１にインク６２ａが転写
される。The recording paper 11 is held between a platen 60 and a paper presser roller 61.
The thermal transfer ribbon 62 is fed between the platen 60 and the thermal transfer ribbon 62. During printing, the thermal transfer ribbon 62 is pressed between the recording paper 11 and the heating element 64 at the tip of the thermal head 63, the heating element -/- 64 generates heat, and the heat is transferred to the film 6 of the thermal transfer ribbon 62.
2a to the ink 62b, which melts the ink 62b and fuses it to the recording paper 11. Thereafter, the thermal transfer ribbon 62 is pulled through the peeling roller 65 and released onto the recording paper 1.
When the paper 1 is peeled off, the ink 62a is transferred onto the recording paper 11.

尚、前記各実施例では、平滑度を検出するだめの検出装
置として反射型のセンサーを使用したが他のセンサーで
も良いことはいうまでもない。Incidentally, in each of the above embodiments, a reflection type sensor is used as a detection device for detecting the smoothness, but it goes without saying that other sensors may be used.

［効果］ 以上に詳述したように、この発明は、印字部に供給され
る記録紙の平滑度を検出する検出装置と、前記印字部よ
り手前において、前記記録紙の平滑度を向上させる手段
と、前記検出装置の検出結果により前記手段の作動を制
御する制御装置とを備えたので、平滑度の低い記録紙を
使用する場合だけ、自動的に印字前の記録紙表面の平滑
度を向上させることができるため、平滑度の高い記録紙
に対する不必要な平滑化工程を省くことができ、且つ使
用する記録紙の平滑度に全く影響されること８− なく、常に良好な印字品質を得ることができるなど、そ
の奏する効果は極めて大である。[Effects] As detailed above, the present invention includes a detection device for detecting the smoothness of the recording paper supplied to the printing section, and a means for improving the smoothness of the recording paper before the printing section. and a control device that controls the operation of the means based on the detection result of the detection device, so that the smoothness of the surface of the recording paper before printing is automatically improved only when recording paper with low smoothness is used. This makes it possible to eliminate unnecessary smoothing processes for highly smooth recording paper, and to always obtain good print quality without being affected at all by the smoothness of the recording paper used. The effect it has is extremely great.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の印字状態を示す図、第２図はこの発明の
第１実施例の熱転写プリンターを示す図、第３図は第２
図の要部拡大図、第４図はその印字状態を示す図、第ｉ
はこの発明の第２実施例の熱転写プリンターを示す図、
第６図はこの発明の第３実施例の熱転写プリンターを示
す図、第７図は第６図の要部拡大図、第８図はその印字
状態を示す図である。 １０．３４．５４はセンサー、１１は記録紙、１６．１
７は加圧ローラ、１８．４５．６０はプラテン、２０．
４８．６３はサーマルヘッド、２１．４７．６２は熱転
写リボン、３６は加湿フェルトベルト、３８，４３．４
４はピンチローラ、４１．４２は加熱加圧ローラ、５５
．５６は塗工ローラ、５８は熱風送風機である。 味 −二凝一FIG. 1 is a diagram showing a conventional printing state, FIG. 2 is a diagram showing a thermal transfer printer according to the first embodiment of the present invention, and FIG. 3 is a diagram showing a second embodiment of the thermal transfer printer.
An enlarged view of the main part of the figure, Figure 4 is a diagram showing the printing state,
is a diagram showing a thermal transfer printer according to a second embodiment of the present invention,
FIG. 6 is a diagram showing a thermal transfer printer according to a third embodiment of the present invention, FIG. 7 is an enlarged view of the main part of FIG. 6, and FIG. 8 is a diagram showing the printing state thereof. 10.34.54 is the sensor, 11 is the recording paper, 16.1
7 is a pressure roller, 18.45.60 is a platen, 20.
48.63 is a thermal head, 21.47.62 is a thermal transfer ribbon, 36 is a humidifying felt belt, 38, 43.4
4 is a pinch roller, 41.42 is a heating pressure roller, 55
．． 56 is a coating roller, and 58 is a hot air blower. Taste - Nikoichi

Claims (1)

【特許請求の範囲】 １、印字部に供給される記録紙の平滑度を検出する検出
装置と、前記印字部より手前において、前記記録紙の平
滑度を向上させる手段と、前記検出装置の検出結果によ
り前嗣手段の作動を制御する制御装置とを備えたことを
特徴とする熱転写プリンター。 ２、前記手段として、加圧装置を使用したことを特徴と
する特許請求の範囲第１項記載の熱転写プリンター。 ３、前記手段として、加湿装置及び加圧装置を使用した
ことを特徴とする特許請求の範囲第１項記載の熱転写プ
リンター。　。 ４、前記手段として、加熱装置を並設したことを特徴と
する特許請求の範囲第３項記載の熱転写プリンター。 ５、前記手段として、記録紙にコーティング剤を塗工す
る塗工装置を使用したことを特徴とする特許請求の範囲
第１項記載の熱転写プリンター。[Scope of Claims] 1. A detection device for detecting the smoothness of the recording paper supplied to the printing section, a means for improving the smoothness of the recording paper before the printing section, and a detection device for the detection device. 1. A thermal transfer printer comprising: a control device for controlling the operation of a successor means according to a result. 2. The thermal transfer printer according to claim 1, wherein a pressure device is used as the means. 3. The thermal transfer printer according to claim 1, wherein a humidifying device and a pressurizing device are used as the means. . 4. The thermal transfer printer according to claim 3, wherein a heating device is provided in parallel as the means. 5. The thermal transfer printer according to claim 1, wherein a coating device for applying a coating agent to recording paper is used as the means.
JP58240612A 1983-12-20 1983-12-20 Thermal transfer printer Pending JPS60131264A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP58240612A JPS60131264A (en) 1983-12-20 1983-12-20 Thermal transfer printer
US06/681,584 US4639152A (en) 1983-12-20 1984-12-14 Printing apparatus with a thermal print head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58240612A JPS60131264A (en) 1983-12-20 1983-12-20 Thermal transfer printer

Publications (1)

Publication Number Publication Date
JPS60131264A true JPS60131264A (en) 1985-07-12

Family

ID=17062082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58240612A Pending JPS60131264A (en) 1983-12-20 1983-12-20 Thermal transfer printer

Country Status (1)

Country Link
JP (1) JPS60131264A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4844632A (en) * 1985-08-29 1989-07-04 Kabushiki Kaisha Seiko Epson Head biasing mechanism in a thermal printer
US5109236A (en) * 1988-08-31 1992-04-28 Canon Kabushiki Kaisha Smoothness measuring device and recording apparatus to which the smoothness measuring device is applied
WO1996012621A1 (en) * 1994-10-20 1996-05-02 Omron Corporation Printing device and postage franking machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4844632A (en) * 1985-08-29 1989-07-04 Kabushiki Kaisha Seiko Epson Head biasing mechanism in a thermal printer
US5109236A (en) * 1988-08-31 1992-04-28 Canon Kabushiki Kaisha Smoothness measuring device and recording apparatus to which the smoothness measuring device is applied
WO1996012621A1 (en) * 1994-10-20 1996-05-02 Omron Corporation Printing device and postage franking machine

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