JPH1058840A - Overwrite printing method for reversible heat sensitive recording medium - Google Patents

Overwrite printing method for reversible heat sensitive recording medium

Info

Publication number
JPH1058840A
JPH1058840A JP22513596A JP22513596A JPH1058840A JP H1058840 A JPH1058840 A JP H1058840A JP 22513596 A JP22513596 A JP 22513596A JP 22513596 A JP22513596 A JP 22513596A JP H1058840 A JPH1058840 A JP H1058840A
Authority
JP
Japan
Prior art keywords
printing
recording medium
thermal head
reversible thermosensitive
thermosensitive recording
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.)
Granted
Application number
JP22513596A
Other languages
Japanese (ja)
Other versions
JP3877239B2 (en
Inventor
Haruhiko Osawa
晴彦 大澤
Tatsuya Ogawa
達也 小川
Shinichi Koizumi
真一 小泉
Hiroyuki Morinaka
宏幸 森中
Minoru Fujita
実 藤田
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.)
Kyodo Printing Co Ltd
Original Assignee
Kyodo Printing Co 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 Kyodo Printing Co Ltd filed Critical Kyodo Printing Co Ltd
Priority to JP22513596A priority Critical patent/JP3877239B2/en
Publication of JPH1058840A publication Critical patent/JPH1058840A/en
Application granted granted Critical
Publication of JP3877239B2 publication Critical patent/JP3877239B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To perform a clear printing/deletion from the starting point in an overwrite printing by a method wherein in a reversible heat sensitive recording medium, a pre-heating region is provided at a forward location in the running direction, and a printing region is provided behind the pre-heating region, and the pre-heating region is heated in advance by supplying an energy under a state wherein a thermal head is brought into contact with the pre-heating region before reaching the printing region. SOLUTION: For this reversible heat sensitive recording medium, a reversible heat sensitive recording medium for which a recording region for a reversible heat sensitive recording, and a pre-heating region which is located at a forward location in the running direction when a recording is performed, are provided, is used and at a stage when the pre-heating region has reached the location of a thermal head, the feeding of a pre-heating energy to the thermal head, is started, and when the recording region has reached the location of the thermal head, a recording energy to perform a specified recording, is fed to the thermal head. By doing so, an overwrite printing for the reversible heat sensitive recording medium is performed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、温度の変化により透明
度を変化させることで所望の文字、数字、記号、パター
ン等(以下「文字等」と記す)を可逆的に書き込むこと
が可能な可逆性感熱記録媒体に対して印字する方法に関
し、とくに既に印字されている文字等を消去しながら新
たな文字等をオーバーライト印字する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversible type in which desired characters, numerals, symbols, patterns, etc. (hereinafter referred to as "characters, etc.") can be reversibly written by changing the transparency by changing the temperature. The present invention relates to a method of printing on a thermosensitive recording medium, and more particularly to a method of overwriting new characters and the like while erasing characters and the like already printed.

【0002】[0002]

【従来の技術】可逆性感熱記録媒体は、その表面をサー
マルヘッドで走査することで所望の印字を行うことがで
き、また不要な文字等を消去してそのあとに別の文字等
を記録できるという利点のために、とくにカードの形態
として広範な用途がある。
2. Description of the Related Art A reversible thermosensitive recording medium can perform desired printing by scanning the surface of the recording medium with a thermal head, and can erase unnecessary characters and then record another character and the like. Due to this advantage, there are a wide range of uses, especially in the form of cards.

【0003】ここで、「可逆性感熱記録媒体」とは、図
3に示すように、温度T1では白濁状態であり、これを
温度T2からT3の範囲内に加熱し、ついで常温に戻すと
透明状態になり、また温度T4以上に加熱し、ついで常
温に戻すと白濁状態になるという変化を示し、これを可
逆的に繰り返すことができるものを意味する。
As shown in FIG. 3, the "reversible thermosensitive recording medium" is in a cloudy state at a temperature T1, and is heated to a temperature within a range from a temperature T2 to a temperature T3. State, and when the temperature is raised to a temperature equal to or higher than T4 and then returned to room temperature, the state changes to a cloudy state, which means that this can be repeated reversibly.

【0004】このような可逆性感熱記録媒体において、
最初に所望の文字等を印字した後に、この文字等を消去
すると同時に新たな文字等を印字する、いわゆるオーバ
ーライト(重ね書き)印字を行う場合には、複数の加熱
素子をライン状に配列したサーマルヘッドを使用し、各
加熱素子に対して、消去領域では透明状態が得られる小
さいエネルギーを、また記録領域では白濁状態が得られ
る大きいエネルギーをそれぞれ供給して、可逆性感熱記
録媒体に既に形成されていた文字等を消去すると同時
に、新たな文字等を印字する。
In such a reversible thermosensitive recording medium,
When a desired character or the like is first printed, and then this character or the like is erased and a new character or the like is printed at the same time, that is, when performing so-called overwrite (overwrite) printing, a plurality of heating elements are arranged in a line. Using a thermal head, each heating element is supplied with a small amount of energy to obtain a transparent state in the erasing area and a large amount of energy in the recording area to obtain a cloudy state. A new character or the like is printed at the same time as the erased character or the like.

【0005】[0005]

【発明が解決しようとする課題】しかしながらサーマル
ヘッドの各加熱素子は、その比較的大きい熱容量のため
に、印字または消去に必要な温度に到達するまでにある
程度の時間が必要であり、したがって可逆性感熱記録媒
体の印字または消去を行うべき領域に到達した時点で加
熱のためのエネルギーが供給されても、所望の印字また
は消去が行えないという特性をもつ。
However, each heating element of the thermal head requires a certain amount of time to reach a temperature required for printing or erasing due to its relatively large heat capacity, and therefore, a reversible feeling is required. Even when energy for heating is supplied at the time when the thermal recording medium reaches a region where printing or erasing is to be performed, desired printing or erasing cannot be performed.

【0006】このようなエネルギー供給から所定温度に
到達するまでのタイムラグの影響をなくすために、サー
マルヘッドの各加熱素子に、あらかじめエネルギーを供
給して蓄熱させておくことも考えられるが、印字または
消去の必要のない待機時間にもエネルギーが供給され続
けるので、電力消費量が増大するばかりでなく、常に加
熱しておくことによりサーマルヘッドの寿命が短くなる
という欠点がある。
In order to eliminate the influence of the time lag from when the energy is supplied to when the temperature reaches the predetermined temperature, it is conceivable to supply energy to each heating element of the thermal head in advance and store the heat. Since the energy is continuously supplied during the standby time when erasure is not required, not only the power consumption is increased, but also the life of the thermal head is shortened due to the constant heating.

【0007】この欠点を解消するために、可逆性感熱記
録媒体に印字すべきデータを解析して、サーマルヘッド
の各加熱素子に必要なエネルギーを予測して、実際の印
字または消去に先立って加熱するような制御を行うプロ
グラムを実行する演算装置をサーマルプリンタに搭載し
ておくことも提案されている(たとえば特願平2−27
89号公報参照)。
In order to solve this drawback, the data to be printed on the reversible thermosensitive recording medium is analyzed, the energy required for each heating element of the thermal head is estimated, and the heating is performed prior to the actual printing or erasing. It has also been proposed to mount an arithmetic unit for executing a program for performing such control in a thermal printer (for example, Japanese Patent Application No. Hei 2-27).
No. 89).

【0008】この場合には、前述のようなエネルギーの
無駄な消費は回避できるが、隣接する加熱素子からの熱
の影響も無視できないばかりでなく、可逆性感熱記録媒
体の特性としてそれ以前の印字の履歴によって印字また
は消去の特性が変化するので、膨大なプログラムを組ん
だとしても、予熱の精度を高めて所定の効果を得るのは
きわめて困難である本発明の目的は、前述のような従来
のオーバーライト印字の欠点を解消し、簡単な制御で確
実に消去および印字を行うことができる可逆性感熱記録
媒体のオーバーライト印字方法を提供することである。
In this case, the wasteful consumption of energy as described above can be avoided, but the influence of heat from an adjacent heating element cannot be ignored, and the characteristics of the reversible thermosensitive recording medium are not limited to the previous printing. Since the characteristics of printing or erasing change depending on the history of the program, it is extremely difficult to obtain a predetermined effect by increasing the accuracy of preheating even if a large number of programs are formed. An object of the present invention is to provide a method for overwriting printing on a reversible thermosensitive recording medium, which can eliminate the drawbacks of overwriting printing described above and can perform erasure and printing reliably with simple control.

【0009】[0009]

【課題を解決するための手段】本発明によれば、基材の
一方の面に可逆性感熱記録層を有する可逆性感熱記録媒
体に対してサーマルヘッドを相対的に移動させることに
よりオーバーライト印字を行う方法であって、可逆性感
熱記録媒体として、可逆性感熱記録のための記録領域
と、この記録が行われる際の走行方向に関して前方に位
置する予熱領域とを設けた可逆性感熱記録媒体を使用
し、前記サーマルヘッドの位置に前記予熱領域が到達し
た段階で前記サーマルヘッドに予熱エネルギーの供給を
開始し、前記サーマルヘッドの位置に前記記録領域が到
達したときに前記サーマルヘッドに所定の記録を行うた
めの記録エネルギーを供給すること、を特徴とする可逆
性感熱記録媒体のオーバーライト印字方法が提供され
る。
According to the present invention, overwrite printing is performed by moving a thermal head relatively to a reversible thermosensitive recording medium having a reversible thermosensitive recording layer on one surface of a substrate. A reversible thermosensitive recording medium comprising, as a reversible thermosensitive recording medium, a recording area for reversible thermosensitive recording, and a preheating area positioned forward with respect to a traveling direction when the recording is performed. When the preheating area reaches the position of the thermal head, the supply of preheating energy to the thermal head is started, and when the recording area reaches the position of the thermal head, a predetermined amount of heat is supplied to the thermal head. The present invention provides a method for overwriting printing on a reversible thermosensitive recording medium, which comprises supplying recording energy for performing recording.

【0010】すなわち本発明においては、可逆性感熱記
録媒体に対して所望の印字を行うのに際して、この可逆
性感熱記録媒体の走行方向に関して前方の位置に予熱領
域を、その後方に印字領域を設け、サーマルヘッドが実
際に印字または消去を行う直前の段階で、各加熱素子を
所定の温度まで予熱する。この予熱温度としては、白濁
状態が得られる温度とするのがよく、具体的には印字エ
ネルギーと同等のエネルギーをサーマルヘッドに印加す
る。したがって、サーマルヘッドが予熱領域の終端に達
したときには、各加熱素子の温度はすでに印字(白濁
化)温度に達して安定しているため、その後方の印字領
域では所定のエネルギーを供給するだけで、プログラム
による制御等の必要がなく、確実な印字または消去を行
うことが可能である。
That is, in the present invention, when performing desired printing on a reversible thermosensitive recording medium, a preheating area is provided at a position in front of the running direction of the reversible thermosensitive recording medium, and a printing area is provided behind the preheating area. At a stage immediately before the thermal head actually performs printing or erasing, each heating element is preheated to a predetermined temperature. The preheating temperature is preferably a temperature at which a cloudy state is obtained. Specifically, energy equivalent to the printing energy is applied to the thermal head. Therefore, when the thermal head reaches the end of the preheating area, the temperature of each heating element has already reached the printing (white turbidity) temperature and has been stabilized. It is possible to perform reliable printing or erasing without the need for control by a program.

【0011】また予熱はサーマルヘッドの全ての加熱素
子について均等に行えばよく、さらにサーマルヘッドに
印加するエネルギーは予熱も含めて印字エネルギーと消
去エネルギーの2種類でよいので、その制御はきわめて
簡単である。
The preheating may be performed uniformly for all the heating elements of the thermal head, and the energy applied to the thermal head may be two types, including preheating and printing energy and erasing energy. is there.

【0012】[0012]

【発明の実施の形態】図1は、本発明の方法にしたがっ
てオーバーライト印字を行うための可逆性感熱記録媒体
の一例を示し、この可逆性感熱記録媒体の少なくとも一
方の面に、オーバーライト時の走行方向すなわち印字方
向に関して前方の位置に予熱領域が、またその後方の位
置に印字領域がそれぞれ設けられている。
FIG. 1 shows an example of a reversible thermosensitive recording medium for performing overwrite printing according to the method of the present invention. A preheating region is provided at a position forward of the traveling direction, that is, a printing direction, and a printing region is provided at a position behind the preheating region.

【0013】この例では、印字領域は可逆性感熱記録媒
体の全幅よりもやや狭い幅と、全長の約3/4の長さを
有する長方形の形態を有し、予熱領域はその残りの部分
全体を占めている。予熱領域の幅は、少なくとも印字領
域の幅と同じであればよく、また長さは、サーマルヘッ
ドの各加熱素子を、常温から所望の予熱温度まで上昇さ
せるのに必要な時間に応じて決定される。
In this example, the printing area has a rectangular shape having a width slightly smaller than the entire width of the reversible thermosensitive recording medium and a length of about / of the total length, and the preheating area has the entire remaining portion. Occupy. The width of the preheating area may be at least the same as the width of the printing area, and the length is determined according to the time required to raise each heating element of the thermal head from room temperature to a desired preheating temperature. You.

【0014】図2は、この可逆性感熱記録媒体の層構成
を示している。図2において、符号1で示す基材上に、
金属蒸着層2、可逆性感熱記録層3、および保護層4が
この順序で形成され、所望の印字領域を除く部分に、必
要に応じて、印刷層5および印刷保護層6が設けられて
いる。印刷層5は、予熱中のサーマルヘッドとの接触に
よって予熱領域、すなわち印字領域以外の領域に何らか
のマークが形成されたときに、これを外部からは目視で
きないようにする隠蔽の目的で設けられるもので、本発
明において必須のものではない。
FIG. 2 shows the layer structure of the reversible thermosensitive recording medium. In FIG. 2, on a substrate indicated by reference numeral 1,
The metal deposition layer 2, the reversible thermosensitive recording layer 3, and the protective layer 4 are formed in this order, and a print layer 5 and a print protective layer 6 are provided as necessary in portions other than a desired print area. . The printing layer 5 is provided for the purpose of concealment such that when any mark is formed in a preheating area, that is, an area other than the printing area due to contact with the thermal head during preheating, the mark is not visible from the outside. It is not essential in the present invention.

【0015】基材1として、たとえばポリエチレンテレ
フタレート、エポキシ樹脂、ポリ塩化ビニルおよびポリ
カーボネート等の合成樹脂シート、あるいは合成紙等を
用いることができる。
As the substrate 1, for example, a synthetic resin sheet such as polyethylene terephthalate, epoxy resin, polyvinyl chloride and polycarbonate, or synthetic paper can be used.

【0016】金属蒸着層2は、アルミニウム、スズ等の
金属を蒸着により数百オングストローム、好ましくは3
00〜1000オングストロームの厚さに形成され、そ
の上に形成される可逆性感熱記録層4の文字等の情報を
反射光で見やすくするものである。
The metal deposition layer 2 is formed by depositing a metal such as aluminum, tin or the like by several hundred angstroms, preferably 3 to 3 Å.
It is formed to a thickness of 00 to 1000 angstroms, and makes it easy to see information such as characters on the reversible thermosensitive recording layer 4 formed thereon by reflected light.

【0017】可逆性感熱記録層3は、樹脂Aからなる樹
脂母材、有機低分子物質、および必要に応じて添加され
る低Tg樹脂を有機溶剤に溶解した塗料を用い、金属蒸
着層3上に、ワイヤーバーのような適宜の塗布手段によ
り塗布、乾燥して、たとえば厚さ約5μmの厚さに設け
られる。
The reversible thermosensitive recording layer 3 is formed on a metal vapor-deposited layer 3 by using a resin base material composed of resin A, a low-molecular organic substance, and a coating material in which a low Tg resin added as necessary is dissolved in an organic solvent. Then, it is coated with an appropriate coating means such as a wire bar and dried to be provided in a thickness of, for example, about 5 μm.

【0018】保護層4は、可逆性感熱記録層3を保護し
たり、その上に設けられる印刷層5の密着性を向上させ
るために必要に応じて設けられる。印刷保護層6は、印
刷層5を保護するためのものである。
The protective layer 4 is provided as needed to protect the reversible thermosensitive recording layer 3 and to improve the adhesion of the printing layer 5 provided thereon. The print protection layer 6 is for protecting the print layer 5.

【0019】実際のオーバーライト操作は、図1および
図2に示した可逆性感熱記録媒体を、予熱領域が先端に
なるようにサーマルプリンタ(図示せず)に挿入し、通
常のオーバーライトと同様の操作で行われるが、唯一の
相違は、サーマルヘッドがまず予熱領域の表面に接触し
た時点で各加熱素子に予熱のためのエネルギーが供給さ
れ、ついで印字領域に達した後に通常の印字および消去
によるオーバーライトが行われる、ということである。
In the actual overwriting operation, the reversible thermosensitive recording medium shown in FIGS. 1 and 2 is inserted into a thermal printer (not shown) so that the preheating area is at the front end, and the overwriting operation is performed in the same manner as in ordinary overwriting. The only difference is that when the thermal head first contacts the surface of the preheating area, the heating elements are supplied with energy for preheating, and then the normal printing and erasing operations are performed after reaching the printing area. Overwriting is performed.

【0020】サーマルヘッドに対する可逆性感熱記録媒
体の走行速度は、一般的なサーマルプリンタでは27m
m/sec程度であるので、可逆性感熱記録媒体の走行
方向に関して予熱領域が2.7mmの長さで形成されて
いるとすれば、この予熱領域を通過するのに約0.1秒
を要することになる。予熱時間は長い方が望ましいが、
本発明者の実験によれば、サーマルヘッドの各加熱素子
の予熱時間は0.1秒程度で十分であるが、好ましくは
0.2秒もしくはそれ以上であることが確認された。す
なわち予熱領域の好ましい長さは、一般的なサーマルプ
リンタを基準にすれば、約3mm以上、より好ましくは
約6mm以上である。この予熱されたサーマルヘッドに
より、印字領域ではその始点から満足すべき条件でオー
バーライトが行われることになる。またサーマルヘッド
が予熱領域の表面に接触しているため、熱が可逆性感熱
記録媒体に拡散し、したがってサーマルヘッドが過剰に
加熱されて加熱素子が断線するおそれもない。
The traveling speed of the reversible thermosensitive recording medium with respect to the thermal head is 27 m in a general thermal printer.
m / sec, it takes about 0.1 second to pass through the preheating area if the preheating area has a length of 2.7 mm in the running direction of the reversible thermosensitive recording medium. Will be. Longer preheating time is desirable,
According to an experiment performed by the present inventors, it was confirmed that a preheating time of about 0.1 second is sufficient for each heating element of the thermal head, but preferably 0.2 second or more. That is, the preferable length of the preheating region is about 3 mm or more, more preferably about 6 mm or more, based on a general thermal printer. With the preheated thermal head, overwriting is performed in the print area under satisfactory conditions from the start point. Further, since the thermal head is in contact with the surface of the preheating area, heat is diffused to the reversible thermosensitive recording medium, and therefore there is no possibility that the thermal head is excessively heated and the heating element is disconnected.

【0021】なお可逆性感熱記録媒体が挿入される前に
サーマルヘッドを予熱しても同様の効果が得られるが、
可逆性感熱記録媒体に接触していない状態でサーマルヘ
ッドにエネルギーを供給するとオーバーヒートの状態に
なり、サーマルヘッドの寿命が極端に短縮されるので実
用にならない。
A similar effect can be obtained by preheating the thermal head before the reversible thermosensitive recording medium is inserted.
If energy is supplied to the thermal head in a state where the thermal head is not in contact with the reversible thermosensitive recording medium, the thermal head will be overheated, and the life of the thermal head will be extremely shortened, which is not practical.

【0022】また図1および図2の構成の可逆性感熱記
録媒体において、予熱領域の表面を構成する印刷保護層
に、シリカのような充填剤を添加しておくことにより、
これに接触したサーマルヘッドをクリーニングする効果
も得られる。
In the reversible thermosensitive recording medium having the structure shown in FIGS. 1 and 2, by adding a filler such as silica to the print protection layer constituting the surface of the preheating area,
An effect of cleaning the thermal head in contact with this can also be obtained.

【0023】[0023]

【実施例】以下に本発明の実施例を、本発明の範囲外の
比較例とともに示す。なお実施例および比較例におい
て、「部」はすべて重量部を表す。
EXAMPLES Examples of the present invention will be described below together with comparative examples outside the scope of the present invention. In Examples and Comparative Examples, all “parts” represent parts by weight.

【0024】(実施例1〜4および比較例1〜2)以下
の操作により、図1および図2に示した構成の可逆性感
熱記録媒体を作成した。
Examples 1-4 and Comparative Examples 1-2 A reversible thermosensitive recording medium having the structure shown in FIGS. 1 and 2 was prepared by the following operations.

【0025】まず、厚さ約188μmのポリエチレンテ
レフタレートのシートからなる基材1の表面に、金属蒸
着層2を設け、その上に、下記の組成の可逆性感熱記録
塗料を約5μmの厚さに塗工し、130℃で1分乾燥し
て可逆性感熱記録層3を形成した。
First, a metal deposition layer 2 is provided on the surface of a base material 1 made of a polyethylene terephthalate sheet having a thickness of about 188 μm, and a reversible thermosensitive recording paint having the following composition is coated thereon to a thickness of about 5 μm. It was coated and dried at 130 ° C. for 1 minute to form a reversible thermosensitive recording layer 3.

【0026】 ドデカン二酸 5部 1,18−オクタデカメチレンジカルボン酸ジステアリル 25部 樹脂A 110部 固形分27%メチルエチルケトン/トルエン溶液 ポリビニルアルコールのポリマー組成重量比6% アクリル酸の官能基数3 光重合開始剤 1部 (チバガイギー(株)製、商品名「イルガキュア2959」) テトラヒドロフラン 600部 つぎに、160W/cm×1灯の紫外線ランプを用いて
30m/minで紫外線を照射して樹脂母材を硬化さ
せ、乾燥膜厚5μmの記録層を形成した。
Dodecane diacid 5 parts 1,18-octadecamethylene dicarboxylic acid distearyl 25 parts Resin A 110 parts Solid content 27% methyl ethyl ketone / toluene solution Polyvinyl alcohol polymer composition weight ratio 6% Acrylic acid functional group number 3 Photopolymerization Initiator 1 part (trade name "Irgacure 2959", manufactured by Ciba Geigy Co., Ltd.) 600 parts tetrahydrofuran Next, ultraviolet rays are irradiated at 30 m / min using a 160 W / cm × 1 ultraviolet lamp to cure the resin base material. Then, a recording layer having a dry film thickness of 5 μm was formed.

【0027】ここに形成された記録層上に、下記の組成
の塗料をバーコーティングにより塗布した。
On the recording layer thus formed, a paint having the following composition was applied by bar coating.

【0028】 紫外線硬化型塗料 50部 (大日本インキ化学工業(株)製、商品名「ユニディック17−806」) 光重合開始剤 1部 (チバガイギー(株)製、商品名「イルガキュア184」) シリコーンオイル (信越化学工業(株)製、商品名「KF96」) 1部 酢酸ブチル 50部 この塗料を、80℃のオーブン中で1分間乾燥させた
後、160W/cm×3灯の紫外線ランプで30m/m
inで紫外線を照射して硬化させ、乾燥膜厚2μmの保
護層4を形成した。
UV curable paint 50 parts (Dainippon Ink & Chemicals, Inc., trade name "Unidick 17-806") Photopolymerization initiator 1 part (Ciba Geigy Co., Ltd., trade name "Irgacure 184") Silicone oil (Shin-Etsu Chemical Co., Ltd., trade name "KF96") 1 part Butyl acetate 50 parts After drying this paint in an oven at 80 ° C. for 1 minute, use a 160 W / cm × 3 UV lamp. 30m / m
In curing was performed by irradiating with ultraviolet rays to form a protective layer 4 having a dry film thickness of 2 μm.

【0029】つぎに、保護層4上にオフセット印刷で予
熱領域を覆う印刷層5を設け、さらにその上に印刷保護
層6を設けた。
Next, a printing layer 5 for covering the preheating area by offset printing was provided on the protection layer 4, and a printing protection layer 6 was further provided thereon.

【0030】同様の操作で得られた多数のサンプルにつ
いて、市販のサーマルプリンタを用いて、予熱領域の長
さ、種々の環境温度、印字エネルギー、および消去エネ
ルギーを変化させてオーバーライト印字を行った。
A number of samples obtained by the same operation were subjected to overwrite printing using a commercially available thermal printer while changing the length of the preheating area, various environmental temperatures, printing energy, and erasing energy. .

【0031】使用したサーマルプリンタにおけるオーバ
ーライト条件を下に示す。なお予熱領域でサーマルヘッ
ドに印加したエネルギーは、印字エネルギーと同じ大き
さである。
The overwriting conditions in the used thermal printer are shown below. The energy applied to the thermal head in the preheating area has the same magnitude as the printing energy.

【0032】サーマルヘッド:8dots/mm,1300Ω 印加電圧: 24V 印字速度:27mm/sec パルス同期:4.12msec/line 得られた印字の印字濃度図1の点およびで、また消
去濃度を点およびの位置で測定し、その結果をまと
めて下記の表1に示す。合わせてまた比較のために、予
熱を行わなかったものについての結果も併せて示す。
Thermal head: 8 dots / mm, 1300 Ω Applied voltage: 24 V Printing speed: 27 mm / sec Pulse synchronization: 4.12 msec / line Print density of the obtained print The dots in FIG. The measurement was performed at each position, and the results are shown in Table 1 below. In addition, for comparison, the results for those without preheating are also shown.

【0033】[0033]

【表1】 ◎:非常に良好 ○:良好 ×:不良 表1から明らかなように、本発明の方法にしたがって、
印字領域の前に適度な予熱を行った実施例1〜4では、
印字開始点に最も近い点と、印字終了点に近い点と
の間で印字濃度にほとんど差が認められず、また消去濃
度についても、消去開始点に最も近い点および印字終
了点に近い点において同等の消去結果が示されてい
る。またこの結果は、環境温度の変化にも影響されな
い。
[Table 1] :: very good :: good ×: poor As apparent from Table 1, according to the method of the present invention,
In Examples 1 to 4 in which appropriate preheating was performed before the printing area,
There is almost no difference in print density between the point closest to the print start point and the point close to the print end point, and the erase density is also the point closest to the erase start point and the point close to the print end point. Equivalent erasure results are shown. This result is not affected by changes in the environmental temperature.

【0034】これに対して予熱を行わなかった比較例1
では、エネルギー不足のために、印字および消去開始直
後の位置でそれぞれ印字、消去不良となっている。また
印字エネルギーを高く設定した比較例2では、印字は良
好であったが、オーバーライト後半でエネルギー過多と
なり、消去不良となった。
Comparative Example 1 in which no preheating was performed
In this case, due to energy shortage, printing and erasing failures occurred immediately after the start of printing and erasing, respectively. In Comparative Example 2 in which the printing energy was set high, the printing was good, but the energy was excessive in the latter half of overwriting, resulting in erasure failure.

【0035】[0035]

【発明の効果】以上に説明したように、本発明によれ
ば、可逆性感熱記録媒体に、その走行方向に関して前方
の位置に予熱領域を、その後方に印字領域を設け、印字
領域に到達する前にサーマルヘッドを予熱領域に接触さ
せた状態でこれにエネルギーを供給して予熱しておくこ
とにより、オーバーライト印字に際して、その始点から
明瞭な印字/消去を行うことが可能である。
As described above, according to the present invention, the reversible thermosensitive recording medium is provided with a preheating area at a position forward in the traveling direction and a printing area behind the preheating area, and reaches the printing area. When the thermal head is brought into contact with the preheating area in advance and supplied with energy to preheat it, clear printing / erasing can be performed from the starting point in overwriting printing.

【0036】またサーマルヘッドの予熱の開始は、可逆
性感熱記録媒体の挿入から一定時間後に所定の時間だけ
行えばよいので、通常のサーマルプリンタの制御シーケ
ンスをわずかに変更するだけでよく、きわめて高い実用
性を有する。
The preheating of the thermal head only needs to be performed for a predetermined time after a predetermined time from the insertion of the reversible thermosensitive recording medium. Therefore, it is only necessary to slightly change the control sequence of a normal thermal printer, which is extremely high. Has practicality.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のオーバーライト印字方法に適用される
可逆性感熱記録媒体の平面図。
FIG. 1 is a plan view of a reversible thermosensitive recording medium applied to an overwrite printing method of the present invention.

【図2】図1のA−A’線に沿った断面図。FIG. 2 is a sectional view taken along the line A-A 'of FIG.

【図3】本発明が対象とする可逆性感熱記録媒の加熱温
度に対する反射濃度の推移を示すグラフ。
FIG. 3 is a graph showing a change in reflection density with respect to a heating temperature of a reversible thermosensitive recording medium to which the present invention is applied.

【符号の説明】[Explanation of symbols]

1 基材 2 反射層 3 可逆性感熱記録層 4 保護層 5 印刷層 6 印刷保護層 DESCRIPTION OF SYMBOLS 1 Substrate 2 Reflective layer 3 Reversible thermosensitive recording layer 4 Protective layer 5 Print layer 6 Print protective layer

───────────────────────────────────────────────────── フロントページの続き (72)発明者 森中 宏幸 東京都文京区小石川四丁目14番12号 共同 印刷株式会社内 (72)発明者 藤田 実 東京都文京区小石川四丁目14番12号 共同 印刷株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Morinaka 4- 14-12 Koishikawa, Bunkyo-ku, Tokyo Joint printing company (72) Inventor Minoru Fujita 4- 14-12 Koishikawa, Bunkyo-ku, Tokyo Joint Printing Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 基材の一方の面に可逆性感熱記録層を有
する可逆性感熱記録媒体に対してサーマルヘッドを相対
的に移動させることによりオーバーライト印字を行う方
法であって、 可逆性感熱記録媒体として、可逆性感熱記録のための記
録領域と、この記録が行われる際の走行方向に関して前
方に位置する予熱領域とを設けた可逆性感熱記録媒体を
使用し、 前記サーマルヘッドの位置に前記予熱領域が到達した段
階で前記サーマルヘッドに予熱エネルギーの供給を開始
し、 前記サーマルヘッドの位置に前記記録領域が到達したと
きに前記サーマルヘッドに所定の記録を行うための記録
エネルギーを供給すること、を特徴とする可逆性感熱記
録媒体のオーバーライト印字方法。
1. A method for performing overwriting printing by moving a thermal head relative to a reversible thermosensitive recording medium having a reversible thermosensitive recording layer on one surface of a substrate, comprising: As a recording medium, a recording area for reversible thermosensitive recording, and a reversible thermosensitive recording medium provided with a preheating area positioned forward with respect to a traveling direction when the recording is performed, using a reversible thermosensitive recording medium, at the position of the thermal head At the stage when the preheating area has reached, the supply of preheating energy to the thermal head is started, and when the recording area reaches the position of the thermal head, the recording energy for performing predetermined recording to the thermal head is supplied. Overwrite printing method for a reversible thermosensitive recording medium.
JP22513596A 1996-08-27 1996-08-27 Overwrite printing method for reversible thermosensitive recording medium Expired - Fee Related JP3877239B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22513596A JP3877239B2 (en) 1996-08-27 1996-08-27 Overwrite printing method for reversible thermosensitive recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22513596A JP3877239B2 (en) 1996-08-27 1996-08-27 Overwrite printing method for reversible thermosensitive recording medium

Publications (2)

Publication Number Publication Date
JPH1058840A true JPH1058840A (en) 1998-03-03
JP3877239B2 JP3877239B2 (en) 2007-02-07

Family

ID=16824516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22513596A Expired - Fee Related JP3877239B2 (en) 1996-08-27 1996-08-27 Overwrite printing method for reversible thermosensitive recording medium

Country Status (1)

Country Link
JP (1) JP3877239B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009056672A (en) * 2007-08-31 2009-03-19 Takamisawa Cybernetics Co Ltd Card processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009056672A (en) * 2007-08-31 2009-03-19 Takamisawa Cybernetics Co Ltd Card processing apparatus

Also Published As

Publication number Publication date
JP3877239B2 (en) 2007-02-07

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