JP4210416B2

JP4210416B2 - Light-shielding photosensitive material roll

Info

Publication number: JP4210416B2
Application number: JP2000200779A
Authority: JP
Inventors: 将文福川; 陽宏門田
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2000-07-03
Filing date: 2000-07-03
Publication date: 2009-01-21
Anticipated expiration: 2020-07-03
Also published as: JP2002023312A

Description

【０００１】
【発明の属する技術分野】
本発明は、長尺状感光材料シートを巻芯の周囲に巻き付けてなる感光材料ロールの明室装填用の包装体に関する。
【０００２】
【従来の技術】
長尺な印画紙などの感光材料シートを巻芯の周りに巻き付けてなる感光材料ロールの巻芯の両端部に円盤状遮光部材（遮光フランジともいう）を取り付け、そして、その外周に遮光リーダを巻き付けた感光材料ロールの包装体（以下、遮光性感光材料ロールという）であって、遮光リーダを円盤状遮光部材の外側表面まで覆うように巻き付けた遮光性感光材料ロールは、遮光リーダと円盤状遮光部材との間に光が入り込む隙間ができにくいので、感光材料シートが保管、輸送中に感光しにくいことから、工業的に容易に製造することができるこの種の遮光性感光材料ロールが種々提案されている。
【０００３】
特開平８−４０４６８号公報では、感光材料ロールに遮光リーダを二周以上巻き付け、内側（一周目）に巻かれた遮光リーダの両側端部を感光材料ロールの側面と円盤状遮光部材との間に挿入させ、外側（二周目）に巻かれた遮光リーダの両側端部を円盤状遮光部材の外側面に接触した構造（この公報ではこのような構造をラビリンス構造と呼んでいる）の遮光性感光材料ロールが提案されている。このような構造の遮光性感光材料ロールは、幅が感光材料シートの幅よりも拡幅されている第一拡幅部（第一セグメント）、幅が感光材料シートの幅と略同一の拡幅部連結部（第二セグメント）、幅が感光材料シートの幅よりも拡幅されている第二拡幅部（第三セグメント）がこの順で設けられている遮光リーダを、引き伸ばしながら感光材料ロールに巻き付けて第一拡幅部の両側端部を感光材料ロールの側面に密着させ、次いで、感光材料ロールに円盤状遮光部材を取り付け、拡幅部連結部を感光材料ロールに巻き付けた後、第二拡幅部の両側端部を円盤遮光部材の側面に密着させることにより製造することができる。
【０００４】
上記公報に記載の遮光性感光材料ロールは、特に明室で感光材料ロールを写真処理装置などの関連装置に装填する際において、優れた遮光性能を発揮する。しかしながら、遮光リーダを引き伸ばしながら感光材料ロールの周囲に巻き付けるときに、遮光リーダが切れることがあったり、感光材料ロールの周端縁に損傷を与えることがあるという問題がある。また、特に遮光リーダの幅が広くなると、遮光リーダを均一に引き伸ばすことが難しくなるという問題がある。
【０００５】
【発明が解決しようとする課題】
本発明の目的は、感光材料ロールに遮光リーダを二周以上巻き付けてなり、内側に巻かれた遮光リーダの両側端部が感光材料ロールの側面と円盤状遮光部材との間に挿入され、外側に巻かれた遮光リーダの両側端部が円盤状遮光部材の外側面に接触している構造の遮光性感光材料ロールであって、遮光リーダを引き伸ばずに工業的に容易な手法で製造することができる遮光性感光材料ロールを提供することにある。
【０００６】
【課題を解決するための手段】
本発明は、長尺状感光材料シートを巻芯の周囲に巻き付けてなる感光材料ロール、該感光材料ロールの巻芯の両端部のそれぞれに取り付けられた、感光材料ロールの半径と略同一の半径を有する円盤状遮光部材、該感光材料ロールの長尺状感光材料シートの先端部に接合されている、長さが該円盤状遮光部材の円周の二倍よりも長く、基本幅が該長尺状感光材料シートの幅と略同一であって、幅方向に突き出すように両側端部に沿って拡幅された、それぞれが該円盤状遮光部材の円周よりも長い長さを持つ二つもしくはそれ以上の拡幅部が設けられている熱収縮性遮光リーダからなり、該熱収縮性遮光リーダの拡幅部のうちの感光材料シートに近い側の一つが感光材料ロールの側面と円盤状遮光部材との間に挿入され、感光材料シートとは遠い側の拡幅部が円盤状遮光部材の外周縁部を超えて外側表面に熱収縮した状態で接触していることを特徴とする遮光性感光材料ロールにある。
【０００７】
また、本発明は、長尺状感光材料シートを巻芯の周囲に巻き付けてなる感光材料ロール、該感光材料ロールの巻芯の両端部のそれぞれに取り付けられた、感光材料ロールの半径と略同一の半径を有する円盤状遮光部材、該感光材料ロールの長尺状感光材料シートの先端部に接合されている、長さが該円盤状遮光部材の円周の二倍よりも長く、幅が該長尺状感光材料シートの幅と略同一の遮光シートの両側部のそれぞれに、幅方向に突き出すように両側端部に沿って、それぞれが該円盤状遮光部材の円周よりも長い長さを持つ二つもしくはそれ以上の熱収縮性遮光片が付設されてなる遮光リーダからなり、該熱収縮性遮光片のうちの感光材料シートに近い側の一つが感光材料ロールの側面と円盤状遮光部材との間に挿入され、感光材料シートとは遠い側の熱収縮性遮光片が円盤状遮光部材の外周縁部を超えて外側表面に熱収縮した状態で接触していることを特徴とする遮光性感光材料ロールにもある。
【０００８】
本発明の遮光性感光材料ロールにおいて、感光材料シートに遠い側の熱収縮性遮光リーダの拡幅部あるいは熱収縮性遮光片は、主として長さ方向に熱収縮した状態で円盤状遮光部材の外周縁部を超えて外側表面に接触していることが好ましい。さらに、その円盤状遮光部材の外側表面に接触している拡幅部あるいは熱収縮性遮光片は、円盤状遮光部材の外側表面に熱融着されていても良い。また、本発明の遮光性感光材料ロールにおいては、熱収縮性遮光リーダの拡幅部あるいは熱収縮性遮光片のうちの感光材料シートに近い側の一つも、主として長さ方向に熱収縮した状態で感光材料ロールの側面と円盤遮光部材との間に挿入されていることが好ましい。
【０００９】
【発明の実施の形態】
本発明の遮光性感光材料ロールの一実施例について、添付図面の図１〜６を参照しながら説明する。添付図面の図１は、本発明に従い、幅方向に突き出すように両側端部に沿って拡幅された二つの拡幅部が設けられている熱収縮性遮光リーダを用いた遮光性感光材料ロールの一例の斜視図である。
【００１０】
本発明の遮光性感光材料ロールでは、感光材料ロールが円盤状遮光部材４と熱収縮性遮光リーダ５とにより遮光されている。熱収縮性遮光リーダ５は感光材料ロールに二周以上巻かれていて、その巻き終わりの末端部は粘着テープ６により巻き止めされている。
【００１１】
図２は、図１に示されている遮光性感光材料ロールの一例の分解斜視図である。遮光性感光材料ロールは、長尺状感光材料シート２を巻芯３の周りに巻き付けてなる感光材料ロール１、円盤状遮光部材４、二つの拡幅部５ｂ、５ｄが設けられている熱収縮性遮光リーダ５から構成されている。図２では、円盤状遮光部材４はリング状遮光シート４ａとフランジ部を備えた中空筒部材４ｂとからなり、リング状遮光シート４ａの円孔部に中空筒部材４ｂの筒部を貫通させて巻芯３の内壁に挿入して固定する構成の例が示されている。円盤状遮光部材４は、必ずしもリング状遮光シートと中空筒部材とから形成する必要はない。例えば、フランジ部と中空筒部材とが一体的になったフランジ付き中空筒部材を用いても良い。
【００１２】
図３は図２に示されている熱収縮性遮光リーダの正面図である。熱収縮性遮光リーダ５は、幅が基本幅、すなわち長尺状感光材料シートの幅と略同一である前端部５ａ、拡幅部連結部５ｃ、末端部５ｅと、幅が基本幅よりも広い第一拡幅部５ｂ、第二拡幅部５ｄとからなる。図３においては、前端部５ａ、拡幅部連結部５ｃ、末端部５ｅと、第一拡幅部５ｂ、第二拡幅部５ｄとの間にはテーパ部が設けられているが、テーパ部を設けなくても良い。第一拡幅部５ｂの長さＬ₁及び第二拡幅部５ｄの長さＬ₃は、感光材料ロールの円周の長さ以上であれば、それぞれ同一であっても異なっていても良い。拡幅連結部５ｂの長さＬ₂には、特に制限はない。第一拡幅部の幅Ｗ₁及び第二拡幅部の幅Ｗ₂は基本幅Ｗ₀より５〜２０ｍｍの範囲内で拡幅されていることが好ましいが、これに限定されるものではない。
【００１３】
図４は、図１に示されている遮光性感光材料ロールの部分断面図である。図４に示すように本発明の遮光性感光材料ロールでは、熱収縮性遮光リーダ５の感光材料シート２に近い側（内側）に巻き付けられた第一拡幅部５ｂが、その熱収縮により感光材料ロール１の側面と円盤状遮光部材４との間に挿入されている。そして、その外周には拡幅部連結部５ｃを挟んで、第二拡幅部５ｄが巻き付けられており、その第二拡幅部の両側端部は、その熱収縮により円盤状遮光部材４の外側表面に接触している。図４ではリング状遮光シート４ａは可撓性であり、熱収縮性遮光リーダの第一拡幅部の厚みによりわずかに折れ曲がっているが、リング状遮光シートは硬質性であっても良い。
【００１４】
図２及び３に示されている熱収縮性遮光リーダは、拡幅部連結部が第一拡幅部と第二拡幅部との間を切り抜いたような形で形成されているが、第一拡幅部と第二拡幅部との間に切り込みを入れた形で拡幅部連結部を形成することもできる。
【００１５】
図５は、本発明の遮光性感光材料ロールに用いることができる熱収縮性遮光リーダの別の一例を示す正面図である。図５には、拡幅部連結部が第一拡幅部５ｂと第二拡幅部５ｄと間に切り込み部７を形成された熱収縮性遮光リーダの例が示されている。切り込み部７の先端には、切り込みにより熱収縮性遮光リーダが切れたりしないように先端に切り抜き部８が設けられていることが好ましい。切り込み部の個数は、図５（ａ）に示すように複数個であっても、図５（ｂ）に示すように１個であっても良い。また、切り抜き部の形状は、図５（ａ）に示すように円形状もしくは図５（ｂ）に示すように楕円状であっても良い。
【００１６】
本発明の遮光性感光材料ロールに用いられる熱収縮性遮光リーダは遮光性を有し、主として長さ方向に熱収縮性を有するものであることが好ましい。熱収縮性遮光リーダの熱収縮率は、５０℃において、長さ方向で１％未満、幅方向で１％未満であり、かつ１００℃において、長さ方向で５〜３０％、幅方向で３０％未満であり、長さ方向の収縮率が、幅方向の収縮率よりも（絶対的な差として１％以上好ましくは３％さらに好ましくは５％以上）大きいものであることが好ましい。なお、ここでの熱収縮性遮光リーダの熱収縮率は、ＪＩＳＺ１７０９−１９７６（収縮包装用フィルム）に規定されている方法により測定した値である。
【００１７】
熱収縮性遮光リーダの材料の例としては、長さ方向に大きな熱収縮性を有し、かつ長さ方向に引裂き可能な透明あるいは半透明のシュリンクフィルムと、熱収縮性をほとんどあるいは全く示さない遮光性フィルムとを貼り合わせた積層熱収縮性遮光フィルムを挙げることができるが、これに限定されるものではない。この積層熱収縮性遮光フィルムに使用できるシュリンクフィルムとしては、例えば、ファンシーラップ（商品名、グンゼ（株）製）のグレードがＴＨＳ、ＴＮＳ、ＴＡＳ、ＴＢＳ、ＴＲＳであるものを挙げることができる。また、積層熱収縮性遮光フィルムに使用できる遮光性フィルムとしては、例えば、カーボンブラックなどの顔料を混入させた低密度ポリエチレンフィルムなどのフィルムを挙げることができる。
【００１８】
図６は、図１に示されている感光材料ロールの製造工程の一例を表した図である。図６に示すように、遮光性感光材料ロールは以下に述べる四つの工程により製造することができる。
（１）感光材料ロール１の巻芯の両端部に、中空筒部材４ｂの筒部をリング状遮光シート４ａの円孔部を貫通させ、中空筒部材を感光材料ロールの巻芯の内壁に挿入し固定し、感光材料シート２の先端に熱収縮性遮光リーダ５を接合する工程（第一工程）。
（２）側面遮光板４のリング状遮光シート４ａの一部をその外側方向に折り曲げた状態で、熱収縮性遮光リーダ５を感光材料ロールに巻き付けながら、感光材料ロール１の端部に接触している第一拡幅部５ｂの表面に熱風を吹き付けて、その熱収縮により第一拡幅部５ｂを感光材料ロールの側面に接触させる工程（第二工程）。
（３）円盤状側面遮光板４の可撓性リング状遮光シート４ａを折り曲げずに元の状態に戻し、熱収縮性遮光リーダ５を感光材料ロールに巻き付けながら、リング状遮光シートの外周縁部に接触している第二拡幅部５ｄの表面に熱風を吹き付けて、その熱収縮により第二拡幅部５ｄを円盤状側面遮光部材の外側表面に接触させる工程（第三工程）。
（４）熱収縮性遮光リーダ５を粘着テープ６により封止する工程（第四工程）。
【００１９】
図６に示すように本発明の遮光性感光材料ロールでは、遮光リーダが熱収縮性を有することから拡幅部の熱収縮により、遮光リーダを引き伸ばさなくても、第一拡幅部を感光材料ロールの側面と円盤状遮光部材との間に挿入し、第二拡幅部を円盤状遮光部材の外周縁部を超えて外側表面に接触させることができる。従って、本発明の遮光性感光材料ロールでは、その製造中に遮光リーダが切れたり、感光材料ロールの周端縁に損傷を与えたりすることが少なくなる。なお、図６に示した例では、第一工程において、感光材料ロールの巻芯に円盤状遮光部材が取り付けているが、第一拡幅部を熱収縮により感光材料ロールの側面側に接触させた後、円盤状遮光部材を取り付けても良い。
【００２０】
図１〜６では、幅方向に突き出すように両側端部に沿って拡幅された二つの拡幅部が設けられている熱収縮性遮光リーダを用いた遮光性感光材料ロールについて説明したが、本発明の遮光性感光材料ロールにおいては、遮光リーダの全体が熱収縮性を示す必要はなく、第一拡幅部及び第二拡幅部のみが熱収縮性を有していれば良い。例えば、熱収縮性を特には示さない遮光シートに熱収縮性遮光片を付設して拡幅部を形成した遮光リーダを用いることもできる。このような遮光リーダを用いた場合の遮光性感光材料ロールの例を図７〜９を用いて説明する。
【００２１】
図７は、本発明に従い、遮光シートの両側部のそれぞれに、幅方向に突き出すように両側端部に沿って、二つの熱収縮性遮光片を付設してなる熱収縮性遮光リーダを用いた遮光性感光材料ロールの一例の斜視図である。図７に示されている遮光性感光材料ロールは、図１に示した遮光性感光材料ロールと同様に、遮光リーダが感光材料ロールに二周以上巻かれていて、その巻き終わりの末端部は粘着テープ６により巻き止めされている。
【００２２】
図８は図７に示されている遮光性感光材料ロールの一例の分解斜視図である。熱収縮性遮光リーダ５は幅が感光材料ロールの幅と略同一の幅の遮光性シート９と、相対的に長さ方向に大きな熱収縮性を示す熱収縮性遮光片１０ａ、１０ｂとからなる。熱収縮性遮光片は、そろぞれ遮光性シートの幅方向に突き出すように両側端部に沿って付設されており、それぞれが円盤状遮光部材の円周よりも長い長さを持つ。熱収縮性遮光片の遮光シートから突き出している部分の幅は、前記の部分的に拡幅された熱収縮性遮光リーダの場合と同様に５〜２０ｍｍの範囲内であることが好ましい。遮光シート９は、熱収縮性をほとんどあるいは全く有していないものであることが好ましく、カーボンブラックなどの顔料を混入したプラスチックフィルムを使用することができる。熱収縮性遮光片１０ａ、１０ｂは前記の熱収縮性遮光リーダと同様の材料のものを用いることができる。
【００２３】
図９は図７に示されている遮光性感光材料ロールの一例の部分断面図である。ここに示した本発明の遮光性感光材料ロールでは、熱収縮性遮光リーダ５の遮光シート９に付設された熱収縮性遮光片のうち、感光材料シート側に近い側に付設された熱収縮性遮光片１０ａが熱収縮した状態で感光材料ロール１の側面と円盤状遮光部材４（リング状遮光シート４ａ）との間に挿入されていて、感光材料シートに遠い側に付設された熱収縮性遮光片１０ｂは、その熱収縮した状態で円盤状遮光部材４の外側表面に接触している。
【００２４】
【発明の効果】
本発明の遮光性感光材料ロールは、遮光リーダの熱収縮により、内側に巻き付けた遮光リーダ両端部を感光材料ロールの側面と円盤状遮光部材との間に挿入させ、外側に巻き付けた遮光リーダ両端部を円盤状遮光部材の外側表面に接触させているので、遮光リーダを引き伸ばしながら感光材料ロールに巻き付ける必要がない。従って、本発明の遮光性感光材料ロールでは、その製造中に遮光リーダが切れたりするようなことが起こりにくい。また、本発明の遮光性感光材料ロールは、内側に巻かれた遮光リーダの両側端部が感光材料ロールの側面と円盤状遮光部材との間に挿入され、外側に巻かれた遮光リーダの両端端部が円盤状遮光部材の外側縁部を超えて外側表面に接触しているので、長期間にわたって感光材料シートを露光させることなく保存することができる。
【図面の簡単な説明】
【図１】本発明に従い、幅方向に突き出すように両側端部に沿って拡幅された二つの拡幅部が設けられている熱収縮性遮光リーダを用いた遮光性感光材料ロールの一例の斜視図である。
【図２】図１に示した遮光性感光材料ロールの一例の分解斜視図である。
【図３】図２に示した熱収縮性遮光リーダの一例の正面図である。
【図４】図１に示した遮光性感光材料ロールの一例の部分断面図である。
【図５】本発明の遮光性感光材料ロールに用いることができる熱収縮性遮光リーダの別の例を示す正面図である。
【図６】図１に示した遮光性感光材料ロールの一例の製造工程図である。
【図７】本発明に従い、遮光シートの両側部のそれぞれに、幅方向に突き出すように両側端部に沿って、二つの熱収縮性遮光片を付設してなる遮光リーダを用いた遮光性感光材料ロールの一例の斜視図である。
【図８】図７に示した遮光性感光材料ロールの一例の分解斜視図である。
【図９】図７に示した遮光性感光材料ロールの一例の部分断面図である。
【符号の説明】
１感光材料ロール
２長尺状感光材料シート
３巻芯
４円盤状遮光部材
４ａリング状遮光シート
４ｂ中空筒部材
５熱収縮性遮光リーダ
５ａ前端部
５ｂ第一拡幅部
５ｃ拡幅部連結部
５ｄ第二拡幅部
５ｅ末端部
６粘着テープ
７切り込み
８切り抜き部
９遮光シート
１０熱収縮性遮光片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a package for loading a photosensitive material roll into a bright room, in which a long photosensitive material sheet is wound around a core.
[0002]
[Prior art]
Disc-shaped light-shielding members (also called light-shielding flanges) are attached to both ends of the core of a photosensitive material roll formed by winding a sheet of photosensitive material such as a long photographic paper around the core, and a light-shielding reader is attached to the outer circumference of the core. A wrapped photosensitive material roll package (hereinafter referred to as a light-shielding photosensitive material roll), which is a light-sensitive photosensitive material roll wound so as to cover the light-shielding reader to the outer surface of the disk-shaped light-shielding member. There are various types of light-sensitive photosensitive material rolls of this kind that can be easily manufactured industrially because it is difficult to create a gap for light to enter between the light-shielding member and the photosensitive material sheet is difficult to be exposed to light during storage and transportation. Proposed.
[0003]
In JP-A-8-40468, a light-shielding reader is wound around a photosensitive material roll two or more times, and both end portions of the light-shielding reader wound on the inner side (first round) are arranged between the side surface of the photosensitive material roll and the disk-shaped light-shielding member. A light shielding structure in which both end portions of the light shielding reader wound outside (second round) are in contact with the outer surface of the disk-shaped light shielding member (this structure is called a labyrinth structure in this publication) Photosensitive material rolls have been proposed. The light-shielding photosensitive material roll having such a structure has a first widened portion (first segment) whose width is wider than the width of the photosensitive material sheet, and a widened portion connecting portion whose width is substantially the same as the width of the photosensitive material sheet. (Second segment), a light-shielding reader provided with a second widened portion (third segment) whose width is wider than the width of the photosensitive material sheet in this order is wound around the photosensitive material roll while being stretched. The both side end portions of the widened portion are brought into close contact with the side surface of the photosensitive material roll, and then a disk-shaped light shielding member is attached to the photosensitive material roll, and the widened portion connecting portion is wound around the photosensitive material roll, and then both side end portions of the second widened portion Can be manufactured by closely contacting the side surface of the disk shading member.
[0004]
The light-shielding photosensitive material roll described in the above publication exhibits excellent light-shielding performance particularly when the photosensitive material roll is loaded into a related apparatus such as a photographic processing apparatus in a bright room. However, when the light-shielding reader is stretched and wound around the photosensitive material roll, there are problems that the light-shielding reader may break or damage the peripheral edge of the photosensitive material roll. In particular, when the width of the light-shielding reader is increased, it is difficult to uniformly extend the light-shielding reader.
[0005]
[Problems to be solved by the invention]
It is an object of the present invention to wind a light-shielding reader around a photosensitive material roll two or more times, and both end portions of the light-shielding reader wound inside are inserted between a side surface of the photosensitive material roll and a disk-shaped light-shielding member. A light-sensitive photosensitive material roll having a structure in which both end portions of a light-shielding reader wound on the outer surface of a disk-shaped light-shielding member are in contact with each other, and is manufactured by an industrially easy method without stretching the light-shielding reader An object of the present invention is to provide a light-shielding photosensitive material roll that can be used.
[0006]
[Means for Solving the Problems]
The present invention relates to a photosensitive material roll formed by winding a long photosensitive material sheet around a core, and a radius substantially the same as the radius of the photosensitive material roll attached to both ends of the core of the photosensitive material roll. A disc-shaped light-shielding member having a length longer than twice the circumference of the disc-shaped light-shielding member, which is bonded to the tip of the long photosensitive material sheet of the photosensitive material roll, and the basic width is the length Two or two, each having a length that is substantially the same as the width of the scale-shaped photosensitive material sheet and that is widened along both end portions so as to protrude in the width direction, each of which is longer than the circumference of the disk-shaped light shielding member It comprises a heat-shrinkable light-shielding reader provided with a further widened portion, and one of the widened portions of the heat-shrinkable light-shielding reader that is close to the photosensitive material sheet is a side surface of the photosensitive material roll, a disk-shaped light-shielding member, Inserted between the photosensitive material sheet and far from the photosensitive material sheet. In the light-blocking photosensitive material roll, characterized in that the widened portion of the side is in contact in a state of being heat-shrunk to the outer surface beyond the outer peripheral edge of the disk-shaped light shielding member.
[0007]
Further, the present invention provides a photosensitive material roll formed by winding a long photosensitive material sheet around a core, and substantially the same as the radius of the photosensitive material roll attached to both ends of the core of the photosensitive material roll. A disc-shaped light-shielding member having a radius of, a length of the disc-shaped light-shielding member bonded to the leading end of the long photosensitive material sheet of the photosensitive material roll is longer than twice the circumference of the disc-shaped light-shielding member, and the width is Each of the both sides of the light-shielding sheet substantially the same as the width of the long photosensitive material sheet has a length that is longer than the circumference of the disk-like light-shielding member along each side edge so as to protrude in the width direction. A light-shielding reader provided with two or more heat-shrinkable light-shielding pieces, and one of the heat-shrinkable light-shielding pieces closer to the photosensitive material sheet is a side surface of the photosensitive material roll and a disk-shaped light-shielding member Inserted between the photosensitive material sheet and There is also a light-shielding photosensitive material roll heat-shrinkable light-shielding strip on the far side is equal to or in contact in a state of being heat-shrunk to the outer surface beyond the outer peripheral edge of the disk-shaped light shielding member.
[0008]
In the light-shielding photosensitive material roll of the present invention, the widened portion of the heat-shrinkable light-shielding reader or the heat-shrinkable light-shielding piece on the side far from the photosensitive material sheet is the outer peripheral edge of the disk-shaped light-shielding member in a state of being heat-shrinked mainly in the length direction. It is preferable to contact the outer surface beyond the part. Further, the widened portion or the heat-shrinkable light-shielding piece in contact with the outer surface of the disk-shaped light shielding member may be heat-sealed to the outer surface of the disk-shaped light shielding member. Further, in the light-shielding photosensitive material roll of the present invention, one of the widened portion of the heat-shrinkable light-shielding reader or the heat-shrinkable light-shielding piece on the side close to the photosensitive material sheet is also in a state in which it is mainly heat-shrinked in the length direction. It is preferably inserted between the side surface of the photosensitive material roll and the disk light shielding member.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the light-shielding photosensitive material roll of the present invention will be described with reference to FIGS. FIG. 1 of the accompanying drawings shows an example of a light-shielding photosensitive material roll using a heat-shrinkable light-shielding reader provided with two widened portions that are widened along both side end portions so as to protrude in the width direction according to the present invention. FIG.
[0010]
In the light-sensitive photosensitive material roll of the present invention, the photosensitive material roll is shielded from light by the disk-shaped light-shielding member 4 and the heat-shrinkable light-shielding reader 5. The heat-shrinkable light-shielding reader 5 is wound around the photosensitive material roll two or more times, and the end portion of the winding end is stopped by the adhesive tape 6.
[0011]
FIG. 2 is an exploded perspective view of an example of the light-shielding photosensitive material roll shown in FIG. The light-shielding photosensitive material roll has a heat-shrinkable property in which a photosensitive material roll 1 formed by winding a long photosensitive material sheet 2 around a core 3, a disk-shaped light-shielding member 4, and two widened portions 5 b and 5 d are provided. The light blocking reader 5 is used. In FIG. 2, the disk-shaped light-shielding member 4 is composed of a ring-shaped light-shielding sheet 4a and a hollow cylindrical member 4b having a flange portion, and the cylindrical portion of the hollow cylindrical member 4b is passed through the circular hole portion of the ring-shaped light-shielding sheet 4a. The example of the structure inserted and fixed to the inner wall of the core 3 is shown. The disk-shaped light shielding member 4 is not necessarily formed from a ring-shaped light shielding sheet and a hollow cylindrical member. For example, a flanged hollow cylinder member in which a flange portion and a hollow cylinder member are integrated may be used.
[0012]
FIG. 3 is a front view of the heat-shrinkable light-shielding reader shown in FIG. The heat-shrinkable light-shielding reader 5 has a basic width, that is, a front end portion 5a, a widened portion connecting portion 5c, and a terminal end portion 5e, which are substantially the same as the width of the long photosensitive material sheet, and a width wider than the basic width. It consists of one widened portion 5b and a second widened portion 5d. In FIG. 3, a tapered portion is provided between the front end portion 5a, the widened portion connecting portion 5c, the end portion 5e, and the first widened portion 5b and the second widened portion 5d, but no tapered portion is provided. May be. The length L ₃ is the length L ₁ and the second widening portion 5d of the first wide section 5b, as long as more than the length of the circumference of the photosensitive material roll, may each be the same or different. The length L ₂ of the widening connecting portion 5b is not particularly limited. The width W ₂ of width W ₁ and the second widening portion of the first widening portion is preferably being widened within the 5~20mm than the base width W _0, but is not limited thereto.
[0013]
FIG. 4 is a partial cross-sectional view of the light-shielding photosensitive material roll shown in FIG. As shown in FIG. 4, in the light-shielding photosensitive material roll of the present invention, the first widened portion 5b wound on the side (inside) of the heat-shrinkable light-shielding reader 5 close to the photosensitive material sheet 2 It is inserted between the side surface of the roll 1 and the disk-shaped light shielding member 4. A second widened portion 5d is wound around the outer periphery of the widened portion connecting portion 5c, and both end portions of the second widened portion are formed on the outer surface of the disk-shaped light-shielding member 4 by the thermal contraction. In contact. In FIG. 4, the ring-shaped light-shielding sheet 4a is flexible and slightly bent depending on the thickness of the first widened portion of the heat-shrinkable light-shielding reader, but the ring-shaped light-shielding sheet may be rigid.
[0014]
The heat-shrinkable light-shielding reader shown in FIGS. 2 and 3 is formed such that the widened portion connecting portion is cut out between the first widened portion and the second widened portion. The widened portion connecting portion can also be formed in a form in which a cut is made between the second widened portion and the second widened portion.
[0015]
FIG. 5 is a front view showing another example of a heat-shrinkable light-shielding reader that can be used in the light-shielding photosensitive material roll of the present invention. FIG. 5 shows an example of a heat-shrinkable light-shielding reader in which the widened portion connecting portion has a cut portion 7 formed between the first widened portion 5b and the second widened portion 5d. It is preferable that a cutout portion 8 is provided at the tip of the cutout portion 7 so that the heat-shrinkable light-shielding reader is not cut by the cutout. The number of cut portions may be plural as shown in FIG. 5 (a), or may be one as shown in FIG. 5 (b). Further, the shape of the cutout portion may be circular as shown in FIG. 5 (a) or elliptical as shown in FIG. 5 (b).
[0016]
The heat-shrinkable light-shielding reader used in the light-shielding photosensitive material roll of the present invention preferably has a light-shielding property and mainly has heat-shrinkability in the length direction. The heat shrinkage of the heat-shrinkable light-shielding reader is less than 1% in the length direction and less than 1% in the width direction at 50 ° C. and 5 to 30% in the length direction at 100 ° C. and 30 in the width direction. It is preferable that the shrinkage rate in the length direction is larger than the shrinkage rate in the width direction (absolute difference is 1% or more, preferably 3%, more preferably 5% or more). Here, the heat shrinkage rate of the heat-shrinkable light-shielding reader is a value measured by a method prescribed in JIS Z 1709-1976 (film for shrink wrapping).
[0017]
Examples of materials for heat-shrinkable light-shielding readers include a transparent or translucent shrink film that has a large heat-shrinkability in the length direction and can be torn in the length direction, and exhibits little or no heat-shrinkability. A laminated heat-shrinkable light-shielding film bonded with a light-shielding film can be mentioned, but is not limited thereto. Examples of the shrink film that can be used for the laminated heat-shrinkable light-shielding film include those having a grade of THS, TNS, TAS, TBS, and TRS of Fancy Wrap (trade name, manufactured by Gunze Co., Ltd.). Examples of the light-shielding film that can be used for the laminated heat-shrinkable light-shielding film include films such as a low-density polyethylene film mixed with a pigment such as carbon black.
[0018]
FIG. 6 is a diagram showing an example of a manufacturing process of the photosensitive material roll shown in FIG. As shown in FIG. 6, the light-shielding photosensitive material roll can be produced by the following four steps.
(1) At both ends of the core of the photosensitive material roll 1, the cylindrical portion of the hollow cylindrical member 4b is passed through the circular hole portion of the ring-shaped light shielding sheet 4a, and the hollow cylindrical member is inserted into the inner wall of the core of the photosensitive material roll. And fixing the heat-shrinkable light-shielding reader 5 to the tip of the photosensitive material sheet 2 (first step).
(2) In a state where a part of the ring-shaped light shielding sheet 4a of the side light shielding plate 4 is bent outwardly, the heat shrinkable light shielding leader 5 is wound around the photosensitive material roll and is brought into contact with the end of the photosensitive material roll 1. A step of blowing hot air onto the surface of the first widened portion 5b, and bringing the first widened portion 5b into contact with the side surface of the photosensitive material roll by the thermal contraction (second step).
(3) The flexible ring-shaped light-shielding sheet 4a of the disk-shaped side light-shielding plate 4 is returned to its original state without being bent, and the outer periphery of the ring-shaped light-shielding sheet is wound around the heat-shrinkable light-shielding reader 5 around the photosensitive material roll. A step of blowing hot air on the surface of the second widened portion 5d that is in contact with the second widened portion 5d and bringing the second widened portion 5d into contact with the outer surface of the disk-shaped side surface light shielding member by the thermal contraction (third step).
(4) A step of sealing the heat-shrinkable light-shielding reader 5 with the adhesive tape 6 (fourth step).
[0019]
As shown in FIG. 6, in the light-shielding photosensitive material roll of the present invention, since the light-shielding reader has heat shrinkability, the first widened portion of the photosensitive material roll is not stretched due to thermal contraction of the widened portion. The second widened portion can be inserted between the side surface and the disk-shaped light-shielding member, and can be brought into contact with the outer surface beyond the outer peripheral edge of the disk-shaped light-shielding member. Therefore, in the light-shielding photosensitive material roll of the present invention, it is less likely that the light-shielding leader is cut during the production or the peripheral edge of the photosensitive material roll is damaged. In the example shown in FIG. 6, in the first step, the disk-shaped light shielding member is attached to the core of the photosensitive material roll, but the first widened portion is brought into contact with the side surface side of the photosensitive material roll by thermal contraction. Thereafter, a disk-shaped light shielding member may be attached.
[0020]
Although FIGS. 1-6 demonstrated the light-shielding photosensitive material roll using the heat-shrinkable light-shielding reader provided with two widened parts extended along the both-sides edge part so that it might protrude in the width direction, this invention is demonstrated. In the light-shielding photosensitive material roll, the entire light-shielding reader does not need to exhibit heat shrinkability, and only the first widened portion and the second widened portion need only have heat shrinkability. For example, a light-shielding reader in which a heat-shrinkable light-shielding piece is attached to a light-shielding sheet that does not particularly exhibit heat-shrinkability to form a widened portion can be used. An example of a light-shielding photosensitive material roll when such a light-shielding reader is used will be described with reference to FIGS.
[0021]
FIG. 7 shows the use of a heat-shrinkable light-shielding reader in which two heat-shrinkable light-shielding pieces are attached to the both sides of the light-shielding sheet along both side edges so as to protrude in the width direction. It is a perspective view of an example of a light-shielding photosensitive material roll. As in the light-shielding photosensitive material roll shown in FIG. 1, the light-shielding photosensitive material roll shown in FIG. 7 has a light-shielding reader wound around the photosensitive material roll two or more times. It is fastened with an adhesive tape 6.
[0022]
FIG. 8 is an exploded perspective view of an example of the light-shielding photosensitive material roll shown in FIG. The heat-shrinkable light-shielding reader 5 includes a light-shielding sheet 9 having a width substantially the same as the width of the photosensitive material roll, and heat-shrinkable light-shielding pieces 10a and 10b that exhibit a relatively large heat shrinkability in the length direction. . The heat-shrinkable light-shielding pieces are provided along both end portions so as to protrude in the width direction of the light-shielding sheet, and each has a length longer than the circumference of the disk-shaped light-shielding member. The width of the portion protruding from the light-shielding sheet of the heat-shrinkable light-shielding piece is preferably in the range of 5 to 20 mm, as in the case of the heat-shrinkable light-shielding reader partially expanded. The light shielding sheet 9 preferably has little or no heat shrinkability, and a plastic film mixed with a pigment such as carbon black can be used. The heat-shrinkable light shielding pieces 10a and 10b can be made of the same material as the heat-shrinkable light-shielding reader.
[0023]
FIG. 9 is a partial cross-sectional view of an example of the light-shielding photosensitive material roll shown in FIG. In the light-shielding photosensitive material roll of the present invention shown here, among the heat-shrinkable light-shielding pieces attached to the light-shielding sheet 9 of the heat-shrinkable light-shielding reader 5, the heat-shrinkability attached to the side closer to the photosensitive material sheet side. The heat-shrinkable property is inserted between the side surface of the photosensitive material roll 1 and the disk-shaped light-shielding member 4 (ring-shaped light-shielding sheet 4a) in a state where the light-shielding piece 10a is thermally contracted, and is attached to the side far from the photosensitive material sheet. The light-shielding piece 10b is in contact with the outer surface of the disk-shaped light-shielding member 4 in the heat-shrinked state.
[0024]
【The invention's effect】
In the light-shielding photosensitive material roll of the present invention, both ends of the light-shielding reader wound inside are inserted between the side surface of the photosensitive material roll and the disk-shaped light-shielding member due to thermal contraction of the light-shielding reader, and both ends of the light-shielding reader wound around the outside. Since the portion is in contact with the outer surface of the disk-shaped light shielding member, there is no need to wind the light-sensitive reader around the photosensitive material roll while stretching the light-shielding reader. Therefore, in the light-shielding photosensitive material roll of the present invention, it is difficult for the light-shielding leader to break during the production. In the light-shielding photosensitive material roll of the present invention, both end portions of the light-shielding reader wound inside are inserted between the side surface of the photosensitive material roll and the disc-shaped light-shielding member, and both ends of the light-shielding reader wound outside. Since the end is in contact with the outer surface beyond the outer edge of the disk-shaped light shielding member, the photosensitive material sheet can be stored for a long period of time without being exposed.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of a light-shielding photosensitive material roll using a heat-shrinkable light-shielding reader provided with two widened portions that are widened along both end portions so as to protrude in the width direction according to the present invention. It is.
2 is an exploded perspective view of an example of the light-shielding photosensitive material roll shown in FIG. 1. FIG.
FIG. 3 is a front view of an example of the heat-shrinkable light-shielding reader shown in FIG.
FIG. 4 is a partial cross-sectional view of an example of the light-shielding photosensitive material roll shown in FIG.
FIG. 5 is a front view showing another example of a heat-shrinkable light-shielding reader that can be used in the light-shielding photosensitive material roll of the present invention.
6 is a manufacturing process diagram of an example of the light-shielding photosensitive material roll shown in FIG. 1. FIG.
FIG. 7 shows a light-shielding photosensitizer using a light-shielding reader in which two heat-shrinkable light-shielding pieces are attached to both side portions of a light-shielding sheet along both side edges so as to protrude in the width direction according to the present invention. It is a perspective view of an example of a material roll.
8 is an exploded perspective view of an example of the light-shielding photosensitive material roll shown in FIG.
9 is a partial cross-sectional view of an example of the light-shielding photosensitive material roll shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Photosensitive material roll 2 Elongate photosensitive material sheet 3 Core 4 Disc-shaped light shielding member 4a Ring-shaped light shielding sheet 4b Hollow cylinder member 5 Heat-shrinkable light-shielding reader 5a Front end part 5b First widening part 5c Widening part connection part 5d Second Widened portion 5e End portion 6 Adhesive tape 7 Cut 8 Cut-out portion 9 Light-shielding sheet 10 Heat-shrinkable light-shielding piece

Claims

A photosensitive material roll formed by winding a long photosensitive material sheet around a core, and a disc shape having a radius substantially the same as the radius of the photosensitive material roll attached to each of both ends of the core of the photosensitive material roll The light-shielding member is bonded to the front end portion of the long photosensitive material sheet of the photosensitive material roll, the length is longer than twice the circumference of the disk-shaped light-shielding member, and the basic width is the long photosensitive material Two or more widenings that are substantially the same as the width of the sheet and are widened along the side edges so as to protrude in the width direction, each having a length longer than the circumference of the disk-shaped light shielding member The heat shrinkable light-shielding reader is provided with a portion, and one of the widened portions of the heat-shrinkable light-shielding reader is located between the side of the photosensitive material roll and the disk-shaped light-shielding member. Widened on the side far from the photosensitive material sheet There shielding photosensitive material roll, characterized in that in contact in a state of being heat-shrunk to the outer surface beyond the outer peripheral edge of the disk-shaped light shielding member.

The widened portion on the side far from the photosensitive material sheet of the heat-shrinkable light-shielding reader is in contact with the outer surface beyond the outer peripheral edge of the disk-shaped light-shielding member in a state of being heat-shrinked mainly in the length direction. The light-shielding photosensitive material roll according to claim 1.

A photosensitive material roll formed by winding a long photosensitive material sheet around a core, and a disc shape having a radius substantially the same as the radius of the photosensitive material roll attached to each of both ends of the core of the photosensitive material roll The light-shielding member is bonded to the front end portion of the long photosensitive material sheet of the photosensitive material roll, the length is longer than twice the circumference of the disk-shaped light-shielding member, and the width is the long photosensitive material sheet Two or more each having a length longer than the circumference of the disk-shaped light-shielding member along each side edge so as to protrude in the width direction on each side of the light-shielding sheet substantially the same as the width of The heat-shrinkable light-shielding piece is provided with a light-shielding reader, and one of the heat-shrinkable light-shielding pieces closer to the photosensitive material sheet is inserted between the side surface of the photosensitive material roll and the disk-shaped light-shielding member. Thermal contraction on the side far from the photosensitive material sheet Light-blocking photosensitive material roll shading piece is equal to or in contact in a state of being heat-shrunk to the outer surface beyond the outer peripheral edge of the disk-shaped light shielding member.

The heat-shrinkable light-shielding piece on the side far from the photosensitive material sheet is in contact with the outer surface beyond the outer peripheral edge of the disk-shaped light-shielding member in a state where the heat-shrinkable light piece is mainly heat-shrinked in the length direction. 4. A light-shielding photosensitive material roll according to 3.