JP4987114B2 - 弁当箱の蓋の製造方法 - Google Patents
弁当箱の蓋の製造方法 Download PDFInfo
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- JP4987114B2 JP4987114B2 JP2010226212A JP2010226212A JP4987114B2 JP 4987114 B2 JP4987114 B2 JP 4987114B2 JP 2010226212 A JP2010226212 A JP 2010226212A JP 2010226212 A JP2010226212 A JP 2010226212A JP 4987114 B2 JP4987114 B2 JP 4987114B2
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- cardboard
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Description
前記ヒートシール能を有する熱可塑性樹脂を前記厚紙状物の片面(表裏の一方)にコーティングするのが、コスト的にプラスチックに代替し得るということと、印刷可能ということから特に好ましい(請求項3)。現実に、両面にコーティングすると、現在の技術ではコスト高になりプラスチックに代替し得ない。
(1)パルプ及びパルプ以外の植物性繊維材料の1種若しくは2種以上から所定の大きさの厚紙状物に形成する。
(2)ヒートシール能を有する熱可塑性樹脂を塗布する。
(3)前記厚紙状物の四隅に側面片を形成する切断部を形成する。
(4)このようにして得た厚紙状物を凹凸一対のプレス金型で加熱プレスして弁当箱の蓋を形成する。
上端縁部の鍔状部分14を形成するため、図6に示すように、ロッド11,11´は凹部両側端よりもその分離れている。凹部10に段部を形成し、凸金型をこのような凹部に嵌合するような段部を形成した形状とし、凹金型と凸金型とが密接する段部で鍔状部分を形成しても勿論良い。
2・・・・・・底面
3,3´・・・・・・長い側面片
4,4´・・・・・・短い側面片
6,6´・・・・・・切断線
8・・・・・・容器
9・・・・・・凹金型
10・・・・・・凹部
11,11´・・・・・・ロッド
12,12´,12´´・・・・・・ガイド版
13・・・・・・四隅のコーナー部
Claims (8)
- 植物性繊維材料の1種若しくは2種以上から所定の大きさの厚紙状物に形成する工程と、該厚紙状物にヒートシール能を有する熱可塑性樹脂をコーティングする工程と、該厚紙状物の四隅に側面片を形成する切断部を形成する工程と、このようにして得た厚紙状物を凹凸一対のプレス金型で加熱プレスして弁当箱の蓋を形成する工程とを具備し、前記一方の対向する側面片は、他方の対向する側面片よりも先に起立するようにして凹金型上に載置し、この状態で凸金型で押圧加熱プレスして、側面片同士が貼着し、前記四隅のコーナーは、丸みを帯びるように形成したことを特徴とする弁当箱の蓋の製造方法。
- 前記切断部を漏斗状若しくは略Y字形に形成する請求項1記載の製造方法。
- 前記ヒートシール能を有する熱可塑性樹脂を前記厚紙状物の片面にコーティングする請求項1又は2記載の製造方法。
- 前記切断部は、先端角部若しくは切断線が、形成する弁当箱の蓋底面のコーナーに達するように形成されている請求項1〜3のいずれかに記載の製造方法。
- 前記切断部を20°〜60°の角度のV字形に形成する請求項4記載の製造方法。
- 前記凹金型の凹部周縁の一方の対向部に、凸状部を形成して、前記厚紙状物の一方の対向する該凸状部上の側面片は、他方の対向する側面片よりも先に起立するように構成する請求項1〜5のいずれかに記載の製造方法。
- 前記パルプ及びパルプ以外の植物性繊維材料の1種若しくは2種以上は、パルプとパルプ以外の植物性繊維材料との混合物である請求項1〜6のいずれかに記載の製造方法。
- 前記ヒートシール能を有する熱可塑性樹脂が、ポリエチレン又はポリプロピレンである請求項1〜7のいずれかに記載の製造方法。
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JP2010226212A JP4987114B2 (ja) | 2010-10-06 | 2010-10-06 | 弁当箱の蓋の製造方法 |
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JP2010226212A JP4987114B2 (ja) | 2010-10-06 | 2010-10-06 | 弁当箱の蓋の製造方法 |
Related Parent Applications (1)
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JP2005136957A Division JP4766593B2 (ja) | 2005-05-10 | 2005-05-10 | 食品収納容器の製造方法 |
Publications (3)
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JP2011037277A JP2011037277A (ja) | 2011-02-24 |
JP2011037277A5 JP2011037277A5 (ja) | 2011-07-07 |
JP4987114B2 true JP4987114B2 (ja) | 2012-07-25 |
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JP2010226212A Active JP4987114B2 (ja) | 2010-10-06 | 2010-10-06 | 弁当箱の蓋の製造方法 |
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Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001199425A (ja) * | 2000-01-14 | 2001-07-24 | Oji Paper Co Ltd | 段ボール製絞り成型容器及びその製造方法 |
JP2001233317A (ja) * | 2000-02-22 | 2001-08-28 | Nippon Dekishii:Kk | 密封性紙製容器およびその製造方法 |
JP2002331596A (ja) * | 2001-05-09 | 2002-11-19 | Nichiha Corp | 段ボール箱の組立方法及び組立装置 |
JP2004131091A (ja) * | 2002-10-08 | 2004-04-30 | Toppan Printing Co Ltd | 絞り成型前駆体および絞り成型体 |
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