JPH0238451B2 - - Google Patents
Info
- Publication number
- JPH0238451B2 JPH0238451B2 JP56194943A JP19494381A JPH0238451B2 JP H0238451 B2 JPH0238451 B2 JP H0238451B2 JP 56194943 A JP56194943 A JP 56194943A JP 19494381 A JP19494381 A JP 19494381A JP H0238451 B2 JPH0238451 B2 JP H0238451B2
- Authority
- JP
- Japan
- Prior art keywords
- opening
- lid
- polyethylene
- piece
- hole
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は開口片付蓋の製造方法に関し、特に容
易に円滑に美しく開口でき十分な耐圧強度を得る
ことができる開口片付蓋の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a lid with a single opening, and more particularly to a method of manufacturing a lid with a single opening that can be opened easily, smoothly and beautifully, and has sufficient pressure resistance.
開口用孔の穿設されたアルミニウム箔にポリエ
チレンを積層して成る蓋のポリエチレン層と、ア
ルミニウム箔にポリエチレンを積層して成る開口
片のポリエチレン層とを、前記開口用孔の領域で
互いに融着させることにより形成した従来の開口
片付蓋は、開口片を引張り剥離することによつて
アルミニウム箔に積層されたポリエチレン層が、
開口片の引張りにつれて開口用孔の端縁によつて
開口用孔の形状に沿つて切断され、開口すること
ができるように構成されているが、蓋のポリエチ
レン層と開口片のポリエチレン層とを開口用孔を
介して融着する為に開口用孔の領域で開口用孔の
端面の厚み、即ち蓋のアルミニウム箔の厚みだけ
段差が生ずる。この段差の為に融着が完全に行な
われず、エアーがランダムに開口用孔の周囲に残
るために、開口用孔の端縁によつて容易に美しく
円滑に切断されなかつたり、時には融着時の高熱
により発泡してポリエチレン層が破れ、エアーリ
ークができるなどの欠点があつた。 The polyethylene layer of the lid, which is made by laminating polyethylene on aluminum foil with opening holes, and the polyethylene layer of the opening piece, which is made by laminating polyethylene on aluminum foil, are fused together in the region of the opening holes. In the conventional lid with an opening piece, the polyethylene layer laminated on the aluminum foil is formed by pulling and peeling the opening piece.
As the opening piece is pulled, it is cut along the shape of the opening hole by the edge of the opening hole, so that it can be opened, but the polyethylene layer of the lid and the polyethylene layer of the opening piece are Since the parts are fused through the opening hole, a step is created in the region of the opening hole by the thickness of the end face of the opening hole, that is, the thickness of the aluminum foil of the lid. Because of this step, welding is not completed completely, and air remains randomly around the opening hole, making it difficult to cut easily and beautifully and smoothly by the edge of the opening hole, and sometimes during welding. The high heat caused the polyethylene layer to foam and tear, resulting in air leaks.
本発明は叙上の欠点を解消しようとするもの
で、予め開口用孔が形成されたアルミニウム箔と
ポリエチレン膜とから成る蓋に、アルミニウム箔
とポリエチレン膜とから成る開口片を、前記開口
用孔を被覆するように載置した後、前記蓋に対し
て前記開口片を熱圧着するに際し、前記開口用孔
の中央部から開口用孔の輪郭の直線部分又は曲率
の小さい曲線部分にかけて非接着部を残して熱圧
着することを特徴とする開口片付蓋の製造方法を
提供するものである。 The present invention aims to solve the above-mentioned drawbacks, and is to attach an opening piece made of aluminum foil and a polyethylene film to a lid made of aluminum foil and a polyethylene film in which opening holes are formed in advance. After placing the opening piece so as to cover it, when thermocompression bonding the opening piece to the lid, a non-bonded part is formed from the center of the opening hole to a straight line part of the outline of the opening hole or a curved part with a small curvature. The present invention provides a method for manufacturing a lid with an opening, which is characterized by thermocompression bonding while leaving an opening.
以下、図面に基いて本発明を詳細に説明する。 Hereinafter, the present invention will be explained in detail based on the drawings.
蓋１は薄い円盤状で、外面がアルミニウム箔２
で、内面がポリエチレン膜３で各々形成されてい
る。アルミニウム箔２には、予め開口用孔４が形
成されていて、内面のポリエチレン膜３が開口用
孔４から開口用孔４の形状に従つて外面に露出し
ている。この外面に露出しているポリエチレン膜
３には、後述するように開口片８が付着される。
また、開口用孔４は蓋１の中心部近くに曲率の大
きい開口始端５を、周縁部近くに曲率の小さい開
口終端６を、開口始端５と開口終端６の中間に直
線部分の開口側端７を各々有し、全体的になるべ
く角のない円滑な形状に形成されている。 The lid 1 has a thin disk shape, and the outer surface is covered with aluminum foil 2.
Each inner surface is formed of a polyethylene film 3. An opening hole 4 is previously formed in the aluminum foil 2, and the polyethylene film 3 on the inner surface is exposed from the opening hole 4 to the outer surface according to the shape of the opening hole 4. An opening piece 8 is attached to the polyethylene film 3 exposed on the outer surface as described later.
The opening hole 4 has an opening start end 5 with a large curvature near the center of the lid 1, an opening end 6 with a small curvature near the periphery, and a straight opening side end between the opening start end 5 and the opening end 6. 7, and are formed into a smooth shape with as few corners as possible as a whole.
開口片８は薄片状で、開口用孔４を被覆され、
開口用孔４から露出しているポリエチレン膜３に
附着されるべき部分と開口用つまみ９となるべき
部分とから成り、外面がアルミニウム箔１０で、
前記ポリエチレン膜３に付着されるべき面がポリ
エチレン１１で各々形成されている。 The aperture piece 8 has a thin flake shape and covers the aperture hole 4.
It consists of a part to be attached to the polyethylene film 3 exposed from the opening hole 4 and a part to become the opening knob 9, and the outer surface is made of aluminum foil 10.
The surfaces to be attached to the polyethylene film 3 are each made of polyethylene 11.
開口片８は、開口用孔４から露出しているポリ
エチレン１１および蓋１上面のポリエチレン３と
熱接着されているが、開口用孔４の中央部から開
口側縁７にかけて非圧着部１２を残して熱接着さ
れている。 The opening piece 8 is thermally bonded to the polyethylene 11 exposed from the opening hole 4 and the polyethylene 3 on the top surface of the lid 1, but a non-crimped portion 12 is left from the center of the opening hole 4 to the opening side edge 7. It is hot glued.
蓋１に開口片８を付着するには、まず、蓋１の
開口用孔４を被覆し、且つ、開口用つまみ９が開
口始端５の側に位置するように蓋１に開口片８を
載置する。この時、開口片８がみだりに所定の位
置からずれたりしないように接着剤または他の手
段によつて仮接着してもよい。 To attach the opening piece 8 to the lid 1, first cover the opening hole 4 of the lid 1, and place the opening piece 8 on the lid 1 so that the opening knob 9 is located on the opening start end 5 side. place At this time, the opening piece 8 may be temporarily bonded with adhesive or other means to prevent it from being unnecessarily displaced from the predetermined position.
次に蓋１に対して開口片８を、この開口片８が
被覆している開口用孔４の開口終端６に対する開
口始端５の近傍部Ｃを含む領域Ａで高温で熱圧着
する。 Next, the opening piece 8 is bonded to the lid 1 by thermocompression at a high temperature in an area A that includes the vicinity C of the opening end 5 and the opening end 6 of the opening hole 4 covered by the opening piece 8.
次に蓋１に対して開口片８を、この開口片８が
被覆している全領域Ｂで熱圧着するとともに、そ
の際、開口用孔４の中央部から開口用孔４の輪郭
の直線部分即ち開口側端７にかけて非接着部１２
を残して熱圧着する。非圧着部１２を残して熱圧
着するには、熱圧着する為の熱板に溝を穿設して
おくか、或いは受けゴムに溝を穿設して溝の部分
に圧力がかからないようにすればよい。 Next, the opening piece 8 is thermocompression bonded to the lid 1 in the entire area B covered by the opening piece 8, and at the same time, from the center of the opening hole 4 to the straight line part of the outline of the opening hole 4. That is, the non-adhesive portion 12 extends to the opening side end 7.
Heat and press, leaving the . To perform thermocompression bonding while leaving the non-crimped part 12, it is necessary to make a groove in the hot plate for thermocompression bonding, or to make a groove in the receiving rubber so that no pressure is applied to the groove part. Bye.
かくして高温と低温で二回熱圧着された領域の
うち、開口片８が被覆している開口用孔４の開口
終端６に対する開口始端５の近傍部Ｃは蓋１のポ
リエチレン３と開口片８のポリエチレン１１とが
開口用孔４を介し、この開口用孔４の端縁をはさ
むようにして完全に融着一体化されている。 In the area that has been thermocompressed twice at high and low temperatures, the area C near the opening end 5 of the opening hole 4 covered by the opening piece 8 with respect to the opening end 6 is the area where the opening piece 8 covers the polyethylene 3 of the lid 1 and the opening piece 8. Polyethylene 11 is completely fused and integrated with the polyethylene 11 through the opening hole 4 so as to sandwich the edges of the opening hole 4.
また、低温のみで熱圧着された領域のうち開口
片８が被覆している開口用孔４の開口終端６に対
する開口始端５の近傍部Ｃ以外の領域Ｄは蓋１の
ポリエチレン３と開口片８のポリエチレン１１と
が開口用孔４を介し、比較的弱く接着されている
とともに、部分Ｄの中にある非接着部１２は、接
着されないでエアーが貯つた状態にある。 In addition, among the areas thermocompressed only at low temperature, an area D other than the vicinity C of the opening start end 5 with respect to the opening end 6 of the opening hole 4 covered by the opening piece 8 is between the polyethylene 3 of the lid 1 and the opening piece 8. The polyethylene 11 is relatively weakly bonded to the polyethylene 11 through the opening hole 4, and the non-bonded portion 12 in the portion D is not bonded and air is stored therein.
更にまた、高温と低温及び低温のみで熱圧着さ
れた領域のうち開口片８が蓋１のアルミニウム箔
２を覆つている部分Ｅはポリエチレンとアルミニ
ウム箔に接着性のないところから開口片８が容易
に剥離しうる程度に蓋１のアルミニウム箔２に密
着されているに過ぎない。 Furthermore, in the area E where the opening piece 8 covers the aluminum foil 2 of the lid 1 among the areas thermocompressed at high and low temperatures and only at a low temperature, the opening piece 8 can be easily attached because there is no adhesive between the polyethylene and the aluminum foil. It is merely adhered to the aluminum foil 2 of the lid 1 to the extent that it can be peeled off.
また、もしポリエチレンとアルミニウム箔が接
着するようであれば、蓋１のアルミニウム箔２に
予めエポキシ樹脂のようなポリエチレンと相溶性
のない耐熱樹脂の被膜を形成しておいてもよい。 Further, if polyethylene and aluminum foil are to be bonded to each other, aluminum foil 2 of lid 1 may be coated with a heat-resistant resin such as epoxy resin that is incompatible with polyethylene in advance.
以上のように開口片８が蓋１に附着されている
ので、蓋１と密着している開口用つまみ９を蓋１
から剥して開口始端６側へ向けて引張ると開口始
端５の近傍部Ｃが開口用孔４の端縁をはさむよう
にして完全に融着されているので、開口用孔４の
端縁によつてポリエチレン３が開口始端５の形状
に沿つて確実に美しく切断され開口のきつかけが
得られる。 Since the opening piece 8 is attached to the lid 1 as described above, the opening knob 9 that is in close contact with the lid 1 is attached to the lid 1.
When it is peeled off and pulled toward the opening starting end 6 side, the vicinity C of the opening starting end 5 is completely fused to sandwich the edge of the opening hole 4. The polyethylene 3 is reliably and beautifully cut along the shape of the opening starting end 5, and the opening can be sharpened.
続いて、更に開口用つまみ９を開口終端６に至
るまで引張り剥離すると、開口片８に比較的弱く
接着されている領域Ｄのポリエチレン３が開口片
８の引張りにつれて開口用孔４の端縁によつて美
しく円滑に切断され蓋１を開口することができ
る。この時、非接着部１２は、開口用孔４の開口
側端７にその一端が位置している為に、ポリエチ
レン３とポリエチレン１１が非接着部１２の部分
で接着していなくとも、前記近傍部Ｃによつて美
しく開口する為のきつかけができていることとポ
リエチレンの直進方向に裂け易い性質とが相俟つ
て、開口側端７の端縁に沿つて美しく切断するこ
とができる。（補促的に説明すれば非接着部１２
が例えば開口始端５のような曲率の大きい部分に
位置しているとポリエチレン膜３は切断されない
ばかりか、蓋をいわゆるくしやくしやに変形させ
て商品価値を減じてしまう。）
本発明は以上のように構成されているので蓋１
のポリエチレン膜３と開口片８のポリエチレン膜
１とを開口用孔４を介して、熱圧着する際に、開
口用孔４の領域で段差が生じてエアーがランダム
に開口用孔４の周囲に貯まり、その為にエアーリ
ークができたり、開口が美しくできないという従
来の欠点を、開口に支障のない位置、即ち開口側
端７にその一端が位置する非接着部１２を設け、
熱板により熱圧着した場合にエアーをこの非接着
部に貯め、或いは非接着部から外部へ放散させる
ことによつて解消することができる。 Subsequently, when the opening knob 9 is further pulled and peeled off until it reaches the opening end 6, the polyethylene 3 in the region D, which is relatively weakly bonded to the opening piece 8, is attached to the edge of the opening hole 4 as the opening piece 8 is pulled. Therefore, the lid 1 can be opened beautifully and smoothly. At this time, since one end of the non-bonded part 12 is located at the opening side end 7 of the opening hole 4, even if the polyethylene 3 and polyethylene 11 are not bonded at the non-bonded part 12, the vicinity The combination of the part C providing a tight opening for a beautiful opening and the tendency of polyethylene to tear in the straight direction makes it possible to cut beautifully along the edge of the opening side end 7. (To give a supplementary explanation, the non-adhesive part 12
If the polyethylene film 3 is located at a portion with a large curvature, such as the opening starting end 5, not only will the polyethylene film 3 not be cut, but the lid will be deformed into a so-called comb or comb, reducing its commercial value. ) Since the present invention is configured as described above, the lid 1
When the polyethylene membrane 3 of the opening piece 8 and the polyethylene membrane 1 of the opening piece 8 are bonded by thermocompression through the opening hole 4, a step is created in the area of the opening hole 4, and air randomly flows around the opening hole 4. The conventional disadvantages of air leakage and unattractive openings are solved by providing a non-adhesive part 12 with one end located at a position that does not hinder the opening, that is, at the opening side edge 7.
When thermocompression bonding is performed using a hot plate, this problem can be solved by storing air in the non-bonded part or by dissipating air from the non-bonded part to the outside.
また、開口始端５の近傍部Ｃが内圧の影響の比
較的小さい蓋１の中央部に設けられ、且つ開口用
孔４に占める割合が過半を越えないようにしたの
で、耐圧強度が弱くなるとされる融着部分の耐圧
強度を向上させ、容器の内部圧力による破れが防
止され、さらに、開口始端５の近傍部Ｃ以外の領
域Ｄが、低温で接着され、融着されていないの
で、領域Ｄでの耐圧強度が高まり、開口用孔４の
全領の耐圧強度も相対的に高められる。 In addition, since the vicinity C of the opening start end 5 is provided in the center of the lid 1, where the influence of internal pressure is relatively small, and the proportion of the opening hole 4 is not more than half, the pressure resistance strength is considered to be weakened. The pressure resistance of the fused portion is improved, and tearing due to the internal pressure of the container is prevented. Furthermore, since the area D other than the area C near the opening starting end 5 is bonded at a low temperature and is not fused, the area D The pressure resistance of the opening hole 4 is increased, and the pressure resistance of the entire area of the opening hole 4 is also relatively increased.
実施例
開口片 アルミニウム50μ／ポリエチレン55μ
蓋 エポキシ樹脂／アルミニウム（一部孔あき）
60μ／ポリエチレン145μ
孔の形状 ドロツプ型
蓋に開口片を仮接着し、(A)領域を260℃の高温
で、また、(B)領域を190℃の低温で、非圧着部１
２を残して熱圧着した。(C)領域は完全に融着し、
(D)領域は弱く接着（凝似接着）し、(E)領域は密着
していた。Example opening piece Aluminum 50μ/Polyethylene 55μ Lid Epoxy resin/Aluminum (partially perforated)
60μ/Polyethylene 145μ Hole shape Drop type Temporarily adhere the opening piece to the lid, and place the (A) area at a high temperature of 260℃ and the (B) area at a low temperature of 190℃.
All but 2 were heat-pressed. (C) The region is completely fused;
The (D) region was weakly adhered (cohesive adhesion), and the (E) region was in close contact.
この蓋を直径63mmのカツプ状容器に被冠して加
圧したところ、40.0Kg／m2の圧力によつても破れ
ず、容器の蓋として充分な耐圧強度のあることが
確認された。また非常に容易に美しく開口するこ
とができた。 When this lid was placed on a cup-shaped container with a diameter of 63 mm and pressurized, it did not break even under a pressure of 40.0 kg/m 2 , confirming that it had sufficient pressure resistance as a container lid. It was also possible to open the opening very easily and beautifully.
図面は本発明の一実施例を示すもので、第１図
は本発明に係る蓋の平面図、第２図は同Ｘ−
X′断面図、第３図は本発明による開口片付蓋の
製造過程を示す平面図、第４図は同Ｙ−Y′断面
図、第５図は本発明により製造された開口片付蓋
の平面図、第６図は同Ｚ−Z′断面図、第７図は開
口片と蓋との各接着領域を示す説明図である。
１……蓋、２，１０……アルミニウム箔、３，
１１……ポリエチレン、４……開口用孔、５……
開口始端、６……開口終端、７……開口側端、８
……開口片、９……開口用つまみ、Ａ，Ｂ，Ｃ，
Ｄ，Ｅ……接着領域。
The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of a lid according to the present invention, and FIG.
3 is a plan view showing the manufacturing process of the lid with a single opening according to the present invention, FIG. 4 is a sectional view along YY' of the same, and FIG. FIG. 6 is a sectional view taken along the Z-Z' line, and FIG. 7 is an explanatory view showing each adhesive area between the opening piece and the lid. 1... Lid, 2, 10... Aluminum foil, 3,
11...Polyethylene, 4...Opening hole, 5...
Opening start end, 6... Opening end, 7... Opening side end, 8
...Opening piece, 9...Opening knob, A, B, C,
D, E... Adhesive area.
Claims (1)
熱可塑性合成樹脂が内面に積層された蓋の外面に
前記開口用孔を覆うべく開口片を設けてなる開口
片付蓋の製造方法に於いて、 前記開口片を接着するに際し、開口始端部に強
く接着する強接着部を設けるために、比較的高温
で加熱加圧し、開口終端部近傍においては、加熱
加圧しない非接着部を残して弱く接着する弱接着
部を設けるために、比較的低温で加熱加圧するこ
とを特徴とする開口片付蓋の製造方法。[Scope of Claims] 1. An opening formed by providing an opening piece on the outer surface of a lid in which an opening hole is bored and a thermoplastic synthetic resin is laminated on the inner surface to cover the opening hole. In the method for manufacturing a single-piece lid, when bonding the opening pieces, heat and pressure are applied at a relatively high temperature in order to provide a strong adhesive part that strongly adheres to the opening end, and heat and pressure are applied in the vicinity of the opening end. A method for manufacturing a lid with an opening, which is characterized by heating and pressurizing at a relatively low temperature in order to leave a non-bonded part that is not pressed and provide a weakly bonded part that is weakly bonded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56194943A JPS58118208A (en) | 1981-12-03 | 1981-12-03 | Lid with opening tongue and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56194943A JPS58118208A (en) | 1981-12-03 | 1981-12-03 | Lid with opening tongue and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58118208A JPS58118208A (en) | 1983-07-14 |
| JPH0238451B2 true JPH0238451B2 (en) | 1990-08-30 |
Family
ID=16332906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56194943A Granted JPS58118208A (en) | 1981-12-03 | 1981-12-03 | Lid with opening tongue and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58118208A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06551B2 (en) * | 1983-10-26 | 1994-01-05 | 大日本印刷株式会社 | Container with peeling tape |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3990603A (en) * | 1975-12-09 | 1976-11-09 | Minnesota Mining And Manufacturing Company | Easy open closure system |
| JPS5840048Y2 (en) * | 1978-02-03 | 1983-09-08 | 大日本印刷株式会社 | Aluminum lid with pull-opening piece |
-
1981
- 1981-12-03 JP JP56194943A patent/JPS58118208A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58118208A (en) | 1983-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5829618A (en) | Method of joining molded ring to brim of paper cup | |
| JPH0238451B2 (en) | ||
| JP2000289784A (en) | Container for microwave oven heated food | |
| JP2633041B2 (en) | Manufacturing method of sealed container | |
| JPS6229305B2 (en) | ||
| JPS58118209A (en) | Manufacture of lid with opening tongue | |
| JP2715148B2 (en) | Partially open container lid | |
| JP2994864B2 (en) | Easy-open sealed container | |
| JP3802924B2 (en) | Sealed container whose lid can be easily opened and its manufacturing method | |
| JPH0811881A (en) | Can lid | |
| JPH079805Y2 (en) | Inner seal material for container mouth sealing | |
| JPH0213289Y2 (en) | ||
| JP2751936B2 (en) | Easy-open sealed container | |
| JP2997127B2 (en) | Sealed container | |
| JP2687130B2 (en) | Method of forming envelope pasting part in paper container | |
| JPH0999978A (en) | Easy-open lid material and container using the lid material | |
| JPS5974058A (en) | Easy-open cover and its manufacture | |
| JPS5923992B2 (en) | Paper container manufacturing method | |
| JP2527845B2 (en) | Easy-open lid and method for manufacturing the same | |
| JP2819173B2 (en) | Thermoforming peel cover material | |
| JPH0212189Y2 (en) | ||
| JPH0285177A (en) | Sealing method for food packaging container | |
| JPH0242570Y2 (en) | ||
| JPH08175562A (en) | Easy-open cup-shaped container | |
| JPS62151235A (en) | Sealing method for metallic can and can cover for sealing |