WO2002059005A1 - Recipient et couvercle hermetique avec poignees de fermeture - Google Patents

Recipient et couvercle hermetique avec poignees de fermeture Download PDF

Info

Publication number
WO2002059005A1
WO2002059005A1 PCT/US2001/002434 US0102434W WO02059005A1 WO 2002059005 A1 WO2002059005 A1 WO 2002059005A1 US 0102434 W US0102434 W US 0102434W WO 02059005 A1 WO02059005 A1 WO 02059005A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
cover
wall
latch
lid
Prior art date
Application number
PCT/US2001/002434
Other languages
English (en)
Inventor
John M. Lown
Original Assignee
Snapware Corporation
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 Snapware Corporation filed Critical Snapware Corporation
Priority to PCT/US2001/002434 priority Critical patent/WO2002059005A1/fr
Priority to US10/204,684 priority patent/US20030015534A1/en
Priority to CA002401001A priority patent/CA2401001A1/fr
Priority to EP01959791A priority patent/EP1409361A1/fr
Priority to PCT/US2001/041317 priority patent/WO2002059007A1/fr
Publication of WO2002059005A1 publication Critical patent/WO2002059005A1/fr
Priority to US10/717,044 priority patent/US7090089B2/en

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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
    • B65D43/0218—Removable lids or covers without integral tamper element secured only by friction or gravity on both the inside and the outside of the mouth of the container
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0209—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together stackable or joined together one-upon-the-other in the upright or upside-down position
    • B65D21/0217—Containers with a closure presenting stacking elements
    • B65D21/0219—Containers with a closure presenting stacking elements the closure presenting projecting peripheral elements receiving or surrounding the bottom or peripheral elements projecting from the bottom of a superimposed container
    • 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
    • B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
    • B65D45/02—Clamping or other pressure-applying devices for securing or retaining closure members for applying axial pressure to engage closure with sealing surface
    • B65D45/16—Clips, hooks, or clamps which are removable, or which remain connected either with the closure or with the container when the container is open, e.g. C-shaped
    • B65D45/20—Clips, hooks, or clamps which are removable, or which remain connected either with the closure or with the container when the container is open, e.g. C-shaped pivoted
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00453—Contact between the container and the lid in a peripheral U-shaped channel of the container
    • B65D2543/00462—Contact between the container and the lid in a peripheral U-shaped channel of the container peripheral U-shaped channel of the lid

Definitions

  • This invention relates generally to a container for storing foods, liquids and other articles and a replaceable cover or lid capable of providing a tight seal and more particularly to the container cover which is suitable for use in microwave cooking and in automatic dish washers.
  • Food storage containers are generally made of a plastic material such as polypropylene or polyethylene polymers or copolymers. Such containers are normally fairly rigid, but may be subject to some amount of flexure especially where the lid or cover is arranged to be peeled off of the container mouth. Most such container/lid configurations provide a sealing bead or rim along the upper wall of the container with a mating channel on the lid which engages the bead as well as the adjacent inner and outer surfaces of the container wall. Such sealing arrangements generally require considerable effort to force the lid onto the sealing bead during the closing procedure and perhaps greater effort to peal the lid away from the container during the opening process.
  • lids While some lids are provided with one or more outwardly extending tabs to accommodate a user's fingers, the opening procedure may be quite difficult for a person suffering from arthritis or tendinitis. In addition, the lids of such sealable containers often become distorted through heating, dishwashing or refrigeration procedures making lid replacement difficult or impossible. In addition containers designed for microwave use are generally provided with a separate vent located in the lid for preventing pressure build up.
  • a separate sealing member such as an 0-ring or annular gasket is disposed between the container rim and the lid channel to provide a more secure seal.
  • Such designs may rely on frictional forces to maintain the lid in place on the container or may rely on latching arms carried by the lids which engage retention lips on the container.
  • the separate sealing member i.e., 0-ring or gasket involves not only added manufacturing costs, but is subject to being misplaced or lost during use of the container.
  • a container in accordance with the present invention includes a bottom wall and an upstanding peripheral wall terminating in an upper edge surrounding an open top or mouth. At least an upper portion of the wall is inclined outwardly at a slight angle to the vertical, e.g., 2°-5°, when the bottom wall is positioned in a horizontal plane. While the container is preferably rectangularly-shaped it may also be circular or oval in shape .
  • a replaceable cover which includes a top, preferably dish-shaped, with a planar top wall terminating in a downwardly extending outer rim flange or skirt.
  • the skirt is arranged to fit over a substantial portion of the upper edge of the container.
  • the cover includes a downwardly extending inner sealing flange which forms an interference fit with the inside surface of the upper portion of the container wall when the cover is pressed downwardly over the mouth or open top of the container.
  • a pair of latch handles are pivotally mounted on opposite sides of the cover along the outer rim flange thereof with each latch handle being provided with a protruding locking tab arranged to snap under a section of the peripheral upper edge of the container wall when the latch handle is rotated downwardly to lock the cover in a sealing relationship over the container mouth. Also when one of the latch handles is rotated to its unlocked position expanded fluid within the container will cause the lid (or a portion thereof) to rise slightly during microwave cooking to provide the necessary venting action to prevent excess pressure build-up.
  • Fig. 1 is a perspective top view of a container and cover in accordance with the present invention showing the cover in a separated condition with the latch handles unassembled;
  • Fig. 2 is a perspective bottom view of the container/cover of Fig. 1 showing the bottom of the cover and container in some detail;
  • Fig. 3 is a top plan view of the container
  • Fig. 4 is a cross-sectional view of the container taken along lines 4-4 of Fig. 3 showing the angle that the upper portion of the container side wall makes with the vertical;
  • Fig. 5 is a bottom plan view of the cover
  • Fig. 6 is a side elevational view of the cover
  • Fig. 7 is a cross-sectional view of the cover taken along lines 7-7 of Fig. 5;
  • Fig. 8 is a top plan view of one of the latch handles
  • Fig. 9 is a bottom plan view of a latch handle
  • Fig. 10 is a side elevational view of a latch handle
  • Fig. 11 is a bottom plan view of the container and cover in an assembled and locked position
  • Fig. 12 is a top perspective view of the container and cover with one of the latch handles rotated to its fully upright position illustrating the simultaneous application of upward pressure to the latch handle and downward pressure to the cover for breaking the . seal and releasing the cover from the container;
  • Fig. 13 is a side elevational view of the container and cover in an assembled and locked position;
  • Fig. 13a is a enlarged sectional view of the right medial end of the assembled container and cover showing (a) the interference fit between the cover sealing flange and the inside surface of the upper portion of the container side wall and (b) the configuration of the end section of the cover overlying the container handle.
  • the container 10 of the present invention includes a flat bottom wall 12 which merges at its periphery, via a rounded corner 14, with a peripheral wall, comprising end walls 16 and side walls 18.
  • a peripheral wall comprising end walls 16 and side walls 18.
  • the end and side walls of the container 10 are merged, via rounded corners 20, as shown.
  • the peripheral wall (16, 18) terminates in an upper edge 22, via an outwardly extending convex shaped segment 24.
  • the edge 22 surrounds and defines an open top or mouth 24 of the container 10 and forms a pair of horizontally protruding handles 26 above the end walls 16 as shown.
  • the top surface of the handles are substantially level with the plane of the edge 22 simplifying the manufacturing process and allowing the cover to overlie the handles as illustrated for example in Fig. 12 to be described.
  • the bottom wall 12 of the container projects downwardly at the corners forming triangular shaped protruding feet 28.
  • the peripheral wall (16,18) has a slight convex surface, preferably formed along a radius R of about 75 inches, so that an upper section 30 of the peripheral wall (extending below the curved segment 24) is disposed at about an angle ⁇ of 2° to 5° and preferably about 3° to the vertical with the bottom 12 lying in a horizontal plane as is illustrated in Fig. 4.
  • This slight angle facilitates the entry of a peripheral sealing flange or fin 44 on the cover, as will be explained in more detail, to enter the mouth of the container and form an interference or sealing fit with an inside rectangular sealing surface area within the section 30 when a cover 32 is seated onto the container. See Figs. 11 and 12.
  • a replaceable cover or lid 32 for use with the container 10 is formed with a generally planar depressed wall section 34 which merges with an upwardly inclined peripheral section 36 joined along apex 37 to a downwardly extending outer rim flange or skirt 38.
  • the top of the cover, i.e., wall 34 and section 36 forms a dish-like shape for receiving the bottom of a like container/lid combination in a nesting arrangement.
  • the outer flange or skirt 38 is interrupted by a pair of axel sections 40 which are spaced from the adjacent wall section 34 as is illustrated in Figs. 1 and 5 to receive latching handle 48 to be described.
  • the skirt 38 fits over the upper edge of the container except for the axel portions.
  • the cover 32 includes extended end sections 42 which fit over the top of the container handles 26 in the assembled condition.
  • the end sections 42 define slightly depressed oblong sections 43 which overlie and accentuate the container handles. See Fig. 13a.
  • the cover 32 further includes a downwardly extending inner sealing flange or fin 44 positioned inwardly of the outer skirt 30.
  • the fin 44 preferably has a slightly greater periphery than the periphery of at least the lower rectangular portion 30a of section 30 of the peripheral wall of the container so that lower end of the fin 44 is deflected slightly inwardly by the wall portion 30a in the assembled condition. The slight deflection enhances an interference and sealing fit between the fin 44 and the inside surface of the container peripheral wall. See, for example, Fig. 13a.
  • Spaced vertical ribs 46 are formed along the underside of the peripheral section 36 and the inner side of skirt 38 as shown in Fig. 2 to provide structural rigidity and seat on the upper edge 22 of the container.
  • each latch handle is formed with an upper surface 48a including an outwardly extending finger engaging surface 48b, a back wall 48c and a lower surface.
  • the lower surface is formed with a pair of short protruding spaced inner walls 48d which together with the back wall form two semicircular recesses 48e with downwardly faced openings 48f for receiving an associated axel 40.
  • the lower latch handle surface further forms a downwardly protruding locking tab 48g for engaging the lower edge 50a of an associated locking hook 50 on the container wall. Additionally the lower latch handle surface includes a finger engaging surface 48h.
  • the latch handles are assembled to the cover or lid 32 by spreading the inner walls 48 slightly away from the back wall 48c (in a snapping action) to allow each axel to enter the respective recess 48e.
  • the back wall 48c of each latch handle limits the rotational movement of the associated latch handle to about 90° by engaging the edge 34a of the wall 34 when the upper surface of the handle is about parallel to the surface 34.
  • the edge 34a may include a small upward curvature formed as part of the arched peripheral section 36.'
  • the container 10 may be made (i.e., injection molded) of a suitable rigid or semi-rigid plastic such as polypropylene, but is preferably made of polycarbonate which is suitable for microwave and conventional dishwasher use. While the bottom of the container may be frosted the sides are preferably transparent or translucent to enable the food or material stored in the container to be readily viewed. It should be noted that to vent excess gas pressure from the container interior (as a result of cooking) it is only necessary to unlatch one of the latch handles.
  • the cover or lid 32 as well as the latch handles may also be made of a suitable plastic, but are preferably made of polypropylene, having sufficient rigidity so that the inner flange of skirt 44 forms an interference or sealing fit with the inner surface of the container wall in the assembled condition.
  • the cover also preferably has sufficient beam strength and flexibility so that when an upward force is exerted on the finger engaging lower surface 48h of one or both latch handles (when in their upward most position) and a downward force is exerted on the planar top cover surface adjacent the latch handle the outer rim flange 38 will flex outwardly and upwardly to break the seal and disengage the cover from the container. This feature adds to the user friendliness of the container/lid arrangement and particularly for persons suffering from arthritis or tendinitis of the hands an wrists.
  • the cover 32 with the latch handles assembled thereon may be placed over the mouth or top 24 of the container 10 and then pressed downwardly until the ribs 46 are seated on the container's upper edge 22. In this position the inner sealing flange 44 forms an interference fit with the inside of the container peripheral wall.
  • the latch handles may then be easily rotated to a closed position by pressing downwardly and inwardly on the finger engaging surfaces 48b until the locking tabs 48g snap under the locking hooks 50.
  • latch handle (or both) may be rotated to its upper most position and pressed upwardly (e.g., by a finger 52) while an area of the planar surface of the cover adjacent the handle is simultaneously pressed downwardly (e.g., by a thumb 54). This simple maneuver causes the surface 34 to assume a slightly concave bow to break the seal and release the cover from the container. See Fig. 12.
  • the storage container/cover can be made in a variety of sizes, i.e., lengths, widths and depths (e.g., 12" x 7 V x 2" etc.), with or without a designed stacking system.
  • the container with the cover removed may be used as a serving dish.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

L"invention concerne un récipient (10) et un couvercle (32) pouvant être fermé hermétiquement, ce récipient possédant une paroi de fond (12) et une paroi périphérique droite se terminant par un bord supérieur (22) entourant une ouverture (24). La paroi périphérique est inclinée vers l"extérieur dans un faible angle par rapport à la verticale. Un couvercle remplaçable (32) possède une paroi (34) supérieure centrale plane et une périphérie en forme de U inversé se terminant en jupe (38) de rebord extérieur. Une ailette de fermeture (44) adjacente s"étendant vers le bas est placée vers l"intérieur de la jupe pour former un ajustement serré avec la surface intérieure de la partie supérieure de la paroi périphérique du récipient lorsque le couvercle est placé sur l"ouverture du récipient. Une paire de fermetures (48) sont montées de façon rotative sur le couvercle, adjacentes à la jupe de rebord extérieur, et conçues pour se mettre en prise avec des crochets (50) de fermeture en saillie sur la paroi périphérique du récipient, de manière à fixer de façon amovible le couvercle sur l"ouverture du récipient.
PCT/US2001/002434 2001-01-25 2001-01-25 Recipient et couvercle hermetique avec poignees de fermeture WO2002059005A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/US2001/002434 WO2002059005A1 (fr) 2001-01-25 2001-01-25 Recipient et couvercle hermetique avec poignees de fermeture
US10/204,684 US20030015534A1 (en) 2001-01-25 2001-07-10 Container and sealing cover
CA002401001A CA2401001A1 (fr) 2001-01-25 2001-07-10 Contenant et couvercle de fermeture
EP01959791A EP1409361A1 (fr) 2001-01-25 2001-07-10 Contenant et couvercle de fermeture
PCT/US2001/041317 WO2002059007A1 (fr) 2001-01-25 2001-07-10 Contenant et couvercle de fermeture
US10/717,044 US7090089B2 (en) 2001-01-25 2003-11-19 Container and sealing cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/002434 WO2002059005A1 (fr) 2001-01-25 2001-01-25 Recipient et couvercle hermetique avec poignees de fermeture

Publications (1)

Publication Number Publication Date
WO2002059005A1 true WO2002059005A1 (fr) 2002-08-01

Family

ID=21742273

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2001/002434 WO2002059005A1 (fr) 2001-01-25 2001-01-25 Recipient et couvercle hermetique avec poignees de fermeture
PCT/US2001/041317 WO2002059007A1 (fr) 2001-01-25 2001-07-10 Contenant et couvercle de fermeture

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2001/041317 WO2002059007A1 (fr) 2001-01-25 2001-07-10 Contenant et couvercle de fermeture

Country Status (3)

Country Link
EP (1) EP1409361A1 (fr)
CA (1) CA2401001A1 (fr)
WO (2) WO2002059005A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1466834A1 (fr) * 2003-04-08 2004-10-13 Hana Cobi Co., Ltd. Récipient pour produits alimentaires
EP1481917A1 (fr) * 2003-05-29 2004-12-01 Lombardo Vincenzo Récipient pour produits alimentaires
WO2007065225A1 (fr) * 2005-12-09 2007-06-14 Andrew Kirsh Recipient a joint fluide
CN113830424A (zh) * 2021-09-14 2021-12-24 汕头方大印刷包装科技有限公司 一种便于日常使用的自热纸袋及其使用方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ534244A (en) 2004-07-20 2007-05-31 Foodcap Int Ltd Product distribution methods and apparatus
JP2008516856A (ja) 2004-10-15 2008-05-22 フードキャップ インターナショナル リミテッド 生鮮品の調熱方法および装置
US8317052B2 (en) * 2004-10-15 2012-11-27 Foodcap International Limited Container, lid and clip therefor
NZ537287A (en) * 2004-12-14 2005-10-28 Sist Plastics Ltd Moulded lid assembly with pivoting latch and stop formation to restrict the latch being levered free of the lid
CN101857098A (zh) * 2010-06-02 2010-10-13 东莞市精丽制罐有限公司 一种压盖式包装盒
SE543489C2 (en) * 2019-12-18 2021-03-09 Hydro Extruded Solutions As A lock arrangement for a container
USD906767S1 (en) 2020-07-29 2021-01-05 E. Mishan & Sons, Inc. Food storage container

Citations (7)

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US3688942A (en) * 1970-11-20 1972-09-05 Continental Can Co Container and closure combination
US3811597A (en) * 1972-04-17 1974-05-21 Continental Can Co Plastic container
US4034889A (en) * 1975-10-03 1977-07-12 Mauser Kommanditgesellschaft Plastic container-cover assembly
US4561562A (en) * 1983-01-13 1985-12-31 Thermo-Serv, Inc. Container and closure assembly
US5356026A (en) * 1993-03-22 1994-10-18 Plastics, Inc. Double seal container
US5641090A (en) * 1994-11-14 1997-06-24 Rubbermaid Commercial Products Inc. Lid for refuse a container
US5641065A (en) * 1995-06-22 1997-06-24 Paragon Group Of Plastics Companies, Inc. Medical instrument soaking, transporting and storage container

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Publication number Priority date Publication date Assignee Title
DE4240327C2 (de) * 1992-12-01 1994-10-13 Berner Kunststofftech Gmbh Verpackung aus Kunststoff mit Originalitätsverschluß
JP2597037Y2 (ja) * 1993-10-12 1999-06-28 住友電装株式会社 電気接続箱の嵌合構造
US5979691A (en) * 1998-04-10 1999-11-09 Von Holdt; John W. Container and locking lid
US6269969B1 (en) * 2000-05-05 2001-08-07 Kimberly-Clark Worldwide, Inc. Wet wipes container with improved closure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688942A (en) * 1970-11-20 1972-09-05 Continental Can Co Container and closure combination
US3811597A (en) * 1972-04-17 1974-05-21 Continental Can Co Plastic container
US4034889A (en) * 1975-10-03 1977-07-12 Mauser Kommanditgesellschaft Plastic container-cover assembly
US4561562A (en) * 1983-01-13 1985-12-31 Thermo-Serv, Inc. Container and closure assembly
US5356026A (en) * 1993-03-22 1994-10-18 Plastics, Inc. Double seal container
US5641090A (en) * 1994-11-14 1997-06-24 Rubbermaid Commercial Products Inc. Lid for refuse a container
US5641065A (en) * 1995-06-22 1997-06-24 Paragon Group Of Plastics Companies, Inc. Medical instrument soaking, transporting and storage container

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1466834A1 (fr) * 2003-04-08 2004-10-13 Hana Cobi Co., Ltd. Récipient pour produits alimentaires
EP1481917A1 (fr) * 2003-05-29 2004-12-01 Lombardo Vincenzo Récipient pour produits alimentaires
WO2007065225A1 (fr) * 2005-12-09 2007-06-14 Andrew Kirsh Recipient a joint fluide
CN113830424A (zh) * 2021-09-14 2021-12-24 汕头方大印刷包装科技有限公司 一种便于日常使用的自热纸袋及其使用方法
CN113830424B (zh) * 2021-09-14 2023-01-31 汕头方大印刷包装科技有限公司 一种便于日常使用的自热纸袋及其使用方法

Also Published As

Publication number Publication date
WO2002059007A1 (fr) 2002-08-01
EP1409361A1 (fr) 2004-04-21
CA2401001A1 (fr) 2001-08-01

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