CN109264175A - A kind of releasing pressure automatically sealing cover of food container - Google Patents
A kind of releasing pressure automatically sealing cover of food container Download PDFInfo
- Publication number
- CN109264175A CN109264175A CN201811218229.7A CN201811218229A CN109264175A CN 109264175 A CN109264175 A CN 109264175A CN 201811218229 A CN201811218229 A CN 201811218229A CN 109264175 A CN109264175 A CN 109264175A
- Authority
- CN
- China
- Prior art keywords
- film
- main body
- lid main
- sealing cover
- needle tip
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 70
- 235000013305 food Nutrition 0.000 title claims abstract description 35
- 229920003023 plastic Polymers 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 19
- 238000001746 injection moulding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- B65D51/00—Closures not otherwise provided for
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
Abstract
The invention discloses a kind of releasing pressure automatically sealing covers of food container, including the lid main body and sealing by plastic material integrated injection molding machine-shaping, it is designed using thinning the part of lid main body, form film, the part that lid main body removes film is thin-walled; the thickness of thin-walled is greater than the thickness of film, and thin-walled is equipped with needle tip in film week at.Compared with traditional technology, sealing cover of the invention is easy the film being punctured when design in lid main body is by cutting force, become using lid main body hot drum bulging, needle tip automatic cutting film forms pin hole and realizes pressure release, so that in the sealing cover of food containers, outer air keeps balance, carry out microwave rate heating etc. in sealed states suitable for food container, it prevents under the use state that microwave stove heating etc. has hot gas, the box body of sealing cover and food containers excessively loses sealing cooperation because hot drum is swollen, even sealing cover is flown by bullet, safety in utilization of the invention greatly improves.
Description
Technical field
The invention belongs to food container fields, and in particular to a kind of releasing pressure automatically sealing of food container
Lid.
Background technique
Currently, the container for food packaging is varied, the plastic casing of lid is most commonly had, food is put into
In plastic casing, lid is covered, is put into refrigerator, certain fresh-keeping effect can be played, but often due between lid and box body
Sealing effect is bad, bacterium easy to breed.
Further, occur sealing cover on the market, i.e., tightness is good between sealing cover and box body, sealing cover and box body it
Between accommodating cavity be in close to the state that is fully sealed, the inside and outside atmosphere draught-free of accommodating cavity.When food will be put into microwave stove heating
When, it needs to remove lid, will affect heating effect in this way.If in addition, the plastic casing for being stamped sealing cover is directly placed into microwave
Heating in furnace, may be since when gases are heated, they expand in accommodating cavity, and the inside and outside imbalance of pressure of accommodating cavity causes sealing cover and box body
Between locally burst separation and lost between sealing cover and box body sealing cooperation in addition sealing cover directly flown by hot gas bullet, deposit
In security risk.
It is swift and violent that industry development is taken out now, and takes out industry and is usually packaged with plastic casing, and is packaged the plastics of warm-served food
Box equally exists above-mentioned plastic casing and puts the drawbacks of microwave stove heating uses and security risk etc..
Summary of the invention
In view of this, it is applicable in micro-wave oven closing lid heated sealed the purpose of the present invention is to provide a kind of structure is simple, it can be real
Existing releasing pressure automatically, and the releasing pressure automatically sealing cover of the food container of plastic casing leakproofness is not influenced.
In order to achieve the above objectives, the technical scheme is that
A kind of releasing pressure automatically sealing cover of food container, including the lid master by plastic material integrated injection molding machine-shaping
Body and for the sealing with box body sealing cooperation, the sealing position in the peripheral side of the lid main body, the lid main body
Part is designed using thinning, and the film being easily broken off when being formed by cutting force, the lid main body removes the part of the film
For thin-walled, the thickness of the thin-walled is greater than the thickness of the film, and the film is located relatively on the walled thickness direction
Bottom, middle part or top, the thin-walled in film week along place equipped with when the lid main body hot drum is swollen automatic cutting with
It punctures the film and forms pin hole with the needle tip of pressure release, the film is located at the peripheral part of the lid main body, the needle tip
Between the film and the sealing.
Further, the sealing, which has, is folded upward at the side wall extended to form by the week edge of the lid main body, described
The upper surface of needle tip is equipped with to the reinforcing rib for applying downward pressure because of the swollen needle tip for arching upward deformation upwards of hot drum, described
Reinforcing rib is fixed on the side wall of the sealing.
Further, the needle tip is in sawtooth strip.
Further, the needle tip includes slip and land, and the land is located at all edges of the film, the needle point
The thickness in portion is gradually become smaller from the slip to the land direction.
Further, the film and needle tip are set to the maximum position of deformation quantity of arching upward when hot drum is swollen in the lid main body
It sets.
Further, the lid main body is square, and the film and needle tip are set to the diagonal angle of the lid main body.
Further, the film is arc strip film, and the arc strip film includes sequentially connected first segment, middle section and the
Two sections, the needle tip is arranged corresponding to the middle section, and the width of the arc strip film is from the first segment toward the second segment
Direction gradually become smaller and become larger again, the width of the first segment and second segment is respectively greater than the width in the middle section.
Further, the maximum width in the middle section is 5mm or less.
Further, state thin-walled wall thickness be less than 0.6mm, the film with a thickness of 0.02-0.05mm.
After adopting the above technical scheme, a kind of releasing pressure automatically sealing cover of food container of the present invention, has with following
Beneficial effect: the film for being easily broken off and (being punctured) when design in lid main body is by cutting force utilizes lid main body hot drum bulging
Become, needle tip automatic cutting film forms pin hole and realizes pressure release, so that the inside and outside air of the sealing cover of food containers keeps flat
Weighing apparatus, carries out microwave rate heating etc. in sealed states suitable for food container, prevents having hot gas in microwave stove heating etc.
Under use state, the box body of sealing cover and food containers excessively loses sealing cooperates or even sealing cover is flown by bullet etc. because hot drum is swollen
Security risk.Since pin hole is smaller, the leakproofness of food containers is not influenced when heated；Further, since plastic thin-wall parts have
Certain elastic plastics characteristic, when not heating, lid main body does not occur that hot drum is swollen, and lid main body is not stretched, and pin hole is closed automatically, because
This, sealing cover of the invention has self-control, is able to achieve releasing pressure automatically etc., ensure that safety in utilization.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the sectional view of film and needle tip of the invention；
Fig. 3 is the cross-sectional view of sealing cover of the invention along center axis thereof；
Fig. 4 is the structural schematic diagram of another angle of the invention.
In figure:
Lid main body -01；Sealing -02；
Inner sidewall -03；Groove top -04；
External groove sidevall -05；Film -06；
Thin-walled -07；Needle tip -08；
Reinforcing rib -09；Land -10.
Specific embodiment
In order to further explain the technical solution of the present invention, being explained in detail below by specific embodiment the present invention
It states.
A kind of releasing pressure automatically sealing cover of food container of the present invention, is suitable for the sealed packages such as round, rectangular,
Especially superthin food container, such as fast food to-go box etc..Releasing pressure automatically sealing cover of the invention forms work using superthin plastic
Skill is process, and processes raw material and the plastics such as PP can be used, and the thin-walled workpiece of plastics has certain elastic plastics characteristic.
Releasing pressure automatically sealing cover of the invention, as Figure 1-Figure 4,01 He of lid main body including integrated injection molding machine-shaping
For the sealing 02 with box body sealing cooperation.It is reference with the use state of sealing cover, with the cooperation of sealing cover 02 and box body
Face is bottom surface, and using the corresponding one side in bottom surface as top surface, the central point position with sealing cover is interior, the radiation side of central point
To be outer, sealing 02 is located at the peripheral side of lid main body 01.The week edge of lid main body 01 upwardly extends to form inner sidewall 03, inner sidewall
03 upper end edge outward bending extends to form groove top 04, the outer end edge of groove top 04 bends downward and extends to form external groove sidevall 05, inside
Wall 03, groove top 04 and external groove sidevall 05 constitute the annular ditch groove that Open Side Down, convenient for realizing sealing cooperation with box body.Inner sidewall 03,
Sealing 02 is collectively formed in groove top 04 and external groove sidevall 05, i.e., sealing 02, which has, is folded upward at extension shape by the week edge of lid main body 01
At inner sidewall 03.Preferably, the lower end edge of external groove sidevall 05 can continue to extend to form operation portion outward, grasp convenient for uncapping with box cover
Make etc..It should be noted that the corresponding of superthin food container common on the market can be used in the structure of sealing 02 in the present invention
Sealing structure is in hermetically sealed to be able to achieve the cooperation of lid and box body.
The part of lid main body 01 is designed using thinning, forms film 06, the part that lid main body 01 removes film 06 is thin-walled
07, the thickness of thin-walled 07 is greater than the thickness of film 06.In the present embodiment, the thickness of thin-walled 07 is preferably 0.4mm, the thickness of film 06
Degree is preferably 0.02mm.Film 06 is located relatively at bottom, middle part or the top that thin-walled 07 is located on thickness direction.When opposite position
When the bottom of thin-walled 07, the bottom surface flush of film 06 and thin-walled 07, when being located relatively at top, film 06 and thin-walled 07
Top surface flush.It is illustrated so that film 06 is located relatively at the middle part that thin-walled 07 is located on thickness direction as an example below.Thin-walled 07
Needle tip 08 was equipped in film 06 week, needle tip 08 is used to that heat to occur due to the hot gas in food containers in lid main body 01
Automatic cutting film 06 forms pin hole with pressure release, so that the inside and outside air of sealing cover keeps balance when bulging.Film 06 is located at lid master
The peripheral part of body 01, needle tip 08 is between film 06 and the inner sidewall of sealing 02.
It should be noted that (1) present invention in, when the wall thickness of thin-walled 07 be less than 0.6mm when, film 06 with a thickness of
0.02-0.05mm；When the wall thickness of thin-walled 07 be greater than 0.6mm when, film 06 with a thickness of the 0.0125~0.05 of 07 thickness of thin-walled
Times.(2) when film 06 is located relatively at the bottom that thin-walled 07 is located on thickness direction, more conducively film 06 is automatic when hot drum is swollen
It is broken (being punctured) and forms pin hole with pressure release.When film 06 is located relatively at the top that thin-walled 07 is located on thickness direction, more
Cause film 06 to be punctured to form pin hole with pressure release conducive to user's Manual press force.
Needle tip 08 is in sawtooth strip.Needle tip 08 includes slip and land 10, and land 10 is located at all edges of film 06, needle
The thickness of tip 08 is gradually become smaller from the slip to 10 direction of land, so that 10 stress of land is more concentrated, is convenient for 06 quilt of film
It punctures to form pin hole.
The upper surface of needle tip 08 is equipped with reinforcing rib 09.In the present embodiment, the quantity of reinforcing rib 09 is three.Three reinforcements
Muscle 09 distributes alternately.Reinforcing rib 09 is fixed on inner sidewall 03.Using the state of the not heated bulging of lid main body 01 as original state,
Under original state, lid main body 01 keeps formation state.After lid main body 01 and the hermetically sealed lid of box body close, when lid main body 01 is because of food
The factors hot drum such as temperature it is swollen arched upward when deforming upwards, the plastic materials such as PP with elastic plastics characteristic are stretched, film 06 by
To upward bulging pressure, meanwhile, needle tip 08 has the trend to arch upward, but due to the effect of reinforcing rib 09, needle tip 08
The stability of its location status can be kept, correspondingly, the film 06 that reinforcing rib 09 is swollen to hot drum applies a downward anti-arch pressure
Power, the upward bulging pressure that film 06 is subject to form phase shear force (i.e. the cutting force of land 10) with downward anti-arch pressure, when
Bulging pressure and the difference of anti-arch pressure are bigger, and the phase shear force of the two is bigger, finally after phase shear force reaches certain numerical value, land
06 part of film at 10 is broken, i.e., film is punctured to form pin hole, i.e., land 10 cuts film 06 and forms pin hole, is realized
Releasing pressure automatically；When the hot gas in food containers disappears when air pressure balance (sealing cover inside and outside), the lid main body 01 to arch upward is restored
Original state, i.e. holding formation state, form the plastics such as the PP of pin hole and are no longer stretched, then pin hole is closed automatically, is not influenced
The leakproofness of food containers is particularly suitable for micro-wave oven closing lid heated sealed etc..
Film 06 and needle tip 08 are set to deformation quantity maximum position when hot drum is swollen in lid main body 01.The shape of lid main body 01
Shape is shape common in industry, such as round, rectangular etc..In the present embodiment, lid main body 01 is in rectangular shape, for rectangular
For lid main body 01, along its cornerwise position can arch upward space maximum.Preferably, film 06 and needle tip 08 are set to lid master
The diagonal angle of body 01.The diagonal chamfer machining respectively of four of lid main body 01 forms circular arc chamfering.Correspondingly, film 06 is arc strip
Film, arc strip film include sequentially connected first segment, middle section and second segment, and the first segment and the second segment are distributed in mirror image
Setting.Needle tip 08 is arranged corresponding to middle section, and direction of the width of the arc strip film from first segment toward second segment gradually becomes smaller
It becomes larger again, the width of the first segment and second segment is respectively greater than the width in the middle section.In the present invention, in identical bulging
Under the action of pressure, middle section is can be improved in the design that the width in the first segment and the second segment toward the middle section is gradually reduced
Deformation quantity cuts film 06 convenient for land 10 and forms vacuum, and the maximum width in the middle section is 5mm hereinafter, preferably 2.4~
2.9mm.Therefore, in order to increase deformation quantity, film 06 is set to the diagonal angle of lid main body 01 by the present invention, and by film 06
The reduced width in middle section designs.
As a kind of preferred embodiment, film 06 and needle can be arranged according to actually required many places in lid main body 01 of the invention
Tip 08, each film 06 be respectively arranged at lid main body 01 week along portion, each needle tip 08 be respectively arranged at film 06 with it is close
Position between envelope portion.Since sealing 02 is in loop-like, the hot drum of 02 pair of lid main body 01 of sealing is swollen, and there is whole constraint to make
With when deformation occurs for lid main body 01, sealing 02 can further increase the cutting force of land 10.
Above-described embodiment and attached drawing and non-limiting product form and style of the invention, any technical field it is common
The appropriate changes or modifications that technical staff does it all should be regarded as not departing from patent category of the invention.
Claims (9)
1. the releasing pressure automatically sealing cover of a kind of food container, including the lid main body by plastic material integrated injection molding machine-shaping
With for the sealing with box body sealing cooperation, the sealing position is in the peripheral side of the lid main body, it is characterised in that: described
The part of lid main body is designed using thinning, and the film being easily broken off when being formed by cutting force, the lid main body removes described thin
The part of film is thin-walled, and the thickness of the thin-walled is greater than the thickness of the film, and the film is located relatively at the walled thickness
Bottom, middle part or top on direction, the thin-walled are equipped at when the lid main body hot drum is swollen certainly in the film week
Dynamic cutting forms pin hole to puncture the film with the needle tip of pressure release, and the film is located at the peripheral part of the lid main body, institute
Needle tip is stated between the film and the sealing.
2. a kind of releasing pressure automatically sealing cover of food container as described in claim 1, it is characterised in that: the sealing
It is equipped with along the side wall extended to form, the upper surface of the needle tip is folded upward to because hot drum is swollen with the week by the lid main body
The needle tip of upward deformation of arching upward applies the reinforcing rib of downward pressure, and the reinforcing rib is fixed on the side wall of the sealing
On.
3. a kind of releasing pressure automatically sealing cover of food container as described in claim 1, it is characterised in that: the needle tip
In sawtooth strip.
4. a kind of releasing pressure automatically sealing cover of food container as claimed in claim 3, it is characterised in that: the needle tip
Including slip and land, the land is located at all edges of the film, and the thickness of the needle tip is from the slip to the tooth
Sword direction gradually becomes smaller.
5. a kind of releasing pressure automatically sealing cover of food container according to any one of claims 1-4, it is characterised in that: institute
It states film and needle tip is set to the maximum position of deformation quantity of arching upward when hot drum is swollen in the lid main body.
6. a kind of releasing pressure automatically sealing cover of food container as claimed in claim 5, it is characterised in that: the lid main body
It is square, the film and needle tip are set to the diagonal angle of the lid main body.
7. a kind of releasing pressure automatically sealing cover of food container as claimed in claim 6, it is characterised in that: the film is
Arc strip film, the arc strip film include sequentially connected first segment, middle section and second segment, and the needle tip corresponds in described
Section setting, the width of the arc strip film gradually becomes smaller from the first segment toward the direction of the second segment to be become larger again, institute
The width for stating first segment and second segment is respectively greater than the width in the middle section.
8. a kind of releasing pressure automatically sealing cover of food container as claimed in claim 7, it is characterised in that: the middle section
Maximum width is 5mm or less.
9. a kind of releasing pressure automatically sealing cover of food container as claimed in claim 5, it is characterised in that: the thin-walled
Wall thickness be less than 0.6mm, the film with a thickness of 0.02-0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218229.7A CN109264175A (en) | 2018-10-18 | 2018-10-18 | A kind of releasing pressure automatically sealing cover of food container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811218229.7A CN109264175A (en) | 2018-10-18 | 2018-10-18 | A kind of releasing pressure automatically sealing cover of food container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109264175A true CN109264175A (en) | 2019-01-25 |
Family
ID=65194332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811218229.7A Pending CN109264175A (en) | 2018-10-18 | 2018-10-18 | A kind of releasing pressure automatically sealing cover of food container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109264175A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09221177A (en) * | 1996-02-16 | 1997-08-26 | Dainippon Ink & Chem Inc | Packaging container for cooking by microwave oven |
| JP2000007055A (en) * | 1998-06-18 | 2000-01-11 | Dainippon Printing Co Ltd | Package |
| TWM495854U (en) * | 2014-07-04 | 2015-02-21 | Aromate Ind Co Ltd | Easy-to-break-opening type volatile substance carrying device |
| CN106043963A (en) * | 2015-04-06 | 2016-10-26 | 京洛株式会社 | Container for microwave ovens |
| JP2017024803A (en) * | 2016-10-14 | 2017-02-02 | 福岡丸本株式会社 | Packaging container for microwave oven cooking |
| CN107089438A (en) * | 2017-06-15 | 2017-08-25 | 王艳琴 | It is a kind of have can automatic heating device beverage can |
| JP2017186046A (en) * | 2016-04-06 | 2017-10-12 | 福岡丸本株式会社 | Packaging container for microwave cooking |
| CN206634514U (en) * | 2017-03-17 | 2017-11-14 | 杭州顶正包材有限公司 | It is a kind of can microwave heating exhaust packaging bag |
| CN209160418U (en) * | 2018-10-18 | 2019-07-26 | 泉州梅洋塑胶五金制品有限公司 | A kind of releasing pressure automatically sealing cover of food container |
-
2018
- 2018-10-18 CN CN201811218229.7A patent/CN109264175A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09221177A (en) * | 1996-02-16 | 1997-08-26 | Dainippon Ink & Chem Inc | Packaging container for cooking by microwave oven |
| JP2000007055A (en) * | 1998-06-18 | 2000-01-11 | Dainippon Printing Co Ltd | Package |
| TWM495854U (en) * | 2014-07-04 | 2015-02-21 | Aromate Ind Co Ltd | Easy-to-break-opening type volatile substance carrying device |
| CN106043963A (en) * | 2015-04-06 | 2016-10-26 | 京洛株式会社 | Container for microwave ovens |
| JP2017186046A (en) * | 2016-04-06 | 2017-10-12 | 福岡丸本株式会社 | Packaging container for microwave cooking |
| JP2017024803A (en) * | 2016-10-14 | 2017-02-02 | 福岡丸本株式会社 | Packaging container for microwave oven cooking |
| CN206634514U (en) * | 2017-03-17 | 2017-11-14 | 杭州顶正包材有限公司 | It is a kind of can microwave heating exhaust packaging bag |
| CN107089438A (en) * | 2017-06-15 | 2017-08-25 | 王艳琴 | It is a kind of have can automatic heating device beverage can |
| CN209160418U (en) * | 2018-10-18 | 2019-07-26 | 泉州梅洋塑胶五金制品有限公司 | A kind of releasing pressure automatically sealing cover of food container |
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