JPH01308721A - Vacuum forming and packaging apparatus - Google Patents
Vacuum forming and packaging apparatusInfo
- Publication number
- JPH01308721A JPH01308721A JP13899388A JP13899388A JPH01308721A JP H01308721 A JPH01308721 A JP H01308721A JP 13899388 A JP13899388 A JP 13899388A JP 13899388 A JP13899388 A JP 13899388A JP H01308721 A JPH01308721 A JP H01308721A
- Authority
- JP
- Japan
- Prior art keywords
- bag
- open end
- packaging bag
- clamps
- packaging
- 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
- 238000007666 vacuum forming Methods 0.000 title claims description 8
- 238000009461 vacuum packaging Methods 0.000 title description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 8
- 235000009566 rice Nutrition 0.000 abstract description 8
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 description 9
- 241000209094 Oryza Species 0.000 description 7
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 241000533293 Sesbania emerus Species 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
Landscapes
- Vacuum Packaging (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は米、麦、コーヒー豆などの穀物、及び一般の
粒状物の真空包装（実際は包装体内の気圧が大気圧より
も低い密封脱気包装を意味する）に際して、包装完了後
の外形状を扁平で整ったものにすることのできる真空整
形包装機に関する。[Detailed Description of the Invention] <Industrial Application Field> This invention applies to vacuum packaging of grains such as rice, wheat, and coffee beans, and general granular materials (actually, the air pressure inside the package is lower than atmospheric pressure). This invention relates to a vacuum forming packaging machine that can make the outer shape flat and regular after packaging is completed.
〈従来の技術〉
従来、精白米の袋詰に於いて、袋内の余剰空気を可及的
に少なくすると共に、袋を扁平状に整える技術は既に特
公昭５６−２３８４１号として提案されている。また、
真空包装（実際は０．４〜０．６気圧程度の低気圧包装
である）されたものを、包装完了後に整形する位置も既
に本発明者等によって特願昭６２−１５１００１号とし
て提案されている。<Prior art> Conventionally, in bagging polished rice, a technology has already been proposed in Japanese Patent Publication No. 56-23841 to reduce the amount of excess air inside the bag as much as possible and to flatten the bag. . Also,
The present inventors have already proposed in Japanese Patent Application No. 151001/1983 the position for shaping vacuum packed items (actually low pressure packaging of about 0.4 to 0.6 atmospheres) after packaging is complete. .
〈発明か解決しようとする課題〉
ところが、前記従来の特公昭５６−２３８４１では包装
袋の外面から押圧振動を加えることによって袋内の余剰
空気を排出するだけであるから、包装完了後でも袋内に
は充分な量の空気（特に酸素）が残存しており、被包装
物の保存性を向上させるという点では充分な効果を期待
できない。また、前記特願昭６２−１５１００１では真
空包装の完了したものを、後から扁平整形する方式であ
る為、作業が真空包装と整形との２工程となり、作業能
率の点で充分ではない。<Problem to be solved by the invention> However, in the conventional Japanese Patent Publication No. 56-23841, excess air inside the bag is only exhausted by applying pressure vibration from the outer surface of the packaging bag, so even after packaging is completed, the inside of the bag is Since a sufficient amount of air (particularly oxygen) remains in the container, a sufficient effect cannot be expected in terms of improving the shelf life of the packaged items. Further, in the above-mentioned Japanese Patent Application No. 151001/1984, since the vacuum packaging is completed, the product is flattened afterwards, so the work is two steps, vacuum packaging and shaping, which is not sufficient in terms of work efficiency.
本発明はこのような点を解消して、真空包装と同時に袋
を扁平に且つ、端部にシール装置の跡を残さないように
整形できる真空包装整形機を提供せんとするものである
。SUMMARY OF THE INVENTION The present invention aims to solve these problems and provide a vacuum packaging shaping machine that can flatten a bag at the same time as vacuum packaging and shape the bag without leaving any sealing device marks on the edges.
く課題を解決するための手段〉
本発明の真空包装整形機の技術的手段は、開閉自在な気
密室と、この気密室の空気を吸気して、室内を低気圧状
態にする吸気装置と、気密室内の上下に対面するように
設けられた１対の振動押圧板と、包装袋の開放端を街え
てシールする装置とからなり、前記シール装置は包装袋
の開放端を部分的に衛えるクランプと、包装袋の開放端
を完全に溶着密封する加熱シール部とを有し、且つ、シ
ール装置は包装袋から離れる方向に位置移動自在に設け
られていることにある。Means for Solving the Problems> The technical means of the vacuum packaging forming machine of the present invention includes: an airtight chamber that can be opened and closed; It consists of a pair of vibrating pressing plates arranged vertically facing each other in an airtight chamber, and a device for sealing the open end of the packaging bag, and the sealing device partially protects the open end of the packaging bag. It has a clamp and a heat sealing part that completely seals the open end of the packaging bag by welding, and the sealing device is provided so as to be movable in a direction away from the packaging bag.
また、シール装置は上下２体構成とし、両者をヒンジ止
めして開閉自在にし、更に、上下体の端部にクランプ及
び加熱シール部を設け、また、上下両体をリンク機構に
よって一体的に後退移動させうるようにすることもでき
る。In addition, the sealing device is composed of two parts, the upper and lower parts, which are hinged so that they can be opened and closed freely.Furthermore, a clamp and a heating seal part are provided at the ends of the upper and lower parts, and the upper and lower parts are retracted as one unit by a link mechanism. It can also be made movable.
く作用〉
本発明の真空整形包装機では、気密室を開き、米などの
入った包装袋を下方の板上に載せ、包装袋の開放端をシ
５−ル装置のクランプに衛え込ませる。この時、クラン
プは袋の開放端を部分的に街えるので、袋端の一部には
開放部が残っており、この残存開放部を通って袋内の空
気は自由に流出入可能である。次に気密室を閉じて、吸
気装置を作動させると、気密室内の空気が排出され、室
内は低気圧状態になる。この時、袋内の空気も流出し、
袋内の気圧は室内気圧と同一の低気圧状態となる。この
状態で袋の開放端が完全に加熱シールされる。シールが
完了するとシール装置は袋から離れる。次に上下の振動
押圧板が作動して、包装袋の上下両面から押圧力を加え
ると共に、振動を付与する。この結果、包装袋は扁平状
に整形される。この際、シール装置はすでに後退移動し
て袋から離れているので、整形の邪魔にならず、包装袋
の端にシール装置の跡が残るようなことはない。その後
、気密室内に空気を送って常圧に戻し、室を開けて包装
物を取り出す。Function> In the vacuum forming packaging machine of the present invention, the airtight chamber is opened, the packaging bag containing rice, etc. is placed on the lower plate, and the open end of the packaging bag is held in the clamp of the sealing device. . At this time, since the clamp partially goes around the open end of the bag, an open part remains at the end of the bag, and the air inside the bag can freely flow in and out through this remaining open part. . Next, when the airtight chamber is closed and the intake device is activated, the air inside the airtight chamber is exhausted and the room becomes in a low pressure state. At this time, the air inside the bag also flows out,
The air pressure inside the bag becomes a low pressure state, which is the same as the indoor air pressure. In this state, the open end of the bag is completely heat sealed. Once sealing is complete, the sealing device separates from the bag. Next, the upper and lower vibrating pressing plates are activated to apply pressing force from both the upper and lower surfaces of the packaging bag, as well as to apply vibrations. As a result, the packaging bag is shaped into a flat shape. At this time, since the sealing device has already moved backward and away from the bag, it does not interfere with the shaping, and no marks from the sealing device remain on the edge of the packaging bag. After that, air is sent into the airtight chamber to return it to normal pressure, and the chamber is opened to take out the package.
〈実施例〉
本発明の真空包装整形機の一実施例を図面について説明
する。ｌは機本体、２は上蓋である。上蓋２は機本体ｌ
の台板３にヒンジ４によって取付けられ、手動または自
動で自由に開閉可能である。上蓋２には下面開放の空間
が形成されており、上Ｍ２を台板３上に被せた時には気
密室５が形成されるようになる。台板３の上面には振動
板６が設けられていて、米などの充填された包装袋Ａは
この振動板６上に置かれる。７は包装袋の開放端を衡え
てシールする装置である。８は上面押圧板で、上蓋２内
に昇降自在に取付けられていて、エアシリンダ９によっ
て降下させ、包装袋の上面に押圧力を加える。−１０は
機本体ｌ内に設けられた吸気装置で、上Ｍ２を被せるこ
とによって形成された気密室５から脱気して、室内を真
空（低気圧）にする。<Example> An example of the vacuum packaging forming machine of the present invention will be described with reference to the drawings. 1 is the main body of the machine, and 2 is the upper lid. Upper lid 2 is the main body of the machine
It is attached to a base plate 3 by a hinge 4 and can be opened and closed manually or automatically. A space with an open bottom surface is formed in the upper lid 2, and an airtight chamber 5 is formed when the upper M2 is placed on the base plate 3. A diaphragm 6 is provided on the top surface of the base plate 3, and the packaging bag A filled with rice or the like is placed on this diaphragm 6. 7 is a device for aligning and sealing the open end of the packaging bag. Reference numeral 8 denotes an upper surface pressing plate, which is mounted in the upper lid 2 so as to be able to rise and fall freely, and is lowered by an air cylinder 9 to apply a pressing force to the upper surface of the packaging bag. -10 is an air intake device provided in the machine body 1, which evacuates air from the airtight chamber 5 formed by covering the upper M2 to make the chamber a vacuum (low pressure).
第２図にはシール装置７の詳細な構造が示されている。FIG. 2 shows the detailed structure of the sealing device 7.
シール装置７は上体１１と下体１２とからなり、上体１
１はヒンジ１３によって下体１２に回動自在に取付けら
れている。１４は上体１２を移動させるエアシリンダで
ある。１５．１６は上下体１１．１２の端に取付けられ
たクランプで、上体！１を移動させることによって上下
のクランプは接合・離脱する。このクランプ１５．１６
によって包装袋Ａの開放端を街える。この際、クランプ
では袋の中央部のみを街え、両端に通気可能な開放部を
残すようにする。１７．１８は加熱シール部で、袋の開
放部を完全に溶着密封する。The sealing device 7 consists of an upper body 11 and a lower body 12.
1 is rotatably attached to the lower body 12 by a hinge 13. 14 is an air cylinder that moves the upper body 12. 15.16 are clamps attached to the ends of the upper and lower bodies 11 and 12, and the upper body! By moving 1, the upper and lower clamps are joined and separated. This clamp 15.16
The open end of packaging bag A is moved around. At this time, clamp only the center of the bag, leaving open vents at both ends. Reference numerals 17 and 18 are heat sealing parts that completely weld and seal the open part of the bag.
ｌ９は加熱シール部１７．１８を接合移動させるエアシ
リンダである。下体Ｉ２はリンク２０，２１によって台
板３に取付けられており、エアシリンダ２２によってリ
ンク２０を移動させることにより、下体１２と」二体１
１とは一体となって第４図の状態に後退移動する。19 is an air cylinder for joining and moving the heat sealing parts 17 and 18. The lower body I2 is attached to the base plate 3 by links 20 and 21, and by moving the link 20 with an air cylinder 22, the lower body 12 and the two bodies 1
1 and moves backward to the state shown in FIG.
次に前記真空整形包装機の作動について説明する。上蓋
２を開け、振動板６上に米の入った包装袋Ａを載置する
。この包装袋Ａはチューブ状のプラスチックフィルムな
どを適当長に切断し、片端ヲ予じめシールし、他端は開
放状のままのものであり、この包装袋Δ内には計量され
た精白米などが収容されている。従って、包装袋Ａを載
置する時には、内部の米がこぼれないように行い、次に
その開放端を第２図のようにクランプ１５．１６の間に
挿入する。シリンダ１４を作動させて上体１１を閉じる
と、包装袋Ａの開放端はクランプ１５．１６によって第
３図のように衡えられる。ただし、クランプ１５．１６
によって街えるのは開放端の中央部のみであり、両端部
は解放されたままであるから、この部分を通って空気は
自由に流通できる。次に上１ｉ２を下ろして閉めると、
機密状態の室５が形成される。吸気装置１０を作動させ
て、気密室５内から脱気し、室内の気圧を低下させる。Next, the operation of the vacuum forming packaging machine will be explained. Open the top lid 2 and place the packaging bag A containing rice on the diaphragm 6. This packaging bag A is made by cutting a tube-shaped plastic film or the like into an appropriate length, sealing one end in advance, and leaving the other end open. etc. are accommodated. Therefore, when placing the packaging bag A, do so so that the rice inside does not spill out, and then insert its open end between the clamps 15 and 16 as shown in FIG. When the cylinder 14 is actuated to close the upper body 11, the open end of the packaging bag A is held by the clamps 15, 16 as shown in FIG. However, clamp 15.16
Only the central part of the open end is open; both ends remain open, allowing air to flow freely through this part. Next, lower the top 1i2 and close it,
A confidential chamber 5 is formed. The air intake device 10 is operated to remove air from the airtight chamber 5, thereby lowering the atmospheric pressure in the room.
この際、包装袋Ａの空気も残存開放部から抜は出て、袋
内の気圧は室内と同じ低気圧状になる。なお、この脱気
作業と同時に、振動板６を作動させて、袋の形状をある
程度整えるようにする。ただし、この仮整形はかならず
しも行わなくてよい。脱気が完了すると、シリンダ１９
を作動させて、加熱シール部１．７．１８を接合させ、
包装袋Ａの開放端を完全に溶着シールして、袋を気密状
態にする。次に第４図のように上体１１を上方に開放移
動させると共に、シリンダ２２を作動させて上下両体Ｉ
１．１２を後退移動させる。そして、シリンダ９を作動
させて押圧板８を降下させると共に、振動板６を振動作
動させ、包装袋Ａを上下両面から加振押圧して、扁平状
に形を整える。この際、クランプ１５．１６は既に後退
していて整形の邪魔をしないので、包装袋は端部までき
れいに整形され、クランプ１５．１６を元位置に残した
ままで整形した時に生ずるような袋端のクランプ跡は発
生しない。次に外気を気密室５内に導入し、室内が常圧
に戻った後に上蓋２を開け、包装袋Ａを取り出す。At this time, the air in the packaging bag A is also extracted from the remaining open portion, and the air pressure inside the bag becomes the same low pressure as in the room. At the same time as this degassing operation, the diaphragm 6 is operated to adjust the shape of the bag to some extent. However, this temporary shaping does not necessarily have to be performed. When degassing is completed, cylinder 19
to join the heated seal part 1.7.18,
The open end of packaging bag A is completely welded and sealed to make the bag airtight. Next, as shown in FIG. 4, the upper body 11 is opened and moved upward, and the cylinder 22 is operated to
1. Move 12 backwards. Then, the cylinder 9 is actuated to lower the pressing plate 8, and the diaphragm 6 is vibrated to vibrate and press the packaging bag A from both the upper and lower surfaces to shape it into a flat shape. At this time, the clamps 15 and 16 have already been retracted and do not interfere with the shaping, so the packaging bag is neatly shaped to the edges, and the edges of the bag are not shaped as they would be if the clamps 15 and 16 were left in their original positions. No clamp marks occur. Next, outside air is introduced into the airtight chamber 5, and after the pressure inside the chamber returns to normal pressure, the upper lid 2 is opened and the packaging bag A is taken out.
なお、本発明に於いて、気密室５の形成手段は実施例の
上蓋２と台板３とによるものに限定されず、他の気密室
形成手段を自由に採用することができる。また、上下の
振動押圧板の構造、あるいはシール装＠７の構造やその
後退方式なども実施例に限定されず、自由である。In the present invention, the means for forming the airtight chamber 5 is not limited to the upper lid 2 and the base plate 3 of the embodiment, and other airtight chamber forming means can be freely employed. Furthermore, the structure of the upper and lower vibrating press plates, the structure of the sealing device @7, and its retraction method are not limited to the embodiments, and are free.
〈発明の効果〉
本発明の真空整形包装機では、片端開放の包装袋に計量
した米などを入れ、この片端開放状態の包装袋のままで
機にセットし、袋内からの脱気と、開放端の加熱シール
、及び扁平状への整形を一挙に行うことができるので、
包装作業を非常に能率よく行うことができる。また、シ
ール装置が整形作動時に袋から離れるので、整形後の包
装袋の端にシール装置の跡が残ることはなく、きれいな
包装物を得ることができる。<Effects of the Invention> In the vacuum forming packaging machine of the present invention, weighed rice, etc. is placed in a packaging bag with one end open, and this packaging bag with one end open is set in the machine, and air is removed from inside the bag. Heat-sealing the open end and shaping it into a flat shape can be done all at once.
Packaging work can be done very efficiently. Further, since the sealing device is separated from the bag during the shaping operation, no traces of the sealing device remain on the edges of the packaging bag after shaping, and a clean package can be obtained.
請求項２のものでは、ソール装置の構造や作動が簡単と
なり、製造コストの低廉化や作動の確実性を得ることが
できる。According to the second aspect of the present invention, the structure and operation of the sole device are simplified, and manufacturing costs can be reduced and operation can be ensured.
図面は本発明の真空整形包装機の実施例を示し、第１図
は一部断面の側面図、第２〜４図はシール装置の作動を
示す拡大図である。
！・・機本体、２・・・上蓋、３・・・台板、４・・・
ヒンジ、５・・・気密室、６・・・振動板、７・・・シ
ール装置、８・・・押圧板、９・・・エアシリンダ、１
ｏ・・・吸気装置、ＩＩ・・・上体、１２・・・下体、
１３・・・ヒンジ、１４・・・エアシリンダ、１５．１
６・・・クランプ、１７．１８・・・加熱シール部、Ｉ
９・・・エアシリンダ、２０゜２１・・・リンク、２２
川エアシリンダ。
特許出願人 株式会社東洋精米機製作所代理人 竹
１） 明 弘
第４図
第２図
′ 第３図The drawings show an embodiment of the vacuum forming packaging machine of the present invention, with FIG. 1 being a partially sectional side view, and FIGS. 2 to 4 being enlarged views showing the operation of the sealing device. ! ...Machine body, 2...Top lid, 3...Base plate, 4...
Hinge, 5... Airtight chamber, 6... Vibration plate, 7... Sealing device, 8... Pressing plate, 9... Air cylinder, 1
o... Intake device, II... Upper body, 12... Lower body,
13... Hinge, 14... Air cylinder, 15.1
6... Clamp, 17.18... Heat sealing part, I
9... Air cylinder, 20° 21... Link, 22
River air cylinder. Patent applicant: Toyo Rice Mill Co., Ltd. Agent: Bamboo
1) Akihiro Figure 4 Figure 2' Figure 3
Claims (1)
、室内を低気圧状態にする吸気装置と、気密室内の上下
に対面するように設けられた１対の振動押圧板と、包装
袋の開放端を銜えてシールする装置とからなり、前記シ
ール装置は包装袋の開放端を部分的に銜えるクランプと
、包装袋の開放端を完全に溶着密封する加熱シール部と
を有し、且つ、シール装置は包装袋から離れる方向に位
置移動自在に設けられている真空整形包装機。 ２、シール装置７は上体１１と下体１２とから成り、上
体１１と下体１２とはその一端でヒンジ１３連結されて
おり、上体１１と下体１２との他端には、包装袋の開放
端の一部を銜えるクランプ１５、１６及び開放端を溶着
密封する加熱シール部１７、１８が設けられ、更に上体
１１と下体１２とはリンク２０、２１によって包装袋か
ら離れる方向に後退移動自在に設けられている請求項１
記載の真空整形包装機。[Claims] 1. An airtight chamber that can be opened and closed, an intake device that takes in air from the airtight chamber to bring the room into a low-pressure state, and a pair of airtight chambers disposed facing each other at the top and bottom of the airtight chamber. It consists of a vibrating pressing plate, a device that grips and seals the open end of the packaging bag, and the sealing device includes a clamp that partially grips the open end of the packaging bag, and a clamp that completely seals the open end of the packaging bag by welding. 1. A vacuum forming packaging machine having a heating sealing section, and a sealing device provided so as to be movable in a direction away from a packaging bag. 2. The sealing device 7 consists of an upper body 11 and a lower body 12. The upper body 11 and the lower body 12 are connected at one end by a hinge 13, and the other end of the upper body 11 and the lower body 12 is connected to a packaging bag. Clamps 15 and 16 that grip a part of the open end and heat seal parts 17 and 18 that weld and seal the open end are provided, and the upper body 11 and lower body 12 are further retracted in the direction away from the packaging bag by links 20 and 21. Claim 1: The device is movably provided.
The vacuum forming packaging machine described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13899388A JPH01308721A (en) | 1988-06-06 | 1988-06-06 | Vacuum forming and packaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13899388A JPH01308721A (en) | 1988-06-06 | 1988-06-06 | Vacuum forming and packaging apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01308721A true JPH01308721A (en) | 1989-12-13 |
Family
ID=15234977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13899388A Pending JPH01308721A (en) | 1988-06-06 | 1988-06-06 | Vacuum forming and packaging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01308721A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268768A (en) * | 2006-03-30 | 2007-10-18 | Sumitomo Osaka Cement Co Ltd | Hydraulic material packaging molded article and its manufacturing method |
| CN105475466A (en) * | 2015-12-13 | 2016-04-13 | 重庆果然好农业开发有限公司 | Nitrogen preservation method |
| CN106864815A (en) * | 2015-12-13 | 2017-06-20 | 重庆果然好农业开发有限公司 | Method for refreshing agricultural products |
| CN110104253A (en) * | 2019-04-22 | 2019-08-09 | 平湖市聚顶包装有限公司 | A kind of vacuum packaging equipment |
-
1988
- 1988-06-06 JP JP13899388A patent/JPH01308721A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268768A (en) * | 2006-03-30 | 2007-10-18 | Sumitomo Osaka Cement Co Ltd | Hydraulic material packaging molded article and its manufacturing method |
| CN105475466A (en) * | 2015-12-13 | 2016-04-13 | 重庆果然好农业开发有限公司 | Nitrogen preservation method |
| CN106864815A (en) * | 2015-12-13 | 2017-06-20 | 重庆果然好农业开发有限公司 | Method for refreshing agricultural products |
| CN110104253A (en) * | 2019-04-22 | 2019-08-09 | 平湖市聚顶包装有限公司 | A kind of vacuum packaging equipment |
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