CN102548858B - Check valve, sealing bag, and production method for both - Google Patents

Check valve, sealing bag, and production method for both Download PDF

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Publication number
CN102548858B
CN102548858B CN2010800455628A CN201080045562A CN102548858B CN 102548858 B CN102548858 B CN 102548858B CN 2010800455628 A CN2010800455628 A CN 2010800455628A CN 201080045562 A CN201080045562 A CN 201080045562A CN 102548858 B CN102548858 B CN 102548858B
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CN
China
Prior art keywords
thin slice
check valve
boiler check
valve body
bag
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Application number
CN2010800455628A
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Chinese (zh)
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CN102548858A (en
Inventor
田中干雄
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Assist Ltd.
Tanaka Ltd
MK Technology KK
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ASSIST Ltd
Tanaka Ltd
MK Technology KK
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Publication of CN102548858A publication Critical patent/CN102548858A/en
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    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/147—Valve bags, i.e. with valves for filling the filling port being provided in a side wall
    • 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
    • B65D81/18—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 providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2038—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum with means for establishing or improving vacuum
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve
    • Y10T137/788—Having expansible port
    • Y10T137/7881—Apertured plate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making

Abstract

Disclosed is a check valve that has a high certainty of checking effectiveness and in which production costs have been kept as low as possible. Also disclosed is a sealing bag. A check valve (V) is provided with flexible resin base sheets (31, 32) and a plurality of valve body sheets (4). In the valve body sheets (4), at least an upstream valve body sheet (4a) and a downstream valve body sheet (4b) are formed as a set and adhered to one of the base sheets (31). The abovementioned upstream valve body sheet (4a) is adhered to the abovementioned base sheet (31) at the upstream end (4a1), while the downstream end (4a2) is capable of moving in relation to the abovementioned base sheets (31, 32). The abovementioned downstream valve body sheet (4b) is adhered at the downstream end (4b2), while the upstream end (4b1) is capable of moving in relation to the abovementioned base sheets (31, 32). In the abovementioned valve body sheets (4a, 4b), the ends (4a2, 4b1) that are capable of moving in relation to the abovementioned base sheets (31, 32) are capable of coming in contact with the other base sheet (32).

Description

Boiler check valve and sealing bag with and manufacture method
Technical field
The present invention relates to boiler check valve, have the sealing bag of this boiler check valve, the manufacture method of this boiler check valve and the manufacture method of sealing bag.
Background technology
At present, has the sealing bag that the article storing portion airtight conditions ground of taking in the space of article such as clothes or food can be sealed.For all gases such as air that will be present in article storing portion are discharged and are kept this state, sealing bag to use the boiler check valve of ventilative ground attachment collecting bag and bag outside to bag is outside.
This boiler check valve is that air-flow passes through the space by the space of passing through that opens and closes gas when discharging above-mentioned gas, can allow the air-flow of a direction to pass through, and blocks the air-flow of another direction.
Existing example as this boiler check valve has patent documentation 1 described boiler check valve.As shown in figure 10, this boiler check valve 100 is on rectangular plastic sheeting 101, make filtration membrane 102 shorter than it but that width is identical overlapping with each lower edge, make the upper edge of plastic sheeting 103,104 lower edge and filtration membrane 102 overlapping, and then it is overlapping with the one side of plastic sheeting 101, after forming flat layered product, its both sides of the edge of caking and lower edge.And, overlapping 100a of the upper edge of caking filtration membrane 102 and plastic sheeting 103,104 lower edge, has peristome 106 in the upper end, have the filtering surface 107 that is formed by filtration membrane 102 in the following one side of quadrate part, and plastic sheeting 103 between form gas discharge stream 108.And, form non-return sheet 103a with plastic sheeting 103, its work bag portion 109 is set, the medial surface of medial surface or boiler check valve 103 coating low viscosity (LV) inert fluid above plastic sheeting 101, the tight joint of maintenance pellicular front.
Patent documentation 1: Japanese kokai publication hei 9-112721 communique
But 100 on the boiler check valve of above-mentioned existing example arranges a non-return sheet 103a, blocks inverted draft by plastic sheeting 101 and the tight joint of non-return sheet 103a.That is, only form above-mentioned tight joint at a place, the non-return effect lacks reliability.Therefore, in the invention of patent documentation 1, must apply the low viscosity (LV) inert fluid in order to improve the non-return effect.
In addition, when above-mentioned technology is improved, must form the structure that does not increase the boiler check valve manufacturing cost as far as possible certainly.
In addition, as the desirable function of boiler check valve, the air pressure that for example as far as possible reduces in the beginning exhaust sealing bag of moment is " initial pressure ".This is because if " initial pressure " height then might be difficult to begin exhaust, must apply big external force to sealing bag, perhaps remains in the bag owing to gas is difficult to discharge, and sealing bag can expand inexquisitely.
The present invention in view of the above problems, purpose provides the reliability that improves the non-return effect, reduces the little boiler check valve of manufacturing cost and " initial pressure " and have the manufacture method of sealing bag and this boiler check valve and the sealing bag of this boiler check valve as far as possible.
Summary of the invention
In order to address the above problem, technical scheme 1 described invention of the present invention is,
A kind of boiler check valve, overlapping multiple sheet forms, forming the space that gas is passed through between above-mentioned thin slice is that air-flow passes through space 3a, by opening and closing this air-flow by space 3a, can allow the air-flow of the positive dirction from inflow entrance to flow export to pass through, block the reverse air-flow from flow export to inflow entrance
It is characterized in that having the basic thin slice 31,32 and the valve body thin slice 4 of the softness of many resin materials of many resin materials,
Above-mentioned many basic thin slices 31,32 arrange opposite to each other in table back of the body direction,
In above-mentioned many valve body thin slices 4, be baseline configuration at the upstream side valve body thin slice 4a of upstream side and at least two of downstream valve body thin slice 4b that are configured in the downstream with the air flow line of positive dirction be one group,
It is all bonding with at least one side's side group plinth thin slice 31 to form above-mentioned one group each valve body thin slice 4a, 4b,
Air flow line when making the above-mentioned relatively discharge of above-mentioned each valve body thin slice 4a, 4b become series connection and both sides do not form overlappingly in table back of the body direction above-mentioned bonding,
The upstream extremity 4a1 side that is bonded in of above-mentioned upstream side valve body thin slice 4a and above-mentioned side's side group plinth thin slice 31 forms, and downstream end 4a2 side can move relative to above-mentioned basic thin slice 31,32,
The above-mentioned downstream end 4b2 side that is bonded in of above-mentioned downstream valve body thin slice 4b forms, and upstream extremity 4b1 side can move relative to above-mentioned side's side group plinth thin slice 31,
Above-mentioned one group valve body thin slice 4a, at least a portion of 4b, with respect to the opposing party's side group plinth thin slice 32 or with respect to the thin slice that above-mentioned a group valve body thin slice 4a, 4b are configured in the opposition side of above-mentioned side's side group plinth thin slice 31 that clips as the valve body thin slice 91 that is different from above-mentioned a group valve body thin slice 4a, 4b, but tight joint and separable, thereby allow the air-flow of positive dirction to pass through, block reverse air-flow.
The invention of technical scheme 2 of the present invention provides technical scheme 1 described boiler check valve, it is characterized in that, the air-flow with permeability to air that the part formation of above-mentioned side's side group plinth thin slice 31 makes the air-flow of above-mentioned positive dirction pass through in table back of the body direction passes through the 31a of portion,
Said flow is that the air-flow of positive dirction flows into the above-mentioned inflow entrance in the boiler check valve by the 31a of portion,
Said flow is configured in above-mentioned side's side group plinth thin slice 31, carries on the back the upstream side of direction consistent location at table with the upstream extremity 4a1 of above-mentioned upstream side valve body thin slice 4a by the 31a of portion.
The invention of technical scheme 3 of the present invention provides technical scheme 2 described boiler check valve, it is characterized in that, above-mentioned side's side group plinth thin slice 31 is formed by the 31a of portion and other parts by said flow, and these other parts have air-tightness.
The invention of technical scheme 4 of the present invention provides technical scheme 1 described boiler check valve, it is characterized in that, the above-mentioned flow export 32b that the air-flow that outer thin slice 32 sides of above-mentioned the opposing party's side have a positive dirction flows out in the boiler check valve,
Above-mentioned flow export 32b forms less than the outer thin slice 31 of above-mentioned side's side by making the outer thin slice 32 of above-mentioned the opposing party's side, perhaps forms by at the outer thin slice 32 of the opposing party's side opening being set,
Above-mentioned flow export 32b is configured in above-mentioned side's side group plinth thin slice 31, with the downstream end 4a2 of the above-mentioned upstream side valve body thin slice 4a downstream in table back of the body direction consistent location.
The invention of technical scheme 5 of the present invention provides technical scheme 4 described boiler check valve, it is characterized in that, forms crooked strip of paper used for sealing s4, s5 between above-mentioned inflow entrance 31a and above-mentioned inflow entrance 31a,
Above-mentioned crooked strip of paper used for sealing s4, s5 carry on the back the bonding above-mentioned side's side group plinth thin slice 31 of direction, above-mentioned valve body thin slice 4 and above-mentioned the opposing party's side group plinth thin slice 32 at table,
Above-mentioned crooked strip of paper used for sealing s4, s5 carry out bending, and the stream in the feasible boiler check valve V from above-mentioned inflow entrance 31a to above-mentioned inflow entrance 31a forms flexuose stream the birds-eye view of thin slice.
The invention of technical scheme 6 of the present invention provides technical scheme 5 described boiler check valve, it is characterized in that, in the stream by above-mentioned crooked strip of paper used for sealing s4, s5 regulation, between above-mentioned valve body thin slice 4 and above-mentioned the opposing party's side group plinth thin slice 32, inert substances 8 such as configuration liquid-state silicon.
The invention of technical scheme 7 of the present invention provides technical scheme 1 described boiler check valve, it is characterized in that, above-mentioned side's side group plinth thin slice 31 has permeability to air at whole,
Have air-flow that air-flow that a part in side's side group plinth thin slice 31 of this permeability to air forms above-mentioned positive dirction passes through in table back of the body direction by the 31a of portion,
This air-flow by the 31a of portion be in above-mentioned side's side group plinth thin slice 31, with the upstream extremity 4a1 of the above-mentioned upstream side valve body thin slice 4a part at the upstream side of table back of the body direction consistent location.
The invention of technical scheme 8 of the present invention provides technical scheme 2 described boiler check valve, it is characterized in that, the said flow of above-mentioned side's side group plinth thin slice 31 is nonwoven fabrics by the 31a of portion.
The invention of technical scheme 9 of the present invention provides technical scheme 1 described boiler check valve, it is characterized in that, above-mentioned side's side group plinth thin slice 31 is formed by the nonwoven fabrics that has permeability to air at whole,
Have air-flow that air-flow that a part in side's side group plinth thin slice 31 of this permeability to air forms above-mentioned positive dirction passes through in table back of the body direction by the 31a of portion,
Said flow covers with thin slice 92 with having bubble-tight coating by the part beyond the 31a of portion in above-mentioned side's side group plinth thin slice 31.
The invention of technical scheme 10 of the present invention provides technical scheme 1 described boiler check valve, it is characterized in that, be installed on the sealing bag 1 with article storing portion 2 and use, for to the outside gas that is present in above-mentioned article storing portion 2 of discharging of bag, can be breathed freely in article storing portion 2 and a bag outside.
The invention of technical scheme 11 of the present invention provides a kind of sealing bag, and sealing bag 1 has been installed technical scheme 4 described boiler check valve V,
It is characterized in that sealing bag 1 has the bag thin slice 11,12 of soft resin material,
By bonding above-mentioned bag thin slice 11,12, except article storing mouth 1a with installed the part of above-mentioned boiler check valve V, separate airtightly outward with bag,
The entire circumference of above-mentioned boiler check valve V and above-mentioned bag thin slice 11,12 inboard or outer side bonds.
The invention of technical scheme 12 of the present invention provides a kind of sealing bag, and sealing bag 1 has been installed technical scheme 7 described boiler check valve V,
It is characterized in that sealing bag 1 has the bag thin slice 11,12 of soft resin material, by bonding above-mentioned bag thin slice 11,12, except article storing mouth 1a with installed the part of above-mentioned boiler check valve V, separate airtightly outward with bag,
Above-mentioned boiler check valve V is clipped by above-mentioned bag thin slice 11,12, and the air flow line when discharging is that the upstream extremity of benchmark is positioned at above-mentioned article storing portion 2, and downstream end is positioned at outside the above-mentioned article storing portion 2,
The part that upstream in the opposing party's side group plinth thin slice 32 of above-mentioned boiler check valve V is distolateral and bonding with the inner face of above-mentioned the opposing party's side group plinth thin slice 32 opposite sides in above-mentioned bag thin slice 11,12,
Air-flow in side's side group plinth thin slice 31 of above-mentioned boiler check valve V exposes with respect to the space of the article taken in the above-mentioned article storing portion 2 by the 31a of portion,
Form transverse seal 13 by bonding above-mentioned bag thin slice 11,12,
This transverse seal 13 is laterally being crossed the formation of above-mentioned boiler check valve V ground,
In addition, form vertical strip of paper used for sealing 14 by bonding above-mentioned bag thin slice 11,12,
This vertical strip of paper used for sealing 14 is the directions that intersect with above-mentioned transverse seal 13, and the air flow line during with the discharge in the above-mentioned boiler check valve V to be benchmark extend to the upstream side of this transverse seal 13,
14 two on above-mentioned vertical strip of paper used for sealing is that one group of ground forms, and clips above-mentioned boiler check valve V, the wideer interval of width dimensions of this boiler check valve of splitting ratio V,
The upstream extremity 141 of this vertical strip of paper used for sealing 14, compare air-flow at above-mentioned side's side group plinth thin slice 31 by the 31a of portion in by above-mentioned transverse seal 13 regulations, the lower end 31a1 of the part passed through of air in fact, the air flow line during with the discharge in the above-mentioned boiler check valve V is that benchmark is positioned at upstream side.
Technical scheme 13 described inventions of the present invention provide a kind of manufacture method of technical scheme 1 described boiler check valve, it is characterized in that,
Above-mentioned basic thin slice 31,32 and valve body thin slice 4 use the long size thin slice that is supplied to continuously vertically,
Constitute above-mentioned one group each valve body thin slice 4a, 4b and supplied with by a long size thin slice, laterally be cut into two then, overlapping with above-mentioned side's side group plinth thin slice 31 afterwards.
Technical scheme 12 described inventions of the present invention provide a kind of manufacture method of sealing bag, and sealing bag 1 has been installed boiler check valve V,
Above-mentioned boiler check valve V has the basic thin slice 31 of soft resin material, 32 and a plurality of valve body thin slice 4, above-mentioned basic thin slice 31, side's side group plinth thin slice 31 in 32 has permeability to air at whole, above-mentioned basic thin slice 31,32 carry on the back direction at table arranges opposite to each other, in above-mentioned many valve body thin slices 4, air flow line during with discharge is that baseline configuration is one group at the upstream side valve body thin slice 4a of upstream side and at least two of the downstream valve body thin slice 4b that is configured in the downstream, constitute each above-mentioned one group valve body thin slice 4a, 4b is bonding with respect to above-mentioned at least side's side group plinth thin slice 31, make above-mentioned each valve body thin slice 4a, 4b does not form above-mentioned bonding with respect to the air flow line series connection and the both sides that state when discharging in table back of the body direction overlappingly, above-mentioned upstream side valve body thin slice 4a forms with respect to the upstream extremity 4a1 side that is bonded in of above-mentioned side's side group plinth thin slice 31, downstream end 4a2 side can above-mentioned relatively basic thin slice 31,32 move, the above-mentioned downstream end 4ba side that is bonded in of above-mentioned downstream valve body thin slice 4b forms, upstream extremity 4b1 side can above-mentioned relatively basic thin slice 31,32 move, at above-mentioned each valve body thin slice 4a, among the 4b, can above-mentioned relatively basic thin slice 31, each end 4a2 of 32 those sides that move, 4b1 is the opposing party's side group plinth thin slice 32 tight joint relatively, perhaps can be relatively with above-mentioned opposite side basis thin slice 32 bonding be different from valve body sheet 4 tight joint that constitute above-mentioned one group thin slice
It is characterized in that that bag thin slice 11,12 uses is that the resin material by softness forms, at vertical long size thin slice that is supplied to continuously,
Have: to the operation that sandwiches above-mentioned boiler check valve V between above-mentioned each bag thin slice 11,12;
By bonding above-mentioned bag thin slice 11,12 in the operation of laterally crossing above-mentioned boiler check valve V ground formation transverse seal 13; With
By the operation of bonding above-mentioned band thin slice 11, the vertical strip of paper used for sealing 14 of 12 formation,
The direction of vertical strip of paper used for sealing of in above-mentioned operation, forming 14 for intersecting with above-mentioned transverse seal 13, and the air flow line during with the discharge in the above-mentioned boiler check valve V to be benchmark extend to the upstream side of this transverse seal 13,
In addition, 14 two on above-mentioned vertical strip of paper used for sealing is that one group of ground forms, and clips above-mentioned boiler check valve V, the wideer interval of width dimensions of this boiler check valve of splitting ratio V,
The upstream extremity 141 of this vertical strip of paper used for sealing 14, compare air-flow at above-mentioned side's side group plinth thin slice 31 by the 31a of portion in by above-mentioned transverse seal 13 regulations, the lower end 31a1 of the part passed through of air in fact, the air flow line during with the discharge in the above-mentioned boiler check valve V is that benchmark is positioned at upstream side.
The effect of invention
The present invention can provide the reliability of raising non-return effect, reduces the little boiler check valve of manufacturing cost and " initial pressure " as far as possible and have the manufacture method of sealing bag and this boiler check valve and the sealing bag of this boiler check valve.
Description of drawings
Fig. 1 is the example of boiler check valve of expression embodiments of the present invention, (A) is birds-eye view, (B) be in (A) X-X to looking end view drawing, (C) be upward view.
Fig. 2 is the relation of the opposing party's side group plinth thin slice and each valve body thin slice on the boiler check valve of this example of expression, has shown the skeleton diagram at main position, the state when the expression closed gas flow passes through the space turgidly.
Fig. 3 (A) is the birds-eye view of the sealing bag of this example, (B) is the birds-eye view at main position that is illustrated in the example of the shape that has changed vertical strip of paper used for sealing in the sealing bag of this example.
Fig. 4 is the sealing bag of this example, the skeleton diagram of the cross-sectional plane of the dead end shape portion when being exhaust.
Fig. 5 is the skeleton diagram of state that the boiler check valve of above-mentioned example has been installed at the sealing bag of other embodiment of the present invention, (A) be the block diagram of the rear side of bag, (B) being longitudinal section on the check valve location of bag rear side, (C) is that the Y-Y of (B) of bag rear side is to the locational cross sectional drawing of looking.
Fig. 6 (A) is the front elevation of the sealing bag of other embodiment of the present invention, is the front elevation of the sealing bag of other embodiment of the present invention (B), (C) is the central longitudinal section drawing of the sealing bag of (B).
Fig. 7 (A) is the section drawing of the boiler check valve of other embodiment of the present invention, (B) be the birds-eye view of this boiler check valve, (C) be the upward view of this boiler check valve, (D) be the structure instruction diagram of representing this boiler check valve is installed in the state of sealing bag inside, (E) be the structure instruction diagram that this boiler check valve is installed in the state of sealing bag outside.
Fig. 8 (A) is the birds-eye view of the boiler check valve of other embodiment of the present invention, (B) be the upward view of this boiler check valve, (C) be the section drawing of this boiler check valve, (D) be the structure instruction diagram of representing this boiler check valve is installed in the state of sealing bag inside, (E) be the boiler check valve section drawing of other embodiment.
Fig. 9 (A) is the section drawing of the boiler check valve of other embodiment, (B) is the section drawing of the boiler check valve of other embodiment.
Figure 10 is the longitudinal section along the longitudinal of the boiler check valve of existing example.
The specific embodiment
Below describe based on the example of accompanying drawing with regard to embodiments of the present invention.
In addition, the description of expression position such as " table, the back of the body " described in claims of the present invention or the specification sheets, " upper and lower, left and right ", " longitudinal and transverse ", " side, the opposing party " or direction all is for convenience of description or when specific and use, and the applicant does not limit the present invention to the intention of the form that illustrated position concerns.
In addition, the description in " upstream, downstream " is to be benchmark with positive dirction (along the discharging longitudinally of boiler check valve V time air flow line).
The sealing bag 1 of present embodiment can be used as the degassing bag use that can discharge the gas that is present in article storing portion 2 and reduce volume.As the concrete purposes of this degassing bag, enumerate in order to discharge the air that is present in article storing portion 2 and use, preserve the compressed bag (can reduce capacity by reducing the interior air of bag) that doggie bag (preserving to bring into play fresh-keeping effect by the air that reduces in the bag) that food uses or clothes are used.In addition, thus also can be used as article storing portion 2 take in generation such as coffee bean or laundry soap powder gas for example article, discharge gas that these article produce and can be used as and suppress the bag that bag expands and implemented to bag is outside.
As mentioned above, for to the outside gas that is present in article storing portion 2 of discharging of bag, the boiler check valve V that can make article storing portion 2 and the outside ventilation of bag is installed at sealing bag 1.In this example, a sealing bag 1 is provided with a boiler check valve V, but is not limited thereto, and also can a plurality of boiler check valve V be set at a sealing bag 1.
Shown in Fig. 3 (A), the resin material that this routine sealing bag 1 has by softness forms, carries on the back the stacked surperficial side pocket thin slice 11 of direction and back side side pocket thin slice 12 at table, be bonded to each other (heat-sealing) by these bags thin slice 11,12, all completely cut off airtightly with the bag outside except article storing mouth 1a with the part of boiler check valve V has been installed.Boiler check valve V is installed on above-mentioned each bag thin slice 11,12 in table back of the body direction with being clipped.In addition, also can make boiler check valve V to be clipped by a side bag thin slice in each bag thin slice 11,12 by with the side in the bag 11,12 turnover etc.In addition, in this example, bag thin slice 11, the 12nd, overlook into the thin slice of rectangular two identical shaped resin materials in the overlapping form of table back of the body direction, but also can be the bag that the crotch sheet is set in the side, can also be except rectangular other shape.In addition, at article storing mouth 1a the chuck of well-known structure, switch airtightly are set.But if take in the bag of coffee bean or by sealing the sealing bag that final bonding article storing mouth 1a carries out sealing means, then do not need like this can switch chuck.
Boiler check valve V is when discharging gases in the article storing portion 2 from sealing bag 1, is that air-flow passes through space 3a by opening, close the space that this gas passes through, thereby can allows the air-flow of positive dirction to pass through, and blocks the air-flow that sucks direction.
As Fig. 1 (A) (C) shown in, the shape of overlooking (looking up) of the boiler check valve V that this is routine is length side's phase size oblong longer than Width size, said flow is vertically being passed through.
This boiler check valve V has side's side group plinth thin slice 31 and the opposing party's side group plinth thin slice 32 and a plurality of valve body thin slice 4 of soft resin material.
Above-mentioned basic thin slice 31,32 uses the identical resin material thin slice of width dimensions, arranges opposite to each other in table back of the body direction.About lengthwise dimension, side's side group plinth thin slice 31 is than the opposing party's side group plinth thin slice 32 longer (afterwards its effect and effect will be described).And, these basic thin slices 31, the alignment of 32 upstream side (left end side of Fig. 1), overlapping in table back of the body direction.
Valve body thin slice 4 by each basic thin slice 31,32 be clipped in the middle ground overlapping.And bonding (heat-sealing) each basic thin slice 31,32 horizontal limit, two ends and upstream side end edge, sealing airtightly longitudinally.To basic thin slice 31,32 and either party of valve body thin slice 4 also carry out the bonding of above-mentioned horizontal limit, two ends.As described later, in this example, because side's side group plinth thin slice 31 has used nonwoven fabrics, therefore, the air-flow that the air flow inlet on this boiler check valve V becomes on side's side group plinth thin slice 31 passes through the 31a of portion (aftermentioned).The preferred one side of this nonwoven fabrics makes the fusion of thermoplasticity Polymer discharge the material of spun-bonded non-woven fabrics that one side forms etc., no fine hair and fastness to water or good endurance with continuous long fibre shape.In addition, by using the long fibre of core sheath structure, namely this core sheath structure uses the fiber that polyester etc. has intensity in inside, externally uses the soft polyethylene that waits processing that also can seal, thereby also can reach intensity and processability simultaneously.This air-flow is that the positive dirction air-flow flows into the inflow entrance 31a in the boiler check valve V by the 31a of portion.On the other hand, the positive dirction air-flow then becomes boiler check valve V end of downstream side (being between the end limit and side's side group plinth thin slice 31 of the opposing party's side group plinth thin slice 32 strictly speaking) longitudinally from the flow export 32b that boiler check valve V flows out.
In addition, in this example, shown in Fig. 1 (C), form seal point 5 in the lateral center of boiler check valve V, bonding basic thin slice 31,32 and valve body thin slice 4.In this example, 5 conducts of sealing point form in the short heat-sealing of the longitudinal extension of boiler check valve V.Though sealing point 5 arranges for the air-flow when discharging carries out rectification, in the present invention not necessarily, also can not form.
In above-mentioned a plurality of valve body thin slices 4, being configured in the upstream side valve body thin slice 4a of upstream side and at least two of the downstream valve body thin slice 4b that is configured in the downstream is one group.
In this example, above-mentioned the opposing party basis thin slice 32 and valve body thin slice 4 use all identical thin slices (plastic sheeting) of raws MAT'L and thickness.These thin slices 32,4 use " self-tightening connects airtight box-like " thin slice (film), the opposing party's easy and that dispose in opposite directions thin slice tight joint.In addition, as described later, side's side group plinth thin slice 31 uses nonwoven fabrics.But the structure of each thin slice is not limited to this example, for example, if make basic thin slice 31,32 be exposed at the outside of sealing bag 1, then also can make basic thin slice 32 form the thin slice thicker than valve body thin slice 4.
All only relative side's side group plinth thin slice 31 is bonding to constitute above-mentioned one group each valve body thin slice 4a, 4b.If have under three situations with upper valve body thin slice 4, also can make valve body thin slice 4 bonding with the opposing party basis thin slice 32.Even if in this case, all at least one relatively side's side group plinth thin slice 31 is bonding to constitute each valve body thin slice 4a, 4b of one group, this be of the present invention must condition.
Constitute the formation bonding like this of the above-mentioned one group relative side's side group plinth thin slice 31 of each valve body thin slice 4a, 4b, make that each valve body thin slice 4a, the interior air flow line of the valve when 4b discharges relatively form series connection and both sides are not overlapping in table back of the body direction.
And, the bonding upstream extremity 4a1 side that is formed on of the relative side's side group plinth thin slice 31 of upstream side valve body thin slice 4a.In Fig. 1 (B), represent this bonding portion with s1.The downstream end 4a2 side of upstream side valve body thin slice 4a can move relative to above-mentioned basic thin slice 31,32.
In addition, the above-mentioned bonding downstream end 4b2 side that is formed on of downstream valve body thin slice 4b.In Fig. 1 (B), represent this bonding portion with s2.The upstream extremity 4b1 side of downstream valve body thin slice 4b can move relative to above-mentioned basic thin slice 31,32.In this example, the downstream end 4b2 of downstream valve body thin slice 4b is consistent with the downstream end 31b of side's side group plinth thin slice 31.
That is, as mentioned above, by bonding each valve body thin slice 4a, 4b, each valve body thin slice 4a, 4b are configured on side's side group plinth thin slice 31 free end Face to face.
In addition, the interval of above-mentioned each valve body thin slice 4a, 4b is preferably formed very little interval, namely as described later by utilizing thin slice of cutting blade cutting to form otch.By the very little interval of such formation, even when exhaust nozzle is inserted degassing valve V, layer is not poor owing to not existing between each valve body thin slice 4a, 4b, so nozzle can not be stuck.
In addition, above-mentioned free end is basic relatively thin slice 31,32 each end lamellae 4a2,4b1 opposite side basis thin slice 32 tight joint relatively of that side movably among each valve body thin slice 4a, 4b.Under the situation that does not form this tight joint, shown in Fig. 1 (B), between each valve body thin slice 4a, 4b and opposite side basis thin slice 32, form the gap, air-flow is opened by space 3a.
In addition, owing to opposite side basis thin slice 32 is soft materials, therefore when opening this air-flow by space 3a as described above, the opposing party's side group plinth thin slice 32 passes through the downward side shifting of discharge pressure shown in Fig. 1 (B).Therefore, air-flow can not stop up halfway by space 3a, can carry out unobstructed exhaust.
At this moment, even just in case (for example owing to reasons such as dewfall) downstream valve body thin slice 4b and opposite side basis thin slice 32 form not segregative state, air-flow during discharge also can be by the exposed division 31c (being positioned at the part of article storing portion 2 outsides when being installed in boiler check valve V on the sealing bag 1) in side's side group plinth thin slice 31, the exhaust of therefore being not difficult.
On the other hand, as shown in Figure 2, in case the pressure ratio bag outside of article storing portion 2 is low, then produce negative pressure f in the inside of boiler check valve V.Each valve body thin slice 4a, 4b float from side's side group plinth thin slice 31 owing to this negative pressure f.As mentioned above, what opposite side basis thin slice 32 and each valve body thin slice 4a, 4b used is " self-tightening connects airtight box-like " thin slice, and therefore aspectant both sides carry out tight joint really by above-mentioned floating.Under the situation that has realized tight joint, the gap between each valve body thin slice 4a, 4b and the opposite side basis thin slice 32 disappears, and air-flow is closed by space 3a.
At this moment, might shown in arrow among Fig. 2, flow into by the exposed division 31c air-flow s of adverse current in boiler check valve V from side's side group plinth thin slice 31.If like this, the air-flow s that each valve body thin slice 4a, 4b should be wanted adverse current is by being pressed on the opposing party's side group plinth thin slice 32, and both sides are tight joint securely further.Therefore, air-flow is closed more firmly by space 3a.
In this example, as shown in Figure 2, each valve body thin slice 4a, 4b be relative the opposing party's side group plinth thin slice 32 tight joint respectively.That is, owing to two local tight joint that form, therefore compare with the structure of the boiler check valve shown in the patent documentation 1, the reliability of non-return effect further improves.Therefore, need not as the invention of patent documentation 1, to apply the low viscosity (LV) inert fluid.Therefore, be conducive to reduce the manufacturing cost of boiler check valve.But in order further to improve the reliability of non-return effect, also can apply low viscosity (LV) inert fluid (for example silicone oil etc.).
In addition, on the opposing party's side group plinth thin slice 32 also under the situation of bonding valve body thin slice 4, each valve body thin slice 4a, 4b are respectively relatively and bonding valve body thin slice 4 tight joint of the opposing party's side group plinth thin slice 32.
In this example, the bonding side's side group plinth thin slice 31 that constitutes above-mentioned a group each valve body thin slice 4a, 4b all has permeability to air on whole.More particularly, in this example, the side's side group plinth thin slice 31 with this permeability to air uses nonwoven fabrics.
The air-flow that air-flow when the part in above-mentioned side's side group plinth thin slice 31 is formed on above-mentioned discharge passes through in table back of the body direction is by the 31a of portion.This air-flow by the 31a of portion be in side's side group plinth thin slice 31, with the upstream extremity 4a1 of the bonding upstream side valve body thin slice 4a part at the upstream side of table back of the body direction consistent location.
And, all have permeability to air on 31 whole of one side's side group plinth thin slices, but and each valve body thin slice 4a, 4b to be valve support portion 31b in the overlapping part of table back of the body direction can not become the part of passing through as the air-flow of air-flow by the 31a of portion (but can pass through as described above by the air-flow between each end 4a2,4b1 of each valve body thin slice 4a, 4b) under boiler check valve V is installed in state on the sealing bag 1.
In this example, because side's side group plinth thin slice 31 is nonwoven fabrics, therefore at above-mentioned valve support portion 31b, form rough surface with each valve body thin slice 4a, 4b face in opposite directions.Therefore, even each valve body thin slice 4a, 4b are " self-tightening connect airtight box-like " as mentioned above, also can easily separate with side's side group plinth thin slice 31.
At present, separate easily like this in order to make the valve body thin slice, applying coatings on basic thin slice and valve body thin slice face in opposite directions, but according to the structure of side's side group plinth thin slice 31 of this example, need not applying coatings.This point also is conducive to reduce the manufacturing cost of boiler check valve.
Wherein, above-mentioned side's side group plinth thin slice 31 need not all to have as shown in this example permeability to air on whole.Also can be by only using some thin slice with permeability to air or bondingly having the thin slice of permeability to air and a thin slice of no permeability to air, only making air-flow pass through the 31a of portion can breathe freely.Even in this case, separate with side's side group plinth thin slice 31 easily in order to make each valve body thin slice 4a, 4b, preferably form rough surface by carry out Corona discharge Treatment etc. at valve support portion 31b.
As mentioned above, the downstream end 4b2 of the downstream valve body thin slice 4b in this example is consistent with the downstream end 31b of side's side group plinth thin slice 31.In this example, length side's phase size of side's side group plinth thin slice 31 is longer than the opposing party's side group plinth thin slice 32, each basic thin slice 31, the alignment of 32 upstream side.Therefore, in the valve body thin slice 4b of downstream, with the downstream end 32a of the opposing party's side group plinth thin slice 32 part in the downstream of table back of the body direction consistent location, form with the opposing party's side group plinth thin slice 32 at the nonoverlapping noncontact 4b3 of portion of table back of the body direction.
If the downstream side end edge that the 4b3 of noncontact portion is not set like this but makes boiler check valve V, then is subjected to the influence of the warp (undulation) that produces at thin slice easily in table back of the body direction unanimity, produce adverse current by capillarity easily.Because above-mentioned warp has the closer to the more tangible trend in end limit, therefore in this example, avoid holding the border district to stagger by the position that makes the relative side's side thin slice tight joint of the opposing party's side thin slice, make the opposing party's side group plinth thin slice 32 and downstream valve body thin slice 4b tight joint as illustrated in fig. 2, thereby reduce the influence of above-mentioned warp.By the 4b3 of noncontact portion is set like this, can prevent backflow effectively.
The upstream extremity of the boiler check valve V of said structure is positioned at the article storing portion 2 of sealing bag 1, and downstream end is positioned at outside the above-mentioned article storing portion 2.Position relation for the relative sealing bag 1 of boiler check valve V, the downstream end of boiler check valve V also can be outstanding from the end limit of sealing bag 1, but in this example as Fig. 3 (A) (B) shown in, boiler check valve V is installed on the ground, position than the more close article storing in end limit portion 2 that makes the downstream end of boiler check valve V be positioned at sealing bag 1.That is, the valve integral body of the boiler check valve V in this example is sandwiched between bag thin slice 11,12.By like this, boiler check valve V is subjected to bag thin slice 11,12 protection, and therefore basic thin slice 31,32 can use thinner thin slice (plastic sheeting).In addition, owing to can prevent that boiler check valve V is outstanding from the end limit of sealing bag 1, so the outward appearance of sealing bag 1 is also good-looking, has prevented also when keeping sealing bag 1 etc. that outstanding boiler check valve V is in the way.In addition, the seal point 15 of Fig. 3 (A) shown in (B) is that bonding each bag thin slice 11,12 also can omit in order in the downstream of boiler check valve V a bag thin slice 11,12 to be put together together.
In this example, it is poor that the shape that is used for bonding bag thin slice 11,12 heat-sealing shown in (B) as Fig. 3 (A) has layer.By like this, cut away a part of article storing portion 2 ground and form.Boiler check valve V is configured on this part of cutting away.In addition, in this example, formed this and " cut away portion " overlooking bight for rectangular sealing bag 1, utilize article storing portion 2 as far as possible biglyyer, but the invention is not restricted to this, for example also can be according to the requirement in the design, central authorities form " cutting away portion " in the end of sealing bag 1.
In the distolateral part in upstream on the opposing party's side group plinth thin slice 32 of boiler check valve V and the bag thin slice 11,12 and bag thin slice 11 above-mentioned the opposing party's basis thin slice 32 that side in opposite directions, any one inner face of 12 are bonding.In this example, bonding with back side side pocket thin slice 12 as illustrated in fig. 4 by forming fixedly strip of paper used for sealing 6 of valve, by like this, the air-flow of side's side group plinth thin slice 31 of boiler check valve V exposes by the space of the article taken in of the 31a of portion in the article storing portion 2.This valve fixedly strip of paper used for sealing 6 is arranged on the transverse ends of boiler check valve V in this example shown in Fig. 1 (C) linearly, but as shown in Figure 4, as long as boiler check valve V can follow the distortion of back side bag thin slice 12, can carry out various changes to position relation, shape, quantity.In addition, in order to make boiler check valve V effectively along the inner face of the dead end shape portion 21 of arc described later, this valve fixedly strip of paper used for sealing 6 preferably is arranged on the air flow line downstream of the upstream extremity 141 of vertical strip of paper used for sealing 14.Expose air-flow as described above by the 31a of portion, thereby the air that will be present in article storing portion 2 easily guides to boiler check valve V, can the exhaust of unobstructed ground.
In addition, by bonding (heat-sealing) each bag sheet 11,12 mutually, formed transverse seal 13 at sealing bag 1.In addition, above-mentioned vertical strip of paper used for sealing 14 and to cross strip of paper used for sealing 13 be not expression sealing bag 1 and each bag thin slice 11,12 position in length and breadth, but will be along the direction of the upstream and downstream of boiler check valve V as vertically, will with its direction that intersects as laterally (crossing).
This transverse seal 13 more particularly, is formed on the downstream of the upstream extremity 4a1 of upstream side valve body thin slice 4a laterally crossing the formation of boiler check valve V ground.Transverse seal 13 (B) is shown in and forms rectilinear form in the birds-eye view as Fig. 3 (A) in this example, but also can form waveform.If form such waveform, then when discharging air, exhaust gas pressure laterally is being applied on the boiler check valve V unevenly, has to open air-flow easily by the advantage of space 3a.
In addition, in this example, the inner face coating of the opposing party's side group plinth thin slice 32 in the part that forms transverse seal 13 is peeled off with coating 7, hot slight bonding the opposing party's side group plinth thin slice 32 and upstream side valve body thin slice 4a when utilize forming heat-sealing and being transverse seal 13, can avoid can not unobstructed exhaust problem.The inner face that also nonwoven fabrics can be sticked on the opposing party's side group plinth thin slice 32 in addition replaces this to peel off with coating 7.
Except above-mentioned transverse seal 13, form vertical strip of paper used for sealing 14 at sealing bag 1 each other by bonding (heat-sealing) each bag thin slice 11,12.This vertical strip of paper used for sealing 14 is the directions (being the direction of orthogonal in this example) that intersect with above-mentioned transverse seal 13, and the air flow line during with the discharge in the above-mentioned boiler check valve V is benchmark, extends to the upstream side of this transverse seal 14.And above-mentioned vertical strip of paper used for sealing 14 forms as described below, that is, above-mentioned boiler check valve V is clipped, and reserves the wideer interval of width dimensions than this boiler check valve V, and inboard vertically strip of paper used for sealing 14a and two of the vertical strip of paper used for sealing 14b in the outside are one group.In this example, the vertical strip of paper used for sealing 14b in the outside that be formed on boiler check valve V right side of Fig. 3 (A) in (B) simultaneously double as be formed at the side seal bar on sealing bag end limit.In addition, in this example, the vertical strip of paper used for sealing 14a in above-mentioned inboard and transverse seal 13 form simultaneously by a seal bar (hot plate).
The upstream extremity 141 of vertical strip of paper used for sealing 14, air flow line during with the discharge in the boiler check valve V is benchmark, compare air-flow at side's side group plinth thin slice 31 by the 31a of portion in by above-mentioned transverse seal 13 regulations, the lower end 31a1 of the part passed through of air in fact, be positioned at upstream side.About the upstream extremity of boiler check valve V and the vertical position relation of the upstream extremity 141 of strip of paper used for sealing 14, this upstream extremity 141 preferably is arranged on the position more than the upstream extremity of boiler check valve V at air flow line.In this example, shown in Fig. 3 (A), the upstream extremity 141 among the inboard vertically strip of paper used for sealing 14a becomes almost identical position with the upstream extremity of boiler check valve V at air flow line.In addition, even this upstream extremity 141 is arranged on the downstream of the upstream extremity of boiler check valve V, overlapping with the dead end shape portion 21 of arc described later for a lot of parts that air-flow is passed through among the 31a of portion, preferably dwindle the distance on the air flow line of this upstream extremity 141 and the upstream extremity of boiler check valve V as far as possible.
In addition, in this example, the vertical strip of paper used for sealing 14a in this inboard forms continuously at graphic above-below direction, but for example also can arrange among Fig. 3 (A) with the ventilative gap 14c shown in the dotted line, can also make inboard vertically strip of paper used for sealing 14a become the mode of interruption shown in Fig. 3 (B).In this case, also can be as described later, forming deformable is the dead end shape portion 21 of arc, and the air of diagram left part in the article storing portion 2, that be present in inboard vertically strip of paper used for sealing 14a is passed through ventilative gap 14c to boiler check valve V guiding, can the exhaust of unobstructed ground.
Form dead end shape portions 21 by above-mentioned transverse seal 13 and vertical strip of paper used for sealing 14.This dead end shape portion 21 presses under the situation about rising in making under the situation of pressing article storing portion 2 with hand or because the article taken in produce gas, and as shown in Figure 4, cross-sectional plane expand into arc.As mentioned above, boiler check valve V is owing to bonding with back side side pocket thin slice 12, so boiler check valve V will be along the inner face of the dead end shape portion 21 that becomes arc as described above.
When exhaust, the air of article storing portion 2 is at first guided to dead end shape portion 21, passes through to discharge to bag is outside behind the 31a of portion by air-flow successively then.On the other hand, if do not form this dead end shape portion 21, then possible insufficient expansion between each bag thin slice 11,12 when exhaust can not the exhaust of unobstructed ground.When forming dead end shape portion 21 then above-mentioned condition can not take place, exhaust more swimmingly, thus also reduced above-mentioned " initial pressure ".
At this, in existing sealing bag, boiler check valve is not easy to open, and above-mentioned in order to dwindle " initial pressure " arranges boiler check valve in the end of sealing bag, causes basic thin slice and the distortion of valve body thin slice of boiler check valve on the contrary sometimes.Can dwindle " initial pressure " although it is so, but on the contrary the problem that causes adverse current easily be arranged also.With respect to this, boiler check valve V of the present invention can carry out unobstructed exhaust individually, to be installed on the sealing bag 1 the position without limits, can improve the Design freedom of sealing bag 1.
Below, describe with regard to the manufacture method of above-mentioned boiler check valve V.Above-mentioned basic thin slice 31,32 and valve body thin slice 4 use the long size thin slice that is supplied to continuously vertically.And, constituted above-mentioned one group each valve body thin slice 4a, 4b and supplied with by a long size thin slice, then with cutting blade after transverse cuts becomes two, overlapping and bonding with side's side group plinth thin slice 31.By this cutting, the material of above-mentioned valve body thin slice 4 namely a long size thin slice formed otch.And, carry out behind the above-mentioned otch above-mentioned overlappingly immediately owing to form, so the interval of each valve body thin slice 4a, 4b is maintained under the state at very little interval and carries out bonding.Therefore, compare with the situation of supplying with thin slice as the material of each valve body thin slice 4a, 4b respectively, can be simply and make boiler check valve V accurately, can not improve manufacturing cost yet.
In addition, for needing in the manufacturing installation design etc., also can be with above-mentioned opposite, at first overlapping with side's side group plinth thin slice 31 by the valve body thin slice 4 that a long size thin slice is supplied with, valve body thin slice 4 usefulness cutting blades with this overlap condition laterally are being cut into two then, form each valve body thin slice 4a, 4b.
Boiler check valve V is cut into one by one in the time of on being installed in sealing bag 1 laterally conjointly manufactured.But also the continuous valve at horizontal a plurality of continuous states can be installed on the sealing bag 1.
Below, the manufacture method of the sealing bag 1 of above-mentioned boiler check valve V just has been installed has carried out simple declaration.That bag thin slice 11,12 uses is that soft resin material is made, at the long size thin slice of vertically supplying with continuously.In addition, the manufacture method of sealing bag 1 comprises above-mentioned boiler check valve V is clipped in operation between each bag thin slice 11,12, forms the operation of above-mentioned transverse seal 13, the operation by bonding bag thin slice 11, the above-mentioned vertical strip of paper used for sealing 14 of 12 formation equally by bonding bag thin slice 11,12.Can make the sealing bag with boiler check valve continuously by this manufacture method.
Be not limited to the bag shown in Fig. 3 (A), as other embodiment, this boiler check valve V can be installed on the sealing bag 201 of what is called " upright pillow " formula of the packing through being usually used in coffee bean shown in Fig. 5 (A) etc.State when in addition, each figure of Fig. 5 represents article storing.Fig. 5 (C) records and narrates is the inboard that bag is represented in the top of figure, and the outside of bag is represented in the below of figure.
When making the sealing bag 201 of such " upright pillow " formula, with broken line 212, the 212 places turnover of a bag thin slice 211 in the left and right sides of bag, the side end limit consistent (formation put the palms together before one state) each other that makes bag thin slice 211 overleaf, boiler check valve V is clipped in carries out bondingly between in opposite directions the above-mentioned end limit, the strip of paper used for sealing that forms is like this used as above-mentioned transverse seal 13.In addition, as Fig. 5 (B) (C) shown in, comparing the mode that above-mentioned transverse seal 13 enters into the private side of sealing bag 201, form strip of paper used for sealing between the bonding bag thin slice 211.This strip of paper used for sealing is brought into play the effect of above-mentioned vertical strip of paper used for sealing 14.In the example shown in Fig. 5 (B), at the vertical upstream extremity of strip of paper used for sealing 14, the auxiliary strip of paper used for sealing 16 that extends in parallel with boiler check valve V reversing sense, with transverse seal 13 is set, by like this, can be effectively in the dead end shape portion 21 guiding bags gas.
For the sealing bag 201 of this " upright pillow " formula, also same with the bag shown in Fig. 3 (A), by transverse seal 13 and vertically strip of paper used for sealing 14 form dead end shape portions 21, if bag in press liter, then the cross-sectional plane of this dead end shape portion 21 just expand into arc (with reference to figure 4).Therefore with above-mentioned same, sealing bag 201 also can the exhaust of more unobstructed ground, can also reduce above-mentioned " initial pressure ".Therefore, often producing the article of gas (carbon dioxide etc.) if collecting article is coffee bean etc., thus then can not take place gas because of this generation be difficult to bag outside, discharge cause in remaining in bag sealing bag 201 expand inexquisite situation.
In example shown in Figure 3, boiler check valve V is arranged on the bottom of sealing bag 1, but can suitably changes the position that boiler check valve V is set, can be the sidepiece of sealing bag 1, also can be the central portion (front or the back side) of sealing bag 1.
The example of Fig. 6 (A) is arranged on the locational example of the close article storing mouth 1a of sealing bag 1 sidepiece.In this example, making two bag thin slices 11,12 become recess 211 to horizontal canyon topography near the position with article storing mouth 1a of chuck, boiler check valve V is installed in the mode of growing crosswise with clipping.This recess 211 is sealed to form by two bag thin slices 11,12.
The strip of paper used for sealing of the inboard of this recess 211 becomes above-mentioned transverse seal 13.In this example, taking under the situation of liquid substance or taking in out under the situation of food etc. of juice, owing at the bottom of liquid substance accumulates in bag, therefore by boiler check valve V being arranged on the position near article storing mouth 1a, can avoid liquid substance that boiler check valve V is had adverse effect.In addition, in the present embodiment, vertical strip of paper used for sealing 14 that also can arrange in each example of front is implemented.
Fig. 6 (B) example (C) is arranged on the example of the central portion (front or the back side) of sealing bag 1.In this example, with a side the bag thin slice 11 be divided into the first thin slice 11a and the second thin slice 11b.The end limit of this first thin slice 11a and the second thin slice 11b seals mutually, forms a bag strip of paper used for sealing, and boiler check valve V is installed between the first thin slice 11a and the second thin slice 11b with clipping.Strip of paper used for sealing between this first thin slice 11a and the second thin slice 11b becomes the transverse seal 13 of crossing boiler check valve V.In this example, the downstream of boiler check valve V is positioned at the outside (outside of bag) of a side thin slice (the second thin slice 11b), and the upstream side of boiler check valve V is positioned at the inner face (inboard of bag) of the opposing party's thin slice (the second thin slice 11b).Though no matter boiler check valve V shows the back of the body can install, in this example, the inner face side that will be configured in by side's side group plinth thin slice 31 that nonwoven fabrics etc. forms bag.Make side's side group plinth thin slice 31 be positioned at the first thin slice 11a that side in opposite directions installed under the situation of boiler check valve V, food is accommodated in the sealing bag 1 when heating with micro-wave oven, the air that expands because of heating is pressed side's side group plinth thin slice 31 of boiler check valve V to the first thin slice 11a, can not discharge air unobstructedly, and inboard by side's side group plinth thin slice 31 being configured in bag, can discharge the expanded air in the bag unobstructedly.Especially in this example, need not above-mentioned example like that for boiler check valve V and sealing bag 1 is bonding and the heat seal lands of needed transverse seal 13 is installed.Its result, can discharge with lower pressure, for example, if implemented as the bag of the article of taking in generation gases such as coffee bean or laundry soap powder, gas from this article generation to the bag outside that can discharge, the expansion of prevention bag, then can reduce the initial pressure ground of institute's exhaust body and discharge.
In addition, the second thin slice 11b preferably uses the thin slice that can carry out two-sided heat-sealing.Specifically be the preferred common ironed film that is formed by two-sided polyethylene foil that uses.This be because this second thin slice 11b a side face (face in the outside among the figure) with comprise that the first thin slice 11a of transverse seal 13 seals, in the opposing party's face (face of the inboard among the figure) and the opposing party's bag thin slice 12 sealings.If use the thin slice that can only seal a side, then shown in the example of Fig. 5, also can turn down the end limit that seals and seal.In addition, owing to can use the two-sided heat-sealing that is formed by two-sided polyethylene foil etc., then the example of Fig. 5 does not need to turn down yet.
In addition, in this embodiment, vertical strip of paper used for sealing 14 that also can arrange in each example above using is implemented.
Represent other embodiment based on Fig. 7.In this example, changed the part of the boiler check valve V of Fig. 1, below by the change part centered by describe, unaccounted position is the same with the boiler check valve V of Fig. 1.
In this example, form side's side group plinth thin slice 31 with two kinds of thin slices.Specifically be, the thin slice 31a that is positioned at upstream side in side's side group plinth thin slice 31 is identical with the example of Fig. 1, is that air-flow passes through the 31a of portion, and the thin slice that is had permeability to air by nonwoven fabrics etc. constitutes.The thin slice 31d in downstream is different with the example of front, and 31d constitutes by the air-tightness thin slice.These air-flows are by the end of the 31a of portion and air-tightness thin slice 31d, and are bonding at bonding portion s1 with the upstream extremity 4a1 of upstream side valve body thin slice 4a.
In the example of Fig. 1, make the opposing party's side group plinth thin slice 32 to one side's side group plinth thin slices 31 shorter, form air by-pass passage, but in this example, make the big or small identical of the opposing party's side group plinth thin slice 32 and side's side group plinth thin slice 31, bonding its whole periphery forms complete cycle adhesive portion s3.
The opposing party's side group plinth thin slice 32 is identical with the example of Fig. 1, adopts to have bubble-tight thin slice, and by forming the suitably flow export 32b of shape such as otch, as the distolateral flow export in downstream.This flow export 32b is configured in the downstream (right side of figure) of the upstream extremity 4b1 of the downstream end 4a2 of upstream side valve body thin slice 4a and downstream valve body thin slice 4b.
Shown in Fig. 7 (D), this boiler check valve V can be configured in the inside of sealing bag 1.Bag vent 17 ground that cover on the back side side pocket thin slice 12 that is arranged at sealing bag 1 from the inboard dispose this boiler check valve V, and its complete cycle and back side side pocket thin slice 12 is bonding.Can share also that this is bonding with above-mentioned complete cycle adhesive portion s3, also can seal separately.In the drawings, flow export 32b is arranged on the identical position with bag vent 17, but so long as in the scope of above-mentioned complete cycle adhesive portion s3, also can be arranged on the different positions.
Under the situation of the air in discharging sealing bag 1, air enters in the boiler check valve V by the 31a of portion from air-flow, flows out to the outside from bag vent 17 through flow export 32b.If air will flow into from the outside, then just form negative pressure in the boiler check valve, upstream side valve body thin slice 4a and downstream valve body thin slice 4b and the opposing party's side group plinth thin slice 32 tight joint and close closed channel.
In addition, shown in Fig. 7 (E), this boiler check valve V also can be configured in the outside of sealing bag 1.Bag vent 17 ground that are arranged at from outer side covers on the back side side pocket thin slice 12 of sealing bag 1 dispose this boiler check valve V, and its complete cycle and back side side pocket thin slice 12 is bonding.Can share also that this is bonding with above-mentioned complete cycle adhesive portion s3, also can seal separately.In the drawings, air-flow is arranged on the identical position with bag vent 17 by the 31a of portion, but so long as in the scope of above-mentioned complete cycle adhesive portion s3, also can be arranged on the different positions.
Under the situation of the air in discharging sealing bag 1, air enters in the boiler check valve V by the 31a of portion through air-flow from bag vent 17, and 32b flows out to the outside from flow export.If air will flow into from the outside, then just form negative pressure in the boiler check valve, upstream side valve body thin slice 4a and downstream valve body thin slice 4b and the opposing party's side group plinth thin slice 32 tight joint and close closed channel.
The inside that no matter this boiler check valve V is installed in sealing bag 1 is still outside, and boiler check valve V and a bag vent 17 also can be configured on the surperficial side pocket thin slice 11.
In addition, this Fig. 7 has represented lower-upper length turgidly, and each thin slice always is bonded together in fact, only just opens very little gap under the situation of airiness.
Can apply crooked strip of paper used for sealing s4, s5 as boiler check valve V of the present invention for any embodiment, form zigzag stream in the birds-eye view.An one object lesson is shown in Fig. 8.This example has changed the part of the example of Fig. 7, only describe changing part, and the part beyond the explanation is identical with the example of Fig. 7.
This routine boiler check valve V is identical with the example of Fig. 1, makes the opposing party's side group plinth thin slice 32 to one side's side group plinth thin slices 31 short, with the space between the opposing party's side group plinth thin slice 32 and the complete cycle adhesive portion s3 as flow export 32b.Can certainly adopt the flow export 32b shown in the example of Fig. 7.
The almost total length from the upstream extremity to the downstream end at boiler check valve V forms crooked strip of paper used for sealing s4, s5, the bonding side's side group plinth thin slice 31 of table back of the body direction, valve body thin slice 4 and the opposing party's side group plinth thin slice 32 these threes.The air-flow of this boiler check valve V and Fig. 7 (B) is the same by the 31a of portion, has adopted nonwoven fabrics etc. to have the thin slice of permeability to air, but in order to understand ground expression crooked strip of paper used for sealing s4, s5 easily, has been differently to have omitted grid with Fig. 7 (B) among Fig. 8 (A) at this birds-eye view.
In this example, form two crooked strip of paper used for sealing s4, s5, the interval between two crooked strip of paper used for sealing s4, the s5 enlarges gradually, thereby more more is expanded into infundibulate (ロ one ト shape) near its upstream side (left side of figure) at air-flow in by the 31a of portion.Thus, air is entered in the boiler check valve V unobstructedly by the 31a of portion from air-flow.In the part with valve body thin slice 4, two crooked strip of paper used for sealing s4, s5 simultaneously keep little gap one side crooked or bendingly towards the downstream (right side of figure).The length difference of two crooked strip of paper used for sealing s4, s5, crooked strip of paper used for sealing s4 of the side surpasses upstream side valve body thin slice 4a, disappears in the stage that enters downstream valve body thin slice 4b.The opposing party's crooked strip of paper used for sealing s5 extends to the downstream end of the opposing party's side group plinth thin slice 32 and disappears.On the downstream end and the flow export 32b between the complete cycle adhesive portion s3 of the opposing party's side group plinth thin slice 32, do not form crooked strip of paper used for sealing s4, s5.This is for air can be discharged from flow export 32b unobstructedly.Certainly, the example of crooked strip of paper used for sealing s4, s5 has only been represented in above-mentioned explanation, is enlarging stream near its upstream extremity with near downstream end, the air inside and outside the boiler check valve V is circulated unobstructedly as long as when the part with valve body thin slice 4 weakens the rectilinear propagation of air stream is narrowed down.In addition, though formed two crooked strip of paper used for sealing s4, s5, also can only form one.In this case, form stream between crooked strip of paper used for sealing and the complete cycle adhesive portion s3.On the contrary, also can form crooked strip of paper used for sealing more than three, also can use in the lump with seal point etc.In addition, also can cut out out the shape of side's side group plinth thin slice 31 and the opposing party's side group plinth thin slice 32 along the shape of crooked strip of paper used for sealing s4, s5, also can make the part of crooked strip of paper used for sealing s4, s5 double as complete cycle adhesive portion s3.
And, in this example, with inert substances such as a spot of liquid-state silicon 8 be provided in two streams between crooked strip of paper used for sealing s4, the s5 midway, be configured between valve body thin slice 4 and the opposing party's side group plinth thin slice 32.When closing closed channel in this upstream side valve body thin slice 4a and the opposing party's side group plinth thin slice 32 tight joint, improve tight joint between the two, prevent that air from spilling.Thereby, in this example, only inert substances such as liquid-state silicon 8 are configured between upstream side valve body thin slice 4a and the opposing party's side group plinth thin slice 32, but also can be configured between downstream valve body thin slice 4b and the opposing party's side group plinth thin slice 32.
This boiler check valve V is identical with the example of Fig. 7, can be configured in inside or the outside of sealing bag 1, prevents fluid countercurrent current by the effect identical with the boiler check valve V of Fig. 7, only allows fluid to flow to a direction (from the inboard of bag laterally in the present example).Fig. 8 (D) expression is installed in the example in bag thin slice 12 outsides of sealing bag 1.
As mentioned above, this boiler check valve V is by arranging crooked strip of paper used for sealing s4, s5, and the stream of air forms lost shape, even therefore under the situation that air flows to positive dirction, also produces some resistances.Can carry out various changes to the degree of formation resistance according to shape, size or the length of crooked strip of paper used for sealing s4, s5, can adjust according to its purposes.For example, if this boiler check valve V is used for taking in the sealing bag of food, the steam that produces from food with defreezing by microwave oven or heating the time is discharged to sealing bag is outside by this boiler check valve V, and forming the resistance that air is discharged by crooked strip of paper used for sealing s4, s5 are set, steam is discharged outside bag gradually.By like this, can steaming food, can utilize micro-wave oven to carry out the more delicious culinary art of thawing.Like this, can be according to needed air discharge rate, the shape or the size (length, width) that suitably change crooked strip of paper used for sealing s4, s5 are used.
Fig. 9 (A) expression is provided with the example of the valve body thin slice 91 that is different from above-mentioned valve body thin slice 4a, 4b.This new valve body thin slice 91 is arranged between above-mentioned valve body thin slice 4a, the 4b and the opposing party's side group plinth thin slice 32 of boiler check valve V inside, can with at least any one party tight joint of above-mentioned two valve body thin slice 4a, 4b, this new valve body thin slice 91 passes through fluid with above-mentioned two valve body thin slice 4a, 4b combineds action and prevents backflow.In other embodiment of the present invention, also can adopt this new valve body thin slice 91.
In the example of above-mentioned Fig. 7, Fig. 8, the air-flow that one side's side group plinth thin slice 31 is divided into nonwoven fabrics etc. is implemented by the 31a of portion and air-tightness thin slice 31d, the material that also can be shown in Fig. 9 (B) has a permeability to air by nonwoven fabrics etc. forms the integral body of side's side group plinth thin slice 31, with having bubble-tight coating with 92 parts that cover its downstream of thin slice.By with whole side's side group plinth thin slices 31 of formation such as nonwoven fabrics, can prevent valve body thin slice 4a, 4b unnecessarily do not bring into play boiler check valve with side's side group plinth thin slice 31 tight joint the such situation of effect.Coat with the thickness of thin slice 92 etc. though can arrange arbitrarily, by using thicker big hard sheet, can prevent that collecting article in the sealed bag of boiler check valve V from pressing and bend or problem such as distortion, can protective valve and give full play to its function.
By the boiler check valve V of above-mentioned explanation is provided, can prevent as far as possible simultaneously that the manufacturing cost of boiler check valve V from increasing, one side improves the reliability of non-return effect, can make the various sealing bags 1 that this boiler check valve has been installed more excellent than existing bag.
And, be under the situation of perishable article such as food at the collecting article of sealing bag 1 especially, owing to can make the exhaust of article storing portion 2 unobstructedly, therefore have the effect that prevents the collecting article oxidation, help fresh-keeping.
Description of reference numerals
1 sealing bag, 11 surperficial side pocket thin slices, 12 back side side pocket thin slices, 13 transverse seal, 14 vertical strip of paper used for sealings, the upstream extremity of 141 vertical strip of paper used for sealings, 2 article storing portions, the 3a air-flow passes through the space, 31 1 side's side group plinth thin slices, the 31a air-flow is by portion, 32 the opposing party's side group plinth thin slices, 4 valve body thin slices, 4a upstream side valve body thin slice, the upstream extremity of 4a1 upstream side valve body thin slice, the downstream end of 4a2 upstream side valve body thin slice, 4b downstream valve body thin slice, the upstream extremity of 4b1 downstream valve body thin slice, the downstream end of 4b2 downstream valve body thin slice, the noncontact portion of 4b3 downstream valve body thin slice, V boiler check valve.

Claims (8)

1. boiler check valve, this boiler check valve is mounted use on the sealing bag with article storing portion (2) (1), for to the outside gas that is present in described article storing portion (2) of discharging of bag, can be breathed freely in article storing portion (2) and a bag outside,
When discharging described gas, pass through space (3a) by the air-flow that opens and closes as the space that described gas is passed through, the air-flow that can allow to discharge direction passes through, and blocks the air-flow that sucks direction,
It is characterized in that having soft resinous basic thin slice (31,32) and many valve body thin slices (4),
Described basic thin slice (31,32) arranges opposite to each other in table back of the body direction,
In described many valve body thin slices (4), the air flow line when discharging is baseline configuration at the upstream side valve body thin slice (4a) of upstream side and at least two of downstream valve body thin slice (4b) that are configured in the downstream of same benchmark is one group,
All at least one relatively side's side group plinth thin slice (31) is bonding to constitute described one group each valve body thin slice (4a, 4b),
The air flow line that described bonding so that described each valve body thin slice (4a, 4b) is described relatively when discharging becomes series connection and both sides carry out in the nonoverlapping mode of table back of the body direction,
Upstream extremity (4a1) side that is bonded in of the described relatively side's side group plinth thin slice (31) of described upstream side valve body thin slice (4a) forms, and downstream end (4a2) side can move relative to described basic thin slice (31,32),
Described downstream end (4b2) side that is bonded in of described downstream valve body thin slice (4b) forms, and upstream extremity (4b1) side can move relative to described basic thin slice (31,32),
Among described each valve body thin slice (4a, 4b), each end (4a2,4b1) of that side that can move relative to described basic thin slice (31,32), the opposing party's side group plinth thin slice (32) can tight joint relatively,
Perhaps, relatively can tight joint with described the opposing party's side group plinth thin slice (32) valve body thin slice (4) bonding, that constitute outside the described one group valve body thin slice.
2. boiler check valve according to claim 1 is characterized in that, the bonding side's side group plinth thin slice (31) that constitutes described one group each valve body thin slice (4a, 4b) has permeability to air at whole,
The air-flow that air-flow when this has a part among side's side group plinth thin slice (31) of permeability to air and forms described the discharge passes through in table back of the body direction is by portion (31a),
This air-flow by portion (31a) be among described side's side group plinth thin slice (31), with the upstream extremity (4a1) of described upstream side valve body thin slice (4a) part at the upstream side of table back of the body direction consistent location.
3. boiler check valve according to claim 2 is characterized in that, described side's side group plinth thin slice (31) with permeability to air is nonwoven fabrics.
4. according to each described boiler check valve in the claim 1 to 3, it is characterized in that only described relatively side's side group plinth thin slice (31) is bonding to constitute described one group each valve body thin slice (4a, 4b),
Described downstream valve body thin slice (4b) has noncontact portion (4b3),
This noncontact portion (4b3) be among described downstream valve body thin slice (4b), with the downstream end (32a) of described the opposing party's side group plinth thin slice (32) part in the downstream of table back of the body direction consistent location.
5. a sealing bag is characterized in that, is the sealing bag of having installed according to claim 2 or 3 described boiler check valve (V) (1),
Sealing bag (1) has soft resinous bag thin slice (11,12),
By bonding described bag thin slice (11,12), except article storing mouth (1a) with installed the part of described boiler check valve (V), separate airtightly with the bag outside,
Described boiler check valve (V) is clamped by described bag thin slice (11,12), and the air flow line during with discharge is that the upstream extremity of benchmark is positioned at described article storing portion (2), and the downstream end of same benchmark is positioned at outside the described article storing portion (2),
It is bonding with the inner face of described the opposing party's side group plinth thin slice (32) that side in opposite directions among the part that upstream in the opposing party's side group plinth thin slice (32) of described boiler check valve (V) is distolateral and the described bag thin slice (11,12),
Air-flow in one side's side group plinth thin slice (31) of described boiler check valve (V) exposes by the space that can take in article in the described relatively article storing portion of portion (31a) (2),
Form transverse seal (13) by bonding described bag thin slice (11,12),
This transverse seal (13) forms in the mode of crossing described boiler check valve (V) at Width,
In addition, form vertical strip of paper used for sealing (14) by bonding described bag thin slice (11,12),
This vertical strip of paper used for sealing (14) is the direction that intersects with described transverse seal (13), and the air flow line during with the discharge in the described boiler check valve (V) to be benchmark extend to the upstream side of this transverse seal (14),
(14) two on described vertical strip of paper used for sealing is that one group of ground forms, clips described boiler check valve (V) and separates width than the wideer interval of width dimensions of this boiler check valve (V),
Air flow line during with the discharge in the described boiler check valve (V) is benchmark, the upstream extremity (141) of this vertical strip of paper used for sealing (14), with the air-flow of described side's side group plinth thin slice (31) by portion (31a) in by described transverse seal (13) regulation, the lower end (31a1) of the part passed through of air is compared in fact, is positioned at upstream side.
6. sealing bag according to claim 5 is characterized in that, the downstream end of boiler check valve (V) is positioned at the position than the more close described article storing portion of the ora terminalis of described sealing bag (1) (2).
7. the manufacture method according to each described boiler check valve in the claim 1 ~ 4 is characterized in that, as described basic thin slice (31,32) and valve body thin slice (4), uses the long size thin slice that is supplied to continuously at length direction,
Constitute described one group each valve body thin slice (4a, 4b) and supplied with by a long size thin slice, blocked into two at Width then, overlapping with described side's side group plinth thin slice (31) afterwards.
8. the manufacture method of a sealing bag is the manufacture method that the sealing bag (1) of boiler check valve (V) has been installed, it is characterized in that,
Described boiler check valve (V) has soft resinous basic thin slice (31,32) and many valve body thin slices (4),
Side's side group plinth thin slice (31) among the described basic thin slice (31,32) has permeability to air at whole,
Described basic thin slice (31,32) arranges opposite to each other in table back of the body direction,
Among described many valve body thin slices (4), the air flow line when discharging is baseline configuration at the upstream side valve body thin slice (4a) of upstream side and at least two of downstream valve body thin slice (4b) that are configured in the downstream of same benchmark is one group,
All described relatively at least side's side group plinth thin slice (31) is bonding to constitute described one group each valve body thin slice (4a, 4b),
Described bonding air flow line when discharging so that described each valve body thin slice (4a, 4b) is described relatively becomes series connection and both sides carry out in the nonoverlapping mode of table back of the body direction,
Upstream extremity (4a1) side that is bonded in of the described relatively side's side group plinth thin slice (31) of described upstream side valve body thin slice (4a) forms, and downstream end (4a2) side can move relative to described basic thin slice (31,32),
Described downstream end (4b2) side that is bonded in of described downstream valve body thin slice (4b) forms, and upstream extremity (4b1) side can move relative to described basic thin slice (31,32),
Among described each valve body thin slice (4a, 4b), each end (4a2,4b1) of that side that can move relative to described basic thin slice (31,32), the opposing party's side group plinth thin slice (32) can tight joint relatively,
Perhaps, relatively can tight joint with described the opposing party's side group plinth thin slice (32) valve body thin slice (4) bonding, that constitute outside the described one group valve body thin slice, in this boiler check valve,
As bag thin slice (11,12), use the soft resinous long size thin slice that is supplied to continuously at length direction,
The manufacture method of sealing bag has:
To the operation that sandwiches described boiler check valve (V) between described each bag thin slice (11,12);
By bonding described bag thin slice (11,12), form the operation of transverse seal (13) in the mode of crossing described boiler check valve (V) at Width; With
By bonding described bag thin slice (11,12), form the operation of vertical strip of paper used for sealing (14);
The direction of the vertical strip of paper used for sealing (14) that in described operation, forms for intersecting with described transverse seal (13), and the air flow line during with the discharge in the described boiler check valve (V) to be benchmark extend to the upstream side of this transverse seal (14),
And (14) two on described vertical strip of paper used for sealing is that one group of ground forms, clip described boiler check valve (V) and separate width than the wideer interval of width dimensions of this boiler check valve (V),
Air flow line during with the discharge in the described boiler check valve (V) is benchmark, the upstream extremity (141) of this vertical strip of paper used for sealing (14), with the air-flow of described side's side group plinth thin slice (31) by portion (31a) in by described transverse seal (13) regulation, the lower end (31a1) of the part passed through of air is compared in fact, is positioned at upstream side.
CN2010800455628A 2009-10-30 2010-03-18 Check valve, sealing bag, and production method for both Active CN102548858B (en)

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JP4436925B1 (en) 2010-03-24
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JP5433873B2 (en) 2014-03-05
CN102548858A (en) 2012-07-04

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