US20090028468A1 - Structure of air passage of sealable bag, sealable bag, and method of manufacturing the sealable bag - Google Patents

Structure of air passage of sealable bag, sealable bag, and method of manufacturing the sealable bag Download PDF

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Publication number
US20090028468A1
US20090028468A1 US11/658,893 US65889305A US2009028468A1 US 20090028468 A1 US20090028468 A1 US 20090028468A1 US 65889305 A US65889305 A US 65889305A US 2009028468 A1 US2009028468 A1 US 2009028468A1
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United States
Prior art keywords
bag
sealable
air
sheet
connecting part
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Abandoned
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US11/658,893
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English (en)
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Mikio Tanaka
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Individual
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Individual
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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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D31/145—Valve bags, i.e. with valves for filling the filling port being provided in a flat upper sealing-edge
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the present invention relates to a sealable bag that can be hermetically sealed thereinside.
  • Patent Document 1 Japanese Laid-Open Patent Application No. 2004-531435
  • a sealable bag has conventionally been used, wherein a sealable zone can be hermetically sealed and is connected to the outside of the bag in order to be able to discharge air or other various gasses in the zone to outside the bag then maintain the discharged state, or in order to fill the zone with air or other various gasses then maintain the charged state, and a flow of air in one direction is allowed and flow of air in the other direction is prevented when air and gas are discharged or filled as mentioned above.
  • a compression bag 101 comprising a bag having a sealable zone 102 configured by flexible resin sheets adhered together, for example, by heat-sealing in required locations to form a space confined by the sheets, allowing air and gas in the sealable zone 102 to discharge to the outside of the bag then maintain the discharged state.
  • the compression bag 101 is provided with an opening 103 to take an item M in and out of the sealable zone 102 .
  • the opening 103 is also provided with a closing means 104 such as a slide fastener for closing the opening 103 .
  • FIG. 7 Such a bag is illustrated in FIG. 7 as compression bag 101 .
  • an intermediate sheet 106 is inserted between two opposing sheets 102 a and 102 b , to form a check valve 105 with a space for air discharging passage between the bag sheets 102 a , 102 b where the intermediate sheet 106 is layered.
  • This check valve 105 functions to check air by close contact of the bag sheets 102 a , 102 b and the intermediate sheet 106 .
  • this compression bag 101 is initially formed with said check valve 105 together, an advantage is a single series of manufacturing processes of the compression bag, compared to a conventional series of processes of providing a check valve of a separately formed member from the bag body, with the bag body afterward.
  • the intermediate sheet 106 in the compression bag 101 is simply placed between the bag sheets 102 a and 102 b . Therefore, if the bag sheets 102 a , 102 b or the intermediate sheet 106 rupture, a leak will occur, and checking effects are incompletely done and difficult to maintain the sealable zone 102 in a deaerated state.
  • the present invention aims to provide a structure of an air passage of a sealable bag, a sealable bag, and a method of manufacturing a sealable bag, wherein a simple series of manufacturing processes and cost reduction can be achieved, and the sealable zone can be maintained in an airtight state more reliably compared to conventional bags.
  • a first aspect of the present invention provides a structure of an air passage of a sealable bag used for a sealable bag ( 1 ) in which a sealable zone ( 2 ) can be hermetically sealed, and the sealable zone ( 2 ) is connected to the outside of the bag in order to be able to discharge air and gas in the zone ( 2 ) to outside the bag then maintain the discharged state, or in order to be able to fill the zone ( 2 ) with air and gas then maintain the charged state.
  • An inner connecting part ( 3 a ) leading to the sealable zone ( 2 ) and an outer connecting part ( 3 b ) leading to the outside of the bag are provided thereby allowing a flow of air in one direction while preventing in the other direction when air and gas are discharged or filled as mentioned above.
  • Bag sheets ( 11 , 12 ) and a valve body sheet ( 31 ) that are made of resin and thus flexible are used.
  • the bag sheets ( 11 , 12 ) is placed facing each other, and the valve body sheet ( 31 ) is layered between the bag sheets ( 11 , 12 ) and has at least a front piece ( 31 a ) and a rear piece ( 31 b ) that are overlapped.
  • An air passing space ( 3 x ) is formed between the front bag sheet ( 11 ) and the front piece ( 31 a ), as well as between the rear bag sheet ( 12 ) and the rear piece ( 31 b ) in a manner to be able to pass and shut off air and gas, while a dead-end space ( 3 y ) is formed between the front piece ( 31 a ) and the rear piece ( 31 b ).
  • An inner connecting part ( 3 a ) that is provided at least at one part between the sealable zone ( 2 ) and air passage ( 3 ) allows air and gas pass between them.
  • An outer connecting part ( 3 b ) that is provided at least at one part between the air passage ( 3 ) and the outside of the bag allows air and gas pass between them.
  • a horizontal flowinging section ( 3 c ) is provided between the inner connecting part ( 3 a ) and the outer connecting part ( 3 b ) to pass a flow of air via the air passing space ( 3 x ).
  • the valve sheet ( 31 ) based on the direction of the flow of air through the air passage 3 , one side of the dead-end space ( 3 y ) is closed by the portion where the front piece ( 31 a ) and the rear piece ( 31 b ) are joined together, while the other side of the dead-end space ( 3 y ) is opened by the front piece ( 31 a ) and the rear piece ( 31 b ) separated from each other.
  • a second aspect of the present invention according to Claim 2 provides a structure of an air passage of a sealable bag according to Claim 1 , wherein the valve body sheet ( 31 ) is configured by folding one sheet; one side of the valve body sheet ( 31 ) sandwiching a folding portion ( 31 c ) running in the longitudinal direction is the front piece ( 31 a ), and the other side thereof is the rear piece ( 31 b ); and part of the folding part ( 31 c ) is disposed in the outer connecting part ( 3 b ).
  • a third aspect of the present invention according to Claim 3 provides a structure of an air passage of a sealable bag according to Claim 1 , wherein the valve body sheet 31 is formed by folding one sheet; one side of the valve body sheet ( 31 ) sandwiching a folding portion ( 31 c ) running in the longitudinal direction is the front piece ( 31 a ), and the other side thereof is the rear piece ( 31 b ); and part of the folding part ( 31 c ) is disposed in the outer connecting part ( 3 b ).
  • a fourth aspect of the present invention according to Claim 4 provides a structure of an air passage of a sealable bag according to any of Claims 1 to 3 , wherein a contacting surface ( 31 d ) of the valve body sheet ( 31 ) contacting to each bag sheet ( 11 , 12 ), is provided with weak adhesion.
  • a fifth aspect of the present invention according to Claim 5 provides a sealable bag with bag sheets ( 11 , 12 ) and a valve body sheet ( 31 ) that are made of resin and thus flexible.
  • the bag comprises a sealable zone ( 2 ) that is formed between the front bag sheet ( 11 ) and can be hermetically sealed; and an air passage ( 3 ) formed in a manner to be along at least one side ( 2 a ) of the sealable zone ( 2 ).
  • the valve body sheet ( 31 ) that is disposed in the air passage ( 3 ) in a manner to be layered between the bag sheets ( 11 , 12 ) has at least a front piece ( 31 a ) and a rear piece ( 31 b ) that are overlapped.
  • An air passing space ( 3 x ) is formed between the front bag sheet ( 11 ) and the front piece ( 31 a ), as well as between the rear bag sheet ( 12 ) and the rear piece ( 31 b ) in a manner to be able to pass and shut off air and gas, while a dead-end space ( 3 y ) is formed between the front piece ( 31 a ) and the rear piece ( 31 b ).
  • An inner connecting part ( 3 a ) that is provided at least at one part between the sealable zone ( 2 ) and air passage ( 3 ) allows air and gas pass between them.
  • An outer connecting part ( 3 b ) that is provided at least at one part between the air passage ( 3 ) and the outside of the bag allows air and gas pass between them.
  • a horizontal flowinging section ( 3 c ) is provided between the inner connecting part ( 3 a ) and the outer connecting part ( 3 b ) to pass a flow of air via the air passing space ( 3 x ).
  • the valve sheet ( 31 ) based on the direction of the flow of air through the air passage 3 , one side of the dead-end space ( 3 y ) is closed by the portion where front piece ( 31 a ) and the rear piece ( 31 b ) are joined together, while the other side of the dead-end space ( 3 y ) is opened by the front piece ( 31 a ) and the rear piece ( 31 b ) separated from each other.
  • a sixth aspect of the present invention according to Claim 6 provides a sealable bag according to Claim 5 , wherein the valve body sheet ( 31 ) is configured by folding one sheet; one side of the valve body sheet ( 31 ) sandwiching a folding portion ( 31 c ) running in the longitudinal direction is the front piece ( 31 a ), and the other side thereof is the rear piece ( 31 ); and part of the folding part ( 31 c ) is disposed in the inner connecting part ( 3 a )
  • a seventh aspect of the present invention according to Claim 7 provides a sealable bag according to Claim 5 , wherein the valve body sheet ( 31 ) is configured by folding one sheet; one side of the valve body sheet ( 31 ) sandwiching a folding portion ( 31 c ) running in the longitudinal direction is the front piece ( 31 a ), and the other side thereof is the rear piece ( 31 ); and part of the folding part ( 31 c ) is disposed in the outer connecting part ( 3 b ).
  • a eighth aspect of the present invention according to Claim 8 provides a sealable bag according to any of Claims 5 to 7 , wherein the sealable zone ( 2 ) is a space defined by a sealable zone defining seal ( 14 ) that extends laterally and is a portion where at least said bag sheets ( 11 , 12 ) are adhered together, and defined by side seals ( 16 ) that defines the left and right sides of the sealable bag ( 1 ), and the space is above the sealable zone defining seal ( 14 ).
  • the air passage ( 3 ) is a space defined by the sealable zone defining seal ( 14 ), bag side seals ( 16 ), and a bottom seal ( 15 ) that is a portion where at least said beg sheets ( 11 , 12 ) are adhered together and defines the lower end of the sealable bag ( 1 ), and the space is below the sealable zone defining seal ( 14 ).
  • the sealable zone dividing seal ( 14 ) is not provided in said inner connecting part ( 3 a ); and the bottom seal ( 15 ) or the bag side seal ( 16 ) is not provided in said outer connecting part ( 3 b ).
  • the inner connecting part ( 3 a ) and the outer connecting part ( 3 b ) are not provided in a position where the two vertically coincide with each other.
  • a ninth aspect of the present invention according to Claim 9 provides a sealable bag according to any of Claims 5 to 8 , wherein a spacer member 32 is disposed between the front piece ( 31 a ) and the rear piece ( 31 b ) in a manner to be sandwiched by the pieces.
  • a tenth aspect of the present invention according to Claim 10 provides a sealable bag according to Claims 9 , wherein the interval spacer member ( 32 ) is selected among a filament substance, unwoven fabrics, nets, woven fabrics, paper, and resin sheet without breathability.
  • An eleventh aspect of the present invention according to Claim 11 provides a method of manufacturing a sealable bag ( 1 ) in which a sealable zone ( 2 ) can be hermetically sealed and discharge air and gas in the sealable zone ( 2 ) to the outside of the bag then maintain the discharged state, or fill the sealable zone ( 2 ) with air and gas then maintain the charged state, and an air passage ( 3 ) is provided adjacent to the sealable zone ( 2 ) to communicating the sealable zone ( 2 ) to outside the bag to be able to allow air and gas pass through.
  • the air passage ( 3 ) includes an inner connecting part ( 3 a ) leading to the sealable zone ( 2 ) and an outer connecting part ( 3 b ) leading to the outside the bag, and allows a flow of air in one direction while preventing in another direction when air and gas are discharged or filled as mentioned above.
  • At least bag sheets ( 11 , 12 ) and a valve body sheet ( 31 ) that are made of resin and thus flexible, and continuously supplied in the longitudinal direction, are used.
  • the valve body sheet ( 31 ) is supplied after having been folded in two along a folding portion ( 31 c ) running in the longitudinal direction. Then, in the double-folded state, its vertical dimension being a dimension in the widthwise direction is smaller than the bag sheets ( 11 , 12 ).
  • the manufacturing method comprising the following steps.
  • a process is that the valve body sheet ( 31 ) is disposed in a manner to be layered between the front bag sheet ( 11 ) and the rear bag sheet ( 12 ) in the location where the air passage ( 3 ) is formed.
  • a process is that a sealable zone defining seal ( 14 ) and a bottom seal ( 15 ) that are along the longitudinal direction of the valve body sheet ( 31 ), and bag side seals ( 16 ) that cross in the widthwise direction of each of the sheets, are provided.
  • a process is that the sheets ( 11 , 12 , 31 ) are cut in a manner to divide the bag side seals ( 16 ) in two
  • FIG. 1 is a plan view of a compression bag of an embodiment of the invention of the present application.
  • FIG. 2 is an exploded perspective view to show the structure of a compression bag of an embodiment of the invention of the present application.
  • FIG. 3 (A) is an end view of the core part seen in the arrowed direction A-A in FIG. 2 to indicate flow of air in the air passage
  • FIG. 3(B) an end view of the core part seen in the arrowed direction B-B in FIG. 2 to indicate the flow of air in the air passage
  • FIG. 3(C) an end view of the core part seen in the arrowed direction CC in FIG. 3(A) to show an inner connecting part
  • FIG. 3(D) an end view of the core part seen in the arrowed direction D-D in FIG. 3(B) to show an outer connecting part.
  • FIGS. 4(A) to 4(C) are plan views of the core part of different embodiments of a compression bag in which a configuration of the air passage is changed.
  • FIG. 5 is a plan view showing another embodiment of a compression bag in which a configuration of the air passage is changed.
  • FIG. 6(A) is a plan view showing an embodiment of a compression bag in which a spacer member is disposed in the air passage
  • FIG. 6(B) an end view of the core part seen in the arrowed direction E-E of FIG. 6(A)
  • FIG. 6(C) an end view of the core part when a sheet-shaped material is used for the spacer member.
  • FIG. 7 is an exploded perspective view to show the structure of a conventional compression bag.
  • rectangular bag sheets (a front bag sheet 11 and a rear bag sheet 12 ) that are vertically elongated in the figures, and a rectangular valve body sheet 31 that is horizontally elongated in the figures and smaller than the bag sheets 11 and 12 in height are used as structural members.
  • Longitudinally continuous long sheets of flexible nature are used for the sheets 11 , 12 , 31 , which are adhered at certain positions by, for example, heat-sealing as described later and then cut into a bag with a partitioned sealable zone 2 and air passage 3 .
  • a resin sheet is used for each sheet 11 , 12 , 31 .
  • resin sheets that include a laminate of multiple resin films such as multiple polyethylene films, or a laminate of polyethylene film and nylon film.
  • a laminate sheet of multiple resin films is generally more common to be used than a sheet made of uniform material. Since polyethylene film is heat-sealable, while nylon film is not, polyethylene films of a resin sheet need to face each other for a later described heat-sealing operation.
  • the bag sheets 11 and 12 facing each other constitute the exterior of the compression bag 1 .
  • the sealable zone 2 is formed between the front bag sheet 11 and the rear bag sheet 12 providing a space to store an item M.
  • the air passage 3 has an air passing space 3 x that communicates from the sealable zone 2 to the outside of the bag so that the deaerating gas (air) passes through from the interior space of the sealable zone 2 to the outside of the bag (See FIGS. 3(A) and 3(C) ). Thereby, while air in the sealable zone 2 is discharged to the outside of the bag, the air passage 3 connects the sealable zone 2 to the outside of the bag for air passage for the purpose of deaeration.
  • the sealable zone 2 of the present embodiment is defined by a sealable zone defining seal 14 that extends laterally shown in FIG. 1 , and by bag side seals 16 that extend vertically in the figure and define the left and right sides of the sealable bag 1 .
  • the sealable zone defining seal 14 is a portion where the bag sheets 11 and 12 and the valve body sheet 31 are adhered together.
  • the opening 1 a is provided with a closing means 4 that hermetically closes the opening 1 a , whereby the sealable zone 2 can be kept in an airtight state.
  • the closing means 4 of the embodiment is a resin fastener comprising a projected portion on one of the bag sheets 11 and 12 and a recessed portion on the other, with the projected and recessed portions being engaged to close the opening 1 a .
  • the closing means 4 is not limited to this, and various types of closing means may be used.
  • the opening 1 a may be adhered, for example, by heat-sealing not to open after the item M has been taken in the sealable zone 2 through the opening 1 a .
  • an opening 1 a need not to be initially provided, and only the air passage 3 functions as a space where air can pass through.
  • the air passage 3 of the embodiment is a space defined by the sealable zone defining seal 14 , bag side seals 16 , and a bottom seal 15 that extends laterally in the figure and defines the lower end of the sealable bag 1 , and the space is below the sealable zone defining seal 14 in the figure. That is, the air passage 3 is formed along the side of a sealable zone 2 that is a square in a plan view.
  • sealable zone 2 when the sealable zone 2 is pressed to discharge air from the sealable zone 2 to outside the compression bag 1 for deaeration, relatively physically weak persons such as children and the elderly can easily discharge air without much resistance. Further, no rupture of the sealable zone 2 is anticipated.
  • the sealable zone defining seal 14 is partially provided between the sealable zone 2 and the air passage 3 . In the present embodiment, there is separation between the left end of the sealable zone defining seal 14 and the left side seal 16 .
  • the separate part is an inner connecting part 3 a .
  • the bottom seal 15 is partially provided between the air passage 3 and the outside of the bag. In the present embodiment, there is separation between the right end of the bottom seal 15 and the right side seal 16 .
  • the separate part is an outer connecting part 3 b .
  • each space of the sealable zone 2 and the air passage 3 (air passing space 3 x ) can be connected to the outside of the bag through the inner connecting part 3 a and the outer connecting part 3 b , thereby enabling discharge of gas (air) in the sealable zone 2 to the outside of the bag.
  • the area between the inner connecting part 3 a and the outer connecting part 3 b is a horizontal flowing section 3 c .
  • the horizontal flowing section 3 c is provided so that flow of air passes in the direction along the side 2 a of the sealable zone 2 , and, as described later, has a length along the flow of air direction long enough to reliably close the air passing space 3 x by close contact of the bag sheet 11 and the valve body sheet 31 , as well as the bag sheet 12 and the valve body sheet 13 .
  • the compression bag 1 of the present embodiment is provided with the inner connecting part 3 a on the lateral upper left end of the air passage 3 , the outer connecting part 3 b on the lateral lower right end of the air passage 3 , and the horizontal flowing section 3 c in a manner to extend laterally.
  • the inner connecting part 3 a and the outer connecting part 3 b are not provided in a position where the two vertically coincide with each other in the present embodiment.
  • FIG. 3(A) shows that, because of the structure of the air passage in such a configuration, flow of air during deaeration passes from the inner connecting part 3 a into the horizontal flowing section 3 c , changing directions from downward to the right on the left side of the horizontal flowing section 3 c , passing through the horizontal flowing section 3 c from left to right, changing directions from right to downward on the right side of the horizontal flowing section 3 c , and going outside the bag through the outer connecting part 3 b . Meanwhile, when the air passage 3 is closed, the front piece 31 a and the front bag sheet 11 contact closely, as well as the rear piece 31 b and the rear bag sheet 12 contact closely, over the entire area of the horizontal flowing section 3 c , and the sealable zone 2 can be securely maintained in an airtight state.
  • the positional relations among said inner connecting part 3 a , outer connecting part 3 b and horizontal flowing section 3 c are not limited to one in the present embodiment, but various changes can be applied.
  • the outer connecting part 3 b may be vertically positioned at the right end side of the horizontal flowing section 3 c in the figure, so that air will be discharged out of the bag without changing the direction of flow of air.
  • a valve body sheet 31 which is not like the aforementioned continuous elongated sheet extending in the longitudinal direction, may be laterally provided only at part of the air passage 3 . That is, as shown in FIG.
  • valve body sheet which is not provided at the left end side of the compression bag 1 , and the inner connecting part 3 a and outer connecting part 3 b are vertically positioned in the figure not to change the direction of flow of air through the horizontal flowing section 3 c .
  • various configurations may be applied, such as one in which both or either of the inner connecting part 3 a and the outer connecting part 3 b is positioned at the center of the lateral direction, or one in which a plurality of the same are provided.
  • flow of air through the horizontal flowing section 3 c will be detoured with a set of detouring seals 17 formed by adhering sheets 11 , 12 , 31 in such a manner as to project from the sealable zone defining seal 14 and the bottom seal 15 into the air passage 3 .
  • a set of alternating seals that are almost diagonally formed toward the direction of the following flow of air passing from the inner connecting part 3 a to the outer connecting part 3 b for deaeration.
  • a valve body sheet 31 provided on the air passage 3 comprises at least a front piece 31 a and a rear piece 31 b , which are overlapped.
  • the valve body sheet 31 in the present embodiment is configured by folding one sheet in half along a folding portion 31 c . Passing and shutting off of air can be done between the front bag sheet 11 and the front piece 31 a , and between the rear bag sheet 12 c and the rear piece 31 b . When air passes therethrough, the air passing space 3 x is formed as shown in FIG. 3(C) .
  • the front piece 31 a and the rear piece 31 b have an opening against either the inner connecting part 3 a or outer connecting part 3 b respectively, while a dead-end space 3 y where flow of air is prevented between the connecting parts 3 a and 3 b is formed.
  • a description regarding the valve body sheet 31 is given below, referring to the surfaces facing each sheet 11 and 12 as a contacting surface 31 d and the surfaces where the front piece 31 a and rear piece 31 b are opposite to each other a separating surface 31 e.
  • the valve body sheet 31 in the present embodiment is configured, as shown in FIG. 2 , by folding along the folding portion 31 c , which is substantially positioned at the center of the sheet in the longitudinal direction.
  • the front piece 31 a is a portion above the folding portion 31 c in the figure, while the rear piece 31 b is a portion below the same in the figure.
  • part of the folding portion 31 c is disposed in the inner connecting part 3 a .
  • the valve body sheet 31 in the present embodiment is folded in two, multiple sheets may be used by overlapping each other. In this case, the front and rear pieces 31 a and 31 b need to be adhered at a portion corresponding to the folding portion 31 c.
  • the folding portion 31 c and the upper side of the bag sheets 11 and 12 is adhered together, except the portion of the inner connecting part 3 a , by a sealable zone defining seal 14
  • the lower side of the valve body sheet is adhered together, except the portion of the outer connecting part 3 b , by a bottom seal 15
  • the left and right sides of the valve body sheet are adhered together by side seals 16 .
  • the folding portion 31 c extends over the entire width of the valve body sheet 31 laterally, but where the folding portion 31 c actually exposes is only at the portion of the inner connecting part 3 a where the enclosing part defining seal 14 is not provided.
  • a further embodiment may be applied in which the valve body sheet does not include the folding portion 31 c except the portion that is disposed in the inner connecting part 3 a , thus leaving the front and rear pieces 31 a and 31 b separate, then the zone defining seal 14 is provided.
  • the present embodiment relates to a compression bag 1 for use by way of deaeration of a sealable zone 2 wherein part of the folding portion 31 c is disposed in the inner connecting part 3 a that is located on the upstream side of flow of air during deaeration.
  • part of the folding portion 31 c is in reverse position on the outer connecting part 3 b.
  • the folding portion 31 c of the valve body sheet 31 and the sealable zone defining seal 14 may be positioned identically, and the folding portion 31 c and the sealable zone defining seal 14 may be separated.
  • the folding portion 31 c is positioned lower than the sealable zone defining seal 14 in FIG. 1 , close contact between the front and rear bag sheets 11 and 12 partly supports checking effects in the air passage 3 .
  • the folding portion 31 c is positioned higher than the sealable zone defining seal 14 in FIG. 1 , the surplus portion of the valve body sheet 31 beyond the sealable zone defining seal 14 may hinder flow of air in the inner connecting part 3 a . Therefore, it is desirable for the folding seal 31 c and the sealable zone defining seal 14 to be positioned identically, as in the present embodiment.
  • the dead-end-space 3 y in the present embodiment is defined by the sealable zone defining seal 14 , folding portion 31 c , bottom seal 15 , and side seals 16 , and is a space with limited opening between the front and rear piece 31 a and 31 b in the outer connecting part 3 b .
  • the dead-end space 3 y is closed by the folding portion 31 c where the front and rear pieces 31 a and 31 b of a valve body sheet 31 are joined together in the inner connecting part 3 a located on the upstream side, while the dead-end space 3 y is opened by the front and rear pieces 31 a and 31 b that are separate from each other in the outer connecting part 3 b located on the downstream side.
  • the valve body sheet 31 is configured by folding one sheet in half along the folding portion 31 c , the valve body sheet can be easily formed with a dead-end space 3 y at lower manufacturing costs of the compression bag 1 .
  • said dead-end space 3 y strengthens checking effects in the air passage 3 due to the stagnation of air from the outer connecting part 3 b to the air passage in the horizontal flowing section 3 c .
  • another configuration other than the present embodiment may be applied.
  • an adhered portion 31 f is formed by adhering the front and rear pieces 31 a and 31 b at the lateral intermediate line of the air passage 3 , and then a dead-end space 3 y may be provided between the front and rear pieces 31 a and 31 b in the right side of the adhered portion 31 f in the figure.
  • the space between the front and rear pieces 31 a and 31 b is closed due to the folding portion 31 c .
  • flow of air F 1 in the normal direction in discharging air from the sealable zone 2 to outside the bag during deaeration is heading between the front bag sheet 11 and the front piece 31 a as well as between the rear bag sheet 12 and the rear piece 31 b , not between the front and rear sheets 31 a and 31 b . Then, as shown in FIG.
  • FIG. 3(C) is depicted to emphasize the vertical direction in the figure.
  • FIG. 3(D) is depicted to emphasize the vertical direction in the figure.
  • each sheet 11 , 12 , 31 for closing of the air passing space 3 x is achieved by the reduced pressure inside the sealable zone 2 during deaeration. That is, a pressure difference is generated between the outside of the bag (positive pressure) and the inside of the sealable zone 2 (negative pressure), producing a sucking force to draw the valve body sheet 31 toward the sealable zone 2 under negative pressure side.
  • the valve body sheet 31 Being made of flexible resin, the valve body sheet 31 easily changes its shape by the sucking force, then the front bag sheet 11 and the contacting surface 31 d of the front piece 31 a contact, as well as the rear bag sheet 12 and the contacting surface 31 d of the rear piece 31 b contact. Simultaneously, as shown in FIG.
  • the separating surface 31 e of the front and rear pieces 31 a and 31 b of the valve body sheet 31 has adhesion less closely compared to the contacting surface 31 d , making the front and rear pieces 31 a and 31 b easily separate from each other.
  • a resin film with adhesion inferior to the other resin films may be applied to the separating surface 31 e .
  • the separating surface 31 e may be formed rough on its surface with a pearskin finish, or may be coated with a coating material to improve its separation.
  • a spacer member 32 may be disposed between the separating surfaces 31 e .
  • the spacer member 32 is placed in the direction crossing the passage of flow of air through the air passage 3 .
  • the member in the form of filaments is used in a manner to be positioned parallel to the sealable zone defining seal 14 and bottom seal 15 .
  • a sheet-like material may be applicable.
  • thermoplastic resin fiber with heat-sealability such as polyester resin fiber. Natural fiber without heat-sealability, such as cotton may be employed.
  • sheet-like material to be used one with or without breathability may be employed, including unwoven fabrics, nets, and woven fabrics of thermoplastic resin with heat-sealability.
  • non-heat-sealable materials such as paper can be used as a sheet-like material.
  • one piece of filament is sandwiched between the front and rear pieces 31 a and 31 b as a spacer member 32 of the present embodiment, but a plurality of the spacer members 32 may be consecutively positioned.
  • the same can be applied in the case of a sheet-like material as shown in FIG. 6(C) .
  • the spacer member 32 does not matter whether it is adhered or to the separating surface 31 e of the valve body sheet 31 or not.
  • the position of the spacer member 32 in the air passage 3 it is acceptable as long as it is placed in the direction crossing the passage of flow of air through the air passage 3 .
  • the spacer member 32 is not limited to a continuous material of filament extending laterally, as shown in FIG. 6(A) , but a spacer member 32 intermittently pasted on the separating surface 31 e is also applicable.
  • a filament When a filament is used as a spacer member 32 as in the present embodiment, it is not necessary to feed a long spacer member 32 in parallel in the longitudinal direction against each sheet 11 , 12 , 31 before a process of layering a front bag sheet 11 , rear bag sheet 12 , and valve body sheet 31 in the manufacturing process described later. It can be supplied diagonally or perpendicularly by bending it, which is advantageous in terms of a layout of the manufacturing apparatus.
  • a material which exerts biasing to spread the interval between the inner surfaces 11 a , 12 a of the bag sheets 11 , 12 and the separating surface 31 e of the valve body sheet 31 may be used as a spacer member 32 .
  • a spacer member 32 when the spacer member 32 is in the form of a sheet, a urethane foam sheet with resiliency may be used.
  • the spacer member 32 in the form of a sheet folded in two may be used to exerting the biasing by separating a portion of the spacer member 32 from the other portion along the folding portion.
  • the spacer member 32 with a biasing ability can make the contacting surfaces 31 a of the valve body sheet 31 contact more closely, and closing the air passage area 3 a effectively, thus preventing a reverse flow of air in the air passage 3 effectively.
  • a resin sheet composing the contacting surface 31 d which is surfaces opposing to the bag sheets 11 , 12 , may be comprised of a material having strong adhesion superior to the other resin sheets, in other words, with a good blocking nature.
  • an inert liquid such as silicone oil may be provided on the contacting surface 31 d in amount not to hinder deaeration, thus making the valve body sheet 31 contact closely and prevent a reverse flow of air effectively in the air passage.
  • a valve body sheet 31 that can absorb liquid may be used with an inert liquid such as silicone oil soaked into the valve body sheet 31 for use. In this way, blocking nature can be improved by taking advantage of surface tension of the soaked liquid.
  • a continuous flexible sheet extending in the longitudinal direction is used for the bag sheets 11 , 12 and the valve body sheet 31 for manufacturing a compression bag 1 of this embodiment, and is supplied in succession to each manufacturing step for processing such as heat-sealing and cutting in sequence.
  • a closing member 4 is mounted by heat-sealing at the upper end, which forms an opening 1 a of the compression bag 1 in completion, in the figure of the front and rear bag sheets 11 and 12 .
  • the closing member 4 is a sliding fastener with a projected portion attached to one of the bag sheets 11 , 12 , and a recessed portion attached to the other.
  • the closing member 4 is also longitudinally continuous and supplied in succession to each manufacturing step as the sheets 11 , 12 , 31 are.
  • a valve body sheet 31 is placed between the front and rear bag sheets 11 and 12 .
  • a sealable zone defining seal 14 , bottom seal 15 , and side seals 16 are concurrently formed, and each sheet 11 , 12 , 31 is adhered together.
  • each sheet 11 , 12 , 31 , and the closing means 4 are cut in a manner to divide the side seal 16 equally to complete the compression bag 1 .
  • sheets 11 , 12 , 31 and a closing means 4 that are continuously extending in the longitudinal direction are used and supplied to each manufacturing step in succession for processing such as heat-sealing and cutting in sequence to complete a compression bag 1 one after another. Therefore, a conventional complicated manufacturing process in which a check valve of a separate component is incorporated into a compression bag 1 is eliminated, thereby realizing a relatively simple manufacturing method and reduction of manufacturing costs.
  • the invention of the present application provides the following excellent effects.
  • the aspect of the present application according to Claim 1 provides a structure of an air passage of a sealable bag in which an air passing space 3 x that enables passing and shutting off of air is formed between a front bag sheet 11 and a front piece 31 a , as well as between a rear bag sheet 12 and a rear piece 31 b while a dead-end space 3 y is formed between the front piece and rear pieces 31 a and 31 b , whereby air likely to flow back to the dead-end space 3 y is stagnated, and the pressure of this air makes contact more closely among the bag sheets 11 , 12 and the valve body sheet 31 than conventionally, thereby achieving strong checking effects.
  • the aspect of the present application according to Claims 2 and 3 provides, in addition to the effect above, a structure of an air passage of a sealable bag in which a valve body sheet 31 , being configured by folding one sheet, can be easily formed with a dead-end space 3 y at low manufacturing costs.
  • the aspect of the present application according to Claim 4 provides, in addition to the effect above, a structure of an air passage of a sealable bag in which, since a contacting surface 31 d of the valve body sheet 31 is provided with weak adhesion, the air passage 3 can be closed more effectively.
  • the aspect of the present application according to Claim 5 provides a sealable bag in which an air passing space 3 x that enables passing and shutting off of air is formed between a front bag sheet 11 and a front piece 31 a , as well as between a rear bag sheet 12 and a rear piece 31 b while a dead-end space 3 y is formed between the front piece and rear pieces 31 a and 31 b , whereby air likely to flow back to the dead-end space 3 y is stagnated, and the pressure of this air makes contact more closely among the bag sheets 11 , 12 and the valve body sheet 31 than conventionally, thereby achieving strong checking effects.
  • the aspect of the present application according to Claims 6 and 7 provides, in addition to the effect according to Claim 5 , a sealable bag in which a valve body sheet 31 , being configured by folding one sheet, can be easily formed with a dead-end space 3 y at low manufacturing costs.
  • the aspect of the present application according to Claim 8 provides, in addition to the effect according to any of Claims 5 to 7 , a sealable bag in which an inner connecting part 3 a and the outer connecting part 3 b are not provided in a position where the two vertically coincide with each other, and, when the air passage 3 is closed, the front piece 31 a and the front bag sheet 11 contact closely, as well as the rear piece 31 b and the rear bag sheet 12 contact closely, over the entire area of the horizontal flowing section 3 c , whereby the sealable zone 2 can be securely maintained in an airtight state.
  • the aspect of the present application according to Claim 9 and 10 provides, in addition to the effect according to any of Claims 5 to 8 , a sealable bag in which a spacer member 32 is disposed between the front and rear pieces 31 a and 31 b in a manner to be sandwiched by them, and the bag sheets 11 , 12 and the valve body sheet 31 are pressed by the spacer member 32 , thereby making contact more closely among the bag sheets 11 , 12 and the valve body sheet 31 , and preventing a reverse flow of air in the air passage 3 effectively, and maintaining the sealable zone 2 in a deaerated state for a long period of time.
  • the aspect of the present application according to Claim 11 provides a method of manufacturing a sealable bag in which sheets 11 , 12 , 31 and a closing means 4 that are continuously extending in the longitudinal direction are used and supplied to each manufacturing step in succession for processing such as heat-sealing and cutting in sequence to complete a compression bag 1 one after another, whereby a conventional complicated manufacturing process in which a check valve of a separate component is incorporated into a compression bag 1 is eliminated, thereby realizing a relatively simple manufacturing method and reduction of manufacturing costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
US11/658,893 2005-07-01 2005-07-01 Structure of air passage of sealable bag, sealable bag, and method of manufacturing the sealable bag Abandoned US20090028468A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/012179 WO2007004273A1 (fr) 2005-07-01 2005-07-01 Structure de canal d’ecoulement d’air d’un sac hermetique, sac hermetique et procede de fabrication d’un sac hermetique

Publications (1)

Publication Number Publication Date
US20090028468A1 true US20090028468A1 (en) 2009-01-29

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US11/658,893 Abandoned US20090028468A1 (en) 2005-07-01 2005-07-01 Structure of air passage of sealable bag, sealable bag, and method of manufacturing the sealable bag

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US (1) US20090028468A1 (fr)
EP (1) EP1955960A1 (fr)
WO (1) WO2007004273A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110103720A1 (en) * 2008-05-29 2011-05-05 Hydrus B.V. Method of manufacturing a bag and a bag
US20110110613A1 (en) * 2008-07-24 2011-05-12 Yushin Co., Ltd. Flexible package bag provided with one-way functioning nozzle and liquid material-filled packaging structure
US20110266191A1 (en) * 2009-01-05 2011-11-03 Hee Bong Im Air-filled packaging product
US8167489B2 (en) * 2010-06-25 2012-05-01 Sugiyama-Gen Co., Ltd. Packaging bag for secondary packaging configured to transport infectious substances

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JP4673929B1 (ja) * 2010-06-17 2011-04-20 有限会社田中テクニカル シート製の逆止弁構造
KR101162030B1 (ko) 2012-04-17 2012-07-03 오계술 공기충전형 포장재

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US5540500A (en) * 1994-04-25 1996-07-30 Nichimen Corporation Compressive sealed bag for compressible articles such as clothing and the same
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US6116781A (en) * 1999-08-13 2000-09-12 New West Products, Inc. Storage bag with one-way air valve
US20020015541A1 (en) * 1994-03-03 2002-02-07 Alain Delsahut Sealed enclosure, method for the manufacture thereof, and method of packaging a beverage in said enclosure
US6357915B2 (en) * 1999-08-13 2002-03-19 New West Products, Inc. Storage bag with one-way air valve
US20020090151A1 (en) * 1999-08-13 2002-07-11 Skeens Janet L. Storage bag with one-way air valve
US6729473B2 (en) * 2002-06-20 2004-05-04 Cti Industries Corporation Air-evacuable bag with double-layered valve film and method for manufacturing same
US6814491B1 (en) * 2003-03-27 2004-11-09 Wen-Ching Tang Sealing bag
US20060045392A1 (en) * 2004-08-16 2006-03-02 Roger Bannister Transversely sealed container
US7448803B2 (en) * 2004-01-10 2008-11-11 Mikio Tanaka Process for producing compression bag and compression bag

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JP3590609B2 (ja) * 2001-12-10 2004-11-17 株式会社柏原製袋 気体密封袋

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US3430842A (en) * 1966-09-22 1969-03-04 Gennosuke Yamaguchi Valved bag
US20020015541A1 (en) * 1994-03-03 2002-02-07 Alain Delsahut Sealed enclosure, method for the manufacture thereof, and method of packaging a beverage in said enclosure
US5540500A (en) * 1994-04-25 1996-07-30 Nichimen Corporation Compressive sealed bag for compressible articles such as clothing and the same
US5701996A (en) * 1994-05-17 1997-12-30 Idemitsu Petrochemical Co., Ltd. Snap-fastener bag
US5447235A (en) * 1994-07-18 1995-09-05 Air Packaging Technologies, Inc. Bag with squeeze valve and method for packaging an article therein
US6116781A (en) * 1999-08-13 2000-09-12 New West Products, Inc. Storage bag with one-way air valve
US6357915B2 (en) * 1999-08-13 2002-03-19 New West Products, Inc. Storage bag with one-way air valve
US20020090151A1 (en) * 1999-08-13 2002-07-11 Skeens Janet L. Storage bag with one-way air valve
US6729473B2 (en) * 2002-06-20 2004-05-04 Cti Industries Corporation Air-evacuable bag with double-layered valve film and method for manufacturing same
US6814491B1 (en) * 2003-03-27 2004-11-09 Wen-Ching Tang Sealing bag
US7448803B2 (en) * 2004-01-10 2008-11-11 Mikio Tanaka Process for producing compression bag and compression bag
US20060045392A1 (en) * 2004-08-16 2006-03-02 Roger Bannister Transversely sealed container

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110103720A1 (en) * 2008-05-29 2011-05-05 Hydrus B.V. Method of manufacturing a bag and a bag
US20110110613A1 (en) * 2008-07-24 2011-05-12 Yushin Co., Ltd. Flexible package bag provided with one-way functioning nozzle and liquid material-filled packaging structure
US20110266191A1 (en) * 2009-01-05 2011-11-03 Hee Bong Im Air-filled packaging product
US8167489B2 (en) * 2010-06-25 2012-05-01 Sugiyama-Gen Co., Ltd. Packaging bag for secondary packaging configured to transport infectious substances

Also Published As

Publication number Publication date
EP1955960A1 (fr) 2008-08-13
WO2007004273A1 (fr) 2007-01-11

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