Abstract: A check valve includes two valve films of synthetic resin that put one on the other, and an air passage defined by two seal sections formed by means of bonding parts of the valve films together. A compression bag and air compression bag equipped with this check valve are also provided. An inlet of the air passage is defined by a straight line linking the respective upward flow side end sections of the seal sections. An outlet of the air passage is defined by a straight line linking the respective downward flow side end sections of the seal sections. In at least one of the seal sections, the valve films are not bonded together at the line of extension of the seal section, situated on the downward flow side of the downward flow side end section of the seal section.

Abstract: A deaeration valve comprising two valve films 11, 12 of synthetic resin that put one on the other, having an air passage 2 defined by two seal sections 21, 22 formed by means of bonding parts of the valve films together, wherein the inlet 2a of the air passage 2 is defined by the straight line linking the respective upward flow side end sections 21a, 221a of the seal sections 21, 22; the outlet 2b of the air passage is defined by the straight line linking the respective downward flow side end sections 21b, 223b of the seal sections 21, 22; and in at least one of the seal sections 21, 22, the valve films 11, 12 are not bonded together at the line of extension 21c, 223c of the seal section 21, 22, situated on the downward flow side of the downward flow side end section 21b, 223b of the seal section 21, 22.

Abstract: The flexible bag includes overlaying first and second sidewalls that provide an internal volume that can be accessed via an opening. To evacuate air from the internal volume after the open top edge has been closed, the bag includes a one-way valve element attached to the first sidewall. The bag is configured to prevent objects from clogging the valve element during evacuation. In one embodiment, the bag may include a plurality of ridges formed along the inner surface of at least one sidewall that can maintain separation of the sidewalls and contents from the valve element. In another aspect, the valve element is beneficially located at a top corner of the bag where the valve element is spaced apart from those locations in the bag where contents are likely to collect.

Abstract: An air valve for a poly bag that permits the escape of air from the bag as it is filled by a filling tube. The air valve consists of a plurality of slitted openings in one top corner of the bag and a valve flap mounted in the poly bag near the slitted openings that closes and seals the openings as filling material engages and moves the flap.

Abstract: A storage bag for food products with a venting structure to expel excess air trapped inside the bag after the bag has been closed or sealed. After the excess air is removed, the venting structure is covered and sealed to prevent air from re-entering the bag or other objects from entering the bag.

Abstract: A plastic valve bag construction is provided having structure enabling positive closure of the outer opening of the valve, once filling of the bag has been completed. Closure is provided by the placement of adhesive on one or more regions adjacent the outer opening of the valve which one or more regions of adhesive are covered by a removable shield. A method for making such plastic valve bags is also disclosed.

Abstract: A plastic valve bag construction is provided having structure enabling positive closure of the outer opening of the valve, once filling of the bag has been completed. Closure is provided by the placement of adhesive on one or more regions adjacent the outer opening of the valve which one or more regions of adhesive are covered by a removable shield. A method for making such plastic valve bags is also disclosed.

Abstract: The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end extending exteriorily from the bag body. A valve protection member is secured to the second end.

Abstract: The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end secured to the bag body. A valve protection member is secured to the second end.

Abstract: The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end extending exteriorily from the bag body. A valve protection member is secured to the second end.

Abstract: A method for closing a valved sack having one or more layers of flexible material. The valved sack has a filling opening which is closed after filling the valved sack. The filling opening is formed by opposite layers of material, which when closing the valved sack, are on top of one another and are undetachably joined. The method involves closing the filling opening by joining the layers of material which are on top of one another by plastic deformation without applying heat. A valved sack formed by the method is also described.

Abstract: A valve bag has a sleeve that includes a butt seam formed by abutting opposed edges of a paper sheet and securing the abutting edges. A strip of tape may be used to secure the abutting edges. The interior surface of the sleeve and the tape are both constructed from a sealable material. A tight seal is achieved when the sleeve is sealed.

Abstract: A container is used to store fine particles such as bakery flour in a sealed packaging, wherein air in the container, such as air entrapped during filling, can be expelled through compression without loss of fine particles. The container includes a main body forming a pouch which terminates in a principal opening and is fabricated from an imperforate flexible material such as clear plastic film. A sealing mechanism is attached to the pouch for sealing the pouch, and a multiplicity of microscopic pores extend through the flexible material. Each pore has a dimension ranging from 10 to 150 .mu.m sufficient to permit air to exit through an exit port, but to prevent the fine particles from escaping through the pores. At least a portion of the pouch material has an anti-slip surface with an external coefficient of friction ranging from about 0.4 to 0.5.

Abstract: The present invention is a valve bag with a valve assembly that provides closure during and after the filling process, thus preventing unwanted spilling and sifting of the valve bag contents through the valve opening during transporting or moving the bag to a location in which the valve is permanently sealed, and methods for making and filling such a bag. An automatic self-closing valve assembly also is provide that requires no subsequent sealing after the filling process.

Abstract: A valve assembly for a satchel end tubular bag comprising four members. Two members form an upper sub-assembly and two other members for a lower sub-assembly. The valve assembly is adhesively secured at a corner tuck of the satchel end within the paper plies of the bag. The upper sub-assembly is wrapped within the lower sub-assembly and forms a passageway for a product injection nozzle to be inserted therethrough for introducing product into the bag. The members of the sub-assemblies are laterally offset and each sub-assembly has said members both laterally and longitudinally offset, or stepped, to achieve strength and a sift-proof construction. Extensions of one of the members of each sub-assembly extend bag-inwardly and comprise a thin pliable material, whereby to provide improved self-closure as the product fills the bag. Both improved filling and sealing are achieved.

Abstract: A device and method for giving proper shape to a bag for display purposes comprising an inflatable member which is placed inside the bag and then inflated to cause the bag move outwardly to its full and expanded size.

Abstract: A snap-fastener bag according to the present invention is composed of a quadrilateral bag body, a deaerating passage provided along a bottom-seal and a snap fastener provided along the opening. The deaerating passage is provided by configurating a deaerating passage opening as a non-adhesive part through one side-seal and along the bottom-seal and by configurating an adhesive part near the bottom of the side-seal to near the other side-seal positioned at a predetermined interval from the bottom-seal in parallel to adhere between the top and bottom films. A paint film coated with a sticky substance having the kinematic-viscosity of 4-5,000.times.10.sup.-6 m.sup.2 /s (100.degree. C.) such as polybutene is applied in the deaerating passage.

Abstract: A method for loading a bulk cargo into a flexible expandable liner. The liner has a body defining an inlet opening and an interior for holding the cargo. An inlet chute is connected to the liner body and extends through the inlet opening. The method includes the step of opening the inlet chute to form a tubular shaped passageway which passageway is in communication with the interior and exterior of the liner. Then conducting bulk cargo through the tubular passageway into the interior. Raising the gas pressure in the interior of the body to force the inlet chute against the liner body and thus close off the chute and inlet opening.

Abstract: A device for giving proper shape to a bag (24) or the like for display purposes comprises an inflatable member (10) which is so designed and arranged to be placed inside the bag or the like to be displayed, and which when inside the bag is capable of then being inflated outwardly to cause the bag to move outwardly to its full and expanded size.

Abstract: There is described an improved inflatable package comprising outer deformable walls defining at least one fluid-tight chamber therebetween, and a one-way valve disposed within the chamber, to be in fluid communication therewith, the valve permitting the ingress of fluid into the chamber, and preventing the egress of fluid therefrom, the valve including a primary duct and at least one flow channel intersecting the primary duct at an angle to place the primary duct in fluid communication with the interior of the chamber.

Abstract: A bag having a filling valve integral with and extending though an end closure section of the bag adapted to be sealed by electromagnetic field induction heating. Valves having a thermoplastic polymeric inner layer are provided with metal foil adjacent to at least a part of the layer as means for inductively heating the polymeric inner layer. Methods and apparatus of sealing a bag having such a filling valve are provided.

Abstract: A bag having a filling valve integral with and extending through an end closure section of the bag adapted to be sealed by electromagnetic field induction heating. Valves having a thermoplastic polymeric inner layer are provided with metal foil adjacent to at least a part of the layer as means for inductively heating the polymeric inner layer. The thermoplastic polymeric inner layer can comprise polyolefins and the metal foil can comprise aluminum. Methods of sealing a bag having such a filling valve are provided.

Abstract: A foldable bag material is formed into a bag having at least one end with a corner and having an end closure formed by the bag material which closes off the one end of the bag. A filter valve tube extends within the end closure at the one corner, the tube having an inner end disposed within the interior of the bag such that the tube is adapted to receive a filler nozzle of a pneumatic filling device for filling the bag with a filling material. The tube has an inner end portion and an outer end portion, the inner end portion having a cross-sectional contraction which is contracted relative to the outer end portion such that the contracted inner end portion forms a seal with the filler nozzle, the tube being made at least partially of a filter material which is gas-permeable but which retains the filling material such that the gas-permeable material provides for venting of the bag during filling.

Abstract: A flexible container for transportation and storage of bulk material includes integral lifting loops having openings for the insertion of lifting devices. In the upper part of the container is placed a separating member, preferably of flexible material, which separates and can close off that part of the container to be filled with bulk material from the lifting area of the container. The separating member is fastened to the container adjacent the openings thereof and possibly also to walls of the container or is pressed thereagainst by a lifting handle sleeve. A filling spout preferably is an integral part of the separating member. Also, the separating member can be Y-shaped or T-shaped including legs or branches that can be equally long or have different lengths. Side legs or branches have openings adjacent edges of which are fastened adjacent the openings in the lifting loops of the container.

Abstract: A down quilt in which a tubular closure section is provided on an opening in the quilt through which a feather feeder nozzle is inserted. A first fastener is provided at the opening and a second fastener is provided on the closure section so that feathers supplied into the interior of the quilt are prevented from escaping through the opening, whereby the quality of the down quilt can be maintained for a long time.

Abstract: A sack is constructed from a thermoplastic film of which the side portions are brought into partial overlapping relationship to define a tube section and top and bottom weld seams are applied transversely. A longitudinal weld seam applied within the confines of the region of overlap terminates at a spacing from the top weld seam to define a filling valve passage. The region of overlap contains a longitudinal inner strip of reduced thickness made in one piece with the walls of the sack.

Abstract: In a bag adapted to contain a flowable product therein, the bag having first and second opposed closed ends, one of said ends having a self-sealing sleeve formed therein through which flowable product may be delivered into the bag, an improved self-sealing sleeve comprising a first generally tubular sleeve extending into said bag at one side of said one end, a second generally tubular sleeve located inside of and being attached to first sleeve and extending beyond the first sleeve into the bag and a third generally tubular sleeve located inside of and being attached to the second sleeve and extending beyond the second sleeve into said bag.