Abstract: The flexible storage bag includes overlaying first and second sidewalls defining an internal volume that can be accessed from an open top edge. 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 and communicating with the internal volume. To prevent the one-way valve element from becoming clogged by the opposing second sidewall, the bag also includes a textured portion that maintains at least a partial clearance between the first and second sidewalls proximate the valve element. To prevent contamination of the valve element, the textured portion can also be configured to facilitate removal of liquids and juices from air exhausting from the storage bag.

Abstract: A system includes a storage bag having an interior volume for containing food items and a one-way valve element through which air from the interior volume can be evacuated. The system further includes an evacuation device having an inlet opening. To evacuate storage bag, the inlet opening is placed directly adjacent a pliable sidewall of the storage bag about the valve element. The placement of the inlet opening against the flexible sidewall will seal the interface between the valve element and the inlet opening facilitating the evacuation of the interior volume.

Abstract: A closure device includes a spring member to increase the sealing action of the closure device. The closure device is particularly suitable for use with flexible containers. The closure device includes a male and a female closure element that include male and female hook portions, respectively. The male and female hook portions interlockingly engage with one another to provide a leak proof seal for the flexible container. The spring member is attached to one of the closure elements and acts upon the hook portions of the other closure element to increase the sealing action of the closure device.

Abstract: The invention generally relates to interlocking closure devices including two closure elements arranged to be interlocked over a predetermined length. The closure elements permit the venting of fluids when the closure elements are in their occluded vented position. The closure elements have an occluded closed position which creates a seal and prevents fluids from passing between the interlocking closure elements. The closure fastening device may be utilized with a flexible container and is advantageous in permitting a user to vent excess air from the interior of the flexible container prior to sealing the container.

Abstract: The closure device includes interlocking first and second fastening strips. The first fastening strip includes a closure element extruded onto a flange portion. The closure element and the flange portion are composed of materials having different densities to control the shape of the fastening strips. The purpose of changing the densities of the material is to reduce or eliminate the curve in the fastening strips which occurs during the manufacturing process. By providing a lower density material for the closure element, which has a greater volume, and by providing a higher density material for the flange portion, the flange portion will crystallize at the same rate as the closure element. This difference in densities results in a reduction or elimination in the curvature of the fastening strips.

Abstract: A closure device (121) with interlocking fastening strips (130, 131) and a slider (132) that establishes a leak proof plastic bag (120). The ends of the fastening strips are heat sealed, melted or otherwise secured together. The fastening strips (130, 131) include a second seal (129) disposed in close proximity to one of the ends of the fastening strips. The second seal (129) is formed by heat sealing to melt the fastening strips together. The second seal (129) prevents the separator (172) of the slider from deoccluding or forming a gap when the slider (132) is at the occluded end. The second seal (129) extends midway up the fastening strips (130, 131) so that the separator (172) moves over the second seal (129) during movement of the slider towards the end.

Abstract: The closure device includes interlocking fastening strips (130, 131) and a slider (132) slidably disposed on the fastening strips for facilitating the occlusion and deocclusion of the fastening strips (130, 131) when moved towards first and second ends thereof. The slider (132) is provided with a separator (172) for driving fastening strips horizontally outward at different rates. The separator (172) initially drives the fastening strips (130, 131) outward at the same rate and then continues to drive one strip outward while holding the other substantially stationary to facilitate deocclusion of the fastening strips. The fastening strips (130, 131) include guide rails (139, 143). The guide rails (139, 143) are disposed between upper and lower sets of interlocking closure portions. The slider (132) includes guide tracks (221, 222) which engage the guide rails (139, 143) on the fastening strips.

Abstract: A controlled permeability film composition including a film forming polymer; an inert porous filler in an effective amount to reduce the ratio of carbon dioxide permeability to the oxygen permeability of the film; and wherein the filler has a particle size greater than the intrinsic film thickness of the composite film; and a non-porous filler having a particle size larger than that of the inert pour filler and being present in an amount in an effective amount to control excessive variablility of oxygen transmission rate through film upon activation of the film by compression, for example, by roll crushing. Preferably the porous filler is present in an amount sufficient to reduce the ratio of carbon dioxide to oxygen permeability of the controlled permeability film. The addition of the non porous filler provides improved properties, for example, better permeability/temperature behavior, more consistent film properties and better CO.sub.2 /O.sub.2 permeability ratio.

Abstract: A closure device with interlocking fastening strips and a slider which establishes a leak proof seal. The closure device comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length and a slider with a separator finger which slidably engages said first and second fastening strips. The first fastening strip includes a first closure element and the second fastening strip includes a second closure element. The slider facilitates the occlusion of the closure elements when moved towards a first end of the fastening strips. The separator finger extends into the closure elements without extending completely through the closure elements. The portion of the closure elements below the separator finger are occluded when the slider is at the first end of the fastening strips.

Abstract: A closure device providing tactile confirmation of occlusion is disclosed. The closure device comprises first and second interlocking fastening strips arranged to be interlocked over a predetermined length, at least one of the fastening strips having a deformation in the closure device after occlusion of the closure device. This deformation allows a user to tactually confirm that the closure device has been occluded, even after the closure device has been occluded. The deformation may be an inward deformation or an outward deformation on the fastening strip. The deformation may be on one or both of the fastening strips. The fastening strip may include multiple deformations. The deformation may be facilitated by providing a flexure point in the fastening strip, such as, an area of reduced cross-section or a coextruded portion with a different modulus of elasticity. In one embodiment of the invention, the fastening strips include mateable male and female closure elements.

Abstract: The invention relates to a write-on surface derived by surface treatment (corona-discharge or other similar surface treatment) of a novel write-on composition. The write-on composition to be treated is characterized as a physical mixture of two substantially incompatible polymers and, optionally, a particulate material.

Abstract: An interlocking closure fastening device comprising an omega-shaped closure element and a co-acting clamping closure element. The co-acting clamping closure element may have a profile portion comprising two generally parallel arm portions wherein one of the arm portions terminates in an inwardly curved hook portion, and the other arm portion curves slightly inward prior to terminating in an outwardly extending clamp portion; or the profile portion may comprise two outwardly curved arm portions wherein one of the arm portions terminates in an inwardly curved hook portion, and the other arm portion curves inwardly prior to terminating in a slightly outwardly curved hook portion; or the profile portion may comprise one inwardly curved arm portion terminating in an inwardly curved hook portion, and one generally straight arm portion.

Abstract: An interlocking closure fastening device comprising an omega-shaped closure element and a co-acting closure element having a trident profile configuration. The co-acting closure element has a profile portion comprising three generally parallel arm portions. The first arm portion terminates in a hook portion, the second arm portion is a generally straight structure having at least one enlarged portion located anterior to its extremity, and the third arm portion terminates in a funnel portion. The closure device is adapted for use with reclosable plastic freezer storage and cooking bags to provide drip-proof and leak-proof seals.

Abstract: An interlocking closure fastening device comprising an omega-shaped closure element and a co-acting closure element having a trident profile configuration. The co-acting closure element has a profile portion comprising three generally parallel arm portions. The first arm portion terminates in a hook portion, the second arm portion is a generally straight structure having at least one enlarged portion located anterior to its extremity, and the third arm portion terminates in a funnel portion. The closure device is adapted for use with reclosable plastic freezer storage and cooking bags to provide drip-proof and leak-proof seals.