Abstract: A barrier envelope for reusable photo-stimulable phosphor imaging plates, particularly for digital dental imaging comprised of a plastic transparent film and a plastic opaque film sealed to each other about three sides thereof defining a chamber for an imaging plate and wherein a free side of each film is formed with a flap and one flap is coated with an adhesive medium protected by a peel strip and wherein a “Y” shaped notch is provided on a side of the barrier envelope adjacent to the free side of each film the barrier envelope to facilitate tearing open of the barrier envelope in a removal procedure and transport of an exposed imaging plate to an optical scanning assembly.

Abstract: A polyethylene garment protector, extensively used by garment manufacturers to protect garments in transport to and from various facilities such as, factories, distribution centers, and retail establishments. The garment protector is also commonly used by garment pressers or cleaners for the delivery or storage of pressed or cleaned garments mounted on conventional garment hangers. Furthermore, the polyethylene garment protector can also be used to enclose other textiles or goods that may be stored, shipped and/or sold in hanging form. The polyethylene garment protector is provided with at least one zone of weakness on either the front side, back side or both sides of such garment protectors, along which the garment protector may be severed to facilitate its removal so that the enclosed garment is not wrinkled or mussed. Essentially, the zone of weakness provides tear lines upon which the envelope may be opened to facilitate separating the protector and the enclosed garment.

Abstract: A packaging of the Stickpack type and the like with improved opening, comprising a single- or multilayer flexible film that forms a hermetically sealed tubular body provided longitudinally with a first sealing band, of the inside/outside type or of the inside/inside type, of mutually opposite longitudinal flaps of the film and provided transversely with second sealing bands of the inside/inside type; a sealed extension region protrudes from at least one of the second sealing bands on a respective portion of at least one edge of the tubular body, and, in longitudinal alignment with the sealed extension region, transverse preweakening incisions are provided along at least one of the mutually opposite longitudinal flaps.

Abstract: A three-sided pouch formed from a sealable foil comprises two parallel longitudinally extending tubular chambers. A longitudinal bendable sealing seam separates the chambers. Transversely extending sealing seams close the opposite ends of the tubular chambers. In order to enable such pouches to be easily opened, one of the transversely extending seams has a widened portion straddling the longitudinally extending sealing seam and extends to both tubular chambers. A tearing aid for facilitating the tearing open of the two tubular chambers is arranged in the widened portion.

Abstract: A sealable bag for storing merchandise includes a body having a pocket that is adapted to receive the merchandise. The pocket has an opening through which merchandise is placed into the pocket. The body has a pair of flanges disposed along the sides of the body. The body has a neck with the opening of the pocket being disposed at the neck of the body. The neck has a sealing area. The bag includes a pair of stress relief notches disposed in the flanges intermediate the sealing area and the opening of the pocket. Each stress relief notch extends into the neck of the body. The stress relief notches prevent the sealing area from becoming wrinkled while the bag is being sealed with automated equipment thus allowing a clean, unwrinkled seal to be formed in the bag.

Abstract: A packaging bag comprises a bag body, the first heat sealed portion, and the second heat sealed portion and a tear-starting portion. The bag body is made of a plastic laminate film having a pair of opposite side edges. The bag body is formed by bringing the pair of opposite side edges into contact with each other and heat-sealing them over their entirety to form a tubular shaped body having a rear heat sealed portion, and collapsing the tubular shaped body into a flatten shaped body having a front face, a rear face opposing the front face, a pair of opposite side edge portions connecting the front face and the rear face to each other, a first opened portion and a second opened portion opposing the first opened portion. The rear heat sealed portion is placed on the rear face. The first heat sealed portion is formed by heat-sealing the first opened portion. The second heat sealed-portion is formed by heat-sealing the second opened portion.

Abstract: Packaging for receiving liquid, pasty, powdery, granular or solid material having tear-open means and sealed edges and made of a foil-shaped composite material. The foil-shaped composite material has multiple layers. At least one layer of the composite material does not have weakened areas. At least one layer of the composite material has weakened areas located in the packaging at least partly in the area of the filling space. The weakened areas are preferably a series of cuts or a plurality of parallel individual cuts.

Abstract: A plastic film bag assembly includes a bag having front and back walls joined together and defining an opening leading to a cavity. A header portion extends from the back wall for supporting the bag on a structure. A severance line extends across the header and includes tear sections extending inwardly from each of the header side edges. The severance line also includes support sections adjacent and inwardly of the tear sections. The support sections have a strength per unit length of severance line which is greater than the tear sections strength per unit length of severance line whereby, when severing the bag away from the header, a greater force is required for severing along the severance line support sections than the force required for severing along the tear sections. In use, the bag front wall lip is grasped and pulled away from the header for separating complementary profiles and opening the bag. The header tear sections are severed until reaching the support sections.

Abstract: The self funnel drink additive product has two surfaces connected at a perimeter to enclose a volume which contains drink additive, the volume being substantially flat for storage, and has a narrow neck portion of the perimeter, so that the drink additive is funneled through the narrow neck into a vessel opening when the perimeter is opened along an optimal cut line at the narrow neck.

Abstract: A flexible package for dispensing fluid or semi-fluid items. The package includes a top proximal portion and a bottom distal portion. A leash is defined within a side edge panel and extends from the proximal portion to the distal portion. A user tears the top proximal portion at a tear notch adjacent the proximal portion and then tears the top portion down along the leash in order to keep the top portion coupled to the package and allowing for removal of the package's contents.

Abstract: The invention relates to tubular bag-type packings and, in particular, it relates to so-called three-sided pouches formed from a sealable foil and comprising two longitudinally extending tubular chambers. The chambers extend parallel to each other and have opposite ends. A longitudinally sealing seam separats the chambers, and the sealing seam is bendable. Transversely extending sealing seams close the opposite ends of the tubular chambers. In order to enable such packings to be easily opened, one of the transversely extending seams has a widened portion straddling the longitudinally extending sealing seam and extends to both tubular chambers. A device, i.e. a tearing aid for facilitating the tearing open of the two tubular chambers is arranged in the widened portion.

Abstract: A device for manually opening a flexible package, in the form of a bag (1) made from plastics film which is closed by a weld line of closure (4) which is arranged at a filling mouth (2) in such a way as to leave a free skirt. The bag (1) has, at one side end of the filling mouth (2), a weakening line (3) of defined length which is located between the weld line of closure (4) of the filling mouth (2) and a free edge (5) of the filling mouth (2), with the weakening line (3) being directed in such a way as to be located in a contemplated trajectory of manual tearing of the bag (1). The trajectory intersects the weld line of closure (4) and extends across a corner (6) of the bag (1) immediately adjacent the weakening line (3), defining a delivery orifice (10). It is applied preferably to bags of the type for containing a plurality of articles which have to be maintained in a controlled environment and/or must be removed one by one through a small sized delivery orifice (10).

Abstract: A packaging enclosure for containing an article of manufacture, the packaging enclosure includes an enclosed enclosure formed from a sheet material having an internal side forming a boundary for an internal portion of the enclosure which internal side includes a notched portion that is manually removable by an end user.

Abstract: A packaging bag comprises a first ply and a second ply joined along an edge defining the closed end of the bag and along side edges of the bag. A mouth of the bag has a first edge on the first ply and a second edge on the second ply, which projects beyond the first edge and comprises a folded over film portion. The margin of the second edge portion is disposed adjacent the first edge so as to provide a substantially constant thickness of the bag across the mouth and projecting portion.

Abstract: A pouch of the present invention comprises a front and a rear walls and a narrow pouring portion, and at least one wall portion is partially protruded to an outward direction of the pouch to be provided with a bulge portion having a hollow structure at vicinity of the pouring portion. Alternatively, a cut line of the pouring portion is positioned based on a vertex of a vertical angle of an assumed right triangle which is drawn at the pouring portion by the predetermined regulations. A half-cut line as an opening aid may be provided to a position to be opened of the pouch, the half-cut line being formed so as to have a combination of a deep part and a shallow part and/or a combination of a wide part and a narrow part. The bulge portion may be formed by subjecting a preheated resin film to press molding with the use of a die comprising a cavity and a core, and then cooling the thus press-molded resin film while it is held in the die.

Abstract: A flexible paper microwave package in the form of an easily expandable, nontrapping bag (18) is disclosed including a bottom wall (20) and a top wall (22) interconnected together adjacent their circular outer peripheries (20a, 22a) by first and second interconnection portions (26a, 26b). In one preferred form, the top wall (22) is formed from a first portion (22d) having a generally oval shaped access opening closed by a generally oval shaped closure portion (22e) interconnected by a wet adhesive seal (40) to the first portion (22d). In a preferred form, the wet adhesive seal (40) is formed by a plurality of spaced, parallel bands (400, 401, 402) defining a plurality of spaced, parallel spaces therebetween for resisting any leakage from the interior of the bag (18) through the seal (40). The bottom and top walls (20, 22) expand into an opposing double domed shape as the food product is being popped, puffed, or expanded in the microwave oven.

Abstract: A fluid container pouch is provided internally with a flexible straw to allow for the convenient and hygienic consumption of the beverage, or storage and use of other fluid materials. The fluid container pouch comprises at least first and second fluid chambers having at least two flow channels for fluid communication between said first and second fluid chambers. At least one of said flow channels comprises a flexible conduit, such as a flexible drinking straw. The fluid container pouch comprises two opposing pliable sidewalls, and the sidewalls are formed of a composite material, such as a polypropylene ply having a barrier layer of aluminum foil, a metalized coating, or polyethylene vinyl alcohol, on at least one side of said polypropylene ply.

Abstract: A packaging enclosure for containing an article of manufacture, the packaging enclosure includes an enclosed enclosure formed from a sheet material having an internal side forming a boundary for an internal portion of the enclosure which internal side includes a notched portion that is manually removable by an end user.

Abstract: The invention relates to tubular packaging, especially for dry food stuff, which contains the product in a plastic tube that is closed by welding, whereby the packaging comprises a tearing aid which is located in the area of a weld seam. The packaging is also provided with a label whose side facing the weld seam is configured as a curved tearing edge which is suited for intercepting a tear, said tear starting from the tearing aid, and for guiding the same to the edge of the packaging.

Abstract: A new pouch for laundry products and the combination of pouch and laundry product. The pouch includes a tearing notch or a length of weakness, which may comprise a tear tape, permitting manual opening of the pouch prior to tossing the pouch into the washing machine. By tearing open the pouch it is possible to direct liquid or gelled detergent onto clothes for pretreating stains. The remainder of the product, in a second chamber, e.g. liquid, gel or solid, eg, a powder, is retained in the pouch until release during wash. In this respect, it is preferred that at least part of the pouch is a water soluble film to promote release of product during washing in the washing machine and to minimize residue left from the pouch at the conclusion of the wash. The pouch of the invention preferably comprises at least two chambers, one of the chambers being openable by manual tearing along a tearing notch or a line of weakness.

Abstract: A fluid container pouch is provided internally with a flexible straw to allow for the convenient and hygienic consumption of the beverage, or storage and use of other fluid materials. The fluid container pouch comprises at least first and second fluid chambers having at least two flow channels for fluid communication between said first and second fluid chambers. At least one of said flow channels comprises a flexible conduit, such as a flexible drinking straw. The fluid container pouch comprises two opposing pliable sidewalls, and the sidewalls are formed of a composite material, such as a polypropylene ply having a barrier layer of aluminum foil, a metalized coating, or polyethylene vinyl alcohol, on at least one side of said polypropylene ply.

Abstract: The present invention is directed to an easy to handle retort bag. More particularly, the retort bag has a cold corner to provide a point of contact for the consumer, thus preventing scalding of the person handling the bag.

Abstract: A cookie packing container having a hanger to allow a user to eat the contents contained in the packing container, which is provided with an improved structure of a packing container for packing cookies and a hanging tape for allowing a user to hang the packing container in the neck, to thereby allow a user to eat the contents conveniently. The cookie packing container includes a packing container having a longitudinal seaming portion formed by using a planar packing sheet and seaming one end of the packing sheet to thereby contain cookies therein, a low-end seaming portion formed by seaming the lower end of the packing sheet and an upper-end seaming portion formed by seaming the upper-end of the packing sheet and sharpening the upper-end seaming portion to form a peak portion, and a hanger combined in one end of the packing container, for hanging the packing container in the neck.

Abstract: A stand-up bag of heat-sealable plastic film comprising two opposing side walls (1,2) sealed together along side seams (5, 6) and a bottom wall (4) folded inwards into V-shape and sealed to the first and the second side wall along transverse bottom seams (7,8) and along bottom side seams (9, 10). The bag further comprises a top wall (3) folded inwards into V-shape and sealed to the side wall in the same manner as the bottom wall (4). However, the top wall (3) and one of the side walls jointly form a projecting discharge spout (19) having a discharge passage (20), which is closed by a removable end portion (24) and sideways defined by spout side seams (21, 22).

Abstract: An infection preventive cover includes a sheath having at least one opening end, a binding thread to close the opening end of the sheath, and a cutting thread linked to the binding thread, the cutting thread being stronger than the binding thread.

Abstract: A paper bag with a film inner bag in which the inner bag element is constructed so that its closed end portions can be torn in the lateral direction, thus allowing easy opening by hand across the entire width of the bag or across a part of this width. The inner bag element consists of a synthetic resin film and has cut portions formed along the longitudinal direction in the end portions of the bag that are closed by heat-sealing and that are planned to be opened in the future. The end portion constituting the bottom part is closed by heat-sealing, or by being folded together with the outer bag element or stitched with a sewing machine. The outer bag element, which consists of at least one layer, is formed mainly from craft paper. The synthetic resin film that forms the inner bag element is formed from a thermoplastic resin, and has the property of easy tearing in one axial direction.

Abstract: A zippered bag comprises a main bag body having first and second opposing face members, a top, a bottom, and first and second opposing sides; and a zipper disposed on the main bag body. The zipper extends from the top to one of the first and second opposing sides so as to be oblique relative to the top. The zipper may comprise a male track and a female track engageable therewith. The male track and the female track may be formed by an injection molding. Each of the male track and the female track may comprise a main portion and end portions provided on opposite ends of the main portion, each of the end portions having a smaller height than that of the main portion.

Abstract: A beverage container is configured from a front surface portion (5), a rear surface portion (6), a base portion, and a pair of gusset portions (7). The gusset portions (7) configure side portions of the container by heat sealed to mutually confronting edge portions of the front surface portion, the rear surface portion, and the base portion. The upper portions of the front surface portion and the rear surface portion configure a neck portion that has a more slender shape than the remainder of the front surface portion and the rear surface portion and that extends in a single direction. A notch (12) is formed in the edge sealed portion of the neck portion. The front surface portion and the rear surface portion are heat sealed directly together at a predetermined region corresponding to the notch without the gusset portions existing therebetween. A straw extends from the neck portion toward the base portion. The upper portion of the straw is positioned within the neck portion.

Abstract: The present invention is a pouch, which is generally flat in shape having two opposite side walls and reinforcing elements. The reinforcing elements enable the pouch to stand up-right.

Abstract: A pouch made from a heat-shrinkable, gas-barrier, thermoplastic film is suitable for packaging one or a plurality of items. The pouch has a bottom, two closed side edges, and an open mouth for the introduction of the items to be packaged. The pouch has a first seal connecting the two side edges, the seal being between the bottom of the pouch and the mouth of the pouch. The first seal, portions of the side edges, and the bottom together define a first area. The pouch has a second seal which extends toward the first seal, with the second seal and the bottom defining a second area. The second area has a precut which extends from the bottom toward the second seal.

Abstract: A flexible package for dispensing fluid or semi-fluid items. The package includes a top proximal portion and a bottom distal portion. A leash is defined within a side edge panel and extends from the proximal portion to the distal portion. A user tears the top proximal portion at a tear notch adjacent the proximal portion and then tears the top portion down along the leash in order to keep the top portion coupled to the package and allowing for removal of the package's contents.

Abstract: An object of the present invention is to provide a bag which enables refilling of a container from the bag to be carried out smoothly, without the contents coming out of the pouring mouth all at once and without the bag losing its shape, and the pouring mouth to be set to a certain specific size; which eliminates the need of a special sealing device; and which is strong. Further, with the bag according to the invention, the refilling can be carried out easily, without scissors or the like being required for forming the pouring mouth, the overall shape of the bag does not have to be made long in the vertical direction; and without any of the contents remaining in the bag during pouring.

Abstract: This invention relates to a system and method for reclosing a package. A package reclosure is provided with a top layer having a perforation and a carrier substrate. A folded substrate or folded member is provided between the carrier substrate and top layer. The folded member is only secured to the top layer such that, when the perforation is torn, a portion of the folded member may be unfolded to reveal a repositionable adhesive which is used to retain an end of the package in a closed position.

Abstract: An apparatus for carrying and delivering pourable product. The apparatus comprises a bag having a centerline and a pouring region formed on one side of the centerline. A handle is operably connected to the bag and is on an opposite side of the centerline from the pouring region.

Abstract: A single-handed opening mechanism for a container (1) holding a pourable substance comprising an elongate sealing element (2) which is moveable from a first closed position to a second open position. The elongate sealing element (2) is deformable and moves from the first closed position to the second deformed open position by the application of a squeezing force applied by the user's hand substantially along the length of the elongate sealing element (2).

Abstract: The invention is concerned with tubular bag-type packings in the form of so-called stickpacs formed of a sealable foil strip of at least one layer which is molded to form a tube provided with a longitudinal sealing joint extending between the side edges of the packing. The tube is sealed by upper and lower transverse sealing joints. In order to enable such stickpacs to be easily and faultlessly opened, in one instance, also in the area of the longitudinal sealing joint, tearing aids are provided, and in another instance, the tube, via a transverse sealing joint, is provided with an extension, with the transverse sealing joint being arranged to extend at an inclination relative to the longitudinal axis of the packing.

Abstract: An easily openable sealed package bag (P) which hermetically seals a material to be packed (W), such as liquid, powder and viscous material, by longitudinally and laterally sealing three or four sides of a package film (F). A seal opening notch (N) comprising a cut is formed in a sealed portion (S) of the package bag (P) in such a way as to extend in a direction of depth of the sealed portion (S). The sealed portion (S) is also formed with a bent portion (B) adjacent to the seal opening notch (N). The easily openable sealed package bag is capable of enhancing the ease with which the package bag can be opened and the ease with which a seal opening portion can be identified by sight or by touch, without producing cut chips of the package bag. An apparatus for manufacturing such easily openable sealed package bags is also provided.

Abstract: A sealable bag for storing merchandise includes a body having a pocket that is adapted to receive the merchandise. The pocket has an opening through which merchandise is placed into the pocket. The body has a pair of flanges disposed along the sides of the body. The body has a neck with the opening of the pocket being disposed at the neck of the body. The neck has a sealing area. The bag includes a pair of stress relief notches disposed in the flanges intermediate the sealing area and the opening of the pocket. The stress relief notches prevent the sealing area from becoming wrinkled while the bag is being sealed with automated equipment thus allowing a clean, unwrinkled seal to be formed in the bag.

Abstract: A sealable bag for storing merchandise includes a body having a pocket that is adapted to receive the merchandise. The pocket has an opening through which merchandise is placed into the pocket. The body has a pair of flanges disposed along the sides of the body. The body has a neck with the opening of the pocket being disposed at the neck of the body. The neck has a sealing area. The bag includes a pair of stress relief notches disposed in the flanges intermediate the sealing area and the opening of the pocket. Each stress relief notch extends into the neck of the body. The stress relief notches prevent the sealing area from becoming wrinkled while the bag is being sealed with automated equipment thus allowing a clean, unwrinkled seal to be formed in the bag.

Abstract: A sachet-shaped tear-open package for rapid access to a packaged product, having at least one sealed seam with a weakening in the form of a notch or groove as a tearing aid, whereby the weakening has an additional gripping and opening aid in the form of at least one punch-out, aperture, embodied next to the weakening, is characterized in that a rim of the punch-out has an at least partially serrated contour.

Abstract: The invention relates to a pouch or bag (1) of a heat shrinkable gas-barrier, thermoplastic film for packaging one or a plurality of items, said pouch or bag comprising a closed bottom (2), two closed side edges (3) and (4) and an open mouth (5) for the introduction of the items to be packaged, said pouch or bag being characterized in that it comprises a seal (6) along a line, in-between the bottom (2) and the mouth (5), connecting the two side edges (3) and (4), said seal (6) defining with the closed bottom (2) and part of the side edges (3′) and (4′) a closed, airtight area (7) and in that it further comprises another seal (8) extending from the closed bottom (2) toward the closed, airtight area (7) and a precut (9) made in the area delimited by the bottom (2) and the seal (8).

Abstract: The present invention relates to sealed pouches, and apparatus and processes for producing the same. The pouch includes contoured first and second lateral edges, with each lateral edge having concave and convex surfaces. The concave surface of the first lateral edge is substantially opposite the convex surface of the second lateral edge and the convex surface of the first lateral edge is substantially opposite the concave surface of the second lateral edge. Accordingly, a distance between the first and second lateral edges is substantially the same for all elevations of the pouch.

Abstract: An easily openable sealed package bag (P) is disclosed which hermetically seals a material to be packed (W), such as liquid, powder and viscous material, by longitudinally and laterally sealing three or four sides of a package film (F). A seal opening notch (N) comprising a cut is formed in a sealed portion (S) of the package bag (P) in such a way as to extend in a direction of depth of the sealed portion (S). The sealed portion (S) is also formed with a bent portion (B) adjacent to the seal opening notch (N). The easily openable sealed package bag is capable of enhancing the ease with which the package bag can be opened and the ease with which a seal opening portion can be identified by sight or by touch, without producing cut chips of the package bag. An apparatus for manufacturing such easily openable sealed package bags is also provided.

Abstract: A container for containing a product includes a base including three sides and three faces extending from said base. The faces form an apex opposite to said base and each face has three sides. One of the sides of each face is adjacent to a respective one of the sides of the base and the other two sides of each face are adjacent to a respective one of the sides of another face. The container further includes first, second, and third sealed seams. The first sealed seam includes adjacent sides of two of the faces. The second and third sealed seams each include one of the sides of the base and the corresponding adjacent side of one of the faces.

Abstract: A pouch of a heat shrinkable, gas-barrier, thermoplastic film for packaging at least one item, the pouch including a closed bottom; first and second closed side edges; an open mouth; a first seal disposed between the closed bottom and the open mouth, the first seal connecting the first and second closed side edges; a first closed, airtight area defined by the first seal, the dosed bottom, and a portion of the first and second closed side edges; a second seal extending from the closed bottom toward the closed, airtight area; a second area defined by the closed bottom and the second seal; and a precut made in the second area, the precut extending from the closed bottom toward the second seal.

Abstract: A sterilizable flexible pouch package includes a non-woven barrier web, a perforated plastic intermediate web, and an imperforate plastic upper web. Line heat seals bonding the webs from a cavity into which a sterilizing fluid may enter after passing through the barrier and intermediate webs. The line heat seal bonding the upper and intermediate webs is of the delamination failure type. An access opening is provided for insertion of an object to be sterilized into the cavity after which the access opening is sealed, enclosing the object in the cavity. After sterilizing, the package is opened by peeling apart the upper web from the intermediate web which causes a delamination failure of the line heat seal. Preferred materials enable steam sterilization at temperature of 270° F.

Abstract: The present invention relates to sealed pouches, and apparatus and processes for producing the same. The pouch includes contoured first and second lateral edges, with each lateral edge having concave and convex surfaces. The concave surface of the first lateral edge is substantially opposite the convex surface of the second lateral edge and the convex surface of the first lateral edge is substantially opposite the concave surface of the second lateral edge. Accordingly, a distance between the first and second lateral edges is substantially the same for all elevations of the pouch.

Abstract: A high temperature steam-sterilizable flexible pouch package includes a non-woven barrier web, a perforated plastic intermediate web, and an imperforate plastic upper web. Line heat seals bonding the webs form a cavity into which high temperature sterilizing steam may enter after passing through the barrier and intermediate webs. The line heat seal bonding the upper and intermediate webs is of the delamination failure type. An access opening is provided for insertion of an object to be sterilized into the cavity after which the access opening is sealed, enclosing the object in the cavity. After high temperature steam sterilizing, the package is opened by peeling apart the upper web from the intermediate web which causes a delamination failure of the line heat seal. Preferred materials enable vacuum cycle steam sterilization at a temperature of at least 270° F.

Abstract: A flat sealed sachet includes two sheets sealed along their edges to define a cavity therebetween. The cavity encloses one of a liquid, a pasty and a powder product. A sealing strip is defined by the sealed edges of the two sheets. A nose portion extends between the cavity and the sealing strip. A loop-shaped slit is disposed in the sealing strip and extends through the two sheets. The loop-shaped cut surrounds the nose portion and defines a horse hoof-shaped portion. The horse hoof-shaped portion is selectively separable from the sealing strip to define an orifice.

Abstract: A sterilizable flexible pouch package includes a non-woven barrier web, a perforated plastic intermediate web, and an imperforate plastic upper web. Line heat seals bonding the webs from a cavity into which a sterilizing steam may enter after passing through the barrier and intermediate webs. The line heat seal bonding the upper and intermediate webs is of the delamination failure type. An access opening is provided for insertion of an object to be sterilized into the cavity after which the access opening is sealed, enclosing the object in the cavity. After sterilizing, the package is opened by peeling apart the upper web from the intermediate web which causes a delamination failure of the line heat seal. Preferred materials enable steam sterilization at temperature of 270.degree. F.