Abstract: A container assembly comprising a container for containing a fluid and a container closure. The container includes a neck having a mouth therein for passage therethrough of liquid in the container. The container closure comprises a closure cap portion adapted for releasable connection to the neck of the container. The closure cap portion comprises a generally annular-shaped skirt and at least three lugs extending generally radially inwardly from an inside surface of the skirt. The container further includes at least three bayonet provisions on an outer surface of the neck for matably receiving the at least three lugs of the closure cap portion, the bayonet provisions and the lugs being shaped and configured to releasably lock the skirt of the closure cap portion to the neck of the container.

Abstract: A closure for a bottle, comprising a cap-shaped closure component; a projection directed inwardly from an edge of the cap-shaped closure component to grip behind an outwardly directed projection at a neck of a bottle; a substantially cylindrical sealing element extending axially from a bottom of the closure component, the sealing element being disposed within the closure component; and a radial projection formed outside of the sealing element and disposed away from the bottom and having a diameter larger than the inside diameter of the neck of the bottle to be sealed by the closure means in such a way that a sealing surface formed by the radial projection tightly rests against an inside surface of the neck in a closed mode. The bottom comprises a cross-sectional slimming disposed radially beyond the cylindrical sealing element, the slimming having a thickness less than the thickness of an adjacent portion of the bottom such that the slimming functions as a hinge.

Abstract: The neck of a container has a smooth seal surface engaged by the inner skirt or plug of a cap. Such surface is free of trim and parting line flaws which are characteristic of blow-molded jars because the surface is formed in such a way that the seal surface is not in contact with mold parting lines and further the trim (excess plastic) of the neck is located away from the sealing surface. In one form of the disclosure, above the sealing surface the neck wall slants outward and then bends upward-inward in a short, tapered stretch about 18.degree. to the horizontal which engages the underside of the cap disk to compress against the disk or a liner or foil. Other forms of seal surfaces are disclosed. The exterior of the neck is formed with shoulders which engage over locking beads on the interior of the outer skirt of the cap. Caps suitable for combination with the neck, methods of forming the neck and mold apparatus for forming the neck are also disclosed.

Abstract: Disclosed is a closure for a container, such as a blow molded jug having a neck surrounding an opening therein, the closure having a first annular portion and a second annular portion. The first annular portion in the closure has a wiper seal and a lip seal. The second annular portion exerts an upward pressure on the lip seal which causes improved sealing and leak-tight properties during shipping, handling, etc. The upward pressure also enhances the effectiveness of the wiper seal. The second annular portion may include an annular tear skirt having a pull tab for the removal thereof to facilitate removal of the closure from the container. The closure may also include a plug seal, and a lower annular portion extending from the second annular portion.

Abstract: The neck of a container has a smooth seal surface engaged by the inner skirt or plug of a cap. Such surface is free of trim and parting line flaws which are characteristic of blow-molded jars because the surface is formed in such a way that the seal surface is not in contact with mold parting lines and further the trim of the neck (excess plastic) is located away from the sealing surface. In one form of the disclosure, above the sealing surface the neck wall slants outward and then bends upward-inward in a short, tapered stretch about 18.degree. to the horizontal which engages the underside of the cap disk to compress against the disk or a liner or foil. In another form of the invention, above the seal surface the neck extends outward and the upward and then inward in a flange which is trimmed along a line which has a circumference no less than the circumference of the seal surface. The exterior of the neck is formed with shoulders which engage over locking beads on the interior of the outer skirt of the cap.

Abstract: A tamper-indicating closure is used with an associated container having a finish having an external thread formation thereon, and an annular locking ring located axially under the thread formation. The closure includes a closure cap having a circular top wall portion defining an outermost edge and a top wall extension region. The closure cap includes an annular skirt portion depending from the top wall portion inwardly of the outermost edge. An internal thread is formed in the skirt and defines a skirt wall plane. The closure includes a plurality of ribs extending from the top wall extension region to define an enlarged grasping region to comfortably fit a user's hand. An annular tamper-indicating band depends from the cap and is detachably connected to the cap by a plurality of circumferentially spaced, frangible connectors extending between the band and at least some of the ribs. The band includes an internal surface configured for engaging the locking ring and separates the band from the skirt portion.

Abstract: A sealed container includes a base jar for containing a substance and a removable lid for closing and sealing the base jar. The base jar includes a bottom wall, a side enclosure extending upwardly from the bottom wall having an upper portion with a screw thread, and an upper wall extending inwardly and upwardly from the upper portion of the side enclosure having a circular brim which defines a wide mouth opening for the base jar. The removable lid includes a top wall and an encircling member extending downwardly therefrom with a screw thread which matingly engages with the screw thread of the upper wall of the base jar. For sealing with the base jar, the removable lid also includes a circular projection extending downwardly from the lid which engages and seals with the circular brim.

Abstract: A fitment for use as a pour spout for a paper carton or flexible bag for liquids and powders has a flange which may be welded around a hole in the carton. A spout projecting outward from the flange is provided with a removable membrane integral with an inward projection positioned on the interior of the spout approximately midway of its height. Preferably the membrane is concave. A horizontally disposed pull ring is attached to the membrane by a connector so that pulling the ring removes the membrane by fracturing the tear line at the juncture of the outer edge of the membrane and the projection. A cap snaps over the spout and may be removed by unscrewing the complementary threads on cap and spout. A tamper-evidencing band frangibly connected to the lower edge of the cap skirt engages the exterior of the spout so that the cap cannot be removed without breaking the fragible connection.

Abstract: The present invention provides a retortable container which has an engagement ridge (19), of an outer diameter D.sub.1 smaller than an inner diameter D.sub.2 of a thread of a cap (20), formed on the outer circumference of the neck (13) near the top face thereof and an engagement portion (26) having an engaging hook (26a), capable of engaging with the engagement ridge (19) of the neck (13) under the condition that engagement of the neck (13) and the cap (20) is completed, being formed integrally therewith on the bottom surface of the top wall (21) of the cap (20), whereas the engagement portion (26) is formed in a shape of cylinder having a wall thickness smaller than the wall thickness of the circumferential wall (28) of the cap (20), and the engaging hook (26a) protrudes in an annular shape inwardly from the open bottom end of the engagement portion (26).

Abstract: In the case of over-tightening of the closure-cap on a beverage bottle (through turning in the wrong direction) there is the risk that, due to the high internal pressure, not only will the thread jump, but also that the cap will be ejected directly from the container. In order to avoid this risk, the invention proposes a screwable closure-cap with security against over-tightening. This cap possesses a ramp element (3) on the end of the thread oriented towards the cap-base, said ramp element being able to engage with the thread-start of the container mouth in the case of over-tightening of the closure-cap. As a result, the cap-wall in the area of the ramp element will be forced outwards in the case of over-tightening so that jumping of the thread in this region will be facilitated. In this way, jumping of the thread on one side only--on the ramp element side--will be achieved when over-tightening is continued, so that ejection of the closure-cap will not be possible.

Abstract: A squeeze contour seal assembly includes a container and a cap. The container has a neck portion which forms an opening. The neck portion has first and second wall thicknesses and screw threads for engaging the cap. The first wall thickness is greater than said second wall thickness. The cap has grooves for engaging the screw threads and a plug seal for releaseably engaging the opening when the screw threads and the grooves are threadably engaged. The second wall thickness engages a slot formed between the plug seal and the cap, thereby creating an interference fit between the neck portion and the plug seal and providing a leak free seal.

Abstract: The present invention is a pressure equalizing and foam eliminating cap for a container. Pressure equalization and foam elimination is accomplished by designing the cap so that it can be rotated between a fully closed position, a gas venting position and a fully open position. This is accomplished in several ways. A first embodiment includes a spring biased, gas separation membrane between the cap and the mouth of the container. A second embodiment includes a finely, transversely perforated, annular plug on the underside of the cap and a seal between the plug and the interior of the neck. Alternatively, in this embodiment, the perforations may be larger and protected by a gas separation membrane. A third embodiment is similar to the second but incorporates two seals, one above and one below the perforations. In this embodiment also, the perforations may be larger and protected by a gas separation membrane.

Abstract: A child-resistant container and closure assembly having a container neck with a first screw thread and two first locking elements located below the first screw thread on opposite sides of the container neck. A closure for the container neck has a second screw thread complementary to the first screw thread, a resiliently deformable skirt, and two second locking elements on opposite sides of the resiliently deformable skirt. The first and second locking elements mutually engage in ratchet fashion when the closure is screwed onto a fully engaged position on the container neck and subsequently block unscrewing of the closure unless a radial pressure is applied to the skirt at positions spaced from the locking elements to deform the skirt to release the locking elements. The first and second threads are two-start, fast-turn threads so that the closure can be moved from a substantially fully disengaged position to a substantially fully engaged position on the neck by rotation through about 180.degree. or less.

Abstract: A fitment for use as a pour spout for a paper carton or flexible bag for liquids and powders has a flange which may be welded around a hole in the carton. A spout projecting outward from the flange is provided with a removable membrane integral with an inward projection positioned on the interior of the spout approximately midway of its height. Preferably the membrane is concave. A horizontally disposed pull ring is attached to the membrane by a connector so that pulling the ring removes the membrane by fracturing the tear line at the juncture of the outer edge of the membrane and the projection. A cap snaps over the spout and may be removed by unscrewing the complementary threads on cap and spout. A tamper-evidencing band frangibly connected to the lower edge of the cap skirt engages the exterior of the spout so that the cap cannot be removed without breaking the fragible connection.

Abstract: The invention concerns a plastic screwable closure cap which possesses a bung type internal seal (4) for sealing a closeable container. The internal seal comprises a narrow sealing portion with an insert portion (6) immediately beneath, said insert portion serving to centre and gently introduce the internal seal. In order to attain the earliest possible venting of the closure cap when screwing off, venting recesses are provided on the insert zone (6). These prevent the insert portion from sealing the container, and enable the release of gas from the container as soon as the sealing portion comes out of engagement with the container mouth. The side surfaces of the vent recesses also serves as friction surfaces, in order to generally flatten irregularities on the container mouth before the actual sealing portion is engaged.

Abstract: The closure cap of a closure and container package for a pressurized liquid is designed with a sealing flange which depends from the cap top at an angle to a sealing location on the container wall so that an increase in container pressure will increase the sealing force of the flange against the container wall. A pressure relief passage is provided downstream of the sealing location.

Abstract: A closure for a container having a two portion sealing rib projecting downwardly form the underside of the top. The first portion of the rib being contiguous with the top and the second portion being frusto-conical and contiguous with the end of the first portion and extending radially inwardly to terminate in a circular free edge. The upper surface of the second portion has an engagement means comprising a continuous annular ridge which engages with the underside of the top of the closure which in turn has a continuous annular ridge positioned inwardly and adjacent the first portion of the sealing rib. A closure for a carbonated liquid container having a sealing means which has attached thereto an abutment which will firmly engage with the thread on a neck of container if the closure is over-torqued thereby preventing missiling of the closure off the container.

Abstract: A plastic container closure comprising a top panel, a skirt portion, an annular protruded portion that is formed inwardly from the inner surface of the top panel and on the inside of a portion near the root of the skirt maintaining a small gap therebetween, and a sealing liner that is fitted by press-molding on the inside of the top panel, wherein a substantially vertical portion is formed on said liner along the inner surface of the annular protruded portion, and sealing performance is maintained by the engagement between the outer edge of the mouth of the container and the substantially vertical portion. Since the sealing is accomplished over a surface having a predetermined width in the up-and-down direction, the sealing performance is not impaired even when the top panel is deformed by the pressure. Moreover, favorable sealing performance is maintained even against shock that is given to the container at the time of fitting the closure.

Abstract: There is proposed a plastic closure which serves to close a container (3) with a mouth region (5). The closure (1) has a lid (7) allocated to the container mouth (5) and an annular side wall (9) connected with this. On the inner surface (15) of the side wall (9) there are provided fastening means (16) which coact with corresponding fastening means (14) on the outer surface (11) of the container (3) and are constructed, for example, as screw threads. The closure has, finally, also a sealing means. It is distinguished in that the sealing means (11) has a circumferential pivotable sealing lip (9) projecting from a support (15), which lip coacts with a side wall (25) surrounding the container mouth (21) of the container (19), which in the closing of the container is swung out of a rest position into a sealing position and which in its sealing position is clamped between support and side wall of the container so that it is subjected to a compression.

Abstract: A threaded tamper indicating closure-container package provides an indication of initial opening by how far the closure threads onto the container neck. In the original package condition the bottom of the closure skirt is adjacent a shoulder on the container. After the package has been initially opened and the closure reapplied, the bottom of the closure skirt is noticeably above the container shoulder. A word message such as "opened" can also be exposed on the container neck between the shoulder and the bottom of the closure skirt when the closure is reapplied.

Abstract: A twist-off closure is disclosed for all kinds of containers having a head and a closure cap. The container head has at its top end a sealing lip shaped as a circumferential bead. A steep, multiple-start thread is located below the sealing lip. A fin is arranged between each winding of the steep thread and the container shoulder. The closure cap has a corresponding inner thread that co-operates in the closed state with the fins of the container head causing the closure cap to be clamped, so as to prevent the container from being unintentionally opened by itself. In the closed state, the first part of the windings of the thread of the closure cap engage the fins of the container head, and this is clearly perceived as a pressure point when twisting the cap by hand. All that is required to open and close the closure cap is to twist it through a half turn.

Abstract: Container closure apparatus includes a rigid container having an open end with a top edge along with a a collapsible container disposed within the rigid container and having an open end. A cap is provided for covering the rigid and flexible container open ends and a plug seal provides a primary seal between the rigid container and the flexible container. The plug seal includes, in combination, a peripheral outwardly extending wall portion on the flexible container and a depending portion, extending from the cap, for pressing the wall portion against an inside wall of the rigid container. A gasket seal provides a secondary seal between the rigid container and the flexible container. The gasket seal includes, in combination, a lip outwardly extending from the flexible container open end and a groove, disposed in the cap, for pressing the lip against the rigid container top edge.

Abstract: A one piece plastic closure for sealing a container, the closure having a top portion and a skirt portion depending from the top portion. The closure has an annular sealing rib which projects downwardly from the underside of the top portion. The rib includes a first portion having a substantially cylindrical inner surface contiguous with the underside of the top portion and disposed radially inward of the skirt and a second, frusto-conical, portion contiguous with the end of the first portion distal to the underside of the top portion and extending radially inwardly and terminating in a circular free edge, such that during engagement of the cap with the neck of the container, the second, frusto-conical, portion will be engaged by the free end of the neck and folded back against the first portion of the rib to form a gas-tight seal between the neck of the container and the closure.

Abstract: A child-resistant container and closure assembly having a container neck with a first screw thread and two first locking elements located below the first screw thread on opposite sides of the container neck. A closure for the container neck has a second screw thread complementary to the first screw thread, a resiliently deformable skirt, and two second locking elements on opposite sides of the resiliently deformable skirt. The first and second locking elements mutually engage in ratchet fashion when the closure is screwed onto a fully engaged position on the container neck and subsequently block unscrewing of the closure unless a radial pressure is applied to the skirt at positions spaced from the locking elements to deform the skirt to release the locking elements. The first and second threads are two-start, fast-turn threads so that the closure can be moved from a substantially fully disengaged position to a substantially fully engaged position on the neck by rotation through about 180.degree. or less.

Abstract: A threaded closure is provided for engaging a threaded container neck. The closure has a dual sealing plug which provides a primary continuous rotary seal and a secondary self centering seal with the inside surface of the container neck.

Abstract: A vessel and closure assembly for culturing cells wherein a gas permeable membrane is provided in the closure to allow rapid and uniform equilibration of gases between the atmosphere of the vessel and the atmosphere of the incubator. A plug is provided for occluding passage of gases through the gas permeable membrane when the vessel is removed from the controlled atmosphere of the incubator.

Abstract: A cap for a bottle having a tubular neck formed with an external screwthread and terminating at an annular rim surface has a cup-shaped body generally centered on an axis and formed unitarily with an end wall generally perpendicular to the axis. An annular skirt projects axially downward from the end wall and an internal screwthread in the skirt can mate with the screwthread of the bottle neck. A flexible annular web has an outer periphery joined to the skirt adjacent the end wall and an inner periphery secured to a seal ring. The web and seal ring are dimensioned to engage the rim surface when the cap is threaded onto the neck, and an antitamper ring is secured to a lower end of the skirt.

Abstract: A package suitable for storing and dispensing potentially dangerous materials. The package is resistant to opening by children but readily openable by adults, particularly adults having impaired manual dexterity of their hands and/or fingers. The package includes a bottle having a finish portion. The finish portion has a platform with at least one resiliently deformable pushtab secured to the platform. The resiliently deformable pushtabs contain a vertical extensions which engage the interlocking pawls on the innermost surface of the closure skirt when the closure is fully assembled onto the finish portion. To remove the closure, the opposed pushtabs must be depressed prior to unscrewing to the closure to disengage the pushtab extensions from the interlocking pawls on the closure.

Abstract: A tamper evident plastic closure for containers and the like. The closure has a top portion and a depending annular skirt portion with a annular ring attached to the closure by a plurality of frangible elements. The annular ring includes a plurality of circumferentially spaced radially inwardly extending projections arranged for registration with a locking flange on the associated container for separation of the annular ring from the closure skirt upon removal of the closure indicating tampering thereto.

Abstract: A tamper indicating closure comprising a one-piece molded plastic closure which threads onto the finish of a container such that when the closure is removed from the container, a tamper indicating band becomes separated from a lower end of a cap member of the closure. The tamper indicating band is joined to the closure along a weakened frangible line. The band includes a flexible Y-shaped annular flap segmented into tabs and attached to the lower end of the annular tamper band. When the closure is applied to the container, the annular band folds radially inward and up toward the cap member. The interior surface of the band and the first leg of the annular band include corresponding ratchet teeth which are designed to accommodate a varying degree of finish tolerances and which engage upon removal of the cap from the container. A second leg of the annular flap extends outwardly beneath a peripheral bead on the finish of the container when the closure is fully attached.

Abstract: A one-piece plastics closure for a carbonated beverage bottle has a sealing ring which extends inwardly and downardly towards the closure mouth from its attachment to the closure body. When the closure is fitted the ring extends around the outer radius and over the annular top face of the bottle neck, backed by a stepless abutment and reaction surface of the closure body. The latter surface engages the sealing ring mechanically above the container top face to determine the fitted position of the closure and create a seal when the pressure in the bottle is low. When the product pressure is high, however, the effective seal is made between the sealing ring and the outer radius of the bottle neck. For that purpose the abutment and reaction surface is roughened, so allowing access for the product pressure to the back of the sealing ring.

Abstract: A one piece plastic closure for a container having an externally screw threaded neck, the closure comprising a top portion and an internally threaded skirt. The closure has an annular sealing rib which projects downwardly from the underside of the top portion. The rib includes a first, substantially cylindrical, portion contiguous with the underside of the top portion and lying adjacent or abutting to the skirt and a second, frusto-conical, portion contiguous with the end of the first portion distal to the underside of the top portion and extending radially inwardly to terminate in a circular free edge, such that during threaded engagement of the cap with the neck, the second, frusto-conical, portion will be engaged by a free end of the neck and folded back against the first, substantially cylindrical portion of the rib to form a gas-tight seal between the neck of the container and the closure.

Abstract: A covered airtight container capable of preventing a soup from leaking therefrom. The covered airtight container comprises a body made of hard plastics and a cover made of soft plastics wherein the cover has a reverse channel-shaped edge portion piece formed by bending the upper end edge thereof upward and reversing it downward so as to cover the upper end portion of the body. The body has an annular stepped portion to which the cover is retained at the inner peripheral surface of the upper end portion of the peripheral wall. The cover has an annularly projected fin for elastically contacting the edge of said annular stepped portion. The covered airtight container may be formed square shaped with circumferential surfaces of the body and cover being slightly curved shape close to a circle. Particularly, the leaking prevention effect can be conspicuous since the sealing effect or state is assured at the inner and outer surfaces of the peripheral wall of the body.

Abstract: An injection molded threaded cap for use with containers of varying dimensions. The cap of the present invention includes a cover from which depends an integral plug. An auxiliary sealing ring is disposed at the outside base of the plug to compensate for differences between the diameter of the plug and the diameter of the opening to be sealed by the cap. To prevent doming of the cover of the cap, the underside of the cover has shrinkage resistance formations which provide the cap with structural resistance to the effects of shrinkage. The cap of the present invention further includes a ratchet ring having ratchet teeth designed to enhance the tamper-evidency of the frangible ratchet ring.

Abstract: A sealed container includes a base jar for containing a substance and a removable lid for closing and sealing the base jar. The base jar includes a bottom wall, a side enclosure extending upwardly from the bottom wall having an upper portion with a screw thread, and an upper wall extending inwardly and upwardly from the upper portion of the side enclosure having a circular brim which defines a wide mouth opening for the base jar. The removable lid includes a top wall and an encircling member extending downwardly therefrom with a screw thread which matingly engages with the screw thread of the upper wall of the base jar. For sealing with the base jar, the removable lid also includes a circular projection extending downwardly from the lid which engages and seals with the circular brim.

Abstract: A threaded closure and container arrangement having complementary annular surfaces on the closure and container which engage each other during threading and unthreading to guide the closure and container into axial alignment and to shape the relatively flexible neck opening of the container into an accurate circular shape so that complementary sealing surfaces are brought into accurate engagement with each other and so that the complementary surfaces maintain an axial force tending to maintain the closure and container in sealing relationship during at least initial unthreading movement of the closure from a fully closed position on the container

Abstract: A tamper indicating closure has a tamper indicating band which is retained on a container by a container neck flange without the use of a cooperating bead or flange on the tamper indicating band. The retention is accomplished by providing a flexure at the bottom of the cap skirt which permits the band to move outwardly over and under the container flange. The closure can have a tear strip which provides the flexure on the closure.

Abstract: A closure device for fermentation test tubes or flasks (vessels) comprises a cylindrical cap which is either molded integrally with the vessel as one piece or is molded separately and is snugly fitted over the neck of the vessel, in a fashion which not only allows for free gaseous flow between the contents of the vessel and the ambient atmosphere but also facilitates easy access to the contents of the vessel without having to detach the closure from the vessel. Particular features of the cover permit manipulation with the fingers of the hand holding the vessel.

Abstract: To permit a container and a cap to remate with each other during resealing without fouling by solid debris such as small particles without exceptional preparations to withstand the deteriorating effects of corrosive materials and solvents and to consistently and quickly form a gas-tight seal, the container has a flat angled surface and the cap has cooperating edge that engages the flat surface in a closed line when the cap is fully inserted with a solid closed surface within the line, the closed line having a width perpendicular to its length within a range of 0.5 millimeters to 1.5 millimeters. The cap is closed by screw threads or the like that force the cooperating surfaces together with a pressure of at least 100 psi at an angle of between 75 degrees and 105 degrees.

Abstract: A plastic container closure package with a linerless sealing closure system comprising a plastic container having a threaded finish for receiving a closure having a base wall and an internal skirt with complementary threads on the skirt. The plastic container is made by a process wherein a tube of molten plastic is inflated and blown to form the container and thereafter the tube is trimmed to form the sealing surface of the finish of the container. The closure includes an annular flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure for engagement with the container. The annular flange includes a smooth continuous frustoconical surface that faces the finish of the container and engages the inner edge at the juncture of the top surface and inside surface of the finish of the container. An annular stop extends axially from the underside of the base wall of the closure to limit the flexing of the annular flange.

Abstract: An injection molded threaded cap for use with containers of varying dimensions. The cap of the present invention includes a cover from which depends an integral plug. An auxiliary sealing ring is disposed at the outside base of the plug to compensate for differences between the diameter of the plug and the diameter of the opening to be sealed by the cap. To prevent doming of the cover of the cap, the underside of the cover has shrinkage resistance formations which provide the cap with structural resistance to the effects of shrinkage. The cap of the present invention further includes a ratchet ring having ratchet teeth designed to enhance the tamper-evidency of the frangible ratchet ring. In an alternative embodiment, the cap includes a thread form which reduces the amount of rotation required to install the cap onto a bottle neck.

Abstract: A closure for sealing a rim of an open mouth of a container including a substantially cylindrical end cap closed at a first end thereof by a top surface, open at a second opposite end thereof and including an annular side wall having a predetermined width extending between the first and second ends, the top surface including a first inside surface facing the interior of the end cap and a second exterior surface facing the exterior of the end cap, a first flexible seal member connected to and depending a predetermined distance from the first inside surface of the top surface proximate the annular side wall for cooperative sealing engagement with an outer edge of the container rim and for inhibiting outward distortion of the container rim, and a second flexible seal member connected to and depending a predetermined distance from the first inside surface of the top surface and within the confines of the first seal member for sealing engagement with an inner edge of the container rim and for inhibiting inward dis

Abstract: A molded screw-threaded plastics closure has depending from the underside of the top an annular sealing portion spaced inward of the skirt. The sealing portion includes a plug part with a sealing rib for engaging the internal surface of the neck of a container, a radially outwardly projecting flange above the plug part, and a waisted pivot part disposed between the flange and the top. As the closure is applied, the sealing rib first moves into sealing engagement with the bore of the neck of the container, and then the flange comes into engagement with the top of the neck of the container and causes the sealing portion to pivot outwards about the part to tighten the seal. An internal rib on the skirt engages the outer surface of the neck of the container to form a secondary seal. Forms of stop may be provided for limiting the movement of the closure and/or the pivotal deflection of the sealing portion to prevent over-tightening during application of the closure.

Abstract: A linerless plastic closure is configured for side-sealing engagement with an associated container. The closure includes a circular top wall portion, and an annular skirt portion depending from the top wall portion, and including an internal thread formation. A two-component side-seal arrangement is provided which includes a relatively rigid support annulus, and a relatively flexible sealing lip. The sealing lip is movable into a position for sealingly engaging a generally outwardly facing surface of an associated container, with the relatively rigid support annulus desirably acting to enhance the sealing effect of the sealing lip. Notably, the relatively rigid sealing annulus further desirably acts to provide a self-centering action for the closure during application to a container.

Abstract: A unitary closure assembly having a cap body that has an upper portion with a substantially conical drop dispensing tip including a ringed protrusion disposed around the base of said tip, and a lower portion that can be secured to an opening in a container. The cap body has a lid secured to it by a hinge. The lid comprises a substantially conical raised portion that is adapted to enclose and cover the drop dispensing tip on the cap body. The lid has a raised ring disposed on its inner side which seals the opening in the drop dispensing tip, and a ringed depression in the inner side which mates with the ringed protrusion on the drop dispensing tip.

Abstract: A linerless closure which provides an effective seal against oxygen penetration and moisture evaporation includes a cap with an inner annular member defining an annular outwardly directed sealing edge which forms a line seal with the inner cylindrical surface of a container wall and an outer annular member defining an annular inwardly directed sealing edge which seals against the outer cylindrical surface of a container wall.

Abstract: In combination, a container and a linerless cap and a method of forming the cap. In the method the cap is molded from plastic and includes a top wall, an outer depending skirt and an internal depending substantially annular wall having an upper end integral with and depending from the top wall and a lower free end. Thereafter the free end is engaged by a curling tool to progressively turn the free end away from the internal wall to curve the free end into a curvilinear compressible and resilient free end adapted to be engaged for sealing. The engageable free end of the seal can have a coil, O, U, J or quarter round cross sectional shape and can be a rim, plug or corner seal.

Abstract: The present invention is a seal for a container closure which is characterized by the fact that associated with the sealing lip (3) is an actuating arm (5) by which the sealing lip can be swiveled. The seal is part of a container closure (1) with a side wall (11) and a bottom (15). When the closure is screwed onto a container, the actuating arm is swiveled counterclockwise, this swivelling movement being facilitated by a deliberate attenuation (17) in the region of the bottom (15) of the closure (1). A counterclockwise swiveling movement of the actuating arm (5) also causes the sealing lip (3) to swivel counterclockwise and thus to lie against the outer wall of the container. A sealing surface is created not only between the container and the actuating arm (5), but also between the outside of the container and the sealing lip (3).

Abstract: A closure seal for sealing a closure to a container land surface includes the application of a sealing material to the land surface just prior to the engagement of the closure and the land surface so that the sealing material may fill in any gaps, imperfections, or misalignments between the land surface and the opposing surface of the closure. In addition, the underside of the annular portion may be provided with a plurality of depending, variable length annular sealing beads which engage the land surface to effect a leak-proof seal.

Abstract: A container assembly has a container with a body and an elongated neck of generally circular cross section and having threads adjacent its upper end. The neck also has a ring adjacent its lower end with a downwardly and outwardly flaring surface. Engaged on the neck is a cap with an elongated tubular body portion extending downwardly about the neck. The inner wall of the body portion adjacent its upper end has threads which are engaged with the threads of the neck, and the inner wall of the lower end of the body portion tapers downwardly to a greater diameter and resiliently bears against the outer edge of the ring.