Abstract: In containers having latchable covers for closing the container vessel, the overs are rigidly connected to the vessel opening and this condition can be disadvantageous under various load conditions. To attain a flexible yet secure closure, the cover is provided with an annular groove formed in the peripheral edge thereof. The cover is thereby capable of yielding under stress. For tensioning the cover, a device can be fixed in a recess formed in the inner wall surface of the vessel. Upright supports project out from a plate and are in contact engagement with an end face of the cover remote from a shoulder formed in the inside wall surface of the vessel opening. A tensioning unit is subjected to pressure and then presses the cover together in the region of the annular groove. After the latches are inserted into a recess, the tensioning unit is relieved of stress. The latches are then wedged in by the resilient action of the cover to produce a simple and reliable connection.

Abstract: A portable safety container for the temporary storage, transport, and/or disposal of mixtures comprising waste organic solvents comprises a strong open-topped outer shell, such as part of a metal can, having at least one handle, an inner shell of material resistant to chemical corrosion, for example a glass bottle, fixed within the outer shell and having a protruding neck fitted with a hinged lid which remains open when the container is inverted for emptying but which is normally held closed by gravity when the container is upright.

Abstract: The tamper indicating package comprising a container having a neck, a closure interengaged with the container, and a tamper indicating device comprising a plurality of radially extending legs adapted to extend radially outwardly and axially about the closure. The legs are joined to one another at their inner ends and an integral annular band joins the other ends of the legs. The band extends beneath the flange of the container when the device is applied over the closure on the container, and the legs are made of a material such that the band will snap and/or shrink radially inwardly after application of the device to a position beneath the flange of the container thereby providing a tamper indicating device.

Abstract: A pressure vessel 11 has a hollow member 10, an end closure 19 in telescope relationship with the hollow member, a flexible continuous element 26 extending around the end closure and operatively connecting the closure and the hollow member, a passage 14 for insertion and withdrawal of the continuous element, a removable plug 18 closing said passage for resisting removal of the continuous element, and annular seals 24, 25 between the hollow member and the end closure on both sides of the continuous element. The continuous element may be a length of wire spring.

Abstract: A reuseable plastic cap is disposed over a seal closure on a vial neck to retain the seal closure in place thereon, the cap comprising a body of resilient material having a base overlying the seal closure, opposed jaws on the base for gripping a bead on the vial neck, gripper flanges for manual engagement to spread apart the jaws so as to install or remove the cap on the vial neck, and a releasable locking bar to hold the gripper flanges spread apart and thereby retain the jaws in a locked condition on the vial neck.

Abstract: A sealing element for a snap-on fitment has spaced apart inner and outer skirts engageable with opposite sides of the container neck, an annular wall interconnecting the skirts and an extension from the annular wall forming a fitment engaging portion. An annular snap bead extends from the connecting annular wall to facilitate snap engagement with the fitment, and the engaging portion has an inner sealing surface and a seal bead adjacent its outer end. The connecting wall has an annular relieved section opening into the space between the skirts so that any distortions imposed upon the snap bead and upon the sealing surface as occasioned by any dimensional and/or shape irregularities in the container neck are reduced by the relief provided between inner and outer engagements with the container neck.

Abstract: A security seal is described which can be used to protect the closure device of a container so that a subsequent opening of the container will be evident. The seal comprises a strip of resilient plastic film with patches of a tamper-resistant adhesive at each end, leaving an adhesive-free gap in between. The seal is applied so that the adhesive patches adhere to the container to keep the adhesive-free section flexed closely over and spanning the closure device. Thus, when cut to release the closure part, the strip flexes outward to produce easily noticed loose ends.

Abstract: A lockable cap for a screw top container having an annular element with a plurality of upwardly extending hooks, the element is held in place by a groove beneath the container screw threads. The cap has an annular wall defining an inverted U-shaped hollow into which the hooks project and lock the cap. The hooks can be manually compressed radially-inwardly to unlock them.