Abstract: Latching device for a drilling device comprising a latching body mountable in an outer tube, an unlatching tube slidably mountable around the latching body, two latches attached to the latching body and pivotable between a deployed position in which the latch cooperates with the outer tube in order to latch the latching body to said outer tube and a retracted position for unlatching the latching body from the outer tube, a piston sliding around the latching body and secured to the unlatching tube, and a compression spring mechanism pressing the piston towards the latches in order to maintain the latches in their deployed position, a pulling force exerted on the unlatching tube compressing the spring mechanism to prevent the piston from pressing against the latches which position themselves in their retracted position.

Abstract: Latching device for a drilling device comprising a latching body mountable in an outer tube, an unlatching tube slidably mountable around the latching body, two latches attached to the latching body and pivotable between a deployed position in which the latch cooperates with the outer tube in order to latch the latching body to said outer tube and a retracted position for unlatching the latching body from the outer tube, a piston sliding around the latching body and secured to the unlatching tube, and a compression spring mechanism pressing the piston towards the latches in order to maintain the latches in their deployed position, a pulling force exerted on the unlatching tube compressing the spring mechanism to prevent the piston from pressing against the latches which position themselves in their retracted position.

Abstract: Herein is disclosed an oxygen barrier composition comprising an oxygen barrier polymer and an oxygen scavenging polymer. The composition can be in the form of a physical blend or a cross-linked blend, and can further comprise a compatibilizer, a transesterification catalyst, or both. Preferably, the oxygen barrier polymer is poly(ethylene/vinyl alcohol) (EVOH), polyethylene terephthalate (PET), or polyamide other than MXD6. Preferably, the oxygen scavenging polymer comprises an ethylenic backbone and a pendant cyclic olefinic group, or the oxygen scavenging polymer is a polyamide derived at least in part from a xylene diamine-based monomer. The oxygen barrier composition can be formed into an oxygen barrier layer of a packaging article. Such layers and articles, and methods for making same, are also disclosed.

Abstract: Herein is disclosed an oxygen barrier composition comprising an oxygen barrier polymer and an oxygen scavenging polymer. The composition can be in the form of a physical blend or a cross-linked blend, and can further comprise a compatibilizer, a transesterification catalyst, or both. Preferably, the oxygen barrier polymer is poly(ethylene/vinyl alcohol) (EVOH), polyethylene terephthalate (PET), or polyamide other than MXD6. Preferably, the oxygen scavenging polymer comprises an ethylenic backbone and a pendant cyclic olefinic group, or the oxygen scavenging polymer is a polyamide derived at least in part from a xylene diamine-based monomer.