A container has a tube-like or tubular shell, which is sealed against the surrounding atmosphere and has a weld seam at at least one end. For checking the tightness of the container the internal pressure in an interior space of the container is increased by means of external action and the thereby ensuing deformation of the weld seam is detected. Provisions are made in this connection for the weld seam to be clamped between clamping elements before increasing the internal pressure only in a partial area of its surface, which has a distance from the end of the weld seam facing the interior space.

A gas pressure testing device, which is for checking pressure of gas inside the gas compartment portion of a bag, including: a pressing member (31) disposed on one side of the bag, a receiving member (38) positioned on another side of the bag, and a movable support member (39) having thereon the pressing member and a distance sensor (32). The pressing member being kept urged toward the gas compartment portion by air cylinder (44) is moved toward the bag so that the gas compartment portion is sandwiched by the pressing member and the receiving member. The distance sensor measures the distance (D) at such time to the pressing member and sends a distance signal to a control unit (37). Based on the distance signal, the control unit determines whether or not the gas pressure in the gas compartment portion is within a preset range.

The present invention relates to a seal inspection device for inspecting seals of a container. Specifically, according to an embodiment of the present invention, provided is the seal inspection device for inspecting the sealing of a container, comprising: an irradiation unit for irradiating light along an optical path extending in a first direction; a sensor unit for detecting the light traveling along the optical path; and a pressing module for pressing the sealing of the container, wherein the pressing module includes a plurality of pressing units arranged on the optical path, and the pressing unit can be selectively located at a first position for blocking the light from reaching the sensor unit and a second position for allowing the light to reach the sensor unit.

A medical device having at least one invasive portion is disclosed. The medical device has a housing at least partially surrounding a tight chamber. The tight chamber sustains a pressure difference between an interior lumen of the tight chamber and the surrounding environment. The housing also has at least one deformable component. The housing is configured such that a state of deformation of the deformable component provides for a measurable indication of the pressure difference between the interior lumen of the tight chamber and the surrounding environment.