Abstract: A method and apparatus for nondestructively testing sealed containers to proof test for seal leaks present in one or more container seals formed between mating parts of a container. The apparatus preferably includes a container rest or support assembly which holds a container being tested. The container support can advantageously include two corresponding testing head members which are movably mounted on a frame to clamp peripheral portions of the container to form a secondary seal outward of the primary seal which is being tested for leakage. The secondary seal creates a test chamber defined within marginal edge portions of the container which is adjacent the primary seal for applying a testing pressure thereto. Some of the preferred embodiments include a passage forming device for forming a testing fluid supply passage into the test chamber. The passage forming device can be an injection probe which forms an opening and injects a pressurized testing fluid into the test chamber.

Abstract: Testing apparatus and processes are described for testing containers or selected portions thereof for leaks. The device includes container receivers for receiving a container. A support engages a surface of the container. The support includes a network of rigid support surfaces, preferably a screen shaped by a rigid base to conform to and engage the container surface. Open fluid passageways are interspersed within the network of rigid support surfaces which hold the container against deformation in response to applied pressure differential. A pressure differential across the surface being tested will result in passage of fluid through a leak in the test area. The fluid passageways facilitate free flow of the fluid from one side to the other. Flow of fluid will produce a detectable pressure differential between the two sides, quickly identifiable as a container leak. The support surfaces expand and contract to facilitate placement and removal of the container.

Abstract: Disclosed are container testing apparatuses and methods for detecting leaks in containers. Such employ first and second annular seals for defining a testing chamber therebetween. An actuating seal is shown which is controllably retracted from engagement with sidewalls of the container. Another embodiment uses two passive seals. A further embodiment uses a pressurized expandable seal. In a preferred apparatus and method, at least one of the first and second seals functions by inwardly pressing against the container surfaces to enhance sealing upon application of differentially pressurized fluid within the testing fluid chamber. A detector can be employed to sense changes in the container associated with the existence of a leak through which the differential pressure of the testing fluid is communicated.