An automatic closure for collapsible tubes, squeeze bottles, and the like containers of the type formed from resilient plastic material. The container typically is tubelike, provided with a tapered or frusto-conical neck portion terminating in a flattened mouth defining end lips forming an openable closure. Pressure applied to the body of the container remote from the lips to forms a transverse pinch-off across the end portions wherein the lips are deflected or bent along a line of curvature to one side or the other and at an angle to the axis of the container, and wherein the lips are also bowed, having a curved contour. Such pinch-off forms a closure across the neck portion. The pinch-off opens in response to pressure on the walls of the container proximate thereto in a manner to relive the pinch-off and permit the fluid contents to flow. Specifically, the pinch-off is in the following form: the end lips of the neck have a bowed contour about the lengthwise dimension. The neck is deflected or bent laterally at an angle. The pinch-off is at the line of deflection of the bowed end lips. Along this line (pinch-off) the lips are held together in sealing relationship but they will respond to open and release fluid upon exertion of pressure at a predetermined key area adjacent to the pinch-off line.
This application is a continuation-in-part of Ser. No. 482,337 filed 6/24/74 now abandoned.
This application is also a continuation-in-part of Ser. No. 176,874, filed Sept. 1, 1971, now abandoned entitled "Method of Fabricating Automatic Closure for Containers", which is a continuation-in-part of Ser. No. 842,108, now abandoned filed July 16, 1969, entitled "Automatic Closure for Containers and Methods of Fabricating the Same".
A pair of superimposed panels are heat sealed together to define a reservoir in a dispenser pouch, adapted to contain a liquid therein. A tapered-down neck is defined on a lower end of the pouch and communicates with the reservoir to retain a pre-measured charge of the liquid therein. Narrow overlying and unsealed panel portions at the termination of the neck form a normally closed valve that opens when a predetermined external pressure is applied to the pouch.
A nozzle is attached to a tip of a fluid container which is formed of two flexible sheets overlapped with each other. The sheets have their internal surfaces fitted to each other in a normal state after contents are filled into the container such that even a very small portion of contents remaining in the container can be removed by a required amount without coming into contact with air.
A nozzle is attached to a tip of a fluid container which is formed of two flexible sheets overlapped with each other. The sheets have their internal surfaces fitted to each other in a normal state after contents are filled into the container such that even a very small portion of contents remaining in the container can be removed by a required amount without coming into contact with air.
A self-sealing valve (2) for a liquid dispenser, comprising an envelope (3) of flexible sheet material having opposed inlet and outlet portions and an intermediate portion (6) between the inlet and outlet portions, which intermediate portion (6) comprises a spaced pair of transverse folds (4, 5) in the envelope (3) to restrict or prevent flow of fluent material, e.g., liquid, between the inlet and outlet portions, the arrangement being such that fluent material flow across the intermediate portion (6) can be induced by distortion of the intermediate portion (6), e.g., the application of pressure to the envelope (3) upstream of the intermediate portion, thus causing the seal created by the transverse folds (4, 5) to open to allow the material to pass. A liquids dispensing sachet (1) having a self sealing valve (2) as described above and a wall mounted dispenser (17) for liquids including such a sachet.
The present invention relates to a self-closing liquid dispensing package comprising a liquid container and a self-closing flat channel valve in liquid communication with liquid container, wherein the liquid container comprises a reservoir portion for containing liquid. The reservoir portion is made of a thermoformed thermoplastic material. In one preferred embodiment of the present invention, the self-closing flat channel valve is in liquid communication with the container via a connection portion wherein the connection portion comprises a stiffening crease. The package of the present invention is useful for multiple use of various liquid products having a wide range of viscosity.
