Abstract: A plastic bottle cap having a tamper indicating skirt with inwardly extending flaps which move to a position in which they decrease the diameter of the skirt and thus prevent removal of the cap while the skirt is connected to the cap.

Abstract: A plastic screw cap for carbonated beverage bottles having standard necks. Screwing the cap on forces its antitamper skirt over a shoulder of the bottle neck. Unscrewing the cap causes the skirt, or a portion connecting the skirt to the main body of the cap, to break. The skirt has a throat whose I.D. (inside diameter) is smaller than the O.D. (outside diameter) of the bottle threads, but is large enough so that the cap can, under light pressure, wobble or rock down the neck to seat the cap properly for screwing on. The skirt may have a flap which becomes effective to decrease the effective skirt diameter when the cap is being unscrewed.

Abstract: For the molding of bottle caps having irregular lower boundaries, such as caps having depending tabs, the conventional mold has a core and a surrounding sleeve in which the core slides. This is modified by using a split sleeve which is maintained in close contact with the core during molding, but whose elements are freed to move outwardly away from the core when the mold begins to open. This solves the prior art problem of the galling of the contacting surfaces of sleeve and core.

Abstract: A plastic cap for glass or plastic carbonated beverage bottles is shaped so that in use pressure is exerted around the edges of a gasket to give enhanced sealing. A single cap can fit the different necks of standard glass and plastic bottles. Its heat-shrinkable skirt has longer portions between connectors.

Abstract: A milk bottle has an antitamper cap having a plug adapted to fit into the mouth of the bottle. The neck of the bottle is tapered toward the mouth and the cap has means for restraining the top of the neck to keep the mouth in good sealing contact with the plug when the cap is screwed on.

Abstract: A bottle and cap construction for thin-walled plastic milk bottles. It has a double thread and an anti-tamper arrangement. The cap has a plug which engages a lip on the bottle resulting in the upper wall of the cap moving to a substantially symmetrically domed configuration.

Abstract: A bottle and cap construction for thin-walled plastic milk bottles. It has a double thread and an anti-tamper arrangement.

Abstract: A milk bottle has an antitamper cap having a plug adapted to fit into the mouth of the bottle. The neck of the bottle is tapered toward the mouth and the cap has means for restraining the top of the neck to keep the mouth in good sealing contact with the plug when the cap is screwed on.

Abstract: A bottle and cap construction for thin-walled plastic milk bottles. It has a double thread and an anti-tamper arrangement.