Maxcap Inc.

Bankers Trust Company

Robert L Nolan

Plastic bottle caps of the snap-on type having tamper indicating means such as a tear band. The top wall of the top overhangs its side wall and the overhanging lip is filleted at an angle of about 30.degree. to increase the difficulty of removing the cap by hand without visibly affecting the tamper indicating means. Also, the cap has interior interrupted beads for snapping over the shoulder of the bottle neck and has ribs in the interruptions for adjusting the magnitude of the snap-on and snap-off forces. The cap is molded on a core having grooves for forming the beads and ribs. The cap may have a non-resilient gasket and a dished top so that it can exert pressure on the gasket. A foil seal having adhesive on one surface may underlie the gasket. After the cap has been applied to the bottle neck, the foil seal may be caused to adhere to the bottle neck.

Plastic bottle caps

Plastic bottle caps of the snap-on type having tamper indicating means such as a tear band. The top wall of the tap overhangs its side wall and the overhanging lip is filleted at an angle of about 30.degree. to increase the difficulty of removing the cap by hand without visibly affecting the tamper indicating means. Also, the cap has interior interrupted beads for snapping over a shoulder of the bottle neck and has ribs in the interruptions for adjusting the magnitude of the snap-on and snap-off forces. The cap is molded on a core having grooves for forming the beads and ribs. The cap may have a non-resilient gasket and a dished top so that it can exert pressure on the gasket.

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.

Plastic cap

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.

Bottle caps

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.

Molding

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.

Growing community of inventors

New York, NY, United States of America

Robert L Nolan