Abstract: A container closure which is thermoformed from a sheet of two different materials which are bonded together, the material forming the inside of the closure being relatively soft to serve as a liner.

Abstract: A thermoformed, polymer plastic closure body is disclosed having integrally formed cap, ring and frangible bridge members. Ratchet segments and a collar segment are integrally formed with the ring member and the frangible bridge members extend between the cap member and the collar segment at a location intermediate the ratchet segments for limiting a force applied to the bridge member during mounting rotation of the closure member upon a container. The bridge members are slanted for further reducing the applied force during rotation and the cross sectional area of the bridge member is configured for causing a sheared bridge member to be retained with the ring member. An improved method for fabricating the closure body provides for thermoforming a sheet of polymer plastic to provide a body having integrally formed cap and ring members, and, subsequently mechanically lancing arcuate segments to provide arcuate grooves which are spaced apart by integrally formed bridge members.

Abstract: A tamper-proof closure for a container having a member projecting from its neck, in which the closure is thermoformed with a skirt wall having a tab which engages the projecting member and which breaks off as the closure is unfastened from the container.

Abstract: A one-piece thermoformed tamper-proof closure which provides an indication showing that the closure has been removed from the container on which it was placed. The closure has a child resistant feature in that it is made difficult to open by requiring a squeezing action. In addition, the closure is provided with means for providing a firm locking arrangement after the closure has been opened.

Abstract: A tamper-proof closure for a container having a member projecting from its neck, in which the closure is thermoformed with a skirt wall having a tab which engages the projecting member and which breaks off as the closure is unfastened from the container.