초록 ▼

A closure for a container having generally helical threads on the neck finish is formed from a one-piece cap shell of thermoplastic material including a top wall and a peripheral skirt, the skirt having a plurality of spaced, hard, flexible generally vertical thermoplastic ribs integral with the she

A closure for a container having generally helical threads on the neck finish is formed from a one-piece cap shell of thermoplastic material including a top wall and a peripheral skirt, the skirt having a plurality of spaced, hard, flexible generally vertical thermoplastic ribs integral with the shell for contacting the threads of the container. Each rib is so constructed and arranged that it has sufficient resistance to cold flow that it only slightly flexes and bends around the thread to form a shallow indentation on the rib when the rib is forced into contact with the thread, the indentation being sufficient to provide purchase on the threads for removing the closure.

대표청구항 ▼

A closure for a container having generally helical threads on the neck finish, the closure comprising a one-piece molded cap shell of non-heat shrunk thermoplastic including a top wall and a peripheral skirt, the skirt having means thereon for engaging threads of the neck of a container, the means i

A closure for a container having generally helical threads on the neck finish, the closure comprising a one-piece molded cap shell of non-heat shrunk thermoplastic including a top wall and a peripheral skirt, the skirt having means thereon for engaging threads of the neck of a container, the means including a plurality of spaced, flexible generally vertical non-heat shrunk thermoplastic ribs integral with the skirt, each rib being so constructed and arranged that it has sufficient resistance to coald flow that the rib only slightly bends around the thread to form a slight indentation on the rib when the rib is forced into contact with the thread, the slight indentation being sufficient to provide purchase on the threads for removing the closure, there being a resilient deformable gasket liner inside the cap shell for a top seal, the liner located between the top cap wall and the top of the finish of the container, the cap shell being made of high density polyethylene and the gasket of foamed polyvinyl chloride.