초록 ▼

An all-plastic press-on, twist-off closure for a container having threads in the neck finish is made of a hard plastic shell having a top and a peripheral skirt. A gasket member is provided on the inside of the shell located adjacent the top and the shell skirt. The gasket member has resilient defor

An all-plastic press-on, twist-off closure for a container having threads in the neck finish is made of a hard plastic shell having a top and a peripheral skirt. A gasket member is provided on the inside of the shell located adjacent the top and the shell skirt. The gasket member has resilient deformable ribs for engaging the threads and the gasket member and the shell skirt are held together against rotation with respect to each other by interlocking spline means on the shell skirt and the gasket member skirt.

대표청구항 ▼

A closure for a container, the container comprising a neck finish area with tenerally helical threads, the closure comprising a cap having a top and a peripheral skirt of a hard, flexible thermoplastic material, a gasket member of resilient plastic located next to the shell of the cap, the gasket me

A closure for a container, the container comprising a neck finish area with tenerally helical threads, the closure comprising a cap having a top and a peripheral skirt of a hard, flexible thermoplastic material, a gasket member of resilient plastic located next to the shell of the cap, the gasket member including a skirt located just inside and concentric with the shell skirt, there being a plurality of ribs in the gasket material on the inside thereof for deformation around the threads of the container when the cap is closed over the threads, the area of the ribs being less than about 10% of the circumferential area of the gasket on the skirt, there being sufficient ribs spaced apart to adequately retain the cap on the container when subject to abuses from shipping and handling, the plastic gasket material and plastic cap shell being held together by vertical interlocking spline means on the cap skirt and the gasket skirt, the spline means being so constructed and arranged that the gasket member will not rotate with respect to the shell when the closure is twisted off the container, the spline means including a plurality of spaced apart vertical splines and vertical corresponding cooperating grooves.