초록 ▼

Neck finishes suitable for containers formed of rigid materials are shaped to overcome problems which would otherwise occur if standard closures which perform satisfactorily with less rigid containers are used. One problem is that plugs (inner skirts) of closures are cut or shaved if they are oversi

Neck finishes suitable for containers formed of rigid materials are shaped to overcome problems which would otherwise occur if standard closures which perform satisfactorily with less rigid containers are used. One problem is that plugs (inner skirts) of closures are cut or shaved if they are oversize relative to the inner neck diameter. This problem is overcome by forming a chamfer or radius at the lead-in to the inside corner of the neck. A second problem (“ovality”) occurs when the neck is not uniformly round; this problem is overcome by forming a cut-out section at the upper outer corner of the neck so that the maximum neck diameter engages the inside of the outer cap skirt below the top edge, thereby lessening outward distortion of the outer skirt.

대표청구항 ▼

A container neck formed of a rigid plastic material which is subject to distortion into an oval shape comprising a side wall having inner and outer wall surfaces, a lip at the top of said side wall, a rim around said outer wall surface having a rim top joined to said lip and terminating in an outer

A container neck formed of a rigid plastic material which is subject to distortion into an oval shape comprising a side wall having inner and outer wall surfaces, a lip at the top of said side wall, a rim around said outer wall surface having a rim top joined to said lip and terminating in an outer upper corner, the outside of said rim being substantially greater in size than said outer wall surface, said rim comprising a continuous peripheral locking bead, characterized in that said outer upper corner of said rim is formed with a cutout defined in part by a downward extending upper outer wall of said rim below said rim top being greater in size than said outer wall surface for a distance approximately half the height of said rim and below said upper outer wall said rim cutout slants downward-outward in a lower outer wall which intersects the bottom of said rim to form a contact point spaced downward from said rim top.