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AssigneePortola Packaging, Inc.
InventorsLaszlo G. Sandor, Daniel Luch, Richard E. Repp
Estimating the term…
The neck of a container has a smooth seal surface engaged by the inner skirt or plug of a cap. Such surface is free of trim and parting line flaws which are characteristic of blow-molded jars because the surface is formed in such a way that the seal surface is not in contact with mold parting lines and further the trim of the neck (excess plastic) is located away from the sealing surface. In one form of the disclosure, above the sealing surface the neck wall slants outward and then bends upward-inward in a short, tapered stretch about 18.degree. to the horizontal which engages the underside of the cap disk to compress against the disk or a liner or foil. In another form of the invention, above the seal surface the neck extends outward and the upward and then inward in a flange which is trimmed along a line which has a circumference no less than the circumference of the seal surface. The exterior of the neck is formed with shoulders which engage over locking beads on the interior of the outer skirt of the cap.
A neck for a blow-molded plastic container for use with a cap having a top, an outer skirt depending from the top and a plug substantially vertically depending from the top, the plug being located inward of the outer skirt with an annular gap between the skirt and the plug, said neck comprising a sealing portion having a smooth, internal circumferential primary seal surface characterized by the absence of mold parting lines positioned and dimensioned to sealingly engage the plug, an outward bend at an upper end of said sealing portion, an outward extending stretch beyond said outward bend, an upward-inward bend at an outer end of said outward extending stretch, and an inwardly-upwardly extending flange beyond said upward-inward bend, said flange terminating at a trim line having a circumference greater than that of said sealing portion so that said trim line does not engage the plug of the cap to form a primary seal, whereby said trim line is outward of the plug of the cap in the assembled position of said neck and the cap, said flange being thin and flexible.
In combination, a neck for a blow molded plastic container and a cap, said cap having a top, an outer skirt depending from said top and a plug substantially vertically depending from said top, said plug being located inward of said outer skirt with an annular gap between said outer skirt and said plug, said neck comprising a sealing portion having a smooth, internal circumferential primary seal surface characterized by the absence of mold parting lines sealingly engaging said plug, an outward bend at an upper end of said sealing portion, an outward extending stretch beyond said outward bend, an upward-inward bend at an outer end of said outward extending stretch, and an inwardly-upwardly extending flange beyond said upward-inward bend, said flange terminating at a trim line having a circumference greater than that of said sealing portion, said trim line being spaced from said plug and not sealing against said plug, said trim line being located outward of said plug, said outward bend, outward extending stretch, upward-inward bend and flange being located in said annular gap.
A neck for a blow-molded plastic container for use with a cap having a top, an outer skirt depending from the top and a plug substantially vertically depending from the top, the plug being located inward of the outer skirt with an annular gap between the skirt and the plug, said neck comprising a sealing portion having a smooth, internal circumferential primary seal surface characterized by the absence of mold parting lines positioned and dimensioned to sealingly engage the plug, an outward bend at an upper end of said sealing portion, an outward extending stretch beyond said outward bend, an upward-inward bend at an outer end of said outward extending stretch, and an inwardly-upwardly extending flange beyond said upward-inward bend, said flange terminating at a trim line having a circumference greater than that of said sealing portion whereby said trim line is outward of the plug of the cap in the assembled position of said neck and the cap, said flange being thin and flexible, a horizontal distance between said sealing portion and said upward-inward bend being greater than a vertical distance between a midpoint on said sealing portion and said trim line.
In combination, a neck for a blow molded plastic container and a cap, said cap having a top, an outer skirt depending from said top and a plug substantially vertically depending from said top, said plug being located inward of said outer skirt with an annular gap between said outer skirt and said plug, said neck comprising a sealing portion having a smooth, internal circumferential primary seal surface characterized by the absence of mold parting lines sealingly engaging said plug, an outward bend at an upper end of said sealing portion, an outward extending stretch beyond said outward bend, an upward-inward bend at an outer end of said outward extending stretch, and an inwardly-upwardly extending flange beyond said upward-inward bend, said flange terminating at a trim line having a circumference greater than that of said sealing portion, said trim line being located outward of said plug, said outward bend, outward extending stretch, upward-inward bend and flange being located in said annular gap, a horizontal distance between said sealing portion and said upward-inward bend being greater than a vertical distance between a midpoint on said sealing portion and said trim line.
An intermediate article of manufacture for subsequent trimming to form a neck for a blow-molded plastic container for use with a cap having a top, an outer skirt depending from the top and a hollow plug substantially vertical depending from the top, the plug being located inward of the outer skirt with an annular gap between the skirt and the plug, said article of manufacture comprising a sealing portion having a smooth, internal, circumferential primary seal surface characterized by the absence of mold parting lines positioned and dimensioned to sealingly engage the plug, an outward bend at an upper end of sealing portion, an outward extending stretch beyond said outward bend, an upward-inward bend at an outer end of said outward extending stretch, and an inwardly-upwardly extending flange beyond said upward-inward bend, said flange having a terminus having a circumference greater than said sealing portion, and a blow dome extending upwardly-outwardly of said terminus, said terminus comprising a trim line for subsequently trimming off said blow dome.
Dependencies are inferred from the claim text.