Mould for closure caps with intermittent threads undercuts or ho

Details Mould for closure caps with intermittent threads undercuts or ho Mould for closure caps with intermittent threads undercuts or ho

1975-11-10

1977-04-26

Flint, Jr., J. Howard

Static molds

Forming helical or threaded product

249 68, 249180, 249184, 425DIG5, 425DIG58, 425438, B29F 114, B29D 1500, B29C 700

Patent

active

040197115

ABSTRACT:
A core is provided, useful in the manufacture of closure caps, each closure cap having a top, dependent skirt and securing means, comprising intermittent or interrupted threads or hold-down lugs.
The core means having a top forming portion; a plurality of skirt forming portions, circumferentially separated by a plurality of generally axially disposed channels in the outer peripheral wall of the core, each channel extending from at least a point intermediate the length of the core to the top forming portion and having its bed sloped generally radially inwardly in a direction towards said top forming portion from a position adjacent the other end of the channel; a plurality of riser segments corresponding to the plurality of channels, each riser segment secured for slidable movement within its corresponding channel, relative to the core, from a position completely within the channel having one end proximate the top forming portion of the core, to a position on the side of the top forming portion, remote the other end of the core, each riser segment being of substantially the same thickness as the corresponding depth of the channel in which it is situate when such end of the riser is proximate the top forming portion of the core so as to form on the outer periphery of such end of each riser, a top forming portion to co-act with the top forming portion of the core when juxtaposed therewith and skirt and securing means forming portions; means securing said riser segments within said channels.

REFERENCES:
patent: 2327665 (1943-08-01), Peat
patent: 2676372 (1954-04-01), Venner et al.
patent: 2799049 (1957-07-01), Wilson
patent: 2948031 (1960-08-01), Webb
patent: 3247548 (1966-04-01), Fields et al.
patent: 3482814 (1969-12-01), Hedgewick
patent: 3482815 (1969-12-01), Naturale
patent: 3534443 (1970-10-01), Tucker
patent: 3584111 (1971-06-01), Allison
patent: 3660001 (1972-05-01), Roehr
patent: 3865529 (1975-02-01), Gugzo
patent: 3904165 (1975-09-01), Boer
patent: 3940103 (1976-02-01), Hilaire

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