Package making – Interrelated or safety controls
Patent
1975-02-18
1976-07-27
Silbaugh, Jan H.
Package making
Interrelated or safety controls
53140, 264 94, 264235, 264238, 264346, B29C 1707, B29C 2500, B65B 4300
Patent
active
039711730
ABSTRACT:
This disclosure relates to a process of reducing the creep characteristics of plastic containers, principally bottles, jugs or the like, by providing a cartridge having upper and lower ends and a plurality of vertically extending transversely inter-connected chambers also having upper and lower ends, blow molding a plurality of containers, stacking the blow molded containers vertically upwardly through the lower ends of the chambers toward the upper ends thereof atop and in contact with each other in an upright position in each chamber, transferring the cartridge into a heat treatment bay, circulating hot air in contact with the plastic containers in a direction upwardly from and through the lower ends through the upper ends in an open condition and through and between the chambers for a predetermined period of time and at a predetermined temperature sufficient to reduce the creep characteristics of the plastic containers, and removing the cartridge from the heat treatment bay.
REFERENCES:
patent: 1885691 (1932-11-01), Dressler
patent: 2344640 (1944-03-01), Rogers
patent: 3317642 (1967-05-01), Bailey
patent: 3561188 (1971-02-01), Cleland
patent: 3886253 (1975-05-01), Friendship
Continental Can Company Inc.
Silbaugh Jan H.
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