Method of and an apparatus for manufacturing a ring-pull bottle cap
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United States of America Patent
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Feb 11, 1986
Grant Date -
N/A
app pub date -
Jan 30, 1984
filing date -
Feb 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of manufacturing a bottle cap provided with a ring-pull is disclosed, in which a band is cut from a metal strip by shears and is simultaneously curled up, by shear bow, to form a cylindrical band with overlapping ends, while a bottle cap portion with a tab is prepared separately from another metal sheet. Then, the cylindrical band is firmly connected to the tab of the cap by rolling the cylindrical band up from one edge, to form a toroid while rolling the tab up into the band. The method may be carried out using apparatus including a transporting turret for transferring the cylindrical band to a pulling ring former for forming the pulling ring, a feeder for feeding the bottle cap to a turret anvil carried by the turret; a pressing device for urging a bottle cap tap against the cylindrical band; a roller mechanism for rolling the bottle cap tab and the cylindrical band up to form the pulling ring while joining the latter to the bottle cap; and a device for embossing the region of the joint between the pull-ring and the tear tab. The invention allows bottle caps with ring-pulls to be produced on a mass production basis with minimum loss of material.
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