Reinforcing ring construction for containers

Details Reinforcing ring construction for containers Reinforcing ring construction for containers

1986-02-05

1987-11-24

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Paperboard box

End structure

220 73, 229 56, 229 57, B65D 330

Patent

active

047082836

ABSTRACT:
In a metal reinforcing ring applied to the top edge of a paperboard container, an improved construction which avoids presenting any sharp edges by curling the lower edge of the reinforcing ring under a shoulder on the inside of the container such that the lower edge of the ring is butted against the inside container surface at an unexposed location. Special crimping rolls apply the reinforcing ring to the top edge of the container.

REFERENCES:
patent: 1256933 (1918-02-01), Schriner
patent: 1700164 (1929-01-01), Hulbert
patent: 1702606 (1929-02-01), Hulbert
patent: 2170436 (1939-08-01), Vogel
patent: 2185171 (1940-01-01), Brown
patent: 3596827 (1971-08-01), Kinney

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