Envelopes – wrappers – and paperboard boxes – Paperboard box – End structure
Patent
1984-05-22
1985-12-24
Moy, Joseph Man-Fu
Envelopes, wrappers, and paperboard boxes
Paperboard box
End structure
229 57, 220 66, B65D 310
Patent
active
045600635
ABSTRACT:
A paper container has a bottom in which there is impressed a deformation groove to allow the bottom to deform in response to reduced internal pressures occurring as a hot liquid cools inside of the closed container. The bottom is formed in a continuous one-step process in which a series of coaxially arranged, telescoping tools travel relative to one another along a common axis to form the bottom with the deformation groove and a bent outer edge.
REFERENCES:
patent: 2190990 (1940-02-01), Link
patent: 4008846 (1977-02-01), Gordon
patent: 4098404 (1978-07-01), Markert
patent: 4120419 (1978-10-01), Saunders
patent: 4147271 (1979-04-01), Yamaguchi
patent: 4266685 (1981-05-01), Lee, Jr.
patent: 4341321 (1982-07-01), Gombas
patent: 4431112 (1984-02-01), Yamaguchi
Man-Fu Moy Joseph
Michael Horauf Maschinenfabrik GmbH & Co. KG
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