Envelopes – wrappers – and paperboard boxes – Paperboard box – Window or transparent portion
Patent
1990-02-09
1991-07-16
Elkins, Gary E.
Envelopes, wrappers, and paperboard boxes
Paperboard box
Window or transparent portion
206 4534, B65D 542
Patent
active
050318268
ABSTRACT:
A round container which is intended for dispatch in the empty state possesses a side wall and at least one closure wall, sealingly and firmly inset into the side wall at an angle to it, which closure wall is for example a base. The side wall consists at least partly of a transparent sheet part having a thickness of 130 to 500 .mu.m. To enable a part of the side wall to be printed in an appealing form and the intrinsic stiffness of the round container to be improved in spite of the viewing facility provided, the edge of the side wall towards the closure wall is formed, around the periphery, at least partly as cardboard part from a cardboard material having a weight per unit area of at least 150 g/m.sup.2, sheet part and cardboard part not overlapping each other in a partial region serving as viewing opening. Furthermore, the transparent sheet part extends, at least a portion of the periphery, as far as the edge of the side wall remote from the closure wall and is of a single-layer, hard transparent sheet, preferably free of plasticizer or having low plasticizer content, which possesses the aforementioned thickness of 130 to 500 .mu.m and, finally, the transparent sheet part and the cardboard part overlap each other at the edge of the viewing opening within the side wall and are firmly connected together in the overlap zone.
REFERENCES:
patent: 2164354 (1939-07-01), Schrier
patent: 2172864 (1939-09-01), Calva et al.
patent: 2189955 (1940-02-01), Hokerk
patent: 2226340 (1940-12-01), Flood
patent: 2551090 (1951-05-01), Bergstein
patent: 3199670 (1965-08-01), Palmer
patent: 3400878 (1968-09-01), Heller, Jr. et al.
patent: 3487991 (1970-01-01), Stern
patent: 3746242 (1973-07-01), Troth
patent: 4733916 (1988-03-01), Seufert
patent: 4826004 (1989-05-01), Dupuy
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