US3924803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy-opening packaging for melted or semi-liquid substances
Assignee: Samos SARL
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Filing: 1974-04-24
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Granted: 1975-12-09
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Expires: 1994-04-24
Abstract
Abstract A container is made of a first sheet of flexible material from which is cut out a blank forming the bottom and, by successive folding, the sides, the sides of the blank having edge flaps folded down and welded to a second flat sheet forming the cover or top. The folding is effected in such a way that the folded-down flap of one side wall provides a single thickness, substantially rectangular tear strip whose lateral edges are defined by double thickness triangular portions. This tear strip is formed in the first sheet so that, by grasping the end of the tear strip, the latter may be torn from the folded-down flap, the main portion of the adjacent side wall and at least the bottom wall of the container to open the container.
Inventors
- 👤 Habsburg Dominic De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:07
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/28; B65D85/00; B65D85/70; B65D85/72; B65D85/76
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
276 words
A container, for meltable or semi-liquid substances, comprising, in combination, a first sheet of flexible material having only one surface which is weldable to similar material; said surface facing the interior of said container said first sheet defining, through rectilinear fold lines, a polygonal container bottom and container sides extending peRpendicularly upwardly from said bottom at the fold lines defining said bottom; said container sides having rectilinear fold lines in spaced parallel relation to said bottom and defining respective edge flaps at their upper edges, a second sheet of flexible material having only one surface which is weldable to similar material, said surface facing outwardly of said container said second sheet being congruent with said bottom and positioned on top of a substance filled into said container to the level of the fold lines defining said edge flaps; one of said edge flaps being wider than the other edge flaps and being folded on itself to form triangular double thickness end portions separated by a single thickness rectangular portion whereby said one edge flap is trapezoidal; the contacting surfaces of said double thickness end portions being welded only to each other; said other edge flaps being folded against and welded to said second sheet and said one edge flap being folded over said second sheet with only said single thickness rectangular portion welded thereto; said one edge flap constituting a pull tab, reinforced by said double thickness end portions not welded to said second sheet for tearing away at least the major portion of the side wall having said one edge flap and at least the major portion of said bottom to expose the filled-in substance.
Claim 2
Dependent Claim
276 words
A container, for meltable or semi-liquid substances, comprising, in combination, a first sheet of flexible material having only one surface which is weldable to similar material; said surface facing the interior of said container said first sheet defining, through rectilinear fold lines, a polygonal container bottom and container sides extending peRpendicularly upwardly from said bottom at the fold lines defining said bottom; said container sides having rectilinear fold lines in spaced parallel relation to said bottom and defining respective edge flaps at their upper edges, a second sheet of flexible material having only one surface which is weldable to similar material, said surface facing outwardly of said container said second sheet being congruent with said bottom and positioned on top of a substance filled into said container to the level of the fold lines defining said edge flaps; one of said edge flaps being wider than the other edge flaps and being folded on itself to form triangular double thickness end portions separated by a single thickness rectangular portion whereby said one edge flap is trapezoidal; the contacting surfaces of said double thickness end portions being welded only to each other; said other edge flaps being folded against and welded to said second sheet and said one edge flap being folded over said second sheet with only said single thickness rectangular portion welded thereto; said one edge flap constituting a pull tab, reinforced by said double thickness end portions not welded to said second sheet for tearing away at least the major portion of the side wall having said one edge flap and at least the major portion of said bottom to expose the filled-in substance.
Claim 3
Dependent Claim
19 words
A container for meltable or semi-liquid substances, as claimed in claim 1, in which said bottom is a triangle.
Claim 4
Dependent Claim
19 words
A container for meltable or semi-liquid substances, as claimed in claim 1, in which said bottom is a rectangle.
Claim 5
Dependent Claim
19 words
A container for meltable or semi-liquid substances, as claimed in claim 1, in which said bottom is a square.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |