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US4442970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package for liquids
Assignee: PKL PAPIER-UND KUNSTOFF WERKE LINNICH A GERMAN CORP GmbH
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Filing: 1982-05-06
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Granted: 1984-04-17
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Expires: 2002-05-06
Abstract
Abstract In a blank for folding into a parallelepipedal package that is intended for liquids, the blank having an area that is to be folded into a double-M closure for a gable-shape top having inwardly folded opposite triangular sections and a middle fold line, the improvement which comprises providing each of said opposite triangular sections with a slit that slants from the upper edge down to or slightly beyond the middle fold line, whereby the folded package has an improved seal. When the cross-section is square, the slits should be parallel so that the folded areas dogleg and overlap.
Inventors
- 👤 Jurgen Farber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:14
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/067; B65D5/068
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
In a plastic-coated cardboard blank for folding into a parallelepipedal package that is intended for liquids, the blank having opposite triangular areas that are to be folded inwardly into a double-M closure for a gable-shaped top and such areas each has an upper edge and a middle fold line extending to the apex of said triangular area, the improvement which comprises providing each of said opposite triangular areas with a slit that slants from the upper edge down to at least to the middle fold line to form a non-folding flap, whereby the folded package has an improved seal.
Claim 2
Dependent Claim
99 words
In a plastic-coated cardboard blank for folding into a parallelepipedal package that is intended for liquids, the blank having opposite triangular areas that are to be folded inwardly into a double-M closure for a gable-shaped top and such areas each has an upper edge and a middle fold line extending to the apex of said triangular area, the improvement which comprises providing each of said opposite triangular areas with a slit that slants from the upper edge down to at least to the middle fold line to form a non-folding flap, whereby the folded package has an improved seal.
Claim 3
Dependent Claim
37 words
A blank according to claim 1 for folding into a package of square cross-section, wherein the slits in the blank are parallel so that when the package is folded closed the folded areas may dogleg and overlap.
Claim 4
Dependent Claim
10 words
A package produced by folding the blank of claim 1.
Claim 5
Dependent Claim
19 words
A package of square cross-section produced by folding the blank of claim 2, the folded areas dogleg and overlap.
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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |