US4378904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible open side carton
Assignee: WestRock Minnesota Corp
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Filing: 1981-09-02
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Granted: 1983-04-05
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Expires: 2001-09-02
Abstract
Abstract The carton is made from a one-piece blank which is erectable to an expanded condition from a flattened condition. The assembled carton is folded to the flattened condition at the point of manufacture for shipping to the point of filling. At the point of filling the flattened carton is expanded and the contents are placed in it. The carton has free end inwardly extending side wall panels which engage the end wall panels of the carton to hold the carton in the expanded condition.
Inventors
- 👤 Duane R. Mode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:58
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/36; B65D5/3607
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A collapsible paperboard carton comprising: (a) opposed front and back panels; (b) opposed end panels foldably connected to opposite ends of said front and back panels; and (c) opposed side panels foldably connected to opposite sides of one of said front and back panels, said side panels being free of connection with said end panels and the other of said front and back panels, said side panels being folded inwardly into the confines of said carton in face-to-face engagement with said front and back panels when said carton is in a flattened collapsed form, and said side panels, due to the inherent springiness of the paperboard, being operable to swing to a position disposed at an acute angle with respect to said one of said front and back panels, when said carton is in an expanded form and at least one end edge of each of said side panels being disposed in engagement with at least one of said end panels to retain said carton in said expanded form.
Claim 2
Dependent Claim
169 words
A collapsible paperboard carton comprising: (a) opposed front and back panels; (b) opposed end panels foldably connected to opposite ends of said front and back panels; and (c) opposed side panels foldably connected to opposite sides of one of said front and back panels, said side panels being free of connection with said end panels and the other of said front and back panels, said side panels being folded inwardly into the confines of said carton in face-to-face engagement with said front and back panels when said carton is in a flattened collapsed form, and said side panels, due to the inherent springiness of the paperboard, being operable to swing to a position disposed at an acute angle with respect to said one of said front and back panels, when said carton is in an expanded form and at least one end edge of each of said side panels being disposed in engagement with at least one of said end panels to retain said carton in said expanded form.
Claim 3
Dependent Claim
57 words
The carton of claim 1 further comprising a bridging panel foldably connected to each of said front and back panels and extending between said front and back panels medially thereof, said bridging panel being substantially parallel to said end panels to strengthen the medial portion of said carton and to divide said carton in two adjacent compartments.
Claim 4
Dependent Claim
32 words
The carton of claim 1, wherein each of said side panels has a free side edge configured to positively engage articles disposed in said carton to retain said articles in said carton.
Claim 5
Dependent Claim
74 words
The carton of claim 1 wherein said front, back and end panels define an acute angle parallelogram when said carton is in said expanded form and further comprising support feet tabs cut from a fold line interconnecting one of said end panels with one of said front and back panels, said support feet tabs projecting beyond said fold line to provide means for supporting said carton upright on said one of said end panels.
References Cited (Backward Citations)
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US3931888A
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US4037721A
Cited
US4130202A
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US4149636A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |