Patent US4230233A successfully refreshed from Google Patents.
US4230233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End panel for carton
Assignee: AMERICAN FOREST PRODUCTS COMPANY A CALIF LP
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Filing: 1978-11-06
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Granted: 1980-10-28
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Expires: 1998-11-06
Abstract
Abstract A molded plastic carton end includes a thin face panel reinforced by molded ribs and bounded on four sides by rim sections each comprising a plurality of parallel walls abutting against a face member with closely spaced cross members to add additional stiffness and resistance to crushing. The multiple walls also provide a plurality of parallel layers to receive and hold nails for attaching side, top and bottom members to complete the carton. The walls intersect at the corners, thus forming a large number of individual box sections at each corner, making the corners of the carton end very resistant to deformation. A number of plastic materials and fillers may be used including polyethylene filled with wood and/or a limited amount of a blowing agent.
Inventors
- 👤 Robert P. Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:53
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
275 words
In a container having top, bottom and side panels: a pair of end panels to which said top, bottom and side panels are fastened, each said end panel comprising a molded frame of high density plastic, said frame including a face panel of area significantly more than half of the area of said end panel, top, bottom and side rim sections attached around the periphery of said face panel and of a depth equal to the desired thickness of said end panel, said face panel being attached to the inside edges of said rim sections, a plurality of ribs extending across said face panel between at least two of said rim sections, each of said side rim sections comprising an inside wall extending the entire height of said end panel, an outside wall, a plurality of internal walls spaced between and parallel to said inside and outside walls extending the entire height of said end panel and a plurality of reinforcing cross members extending between said inside wall and said outside wall, each of said top and bottom rim sections comprising an inside wall extending the entire width of said end panel, an outside wall intersecting the outside walls of said side rim sections, a plurality of internal walls spaced between and parallel to said inside and outside walls of said top and bottom rim sections and extending the entire width of said top and bottom panels and a plurality of reinforcing cross members extending between said inside and outside walls, said face panel being attached to and framed by adjoining internal edges of said inside walls of said top, bottom and side rim sections.
Claim 2
Dependent Claim
275 words
In a container having top, bottom and side panels: a pair of end panels to which said top, bottom and side panels are fastened, each said end panel comprising a molded frame of high density plastic, said frame including a face panel of area significantly more than half of the area of said end panel, top, bottom and side rim sections attached around the periphery of said face panel and of a depth equal to the desired thickness of said end panel, said face panel being attached to the inside edges of said rim sections, a plurality of ribs extending across said face panel between at least two of said rim sections, each of said side rim sections comprising an inside wall extending the entire height of said end panel, an outside wall, a plurality of internal walls spaced between and parallel to said inside and outside walls extending the entire height of said end panel and a plurality of reinforcing cross members extending between said inside wall and said outside wall, each of said top and bottom rim sections comprising an inside wall extending the entire width of said end panel, an outside wall intersecting the outside walls of said side rim sections, a plurality of internal walls spaced between and parallel to said inside and outside walls of said top and bottom rim sections and extending the entire width of said top and bottom panels and a plurality of reinforcing cross members extending between said inside and outside walls, said face panel being attached to and framed by adjoining internal edges of said inside walls of said top, bottom and side rim sections.
Claim 3
Dependent Claim
16 words
A container as claimed in claim 1 wherein said face panel includes a plurality of openings.
Claim 4
Dependent Claim
24 words
A container as claimed in claim 2 wherein the inside edges of said openings are rounded to avoid damaging the contents of said container.
Claim 5
Dependent Claim
41 words
A container as claimed in claim 1 wherein said inside walls, said internal walls and said outside walls of said side rim sections intersect and support the inside walls, internal walls and outside walls of said top and bottom rim sections.
Claim 6
Dependent Claim
29 words
A container as claimed in claim 2 wherein said ribs extending across said face panel include a plurality of vertical ribs extending between said top and bottom rim sections.
Claim 7
Dependent Claim
40 words
A container as claimed in claim 1 wherein the edges of said outside walls, said internal walls and said inside walls are open toward the inside of said container and covered with a facing toward the outside of said container.
Claim 8
Dependent Claim
17 words
A container as claimed in claim 1 wherein said high density plastic comprises polyethylene filled with paper.
Claim 9
Dependent Claim
18 words
A container as claimed in claim 1 wherein said high density plastic comprises polyethylene filled with wood sawdust.
Claim 10
Dependent Claim
14 words
A container as claimed in claim 1 wherein said high density plastic comprises polystyrene.
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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |