US3913823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper product foldable manually to form a non-leaking container
Assignee: Individual
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Filing: 1974-05-29
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Granted: 1975-10-21
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Expires: 1994-05-29
Abstract
Abstract The present invention relates to a paper product which can be folded manually to form a non-leaking container, particularly to a paper sheet having proper hardness, one surface being treated with water-proof materials and having a plurality of fold lines roll-pressed thereinto, such that the product can be folded to a very small size for carrying or storage, and can be manually folded about said fold lines to form a non-leaking container.
Inventors
- 👤 Tenhon Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:09
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/20; B65D5/24; B65D5/248; B65D5/42; B65D5/56; B65D5/62; B65D5/72; B65D5/721; Y; Y10; Y10S; Y10S229/00; Y10S229/941
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
A blank of foldable sheet material for forming a leaktight container for liquids comprising: a multi-sided, bottom-forming panel substantially centrally of said blank; a plurality of wallforming panels joined to the sides of said bottom-forming panel along a continuous fold line; corner panels substantially commensurate in width with the wall-forming panels and joined along fold lines to adjacent edge portions of the wall-forming panels, said corner panels each having a diagonally extending fold line therein extending outwardly from said continuous fold line; a locking panel joined along a fold line to an outer edge portion of each wall-forming panel in an opPosed pair of said wall-forming panels, each of said locking panels having a slit therein extending inwardly from an outer edge portion thereof toward the fold line joining the locking panel with a respective wall-forming panel; and a fold line extending diagonally outwardly from an inner end of the slit to an adjacent outer corner of the respective locking panels, thus defining a pair of generally triangularly shaped locking flaps on each of said locking panels, whereby the blank may be folded along said fold lines to dispose said wall-forming panels in an upright position and said corner panels folded inwardly over an exterior surface of said opposed pair of wall-forming panels and the locking panels folded downwardly over said pair of wall-forming panels and the locking flaps folded inwardly and upwardly beneath the corner panels to form a leaktight container for liquids and the like.
Claim 2
Dependent Claim
247 words
A blank of foldable sheet material for forming a leaktight container for liquids comprising: a multi-sided, bottom-forming panel substantially centrally of said blank; a plurality of wallforming panels joined to the sides of said bottom-forming panel along a continuous fold line; corner panels substantially commensurate in width with the wall-forming panels and joined along fold lines to adjacent edge portions of the wall-forming panels, said corner panels each having a diagonally extending fold line therein extending outwardly from said continuous fold line; a locking panel joined along a fold line to an outer edge portion of each wall-forming panel in an opPosed pair of said wall-forming panels, each of said locking panels having a slit therein extending inwardly from an outer edge portion thereof toward the fold line joining the locking panel with a respective wall-forming panel; and a fold line extending diagonally outwardly from an inner end of the slit to an adjacent outer corner of the respective locking panels, thus defining a pair of generally triangularly shaped locking flaps on each of said locking panels, whereby the blank may be folded along said fold lines to dispose said wall-forming panels in an upright position and said corner panels folded inwardly over an exterior surface of said opposed pair of wall-forming panels and the locking panels folded downwardly over said pair of wall-forming panels and the locking flaps folded inwardly and upwardly beneath the corner panels to form a leaktight container for liquids and the like.
Claim 3
Dependent Claim
53 words
A blank of sheet material as in claim 1 wherein the blank comprises a paper material and the fold lines joining the locking panels to an outer edge portion of the wall-forming panels are spaced slightly outwardly from the adjacent edges of the corner panels to facilitate outward bending of the locking panels.
Claim 4
Dependent Claim
23 words
A blank as in claim 2, wherein the width of the locking panels is slightly less than the weight of the wall panels.
Claim 5
Dependent Claim
53 words
A blank as in claim 3, wherein an easily bendable metal strip is affixed to one of said wall-forming panels adjacent an outer edge portion thereof, whereby the metal strip may be bent to retain the wall forming panel in a substantially V-shaped configuration when the panel is erected to facilitate use thereof.
Claim 6
Dependent Claim
254 words
A manually foldable container for liquids and the like comprising: an imperforate bottom panel having opposite side edges; a plurality of upright, imperforate wall panels extending upwardly from the edges of said bottom panel and connected to the bottom panel by a continuous fold line; outwardly folded, triangularly shaped corner members connected by fold lines to adjacent edge portions of adjacent side wall panels, the fold line connections of the corner members to the wall panels being substantially coextensive with the height of said wall panels and the corner member fold lines terminating at said continuous fold line; said corner members folded in overlying relation with respect to an exterior surface of an opposed pair of said wall panels; said corner members having upwardly converging lower edge portions; a locking panel member joined along a fold line to an upper edge portion of each of the wall panels of said pair and each having a free edge portion parallel to said fold line and having a slit therein extending inwardly from said free edge toward said fold line, said locking panel member folded downwardly over the corner members and a pair of wall panels; and a pair of fold lines extending diagonally outwardly from the inner end of the slit to opposite ends of said free edge thus defining a pair of locking flaps on the free edges of said locking panel members, said locking flaps folded inwardly beneath the converging edges of the corner members to thus maintain said container in erected position.
Claim 7
Dependent Claim
254 words
A manually foldable container for liquids and the like comprising: an imperforate bottom panel having opposite side edges; a plurality of upright, imperforate wall panels extending upwardly from the edges of said bottom panel and connected to the bottom panel by a continuous fold line; outwardly folded, triangularly shaped corner members connected by fold lines to adjacent edge portions of adjacent side wall panels, the fold line connections of the corner members to the wall panels being substantially coextensive with the height of said wall panels and the corner member fold lines terminating at said continuous fold line; said corner members folded in overlying relation with respect to an exterior surface of an opposed pair of said wall panels; said corner members having upwardly converging lower edge portions; a locking panel member joined along a fold line to an upper edge portion of each of the wall panels of said pair and each having a free edge portion parallel to said fold line and having a slit therein extending inwardly from said free edge toward said fold line, said locking panel member folded downwardly over the corner members and a pair of wall panels; and a pair of fold lines extending diagonally outwardly from the inner end of the slit to opposite ends of said free edge thus defining a pair of locking flaps on the free edges of said locking panel members, said locking flaps folded inwardly beneath the converging edges of the corner members to thus maintain said container in erected position.
Claim 8
Dependent Claim
38 words
A container as in claim 5, wherein said corner members are substantially commensurate in height with the height of the wall panels, and the locking panel members are slightly in width than the height of the wall panels.
Claim 9
Dependent Claim
53 words
A container as in claim 5, wherein a bendable metal strip is affixed to one of the wall panels adjacent an upper edge thereof, such that the metal strip may be bent outwardly to form a V-shaped notch in the upper edge portion of the wall panel to facilitate pouring of liquid therefrom.
Claim 10
Dependent Claim
34 words
A container as in claim 7, wherein the container comprises a paper material and the inner surfaces of the container are coated with a water-proofing material to enable use of the container with liquids.
Claim 11
Dependent Claim
54 words
A container as in claim 8, wherein a substantially U-shaped reinforcing mEmber of cardboard and the like has a bottom portion disposed in underlying relationship to the bottom panel of the container, and a pair of upstanding side portions inserted between the opposed pair of wall panels and the locking panel members folded thereover.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |