Patent US3761009A successfully refreshed from Google Patents.
US3761009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety carton with spring lock
Assignee: Burt & Co F N
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Filing: 1971-12-27
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Granted: 1973-09-25
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Expires: 1991-12-27
Abstract
Abstract The rectangular carton comprises a base or receptacle member slidable within a sleeve member, the receptacle member being longer than the sleeve member by approximately twice the thickness of the walls of the members, and the end walls of the receptacle being slight higher than the side walls. The sleeve member is of one-piece construction and an inner extension of one of its side walls comprises a resiliently yieldable panel extending across the bottom of the sleeve member and having its terminal portion secured to the bottom wall by means of a glue flap. The bowed resilient extension urges the receptacle upwardly when the latter is disposed within the sleeve so that the upward extensions of the end walls of the receptacle project and embrace the top wall of the sleeve and thus prevent removal of the receptacle until an end thereof is depressed against the urging of the bowed resilient spring-lock extension.
Inventors
- 👤 C Rosenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:48
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/38; Y; Y10; Y10S; Y10S206/00; Y10S206/817
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A substantially parollelepiped shaped carton made of sheet material and comprising a sleeve member and a receptacle member just barely longer than the sleeve member and adapted to slide to and from closed position within said sleeve member, said receptacle member having fore-and-aft end walls of slightly greater height than its side walls, the sleeve member containing a resiliently yieldable element within the lower portion thereof and adapted, when the receptacle is freely enclosed within the sleeve member, to elevate the receptacle the approximate distance equal to the difference in height Of the end and side walls of the receptacle, whereby the upper edge portions of said end walls embrace the top wall of the sleeve and act as abutments preventing removal of said receptacle from the sleeve until an end portion of the receptacle is depressed against the resilience of said yieldable element.
Claim 2
Dependent Claim
144 words
A substantially parollelepiped shaped carton made of sheet material and comprising a sleeve member and a receptacle member just barely longer than the sleeve member and adapted to slide to and from closed position within said sleeve member, said receptacle member having fore-and-aft end walls of slightly greater height than its side walls, the sleeve member containing a resiliently yieldable element within the lower portion thereof and adapted, when the receptacle is freely enclosed within the sleeve member, to elevate the receptacle the approximate distance equal to the difference in height Of the end and side walls of the receptacle, whereby the upper edge portions of said end walls embrace the top wall of the sleeve and act as abutments preventing removal of said receptacle from the sleeve until an end portion of the receptacle is depressed against the resilience of said yieldable element.
Claim 3
Dependent Claim
27 words
The carton as set forth in claim 1 in which said resilient yieldable element comprises a panel of the same material as the sleeve and receptacle member.
Claim 4
Dependent Claim
60 words
The carton as set forth in claim 1 in which the sleeve member is comprised of a one-piece blank and includes top, bottom, and side walls, an extension of the bottom wall comprising a glue flap adhered to the outer surface of one of the side walls, and an inward panel extension of said side wall constitutes said yieldable element.
Claim 5
Dependent Claim
32 words
The carton as set forth in claim 3 in which an extension of said yieldable element is folded downwardly, return-bent, and adhered to a portion of said bottom wall of the sleeve.
Claim 6
Dependent Claim
21 words
The carton as set forth in claim 4 in which the material of which the two members are formed is cardboard.
Claim 7
Dependent Claim
87 words
A one-piece blank for the production of a sleeve member for a carton of the type described, which comprises in sequence the following panels connected by fold lines: a narrow glue flap, a bottom wall panel, a side wall panel, a top wall panel, a second side wall panel of a width substantially equal to that of said first named side wall panel, a resilient spring-lock panel, and a second glue flap for the securing of said spring lock panel to a portion of said bottom panel.
Claim 8
Dependent Claim
87 words
A one-piece blank for the production of a sleeve member for a carton of the type described, which comprises in sequence the following panels connected by fold lines: a narrow glue flap, a bottom wall panel, a side wall panel, a top wall panel, a second side wall panel of a width substantially equal to that of said first named side wall panel, a resilient spring-lock panel, and a second glue flap for the securing of said spring lock panel to a portion of said bottom panel.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |