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US3708108A Expired / Lapsed US ⏱️ 0.0 years remaining

Flip top carton

Assignee: F.N. Burt Co Inc
•
Filing: 1971-09-22
•
Granted: 1973-01-02
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Expires: 1991-09-22
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Abstract

Abstract The flip-top carton is double-walled throughout its four sides and made from a one-piece blank having eight wall panels and a terminal glue flap. The first four walls and the adjacent glue flap form an inner box structure and the other four panels provide a wrap-around outer box structure. All of the eight panels being of approximately the same height, making a slight allowance for proper fitting of the inner structure within the outer one. The outer front panel and the outer side panels are provided with transverse tear lines spaced from the upper edges and both the inner and outer back panels provided with coinciding weakened hinge lines, whereby the hinged flip-top structure is formed. The tear lines of the side panels are arcuate in configuration. The glue flap is of only a narrow width as compared with the inner back panel to which it is secured. The upper portions of the front panel of the inner box structure are provided with protruding locking tabs which frictionally interlock with Deboss scores formed on the inner surfaces of the sidewalls of the flip-top structure. The surface of the inner front panel is provided with a series of transverse Deboss scorings for structural reinforcement. The fold lines between the panels of the inner box structure are slit-perforated while the fold lines of the outer box structure are merely creased or scored.

Inventors

  • 👤 C Rosenburg

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 17:31
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/54; B65D5/5405; B65D5/542; B65D5/02; B65D5/0281; B65D5/5425; B65D5/543; B65D85/00; B65D85/07; B65D85/08; B65D85/10; B65D85/1036; B65D85/1045; B65D85/1056; B65D85/10564

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 150 words
A flip-top carton consisting of a one-piece blank and comprising an inner box structure consisting of front, back, and intervening sidewall panels connected along fold lines, and a narrow glue flap connected by a fold line to one of said sidewall panels and glued to only the narrow marginal area of the inner surface of said back panel; an outer box structure comprising a sidewall panel converted by a fold line to the edge of the inner back panel adjacent the glued area, and continuing with fold connected front, side, and back panels in that order; the last named outer back panel leaving its inner surface glued to the outer surface of the inner back panel; the two overlying back panels having coinciding transverse score lines forming a hinge for the flip-top, and rupturable transverse aligned tear lines across the outer front and side panels to complete the flip-top structure.
Claim 2
Dependent Claim 150 words
A flip-top carton consisting of a one-piece blank and comprising an inner box structure consisting of front, back, and intervening sidewall panels connected along fold lines, and a narrow glue flap connected by a fold line to one of said sidewall panels and glued to only the narrow marginal area of the inner surface of said back panel; an outer box structure comprising a sidewall panel converted by a fold line to the edge of the inner back panel adjacent the glued area, and continuing with fold connected front, side, and back panels in that order; the last named outer back panel leaving its inner surface glued to the outer surface of the inner back panel; the two overlying back panels having coinciding transverse score lines forming a hinge for the flip-top, and rupturable transverse aligned tear lines across the outer front and side panels to complete the flip-top structure.
Claim 3
Dependent Claim 41 words
The carton as set forth in claim 1 in which the tear lines across the outer side panels are arcuate in configuration to facilitate opening and closing of the flip-top with relation to the upwardly projecting inner box structure without snagging.
Claim 4
Dependent Claim 74 words
The carton as set forth in claim 1 in which the portion of the inner front panel which protrudes upwardly after the severance of the front flip-top structure from the outer front panel being provided with laterally protruding locking ears, and short slightly protruding embossed score lines on the inner surfaces of the side panel portions of the flip-top structure for interlocking engagement with said ears to retain the flip-top in releaseable closed position.
Claim 5
Dependent Claim 29 words
The carton as set forth in claim 1 in which the inner front panel is provided with a series of vertically spaced laterally extending reinforcing slightly embossed score lines.
Claim 6
Dependent Claim 35 words
The carton as set forth in claim 1 in which the connecting fold lines between the panels of the inner box structure are slit-perforated while those of the outer box structure are merely score lines.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-01-02 1976-07-03 1977-01-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-01-02 1980-07-03 1981-01-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-01-02 1984-07-03 1985-01-02 $7700.00 Window Closed / Lapsed

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