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US3918629A Expired / Lapsed US ⏱️ 0.0 years remaining

Tubular carton

Assignee: Westvaco Corp
•
Filing: 1974-01-13
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Granted: 1975-11-11
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Expires: 1994-01-13
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Abstract

Abstract A tubular carton is disclosed which has particular utility as a support means for an egg-shaped product containing shell. The carton is prepared from a single blank of folded and glued paperboard and includes at the top thereof an integral locking means for retaining the shell in the carton and at the bottom an opening feature for removing the shell from the carton.

Inventors

  • 👤 Jr Hampton E Forbes
  • 👤 Lawrence J Lafreniere

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 05:04
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/22; B65D3/02; B65D3/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 168 words
A one piece blank of substantially rectangular shape for forming a tubular carton, comprising: a. a bottom wall panel of circular configuration located centrally of said blank; b. a pair of side wall panels attached to two opposed sides of said bottom wall panel along perforated score lines; c. a plurality of finger-like bottom closing flaps located between said side wall panels along the remaining opposed sides of said bottom wall panel and attached thereto along perforated lines; d. a pair of tapered flaps foldably attached to said side wall panels along the edges thereof that are opposed from the attachment between saiD side wall panels and said circular bottom wall; e. an access means in one of said side walls formed by a curved perforated line located adjacent the perforated line connecting said side wall to said bottom wall; and, f. a plurality of longitudinal locking slots formed in each tapered flap and located adjacent the fold lines connecting the tapered flaps to the side wall panels.
Claim 2
Dependent Claim 168 words
A one piece blank of substantially rectangular shape for forming a tubular carton, comprising: a. a bottom wall panel of circular configuration located centrally of said blank; b. a pair of side wall panels attached to two opposed sides of said bottom wall panel along perforated score lines; c. a plurality of finger-like bottom closing flaps located between said side wall panels along the remaining opposed sides of said bottom wall panel and attached thereto along perforated lines; d. a pair of tapered flaps foldably attached to said side wall panels along the edges thereof that are opposed from the attachment between saiD side wall panels and said circular bottom wall; e. an access means in one of said side walls formed by a curved perforated line located adjacent the perforated line connecting said side wall to said bottom wall; and, f. a plurality of longitudinal locking slots formed in each tapered flap and located adjacent the fold lines connecting the tapered flaps to the side wall panels.
Claim 3
Dependent Claim 169 words
A one piece blank of substantially rectangular shape for forming a tubular carton, comprising: a. an elongated carton side wall panel having an extension at one side thereof for forming a glue lap; b. a bottom wall panel of circular configuration located along the lower edge of said side wall panel and connected thereto along a perforated score line; c. a plurality of finger-like bottom closing flaps located along the lower edge of said side wall panel asymmetrically of said bottom wall panel and connected to said lower edge along a perforated score line; d. at least one tapered flap attached along the upper edge of said side wall panel along a score line; e. an access means in said side wall formed by a curved perforated line located adjacent the perforated line connecting said side wall to said bottom wall; and, f. a plurality of longitudinal locking slots formed in the tapered flap and located adjacent the fold line connecting the tapered flap to the side wall panel.
Claim 4
Dependent Claim 169 words
A one piece blank of substantially rectangular shape for forming a tubular carton, comprising: a. an elongated carton side wall panel having an extension at one side thereof for forming a glue lap; b. a bottom wall panel of circular configuration located along the lower edge of said side wall panel and connected thereto along a perforated score line; c. a plurality of finger-like bottom closing flaps located along the lower edge of said side wall panel asymmetrically of said bottom wall panel and connected to said lower edge along a perforated score line; d. at least one tapered flap attached along the upper edge of said side wall panel along a score line; e. an access means in said side wall formed by a curved perforated line located adjacent the perforated line connecting said side wall to said bottom wall; and, f. a plurality of longitudinal locking slots formed in the tapered flap and located adjacent the fold line connecting the tapered flap to the side wall panel.
Claim 5
Dependent Claim 174 words
In combination, a tubular carton formed from a unitary blank of paperboard or the like and a product retaining shell, a portion of which is of cylindrical cross section, said tubular carton having a closed bottom end and an open top end for supporting said product retaining shell, said tubular carton and said product retaining shell each including cooperating locking means, said tubular carton comprising: a. a flat circular bottom wall; b. a cylindrical side wall formed from at least one side wall panel and attached to said bottom wall along at least one edge thereof by a perforated line; c. a plurality of finger-like bottom wall closure flaps connected between said bottom wall and said cylindrical side wall at the bottom of said tubular carton; d. at least one tapered flap foldably connected to said cylindrical side wall and secured to the inside of said cylindrical side wall at the top of said tubular carton; and, e. an access means in said cylindrical side wall adjacent the closed bottom of said tubular carton.
Claim 6
Dependent Claim 174 words
In combination, a tubular carton formed from a unitary blank of paperboard or the like and a product retaining shell, a portion of which is of cylindrical cross section, said tubular carton having a closed bottom end and an open top end for supporting said product retaining shell, said tubular carton and said product retaining shell each including cooperating locking means, said tubular carton comprising: a. a flat circular bottom wall; b. a cylindrical side wall formed from at least one side wall panel and attached to said bottom wall along at least one edge thereof by a perforated line; c. a plurality of finger-like bottom wall closure flaps connected between said bottom wall and said cylindrical side wall at the bottom of said tubular carton; d. at least one tapered flap foldably connected to said cylindrical side wall and secured to the inside of said cylindrical side wall at the top of said tubular carton; and, e. an access means in said cylindrical side wall adjacent the closed bottom of said tubular carton.
Claim 7
Dependent Claim 48 words
The combination of claim 3 wherein the cooperating locking means of said product retaining shell consists of a plurality of embossed protrusions on said product retaining shell that are spaced from one another and located in the region of the cylindrical cross section of said product retaining shell.
Claim 8
Dependent Claim 48 words
The combination of claim 4 wherein the cooperating locking means of said tubular carton consists of a plurality of elongated slots equally spaced from one another and located in the tapered flap secured to the inside of said cylindrical side wall at the top of said tubular carton.
Claim 9
Dependent Claim 85 words
The combination of claim 5 wherein the flat circular bottom wall of said tubular carton is located centrally of the unitary blank of paperboard or the like from which the tubular carton is prepared, the cylindrical side wall consists of a pair of side wall panels attached to two opposed sides of said bottom wall and the finger-like bottom wall closure flaps are located between said side wall panels along the remaining opposed sides of said bottom wall and are attached thereto along perforated lines.
Claim 10
Dependent Claim 52 words
The combination of claim 5 wherein both the flat circular bottom wall and the plurality of finger-like bottom wall closure flaps are located along a lower edge of said cylindrical side wall and connected thereto along perforated lines, with the finger-like bottom wall closure flaps being positioned asymmetrically of said bottom wall.

References Cited (Backward Citations)

US880952A Cited
US1216391A Cited
US2019787A Cited
US2749018A Cited
US2741416A Cited
US3411692A Cited
US3381877A Cited
US3633814A Cited
US3741379A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-11-10 1979-05-12 1979-11-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-11-10 1983-05-12 1983-11-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-11-10 1987-05-12 1987-11-11 $7700.00 Window Closed / Lapsed

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