EP0169563A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Easy-to-open carton for confectionery or other food products
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1985-07-25
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Granted: —
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Expires: 2005-07-25
Abstract
Abstract A carton is formed by rolling a sectorial piece (B) of sheet material (50, 50a, 50b), preferably a lamination of paper (52) and a plastic (54) that is impervious to fluid, into the shape of a flattened cone. The lapping side edges (26, 28) and apex end (22) of the cone are both sealed, whereas its base end (24) is to be closed and sealed after filling a desired food product (F) into the carton therethrough. The overlapping edge (26) of the sealed side seam has a tab (30) protruding therefrom, which tab is to be pulled for opening the carton by tearing same along a loop of tear-off strip (32, 32a) around the cone. The cone is flattened along a pair of opposite indented lines (38) preformed in the sheet material so as to extend between the apex end and base end of the cone. Each indented line is bifurcated at a midportion thereof into a pair of spaced apart branch lines (40, 40b) to impart thickness to the carton.
Inventors
- 👤 Yoshihiko Mizoguchi
- 👤 Keiichi Sekine
- 👤 Yasutoyo Komiya
- 👤 Yoshio Nishida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 01:16
CPC Classifications
B; B32; B32B; B32B1/00; B65; B65D; B65D85/00; B65D85/60; B32B27/00; B32B27/06; B32B27/10; B32B3/00; B32B3/02; B65D3/00; B65D3/02; B65D3/06; B65D3/26; B65D3/261; B65D3/262; B65D75/00; B65D75/26; B65D75/52; B65D75/58; B65D75/5827; B65D75/5833; B65D75/5844; B32B2307/00; B32B2307/30; B32B2307/31; Y; Y10; Y10S; Y10S229/00; Y10S229/924; Y10S229/926
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
195 words
An easy-to-open carton particularly well suited for packaging confectionery or like food products, characterized in that the carton is approximately in the shape of a flattened cone formed by rolling a substantially sectorial piece (B) of sheet material (50, 50a, 50b), having a lapping side seam (42) and an apex end (22), which are both sealed, and a base end (24) which is to be sealed after filling a desired product (F) into the carton therethrough, that the sheet material is adapted to provide around the cone a loop of tear-off strip (32, 32a) which is to be removed by tearing for opening the carton, that an overlapping edge (26) of the side seam of the cone has a tab (30) protruding therefrom as an extension of the tear-off strip for use in removing the same, that the cone is flattened along a pair of opposite indented lines (38) preformed in the sheet material so as to extend between the apex end and base end of the cone, and that each indented line is bifurcated at a midportion thereof into a pair of spaced apart branch lines (40, 40b) to impart thickness to the carton.
Claim 2
Dependent Claim
195 words
An easy-to-open carton particularly well suited for packaging confectionery or like food products, characterized in that the carton is approximately in the shape of a flattened cone formed by rolling a substantially sectorial piece (B) of sheet material (50, 50a, 50b), having a lapping side seam (42) and an apex end (22), which are both sealed, and a base end (24) which is to be sealed after filling a desired product (F) into the carton therethrough, that the sheet material is adapted to provide around the cone a loop of tear-off strip (32, 32a) which is to be removed by tearing for opening the carton, that an overlapping edge (26) of the side seam of the cone has a tab (30) protruding therefrom as an extension of the tear-off strip for use in removing the same, that the cone is flattened along a pair of opposite indented lines (38) preformed in the sheet material so as to extend between the apex end and base end of the cone, and that each indented line is bifurcated at a midportion thereof into a pair of spaced apart branch lines (40, 40b) to impart thickness to the carton.
Claim 3
Dependent Claim
56 words
A carton as claimed in claim 1, characterized in that the loop of tear-off strip (32, 32a) is located intermediate the apex end (22) and base end (24) of the carton, so that the carton separates into a part including the base end and another part including the base end upon removal of the tear-off strip.
Claim 4
Dependent Claim
46 words
A carton as claimed in claim 1, characterized in that the sheet material (50) is a lamination of at least paper (52) and a film or foil (54) of a substance that is impervious to fluids, with the paper forming an outer ply of the carton.
Claim 5
Dependent Claim
37 words
A carton as claimed in claim 3, characterized in that the tear-off strip (32, 32a) is bounded by a pair of parallel spaced incicisions (34) formed in the paper (52) of the sheet material (50, 50a, 50b).
Claim 6
Dependent Claim
33 words
A carton as claimed in claim 4, characterized in that the incisions (34) are made in the outside surface of the paper (52) to a depth less than the thickness of the paper.
Claim 7
Dependent Claim
46 words
A carton as claimed in claim 3, characterized in that the tear-off strip (32) extends rectilinearly when the piece of sheet material (B) is unrolled, and wherein the substance is a plastic that is oriented in the same direction as that in which tear-off strip extends.
Claim 8
Dependent Claim
60 words
A carton as claimed in claim 6, characterized in that the sheet material (50a, 50b) further comprises a ply (58) of a heat-sealable substance overlying the ply (54) of the oriented plastic, whereby the lapping side seam (42), apex end (22), and base end (24) of the carton can be heat sealed with the ply (58) of the heat-sealable substance.
Claim 9
Dependent Claim
44 words
A carton as claimed in claim 7, characterized in that the sheet material (50b) further comprises a ply (60) of a substance impervious to gas which is interposed between the ply (54) of the oriented plastic and the ply (58) of the heat-sealable substance.
Claim 10
Dependent Claim
63 words
A carton as claimed in claim 1, characterized in that an underlapping edge (28) of the side seam (42) has its outer side pared to provide a skive (64) of a constant thickness and a constant width extending along the underlapping edge, the skive being doubled outwardly to provide a fold (66) approximately flush with an unskived part (68) of the sheet material.
Claim 11
Dependent Claim
81 words
A carton as claimed in claim 9, characterized in that a layer of a release agent (76) is formed on that portion of the outer surface of the unskived part (68) of the underlapping edge (28) which immediately adjoins the fold (66) of the skive (64) and which underlies the tab (30) protruding from the overlapping edge (26) of the side seam (42), whereby the tab is prevented from sticking to the underlapping edge despite the sealing of the side seam.
Claim 12
Dependent Claim
38 words
A carton as claimed in claim 10, characterized in that the dimension (W2) of the release agent layer (76) in a direction at right angles with the tab (30) is greater than the width (Wl) of the tab.
Claim 13
Dependent Claim
30 words
A carton as claimed in claim 9, characterized in that the total thickness (Tl) of the folded skive (64, 66) is greater than the thickness (T2) of the sheet material.
Claim 14
Dependent Claim
46 words
A carton as claimed in claim 9, characterized in that the fold (66) of the skive (64) has a pair of spaced' apart notches (78) formed in its edge (Z2) to facilitate the tearing of the fold upon exertion of a pull on the tab (30).
Claim 15
Dependent Claim
42 words
A carton as claimed in claim 13, characterized in that the spacing (D1) between the pair of notches (78) in the edge (72) of the fold (66) of the skive (64) is less than the width (D2) of the tear-off strip (32).
Claim 16
Dependent Claim
34 words
A carton as claimed in claim 1, characterized in that the overlapping edge (26) of the side seam (42) has formed therein a pair of notches (36) on both sides of the tab (30).
Claim 17
Dependent Claim
73 words
A carton as claimed in claim 1, characterized in that the bifurcations (40) of the pair of indented lines (38) are adapted to make the angles (91) between the pair of opposite sides of an apex end portion (46) of the carton and the axis (X-X) of the carton smaller than the angles (92) between the pair of opposite sides of the other portion of the carton and the axis of the carton.
Claim 18
Dependent Claim
39 words
A carton as claimed in claim 16, characterized by including an additional indented line (48) extending transversely between each pair of branch lines (40) at the boundary between the apex end portion (46) and other portion of the cone.
Claim 19
Dependent Claim
25 words
A carton as claimed in claim 1, characterized in that each pair of branch lines (40) are in a parallel spaced relation to each other.
Claim 20
Dependent Claim
22 words
A carton as claimed in claim 1, characterized in that each pair of branch lines (40b) are convexed away from each other.
References Cited (Backward Citations)
No citation records indexed.
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