US 5,364,333 AGranted

Tamper evident consumer product package, windowed flat blank used therein, and method and apparatus for making the same

AssigneeGulf States Paper Corporation

InventorsRichard F. Gulliver, Michael C. Linder

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Abstract

A package comprising a consumable product and a sealed container containing the consumable product. The container is made up of a folded and sealed sheet of carton material having an opening therein defining a product-viewing window and a sheet of clear film material disposed over the opening so as to close the opening while retaining the product-viewing capability of the window. The clear film sheet has a marginal periphery disposed in lapped relation to a marginal periphery of the carton sheet and a wave energy curable adhesive between the marginal periphery of the clear film sheet and the marginal periphery of the carton sheet in a cured by wave energy condition bonding the clear film sheet over the carton sheet opening so that the bond cannot be rebonded by the cured adhesive once the bond provided by the cured adhesive between the sheets has been broken. The container is erected from a flat blank consisting of the carton sheet, the film sheet and the cured adhesive. A method and apparatus is disclosed for making the flat blank.

Claims8

Dependent claims

Apparatus for forming carton blanks each comprising a sheet of carton material having an opening therein and a sheet of clear film having a central portion sufficient to extend over said opening and a marginal peripheral portion sufficient to extend over a marginal peripheral portion of said carton sheet defining said opening, said apparatus comprising

means for moving successive carton sheets (1) into and out of an adhesive-applying station (2) into and out of an assembly station and (3) into and out of an ultraviolet wave energy applying station,
means for applying an amount of ultraviolet wave energy curable adhesive to one surface of the marginal peripheral portion of each successive carton sheet while in said adhesive-applying station,
means for cutting successive clear film sheets from a roll supply of clear film material and for mounting each successive clear film sheet on a mating carton sheet while in said assembly station for movement by said moving means with the mating carton sheet in an assembled relation therewith wherein the central portion of the clear film sheet extends over the opening and the marginal peripheral portion of said clear film sheet is disposed in lapped relation with the marginal peripheral portion of the mating carton sheet and one surface of the marginal peripheral portion of the clear film is engaged with the adhesive on the one surface of the marginal peripheral portion of the mating carton sheet, and
means, constructed and arranged with respect to said moving means, for subjecting each successive clear film sheet, while in assembled relation with a mating carton sheet add moving through said ultraviolet wave energy applying station, with sufficient ultraviolet wave energy to cure the ultraviolet wave energy curable adhesive, thereby bonding each successive clear film sheet to a mating carton sheet so that the bond cannot be rebonded by the cured adhesive once the bond provided by the cured adhesive between the sheets has been broken.

1 more element

a conveyor mechanism constructed and arranged to move successive carton sheets (1) into and out of an adhesive-applying station (2) into and out of an assembly station and (3) into and out of an ultraviolet wave energy applying station,
an adhesive applicator assembly constructed and arranged to apply an amount of ultraviolet wave energy curable adhesive to one surface of the marginal peripheral portion of each successive carton sheet while in said adhesive-applying station,
cutting structure constructed and arranged to cut successive clear film sheets from a roll supply of clear film material and to mount each successive clear film sheet on a mating carton sheet while in said assembly station for movement by said conveyor mechanism with the mating carton sheet in an assembled relation therewith wherein the central portion of the clear film sheet extends over the opening and the marginal peripheral portion of said clear film sheet is disposed in lapped relation with the marginal peripheral portion of the mating carton sheet and one surface of the marginal peripheral portion of the clear film is engaged with the adhesive on the one surface of the marginal peripheral portion of the mating carton sheet, and
an ultraviolet wave energy applying assembly constructed and arranged with respect to said conveyor mechanism so as to subject each successive clear film sheet, while in assembled relation with a mating carton sheet and moving through said ultraviolet wave energy applying station, with sufficient ultraviolet wave energy to cure the ultraviolet wave energy curable adhesive, thereby bonding each successive clear film sheet to a mating carton sheet so that the bond cannot be re-bonded by the cured adhesive once the bond provided by the cured adhesive between the sheets has been broken.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/091,887Filed 15 Jul 1993 · continuation
Priority: 19 Jul 1990
Granted: 15 Nov 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B65D 5/4204
Details of containers or of foldable or erectable container blanks: inspection openings or windows
B31B 50/82
Forming or attaching accessories, e.g. opening devices, closures or tear strings: forming or attaching windows
B65D 5/302
The tongue being a part of a lateral extension of a side wall: combined with a slot provided in an adjacent side wall
B65D 5/6667
Combined with flaps or tabs provided at the side edges of the lid: and connected to one another in order to form an uninterrupted telescoping flange