Rectangular carton having sift-proof and squaring closure专利检索-防伪纸安全文件银行与财务事项专利检索查询-专利查询网

Rectangular carton having sift-proof and squaring closure

阅读：959发布：2022-12-13

专利汇可以提供Rectangular carton having sift-proof and squaring closure专利检索，专利查询，专利分析的服务。并且The invention provides an improved carton for powdered materials and the like, of rectangular or square shape, which has a top or bottom closure of inwardly foldable flaps, and preferably both, wherein the inwardly foldable flap on the rear wall of the carton is provided with two cutout portions each having a side edge which is engaged by a tongue provided on the sidewall flap so as to maintain the carton in squared condition; and at the same time such cutouts each have an oblique angled portion which permits one of said tongues to be interlocked therewith, so that the extension members on the rear wall and sidewalls may be readily glued or sealed to the flap on the front wall of the carton to provide a squared and sealed carton ready for shipping, stacking and display purposes.，下面是Rectangular carton having sift-proof and squaring closure专利的具体信息内容。

权利要求

1. A carton comprising: a. front, Rear and sidewalls joined together to provide a hollow rectangular tube; b. flap extensions on the lower end of each of said front, rear and sidewalls adapted to be overlapped to provide a bottom closure; c. flap extensions on the upper end of each of said front, rear and sidewalls adapted to be folded inwardly to provide a top closure; d. the upper flap extension on the rear wall having two cutout portions each having an edge remote from the adjacent edge of such flap and parallel thereto; e. said sidewall flaps each having a tongue for engagement in said cutout portions and having an edge parallel to the side flap fold; and f. said cutout portions also having an oblique edge for overlapping and interlocking engagement with said tongues, whereby said rear wall flap and said sidewall flaps are maintained in interlocking engagement, and the carton is squared by engagement of the edges of the tongues parallel to the side flap folds with the edges of the cutout portions parallel to and remote from the side edges or the rear flap.

2. A carton according to claim 1, wherein the upper flap extension on the rear wall is coated with a sealant around such cutout portions, and the inner face of said front flap extension is also coated with a sealant.

3. A carton according to claim 1, wherein the flap extensions on the lower end of the rear wall also have two cutout portions each having an edge remote from the adjacent edge of such flap and parallel thereto, said side flaps at the lower end of each sidewall each having a tongue for engagement in said cutout portions and having an edge parallel to the side flap fold, each of said cutout portions also having an oblique edge for overlapping and interlocking engagement with said tongues.

4. A carton according to claim 1, wherein the sidewall flaps have been cut away adjacent the edge of the rear wall flap and have also been cut horizontally parallel to the side flap fold.

5. A carton according to claim 1, wherein the cutout portions in the upper flap extension on the rear wall have slits connected thereto.

6. A carton according to claim 1, wherein the upper flap extension of the rear wall is coated with a sealant around such cutout portions, the inner face of such front flap extension is also coated with a sealant, and the said front flap extension is sealed to the overlapped and interlocked sidewall and rear wall flap extensions.

7. A carton blank comprising: a. front, rear and sidewalls joined together along fold lines and adapted to be folded into a hollow rectangular tube; b. flap extensions on the lower end of each of said front, rear and sidewalls adapted to be folded inwardly to provide a bottom closure; c. flap extensions on the upper end of each of said front, rear and sidewalls adapted to be folded inwardly to provide a top closure; d. the upper flap extension on the rear wall having two cutout portions each having an edge remote from the adjacent edge of such flap and parallel thereto; e. said sidewall flaps each having a tongue for engagement in said cutout portions and each said tongue having an edge parallel to the side flap fold; and f. said cutout portions also having an oblique edge adapted for interlocking and overlapping engagement with said tongues.

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Rectangular carton having sift-proof and squaring closure

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