Flare angle
Outward wall slope from vertical; the base is shorter and narrower than the opening by 2 × height × tan(angle) and remains at least 30 mm wide.
Food and hospitality / JETDIELINE
The popcorn box is open at the top and has four outward-sloping walls, a side seam and a glued bottom. Length and width describe the upper opening; the base is smaller.


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03 / BOX
Simplified display model without material thickness, not to scale.
The 3D view is not available in this browser. The image shows the folded shape.
carton.popcornFour trapezoidal walls form a truncated pyramid. They form a fan in the blank. The side seam and three bottom tabs are glued. Vertical height and the shared flare angle determine the smaller base area and sloping wall edges.
Pre-break the blank along all creases and glue the side seam to the inside of the back wall. Apply adhesive to the bottom tabs, swing the base into position and press the tabs against the inside of the front and sides. The carton then stands open and can be nested.
Grain direction parallel to height: wall creases fold neatly and the tall walls remain stiff (check with the test printer).
Test fit, folding and closure on a sample made from the intended material. Confirm material thickness, grain direction and production steps with your printer.
Compare openings and closures for your food product. Check direct-contact material, moisture and grease resistance with the manufacturer.
Inside dimension
These dimensions describe the preview, not a fixed packaging size. The app recalculates the dieline for your own dimensions.
Outward wall slope from vertical; the base is shorter and narrower than the opening by 2 × height × tan(angle) and remains at least 30 mm wide.
Width of the glue flap used to glue the blank into a tube. The material requires a minimum width.
Angle at the ends of the glue flap; makes folding and erection easier.
No. In the starting example, these values describe the upper inside opening. The outward-sloping walls make the base smaller. Height and flare angle determine the difference in both directions. If a particular footprint is needed, check the calculated base and erected sample; opening dimensions alone are insufficient.
The base must retain at least 30 mm inside dimension on both sides. A tall carton with a small opening may fall below this limit even at an angle within the parameter range. popcornFlare.bottomMinimum checks this relationship. Reduce the slope or change the opening; individual values are not independently valid.
The construction uses a glued bottom with three bottom tabs. After gluing the side seam, swing the base into position and press the tabs against the inside of the front and sides. There is no selectable tuck bottom. Check adhesive application, assembly sequence and bottom hold in actual board because the calculation model does not assess the real glue bond.
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