Bottom curl allowance
Sidewall extension below the cup bottom, curled around the bottom disc's skirt; measured along the slant height.
Food and hospitality / JETDIELINE
Calculate the conical sidewall blank of a paperboard cup from rim diameter, bottom diameter, and finished height. The annular sector includes the glue seam and separate allowances for the bottom curl and top rolled rim.

cone.cup.wrapThe sidewall is an annular sector with a constant-width glue seam. Bottom and rim lines are annotation lines. Curl allowances extend the blank along the slant height; they do not change the entered finished cup height.
Place the sidewall around a conical mandrel and glue the seam. Insert the bottom disc, curl the bottom allowance around its skirt, and compress; roll the rim outward.
Grain direction pending: Along the circumference, the rim and bottom roll more easily; along the generatrix, the wall is stiffer (check with the cup manufacturer).
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.
Outside dimension
These dimensions describe the preview, not a fixed packaging size. The app recalculates the dieline for your own dimensions.
Sidewall extension below the cup bottom, curled around the bottom disc's skirt; measured along the slant height.
Sidewall extension above the cup rim, rolled into the rim; measured along the slant height.
For this sidewall, the diameters are outside dimensions of the finished cup at the rim and bottom. Height runs from bottom to rim. Curl allowances are added only in the blank. Do not use flat contour diameters as cup dimensions; measure or define the finished shape.
No. This ID describes the sidewall with bottom curl allowance. For assembly, insert a separate bottom disc with a suitable skirt and curl the sidewall around it. The disc is not part of the shown export. Agree on its fit and connection to the sidewall with the cup manufacturer using a sample.
They mark the bottom and rim of the finished cup before curling. The contour extends beyond them at the top and bottom by the respective allowances. The markings are annotation lines, not creases. When handing off the production file, the manufacturer must know their meaning and decide whether they are needed in its process.
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