Exact Parent-Roll Web Formulas Before Engraving Print Cylinders
Multi-lane stick machines slit one wide master roll into N individual ribbons inline via rotary shear knives. Ordering a master roll 4 mm off pitch shifts artwork off-center across outer lanes! Built under jelly machine sizing and selection and hot-fill jelly dosing and film specs, apply these formulas:
1. Single Stick Flat Strip Width (mm) = (2 × Finished Stick Width) + (2 × Back-Fin Seal Width, typically 6–7 mm). 2. Master Parent-Roll Width (mm) = N Lanes × Single Strip Width (+ optional 10–16 mm edge trim if specified).
Multi-Lane Jelly Stick Parent-Roll Width Lookup Table
Assuming a standard 6.5 mm back-fin seal (13 mm seal allowance per lane):
| Finished Stick Width | Single-Lane Strip | 4-Lane Roll Web | 6-Lane Roll Web | 8-Lane Roll Web | 10-Lane Roll Web |
|---|---|---|---|---|---|
| 18 mm Slim Collagen Stick | 49 mm / lane | 196 mm web | 294 mm web | 392 mm web | 490 mm web |
| 22 mm Standard Konjac Stick | 57 mm / lane | 228 mm web | 342 mm web | 456 mm web | 570 mm web |
| 25 mm Energy / Sports Gel | 63 mm / lane | 252 mm web | 378 mm web | 504 mm web | 630 mm web |
| 30 mm Wide Fruit Jelly Strip | 73 mm / lane | 292 mm web | 438 mm web | 584 mm web | 730 mm web |
| 42 mm Tubular Ice-Pop Bar | 98 mm / lane | 392 mm web | 588 mm web | 784 mm web | — (850 mm max) |
Check matching machine frame widths (360, 560, 650, 750, 850 mm) in jelly stick and sachet machines.
Hot-Fill Jelly Engineering Notes
- Cup Lidding Roll Web Formula: For an
M-row linear jelly cup sealer: Lidding Web Width =(M × Cup Rim OD) + [(M − 1) × 12–15 mm bridge] + 30 mm side skeleton(so waste matrix rewinds without snapping!). - 3-Flavor Artwork Printed on One Master Roll!: Print Lane 1–2 Strawberry, Lane 3–4 Mango, and Lane 5–6 Grape side-by-side on a single 6-lane master roll—producing 3 flavors simultaneously with zero extra cylinder setups!
- Standard 76 mm Core & <=450 mm OD: Keep master laminate reel weight manageable (<35–45 kg) or specify pneumatic roll-lift assists on >650 mm wide frames.
Confirm Your Artwork Dieline Before Printing
Send your stick or cup dimensions via Project Brief for an official factory film drawing.
Explore related equipment in Jelly Packing Machines, Hot-Fill Dosing & Film Specs, or send your stick/cup dimensions via Project Brief.