Our UR5e vacuum proposal puts one cup right over the closing seam. Demo carton had a lovely flat lid, ours have tape joins and a bit of crown when packed. What sample would you put in front of the tooling supplier first?
The crowned one, packed as it actually leaves your line. Empty boxes make nearly everything look easier, which is handy if your business is moving empty boxes.
I'd send a spread, not nominate one villain. We once spent ages arguing about our roughest board and then the glossy printed lid gave us the trouble. Different snag entirely. Who sorts out the tooling if your carton supplier changes the finish? That's the bit I'd want in the conversation before buying.
I've pulled a crowned lid, a printed one and our ordinary brown carton. All packed. The seam position wanders more than I realised when I looked along the stack.
Supplier tried our cartons. The cup on the join leaked on two lids; the same cartons held away from it during their stationary check. They're proposing a different cup layout now.
Ask who checks the usable pickup area when carton dimensions change. The revised layout may solve this seam position but leave your changeover staff without a clear rule for the next carton.
Did they get as far as releasing the printed carton, David? Ours can hang on after the move, and everyone watches the pickup because that's where the excitement usually is.
Packing lead is joining it. We're keeping the seam-fouling layout off the quote; replacement layout still needs the transfer and release work. At least the first leak wasn't our imagination.