3 ms·
How do they join the bottoms of the bottles? They seem to be prejoined in the dome timelapse.
by emj 10y ago
How do they join the bottoms of the bottles? They seem to be prejoined in the dome timelapse.
- unwind 10y agoGood question! Had to look it up in the paper, and it turns out they use wood screws. Either regular ones using a long screwdriver through one of the bottle's mouths, or more specialized double-ended screws (with two points) that let you grab the bottles and counter-rotate them to drive in the screw in both bottoms. Neat, I hadn't thought the bottoms of PET bottles had enough material to make this work, I would have expected bolts with nuts, i.e. more metal-to-metal in the fasteners.
- gjkood 10y agoWoodscrews. See the image on page 7, column 1.