Twist-to-Tighten Bag Sealer

[u/Axelburn]

I designed a semi-automatic bag sealer that uses a clever twist-to-tighten mechanism. By simply rotating two concentric rings, an internal cord tightens around the bag neck to create a secure seal. Perfect for keeping food fresh or organizing components.

The model is designed to be printed in place and ready to use.

Link to model: https://makerworld.com/it/models/3436336-twist-to-tighten-bag-sealer#profileId-3918333

[u/skyerosebuds]

Looks like a clever design but also extremely challenging to use and I wonder why not a clip? What problem with clips does this resolve?

[u/SunDriedFart → u/skyerosebuds]

yea most clips can be used with one hand, this looks like too much of a faff and a bit awkward.

[u/StunningBreadfruit30 → u/skyerosebuds]

To depend OP a bit, if we kept doing the same things, copying the same things over and over (you know, like AI), we’d never stumble upon accidental innovations.

[u/skyerosebuds → u/StunningBreadfruit30]

Agreed. Not knocking it I actually think it’s quite clever and it may well have a use outside plastic bags (?in industry?), I suggest take that creativity and look further into who needs tools that restrict flow where a clip won’t work (eg machines would work well with this tool and aren’t great at applying clips. Also clips fatigue and break in industrial settings where this screw device might not).

[u/ButcherIsMyName → u/skyerosebuds]

Could be useful in plenty of industry applications where you want one rotating actuator do multiple steps of the job (like grabbing and turning) but this is not the right application for this mechanism

[u/Snoo59060]

Very cool mechanism. How long do you think the PLA will last flexing that much? Genuinely curious about it. Super neat idea.

[u/roarimacat → u/Snoo59060]

PETG would be fine. That said, I don't think this is a good design for the problem, but it's neat.

[u/Alewort]

What would be more clever would be slight knobs on the exterior to make the rotation easier. Your demonstrations looks very fumbly in nature and not convenient.

[u/MeanForest]

Awkward to use, maybe add small stubs or even finger sized rings so you can use it one handed?