Car Window Hidden TPU Hook For Laminated Info Sheets For Sales, Events, etc. Fully Parametric.

Created for a friend who displays his car at classic car events. The TPU hook is sized for his window glass thickness of 4.65mm but it's not too critical. If yours is similar, then this model should do the trick. If you need a very different size then I've included my parametric F3D so you can adjust anything you like in Fusion360. 

I used 0.4mm nozzle, 0.2mm layers. Use a 2-line brim for adhesion as this is a single-line wall model, and then cut 1-2mm of the whole edge off with strong sharp scissors to remove the brim easily.  

After printing a few, I realised that as well as needing to trim off the brim and its associated thicker first layer, the ends of the clip can be slightly thicker too as a result of the 3D printing process, so I trimmed 1-2mm off each end too and ended up with a nice even thickness clip. So if you're modding the F3D, I suggest allowing a couple of mm extra width and end-lengths to compensate for trimming. It doesn't matter if your trimming isn't too neat or straight, the whole thing will be hidden anyway.

For the ultimate hidden mount, put just the hooks on the top of your part-open car window (longer clip arm on the inside), close the window so the hooks go up into the window slot in the door, and mark the clips where they emerge from the slot, inside as well as outside (outside may not need trimming if it already disappears). Open the window and retrieve the hooks. Trim off the outside mark so the outside of the clip can't be seen when the window is shut. Put double-sided sticky tape on the long section of each clip from your mark to the end of the clip (on the inside face of the clip), and trim off any excess tape with scissors but leave the backing on the tape. Put the hooks on the top of the window again and close the window. Use Blutack or similar to position the laminated info sheet inside the car so it looks nice from the outside viewpoint, making sure the clips are resting on the interior side of the laminate. Then lift the hook edges and remove the double-sided backing tape and attach to the laminate. Remove the Blutack and now you can open the window and lift off the finished assembly ready to pop it back on in an instant anytime you want to display it. As the hooks are TPU they won't damage the window or slot, and won't get damaged if they get a bit squashed in storage between events. You might still need to tape the bottom of the laminate if your windows lean outwards a lot at the bottom and you want the laminate to be fully against the glass rather than hanging vertically - you choose.