Hello,
not sure if this is of interest to some of you who still uses the old sony readers with the plastic spine. But I like to describe my procedure.
My covers were literally falling apart, so I tried to make new ones. With the PRS 505 I used the original spine which I removed from the original cover. For my 650 the spine broke, so I printed the two parts with my 3d printer. I used:
-Cardboard 2mm (too thick) and 1mm (better)
-Sticky faux leather (or whatever you prefer)
-original 2 part spine or printed ones (left is the "lower" and right the "upper" part)
Attachment 196352
-cutter, scalpel, cutting mat
-my good old sewing machine from my grandmother
1. Cut the cardboard matching the old cover
Attachment 196350
2. Place the two cardboard parts on the sticky faux leather with a space in between (for the spine and the folds)
Attachment 196347
3. Place the lower part of the spine in the middle between the cardboards
Attachment 196351
4. Cover everything with a second sheet of sticky faux leather, you see the bulge of the spine in the middle better in one of the next pictures
Attachment 196349
5. Cut the overhangs
Attachment 196357
6. Now you have to cut holes in the sticky f. l. to free the holes in the lower spine. In the picture below I used a second spine to localize the holes
Attachment 196354
7. Holes
Attachment 196356
8. Attach the upper part of the spine to see if everything fits and the holes are big enough
Attachment 196353
9. Remove the upper part of the spine to sew the margins. I did that to prevent the fraying of the edges and because it looks good (in theory...)
Attachment 196355
10. Okay, some problems: my cardboard is a little bit small because I forgot the width of the spine itself, when I measured it, and the seam is not very good because the thread tension was too low, although I had tried the seam on the leftovers, but here it is:
Attachment 196346
I printed the spine with nylon. Time will tell if everything is stable enough.