What components are involved in this kind of scroll?
These types of scrolls do exist.

One example is called an "Esther" scroll case.

Here are some examples.

http://www.museumsinisrael.gov.il/en/items/Pages/ItemCard.aspx?IdItem=ICMS_IMJ_366069

http://www.magnes.org/collections/museum/jewish-life/synagogue-and-communal-life/esther-scroll-collection

http://www.imj.org.il/imagine/galleries/viewWallE.asp?case=34&amp;srm=Purim&amp;swl=The%20Esther%20Scroll

And ... if I were to try to make something similar I would break it down to the following parts.