This is my take on a photography background sweep stand. I designed this to have each end be a single piece with a built in clip to hold the paper, a base that weights can be placed on, and a gap at the top where a rod or stick can be placed to help support and stabilize the background. It works great using 12" x 12" sheets of scrapbooking paper for the background.
This was developed using PLA and prints without supports or rafts (though bed adhesion can be an issue).
The clip is designed with a very small gap so it will be tight enough to hold a sheet of paper. When printed this gap is often closed up and needs to be broken apart. It should be able to be broken apart just by pushing down on the clip's "lever", though an adjustable plier can be used as shown in the photo and carefully rocked to twist the clip apart.