Unfortunately it is not as simple as what you suggested. When you use this for contact printing the first layer (the paper in this case) will be held in place with the vacuum being exerted. The film placed on top of the paper has no vacuum and consequently will not be held in place.

Typically the vacuum frames that are used for contact printing have a bladder that is drawn up against a glass which is installed above the paper/film sandwich. This then compresses the two together to affect a good contact.

Hope that this helps. Good luck