After going to my local silkscreening supply store, Cosmex Graphics, i found out that hinge clamps were going to be fairly expensive. They were going to charge me $45 for a pair of those things !!!!!
after looking around in hardware stores, my only option was speedball's hinges. .. until I emailed my teacher and got a response. This is what he showed me:
this could be very useful for noobs or people on a budget. I will be fixing up all my new equipment this weekend and i'll report back to see how well it works.