By 16aaygh. Futon. At Friday, August 10th 2018, 04:22:53 AM.
The first futons were referred to as tri-fold. Tri-fold means that three sections make up the frame of the futon and as such the futon operates using these three sections to create the sleep surface and seating. Early models required locking pins but more modern designs were developed that did away with this by incorporating an improved design that folded up under itself. The only thing not going for these frames is that they would sit very low to the ground making them a great choice only for those who get in and out of them easily. Today you'll find these frames offered in more specialty futon stores as they are typically made from pine and are left unfinished. Tri-fold futons are still sold today and usually offered at much lower price points.
Next, bi-fold futons would make it onto the scene in the early 1980's. These frames while not as simple and inexpensive as the tri-fold designs allowed for greater creativity and design and looked more like conventional furniture. Bi-fold futon frames as their name suggests are made with two sections a seat and back rack. The design of these futon frames allowed for easier conversion from a sofa to a bed and back again and offered seating at the same height as most other furniture making them perfect for anyone. Arms at each end of the futon would be made in various designs and styles allowing for easy integration into almost any room. Bi-Fold futon frames are made in sofa, loveseat and chair sizes and are often available with matching tables and ottomans.
They are not for everyone though. Serving many functions, futons may not offer the level of comfort or look some people desire. First time buyers should carefully consider what is most important for them before making any purchases.