The roll top unit is found in P-140. This is the top to plan 139 the double pedestal desk. The full size drawing shows the construction of the tambour slat assembly clearly. There is an alternate full size profile of the end panels for those prefer the double curve tambour. The file units are designed for stacking as high as five drawers and can be used side by side, flush, with no gap or space between units.
Doors pivot, swing up and slide in above the top of the books.
They are designed to be stackable in the same manner as the 19th century originals. They can be stacked 5 or more high and can be used side by side, flush, with no gap or open space between, for an attractive library wall system. This is the Cutler roll top desk. Abner Cutler was the first American to patent the roll top desk. 14 pages includes details for jigs and fixtures for building the tambour.