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. Buckle folding unit Knife shafts in a buckle plate folding unit Q Folded sheet classification Q 3. Assembling/Gathering: Assembling is the production of a specific sequence of folded sheets, leaves, or webs into a loosely jointed block. Basic principles for assembling signatures and leaves (individual sheets) Q Structure of a gatherer for singlelayer blocks Q 4. Binding ? Types of binding Seam: Seamless: perfect binding無線裝訂 騎馬訂 saddle binding 三眼訂 Thread Stitching Q A. Saddle binding 成本低,速度快; 不牢固; 64頁的書、雜志、冊子