Hole-punching and binding apparatus for papers

A hole-punching and binding apparatus for papers, comprising:

• a casing;
• a hole-punching device drivable to move along a vertical direction, the hole-punching device including a cutter seat carrying thereon a plurality of cutters that are equidistantly spaced in a row to punch a row of holes in a stack of papers, the cutter seat being movable in a hole-punching travel, the hole-punching device including a row of compartments, each said cutter being freely movable in the compartments, respectively, a slidable shield being mounted above each said cutter for optionally stopping an associated said cutter to make the associated cutter to move along with the cutter seat during the hole-punching travel of the cutter seat;
• a resilient load-on plate acting as a lever, the resilient load-on plate being adapted to retain each of a plurality of open ended helical coils to extend the open ended helical coils through punched holes in the stack of papers, the resilient load-on plate including an end tightly bearing against the stack of papers, and including a paper thickness scale to indicate the thickness of the stack of papers;
• a margin-adjusting device including a paper depth-fixing plate that abut against aligned edges of the stack of paper to adjust an entering depth of the stack of papers into the hole-punching device, such that the hole to be punched by each said cutter has a pre-set margin to the aligned edges of the stack of paper;
• a coil-closing device drivable to move along a horizontal direction, a fixed plate being secured to the casing, the stack of papers that have been punched being placed between the coil-closing device and the fixed plate so as to be pressed to close an open end of each said open ended helical coil, the coil-closing device further including a projection;
• and
• an adjustable baking cam for adjusting a travel of the coil-closing device, the coil-closing device is stopped when the projection of the coil-closing device contacts with the braking cam.