Mechanism
A typical hole punch, whether a single or multiple hole punch, has a long lever which is used to push a bladed cylinder straight through a number of sheets of paper. As the vertical travel distance of the cylinder is only a few millimeters, it can be positioned within a centimeter of the lever fulcrum. For low volume hole punches, the resulting lever need not be more than 8 cm for sufficient force.
Two paper guides are needed to line up the paper: one opposite where the paper is inserted, to set the margin distance, and one on an adjacent side.
Hole punches for industrial volumes — hundreds of sheets — feature very long lever arms, but function identically.
Another mechanism uses hollowed drills which are lowered by a screwing action into the paper. The paper is cut and forced up into the shaft of the drill to be later discarded as tightly packed columns. This method allows a small machine to cut industrial volumes of paper with little effort.
Read more about this topic: Hole Punch
Famous quotes containing the word mechanism:
“Ive never known a Philadelphian who wasnt a downright character; possibly a defense mechanism resulting from the dullness of their native habitat.”
—Anita Loos (18881981)
“The law isnt justice. Its a very imperfect mechanism. If you press exactly the right buttons and are also lucky, justice may show up in the answer. A mechanism is all the law was ever intended to be.”
—Raymond Chandler (18881959)
“A mechanism of some kind stands between us and almost every act of our lives.”
—Sarah Patton Boyle, U.S. civil rights activist and author. The Desegregated Heart, part 3, ch. 2 (1962)