Simplified binding device using spiral coil

Abstract

A simplified and easy-to-use binding device is provided. A plurality of sheets are bound together by inserting a spiral coil through a series of holes punched in each of the sheets at certain intervals. In a first embodiment, a spiral coil having the same pitch as the interval between the holes is used. In a second embodiment, a densely spiraled coil is used. A coil leading guide is prepared for inserting the densely spiraled coil through the holes in the sheets. The coil leading guide has the same pitch as the interval between the holes, and is coupled to the densely spiraled coil through an engaging portion formed in an end portion of the coil leading guide. The coil leading guide is spirally inserted through the holes such that the densely spiraled coil follows the coil leading guide, whereby the plurality of sheets are bound together. There are further employed a base for retaining the sheets from the backside so as to hold the sheets even at edges, and a coil turning aid for pressing the spiral coil from above and turning it.

Dependencies are inferred from the claim text.