US 2336856 A
Description (OCR text may contain errors)
D. 14, 1943. A, FEUNDUCH 2,336,856
SPIRALLY-BOUND BOOK Filed Feb. 1'7, 1.945
ATTORNEYS satented Dec. M, i943 SPIRALLY BOUND BOK Application February 17, 1943, Serial No. 476,169
This invention relates to books lbound with a spiral or other convoluted member and particularly members made of plastic material. The object of the invention is to so bind the book that the pages thereof shall be securely retained in position, that neither end of the binding member be exposed, and that the outer ends of the binding member reinforce or strengthen the binder and book edges.
In the drawing, Fig. 1 represents a plan view of a bound book opened substantially in the central portion thereof; and Fig. 2 represents a section on the line 2--2 of Fig, l.
The book consists of a multiplicity of sheets l, having a series of aligned perforations 2 along their bound edges and a binding member 3 made of plastic, more particularly the eXible type of plastic, formed in a spiral or convolutions, and passing through the perforations 2.
The two free ends i of the spiral binder 3 are p-assed twice through a substantial number of the aligned perforations at both ends of the book, whereby the free ends l are positioned well inside of the front and back portions of the book, preferably about in the middle line of the book. The additional portion 5 of the end of the binding member is then passed or bent around the major portion 5 of the terminal convolutions. It will be noted by reference to Fig. 2 that each terminal convolution 6 passes through terminal perforations and, by the doubling over of the free ends of the binding member, the additional portions 5 pass through but part of the total number of y perforations, thereby centering the free ends il within the two covers of the book. Each free end fi is preferably bent to the form of a. loop l around the major portion 6 of each terminal ring, loosely embracing it. When the book is opened and closed the free ends of the binder can readily slide lupon the main portion of the binder, the additional portion and the main portion of the terminal convolutions accommodating themselves to the movement of the pages of the book as it is opened and closed.
1. A book having a series of aligned perforations along an edge thereof, all of said perforations being of substantially like diameter, a convoluted member passing through said perforations and terminating near both outer edges of the book, a portion of the terminal ends of said binder passing through the same perforations through which the last full convolution of the binder passes, the said terminal end being looped around the last full convolution and slidably arranged thereon.
2. A book according to claim 1, in which the end of the binder passes through but a portion of the total number of perforations and is positioned inside of the covers of the book and looped around the last full convolution.