US 2790651 A
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Description (OCR text may contain errors)
April 30, 1957 T. w. WINSTEAD 2, ,6
PLASTIC BOOK BINDER Filed Feb. 13, 1953 v, u a
INVENTOR THOMAS W. WINSTEAD ATTORNEYS United States Patent ice Patented Apr. 30, 1957 PLASTIC BOOK BINDER Thomas W. Winstead, Baltimore, Md., assignor to Hedwin Corporation, Baltimore, Md., a corporation of Maryland Application February 13, 1953, Serial No. 336,765
6 Claims. (Cl. 281-29) This invention relates generally to bookbinding and more particularly to an improved book binder and the method of forming the same.
The art of bookbinding extends back to early times and modern day practices are a far cry from, and a great improvement thereover. However, when ornamentation is combined with the most modern bookbinding practices, a number of difiiculties of a very practical nature arise. Among these are a difiiculty of producing ornamental book binders without unduly increasing their cost, an inability to produce a variety of designs when costs are kept down, and a lack of flexibility of manufacture in producing book binders embodying critical reinforcing or variations in decoration, embossing and printing.
Accordingly, the chief object of the present invention is to provide an improved book binder and method of forming the same which will obviate the above-mentioned difliculties characterizing known book binders and methods of forming the same.
Another important object of the present invention is to provide a plastic binder for books which may be readily used with standard bookbinding procedures.
A further important object of the present invention is to provide a plastic binder for books which may be readily glued or stapled thereto and sealed to a plastic cover compatible therewith.
A still further important object of the invention is to provide a plastic binder for books and method of forming the same which will permit a wide variation in the ornamentation of, printing on, and reinforcing of the covers and back thereof.
Another object of the invention is to provide an improved book binder which is adapted for use with conventional book binding processes or with loose-leaf sheets and their retaining rings and supports.
Other objects and advantages of the present invention will become apparent during the course of the following description.
In its broadest aspects, the invention contemplates a vinyl coated fabric which may be glued or stapled to a conventional sheet assembly as in bookbinding procedures or fastened to a ring binder mechanism and then joined by heat scaling to a cover assembly of plastic which is compatible with the vinyl coated fabric, the covers being ornamented, printed or reinforced in any of a great variety of ways.
In the drawings, I have shown different embodiments of the invention. In these showings:
Figure 1 is a perspective view of one form of the invention showing its use with a loose-leaf binder device;
Figure 2 is a fragmentary horizontal sectional view thereof to an enlarged scale taken on the line 22 of Figure 1;
Figure 3 is a fragmentary horizontal sectional view of a modified form of the invention as used with a loose-leaf ring binder.
Referring to the drawings and particularly to the form of the invention illustrated in Figures 1 and 2, numeral terials which are embossed as desired for strength as at 27 or for ornamentation and with printing as shown at 29. The hinge 28 is formed of a fabric coated on one side with a thermoplastic such as vinyl and is secured to the covers 22 and 24 by heat sealing. Being compatible, the two plastic surfaces bond. It will be appreciated that either one or both surfaces of the covers 22 and 24 may be embossed in an identical or differing manner. The pages comprising the book may now be glued, stapled or otherwise secured to the hinge 28 as in present bookbinding practice.
As shown in Figures 1 and 2, the hinge 28 comprises the means of attaching loose-leaf pages and their support ing device 30 to the book binder 20. The mechanism 30 is of conventional structure comprising an elongated arch portion 32, a backing piece 34 which is clamped to the arch 32 by means of prongs, etc., and a plurality of spaced leaf-engaging rings 36 which may be opened at will by pressure upon the upturned ends of the arch 32.
The vinyl plastic coated hinge 28 is clamped between the arch 32 and the backing piece 34 during the assembly of the device 30 and the hinge is then secured to the inner edges of the covers by heat sealing. The binder back 26 is then heat sealed to the outer edges of the cover to complete this form of the binder. The covers 22 and 24 may be formed of a flexible or a relatively stiff thermoplastic, as desired.
The structure of the embodiment as shown in Figure 3 is identical with that just described with the exception that the covers 122 and 124 and the binder back 126 are integral and all formed of one sheet of an embossed vinyl thermoplastic.
It will now be readily apparent that the various forms of binder comprising the present invention constitute an important advance in the art in that a more economical binder enabling a greater variation in decoration, embossing, printing and reinforcing is thus provided. The various elements of the binders 20 may, of course, be formed in any desired thickness or dimension combinations. While I have referred to the use of a vinyl thermoplastic, any thermoplastic having similar properties may be substituted therefor.
It is to be understood that the forms of the invention herewith shown and described are to be taken as a preferred example of the same and that various changes in the shape, size and arrangement of parts may be resorted to without departure from the spirit of the invention or the scope of-the subjoined claims.
1. A plastic binder for books comprising a pair of thermoplastic covers and a back connecting said covers, and a flexible book-supporting hinge connecting said covers and spaced from said back by said covers.
2. A plastic binder for books comprising a pair of thermoplastic covers and a back connecting said covers, and a flexible book-supporting hinge spaced from said back by said covers and connecting said covers on the sides thereof opposite the connecting back, said back and said hinge being connected to said covers by heat sealing.
3. A plastic binder for books as claimed in claim 1, and wherein said back is integral with said covers.
4. A plastic binder for books as claimed in claim 1. and wherein said covers and back are formed from a single sheet of plastic material.
5. A plastic binder for books comprising a pair of thermoplastic covers and a back connecting said covers, and a flexible book-supporting hinge spaced from said back by said covers and connecting said covers, said hinge comprising a strip of fabric having a thermoplastic coating on the surface adjacent said covers.
6. The method of" forming a thermoplastic binder for books comprising the steps of coating one side of a fabric hinge strip adaptedto support a book with athermop1astic,,lieat sealingtlie edges of sai d: hinge strip tothe inner edges of a pair of thermoplastic covers, andheat sealing a thermoplastic back to theouter edges of said covers in spaced relationship to said hinge, all of said thermoplastics beingcompatible.
References Cited in the file of'this patent UNITED- STFATES PATENTS Trussell Feb. 22, 1921 Egerton Dec. 15, 1925 Fortier Sept. 7, 1937 Schade Dec. 4, 1945 Schade e Mar. 24, 1953