US1791459A - Bookbinding - Google Patents

Description

Feb. 3, 19315 R, c, BAKERA 1,791,459

BooKBINDING Filed Dec. :51. 1928 Patented Feb. 3, 1931 IED STAT ROY C. BAKER, O VIOLLASTON, MASSACHUSETTS, ASSIGNR OF ONE-FIFTH TO LOUIS A. JGNES, OF BELMONT, IASSACHUSETTS BOGKBINDING Application lefl December 31, 1928. Serial No. 329,504.

This invention relates to book bindings, and will be best understood by reference to the fol lowing description, when taken in connection with the accompanying drawings illustrating a completely bound book and component parts thereof embodying the invention, while its scope will be more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a perspective view of a book having a binding embodying my invention;

Fig. 2 is a perspective view of a super embodying one feature of the invention, together with a back lining attached thereto;

Fig. 3 is a perspective view of a group of signatures prepared for binding;

Fig. 4 is an elevation of a portion of the super on an enlarged scale as compared with Fig. 2;

Fig. 5 is a perspective view of the signatures with the super and back-lining5 Fig. 6 is an elevation of a casing embodying another feature of the invention, comprising a pair of cover boards with reinforcing strips applied to their adjacent or hinge edges, and covered with material which connects the boards; and

Fig. 7 is a sectional view on an enlarged scale on line 7-7 of Fig. 6.

Referring to the drawings, and to the embodiment of the invention which is illustrated therein, there is shown in Fig. 3 a group of signatures 10 prepared in the usual manner, and in readiness to be case bound. In Fig. 6, there is shown a case comprising cover boards 11 covered in the customary way with sheet material 12 such as cloth or leather, which connects the cover boards to each other and is folded about the edges and onto the inner faces of the cover boards in the usual manner.

One weakness of bindings. as heretofore made, is that the super which forms the cover hinges is secured by an adhesive directly to the cover boards which are usually made of relatively soft, laminated stock. V ery often, the super tears away from the cover boards, taking with it a layer of the cover board. @ne feature of my invention is the provision of strips 13 of kraft paper or cloth, folded to embrace the hinge edge of each cover board (sec Fig. 7), and fastened to both faces and to the edge of the cover board by a suitable adhesive. Villen, therefore, the super is fastened to these strips, the strain is transmitted to the entire cover board, and the durability of the binding is greatly increased, because there is little or no tendency for the super to tear away from the cover board.

In Fig. 6, there is shown a complete casing having a usualcover back-lining 14, secured by an adhesive to the covering 12, and having its vends overlapped by the turned over margins of the covering. This casing, as shown, is of usual construction, except that the cover boards 11 are provided with the described strips 18.

The usual method of binding is to secure the head bands to the signatures, then to secure the super to the signatures between the head-bands, and finally to secure the backlining to the super. In the method disclosed in Letters Patent No. 1,665,049, issued to me April 3, 1928, the back-lining has the headbands secured to it first, and the back-lining is secured to the super before the latter is secured to the backs of the signatures. Either of these methods may be employed in connection with my present invention. In Fig. 2, the method disclosed in my aforesaid patent is employed, and there is shown a, back-liningl 15 to which head-bands 16 have been attached prior to the attachment of the backlinin to thenovel super now to be described.

Of course, the strongest bindings heretofore employed have been sewed or laced,- but suoli bindings are relatively expensive, and

the cost is prohibitive for books of some classes. In accordance with my present invention, I employ a super which produces an exceptionally strong binding, far sunerior to the binding employing the super heretofore employed, and approaching, if not eqn-ailing, in strength sewed or laced bindings. To this end, I provide a super 17, which may be muslin or crash starched after weaving to give it stiffness and strength, but while supers, as heretofore made, have been made of plain cloth without reinforcement, I have provided the super with reinforcing members 1S, whose durability, tensile strength and resistance to the wear of bending are greater than that of the remainder of the super.

These reinforcing members may be applied to or incorporated in the super in any appropriate manner, as by incorporating them in the fabric while it is being woven. One convenient method is to provide the warp with reinforcing members, such as strings or cords relatively larger and heavier than the remaining strands of the warp. In Fig, 4, the super is shown as a sheet of muslin having between the reinforcing warp members 18 other warp members, such as threads 1f), and there are similar weft threads .El interwoven with the warp threads and with thehcavy reiiiforcing members 18.

'hcn the super is applied, these reinforcing members extend transversely of the signatures and of the hinge edges of thc cover boards (see Figs. l and 5). These reinforcing members strengthen the hinges enormously, and impart to them a durability comparable with those of a sewed or laced binding. The cost of this novel super, moreover, compares very favorably with the cost of an ordinary super, and adds no labor cost to the binding operations. 1When this novel super is secured by a suitable adhesive to the strip 13, and to the backs of the signatures, there is produced a binding which possesses a degree of resistance to wear and rough handling, which is quite remarkable, and yet, owing to its slight expense, may be employed in the binding of books which are sold on a highly competitive basis. School books, which fall in this class, but which are subjected to rough handling and much abuse, are given tremendous increase of resistance to wear and shock.

The end lining papers 2l are secured by a suitable adhesive to the cover boards l1, t0 the margins of the super 20, and to the folded over edges of the covering l2. The bulk of the reinforcing` strands 18 is not great enough to produce objectionable irregularity of the surfaces of the lining papers.

Having thus described one embodiment of the invention, but Without limiting myself thereto, what I claim and desire by Letters Patent to secure is.:-

l. A book wherein there is a group of signatures, a pair of cover boards, and hinges connecting said cover boards to said signatures, characterized by the fact that each hinge comprises a sheet of material having a series of reinforcements extending across the space between said signatures and the adjacent cover, said reinforcements having a substantially greater durability than that of the remainder of said sheet.

2. A book wherein there is a set of signatures and a super attached thereto, characterized by the fact that said super comprises bers extending transversely of the backs a. sheet of material having a series of reinforcements extending transversely of the backs of said signatures, said reinforcements having a durability substantially greater than that of the remainder of the super.

3. A book wherein there is a set of signatures and a super attached thereto, characteriZed -by the fact that said super comprises a sheet of material having a series of memof said signatures, said members having a substantially greater degree of resistance to thel wear caused by bending than is possessed by the remainder of said super.

l. A book wherein there is a set of signatures and a super attached thereto, characterized by the fact that said super comprises a sheet of material having a series of inembers extending transversely of the backs olf said signatures, said members having a tensile strength substantially greater than that of the remainder of the super.

5. A book wherein there is a set of signatures and a super attached thereto, characterized by the fact that said super comprises a sheet of woven material having its warp disposed `transversely of the backs of said signatures and comprisingl a series of warp members whose durability is substantially greater than that of the remaining warp members.

6. A book wherein there is a set of signatures and a super attached thereto, characterized by the fact that said super comprises a sheet of woven material having its warp ldisposed transversely of the backs of saitL signatures and comprising a series of spaced cords, and threads of smaller cross section than saidcords in the spaces between said cords.

In testimony whereof, I have signed my name to this specification.

ROY C. BAKER.

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