March 10, 1925- 1,529,011
R. J. copi-:LAND
BooK yCOVER Filed June 12. 1922 Inventor. Zgw
Patented Mar. 10, y1925.
ROBERT JAMES COPELAND, OF'TORONTO, ONTARIO, CANADA.
`Application.filed June 12, 1922. Serial No. 567,757.
T 0 all whom it may concern: f Y
Be it known that I, ROBERT JAMES COPE- LAND, a subject 0f the King of Great Britain, and resident of the .city of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Book Covers, as described in the following speci- `l'ication and illustrated in the accompanying drawings, that form part of the'same. Y
The objects of this invention are to devise an extremely strong and'rigid cover which will effectively resist wear and will present an attractive appearance.
The principal feature of this invention consists in constructing a cover of a thin sheet of a tough, wear-resisting, nonmetallic material surrounding a rigid core, being lapped over the edges thereof.
A further important feature Of the invention consists in the novel manner of forming the core of a plurality of parallelly arranged channel-shaped rigid members.
In the drawings Figure 1 is a perspective view of a cover constructed in accordance with this invention, a portion being cut away. Y
Figure 2 is an enlarged longitudinal sectional view of the cover.
Figure 3 is an enlarged cross sectional view.
Figure 4 is a small perspective view showing a modified construction.
In my previous application, Serial No. 494,197 I have shown and described a book cover formed of a plurality of thin sheets of tough, wear-resisting, non-metallic material and this invention is an improvement over the structures described in the said application in that the thin sheet vulcanized fibre material is lapped around a core and the doubled edges present Vexceptional strength against bending.
In the structures illustrated Figures l and 2 the outer covering is lapped over the side edges 1 and 2 but the front ed e vand even the back edge if desired may be ormed by doubling over the thin tough, wearresisting sheet material as illustrated in Figure 4. The lapped over side pieces 3 are cut away a suiiiclent depth to allow the doubled over front edge 4 tO rest on the same p-lane with the doubled over side edges.
Within the outer case thus formed is arranged a reinforced core preferably formed of a plurality of metallic strips 5 of channel shape in cross section. These strips may be filled by strips of cardboard G if desired. Between the strips 5 are arranged strips of mill board 7 of equal thickness to the strips 5. V,
These several members are secured together at their ends -by U-shaped strips 8 of sheet metal or vulcanized fibre and the outside dimensions o-f these U-shaped strips correspond with the inside dimensions of the doubled over outer cover 1.
Flat sheets 9 preferably of thin, vulcanized fibre of a corresponding thickness to the material of the strips 8 are placed upon the core between the edge strips and are securely cemented in place. The core thus formed presents a solid support for the outer case l.
IVhen the Outer case is formed around the core it is rigidly secured by cementing and the cementing is preferably augmented by rivets 10 which pass through the entire structure.
In the form shown in Figures 1 and 2 the front edge of the cover is formed by inserting a heavy strip 11 of vulcanized fibre between the edges of the outer case 1, this strip being of the same thickness as the core.
At the rear or hinge edge of the cover suitable hinge strips 12 are inserted and are securely riveted in place.
A cover such as described will be extremely rigid, though not over heavy and the formation of the doubled over edges together with the transverse channel-shaped reinforcements effectively resists warping or distortion.
hat I claim as my invention is 1. A book cover, comprising, a rigid core, and a sheet of thin vulcanized fibre placed `upon the outer face of the cover and having the edges thereof bent around the edges of the core and covering the inner face thereof, said fibre sheet be-ing rigidly and permanently secured to said core.
2. A book cover, comprising, a rigid core, a strip of vulcanized fibre of the same thickness Vas the core arranged along the front edge thereof, and a sheet of thin vulcanized fibre covering the outer face Of said core and strip and bent around the side edges and Covering the inner face thereof, said fibre sheet being rigidly and permanently secured.
3. A book cover, comprising, a plurality of flanged strips of rlgid material, vspacing members arranged between said strlps, and
a sheet of thin, tough, wear-resisting nonmetallie material surrounding said core and rigidly secured thereto. Y
4. ln a book cover, a plurality of channelshaped metallic strips parallelly arranged, spacing strips arranged between said channel strips, a folded strip of material embracing the ends of the aforesaid strips, and a sheet of thin, tough, wear-resisting nonmetallio material surrounding the core thus formed.
5. In a 'book Cover, a pair of metal strips U-shaped in Cross section, a plurality of channel-shaped metallic strips having their ends inserted into said U-shaped strips and extending therebetween, spacing strips arranged between said metal strips', flat 'sheets of thin, tough, material Covering the strips held between said Ushaped strips, said sheets lilling the space between said edge strips, and an outer cover of a thin, tough, wear-resisting, nonmetallie material lapped over the U-shaped metallic strips and having the edges abutting and rigidly secured.
6. ln a book cover, a rigid core, a reinforcement of thin sheet material bent around the edgeof the Core, and a sheet of thin, tough, wear-resisting, non-metallic material n lapped around the reinforced edges.
7. ln a book cover, a core formed of a plurality of strips of rigid material having their longitudinal edges abutting, reinforcing means connecting the ends of said strips, and a sheet of thin vulcanized fibre lapped over the edges of said core and fastening means inserted through said enveloping sheet and the reinforcing means.
ROBERT JAMES COPELAND.