US1548188A

US1548188A - Book cover

Info

Publication number: US1548188A
Application number: US494197A
Authority: US
Inventors: Robert J Copeland
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-08-22
Filing date: 1921-08-22
Publication date: 1925-08-04
Anticipated expiration: 1942-08-04

Description

Aug. 4, 1925. 1,548,188

R. J. COPELAND BQOK COVER Filed Aug. 22, 1921 j 6 Y m \\\\m &\\\\\\\\\ F i/91 2 I Patented Aug. 4, 1925.

1,548,18&

ROBERTMJ. Goran-Ann, or 'roito1vro,:.o1\irARio;" CANADA.

BOOK COVER? Application filed August22, ser-ia 1n6.494;1avfi- To all who'm it lay concern Be it known that I, ROBERT JAMES Corn- LAND, a subject of 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, described in the following specification and illustrated in the accompanying drawings, that form part of the same. i

The objects of this invention are to provide book covers of a very durable form which may be utilized on many different kinds of books but will be particularly adapted to books of the loose leaf class on account of the low cost.

The principal features of this invention consist in forming a cover of a plurality of laminations presenting at the outer wearing edges a. surface of tough wear resisting nonmetallic material and in securing between such lan'iinations the edges of a sheet of flexible material which is doubled to form a tubular section to receive the locking mechanism used in loose leaf books and which is usually encased in metal.

In the drawings Figure 1 is a perspectiv view of my improved cover.

Figure 2 is a longitudinal sectional view.

Figure 3 is a sectional view of a slightly modified form.

Figure 4 is a. sectional view of a. still further modified form.

Vulcanized fibre is produced in a great variety of thicknesses and single sheets are prone to warp and change their shape. This material has a grain and if a plurality of sheets are rigidly secured together the warping tendency of one sheet will counteract the other, as also will the arrangement of the grain assist in maintaining the composite sheet fiat.

In the form shown in Figures 1 and 2, a pair of thin sheets 1 and 2 of vulcanized fibre or similar wear resisting homogeneous material are secured by gluing or cementing to the outer faces of a sheet 3 of lighter and softer material such as mill-board and the composite sheet thus formed is securely riveted through adj acent to the edges. The rivets 4 hold the fibre facings in close engaging contact with the mill-board and fibre sheets though very thin will protect the mill-board from being broken, dinged or beat and the mill-board' gives its-"strength and non-warping feature to the fibre.

Prior to cementing the several sheets of material together a. binding strip 5 formed of a suitable flexible fabric is doubled and the edges 6 thereof areinserted between the facing sheets and the mill-board. A flexible loop to receive the locking member 7 for loose leaf books is thus firmly secured on one end of the cover. The looped fabric is preferably stitched longitudinally parallel with the cover back to form the hinge portion 8 between the bar 7 and the back.

A modified structure is shown in Figure '3 where a mill-board centre sheet 9 is arranged between two thin facing sheets 10 of vulcanized fibre or similar material, the mill-board sheet being of lesser width and length than the fibre sheets. Edge strips 11 of fibre the same thickness as the mill-board are inserted between the. edges of the facing sheets, preferably at the sides and the free end of the cover and. the strips and sheets are securely riveted together. The facing sheets are also riveted to the mill-board.

A further modification is shown in Figure 4. A plurality of very, thin sheets of fibre are cemented together, face to face, and the composite sheet is subjected to a heavy pressure to press out any local inequalities in the various sheets. The composite sheet after being pressed is then securely riveted along the edges so as to'hold the sheets in close contact, thereby preventing the loosening of the cement.

Vulcanized fibre will withstand a. great deal of wear and a book back made of laminations of such material will be practically indestructible.

It will be readily understood that covers constructed as herein described will not require the employment of expensive labour and they can be turned out in large quantities at very low cost.

lVhat I claim as my invention is z 1. A book cover formed of a plurality of thin sheets of vulcanized fibre, and means extending through said sheets for rigidly securing them together.

2; A book cover, comp-rising, laminations of a vulcanized fibre, and an intervening sheetof material of a different kind interposed therebetween, the whole being rigidly secured together.

3. A book cover, comprising, a sheet of mill-board, thin sheets of hard fibre cemented to the opposite faces of the mill-board, and rivets extending through said mill board and fibre sheets around the edges.

4:. A book cover, comprising, a core, a pair of sheets of thin hard fibre of greater Width and length than the core and cemented to the core, strips of hard fibre inserted between the edges of the fibre sheets extending beyond the core and having their outer edges flush With the edges of the fibre sheets,

and rivets extending through said fibre sheets and the intervening members rigidly securing them together.

5. A book cover comprising a sheet of homogeneous Wear -resisting material, a frame of similar material secured to the face of said sheet With its outer edges flush with the edges of the sheet, a filler sheet enclosed by said frame, and a covering member of Wear resisting material secured to the frame and extending over the filler.

ROBERT J. COPELAND.