GB2186526A

GB2186526A - Cover for binding documents

Info

Publication number: GB2186526A
Application number: GB08622996A
Authority: GB
Inventors: David Freestone-Barks
Original assignee: EASIBIND Ltd
Current assignee: EASIBIND Ltd
Priority date: 1985-09-25
Filing date: 1986-09-24
Publication date: 1987-08-19
Also published as: GB8923735D0; GB8523634D0; GB2223450B; GB2184981A; GB2186526B; GB2223450A; GB8622996D0; GB2184981B

Abstract

The cover comprises a front cover leaf 11 and a rear cover leaf 15 interconnected by a spine portion 12, the spine portion having applied to its internal surface a layer of flexible tear resistant reinforcement material 32 encapsulated within a band of hot melt adhesive 30. <IMAGE>

Description

1 GB 2 186 526 A 1 SPECIFICATION embedded within the band of adhesive and

is arranged to extend across substantially the entire A cover width a nd 1 e ngth of th e ba nd 30 a nd be spaced fro m the internal surface of the spine portion 12. The The present invention relates to a cover for binding 70 rei nforceme nt materia 132 is eh osen so as to be of documents and a method of producing such a porous to the melted glue and is preferably formed cover. from a strip of woven material which is woven to In our U.K. Patent 2072096 we have disclosed a provide a fine weave which enable the melted glue coverfor use with thermal binding machines and the to penetrate slowlythrough the weave. By adopting present invention is particularly concerned with a 75 such a fine weave, the woven material 32 retains its similartype of cover. spaced relationship from the internal surface of the The cover disclosed in our U.K. Patent2072096 is spine portion during the binding of loose leafs into basicallyformed from a sheet of scored card and a the cover.

layer of hot melt adhesive. The particular The provision of the layer of reinforcement construction of cover disclosed functions adequately 80 material 32 enables thick stacks of leafs to be to bind individual sheets of a stack of sheets to the successfully bound within the cover and enablethe cover irrespective of the thickness of the stack. coverto be opened 1800 repeatedly without However, with repeated opening and closing of the breakdown of the bonding of individual leafsto the coverthere is a tendency, particularly with thicker spine portion.

stacks of leafsJorthe glueto separatefrom the card 85 In a preferred method of forming a cover, a blank and thereby odd leafs may become dislodged. This of card is stored to provide at leastfold lines 17,18 separation is thoughtto be due to the surface layer of and whilstthe blank is in a flat condition a first layer the card separating f rom the remainder of the card. of hot melt glue is extruded onto the blank so as to It is a general aim of the present invention to coverthe area between fold lines 17,18 and also provide a coverfor use with a thermal binding 90 extend acrossthefold lines 17,18. Whilstthefirst machine which overcomes or substantially reduces layer of hot melt glue is still hotthe layer of the above drawback. reinforcement material 32 is applied to its surface According to one aspect of the present invention and is centrally positioned relative to the fold lines there is provided a cover comprising a frontcover 17,18. Preferablythe width of the reinforcement leaf and a rear cover leaf interconnected by a spine 95 material is slightly less than the distance between portion, the spine portion having applied to its fold lines 17,18. Application of the reinforcement internal surface a layer of tear resistant flexible material to thefirst layers of glue results in melted reinforcement material encapsulated within a band glue penetrating the reinforcement material and this of hot melt adhesive. the reinforcement material is securely bonded in According to another aspect of the present 100 position relative to the spine portion.

invention there is provided a method of producing a A second layer of hot melt adhesive is then applied cover as defined above, the method including to the first layer of adhesive,the second layer being forming a spine portion in a blank of sheet material sufficiently hot and sized to completely coverthe and applying to the internal surface thereof a band of reinforcement layer and cause at least peripheral hot melt adhesive having a layer of tear resistant 105 melting of thefirst layer. Thus the first and second flexible reinforcement material encapsulated layers of hot melt glueform a unitary band of glue therein. withthe reinforcement material being encapsulated Various aspects of the present invention are therein.

hereinafter described with reference to the Whilstthefirst and second layers are in a melted accompanying drawings, in which:- 110 condition, the blank is folded aboutfold lines 17,18.

Figure 1 is a schematic perspective view of an

Claims

embodiment according to the present invention; and CLAIMS

Figure2 is an end view of the cover shown in Figure 1. 1. A cover comprising a front cover leaf and a The cover illustrated in Figure 1 is shown generally 115 rear cover leaf interconnected by a spine portion, the at 10 and includes afront cover leaf 11 hingedly spine portion having applied to its internal surface a connected to a spine portion 12 by afold line 14.A layer of flexible tear resistant reinforcement material rear cover leaf 15 is hingedly connected to the spine encapsulated within a band of hot melt adhesive.

portion 12 byafold line 16.
2. A cover according to Claim 1 wherein the layer The spine portion 12 is of channel shape and 120 of reinforcement material is spaced from the internal preferably includes a pair of spaced fold lines 17,18 surface of the spine portion.

to thereby form discrete channel sidewall portions
3. A cover according to Claim 1 or 2 wherein the 20,21 and a channel base portion 24. reinforcement material is a finewoven fabric.

A band 30 of hot melt adhesive is provided which
4. A cover according to any preceding claim is bonded to the internal surface of the spine portion 125 wherein the spine portion is channel shaped having so as to extend along substantially the entire length a pair of sidewall portions separated by a base of the spine portion and also extend across the width portion, the band of adhesive covering the base and of the base and across at leastthe bottom marginal at leastthe marginal bottom portions of said sidewall portion of each channel sidewall portion 20,21. portions.

A layer of flexible reinforcement material 32 is 130
5.A cover according to Claim 4 wherein the layer 2 GB 2 186 526 A 2 of reinforcement material is located generally centrally relativeto said base portion and has a width slightly lessthan said base portion.
6. A cover substantially as described herein with reference to and as illustrated in the accompanying drawings.
7. A method of producing a cover according to Claim 1, the method including forming a spine portion in a blank of sheet material and applying to the internal surface thereof a band of hot melt adhesive having a layer of tear resistantflexible material encapsulated therein.
8. A method according to Claim 7 wherein said band of hot melt adhesive is formed by applying in a molten condition a first layer of hot melt adhesive to said spine portion, subsequently applying said layer of flexible material to said first layer of adhesive whilst it is still in a molted condition, and subsequently applying in a molted condition a second layer of hot melt adhesive so as to coversaid layer of reinforcement material and form a unitary bond with said first layer of adhesive.
9. A method of forming a cover substantially as described herein with reference to the accompanying drawings.

Printed for Her Majesty's Stationery Office by Croydon Printing Company (1] K) Ltd,6187, D8991685. Published by The Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies maybe obtained.