| US4315697A | 1982-02-16 | |||
| US4153276A | 1979-05-08 | |||
| US3793016A | 1974-02-19 | |||
| US3794550A | 1974-02-26 | |||
| US4343673A | 1982-08-10 |
| 1. | A method for producing paper sheets adapted to be connected together comprising, providing sheets of paper, and _ applying heatresponsive glue along one edge thereof. |
| 2. | The method set forth in claim 1 wherein said sheets are double size, producing a predetermined fold line dividing said double size sheet into two single size sheets, and applying heatresponsive glue to said double size sheets adjacent said fold line on at least one side thereof. |
| 3. | The method set forth in claim 1 wherein said sheets are double size, applying segments of glue along both sides of the center line of said double size sheets, producing a score line through the glue in each sheet along the center line thereof to provide a center fold line and permit the double size sheet to be printed, 2up, on each side thereof and subsequently folded along said fold line to provide a double sheet assembly and expose glue segments on both sides of said fold line on the outside of the double sheet assembly, thus permitting attachment of a plurality of double sheets by pressing the glue segments together and applying heat thereto. |
| 4. | The method set forth in claim 1 and assembling said sheets with the glue edges in registration, applying heat to the glue edges thereof to acti vate the glue and positively bind said edge's of the sheets together , and pressing the registered glue edges of the assembled sheets together. |
| 5. | The method set forth in claim 4 and producing the desired information on said sheets prior to assembling the sheets together. OMPI . |
| 6. | The method set forth in claim 2 and producing the desired information on said double size sheets 2up on each side, folding said sheets along the fold line to form 5 a double sheet assembly with information thereon, ■$ assembling said sheets with the glue edges in registration, and binding said assembled double sheets together by applying heat and pressure to the glue edge whereby the fold 10 line forms a substantially unrestricted hinge connection between the two individual sheets connected thereby and the glue con¬ nects the double sheet assemblies together. |
| 7. | The method set forth in claim 6 wherein the glue segments are applied along both sides of said fold line to pro 15 vide a glue to glue connection between adjacent double sheet assemblies when the heat and pressure are applied to the glue edges thereof. |
| 8. | The method set forth in claim 1 wherein said sheets of paper constitute single sheets. |
| 9. | 20 9. |
| 10. | The method set forth in claim 4 wherein the steps of applying heat and pressing the glue edges of the assembled sheets together are conducted simultaneously. |
| 11. | A continuous method for producing a bound booklet of sheets of paper with printed information on the sheets 25 wherein said sheets are formed from a sheet of paper which is double the size of the ultimate sheet size to be produced and which has a fold line extending across the center of the sheet to designate the ultimate sheet size without folding the same and which double sheet also has segments of heatrespon 30 sive glue along said fold line, said method comprising, producing printed information on said double Λ size sheet so that two individual sheets are simultaneously printed, folding each double size sheet along said fold 35 line to form a double sheet assembly wherein said fold line forms the hinge connection between said two sheets with said glue segments being positioned on the outside of'said folded double sheet assembly, assembling said folded sheets with other printed sheets with the glue edges along said fold line being in regis¬ tration with the edges of adjacent sheets to be bound thereto, pressing said glue edges together, and applying heat thereto while said sheets are pressed together to activate the glue and bind sheets to said folded sheet assembly while leaving the inside of the fold line free from glue to produce a substantially unrestricted hinge connection between the individual sheets of said folded double sheet assembly with the bound booklet. |
| 12. | The method set forth in claim 8 wherein said printed information is reproduced, 2up, on a copy machine prior to folding the double size sheet. |
| 13. | Apparatus for binding a plurality of sheets of paper together which have heatresponsive glue segments pre applied to the binding edge portions thereof, said apparatus including a bottom pressure plate and a top pressure plate. means for moving said two plates together into opposed clamping position to clamp a plurality of sheets together, and heating means having an upstanding heating element to abut the glue edges of the plurality of paper sheets inserted between said two pressure plates to acti vate the glue and bind the sheets together. |
| 14. | The structure set forth in claim 12 wherein the two plates are hinged together with a pressure bar mounted on the top plate on the opposite side of the upstanding heat¬ ing element from the hinge connection between the plates. |
| 15. | The structure set forth in claim 13 and said heating means including top and bottom heating elements respectively mounted on the top and bottom pressure plates substantially adjacent to the pressure bar and the upstanding heating element. |
| 16. | A prefabricated paper sheet readily bindable into a multiple page booklet and comprising, a sheet of paper. heatresponsive glue segments applied to said paper sheet along a binding line which forms the edge of a bound booklet when assembled with other sheets and which is readily bindable by applying heat and pressure to the glue , 5 segments of the assembled sheets. |
| 17. | **. |
| 18. | The structure set forth in claim 15 wherein said sheet of paper comprises, a double size sheet, a fold line formed across the center of said 10 sheet to divide the same into a pair of sheets, said glue segments being applied to said sheet adjacent said fold line in a manner to expose said glue seg¬ ments when the double sheet is folded along said fold line. |
| 19. | The structure set forth in claim 16 wherein 15 said glue segments are applied to both sides of said fold line. |
| 20. | The structure set forth in claim 15 wherein said glue segments are applied to both sides of said paper sheet along the binding line thereof. ( OMPI *. |
SUMMARY OF THE INVENTION This invention includes the preapplication of a strip of heat-responsive thermosetting glue to the edge por¬ tion of the sheets to produce a bindable sheet which can be 25 run through a copy machine, a typewriter, a word processing printer, or merely handwritten memoranda applied thereto and thereafter, the desired sheets may be quickly and easily assembled and bound together into a neat booklet formed by applying heat to the edge of the assembled sheets while the 30 same are securely pressed together. An alternative form of the invention includes the provision of a fold line extending down the center of a double size sheet with the heat-respon¬ sive glue preapplied adjacent to the fold line so that after ' the desired information is produced on the surfaces of the
35 double size sheet as by copying "2-up" on both sides of the sheet, the sheet may be folded to position the glue strip adjacent the folded edge and the folded double sheets can then be quickly and easily bound together by applying heat
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to the adhesive edges thereof while clamping and binding-the double sheets together in a manner to permit the inside of each fold line to be free from glue and thus, provide a sub¬ stantially free, unobstructed hinge joint between the adjacent folded sheets, while attaching the outside sheet surfaces to the glue edges of adjacent sheets. A modification of the alternative form of the invention is illustrated in Fig. 7 and provides a double glue strip on both sides of the fold line of the double size sheet. . Fig. 8 illustrates still another form of the invention where both sides of a single sheet have a strip of glue applied along the glue edge thereof.
Apparatus for heating and clamping the heat-respon¬ sive glued sheets together is also illustrated in Figs. 1 and 2. DESCRIPTION OF THE * DRAWINGS
Fig. 1 is a perspective view showing apparatus for producing the heat-responsive binding operation;
Fig. 2 is a sectional view of the apparatus shown in Fig. 1; Fig. 3 is a sectional view showing one form of my invention;
Fig. " 4 is an end elevational view showing another form of my invention;
Fig. 5 is a sectional view of the form of the invention shown in Fig. 4 showing a plurality of double sheets connected together;
Fig. 6 is a front elevational view showing a double sheet before folding;
Fig. 7 is a top plan view of a third form-of the invention; and
Fig. 8 is a vertical sectional view of a fourth form of the invention.
DETAILED DESCRIPTION OF * THE * DISCLOSED EMBODIMENTS
As illustrated in Fig. 3, one form of the invention is shown. In this form of the invention, each sheet or layer
10 is provided with a ribbon 10a of a conventional glue which can be activated by the application of heat such as Formula
No. S-6930 manufactured and sold by H.B. Fuller Co., St. Paul,
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Minnesota and also including but not limited to, a hot melt adhesive marketed by the National Starch and Chemical Corpora¬ tion of Bridgewater, New Jersey under their trademark INSTANT-LOK® No. 34-2950, as well as a number of other readily available suitable glue products. The individual sheets 10 with the glue ribbon 10a applied thereto are prepared by a manufacturer and sold as blank sheets to ' which information may be applied in any conventional manner, such as by copying on a conventional copy machine, typing on a typewriter, printing from a word or data processor, or merely handwritten notes and memoranda. Then these sheets may be quickly and neatly bound together along the glue edges thereof by inserting a multi¬ plicity of sheets 10 to be bound into a binding machine 20 as illustrated in Figs. 1 and 2. The binding machine 20 has a bottom pressure plate
21 with a top pressure plate 24 hingedly mounted thereon as by the hinge 24a. A spring 21a normally holds the top pressure plate in raised position. The bottom..heater bar 22 is in the form of an angle member with a horizontal portion 22a mounted on the bottom pressure plate 21 and an upstanding paper abut¬ ment portion 22b extending upwardly therefrom to engage and position the assembled paper sheets inserted between the two pressure plates 21 and 24, A top heater bar 23 is mounted on the top pressure plate 24 above the heater bar 22 and both bars 22 and 23 may be coated with a non-stick surface such as Teflon to prevent glue from adhering thereto. A top clamping bar 25 is also mounted in the top pressure plate 24 on the opposite side of the heater bar 23 from the hinge 24a to securely clamp the assembled sheets down against the top sur- face of the bottom pressure plate 21 during the binding opera¬ tion. An on-off switch 26 is provided for energizing the heater bars 22 and 23 which may be thermostatically controlled by a variable thermostat (not shown) of conventional design with a temperature control knob 27a. Another form of the invention is illustrated in Figs.
4, 5 and 6 wherein double size sheets 30 are initially produced with a fold or score line 30a extending down the center thereof. A ribbon of heat-responsive glue 31 is applied along one side of the fold line adjacent thereto so that when the sheet has
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been folded along said fold line 30a, the ribbon of glue will be disposed along the folded edge of the double sheet. This permits the double size sheet to be printed or copied 2-up on each side (before folding] while still permitting the folded double sheet to be bound together with other double sheets or with single sheets as desired. This is accomplished by assembling the folded sheets with or without single sheets interposed therebetween and inserting the glue edges of the folded sheets between tha pressure plates 21 and 24 of the binding machine 20.
The heater bars 22 and 23 heat the folded glue edges to activate the glue and securely bind adjacent glue edges together. The inside edge surfaces of each double sheet assembly are free from glue. This produces a free, unrestricted hinge joint between the two layers attached only by the fold line 30a. The glued-together joint between adjacent outer sur¬ faces of the folded sheets 30 is more restrictive because the glue ribbon extends inwardly from the edges a slight distance as shown. It is also apparent that a single sheet 10 may be interposed between two pairs of folded sheets (not illustrated) . The fold line 30a can be formed in any conventional manner such as by the score line 30a shown in the drawings.
Since the fold line 3Qa forms the only binding between adjacent sheets, the fold line 30a must be sufficiently dur- able to prevent the sheets from separating during use.
A third form of the prefabricated bindable sheets is illustrated in Fig. 7 wherein the glue strip 31 is applied across the center fold line of the double sheets 30 so that two glue strips 31 are provided. A score line 30a cuts through the layer of glue, dividing it into two glue strips 31 as shown. The paper is also scored along line 30a to permit easy folding of the double sheet along the center fold line 30a.
Still another form of the invention is illustrated in Fig. 8 where a ribbon of glue 32 is applied to both sides of a single sheet 33. This permits a bound-together booklet to be separated and the sheet 33 inserted between the two sep¬ arate sections and rebound by inserting the entire booklet into the binding apparatus.
It will be seen that an extremely simple, yet highly efficient method has been provided which permits the user to bind together previously printed sheets into a booklet which produces a neater and stronger, more durable binding method than stapling or other conventional methods. This neatly bound booklet can be produced quickly and easily as an inline operation to a copying or reproduction process.