Today, a variety of different bookbinding systems can deliver professional bound documents, including books, manuals, publications, annual reports, newsletters, business plans, and brochures. A bookbinding system generally may be classified as a commercial (or trade) bookbinding system that is designed for in-line manufacturing of high quality volume runs or an in-house (or office) bookbinding system designed for short “on-demand” runs. Commercial bookbinding systems generally provide a wide variety of binding capabilities, but require large production runs (e.g., on the order of thousands of bindings) to offset the set-up cost of each production run and to support the necessary investment in expensive in-line production equipment. Office bookbinding systems, on the other hand, generally involve manual intervention and provide relatively few binding capabilities, but are significantly less expensive to set up and operate than commercial bookbinding systems, even for short on-demand production runs of only a few books.
In general, a bookbinding system collects a plurality of sheets (or pages) into a text body (or book block) that includes a spine and two side hinges areas. The bookbinding system applies an adhesive to the text body spine to bind the sheets together. A cover may be attached to the bound text body by applying an adhesive to the side hinge areas or the spine of the text body, or both. The cover of a typical commercial soft cover book generally is attached to the text body spine. The covers of hardcover books and some soft cover “lay flat” books, on the other hand, typically are attached to the side hinge areas of the text body and are not attached to the text body spines (i.e., the spines are “floating”).
Many different systems have been proposed for applying adhesive to a text body spine to bind the text body sheets together.
For example, U.S. Pat. No. 6,024,525 describes a bookbinder that includes a tape heating apparatus with a main heater and a pair of side heaters. The main heater is configured to heat the entire length of a hot melt adhesive tape. After the spine of a text body is pressed against the preheated hot melt adhesive tape, the pair of side heaters press the overhanging sides of the adhesive tape against the text body to complete the binding of the sheets into a bound text body.
U.S. Pat. No. 5,346,350 discloses an apparatus for binding sheets that includes an aligning plate that aligns the sheets at the spine edge, and two clamping plates that hold the sheets during binding. A heating platen heats and melts a backless solid hot melt adhesive that is placed along the sheet edges. The hot melt adhesive binds the sheets together at the spinal area.
U.S. Pat. No. 4,925,354 discloses an apparatus for applying adhesive to books which extrudes lengths of adhesive from a high pressure glue gun onto a roller. The books are conveyed into contact with the adhesive on the roller and the adhesive is transferred from the roller to the book. A scraper removes excess adhesive from the roller and the removed adhesive is collected in a reservoir for reuse.
The hot melt adhesive also may be used to attach a preformed book cover to the text body spine.
International Patent Publication No. WO 99/38707 discloses a paperback bookbinding scheme in which a cover with an adhesive strip disposed along a spine area is forced between a pair of pressing rollers to form a pocket, and a text body is inserted into the pocket with the text body spine in contact with the adhesive strip. The pressing rollers move forcibly toward one another to compress the cover firmly against the front and back sides of the text body and to compress the text body sheets together tightly in the area adjacent to the spine. A sonic tool transmits sonic energy to the cover to activate the adhesive strip and, thereby, bind the text body sheets and the cover into a perfectly bound book.
U.S. Pat. No. 4,911,475 discloses a bookbinding construction in which sheets are bound together into a book block by two or more spaced-apart transverse segments of adhesive. The front section of a cover is attached to the first page of the book block and the back section of the cover is secured to the last page of the book block. Upon opening the book or turning a page, glue-free portions of the spine edge of the open page flex or bow outward over the facing page in a wedging manner or interfering fit. According to the '475 patent, this wedging action against the opposite page resists the tendency of the book to spring closed and forces the pages of the book to lie flat.
U.S. Pat. No. 5,271,794 discloses an adhesive applicator that is configured to spread coat an adhesive onto the spine and side edges of a text body to bind the text body sheets and a cover into a perfectly bound book with an attached spine. The adhesive applicator includes a book spine coating nozzle with adjustable side sealing jaws for adjusting the nozzle width for different book thicknesses and separate side glue outlets for depositing glue on the book sides. Glue flow control valves are disposed between the spine coating nozzle and the side glue outlets so the glue deposited on the book sides may be selectively and independently cut off or controlled.
Still other bookbinding systems have been proposed.
Systems and methods are described for binding a plurality of text bodies in a continuous manner.
According to one aspect, a system of binding a plurality of text bodies, comprises an adhesive strip applier configured to apply a preformed adhesive strip to a spine of a moving text body, a heating device arranged to heat the adhesive strip applied to the spine of the text body and melt the adhesive strip into contact with the moving text body, and a cooling device arranged to cool the adhesive on the moving text body.
According to another aspect, a system of binding a plurality of text bodies, comprises an adhesive strip applier configured to apply preformed adhesive strips comprising solid adhesive to spines of a plurality of moving text bodies, an activating device arranged to liquify the adhesive strips on the plurality of moving text bodies, and a text body transporting system configured to transport the text bodies through the adhesive strip applier and the activating device at a substantially constant velocity.
According to a further aspect, a method of binding sheets into a bound text body, comprises applying a preformed adhesive strip to a moving text body, heating the adhesive strip on the moving text body to melt adhesive from the strip into contact with the moving text body, and cooling the adhesive on the moving text body.
According to an addition aspect, a system for binding a plurality of text bodies, comprises transfer means for transferring a preformed adhesive strip to a spine of a moving text body, heating means for melting the adhesive strip into contact with the moving text body, and cooling means for cooling the adhesive on the moving text body to form a bound text body.
Exemplary embodiments are illustrated in the accompanying drawings, in which like elements bear like reference numerals, and wherein:
The text bodies 110 in the embodiment of
According to one example, the conveyor system 116 transports the text bodies 110 in the direction of the arrow A at a substantially constant velocity V0 through the binding system 100. Accordingly, multiple text bodies 110 may be bound in a continuous manner to improve the throughput of a bookbinding system.
In one sheet binding embodiment, text body 110 may be bound with a solid hot melt adhesive as follows. An adhesive dispensing system (not shown) disposes a preformed solid hot melt adhesive strip 120 onto the adhesive strip applier 102. The adhesive strip 120 is delivered to the edge of the text body 110 by the adhesive strip applier 102. A spot heater can tack the dispensed adhesive strip 120 to the text body spine. An adhesive dispensing system can cut the adhesive to a desired length and/or width or the adhesive strip 120 can be loaded precut into the bookbinding system. One example of an adhesive dispersing system is described in WO 02/090122 published Nov. 14, 2002 to John P. Ertel and entitled “DISPENSING SOLID SHEET ADHESIVE IN A BOOKBINDING SYSTEM,” which is incorporated herein by reference in its entirety.
The adhesive heating device 104 heats the preformed solid hot melt adhesive strip 120 to a temperature at or above the melting temperature of the adhesive. The melted liquid adhesive conforms to the exposed surface features of the spinal area of the text body 110 and flows into spaces between the ends of sheets. The heating device 104 can also include a forming device, such as forming rollers 150, 152, 154 or pinch rollers which form the melted adhesive to a text body spine 122. Adhesive cooling device 106 cools the formed adhesive until the adhesive re-solidifies to bind the text body sheets into a bound text body.
Although a heating device 104 has been described, other activating devices may also be used depending on the adhesive employed. For example, light cured adhesives may be used with an illuminating activating device.
After formed hot melt adhesive has re-solidified to bind the text body sheets into a bound text body, the bound text body may be subjected to one or more additional processing steps. For example, a cover 124 may be attached to the bound text body as described in co-pending U.S. patent application Ser. No. 09/721,549, filed Nov. 24, 2000 by Robert L. Cobene et al., and entitled “SYSTEMS AND METHODS OF ATTACHING A COVER TO A TEXT BODY,” U.S. patent application publication number US 2002/0119029, published Aug. 29, 2002 to Robert L. Cobene et al., and entitled “SYSTEMS AND METHODS OF REGISTERING A COVER WITH RESPECT TO A TEXT BODY,” and U.S. patent application Ser. No. 10/231,037, filed Aug. 30, 2002 by Robert L. Cobene et al., and entitled “AN APPARATUS AND METHOD FOR ATTACHING A COVER TO AN ASSEMBLY OF SHEETS,” which are incorporated hereby by reference in their entirety.
According to the example of
A variety of different adhesive compositions may be used to bind the text body sheets, including a conventional paper-backed hot melt sheet adhesive that may be dispensed from a roll and may be obtained from Minnesota Mining and Manufacturing Company (3M), of St. Paul, Minn., United States. The size of the adhesive strips needed can be calculated from the size, number, and thickness of the sheets in the text body. The size and shape of the adhesive strip can also be measured from the clamped text body. One example of an adhesive dispenser which trims adhesive strips to a desired size is described in U.S. patent application publication number U.S. 2002/0168248, published Nov. 14, 2002 to John P. Ertel et al., and entitled “DISPENSING ADHESIVE IN A BOOKBINDING SYSTEM.”
In
The text body 110 proceeds from the heating device 104 to the cooling device 106. In the example of
In the embodiments illustrated in FIGS. 1 and 2A–2D, the text body is conveyed in a direction which is substantially parallel to a length of the spine of the text body or parallel to the length dimension L of the text body. In this arrangement, the adhesive strip applier 102, 202, heating device 104, and cooling device 106, can be arranged as close together as possible so that more than one of these devices is operating on the same text body at the same time. Further, the individual text bodies 110 may be mounted on the conveyor 116 by the clamps 112 as close together as practical to achieve efficient and continuous binding of the text bodies.
In operation, the adhesive strip 420 enters in a nip between the pinch roller 406 and the transfer roller 404 and is attracted to the transfer roller surface due to the low pressure area 418. The low pressure area has a pressure PL lower than atmospheric which causes the adhesive strip 420 to be retained on the perforated surface of the outer rotatable roller 414. As the adhesive strip is transported by rotation of the outer roller 414 to the area adjacent the high pressure area 422, the high pressure PH (higher than atmospheric) within the transfer roller forces the adhesive strip 420 away from the transfer roller and onto the text body. The adhesive strip 420 is subsequently heated by the heating device 330 to melt the adhesive onto the text body 410.
As shown in
In sum, the above-described embodiments incorporate novel systems and methods for binding a text body in a manner that may improve the performance and cost-effectiveness of desktop and office on-demand bookbinding systems.
Referring to
Although in the above-described embodiments the preformed hot melt adhesive is heated by a contact heater, other methods of heating the adhesive may be used. In some embodiments, a radiant heater (e.g., a tungsten core quartz lamp) may be used to melt the hot melt adhesive. In another embodiment the transfer roller may also perform the heating function.
While the invention has been described in detail with reference to the preferred embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made and equivalents employed, without departing from the present invention.
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Number | Date | Country |
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WO9938707 | Aug 1999 | WO |
WO02090122 | May 2002 | WO |
Number | Date | Country | |
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20040240966 A1 | Dec 2004 | US |