JPH1067189A - Method and apparatus for bookbinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and apparatus for bookbinding capable of implementing bookbinding with an appropriate quantity of an adhesive at all times; moreover, executing bookbinding promptly, and being matched with a high speed recording device. SOLUTION: A rear adhesive tape 4 is obtained in such a manner that an adhesive made by heat-melting a code-like heat melt adhesive 40 is applied at predetermined width on the adhesive surface of an adhesive tape 32. The rear adhesive tape 4 is supplied on a bookbinding table 22, and the tip end peripheral part of a bundle of sheets being arranged in its tip end is pressed on the adhesive to take the adhesive therein, followed by folding the adhesive tape 32 parts at both the sides of an adhesive layer of the rear adhesive tape 4 to be bonded onto the front and rear cover paper of the bundie of sheets. After that, the bundle of sheets with the rear adhesive tape 4 is cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of stacking a large number of sheets such as printed matter and copies discharged from an image forming apparatus such as a printer and a copying machine, and joining the sheets to each other on one side of a sheet bundle. The present invention relates to a bookbinding method and a bookbinding apparatus for performing bookbinding.

[0002]

2. Description of the Related Art Conventionally, when a book or a booklet is created by binding a sheet bundle in which a large number of sheets are stacked, a simple binding method of the sheet bundle includes a method such as staple binding.

On the other hand, in order to improve the appearance of a book or a booklet, or to make the book or booklet storable semipermanently, there is a method of binding using a backing tape coated with a heat-sensitive adhesive. In this bookbinding method, a large number of sheets are stacked, the front cover and the back cover are overlapped on the upper and lower surfaces, and the backing tape is cut to an appropriate length.
A central portion serving as a spine of the spine tape is applied to one side of the sheet bundle. Then, the adhesive of the backing tape is heated and melted, and the central portion of the backing tape is pressed against the side surface of the sheet bundle to be bound. Then, both sides of the central portion of the back adhesive tape are bent and attached to the front cover and the back cover, and after a sufficient time has elapsed until the adhesive is bonded to the sheet, the pressure and the heating are stopped. After the adhesive is cooled and solidified, the finished book or booklet is taken out of the bookbinding apparatus. As described above, a simple bookbinding technique for simply binding a printed matter or a copy is known.

[0004] In this case, as the backing tape to be used, generally, a tape-like base material made of paper or the like and having a predetermined width applied with a hot-melt adhesive on one side in advance is used. As this conventional backing tape, a tape is proposed in which an adhesive is applied only to a central portion in the width direction of one surface of a tape-shaped base material, and a portion having a margin where no adhesive is applied is applied to a portion in contact with both covers. (JP-A-2-52667).
The margin is said to prevent the hot-melt adhesive from protruding onto the cover during the bookbinding process.

Various bookbinding apparatuses using a conventional backing tape have been proposed (JP-A-63-17).
3695, JP-A-63-236993, JP-A-1-16
6993 and JP-A-3-132396), each of which uses a back-adhesive tape to which a hot-melt adhesive is applied in advance, and basically aligns the edges with the means for stacking copy sets on a tray. Means, means for supporting and heating the tape of the backing tape to soften the adhesive, and means for pushing the edge of the copy set into the softened adhesive layer. These binding devices are:
It is connected to a copying machine online, and the copied copy is supplied to a bookbinding apparatus as it is, bundled, and bound.

[0006]

However, the above-mentioned conventional backing tape and bookbinding apparatus have various disadvantages as described below.

In the bookbinding method using a backing tape to which a hot melt has been applied in advance, a hot-melt adhesive for adhering a copy is applied only to the center in the width direction of the tape and is applied in a convex shape. I have. For this reason, when binding a small number of sheets having a thickness smaller than the adhesive application width, the excess hot-melt adhesive is applied between the backing tape and the front cover and between the backing tape and the back cover. However, there is a drawback that the shape of bookbinding is difficult to form.

Further, when binding a sheet bundle discharged from a copying machine, a laser printer, or the like (hereinafter, referred to as a recording device), the number of sheets discharged from the recording device per unit time is more than the number of sheets discharged per unit time. The number of sheets that can be bound in a book is smaller. In particular, in a bookbinding apparatus that uses a backing tape to which a hot-melt adhesive has been applied in advance, in order to heat and melt the hot-melt adhesive applied to one side of a base material such as paper, Sufficient heat must be transferred to the adhesive through the adhesive. For this reason, the time required for melting the adhesive is long, which is a factor of prolonging the bookbinding time. Therefore, especially when the high-speed printing apparatus and the bookbinding apparatus are connected online, the bookbinding apparatus cannot perform the bookbinding process continuously with the sheet flow in the printing apparatus.

Further, although the amount of adhesive required varies depending on the number of sheets to be bound, a bookbinding apparatus using a backing tape to which an adhesive has been applied in advance, when binding a small number of sheets, uses a backing tape and a cover. There is a disadvantage that the excess hot melt swells between the back adhesive tape and the back cover, making it difficult to form a book.

The present invention has been made in view of the above-mentioned problems, and it is possible to perform bookbinding with an appropriate amount of adhesive at all times, to quickly perform bookbinding, and to match with a high-speed recording apparatus. It is an object to provide a possible bookbinding device and bookbinding method.

[0011]

According to the present invention, there is provided a bookbinding apparatus comprising: a backing tape supply unit for supplying a backing tape coated with a hot-melt adhesive; a sheet bundle supplied; A bookbinding unit that binds the spine portion of the sheet bundle with the adhesive to perform bookbinding, wherein the bookbinding unit aligns lower end edges of the sheet bundle and the back-attached tape has a hot-melt adhesive. A bookbinding table supplied with a layer upward, pressing means for pressing the sheet bundle in its thickness direction, and bending the back adhesive tape on the bookbinding table by lifting both side edges thereof to form the front and back covers of the sheet bundle. A backing tape supply unit, the backing tape supply unit comprising: an adhesive tape reel wound with an adhesive tape; an adhesive reel wound with a string-like hot-melt adhesive; and the bookbinding the adhesive tape. Towards the table A conveying roll to be fed, and the heating and melting of the cord-like hot-melt adhesive, and applying this to the adhesive surface of the adhesive tape being conveyed on the conveying roll in a width corresponding to the thickness of the sheet bundle. And a melting member.

Further, the bookbinding method according to the present invention comprises a step of applying a heat-fused adhesive to a pressure-sensitive adhesive surface of a pressure-sensitive adhesive tape at a predetermined width to obtain a backing tape; Pressing the side edges of the sheet bundle having the aligned leading edges, bending the both sides of the adhesive layer of the backing tape to adhere to the front and back covers of the sheet bundle, and the backing tape And a step of cooling the bonded sheet bundle.

In the present invention, immediately before bookbinding, a hot-melt adhesive is supplied on the pressure-sensitive adhesive tape by heating and melting at a width corresponding to the bookbinding thickness to form an adhesive layer having a width corresponding to the bookbinding thickness. I do. Then, the back portion is pressed against the adhesive layer and the back portion is pressed against the adhesive layer and the back portion is supplied to the back adhesive tape, and the adhesive tape portion of the back adhesive tape where the adhesive is not applied is applied to the front and back covers of the sheet bundle. Press and glue. As described above, according to the present invention, the hot-melt adhesive is applied onto the adhesive tape immediately before bookbinding with a width corresponding to the bookbinding thickness, so using this backing tape, the backing tape and the front and back covers are used. There is no extra swelling of the adhesive in the extra portion, and a beautifully finished book can be made. Further, according to the present invention, immediately before binding, the cord-like hot-melt adhesive is melted and the melted adhesive is supplied onto the adhesive tape. There is no need to heat and melt the adhesive, and bookbinding can be performed quickly. In addition, since the adhesive part of the front and back covers is used as it is with adhesive tape that does not need to be melted, it can be bound quickly, and even in a short time where unsolidified parts remain on the back part, Since the pressure-sensitive adhesive tape is adhered, the sheet bundle can be discharged to a post-process, which can also speed up the bookbinding process.

[0014]

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In this embodiment, the bookbinding apparatus of the present invention is connected to a recording apparatus for recording information on paper, such as a copying machine and a laser printer. 1 is a side view of the bookbinding apparatus of the present embodiment, FIG. 2 is a front view of the same, FIG. 3 is an enlarged side view of the bookbinding table of FIG. 1, and FIG. 4 is a top view.

As shown in FIG. 1, a sheet such as a printed matter or a copy discharged from the information recording apparatus 1 is fed to a bookbinding apparatus 2 of the present embodiment. In the bookbinding device 2, a stacker unit 5 is arranged on the recording device 1 side, and a bookbinding unit 6 is provided downstream thereof.
Is arranged.

In the stacker section 5, a stacker 11 is installed in the vicinity of the recording paper (sheet) discharge roll 3 of the recording apparatus 1 so as to incline with the front side downward. The bundle of discharged sheets 21 is stacked on the stacker 11. At the front end of the stacker 11, a stopper 12 is provided upright, and each sheet 21 abuts the stopper 12,
Its front edges are aligned. A rear jogger 14 is provided at the rear end of the stacker 11. The rear jogger 14 swings and pushes the rear edge of the sheet 21 toward the front stopper 12 to align the sheets 21. Although not shown, side joggers are also provided on both sides of the stacker 11, and the side joggers move close to and away from the sheets 21 stacked on the stacker 11, and The edges are aligned. Therefore, the sheet 21 on the stacker 11 is
The stopper 12, the rear jogger 14, and the side jogger are used to adjust the edge.

A transport arm 15 is supported by the stacker unit 5 so as to swing on a fulcrum shaft 18 and to be movable in the longitudinal direction of the fulcrum shaft 18. 16 are provided. The fulcrum shaft 18 is disposed in a direction orthogonal to the sheet conveyance direction from the recording apparatus 1, and as shown in FIG.
Are arranged at both ends. The interval between the transfer arms 15 is wider than the width of the sheet 21. In addition, a pair of transfer arms 15
A single screw shaft 20 is screwed between the central portions of the two.
The screw shaft 20 is screwed to one transfer arm 15 with a right-hand screw, and screwed to the other transfer arm 15 with a left-hand screw. Therefore, when the screw shaft 20 is rotated in one direction, the pair of transfer arms 15 move by the same size so as to approach each other, and when the screw shaft 20 is rotated to the other side, the transfer arms 15 Move by the same size so that they are separated from each other. Thereby, the interval between the transfer arms 15 can be adjusted. The clamp lever 16 disposed at the leading end of each transport arm 15 is rotated by the clamp cam 17, whereby the sheet 21 is moved.
Of the bundle can be grasped or released.

At a position where the transport arm 15 is inclined, the clamp lever 16 grasps the side edge of the bundle of sheets 21 on the stacker 11 and when the transport arm 15 falls down until it becomes horizontal, the bundle of sheets 21 is bound to the bookbinding unit 6. Carry in. As shown in FIG. 3, in the bookbinding section 6, a base 48 is provided.
A rail 49 is arranged on the base 48 so as to extend in a horizontal direction orthogonal to a sheet conveying direction from the recording apparatus 1. Rollers 50 are provided on the bookbinding table 22, and the rollers 50 are guided by the rails 49 and move on the rails 49, whereby the bookbinding table 22 reciprocates in a horizontal direction perpendicular to the sheet loading direction. be able to. The sheet 2 sent by the transfer arm 15 is placed on the bookbinding table 22.
A back plate 28 is provided upright so as to be in contact with the back of one bundle. A pressing plate 29 is supported on the wall 38 facing the back plate 28 so as to be able to move close to and away from the back plate 28. Back plate 2 in bookbinding table 22
A hot plate 23 is provided at the bottom between the press plate 8 and the pressing plate 29. The surface of the heating plate 23 is flat, and a heater 24 is disposed inside the heating plate 23. The heating plate 23 is partitioned by a heat insulating material 25. A backing tape 4 to be described later is fed onto the hot plate 23, and wedge-shaped folding members 26 and 27 are provided on both sides of the backing tape 4 with the ends of the wedges at the hot plate 23.
It is arranged so as to enter between the back adhesive tape 4 and the back. The folding members 26 and 27 are connected to a link 30 so that the folding member 26 pivots clockwise in FIG. 3 and the folding member 25 pivots counterclockwise in FIG. Lift the edge and bend it,
The sheet 21 is brought into contact with the front and back surfaces.

On the other hand, as shown in FIG. 2, in the bookbinding section 6, a supply section of the backing tape 4 is arranged on one side in the moving direction of the bookbinding table 22, and on the other side, a bookbinding section is provided. A discharge / cooling unit for the discharged sheet bundle is disposed.

In the supply section of the backing tape 4, a reel 31 around which an adhesive tape 32 serving as a base material of the backing tape is wound, and a reel 39 around which a string-like hot-melt adhesive 40 is wound, have their shafts. Are arranged in a horizontal direction orthogonal to the moving direction of the bookbinding table 22. The adhesive tape 32 unwound from the reel 31 includes two pairs of tape transport rolls 33, 3
4, the paper is fed horizontally to the bookbinding table 22, and further sent out to the bookbinding table 22 from a pair of transport rollers 35, 36 disposed downstream of the two pairs of transport rollers 33, 34. The center portion of the transport roll 36 is cut off as appropriate, and the roller 36 does not contact the hot melt on the adhesive tape 32 at this portion. Each of the rolls 33, 34, 35, 36 is provided with a ceramic coating so that the adhesive does not adhere thereto.

A cutter 37 is disposed between the two pairs of transport rolls 33 and 34, and the adhesive tape is cut by the cutter 37. The operation of the cutter 37 is controlled by an appropriate control device, and is controlled so as to cut the adhesive tape into a length matching the width of the sheet 21 sent from the recording device 1.

A hot melt gun 42 is disposed between the transport rolls 33, 34 and the transport rolls 35, 36. Above the hot melt gun 42, a pair of cord-like adhesive transport rolls 41 is arranged, and the cord-like adhesive 40 unwound from the reel 39
1 and is sent out toward the hot melt gun 42. The hot melt gun 42 is provided with a heater in the vicinity of the tip of the discharge port. The hot melt gun 42 heats and melts the string-like adhesive 40, and passes the molten adhesive horizontally below the adhesive. Supply on tape 32.

The hot melt gun 42 can reciprocate in a direction orthogonal to the direction in which the adhesive tape 32 is fed, and is reciprocated in this direction at an appropriate speed and moving width under the control of a control device. The moving width of the hot melt gun 42 is determined by the thickness of the sheet bundle, and based on the data of the sheet type (thickness) and the number of sheets input from the recording apparatus 1, the control device determines the thickness of the sheet bundle. Is calculated, and the moving width of the hot melt gun 42 is determined.

As shown in FIGS. 2 and 4, a cooling box 7 is disposed downstream of the bookbinding table 22. A pair of discharge rolls 43 and 44 are arranged with their rotation axes vertical at positions matching the leading end of the bookbinding table 22 when the bookbinding table 22 is moved to the cooling box side most. The discharge rolls 43 and 44 hold the sheet bundle bound by the bookbinding table 22 and send it out to the cooling box 7 by rotation.

As shown in FIG. 6, in the cooling box 7, a bundle of sheets after bookbinding is fed between the surrounding frames 46 at a relatively small interval, and the bottom thereof is a swingable bottom plate shutter 4.
5, the sheet bundle after cooling is released from the bottom plate shutter 45.
Is discharged downward by the rotation of.

Next, the operation of the bookbinding apparatus configured as described above will be described. First, data relating to the type of sheet recorded, such as the size and thickness, and the number of sheets of a bundle to be bound are input from the recording device 1 to the control device of the bookbinding device 2. Then, the bookbinding table 22 moves to the side of the transport rollers 35 and 36, and is ready to receive the spine tape 4. Then, the adhesive tape 32 is unwound from the reel 31, and the adhesive tape 32 is transported by the transport rolls 33 and 34 and the transport rolls 3.
The paper is fed toward the bookbinding table 22 by 5 and 36. Also,
String-like hot-melt adhesive 4 unwound from the reel 39
0 is supplied to a hot melt gun 42 via a roll 41, and is heated and melted by the hot melt gun 42,
The adhesive tape 32 which is fed in a molten state from the hot melt gun 42 to the bookbinding table 22 below the hot melt gun 42.
Supplied above. In this case, since the hot melt gun 42 reciprocates in the width direction of the adhesive tape 32 and the adhesive tape 32 moves in the longitudinal direction, as shown in FIG. Applied wavy on top. The application width of the molten adhesive, that is, the movement width of the hot melt gun 42 is determined by the number of sheet bundles input from the recording apparatus 1, and is assumed to match the thickness of the sheet bundle.

Then, as shown in FIG. 1, the sheet 21 is discharged from the recording apparatus 1 onto the stacker 11, and the recording process for one book is completed from the recording apparatus 1, and the sheet for one book is transferred to the stacker 11 as shown in FIG. Upon receiving a signal indicating that all the sheets have been ejected, the control device of the bookbinding apparatus 2 clamps the bundle of sheets 21 on the stacker 11 with the clamp lever 16 of the transport arm 15, and the transport arm 15 rotates while being clamped. Then, the sheet 21 moves toward the bookbinding table 22.

Immediately before the bundle of sheets 21 reaches the bookbinding table 22, the transport arm 15 stops temporarily, and the pressing plate 29 advances to press the bundle of sheets 21 against the back plate 28,
Correct and align the bends and bulges of the bundle. The pressing force of the pressing plate 29 at that time is detected by a pressure sensor (not shown) to control the pressing force. As described above, this pressing force is controlled by slightly reducing the pressing force after the pressing for correcting the bending and bulging of the sheet 21, and the pressing plate 29 and the The light can pass through the rear plate 28 in parallel.

Next, the transport arm 15 is rotated again, and the bundle of sheets 21 is pressed onto the hot-melt adhesive applied to the spine tape 4 on the bookbinding table 22.

Then, the bundle of sheets 21 is pressed into the layer of hot-melt adhesive on the adhesive tape 32. In this case, when the molten adhesive enters between the sheets 21 of the sheet bundle, the molten adhesive is cooled by the sheet bundle, so that the adhesive is maintained in a molten state by the heater 24 arranged in the hot plate 23. Heated to a degree and kept warm.

The pressing plate 29 is attached to the back plate 28 with the sheet 21.
At the same time as pressing and clamping the bundle, the clamp lever 16 of the transport arm 15 operates to release the clamped state, and the transport arm 15 returns to the stacker position to prepare for clamping of the next recording sheet bundle.

Then, as shown in FIG. 3, first, the folding member 26 is rotated clockwise, and the portion of the adhesive tape 32 of the back adhesive tape 4 where no molten adhesive is present is attached to the front cover of the sheet bundle. Subsequently, when the folding member 27 is pushed by the link 30 and moved toward the sheet bundle, the folding member 27
Abuts against the recording paper bundle 21, and the folding member 27 rotates counterclockwise around the abutted tip,
Adhesive tape 3 without back glue of backing tape 4
Paste part 2 on the back cover.

Thereafter, the bookbinding table 22 is moved in the direction of the cooling box 7 so that the sheet bundle after binding is discharged into the discharge rolls 43 and 44, the pressing plate 29 is loosened, and the clamped state is released. Thereafter, the sheet bundle is pressed by the discharge rolls 43 and 44, and the adhesive tape 32 of the back adhesive tape 4 is sufficiently attached to the front cover and the back cover. In this way, even when the sheet bundle is discharged to the cooling box 7 by the discharge rolls 43 and 44, the discharge rolls 43 and 44 can be used even if the adhesive force is insufficient only by pressing by the folding members 26 and 27.
And completely adhered.

The cooling box 7 is a room made of a material having good heat dissipation, and cools the recording sheet bundle while holding the hot melt portion melted by its own weight. At this time, since the back adhesive tape 4 and the cover have already been fixed, although the hot-melt adhesive is still in the process of curing, it can be moved before complete solidification, and the station can be moved quickly. Is possible.

The sheet bundle that has been cooled and bound is discharged to the binding pool by opening the bottom plate shutter 45 after an appropriate time. In this way, a series of bookbinding steps is completed.

As the base material used for the hot-melt adhesive tape used in the present invention, various materials such as paper, woven fabric, nonwoven fabric and aluminum foil, as well as films such as polyester, terephthalate and polycarbonate can be used. In addition, hot melt adhesives are those whose adhesiveness is activated by heating, for example, polyethylene copolymers typified by ethylene vinyl acetate copolymer, polyamides, polyesters, polybutyral, and the like. Used.

The tape sticking mechanism rotatably holds, on a support shaft of the housing, a rolled back sticking tape in which an acrylic adhesive is applied as a pressure-sensitive adhesive to one side of a polypropylene resin tape body, for example. ing.

The length of the backing tape is usually substantially equal to the length of the paper ejected from the recording apparatus, but the width of the tape is determined by turning the corners of the paper and wrapping a portion of the side of the paper upward. Is preferably slightly larger than the thickness of the article to be bound so that The tape can be selected from tapes of various widths, previously cut to various standard dimensions, but may instead be cut to the desired length when binding.

In the above embodiment, the sheet binding apparatus is connected to the recording apparatus, and the processing is performed online so as to be continuous with the sheet flow in the recording apparatus. It may be something. In this case, the number or thickness of sheets to be bound by the binding apparatus may be input to the operation panel. Instead of the data input, the thickness of the sheets stacked on the tray may be detected by a suitable detecting device.

FIG. 6 is a timing chart of signals in the above embodiment.

[0041]

As described above, according to the present invention,
The hot melt adhesive is applied on the adhesive tape just before bookbinding with the width according to the bookbinding thickness, so use this backing tape to apply extra adhesive between the backing tape and the front and back covers. No swelling and beautiful bookbinding can be done. Further, according to the present invention, immediately before binding, the cord-like hot-melt adhesive is melted and the melted adhesive is supplied onto the adhesive tape. There is no need to heat and melt the adhesive, and bookbinding can be performed quickly. In addition, since the adhesive part of the front and back covers is used as it is with adhesive tape that does not need to be melted, it can be bound quickly, and even if unsolidified parts remain on the back part, the front and back covers and adhesive tape are adhered. As a result, the sheet bundle can be discharged to a subsequent process, which can also speed up the bookbinding process.

[Brief description of the drawings]

FIG. 1 is a side view showing a bookbinding apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged side view showing the bookbinding table of FIG. 1;

FIG. 4 is a top view of the embodiment.

FIG. 5 is a top view showing the back adhesive tape.

FIG. 6 is a view showing a structure of a cooling box 7;

FIG. 7 is a timing chart of each signal of the present embodiment.

[Explanation of symbols]

 1: Recording device 2: Bookbinding device 3: Discharge roller 4: Back adhesive tape 5: Stacker section 6: Bookbinding section 7: Cooling box 11: Stacker 12: Stopper 14: Rear jogger 15: Transport arm 16: Clamp lever 17: Clamp Cam 18: fulcrum shaft 20: screw shaft 21: sheet 22: bookbinding table 23: hot plate 24: heater 25: heat insulating material 26, 27: folding member 28: back plate 29: pressing plate 30: link 31, 39: reel 32 : Adhesive tape 33, 34, 35, 36, 41: transport roller 37: cutter 40: string-like hot-melt adhesive 42: hot melt gun

Claims (2)

[Claims] 1. A backing tape supply section for supplying a backing tape coated with a hot-melt adhesive, a sheet bundle is supplied, and a back portion of the sheet bundle is bonded by the adhesive of the backing tape. In the bookbinding apparatus having a bookbinding unit, the bookbinding unit aligns the lower edge of the sheet bundle and the backing tape is supplied with its hot-melt adhesive layer facing upward, and a bookbinding table. Holding means for pressing the sheet bundle in the thickness direction thereof, and a bending member for bending the back adhesive tape on the bookbinding table by lifting both side edges thereof and adhering to the front and back covers of the sheet bundle; The tape supply unit is an adhesive tape reel wound with an adhesive tape, an adhesive reel wound with a cord-like hot-melt adhesive, and a transport roll that feeds the adhesive tape toward the bookbinding table, String-like heat melting property A bookbinding apparatus comprising: a melting member that heats and melts the adhesive and applies the adhesive to the adhesive surface of the adhesive tape being transported on the transport roll in a width corresponding to the thickness of the sheet bundle. 2. A step of applying a heated and melted adhesive to the adhesive surface of the adhesive tape with a predetermined width to obtain a backing tape, and a sheet bundle having the leading ends aligned on the adhesive of the backing tape. Pressing the side edge of the backing tape, bending the both sides of the adhesive layer of the backing tape to adhere to the front and back covers of the sheet bundle, and cooling the sheet bundle to which the backing tape is adhered. And a binding step.