Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42C—BOOKBINDING
  • B42C9/00—Applying glue or adhesive peculiar to bookbinding
  • B42C9/0006—Applying glue or adhesive peculiar to bookbinding by applying adhesive to a stack of sheets
  • B42C9/0012—Applying glue or adhesive peculiar to bookbinding by applying adhesive to a stack of sheets with a roller

Definitions

• the invention pertains to a wheel applicator device for
• a driven applicator wheel capable of rotating around a horizontal axis; the lower part of the applicator wheel being immersed in the glue tank filled with adhesive; the top apex line of the upper peripheral surface of the applicator wheel being situated on a plane in which the book spines to be glued are being pushed forward at adjustable speed by the conveyors and guides of a bookbinding machine, so that the adhesive which was picked up in the lower part of the glue tank and which is adhering to the periphery of the applicator wheel is transferred to the book spines; the peripheral velocity of the applicator wheel being coordinated with the transport speed of the book blocks, the direction of the wheel's rotation in the upper area corresponding to the feed direction
• Wheel applicators of this type are known and are used to apply
• liquids especially adhesives, in the processing of, for example,
• this coupling is implemented in such a way that the wheel applicator is flanged by its housing or frame to the bookbinding
• a coupling of this type between a wheel applicator device and a bookbinding machine suffers from the several disadvantages. It takes a great deal of mechanical work to assemble and disassemble the flange joint between the bookbinding machine and the wheel applicator, and the necessary fastening means must be provided on both devices. When a wheel applicator is to be used alternately on different bookbinding machines, either the dimensions of the flange
• connection must be identical, or custom-made adapters must be
• the flange joint must also be fabricated with special precision to ensure trouble-free, low-loss transmission of the mechanical power required to drive the wheel applicator, this power being transmitted by means of gear wheels, which must themselves be precisely aligned. This precision fabrication is required to ensure that the applicator wheel is positioned accurately vis-Avis the book spines to be glued.
• the task is accomplished in that a wheel applicator of the type indicated above is given its own drive
• the drive wheel is driven by a drive unit independent of the bookbinding machine, the power being supplied by an electric motor; the speed of the drive wheel is no longer controlled "mechanically", as in the state
• a spinner roll driven by the drive unit, is installed parallel to and behind the applicator wheel, i.e., behind in terms of the direction in which the book blocks are being conveyed.
• This spinner roll can be brought into contact with the layer of adhesive which has been transferred to the book spines.
• This spinner roll has the function of pressing the adhesive which has been applied to the spine into the intermediate spaces between the individual pages of the book and of removing excess adhesive from the spine. It is advantageous in this case for the spinner roll to turn in the direction opposite that of the applicator wheel and for the distance between the spinner roll and the plane of the book spines to be adjustable, because this makes it possible to improve the application of the adhesive and to improve the quality of the adhesive bond.
• the wheel applicator device and especially the applicator wheel itself can be easily positioned with respect to the bookbinding machine. It is advantageous for the actual height of the frame and/or of the applicator wheel to be visibly displayed on a display unit so that the
• the entire wheel applicator device can be moved around on rollers, which are attached to the stand.
• the device can thus be moved to the desired location and immobilized by the use of clamps, which lock the rollers. This is highly advantageous, because the wheel applicator can thus be positioned very quickly and conveniently at different bookbinding machines.
• the horizontal position of the wheel applicator can be adjusted by simply pushing the stand; the vertical alignment can be adjusted by manual actuation of an adjusting device.
• the field of application of the device can be expanded even more by mounting the applicator wheel and the spinner wheel on an exposed part of the frame, which can be moved underneath the conveyors and guides of the bookbinding machine.
• the applicator wheel and the spinner wheel on an exposed part of the frame, which can be moved underneath the conveyors and guides of the bookbinding machine.
• the applicator wheel and/or the glue tank are preferably heated electrically or by means of a fluid thermal transfer medium, so that the fluid- dynamic properties of the adhesives used can be controlled by the input of thermal energy. In this way, it becomes possible either
• a built-in doctor blade device at the bottom of the glue tank, near the lower part of the applicator wheel consisting of a step located approximately at the lowermost point of the wheel periphery and extending axially with respect to the wheel, this step being located between a first curved section of the glue tank relatively far away from the peripheral surface of the wheel and a second curved section, following in the direction of rotation, relatively close to the peripheral surface.
• Figure 1 shows a front view of a wheel-type applicator device
• Figure 2 shows a side view of the wheel applicator device
• Figure 3 shows a top view onto the wheel applicator device of
• Figure 4 shows a cross section of an embodiment of a glue
• Figure 5 shows a top view onto the glue tank shown in Figure 4 without the applicator wheel and spinner roll;
• Figure 6 shows an embodiment of a drive unit with electric motor, transmission unit, applicator wheel, and spinner roll in partial cross section.
• a frame 2 which extends essentially in a horizontal plane, is connected in this embodiment of the wheel applicator to a vertically oriented gear column 6, belonging to a machine stand 4.
• the lower end of gear column 6 is rigidly connected to two horizontal
• crossbraces 8 designed as hollow sections, which are in turn welded at their ends to two beams 10.
• Two rollers are provided on the bottom of each of the two beams 10, which means that the entire wheel applicator device 1 can be rolled around on machine stand 4.
• Wheel applicator 1 can thus be immobilized in the desired location.
• gear column 6 is provided on its external side with teeth in the manner of a toothed rack and is held inside a bearing block 14 in such a way that it can neither slide in the axial direction nor rotate; the bearing block is rigidly connected to the bottom of frame 2, and a plurality of teeth on gear column 6 engage with a pinion (not shown) supported inside bearing block 14.
• This pinion can be turned by a hand crank, which operates a gear box also mounted inside bearing block 14.
• frame 2 therefore moves up or down in the vertical direction depending on the whether hand crank 16 is turned clockwise or counterclockwise; the frame can be locked at the desired height by means of a clamp device (not shown), which is a component of bearing block 14.
• a drive motor can also be used to adjust the height of the frame in this way.
• the range over which the frame can be adjusted is about 100 mm.
• a distance pickup is mounted on bearing block 14; in cooperation with a pulse transmitter attached to gear column 6, such as a transmitter in the form of a magnetically coded tape measure, this pickup makes it possible to determine the position of the frame relative to gear column
• a drive unit 22 consisting of an electric motor 18 and a transmission unit 20; an electronic control device 24 with display unit 26; a control panel 28; an applicator wheel 30; a spinner roll 32; and a glue tank 34 are mounted on frame 2.
• Electric motor 18 is housed horizontally above frame 2, inside a motor housing 36 provided with an air vent 38; the rotary motion can be transferred by way of the motor's output shaft to transmission unit 20.
• the motor is electrically connected to electronic control device 24, which is installed inside a housing next to motor housing 36. Electric motor 18 is supplied with voltage from the outside by this controller, which can also control the rpm's of the motor.
• Display unit 26, which is connected electrically to the controller and which is installed in one of the ends of the housing of electronic controller 24 (see is in the form of one or more digital displays, and control panel 28 are Figure 1 ).
• glue tank 34 which is open at the top
• applicator wheel 30, and spinner roll 32 are installed at the end of frame 2, opposite electronic control device 4 and electric motor
• Applicator wheel 30 and spinner roll 32 are mounted cantilever fashion inside transmission unit 20 so that they can rotate around a horizontal axis (see Figure 6) and are driven by the transmission.
• the peripheral surfaces of applicator wheel 30 and spinner roll 32 can have surfaces of especially high quality, such as the surface which can be produced by plasma coating.
• the two end surfaces of applicator wheel 30 have an outward-curving, conical form.
• Glue tank 34 is partially filled with adhesive, and the lower part of applicator wheel 30 is immersed in the adhesive. Above the surface of the glue, but projecting partially into glue tank 34, there is a main doctor blade 40 (see Figures 3 and 4), which is mounted directly next to the peripheral surface of applicator wheel 30.
• doctor blade 40 is set up at an angle of about 45 * to the horizontal and can be moved by means of a pneumatically actuated piston in such a way that the width of the gap formed between main doctor blade 40 and applicator wheel 30 can be varied.
• Another doctor blade 42 is mounted between applicator wheel 30 and spinner roll 32 to wipe
• doctor blade 44 is mounted behind spinner roll 32, i.e., "behind" with respect to the direction in which the workpieces to be glued are moving. Doctor blades 42, 44 are also adjustable.
• Doctor blades 40, 42, 44 are mounted, jointly with transmission unit 20, to which applicator wheel 30 and spinner roll 32 are connected, on a separate frame 46, which in turn is attached by one of its sides 48 in a hinge-like manner to frame 2 in such a way that it can pivot; the entire frame 46 can thus be flipped upward by raising opposite side 50 of the frame and held in the up position by means of a latching bolt.
• frame 46 is in this flipped-up position, convenient access is provided to glue tank 34 and to doctor blades 40, 42, 44, so that they can, for example, be cleaned.
• Book blocks 54 are therefore (as shown in Figures 4 and 5) fed toward the applicator
• Glue tank 34 has an upper outside edge 62, which, in Figure 5, appears as a rectangle; an upper inside edge 64, situated farther inward and somewhat lower down, has slightly rounded corners 65.
• a nearly vertical forward end wall 66 of glue tank 34 continues into a bottom area, whereas, at the back end, a less steeply angled rear end wall 68 continues into the bottom area.
• a horizontal inlet hole 74 coming from outside of the glue tank, has its opening; a supply line (not shown) for introducing adhesive is connected to this inlet hole; the opening of this supply line has an elongated appearance, as shown in Figure 5.
• a doctor blade device 78 is built into the bottom 76 of glue tank 34 near the lower part of applicator wheel 30; this doctor blade device consists of a step 80, approximately at the lowermost point of the wheel's periphery and extending axially with respect to the wheel.
• This step is located between a first bottom section 82 of glue tank 34 relatively far away from the peripheral surface of the wheel and a
• a gap 86 is formed between applicator wheel 30 and second bottom section 84.
• the step has an approximate height of 1 -2 mm, and the distance between it and the peripheral ,surface of applicator wheel 30 is about 5/10 mm to 7/10 mm.
• Cap 86 ends at an edge 88 and is bounded on the sides by two walls 90.
• doctor blade device 78 drops down from edge 92 and continues toward the left as forward end wall 66.
• a kind of collecting basin 96 is recessed into bottom 76 near outlet hole 94.
• Side walls 90 are approximately horizontal at their highest point, starting from edge 88 and extending all the way to edge 98, and then they drop down in the rear area to bottom section 82, ending at a crease 100 in floor 76 of glue tank
• electric motor 18 makes use of
• gear wheel 106 there is a gear wheel 106, which meshes with a gear wheel 108 on applicator wheel shaft 1 10.
• Both applicator wheel 30 and spinner roll 32 are supported in cantilever fashion.
• wheel applicator device 1 is pushed into position near a bookbinding machine (not shown), so that applicator wheel 30 and spinner roll 32 are underneath the conveyors and guides (not shown)
• applicator wheel 30 and spinner roll 32 are adjusted in the vertical direction by turning hand crank 16 to raise or lower the frame.
• the conveyors and guides convey book blocks 54 to be glued forward at an adjustable speed; the blocks are aligned so that the length dimension of book spines 55 is per ⁇ pendicular to the axis of applicator wheel 30 and so that the spines
• spinner roll 32 which rotates in the direction opposite that of applicator wheel 30.
• the peripheral velocity of applicator wheel 30 is exactly the same as the transport speed of the book blocks, which is accomplished by the coupling of controller device 24 to an electrical signal transmitter with a sensor, the signal transmitter being mounted rigidly inside the bookbinding machine in such a way that its sensor can detect the motion of book blocks 54.
• a signal corresponding to the speed of book blocks 54 is available at the output of the signal transmitter for use by control device 24.
• the signal can be transmitted by the signal transmitter in a wireless manner or by means of a cable, which can be plugged into a jack in control device 24.
• the conveyors and guides of the bookbinding machine push book blocks 54 forward at a constant speed in such a way that spines 55 are in a horizontal plane 53.
• the two top apex lines 59, 61 of the peripheral surfaces of applicator wheel 30 and spinner roll 32 are
• spines 55 glued by applicator wheel 30 can be varied with the goal of
• the distance between spinner roll 32 and plane 53 and thus the distance between apex line 61 and plane 53 can be adjusted by the use of means (not shown) for a adjusting the height of spinner roll shaft 122, these means being provided inside transmission unit 20 and comprising, for example, pneumatic cylinders, the piston rods of which act on guide shoes, which are supported in such a way that they can slide vertically inside the housing wall.
• the bearings for spinner roll shaft 122 are installed in these shoes.
• the speed and direction of rotation of spinner roll 32 are coupled "rigidly" to the speed of applicator wheel 30, but it is also possible, of course, to provide an independent drive for spinner roll 32.
• Fresh adhesive is introduced at a metered flow rate into glue tank 34 through inlet hole 74 ( Figures 4 and 5) from an adhesive preparation device (not shown).
• a relatively large amount of the adhesive supplied to the tank is subjected inside the glue tank to the currents caused by the rotation of applicator wheel 30 and is thus conveyed toward a narrowing gap, formed between first bottom section 82 and a section of the peripheral surface of applicator wheel
• step 80 comprising part of doctor blade device 78, the adhesive arrives in gap 86 and is trans- ported through it.
• doctor blade device 78 By virtue of the special design of doctor blade device 78, most of the adhesive introduced into gap 86 passes directly through the gap and is carried from there, because of its adherence to the peripheral surface of applicator wheel 30, past main
• doctor blade 40 and onto book spines 55 to be glued By varying the distance between main doctor blade 40 and applicator wheel 30, it is possible to vary the thickness of the film of adhesive adhering to applicator wheel 30, this possibility being necessary so that the application of adhesive can be adapted to suit the interval between one book block 54 to be glued and the following block and also to suit the length of spine 55.
• Another sensor is provided for this, which signals the arrival of a book block above the forward area of the glue tank.
• the above-mentioned signal transmitter inside the bookbinding machine supplies a frequency signal, also mentioned above, which is proportional to the speed of the machine.
• This signal is also used as a distance signal for the control of main doctor blade 40. In this way, it is possible to apply glue intermittently to applicator wheel 30, which is preferred, this glue then being transferred to the spine of the book.
• Main doctor blade 40 opens and closes with each book passing by the
• electromagnetically driven pneumatic cylinder (not shown in the drawing for the sake of clarity) is used to move main doctor blade 40 in the direction indicated by arrow 41 .
• doctor blades 42, 44 also serve to wipe off excess adhesive from applicator wheel 30 and spinner roll 32, respectively.
• Step 80 of doctor blade device 78 is about 1 mm high, and a gap with a width of about 5/10-7/10 mm is formed between it and the applicator wheel.
• Applicator wheel 30, spinner roll 32, and glue tank 34 can be heated electrically or by means of a thermal transfer fluid, if the
• heating wires are provided in the walls of glue tank 34, close to the inside surface of the tank, and along and just inside the peripheral surfaces of applicator wheel 30 and spinner roll 32.
• the heating wires in glue tank 34 are supplied with current from an , electrical terminal 124, whereas the heating wires inside the applicator wheel are supplied by means of carbon brushes acting on shaft 1 10 of the applicator wheel.
• the heating wires are essentially replaced by channels.
• the temperatures of the heated parts can be regulated by means of a controller installed inside the control device. Protection against overheating can also be provided.
• Electric motor 18 is connected to a high-amperage line in a

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• 1993
  • 1993-03-26 DE DE9304504U patent/DE9304504U1/de not_active Expired - Lifetime
• 1994
  • 1994-03-25 EP EP94912319A patent/EP0696235B1/fr not_active Expired - Lifetime
  • 1994-03-25 JP JP6522228A patent/JPH08508445A/ja active Pending
  • 1994-03-25 AU AU64929/94A patent/AU6492994A/en not_active Abandoned
  • 1994-03-25 DE DE69412813T patent/DE69412813T2/de not_active Expired - Fee Related
  • 1994-03-25 CA CA002157122A patent/CA2157122A1/fr not_active Abandoned
  • 1994-03-25 WO PCT/US1994/003297 patent/WO1994022593A1/fr active IP Right Grant

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