Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Patent
1996-12-10
1998-12-01
Engel, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
118244, 118258, B05C 100
Patent
active
058432736
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a device for applying a liquid adhesive to an object conveyed past it, consisting of an adhesive-containing trough, on which an application roller that partially submerges into the adhesive is installed such that it rotates around a horizontal axis.
Such devices are known, among other things, for the labeling of objects or for the adhesive-bonding technique in the manufacture of adhesive-bonded book blocks or books, booklets, etc.
The drive for the application roller or rollers is by means of a shaft that is fitted through the walls of the adhesive trough, on which the application roller runs on bearings. The adhesives, which in part are chemically aggressive, along with the alternate warming and cooling of the adhesives stress the bearing seals for the application roller that are installed below the surface of the adhesive and result in a leaky trough after a certain period of use.
From European Patent Document EP-A-0 587 026, we are familiar with a gluing mechanism for adhesive-bonding machines, for which one half of the magnetic coupling consisting of two disks is located on the drive shaft outside of the gluing trough, while the other half is located on the application roller that is positioned inside the gluing mechanism. Both magnetic coupling halves are positioned coaxially on both sides of a trough wall and face each other. The frontal surfaces of the magnetic coupling halves that face each other are magnetized.
SUMMARY OF THE INVENTION
It is thus the object of the invention to create a device of the aforementioned type, for which the leakiness of the trough is corrected and the relating maintenance is not necessary.
The solution according to the invention is that the trough holds the stator for the application roller that is designed as the rotor of an electric motor.
Alternating current or direct current motors with a magnetic rotor, electric motors with short-circuit rotor, motors with eddy current rotors, stepping motors, magnetic resistance motors or other motors that generate a rotational field can be used as electric motors.
Either internal or external rotor type motors are suitable for the device according to the invention.
The symmetrical design of an electric motor prevents forces that are effective on a single side only.
In the following, the invention is explained in more detail with the aid of various embodiments and by referring to the drawing, to which reference is made for all details not mentioned expressly in the description.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross section through the device according to line I.div.I in FIG. 2.
FIG. 2 is a cut through the device at Line II.div.II in FIG. 3.
FIG. 3 is a cut through the device according at line III.div.III in FIG. 2.
FIG. 4 is a view from above of an alternate embodiment of the device.
FIG. 5 is a view from above of another alternate embodiment of the device.
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 and 2 show a device 1 for applying a liquid adhesive 3 contained in a trough 2. Boreholes 8 for supporting an application roller 7 are provided in the trough 2, which holds a stator 4 of the application roller 7 that is designed as a rotor 16 of an electric motor 6, wherein the exemplary embodiment shown has an additional bearing block 9 for a dual support of the application roller 7, which could also be positioned cantilevered in a wall 10 of the trough 2. The stator 4 of the electric motor 6 is provided on both sides of the rotor 16 and is mounted on the one hand in the wall 10 of the trough 2 and, on the other hand, in the rib-like bearing block 9.
The stator 4 that generates a rotating field also has an iron core 12 surrounded by an electric field winding 11--see FIG. 3--that consists of two ring-shaped segments and is arranged stationary next to the rotor 16. Through the magnetic rotating field generated by the stator 4 under the effects of electric energy, the rotor 16 starts rotating as a result of the permanent magnets 5, arranged along its circumferenc
REFERENCES:
patent: 4117800 (1978-10-01), Maus et al.
patent: 4964367 (1990-10-01), Belter
Engel James
Grapha-Holding AG
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