Title:
Adhesive applying mechanism for paper package making machines
United States Patent 2082186
Abstract:
This invention relates to adhesive applying devices and has among its objects to provide a mechanism which is capable of transferring adhesive from a supply reservoir which is below the material being fed, either to a top or to a bottom surface of the material. It has heretofore been the practice...


Inventors:
Staude, Edwin G.
Application Number:
US69578333A
Publication Date:
06/01/1937
Filing Date:
10/30/1933
Assignee:
Staude, Edwin G.
Primary Class:
International Classes:
B31B1/62
View Patent Images:
Description:

This invention relates to adhesive applying devices and has among its objects to provide a mechanism which is capable of transferring adhesive from a supply reservoir which is below the material being fed, either to a top or to a bottom surface of the material.

It has heretofore been the practice to use two mechanisms, one for applying glue to the bottom of a blank and another for applying glue to the top. In that type of glue applying mechanism which applies the glue to the top, it is necessary to place the adhesive reservoir above the work line, and with such a mechanism surplus glue is frequently accidentally deposited on the work and on the working parts of the machine. The disadvantages of this type of mechanism are that during that interval when no blank is engaged by the glue applying wheel, the glue accumulates on the surface of the wheel and drips onto the mechanism below. Moreover, the glue becomes caked, and dries on the side of the glue applying wheel so that frequent washing and cleaning is necessary. There is no provision for returning the surplus adhesive, and loss of adhesive along with frequent cleaning requirements are, therefore expensive items of operation.

Objects are, therefore, to do away with overhead mechanism and to provide a very simple mechanism using only a single wheel for transferring adhesive from a reservoir below the work line, either to the top surface or to the bottom surface of any material; to use a circular wheel or disk and to overlappingly associate a flat face of the disk with a marginal area of the material, so that the edge of the material is related to the periphery of the disk as a chord and therefore so that during rotation, diagonal wiping action results respectively as the glue applying surface approaches and as it leaves the area of application of the glue; to provide a disk rotating on an axis which is at an angle to the feeding plane and which slants downwardly and inwardly to a point below the feeding means, and dips into the adhesive supply; and to have the rotative axis of the disk substantially entirely above the reservoir or extending from above downwardly and only a little way into the reservoir.

Objects, features and advantages of the invention will be set forth in the description of the drawings forming a part of this application, and in said drawings ' Figure 1 is an elevation partly in vertical section of an embodiment of the invention for applyir, adhesive to the upper surface of any suitable material; Figure 2 is a plan section illustrating the relation of the glue applying disk to the adhesive supply reservoir and to the upper surface of the glue flap of a paper box blank, the cover for the reservoir having been removed; Figure 3 is a vertical section on line 3-3 of Figure 2 taken through the gluing wheel shaft and feed mechanism; Figure 4 is a vertical section through the glue pot taken on line 4-4 of Figure 3; Figure 5 is a perspective view showing how the flap is pre-bent along its fold line and guided to the under side of the glue applying wheel; Figure 6 shows one form of box blank having side flaps including a glue flap and showing the flap folded into the first completed operation of what is known as a double wall box; Figure 7 is a detail vertical section on line 7-7 of Figure 2 showing the scraper for the adhesive applying wheel; Figure 8 is a detail vertical section showing the manner of applying adhesive to the under side of a blank, and also showing the scraper, the section being on a line corresponding to that of Figure 3; and Figure 9 is a plan view of an ordinary carton or folding box to which adhesive has been applied on the under side by the mechanism of Figure 8.

Referring first to Figure 3; Numeral 57 indicates a shaft arranged laterally of the feeding means and so placed that its axis slants downwardly and inwardly to some point below the feeding means. Operated by the shaft is a wheel or disk 59 arranged in a plane perpendicular thereto. The shaft has keyed or otherwise secured to its lower end, a sleeve-hub 58, and to the hub is secured the wheel 59. The wheel is beveled to provide a flat circumferential surface 60 adapted for applying adhesive to the under side of a blank, and this beveled surface is at such an angle to the flat faces of the disk that when in adhesive applying position it lies substantially in a horizontal plane or in a plane parallel with the face of the blank to which it is to apply adhesive, see Figure 8. If, as in the present case, the axis of rotation of the wheel is at an angle of forty-five degrees with the horizontal, then the beveled surface 60 is at an angle of forty-five degrees with the flat face of the disk. This surface 60 is relatively narrow. The opposite face of the disk has a flange 61, the bottom surface of which acts to supply adhesive to the upper side of a passing blank in the manner sho' n in Figure 3. The disk 59 is preferably detachably secured to the hub 58 by means such as screws 62. It is desirable to have. the disk separable from the hub inasmuch as it is frequently necessary to use an expensive special acid-resisting metal in its construction, of which metal the hub need not be made.

Referring particularly to Figure 8: The folder frame is indicated at 10, and attached thereto is the supporting roller II for the carrier belt 12.

The work 39 is of course carried on and moved by the belt 12 and a top-pressure carrier 16, having ball bearing rollers I5, acts to press the work 39 against the belt.

Referring to Figure 3: The shaft 5B is mounted in a bearing 63 which is above the level of the top of the adhesive receptacle and the shaft is provided at its top with a spiral gear 64 which meshes with a spiral gear 65 on a shaft 66, supported by a bearing 67. Keyed to the shaft is a sprocket wheel 68 by which the shaft 66 is driven; see also Figure 1.

The lower end of the disk is immersed in the adhesive 5. The special adhesive reservoir 69 sets in a water bath of a reservoir 70, the water being heated either by steam or electrically. If electric means is used, the heater unit is inserted in opening, see Figure 3, now closed by the plug 71.

Figure 3 shows how the present mechanism is used for applying adhesive to the upper side of the glue flap of a box blank. For this purpose, the flap is pre-bent along its fold line, in this instance depressed, and is guided to adhesive receiving position against the under side of the flange 61. A small flap wheel 72 is mounted on arm 13 which arm is attached to the side of the water bath receptacle 70. The wheel acts to hold the flap in adhesive receiving position.

The wheel is grooved and is so related to the flange 61 as not to engage it when the material is not passing between it and the flange, and thus no adhesive is transferred to it, to be in turn transferred to the under surface of the flap. In order to regulate the amount of adhesive on surfaces 60 and 61 of the disk 59, there is provided a suitable glue scraper 74, see Figures 1, 2, 3, 4, 7. The adjustment of the scraper 74 is made by means of a rock shaft 76, see Figures 2 and 4, and the controlling adjustment 76. In order that the glue scraper 74 may have a lateral as well as a longitudinal adjustment, that is a diagonal adjustment, there are provided inclined slots 77, see Figure 2, traversed by cap screws 78. By this means, the amount of glue on the faces 60-I1 of the adhesive applying disk 59 can be regulated. A splash guard 79 covers the adhesive receptacle adjacent the glue scraper, and the element 80 covers the remaining part of the receptacle, see Figures 3 and 4.

A suitable deflecting guide plate 81 is provided for deflecting or pre-bending the flap 40 of the blank 39 to guide the same to adhesive receiving relation with surface 61. Where the adhesive is to be applied to the under surface of the blank, see Figure 8 a flap wheel 82 is provided to hold the blank in contact with the surface 60 of the disk. The guide 81 may be mounte. in any suitable manner. In Figure 5, I have shown a post 83 secured in clamp 84 by set screw 85, the clamp 84 being in turn clamped by a cap screw 86 to a cross shaft 87, which shaft is part of the folding machine.

The sprocket 68, see Figure 1, is driven by a chain 88 running over a sprocket 89 on shaft 90, which shaft 90 is one of the feeding shafts of the folding machine and is in geared relation to shaft 91. These shafts operate the feeding means by which the blanks are advanced through the machine.

The water reservoir 10 is of course secured to the frame of the machine 3, the same as reservoir 2. It may be easily and quickly removed for cleaning purposes. The reservoir 69 and reservoir 70 are secured to each other by suitable cap screws 92 which when securely tightened rigidly hold the member 69 to the member 10.

This mechanism is well adapted for use with paper package making machines and a feature of the invention is the use of an element like 81 of Figure 5 for pre-breaking or pre-bending the fold line of the glue flap, at the same time bringing it into adhesive receiving relationship with the disk, as shown in Figures 3 and 5.

Another feature relates to the modification of the opposite flat faces of the disk to provide on each face a circumferential adhesive applying surface, and to so form and dispose these surfaces that one may act to apply adhesive to the under side of the material, as shown in Figure 8, or may act to apply adhesive to the upper side of the material as shown in Figure 3. It is noted that, in this embodiment, the beveled adhesive applying surface 60 is at such an angle that when in adhesive applying position it lies substantially in a horizontal plane.

Of course, the angle of the axis of the wheel may be changed to adapt it for applying adhesive to a surface which is not horizontal. In such a case, the angle of the bevel relative to the flat face of the disk would be correspondingly changed.

Another feature is the use of a grooved wheel cooperating with the adhesive transfer flange 61 as shown, and so to speak in straddling relation thereto so that when material is not passing between the grooved wheel and the flange, no glue will be transferred to said wheel I claim as my invention: 1. An adhesive applying mechanism for paper package making machines, including means for feeding material, an adhesive reservoir located below the feeding plane, and a single rotative means dipping into adhesive in the reservoir and having two adhesive-applying surfaces adapted to be alternatively engaged respectively by opposite sides of the material, and means for guiding the material to obtain such alternative engagements.

2. An adhesive applying mechanism comprisin;- means for feeding material, an adhesive reservoir, a cylindrical disk rotative on an axis at an angle to the feeding plane, and dipping into adhesive in the reservoir and having each opposite flat face of greatest area modified to provide two circumferential adhesive transfer surfaces, and means for alternatively directing opposite sides of the material fed by said feeding means into adhesive-receiving relation with one or the other of said transfer surfaces. 3. An adhesive applying mechanism comprising means for feeding box blanks, an adhesive reservoir below the feeding plane, a cylindrical disk dipping into adhesive of the reservoir and rotative on an axis which slants downwardly and inwardly to the feeding means and having on one of its flat faces of greatest area a circumferential flange providing a glue transfer surface, means for deflecting the glue flap of a blank moved by the feeding means to pre-break Its fold 75.

line and bring the flap to adhesive receiving relation with said transfer surface, and a grooved wheel substantially in straddling relation to said flange for limiting the degree of deflection and for supporting said portion in adhesive receiving position during transfer of adhesive.

4. An adhesive applying mechanism comprising means for feeding material in a horizontal plane, a disk dipping into adhesive of the reservoir and rotative onan axis which lies in a vertical plane perpendicular to the direction of feed, said axis being slanted downwardly and inwardly toward a point below the feed line, the opposite flat faces of said disk being in a plane perpendicular to the axis and each face being modified one to provide a circumferential adhesive applying surface parallel with the plane of rotation, and the other to provide a beveled surface arranged at an angle such that when in adhesive applying position it lies substantially in a horizontal plane, and means cooperable with material moved by the feeding means for bringing it to and holding it in adhesive receiving relation with either adhesive applying surface of said disk.

5. A dual purpose adhesive applying mechanism including means for feeding material, an adhesive supply receptacle and a rotatively mounted adhesive transfer element operatively associated therewith and having two ring-like flat peripheral adhesive transfer surfaces facing away from one another and adapted to be brought into adhesive-transfer relation with either of two opposite sides of the material moved by said feeding means, and means for guiding said material to cause either of said opposite sides to assume adhesive relation with said transfer surfaces.

6. A dual purpose adhesive applying mecnanism including means for feeding material, an adhesive supply receptacle, and a rotatively mounted adhesive transfer element having two ring-like flat peripheral adhesive transfer surfaces facing away from one another and adapted to be brought into adhesive transfer relation with either the upper or with the lower face of material moved by said feeding means, and means adjust-. able for holding the material in adhesive-receiving relationship to either of said transfer surfaces.

7. A rotatably mounted adhesive transfer disk providing a cylindrical surface and two oppositely facing flat faces, one of said flat faces providing a narrow flat adhesive transfer surface parallel to the plane of rotation of the disk, the disk being beveled to provide a narrow flat adhesive transfer surface which intersects said cylindrical surface and the opposite face of the disk.

8. A dual purpose adhesive applying mechanism including means for feeding material, a rotatable adhesive transfer element having two non-parallel adhesive transfer surfaces, and means for guiding said material against either one of the two adhesive-transfer surfaces to obtain either under or upper adhesive application to said material.

9. A dual purpose adhesive applying mechanism including means for feeding material, a rotatable adhesive transfer element having two adhesive transfer surfaces, one parallel with the plane of rotation and the other at an angle thereto and facing away from the first, said transfer element being so related to the feeding means that the upper face of work on said feeding means can be brought into adhesive transfer relation with said first mentioned surface, and so that the under surface of work on said feeding means can be brought into adhesive applying relation with the last mentioned'surface.

10. A dual purpose adhesive applying mechanism including means for feeding material and a single adhesive applying member having two adjacently disposed non-parallel adhesive applying surfaces adapted to be alternatively engaged respectively by opposite sides of the material, and means for guiding the material to obtain such alternative engagements. 11. An adhesive-applying mechanism including means for feeding material so that a marginal portion of the material projects beyond the feeding mechanism at one side, an adhesive reservoir, a single rotative means dipping into the reservoir and having two adhesive-applying surfaces so located that the projecting portion of the material can beengaged with either surface, and means for controlling the projecting portion of the fed material to alternatively bring one side thereof 15 into adhesive transfer relation with one of the surfaces, or bring the opposite side of said portion into adhesive transfer relation with the other surface.

EDWIN G. STAUDE.