US2068087A - Adhesive applying mechanism for paper package making machines - Google Patents

Description

Jan. 19, 1937.

E. G. STAUDE 2,068,087

ADHESIVE APPLYING MECHANISM FOR PAPER PACKAGE MAKING MACHINES Filed Oct. 28, 1933 4 3 Sheets-Sheet l work F 2 fnvenio r 521 572 G Jtaade Zorneys Jan. 19, 1937. E. e. STAUDE 2,063,087 ADHESIVE APPLYING MECHANISM FOR PAPER PACKAGE MAKING MACHINES Filed Oct. 28, 1935 3 Sheets-Sheet 2 szallde ZZOr-nev Av Sv Q Jan. 19, 1937. STAUDE ADHESIVE APPLYING MECHANISM FOR PAPER PACKAGE MAKING MACHINES Filed Oct. 28, 1955 s' Sheets-Sheet s Alto Patented Jan. 19, 1937 UNITED STATES PATENT OFFICE ADHESIVE APPLYING MECHANISM FOR PAPER PACKAGE MAKING MACHINES 15 Claims.

This invention relates to adhesive applying devices, and has among its objects to provide a mechanism which is capable of transferring adhesive from an adhesive supply reservoir which is below the line of feed, to the top surface of a material which is being fed by any suitable feeding mechanism.

In my Patent No. 1,127,538 is shown a type"- of adhesive transfer mechanism, in which an adhesive transfer disk rotating on a horizontal axis is adapted to apply adhesive to the under surface of the material carried by the feeding means. In the device of this patent, the material to which adhesive is to be applied passes over the top of an adhesive applying wheel which is partly immersed in the adhesive. The material of the disclosure of this patent is a blank, which makes up into what is known as a carton or folding box, having a long single side seam. The glue applying wheel or disk is supplied with a suitable scraper to remove any surplus adhesive and return it to the reservoir. In this way, an even flow of adhesive to the material is obtained. The construction of this.

paitent is very satisfactory for applying adhesive to the under side of a blank. However, in the manufacture of a large number of paper packages it is necessary that the adhesive be applied on the upper side of the blank and in the past it has been the practice to use adhesive applying mechanisms similar to that shown in my Patent No. 1,193,628 in which the glue supply reservoir is arranged above the work line, that is above the level of feed. The disadvantages of this type of mechanism are: that after a blank has passed the glue applying wheel, the glue accumulates on the surface of the wheel and drips onto the mechanism below or becomes caked and dries on the side of the glue applying wheel, so that frequent washing and cleaning of the wheel is required. Due to the fact that in this type of device all of the transfer wheels are exposed to the atmosphere, with-no provision for returning the surplus adhesive to the glue pot, there is considerable loss of adhesive by evaporation, etc., which substantially increases the expense of operation.

Important objects of this invention are: to provide an attachment which may be quickly applied to a mechanism like that shown in my patent above mentioned, for transferring the adhesive from below the work line to a point above the work line and applying it to the upper side of the material at the proper point; to provide a mechanism which will cause all surplus adhesive, transferred to the wheels but not transferred to the material, to be returned to the main reservoir; to provide a simple compact unit, which can be quickly attached to existing adhesive-applying mechanisms which apply glue to the under side of the work; to provide a type of transfer wheel in which the glue is applied to the material by a wiping action and by a fiat surface which is substantially parallel with the face portion of the material to which the adhesive is applied; to apply the adhesive by means of a peripheral portion of the under surface or face of the transfer wheel (as distinguished from its cylindrical face or edge) so that diagonal wiping actions respectively as the glue applying surface approaches and as it leaves the area of application of the glue, are obtained; to provide means for guiding the material to avoid accidental engagement thereof with the transfer wheel; and to provide means arranged to press the material against or to.

adjust it relative to the transfer surface of the transfer wheel.

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 a plan view showing my invention applied to a type of mechanism for applying adhesive to the under side of the blank;

Figure 2 is a longitudinal section on line 2-2 of Figure 1 looking toward the adhesive transfer disks;

Figure 3 is a transverse section on line 3--3 of Figure 1, the section being also transverse of the box folding machine to which my invention is applied;

Figure 4 is a vertical section on line 4- -4 of Figure 3 cutting through the material or box blank; 4

Figure 5 is a detail perspective showing my improved mechanism, and illustrating the wheel for holding the blank or material in contact with the transfer wheel, and showing thedeflector shoe for preventing accidental engagement of the blank with the edgeof the transfer wheel;

Figure 6 is a large detail view of the disks or wheels viewed as in Figure 2, illustrating'how surplus adhesive is removed and returned to the reservoir; and

Figure? is a plan view of a conventional type of double wall box blank in which two side seams are folded over and glued down.

In the drawings, see Figures 2 and 3, numeral 2 indicates the adhesive reservoir. This. reservoir or glue pot is mounted on base 3 and is adapted for sliding movement transversely of the blank folding and feeding machine. Within the reservoir 2 is a glue wheel 4 which has the form of .a thin disk and which rotates on a horizontal axis in direction of the arrow. The direction of rotation of the top of this wheel 4 is the same as the direction of feed, see Figure 5. Numeral 6 indicates the conventional type of glue scraper for regulating the depth of the layer of adhesive on the edge of the wheel 4 and is controlled by a suitable adjusting screw I.

The glue wheel 4 is splined to shaft 8, in this instance from the right hand side of the machine and this shaft passes through an opening 9 of the right hand folder frame I0 and is operated by a suitable drive and is mounted in bearings l3 of the reservoir 2. The folder frame III has a series of rollers H for supporting a carrier belt l2 upon which the blank or material 39 is delivered. The blank is held in contact with the belt l2 by a pressure. belt I4 which, in turn, is held in contact with the blank by a series of pressure rolls l5, see Figure 2. These rollers I5 are mounted in a carriage I6. Considering the broader aspects of this invention, any preferred form of material feeding means may be employed. The mechanism thus far described is adapted for applying adhesive to the under side of the material, it being understood that this is accomplished by means of the wheel 4 when the glue pot and wheel have been slid along the shaft 8, see Figure 3, toward the right to bring the upper portion of the periphery of the wheel 4 beneath and in transfer relation with the blank 39. a

To provide means for transferring adhesive -to the upper side of the blank 39, see Figure 3, I provide a mechanism which can be attached and detached, and which includes a bracket ll attached as at [8 to the reservoir 2. At the upper or free end of the bracket, a stud I9 is mounted which serves as a bearing, for sleeve 20 having at its lower end a miter gear 2| meshing with miter gear 22 keyed as at 23 to shaft 8. The stud has a suitable head 24 against which the lower end of the sleeve 20 or gear 2| bears.

The transfer wheel 25 is provided with a sleeve hub 26 which is mounted on the sleeve 20. The hub 26 is keyed to the sleeve 20 to rotate therewith, by means of a sliding key 21 secured by screw 28 to the hub 26. The hub 26 is thus adapted to slide vertically to correspondingly adjust the adhesive transfer surface of wheel 25, relatively to the corresponding face of wheel 4. The glue transfer wheel 25 is provided on its lower side with a depending peripheral flange 30, the bottom flat face of which flange is adapted to receive adhesive from the cylindrical surface or edge of the glue supply wheel 4, and apply it by a circular wiping action to a surface of the material which is parallel with the flat bottom face of the flange.

It is noted thatthe .under flat surface of this flange 30 is the surface to which glue is supplied and is also the surface which applies the glue to the material. Only a relatively small arc of this under surface engages the work in the manner shown in Figure l. The working face of the flange overlaps the material and the degree of overlap can be varied by sliding the entire assembly toward or away from the feed belt. The arrangement is such that a wiping action is obtained from a flat surface against the' correspondingly flat surface of the material, these two surfaces being substantially parallel, and in this case, horizontal. The elements as thus related in the zone of application of adhesive, cause the supplying surface to move diagonally toward the surface of the material, then-in the same direction as the material, and then diagonally away from the material.

To adjust the spacing between the bottom surface of the flange 30, and the cylindrical edge of the wheel 4, collar .3! is slidable on stud l9.

The stud is provided with a diametrically arranged longitudinally extending slot 32 through which a pin 33 passes, said pin also passing through openings in collar 3|. The lower face of the collar'3l and the upper face of the hub 26 are engaged as shown, and a set screw 34 in threaded engagement with the stud l9 entering the slot 32, engages the pin 33. The stud I9 is shouldered as at 36, and the shoulder abuts the under surface of the arm I1. The stud is secured against axial motion by means of nut 31 threaded thereon. A spring 38 surrounding the sleeve 20 bears against the top of the gear 2| and the bottom. of the transfer wheel 25 to constantly hold the hub 26 of the wheel against the under side of the collar 3|. Therefore, by adjusting the thumb screw 34, the collar 3| and therefore the hub 26, and flange 30 can be raised or lowered.

To preventaccidental engagement of the fed material with the disk 25 and to cause the material to assume the proper adhesive transfer relation with the under surface of the flange 30, there is provided a shoe 4|, see Figures 4 and 5, mounted on an adjustable member 42 secured by a cap screw 43 to bracket IT. The adjustable member 42 has a slot 44 adapting it for vertical adjustment to depress the glue flap 40 so as to clear the forward edge 45 of the flange of the transfer wheel 25. v

Referring to Figure 5: In order that contact between the transfer wheel 25 and the glue flap 40 may be made at the center, in this case at a point diametrically opposite the point of transfer of adhesive by wheel 4 to flange 30, there is provided a grooved flap wheel 46, see Figure 4, mounted on a lever 41 pivoted at 48 to a plate in turn secured to arm I1. One arm 49 of the lever is abuttingly engaged by set screw 50. A spring holds the arm 49 against the lower end of the set screw 50, and the screw is threaded as at 52 to permit micrometer adjustment of the lever and therefore the wheel 46 so that the glue flap or material will just come in contact with the lower surface of the flange 30. The flap wheel 46, see Figure 3, is formed of two axially spaced disks to provide a circumferential groove 53, the disks lying in planes laterally at opposite sides of and being spaced from the corresponding vertical surfaces of the flange 30, so as not to come in contact with the flange 30 when no material is passing between the flange and the wheel, and therefore so that no adhesive on the flange 30 will be transferred to the wheel 46.

The'material as it approaches the adhesive applying zone is first depressed by the element 4! to avoid accidental engagement of the forward edge of the blank, for example with the wheel 45, and then a wheel is arranged to guide the flap of such a blank upwardly. The result is that the flap travels upwardly to meet the under Surface of the depending flange of the transfer wheel. Thus, as can be seen in Figure 75 scraper 4, the upper surface of the flap or blank makes an acute angle with the oncoming lower surface of the depending flange of the transfer wheel. The advancing wiping action begins in opposition to or on this upwardly inclined surface of the blank. Afterward the glue-applying surface moves laterally and diagonally away therefrom in a manner corresponding to its advancing movement.

In Figure 5, the shaded portion 54 indicates the, area of application of the adhesive, and it is to be again noted that there is a wiping action during application of adhesive which insures its perfect application clear to the edge of .the stock or material. If, however, it is desired not to apply the adhesive clear to the edge of the stock, then the stock may be deflected to hold some predetermined marginal portion away from the transfer surface 30 so that adhesive will not be applied thereto. Referring to Figure 1, it is seen that this arrangement is possible because the flat glue applying surface of the flange 30 overlaps, see also Figure 3, the material, that is the outer edge of the material extends inwardly beyond the inner face of the flange 30 to'be supported by the innermost disk of the wheel 46. This control can be accomplished by any suitable devices, not shown. It is evident because of the wiping relation of the wheel, that the degree of overlap of the wheel with the material can be as desired, because of the ability to adjust the whole system toward and away from the material along the shaft 8.

Figure 6 shows diagrammatically the manner in which the wheel 4 cleans the surplus adhesive from the adhesive applying. surface of the flange 30, the relation of the adhesive at this point being shown by lines 55. These lines indicate removal of the adhesive and show that the wheel 4 carries the removed or surplus adhesive into the reservoir 2, thus preventing accumulation and dripping of adhesive from the flange 30 as it travels from the wheel 4 toward point of its application to the material.

The spacing between 'the wheel 4 and the 6 of course determines the amount of adhesive delivered by the edge of the wheelv 4 to the under surface of the flange 30. The wheel 25 is adjusted to come into contact with the layer of adhesive, the thickness of which is regulated by the scraper. Since this wheel 25 revolves in a direction opposite to that of the wheel 4, it takes on a smooth continuous even flow of adhesive which is in turn transferred to the material, such as the glue flap of a carton blank, without any danger of glue accumulating during that time when blanks are not fed, notwithstanding that during such time the glueapplying mechanism is still operating. In Figure 7, the blank is shown with the glue flap 40 folded over as at 56.

This mechanism for applying adhesive to the upper side of the material is particularly well adapted for hot glue. Hot glue is frequently very desirable to use because of its quick setting properties, but its use is entirely impractical on adhesive applying mechanism of the type shown in my Patent No. 1,193,626 because hot glue when exposed to the air cools and cakes so that in a short time the machine must be shut down,

and the glue applying device washed with hot water. This is unnecessary with the present device for the reason that the hot glue has very little time to cool and become stilf and stringy, because it travels such a short distance on the transfer wheel and moreover, the transfer surface of flange 30 is so set as to practically contact the corresponding transfer surface of the wheel 4, and such adhesive as is not used is immediately removed from the flange and re-deposited in the glue reservoir. Therefore, this glue does not have time to cool and become stiff and stringy.

To be certain that the partially cooled hot glue will not remain on the surface of the rapidly revolving wheel 4, even though it revolves in the hot glue, I provide a scraper 51 submerged in theglue supply and adjusted to just contact the edge of the wheel 4 and remove partly cooled glue so that it may heat up gradually with the other adhesive in the reservoir, and thus keep the surface of the wheel 4' smooth, so that it will only pick up fresh hot glue to apply to the transfer wheel. The glue that is removed from the flange 30 and transferred into the heated glue in the reservoir is then, of course, re-heated and used again. This is utterly impossible with the conventional over-head transfer type of glue applying mechanism wherein the surplus adhesive usually drips upon the work, below. In fact, the use of hot glue is impractical and not often attempted with the present types of overhead gluing mechanisms. 7

It is noted that by the practice of the present invention, a single glue pot and an under glue applying mechanism can be adapted for both under and over gluing by an attachment including the horizontal wheel 25 having the glue contact flange 30. This construction entirely dispenses with.- the need for separate adhesiveapplying mechanisms for over-head work, with which gluing machines of the under-gluing type are now generally supplied, to adapt them for gluing various types of blanks, and for applying glue either on the top or on the bottom of the blank.

I claim as my invention:

1. An adhesive applying mechanism comprising means for feeding material, an adhesive applying disk rotative in a plane substantially parallel to the face of the material and arranged to have a portion of one face which is parallel with the face of the material assume adhesive transfer relation with the material, a glue supply disk in transfer relation with the adhesive applying portion of said applying disk, means for driving the disks so that the applying periphery of the applying disk moves generally in the same direction as the material at the point of application of adhesive, and so that the disks move in opposite direction at point of transfer of adhesive from the supply to the adhesive-applying disk, and means adjustable for directing that portion of the material which is to receive adhesive, into adhesive-receiving relation to the adhesive-applying surface of the adhesive-applying disk.

2. A device of the class described comprising means for feeding material, an adhesive applying disk rotative in a plane substantially parallel to the face of the material and adapted to apply adhesive by a portion 'which is substantially perpendicular to its axis of rotation, a glue supply disk in transfer relation with the adhesive applying portion of the adhesive applying disk, and means for driving the disks, means for adjusting the glue applying wheel in direcwhich adhesive is to be applied to and hold it in adhesive applying position.

3. A device of the class described comprising means for feeding material, a glue supply disk rotative on a horizontal axis, and dipping into an adhesive supply a transfer disk rotative on a verticalaxis and having one face cooperating with one edge of the supply disk to receive adhesive therefrom and having the same face in adhesive transfer relation to the face of the material, means adjustable to guide the material to adhesive-receiving relation with the transfer face of the transfer disk at a point diametrically opposite the adhesive transfer point of thedisks, and means for driving the disks.

4. In a device of the class described means for feeding material, a glue pot having a glue supply wheel operatively associated therewith and driving means for the wheel, means by which the pot and wheel can be adjusted toward and away from the feeding means to bring the wheel in position to apply glue to the bottom of the material carried by the feeding means without disturbing the driving relation of the driving means, a transfer wheel detachably rotatably mounted and arranged to receive glue from the supply wheel when said supply wheel is in nonglueapplying position and apply it to the top of the material, and means for driving the second wheel.

5. In a device of the class described means for feeding material, a glue pot having-a glue supply wheel operatively associated therewith, and driving means for the wheel including a shaft, means by which the pot and Wheel can be adjusted along the shaft toward and away from the feeding means to bring the wheel in position to apply glue to the bottom of material carried by the feeding means, without disturbing the driving relation of the driving means, a transfer wheel andmeans detachably mounting it in a position to receive glue from the supply wheel when said supply wheel is in non-glueapplying position and apply it to the top of the material, and means for driving the transfer wheel from the shaft of the driving means of the supply wheel at a point between the pot and the feeding means, said driving means being detachable with mounting means for the transfer wheel.

6. In a device of the class described means for feeding material, a glue pot having a glue supply wheel operatively associated therewith, and driving means for the wheel, means by which the pot and wheel can be adjusted toward and away from the feeding means to bring the wheel in position to apply glue to the bottom of the material carried by the feeding means, without disturbing the driving relation of the driving means, a transfer wheel and means detachably mounting it in a position to receive glue from the supply wheel when said supply wheel is in nonglue-applying position and apply it to the top of the material, and means for driving the trans fer wheel from the driving means of the supply wheel, said driving means being detachable with mounting means of the transfer wheel.

'7. In a device of the class described means for feeding material, a glue pot having a glue supply wheel operatively associated therewith, and driving means for the wheel, means by which the pot and wheel can be adjusted to bring the wheel in position to apply glue to the bottom of the material carried by the feeding means, without disturbing the driving relation of the driving means, a transfer wheel and means detachably mounting it in a. position to receive glue from the supp wheel when said supply wheel is in non-glue-applying position and apply it to the top of the material, and means for driving the transfer wheel.

8. An adhesive applying mechanism. having means for feeding material to which adhesive is to be applied, an adhesive reservoir, a first wheel partly submerged in the, adhesive of the reservoir and so arranged that the uppermost portion of its periphery is substantially on the level with the work line, means revolving the wheel so that its top travels in direction of travel of the feeding means and material thereon, an adhesive transfer wheel revolving on an axis substantially perpendicular to the plane of the work, and its lower face in adhesive transfer relation with the .first wheel, and with that same face in adhesive transfer relation with the face of the material to which the adhesive is to be applied, means for rotating this wheel in a direction opposite to the first wheel at point of adhesive transfer, a deflector for guiding the material beneath the second wheel and a flap wheel for holding the material against the second wheel, and means for controlling the depth of the layer of adhesive on the second wheel.

9. In an adhesive applying mechanism, means for feeding the work, an adhesive reservoir and adhesive supply wheel rotatable therein, said wheel and reservoir being adjustable to cause the wheel to directly apply adhesive to the under side of work being fed by the feeding means, and an adhesive transfer wheel adapted to assume transfer relation with the supply wheel when the latter is in non-direct transfer position, and adapted to transfer glue to the top surface of work'being fed by said feeding means.

10. In a device of the class described, means for feeding material, a glue pot located below the work line, and a glue supply wheel operatively associated therewith, and a glue applying wheel arranged to receive glue from the supply wheel and apply it to the upper side of the material carried by the feeding means, means for controlling the flow of said glue, means for guiding said material into adhesive contact with the glue surface of said glue applying wheel.

11. An adhesive applying mechanism, including means for feeding material, an adhesive reservoir, a first wheel partly submerged in the adhesive of the reservoir and revolving on a horizontal axis, a second wheel operating on a vertical axis, having its lower face arranged in adhesive transfer relation with the first, and having said lower face in adhesive applying relation with the top surface of the material, and means for controlling the flow of adhesive which is to be transferred from the first wheel to the lower face of the second wheel, means for guiding said material under the edge of the said second wheel, and means for holding said material against said second wheel to cause a wiping action.

12. An adhesive applying mechanism, including means for feeding material, an adhesive reservoir, a first revolving wheel mounted on a horizontal axis and partly submerged in the adhesive of the reservoir, a second wheel revolving on a vertical axis and located for adhesive contact ,with said first wheel at a point on its periphery, and having adhesive transfer relation with the material on its opposite underside. and means for controlling the fiow of ad- 13. An adhesive applying mechanism, comprising means for feeding material to which adhesive is to be applied, an adhesive applying wheel rotating on a vertical axis an adhesive feeding wheel rotating on a horizontal axis, the flat outer under surface of the adhesive applying wheel being in substantially tangential transfer relation to the cylindrical surface of the edge of the adhesive feeding wheel, and said flat surface of that wheel being also in adhesive transfer relation with that face of the material to which adhesive is to be transferred when said material is carried by said feeding means, and means for rotating the wheels in oppositedirections at that point where they are in tangential relation, so that the transfer surface of the adhesive feeding wheel travels downwardly toward and into the glue supply, and the transfer surface of the other travels away from the material towards the adhesive transfer point of the wheel, means for guiding said material under said adhesive applying wheel, means for holding said material against the underside of said adhesive applying wheel to cause a wiping action.

14. An adhesive applying mechanism, compris 1 ing means for feeding material, adhesive applying means rotative in 'a plane substantially parallel with the feeding plane of the material,

and having an adhesive transfer surface substantially parallel with the plane of rotation and adapted to assume overlapping transfer relation with the upper face of the material on said feeding means, and a glue supply disk in transfer relation with the adhesive applying surface of said adhesive applying means, means for guiding said material under said adhesive applying means, and means for holding said material in wiping contact with said adhesive surface of said adhesive applying means;

15. An adhesive applying mechanism, including means for feeding material to which adhesive is to be applied on, the upper side, comprising a driven adhesive pick-up first member operating on a horizontal axis, a second driven transfer member operating on a vertical axis, the under outer edge of said second member having adhesive transfer contact with said first member to transfer said adhesive to the upper side of said material, means for guiding said material under the edge of said second member, and means for holding said material against said second member to cause a wiping action of said second member on the upper surface of said material. i

EDWIN G. STAUDE.

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