US2787244A - Intaglio glue mechanism - Google Patents

Description

April 2, 1957 R J. HlCKlN I 2,787,244

' INTAGLIO GLUE MECHANISM Filed Aug. 5, 1954 2 Sheets-Sheet l 8' INVENTOR ATTORNEY April 2, 1957 R. J. HICKIN INTAGLIO GLUEMECHANISM 2 Sheets-Sheet 2 Filed Aug. 5, 1954 INVEQNTOR ATTORNEY United tates Patent 2,787,244 INTAGLIO GLUE MECHANISM Robert J. Hickin, Seville, Ohio, assignor to The Ohio lgpgboard Company, Rittman, Ohio, a corporation of Application August 5, 1954, Serial No. 448,028

2 Claims. (Cl. 118-259) This invention relates to glue mechanisms, particularly those which are employed in machines for setting-up paperboard receptacles for applying adhesive to parts of such receptacles which are to be secured together, and it has special reference to a glue mechanism in which the roller or Wheel that comes in contact with the part to which the adhesive is to be applied receives such adhesive directly from a fountain or pot without the interposition of the customary intermediate applicator rolls.

One object of the invention is to provide a glue mechanism particularly of the type in which the adhesive-apply ing roller is or" intaglio type having depressions in its peripheral surface of a form and relative arrangement such as will cause to be deposited upon the part to be glued a predetermined pat-tern of adhesive.

Another object of the invention is to provide a glue mechanism in which the glue fountain or pot has its interior in direct communication with the peripheral surface of the glue-applying roller or wheel, with the edges of its walls so formed as to provide sealing contact with the periphery of the roller or wheel so as to preclude escape of adhesive from the pot or fountain except to those depressions formed in the peripheral surface of the roller or wheel which are designed to carry the predetermined pattern of adhesive to the parts to be adhesively secured.

A still further object is to provide those portions of the walls of the glue fountain or pot which engage the periphery of the wheel or roller substantially parallel with its axis as it enters and leaves the fountain or pot, respectively, with contact means so formed as to preclude fouling of the wheel or roller, and doctor or scraper means for insuring that the operative portion of the peripheral surface of the roller, excepting the depressions therein, will be cleared of adhesive as it leaves the pot or fountain to thus make certain the deposition of the adhesive upon the parts to be secured only in the predetermined pattern defined by the depressions referred to.

Still another object is to provide a glue mechanism of the type referred to in which the glue pot or fountain may be angularly adjusted with respect to the axis of the roller or wheel so that the mechanism may be converted from an overhead gluer to an underneath gluer, and vice versa, as desired or required, thus greatly enhancing its adaptability.

Another object is to provide the doctor or scraper means in such form, and so associated with, and assembled upon, the glue pot or fountain, that the doctor or scraper blade forming a part thereof may be adjusted to bear against the glue wheel or roller with desired pressure, and may be removed for cleaning and/ or replacement when necessary.

The invention comprises the combination with a cylin- 2,787,244 Patented Apr. 2, 1957 drical, rotary glue wheel or roller having means defining an intaglio glue pattern in its peripheral surface, of a glue pot or fountain having side walls disposed normal to the axis of said wheel or roller with their roller-adjacent edges shaped to conform to the curvature of, and contacting, such peripheral surface and held thereagainst in engagement sufficiently tenacious to preclude seepage of adhesive onto the outwardly laterally disposed surfaces on the periphery of said wheel or roller, 21 back wall to ward which the periphery of said wheel or roller approaches during its rotation and provided with an edge so formed as to furnish adhesive-sealing engagement: with said surface, and a front wall from which the periphery of the wheel or roller recedes during its rotation, said front wall being provided with doctor or scraper means serving to confine the adhesive carried by the wheel or roller from said glue pot or fountain to the depressions of the intaglio design in the periphery thereof, all as will be explained hereinafter more fully and finally claimed.

In the accompanying drawings illustrating the invention, in the several figures of which like parts are similarly designated,

Fig. 1 is an end elevation of a glue wheel or roller with the glue pot or fountain associated therewith in accord? ance with the invention,

Fig. 2 is a front view of the parts shown in Fig. l as viewed from the left of Fig. 1,

Fig. 3 is a sectional elevation taken substantially in the plane of line 3--3 of Fig. 2,

Fig. 4 is a fragmentary rear view of parts of the apparatus as viewed from the right of Fig. 1,

Fig. 5 is an exploded perspective view of the salient parts of the glue pot or fountain,

Fig. 6 is a bottom plan view of the glue pot or fountain, and

Fig. 7 is a view similar to Fig. 3, but showing the parts in position to provide an underneath gluer as distinguished from the arrangement of Figs. 1 to 4 which provides an overhead gluer.

In its operative aspect, the apparatus of the invention includes, as essential elements, the glue pot or fountain a and the glue wheel or roller 17, appropriate means 0 for assembling these two elements in operative association, and means d for holding and guiding a part 2 to which adhesive is to be applied.

As shown (Figs. 2, 3, 4 and 7) the glue wheel or roller b is of intaglio type having two rows of circular adhesive receiving depressions or cavities arranged in regular spaced relation circumferentially of its periphery and suitable for deposition of one type of spot-gluing pattern. This arrangement of the depressions or cavities will be understood as purely optional, it being obvious that other shapes and arrangements of such depressions or cavities can be provided to accommodate the apparatus to the particular type and pattern of adhesive deposition de sired.

The glue pot or fountain a (see particularly Fig. 5) has similar side walls 1, the lower edges 2 of which are curved upon a radius complemental to the radius of the glue wheel or roller b and adapted to seat against the periphery thereof inwardly of the ends of the wheel or roller with such exactitude as to preclude leakage past them, and to laterally outlying portions of the said periphery, of adhesive from the bath 3 thereof (Figs. 3 and 7) contained within the pot or fountain.

The aek'wau 4 (Figs. 4," 5, 6, and 7) of the pot or fountain prdvided' atte-idwereagewnuan" especially formed surface for contact with the periphery of the glue wheel or roller 12, this surface comprising an arcuate portion 5 complemental to the curvature of such periphery and hence coincident with the curves of the bottom edges 2 of the side walls 1, a flattened portion 6 which extends tangentially of and is out of contact with such periphery, and similar pointed leading'edge portions '7 the points of which contactwith, and conform upon their lower/faces tofthe curved surface of'the periphery'of the glue wheel or roller. This'particular conformation of the glue wheel contacting edge of back" 'vvalfhasbeen found to be especially effectivanot only'iri providing a-seal which precludes escapepast it of adhesive from the gluepot or fountaimbut infreeingfromfhe contacted portion of the periphery of the glue wheelfandcausing return to the pot, any residualadhesive or adhesive which may not have been pickedup from'the depressions or cavities Ztl upon contact with the part e to be secured. -lt will serve, moreover, to scrape'from the wheel periphery any foreign matter or the like which might be adhering to it prior to its passage into the confines of the glue' pot.

The front wall 8 of the glue pot or fountain a (Figs. 2, 3, 5, 6, and 7) is preferably formed as a relatively heavy plate secured in liquid-tight assembly'between-the front edges of the side walls T by screws'9. This plate terminates short of the side walls and is formed at its outer face adjacent to its lower edge with a recess iii the rear wall 11 of which is arranged at an angle to receive and support a relatively flexible doctor or s'craperblade 12 at an incline determined as suitable for the flexed engagement of its lower edge in doctoring contact withthe periphery of the glue wheel or roller 1;. This doctor blade 12 has its lateral edges closely contactingthe side walls 1 of the glue pot, and is frictionally retained within the recess 19 against the rear wall 11 thereof, and with its lower edge in properly adjusted tension against the periphery of the glue wheel, by a follower plate *3 under the influence of a keeper plate 1 adjustably secured to the front plate 8 by screws 15 and lock washers 16.

The top of the glue pot or-fountain is preferably provided with a cover plate 17 liquid-sealed at its edges to the top edges of the walls of the pot, and this plate may furnish a means for connection with the pot of a pipe 18 for the introduction into, and maintenance within, the pot of the bath of adhesive 3 at a suitable level, and the cover plate may also be provided with a vent opening 19 so that the bath of adhesive may be maintained at atmopheric pressure.

As hereinbefore stated, the depressions or cavities 26 in the periphery of the glue wheel or roller b-may be varied in form and arrangement, those shown being adapted to produce a relatively uniform glue pattern of the spotgluing type.

Referring particularly to Figs. 1, 2 and 4, it will be seen that the glue pot or fountain a is so arranged with respect to the peripheryof the glue wheel or roller b that the side walls 1 of the pot ernbrace between them the paths of passage of the depressions or cavities 2t of the periphery of the wheel. Thus, whilethe wheel turns, and its periphery passes within theglue pot in the direction of the arrow (Figs. 1, 3 and 7), from the back wall 4 to the doctor or scraper blade 12, these depressions or cavities 2%? will be filled with adhesive and all excess thereof will be retnovedfrom the uniform surface of the wheel by the doctor blade 123 and retained within the pot, so that only the adhesive carried over by the depressions or caviti'es'Ztl will be deposited upon the part e held in contact with the periphery. of the wheel by the holding and guiding means a.

lit should be noted here that as the depressions 2t? pass beneath the lower edge of the back wall 4 of the glue pot, escape of adhesive from thepot'byfway of these depressions will be prevented by capillary action aided by the particular formation of the arcuate portion 5 and the flattened portion 6 of such lower edge. Moreover, in'its function of causing any residual adhesive, or especially adhesive remaining in the cavities 26, to return to the confines of the pot, it will be noted that the flattened portion 6 provides at the periphery of the wheel a wedge-shaped recess between the points 7 which, combined with the travel of the wheel, tends to confine and force the adhesive beneath the arcuate portion 5 and into the pot. Furthermore, adhesive remaining in the cavities 20 tends to bulge or crown upwardly, and the particular conformation of these portions 5 and 6 will serve to flatten out the adhesive and facilitate its reintroduction into the pot.

Various means c may be provided for mounting the glue pot a and glue .wheel b in relative operative assembly. One such means is illustrated in Figs. 1 and 2, and includes link members-21 jo urnalled on the drive shaft 22 of the glue wheel and provided at their upper ends with a rigid connection (not shown). These links are formed with elongated apertures 23 through which extend positioning and guiding bearing elements 24 laterally ofistanding from and suitably afiixed to and carried by the side walls 1 of the glue pot. Through these bearing elements 24 extend guiding and adjusting rods 25 passing through the bores of complemental bosses 26 and 27 carried by the links 21 adjacent to the upperand lower extremities of the apertures 23, the bore of one of such bosses, preferably the upper one 26, being provided with an internal screwthread for engagement with the complemental screwthread 23 of the end of the respective rod 25. These rods are provided with relatively axially fixed collars 29 between which and the upper surfaces of the bearing elements 24 are interposed compression springs 30 which serve to force the arcuate edges 2 of the side walls 1, and the lower edges 5-6-7 of the back wall 4, of the glue pot a into proper sealing engagement with the pe riphery of the glue wheel b. Obviously, the tenacity of such sealing engagement may be appropriately varied, to accommodate proper rotation of the glue wheel, through suitable adjustment of the rods 25 by means of their screwthreaded association with the bosses 26.

Instead of seating the glue pot or upon the periphery of the glue Wheel b by spring pressure, as just described, longitudinally rigid sleeves (not shown) might be substituted for the springs 30, and a non-yielding seating adjustment be thereby obtained. It will be understood, moreover, that the mounting means described are merely representative and not exclusive of other appropriately functioning means.

As shown in Fig. 7, the glue mechanism may be converted from an overhead gluer (Fig. l) to an underneath gluer, and vice verse, by angular adjustment of the link members 21 and their associated glue pot with relation to the glue wheel to such a position as will serve to provide adequate clearance between the part e, to which adhesive is to be applied, and the glue pot. Any suitable means may be provided to hold the members 21 and the glue pot fixed in their adjusted positions.

Various changes and modifications are considered to be within the principle of the invention and the scope of the following claims.

What I claim is: I

1. In a glue mechanism, a rotatable cylindrical glue wheel, and a glue pot, means for mounting said glue pot H for adjustment circumferentially of said glue wheel about the axis of rotation of fsaidwheel to thereby adapt the wheel for use as either an overhead or underneath gluer, said glue pot having side walls disposed transversely of the axis of said wheel and the edges of said walls being curved complementally to and for sealing engagement with the curved surfaces of said wheel, and front and back walls and a cover for said pot, said front wall being disposed in a plane which intersects the cylindrical surface of said wheel and being provided with doctor blade means for confining adhesive supplied tosaid"surface to the desired minimum, said back wall having an edge in Wiping contact with the surface of the wheel, the side, front and back walls of said pot, including said doctor means, in cooperation with the surface of said wheel providing means for confining a bath of adhesive in contact with said wheel surface and from which adhesive may be fed by said wheel.

2. A glue mechanism as claimed in claim 1, in which the edge of said back wall in contact with said wheel surface has a portion angularly ofistanding from and out of 10 2,399,688

contact with said wheel surface, said ofi'standing portion 6 having parts merging augularly at its ends with adjacent portions of the respective side walls, whereby the extreme rear ends of the Wheel contacting edges of said side walls are formed with points.

References Cited in the file of this patent UNITED STATES PATENTS Cox -Q Feb. 17, 1942 Metzner et a1. May 7, 1946 Rhodes Jan. 13, 1953

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