US2376069A - Adhesive applying machine - Google Patents

Description

May 15, 1945. H, w- MAR-HN 2,376,069

ADHESIVE APPLYING MACHINE 'Filed Oct. 15, 1943 Y Z1 31 Z5 K Patented May 15, 1945 ADHESIVE APPLYmG MACHINE Harold W. Martin, Malverne, N. Y., assignor to l American Seal-Kap Corporation of Delaware,

WilmingtomDel., a corporation of Delaware Application October 15, 1943, Serial No. 506,386

12 claims.

This invention relates'to a gluing machine and p has for its object to provide a new and improved machine for rapidly and efficiently applying an adhesive to a predetermined part of an article without requiring special the part of the operator.

Another object of the invention is to provide a machine of the above type for applying an ad. hesive to the inner surface of an lannular band or the like in such a way that the band may then be slipped over and secured to a support without smearing. l l

Still another object is to provide a machine of the type specified for use in the manufacture of paper caps for capping jars, bottles and the like, whereby an adhesive may be properly appliedto the inner, surface of an annular band for securing same upon the annular skirt or flange of the cap for reinforcing purposes. v

Various other objects and advantages will be apparent as the nature of the invention ismore fully disclosed.

The invention is particularly usefulv in the manufacture of composite paper capsofth'e type disclosed in a copending application of Carl W.

Goodwin, Serial No. 504,557, led October 1, 1943,v

comprising a diaphragm portionand an upstanding annular skirt formed in a single piece, and having an annular paper band surrounding the outer surface of the skirt for reinforcing same.

smaller in diameter than the annular band which is to be treated with adhesive, and beneath this opening is a reservoir for the adhesive which may be a water-soluble glue, although the term glue as employed herein is to be understood as referring to any of a. wide variety of adhesive substances. An applicator, which in this embodiment of the invention has a cylindrical outer surface, is adapted to pick up glue from the resplicator and manipulated in an instant to transfer the glue to the precise part oi the band where it is needed.

In this preferred embodiment of the invention the applicator, in rising from the reservoir, passes througha close-fitting ring or cylinder which acts as a doctoring device to remove the excess glue and allow it to drop back into the reservoir before the applicator emerges onto the platform.

voir. As a result, the glue-coated cylindrical outer surface of the applicator is the only part of the applicator which can possibly come in contact with the band to be treated, and the foregoing and other constructional features of the machine insure that said band will only be coated lin the precise area which is intended.

Although the novel features which are believed to be characteristic of the invention are pointed out more particularly in the claims appended hereto, the nature and scope of the invention may be better understood by referring to-the following description, taken in connection with the accom- In the interest of economy it is desirable to glue panying drawing forming a part thereof, in. which a specific embodiment has been set forth for purposes of illustration.

In the drawing:

Fig. 1 is a, plan view of the machine showing an annular paper band, partly in section,in position for gluing;

Fig. 2 is a vertical section through the machine,

taken on line 2-2 of Fig. 1;

Fig. 3 is a detail sectional view of the applicator and the doctor device for removing the excess adhesive therefrom;

Fig. 4 is a similar view showing-the applicator raised above the platform in position for applying 4 the adhesive to the band; and

ervoir and to be raised by a foot treadle or other V suitable means to a position above the platform where the annular band to b e treated may'be dropped over the glue-coated surface of the ap- Fig. 5 is a sectional view through a finished paper'cap with the outer annular band glued in place.

In the following description certain specic terms are used for convenience in referring to the various details of the invention. These terms, however, are to be interpreted as broadly as the state of the art will permit.

The apparatus shown in the drawing comprises -a vertical bearing bracket i supporting a hori'- zontal shelf 2, which is securedthereto' by bolts I.

A horizontal table top or platform 4 is mounted above the shelf 2, being separated therefrom by spacers 5, and is secured thereto by bolts 3.

The table top l has a central opening 1 in which is seated a plate or casting l having its upper surface flush with the table top and locked in place by a suitable-clamp 9 as shown in Figs. 1 and2. Y

The plate 3 has a circular opening Il which is `smaller in diameter than the paper band to be treated, as will be more readily apparent from the ensuing description. Mounted on the shelf 2, directly beneath the opening I3 in plate l, is a reservoir I2 comprising a cup-shaped container for the adhesive to be dispensed.

A vertically movable shaft I3 is mounted axially of the opening III in plate 3, being journaled in bearing I. This shaft extends upwardly through a flanged collar Il in reservoir I2, as shown in Fig. 2. A coil spring I3 surrounding bearing I and acting against a collar Il on the end of shaft I3 normally holds the shaft in itsl shield the shaft I3 from the adhesive material. A

hood having a downwardly sloping outer wall is secured to the top of shaft I3 and is adapted in all positions-of the shaft to overlie and shield the top of sleeve I9 against the ingress of ad- An applicator comprising a dished surface 2| and a cylindrical outer surface 22 is carried by, or formed integrally with, the lower end of hood 2li, so that any adhesive picked up by the hood 20 will iiow down the sloping wall of said hood into the dished surface 2| of the applicator. A plurality of holes 23 are formed in the dished surface 2| adjacent its juncture with hood 2U, as shown in Fig. 1, so that such adhesive will drain back into the reservoir I2. The cylindrical outer surface 22 of the applicator meets the dished surface 2| in a sharp knife-like annular edge 25, for a purpose hereinafter described.

A doctor member, having a cylindrical scraping surface 21 is carried by, or formed integrally with, the plate 3 of table top 4 in axial alignment with the shaft I3 and the cylindrical outer surface 22 of the applicator, as shown in Fig. 2. 'I'he cylindrical scraping surface 21 of the doctor member is only slightly greater in diameter than the cylindrical surface 22 of the applicator, the precise clearance between these surfaces determining the thickness of the layer of adhesive which will remain on the surface 22 of the applicator when it is raised to the operative position above the table top l, as shown in Fig. 2.

The shaft I3 is actuated in any suitable manner, as by a foot treadle acting on a pivoted lever I 8, the lever serving to shorten the foot stroke. Normally, the spring I 6 holds the shaft down,

, with the applicator in the glue. When the foot face.

Vaa'raoao cator passes through the cylindrical wall 21 of doctor member 23, so that excess adhesive is scraped olf the outer surface 22 of the applicator and drops back into lreservoir I2, as shown in Fis. 3.

In the embodiment illustrated, the doctor member 23 has a downwardly sloping surface and a plurality of holes 23 are formed about the outer periphery of this surface, whereby the excess adhesive flowing over the doctor member will also be drained back into the reservoir as illustrated in Fig. 3. As a result, when the applicator reaches the elevated position shown in Figs. 2 and 4, the outer cylindrical surface 22 of said applicator will contain a. predetermined even layer of adheslve for application to the inner surface of the annular band, as Iwill now be described.

The article to which the adhesive is to be applied as illustrated in Figs. l, 2 and 4 as comprising an annular paper band 30 having a turned-down beaded edge 3|, as disclosed in the above-mentioned application Serial No. 504,557. The band 30 forms part of the paper cap for Jars, bottles and the like, which is shown in Fig. 5 and comprises a diaphragm portion 32 and an up- Standing marginal flange or skirt 33 having integral screw threads 34 formed on its inner sur- The purpose of my gluing machine is to apply a ring of adhesive 35 to the inner surface of the annular band 30, so that, when the band is subsequently telescoped over the skirt 33 of the cap, it will firmly adhere thereto in a unitary structure, as show n in Fig. 5.

Accordingly, when the shaft I3 of the machine is elevated in the manner described above, raising the hood 20 and applicator 2| to the operative position shown in Fig. 2, the operator grasps a band 30 from an available supply and slips it over the hood 20, as shown in Figs. 2 and 4. The di ameter of the outer surface 22 of the applicator is smaller than that of the band 30, permitting the operator to slide the band eccentrically over the platform, so that with a few such manipulations a continuous ring of adhesive 35 is formed on the inner surface of the band.

The width of the cylindrical surface 22 of the applicator is preferably less than that of the band 30, as illustrated in Figs. 2 and 4, and the applicator is preferably raised above the platform sufilciently to confine the application of the adhesive to the central portion of the band, it being desirable to prevent the adhesive from encroaching upon the lower edge of the band as previously explained.

Since the cylindrical outer surface 22 of the applicator forms a sharp knife-like edge 25 with the dished surface thereof, the band 30 to be glued will rest upon the platform and may be freely manipulated in contact with the surface 22 of the applicator without contacting any other part of the applicator, thus avoiding any danger of smearing the outer surface or edge of the band. After gluing the band in the manner described, the operator simply removes the band from the machine and telescopes it over the skirt 33 of the,

cap, and, since the layer of adhesive 35 is confined to the inner portion of the annulus, as described above, this ilnal assembling operation is easily accomplished without any 'danger of smearing.

Although e, specific embodiment of the invention has been shown for purposes of illustration it is to be understood that the invention is capable of various uses and that changes and modi ilcations may be made therein as will be readily apparent t0 a person skilled in the art. The

aavaosc invention is only to be limited in accordance with the scope of the appended claims.

What is claimed is:

l. A machine for applying adhesive comprising a platform having an opening therein, a.v

reservoir for the adhesive disposed beneath said opening, an applicator mounted to be moved from within said reservoir to a position above said opening to permit the application of ad` heslve to an article resting on said platform, and means between said reservoir and said plat form, for scraping excess adhesive from said applicator.

to a position slightly above said opening to permit an annular band resting on said platform to surround said applicator and to be manipulated in contact with the cylindrical surface thereof without falling through said opening, and means between said reservoir and said platform for scraping excess adhesive from said applicator.

3. In a machine for applying an adhesive to the inner surface of an annular band, a platform having a circular opening smaller in diameter than the band to be treated, a reservoir for the adhesive disposed beneath the opening in said platform, an applicator having a cylindrical outer surface mounted to be moved from within said reservoir to a position slightly above the opening in said platform to permit an annular band resting on said platform to"surround said applicator and to be manipulated in contact with the cylindrical surface thereof without falling through said opening, and a cylindrical doctor member of only slightly greater diameter than said applicator mounted in alignment therewith between said reservoir and said platform for scraping v'excess adhesive from said applicator.

4. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having an opening smaller than the diameter of the band to be treated, a reservoir for the adhesive disposed beneath said opening, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, and an applicator carried by said shaft having a dished top surface positioned to lie in said reservoirin the downward position of said shaft and having means for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage an annular band resting on said platform around said applicator.

5. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having an opening smaller than the diameter of the band to be treated, a reservoir for the adhesive disposed beneath said opening, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, and an applicator carried by said shaft having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and having means for draining adheslve back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge.

6. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having an opening smaller than the diameter of the band to be treated, a reservoir for the adhesive disposed beneath said opening. a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a hoodghaving a downwardly sloping outer wall secured to the top of said shaft. and an applicator carried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and having means for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge.

"l, In a machine for applying adhesive to the inner surface of an annular band. a horizontal platform having an opening smaller than the diameter of the band to be treated, a reservoir for the adhesive disposed beneath said opening, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a hood having a downwardly sloping outer wall secured to the top of said shaft, an applicator carried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and having means for draining adhesive back into said reservoir when said shaft is raised, said applicator hav. ing a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and means between said reservoir and said platform for scraping excess adhesive from said applicator.

8. In va machine for applying adhesive to the inner surface of an annular band, a horizontal platform having an opening smaller than the diameter of the band to be treated, a reservoir for the adhesive disposed beneath said opening, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a hood having a downwardly sloping outer wall secured to the top of said shaft, an applicator carried by said hood having a dished top surface positioned to liein said reservoir in the downward `position of said shaft and containing a plurality of holes adjacent its juncture with said hood for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and means between said reservoir and said-platform for scraping excess adhesive from said applicator.

9. In a machine for applying adhesive to the inner surface of an, annular band, a horizontal platform having a circular opening smaller in diameter than the band to be treated, a rservoir for the adhesive disposed beneath the opening in said platform, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a sleeve in said reservoir surrounding said shaft to a point above said reservoir to shield said shaft from said adhesive. a hood having a downwardly sloping outer wall secured tothe top of said shaft, an applicator carried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and containing a plurality of holes adjacent its juncture with said hood for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cyiindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and means between said reservoir and said platform for scraping excess adhesive from said applicator.

10. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having a circular opening smaller in diameter than the band to be treated, a reservoir for the adhesive disposed beneath the opening in said platform, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a sleeve in said reservoir surrounding said shaft to a point above said reservoir to shield said shaft from said adhesive, a hood having a downwardly sloping outer wall secured to the top of said shaft, an applicator car ried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and containing a plurality of holes adjacent its juncture with said hood for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and a cylindrical doctor member of only slightly greater diameter than said applicator mounted in alignment therewith between said reservoir and said platform for scraping excess adhesive from said applicator.

1l. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having a circular opening smaller in diameter than the band to be treated, a reservoir 'for the adhesive disposed beneath the opening in said platform, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a spring acting on said shaft; to normally hold same in its downward position, a sleeve in said reservoir surrounding said shaft to a point above said reservoir to shield said shaft from said adhesive, a hood having a downwardly sloping outer wall secured to the top of said shaft, an applicator carried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and containing a plurality of holes adjacent its juncture with said hood for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and a cylindrical doctor member of only slightly greater diameter than said applicator mounted in alignment therewith between said reservoir and said platform for scraping excess adhesive from said applicator.

12. In a machine for applying adhesive to the inner surface of an annular band, a horizontal platform having a circular opening smaller in diameter than the band to be treated, a reservoir for the adhesive disposed beneath the opening in said platform, a vertically movable shaft mounted axially of said opening and extending upwardly through said reservoir, a spring acting on said shaft to normally hold same in its downward position, a sleeve in said reservoir surrounding said shaft to a point above said reservoir to shield said shaft from said adhesive, a hood having a downwardly sloping outer wall secured to the top of said shaft, an applicator carried by said hood having a dished top surface positioned to lie in said reservoir in the downward position of said shaft and containing a plurality of holes adjacent its juncture with said hood for draining adhesive back into said reservoir when said shaft is raised, said applicator having a cylindrical outer surface to engage said band meeting said dished surface in a sharp knife-like annular edge, and a doctor member having a-cylindrical scraping surface of only slightly greater diameter than said applicator mounted in alignment therewith between said reservoir and said platform for scraping excess adhesive from said applicator,I

said doctor member having a downwardly sloping outer surface and holes formed outwardly thereof for draining said excess adhesive back into said reservoir.

HAROLD W. MARTIN.

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