CA1226727A - Bonding device in an article applying machine - Google Patents

Abstract

Abstract:
A bonding device is disclosed for use in a machine for applying a series of articles to surfaces of respective ones of a series of containers. The containers are held in receptacles on the periphery of a wheel that is rotated to bring the containers successively to a location where an article is applied thereto. The bonding device comprises an arm carrying a pressure plate for urging each article firmly against a container. The arm is oscillated so that the plate thereon describes a locus that extends from a withdrawn position to an active position in which the plate applies pressure to the article. The locus includes a portion extending tangentially of the wheel periphery when in the active position to travel with the article while applying pressure thereto. The plate can also describe an alternative locus in which it remains out of contact with the article.

Description

A bonding device in an article applying machine The present invention relates to a bonding device for use in a machine for applying a series of articles to surfaces of respective ones of a series of containers, said containers being held in receptacles on the periphery of a wheel that is rotated to bring said containers successively to a location where a said article is applied thereto.
An embodiment of the present invention is illustrated in the accompanying drawings, in which:
Fig. 1 is a schematic view of a machine in which the embodiment is used;
Fig. 2 is a schematic view illustrating the operation of this machine;
Fig. 3 is a front view of the embodiment;
Fig. 4 is a partially cut away plan view of Fig. 3;
Fig. 5 is a front view illustrating one example of an interlocking mechanism;
Fig. 6 is an enlarged front view showing the locus described by an active member of the embodiment;
Fig. 7 is a perspective view of a strip ox articles;
and Fig. 8 is a perspective view illustrating the manner in which one such article can be applied to a container.
A continuous strip A' of separable bags A (Fig. 7) are drawn off from a reel G (Fig. 1), separated by a cutter B

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and transmitted to a transfer drum C (Fig. 2). At the same time below the drum C containers E are fed by a wheel D to a position where each container E faces upwardly to receive the bag A which is adhered thereto.
More details of this machine are described in cop ending Canadian patent application Serial No. 444,362 of Y, Utsumi filed December 28, 1983 and in the companion applications referred to therein.
During rotation of the wheel D hot melt adhesive will lo have already been applied to the external face of the container E by an applicator H. The bag A is pressed against such adhesive to enhance the adhering process by a bonding device F. As shown in Figs. 3 and 4, the device F
consists of an arm 1 mounted at one end eccentrically on a shaft a and a pressure plate 2 mounted on the free end of said arm 1. Thy arm 1 carries intermediate its ends a pivot pin d which supports a lever 4 that in turn is - pivoted by a pin C to a lever 3 connected to a shaft b supported in the housing. A cam lever 5 is firmly mounted 2Q on the shaft b at a location remote from the lever 3, the end of this cam lever 5 engaging a cam 6 on a shaft e.
The shafts a and e and a shaft f of the wheel D are interlocked with each other One example of such an arrangement is shown in Fig. 5. A gear pa firmly mounted I on the shaft a engages through an intermediate gear 9 with a gear ye firmly mounted on the shaft e. The shaft e is also firmly equipped with a wheel eye driving a belt 12 extending to a wheel fig firmly mounted on a shaft g located nearer the shaft f. A gear 13g firmly mounted on the shaft g engages through an intermediate gear 15 with a gear 14f firmly mounted on the shaft f.
This arrangement causes the shaft a to rotate clockwise upon clockwise rotation of the shaft f and for the right hand end of the arm 1 to be given an eccentric motion. At the same time the cam 6 on the shaft e rotates clockwise and the cam lever 5 is oscillated with the shaft b forming the axis. This movement is transmitted through 22~3~ 2`7 the levers 3 and 4 to the arm l to cause the tip of the plate 2 to describe the locus shown in Fig. 6. The length of the circumference of this locus is obtained by dividing by an integral number the distance between the container position Ho shown in chain dotted lines in Fig. 6 along the circumference of the wheel D and the container position El shown by full lines.
Since the plate 2, which is always actuated, does not need to perform a pressing function when the container is in the position Ho, it is then arranged to describe the locus Al which is withdrawn from the periphery of the wheel. Since there is a need to perform a pressing function when the container is located in the position El, the plate 2 will then describe a locus Q2 which brings it into contact with the periphery of the wheel D, engaging the end face of the container E with the bag A there-between. As a result an approximately horizontal straight ; line portion Q3 will appear in this area of the locus I. Such an arrangement tends to move the plate 2 in the tangential direction ox the wheel D at a speed approximately identical to the peripheral speed of the wheel so that there is no tendency to tear or otherwise mar the surface of the bag A or to separate it from the container E. On the contrary, the adhesion between the bag and the container is improved by the downward pressure.
Hence, it its broad scope the bonding device of the present invention can be defined as a bonding device comprising (a) an arm carrying a pressure plate for urging an article firmly against a container, and (b) means for oscillating the arm so that the plate thereon describes a locus that extends from a withdrawn position to an active position in which the plate applies pressure to the article, the locus including a portion extending tangent tidally of the wheel periphery when in said active position to travel with the article while applying pressure thereto.

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Claims (3)

Claims:

1. In a machine for applying a series of articles to surfaces of respective ones of a series of containers, said containers being held in receptacles on the periphery of a wheel that is rotated to bring said containers successively to a location where a said article is applied thereto; a bonding device comprising (a) an arm carrying a pressure plate for urging a said article firmly against a said container, and (b) means for oscillating said arm so that the plate thereon describes a locus that extends from a withdrawn position to an active position in which said plate applies pressure to said article, said locus including a portion extending tangentially of the wheel periphery when in said active position to travel with the article while applying pressure thereto.

2. The apparatus of claim 1, wherein said means for oscillating the arm includes means for causing said plate to describe an alternative locus in which it remains out of contact with the article.

3. The apparatus of claim 1, wherein said means for oscillating the arm comprise (c) means freely pivotal mounting an end of the arm remote from the plate about a member having an eccentric motion around a driven shaft, (d) pressure means engaging a portion of the arm intermediate between the plate and said remote end for pivoting said arm about said member to apply said pressure to the article, and (e) means coordinating movement of said driven shaft and said pressure means to cause said pressure to be applied to the article during a portion of said eccentric motion that extends in the same direction as the movement of the container with the wheel.