US2928619A - Supply roll support and coupling device - Google Patents

Description

March 15, 1960 J. A. BUR I'ON ETAL 2,928,619

SUPPLY ROLL SUPPORT AND COUPLING DEVICE Original Filed Oct. 10, 1955 INVENTORS John A. Burton Frederick D Helversen James B. Hyde Bfi r j; attorneys SUPPLY ROLL SUPPORT AND COUPLING DEVICE Original application October 10, 1955, Serial No. 539,332. Divided and this application April 15, 1957, Serial No. 653,001

2 Claims. (Cl. 24268.1)

This invention relates to coupling and supporting means for supply rolls of sheet material, and more particularly to a support plug insertable into the core of a supply roll of paper or the like to be positioned in a dispensing cabinet. The present application is a division of copcnding parent application, Serial No. 539,332, filed October 10, 1955, for- Supporting and Coupling Means for Supply Rolls.

Summarizing the invention, it has as its objects, among others, the provision of improved means for securing a supply roll coupling device in the end of a core of a supply roll, and which is of simple and economical construction that can be readily fabricated. Other objects of the invention will .become apparent from a perusal of the following description.

In general, the coupling device comprises a hub portion adapted to be inserted into the end of the core of a supply roll; the hub portion being provided with a special arrangement of barbs of special shape for engaging the core of the supply roll to prevent relative rotation between the core and the coupling devicev when the latter is inserted into the core. Such arrangement of barbs also prevents withdrawal of the coupling device, after it has once been inserted into the core.

For a more detailed description of the invention, reference is made to the drawings, in which,

Fig. 1 is a vertical longitudinal sectional view through a form of supply roll coupler mechanism and coupling device of a desirable type described and illustrated in detail in the aforementioned parent application, illustrating the position of the parts with the coupling device in one end of the supply roll;

Fig. 2 is a similar section illustrating a form of more or less conventional means for journalling the opposite end of the supply roll;

Fig. 3 is an isometric view of the coupling device adapted to be inserted into an end of the supply roll core; a portion of the device being shown broken away to disclose the construction more clearly; and

Fig. 4 is a fragmentary side elevation of the coupling device illustrated in Fig. 3.

In the type of dispensing cabinet referred to in the parent application, the supply roll is adapted to be supported on arms 11 and 12 forming part of a roll supporting frame (not shown), and pivoted for inward and outward movement with respect to a dispensing cabinet (not shown). A supply roll 15 of paper or the like is wound about the usual paperboard core 21. One support arm 12 carries a pivot pin 22 upon which a hub member 23 is journalled for free rotation; one end of a supply roll core 21 being adapted to be positioned on the hub 23. To limit axial movement of the supply roll when it is placed on hub 23, the hub is formed with a flange 24. Usually in mounting the supply roll on the arms 11 and 12, it is first positioned on hub 23; the arms 11 and 12 being capable of being spread apart for this purpose because of the flexibility thereof. When the roll is mounted on the arms, they spring inwardly to efiect proper support of the roll. I v

The opposite end of the supply roll is supported on special coupler mechanism indicated generally by reference numeral 26, which is journalled for rotation on a stud 33 on the other arm 11 of the supply roll support. The coupler mechanism is cooperable with a coupling device, indicated generally by reference numeral 27, secured in such opposite end of supply roll core 21 Cooperating means is provided on coupler mechanism 26 and on coupling device 27 for allowing free rotation of the coupler mechanism when it carries a supply roll but which results in automatic latching of the coupler mechanism against rotation relative to its support when the coupling device is disconnected. Such cooperating means includes openings 46 in coupler mechanism 26, matching projections 47, 47 and 47" on coupling device 27 and latching means, all fully described in the aforementioned parent application.

Coupling device 27 to which this application is directed is preferably made of molded plastic material but can be of any other material, such as metal. Such coupling device comprises a hub portion 51 adapted to be inserted into an end of core 21 of the supply roll, and an outer integral plate member 52 which carries actuating projections 47, 47' and 47" and limits inward axial positioning of the coupling device in the roll core. For preventing relative rotation between the roll core 21 and the coupling device when the latter is inserted into the core, and also for preventing withdrawal of the coupling device after it is once inserted into the core, it is provided on its hub portion 51 with a plurality of peripherally arranged axially extending and radially projecting elongated barbs 53; the barbs being positioned in axially spaced relationship with respect to plate 52 at the inner end of the hub 51.

As can be seen from Fig. 3, each of the barbs is of triangular cross section at any transverse section thereon and has triangular shaped sides 54 so that the barbs taper both inwardly and downwardly from a triangularly shaped end 56 thereof adjacent plate 52 and extending transversely to the axis of hub 51, thus' forming a relatively sharp edge 57 at the top. As a result, when hub 51 is inserted into the roll core, the resultant pointed shape of the barbs at their inner ends enables the hub to be readily inserted axially into the core while edges 57 cut into the core. However, because of the increased size of the barbs adjacent the plate end of the hub, the hub when fully inserted into the core cannot be withdrawn without damaging the core.

At the same time, the barbs fixedly secure the hub to the core against relative rotatable movement with respect thereto. In this connection, it will be noted with reference to Fig. 1 that the outside diameter of hub 51 is slightly less than the inside diameter of core 21 to facilitate insertion but at the same time prevent retraction by virtue of the larger outer ends 56 of the barbs. With the described construction, securing of the coupling device to the core can be quickly accomplished by merely a straight one-step endwise insertion-of the coupling device into the core without damaging the same.

The construction for securing hub 51 in the core, although described in connection with the advantageous type of coupling mechanism claimed in the aforementioned parent application, may be employed on the hub of any other type of supply roll coupling mechanism for holding the same in the core of the roll.

We claim: a

1. A molded coupling device for a supply roll of sheet material comprising a hub portion adapted to be inserted into the core of said roll and having at one end thereof a piate memberadaptedTo-enage an end of said roll to limit" the inward axial positioning of the device in the roll core, a plurality of peripherally arranged axially elongated radiallxproiecting barbs on. said. hub gorti on barbs having asu'btantially triangularlyshaped, enlarged end adjacent tovhut spaced from said plate; memberJand a relatively-sharp tap edgeextendingf'rom the apex of said enlargedendi each of said top edges sloping dqwnwar dly from said apex toward the opposite; end of said' 10 51151111: coupling deirice (if claim secured idsiid care by'saidbarbs at" a position whereinsaid plate-mew her engages an end of said rpll and the barbsare spaced from said roll end internally of the core.

References Citedirr the file (if this patent UNITED1STATE$ PATENTS

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