US2833488A - Expansible core adapter - Google Patents

Description

ay 6, 1958 F.- J. KERBER 2,833,488

EXPANSIBLE CORE ADAPTER Filed May.24, 1956 PM Mr J. kERBE/P INVENTOR.

United States PatentC 2,833,488 EXPANSTBLE CORE ADAPTER Frank J. Kerber, Cedar Grove, N. J., assignor to John Dusenbery Company, Inc, Verona, N. J., n corporation of New Jersey Application May 24, 1956, Serial No. 586,993 4 Claims. (Cl. 242-'--55.15)

This invention relates to. a core adapted for use in the winding mechanism of a slitting machine and more particularly to an expanding core. adapter which holds a core upon which ribbons of material issuing from the slitting machine are wound. Expanding core adapters of the type contemplated by this invention have particular application inthe winding mechanism of paper slitting machines wherein the ribbons of paper which feedfrom the slitting machine are wound upon rotatably driven cores. The cores upon which the ribbons of material are wound are often made of paper and are constructed with a bore having tolerances of 2%.! or greater. The expandingcore adapter of this invention is used to mount the core on a, rotating shaft whereby the ribbons of material may be wound on the core. The core must fit snugly to the expanding core adapter so as to rotate therewith and yet be free enough to enable one to easily remove the core from the adapter by hand.

An object of this. invention is the provision of an arrangement for. securing a core to an expansible core adapter by which arrangement relative rotary movement between the core and expansible core adapter is prevented and yet the core may be freely slid on to and off from the expanding core adapter.

An objectof this invention is the provision of an expansible core adapter for use in mounting a core upon a rotatable shaft, the said expansiblecore adapter comprising a cylindrical-shaped body having a circumferential annular groove therein, an annular resilient member positioned in the said groove, and a coil spring positioned in the said groove. over the said annular resilient member, the sides of the spring coils normally extending above the said groove whereby a'core may be longitudinally pressed over the said core adapter, the said core being restrained from relative rotary movement with the said core adapter by action of the spring coils on the core.

These and other objects and advantages will become apparent from the following description when taken with the accompanying. drawings. It will be understood the drawings are for purposes of illustration and are not to be construed as defining the scope or limits of the invention, reference being had for the latter purpose to the appended claims.

In the drawings wherein like reference characters denote like parts in the, severalviews:

Figure 1 is a fragmentary front elevation of the winding mechanism of a paper slitting machine wherein the expansible core adapter of my invention is embodied,

Figure 2 is a central cross sectional view of my novel expansible core adapter showing a core mounted thereon, and

Fig 3 isa side View of my expansible core adapter.

Reference is now made to Figure. 1 wherein there is shown a shaft or mandrel 1 which is rotatably supported on a pair of suitable bearings 2 and caused to rotate by meansof a pulley3 attached to one end of the mandrel and a belt 4 which engages the pulley and is driven by a source of power not shown in the drawing. Three novel Cir -' tolerances of %4" or greater.

expanding core adapters, designated generally by the reference numerals 6, 7 and 8, are shown mounted spaced distances apart on the shaft, or mandrel, 1. While only three expansible core adapters are shown, it will be understood that any number may be mounted on a shaft of suflicient length. The bore in the expanding core adapters are large enough to permit rotation of the core adapters on the mandrel. Ribbons 9, 10 and 11, which may be of paper, plastic, metal or any other suitable material capable of being slit and wound, areshown being wound on cores 13, 14"and 15, which cores are mounted on the expansible' core adapters 6, 7 and 8, respectively. The cores upon which the ribbons are wound are often made of paper and are constructed with 'a bore having The expansible core adapter of my invention is utilized'to suitably mount such cores having diiferent diameter bores. The novel connection between the respective core and expansible core adapter, which comprises animportant part of this invention, is shown in detail'in Figures 2 and 3 of. the drawings and will be fully described later in the specification. The ribbons 9, 10 and 11 come ofi a cutting machine mechanism (not shown in the drawings) at a spaced distance apart and therefore the core and expanding core adapters are spaced on the mandrel so as'to be in lateral alignment with the oncoming ribbons. Lateral alignment of the expansible core adapters is accomplished by the use of a first fixed collar 16 which is secured to the mandrel 1 as by a set screw 17, or any other suitable. means, and spacers 18 and 19, which are positioned between the expansible core adapters 6, 7 and 8. The spacers 18 and 19 are secured to the mandrel 1 in such, a manner so as to rotate therewith and yet, at the same time, are axially slidable thereon. This is accomplished by use of a key 20 which is mounted in a radial opening 22 in theyspacer' as shown in the broken section of the drawingof the spacer 18. The key is provided with an elongated portion 21 which extends internally of the" spacer into a keyway 23 which runs the entire length of the mandreh By making the keyway 23 larger than the elongated portion 21 of the key 20, the spacers will easilyslide axially on the mandrel 1 and yet rotate therewith.

justed by changing the position at which the stop collar- 27 is fixed to the mandrel. The method by which an axial force is exerted on tbestacked elements is not essential to this invention and forms no part thereof. Other metheds-such as adjustable fluid pressure means could be used in place of-the spring 26 and associated parts. Also, it is obvious that the slidable collar 25 may be another spacer such as the spacer 18 or.19.

The operation of the winding mechanism of the slitting machine in which my novel expansible core adapter'is embodied may now be understood. The machine is set up for operation by axially adjusting. the fixed stop collar 16, after first loosening the set screw 17, to a position where the core 13, which has been properly placed in position on the expansible core adapter 6, is in alignment with the ribbon 9 which is coming olf the slitting machine. The set screw 17 is then retightened. A spacer 18 is next chosen of a proper width so as to place the core 14, which is on the expansible core adapter. 7, in alignment with the ribbon 10.. The spacer 18 is keyed to the mandrel 1 as above described. In a similar manner, the spacer 19 is selected and the expanding core adapter 8, along with the core 15, are properly mounted on the mandrel. The

below. t

The ribbons 9,10 @111 come ofi the slitting machine at a relatively constant rate determined primarily by'the rate at which the material is fed to the slitting machine. are: mandrel 1 is rotated at a speed which wouldwin-d the ribbons on the cores faster than the ribbons come off theslitting machine. The' ribbons 9, and 11,0bviously, can not be wound up faster than they become. available andi'therefore, slipping occurs between the spacers 181and 191 (which rotate with the, mandrel) and the expansible core adapters 6, .7 and8. This arrangement of staclred spacers and expansible core adapters results in a clutch engagement similar to the action of a multiple disc clutch; Slipping, of course, increases as the roll of ribbon: builds up on the core during the winding process. The winding tension is dependent upon the axial force between the stacked spacers and expansible core adapters and maybe adjusted by adjusting the position of the. stop csnarzv on the mandrel 1.

Wheri the, cores 13, 14 and 15 are wound full, they are removed from the expansible coreadapters 6, 7 and 8,

respectively, and empty cores placed thereon. Heretofore, when only one core adapter per core was used, it was .difiicult to obtain a snug fit between the core and core adapter so as to hold the two together without relative rotary movementduring the winding process, and yet 'havea core which was easilyreniioved from the expansible core adapter byhand. Because the core bores have "atoleran'ce of $96 or greater, as mentioned earlier, the core adapter must be of the adjustable or expansible type to accommodate the range of sizes of the core bores. Expansiblecore adapters to date have been both expansive to construct and cumbersome to use thereby making the handling of the same a slow process.

Reference is now made to Figures 2 and 3 of the drawings' wherein there is shownmy novel expansible .core

adapter whichlis both economical to manufacture-and simple to operate. The expansible core adapter comprises a cylindrical-shapedbody portion which is provided with an annular radial outwardly extending flange The core is slid to a position where the side of the core abuts the flange 31. The flange 31 helps to square the core on the adapter where only a single adapter per core is used. It may here be noted that where a wide core is being used, two adapters per core may be utilized; one adapter being pushed into each end of the core thereby providing the core with a pair of stable bearing supports.

Through the compression of the spring and resilient O-ring, the spring coils exert a constant radial pressure on the core. The pressure which is exerted, causes the spring coils to dig very slightly into the bore of the core and thereby prevent the core from rotating on the expansible core adapter. Even though the expanding action of the spring and resilient O-ring is relatively light, the

multiplicity of the spring coils afiords an effective reand it is intended thatsuch changes and modifications shall fall within thespirit and scope of the, invention as recited in the following claims.

I claim: l

1. A core adapter for mounting a core on a rotatable shaft, the said core adapter comprising a cylindricalshaped body having an annular groove therein, an annular resilient member seated in the said annular groove, a coil spring in the said annular groove over the resilient member, the said coil spring having spring coils normally extending radially above the circumferential edge of the groove whereby a core may be axially pressed over the said cylindrical-shaped body and restrained from rotary movement therewith by action of the spring coils on the core, and means mounting the said core adapter on a rotatable shaft.

2. An expansible core adapter for, use in mounting a core on a rotatable shaft, the said expansible core adapter 7 comprising a cylindrical-shaped body member having an friction coeflicient material such as plastic or other suitable material. The bushing may be press fitted in the bore of the expansible coreadapter and further held in place by an inwardlyextending annular flange '37, which fits in a recess in the bushing 36, and by staking the body 30 of .theexpansible core adapteriover the chamfered edge 38 ofthe bushing. The faces 39 and 40 may be machined to present smooth "friction surfaces for coaction with the spacers 18 and 19 described in connection with Figure 1 of the drawings t As mentioned above, the cores which fit on the expansible core adapters have bores of difierent sizes due to manufacturing tolerancsfl The dimensions of the expansible core adapter are'suchj that the outer periphery ofthe encircling garter spring :34 is slightly larger than the maximum boreofany core, while the diameter of the cylindrical portion of the body 30, over which the core fits, isslightly less than the minimum bore of any core; aresult, when a core is pushed axially onto an expansible core adapter and over the spring 34 the re silient O-ring 33 compresses, allowing the spring diameter to contract and permitting the core to pass over the spring.

annular groove. therein, an annular resilient member positioned in the. said annulargroove, a coil spring encircling the said cylindrical-shaped body member and positioned in the saidv groove over the said annular resilient member whereby the sides of the spring coils normally extend radially beyond the edge of the said annular groove, the said spring coils being adapted to be pressed radially inwardly in the said groove upon axially sliding a core onto the said cylindrical-shapedbody member, alnd means mounting the said core adapter on a rotatable s aft.

3. The invention ,as recited in claim 2, including an outwardly extending'fiange onthe said cylindrical-shaped body member, which flange is adapted to abut a side of the core when the core is in position on the expansible core adapter.

4. The invention as recited in claim 3 wherein the means mounting the said core adapter on a rotatable shaft includes a bushing of low coefiicient material pressed in the said cylindrical-shaped body member.

References Cited in the file of this patent UNITED STATES PATENTS 2,446,690 Carpenter n Aug. 10, 1948 2,704,681 Fischer 'Mar. 22, 1955 2,777,644 Nicholson Ian. 15, 1957 FOREIGN PATENTS 11,998 Great Britain or 1908

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