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Publication numberUS3677122 A
Publication typeGrant
Publication dateJul 18, 1972
Filing dateMar 23, 1971
Priority dateMar 23, 1971
Publication numberUS 3677122 A, US 3677122A, US-A-3677122, US3677122 A, US3677122A
InventorsDonald E Rautine
Original AssigneeLord Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Slitting apparatus having independent resiliently supported anvil means
US 3677122 A
Abstract
Anvil means for a slitting apparatus having a pair of parallel rotatable first and second arbors, and a plurality of slitting discs concentrically mounted and spaced axially along the first arbor for rotation therewith comprising a plurality of annular rings concentrically disposed axially along the second arbor and elastomer means disposed and adhered, preferably bonded, between each of the rings and second arbor and mounting each of the rings for rotation with the second arbor. The elastomer means resiliently hold each of the rings in preloaded rolling engagement with at least one of the discs. Bulge free areas are defined between adjacent rings and provide for the displacement of the elastomer means whereby each ring is capable of resilient movement radially of the axis of the second arbor independently of each other.
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United States Patent Rautine [54] SLITTING APPARATUS HAVING INDEPENDENT RESILIENTLY SUPPORTED ANVIL [72] Inventor: Donald E. Rautine, Erie, Pa.

[73] Assignee: Lord Corporation, Erie, Pa.

[22] Filed: March 23, 1971 [21] Appl. No.: 127,097

[52] US. Cl "83/506, 83/347, 83/425,

[451 July 18, 1972 Primary Examiner-Andrew R. .luhasz Assistant Examiner-W. Donald Bray Attorney-James W. Wright [57] ABSTRACT Anvil means for a slitting apparatus having a pair of parallel rotatable first and second arbors, and a plurality of slitting discs concentrically mounted and spaced axially along the first arbor for rotation therewith comprising a plurality of annular rings concentrically disposed axially along the second arbor and elastomer means disposed and adhered, preferably bonded, between each of the rings and second arbor and mounting each of the rings for rotation with the second arbor. The elastomer means resiliently hold each of the rings in preloaded rolling engagement with at least one of the discs. Bulge free areas are defined between adjacent rings and provide for the displacement of the elastomer means whereby each ring is capable of resilient movement radially of the axis of the second arbor independently of each other.

5 Clains, 3 Drawing Figures PATENTEU JULI 8 1972 all!" R Y .@N E N NT R W 0 NA T M m E w 3 w 9 F Y B 2 g F SLITTING APPARATUS HAVING INDEPENDENT RESILIENTLY SUPPORTED ANVIL MEANS This invention relates to an apparatus for slitting sheet material, such as elastomer, plastic, paper, metal, and the like. More particularly, the invention relates to improved resiliently mounted anvil means for preloading individual slitting discs of a slitting apparatus while accommodating for eccentricity of the slitting discs and anvil means, variations in diameter between slitting discs or anvil means, flexing of the arbors, wear of the slitting discs and anvil means, and other like problems which affect the rolling engagement of the slitting discs and anvil means.

While slitting apparatus of various modes of operation are available, many of these slitting apparatus employ two parallel rotatable arbors. A plurality of slitting discs are mounted axially along the axis of one of the arbors for rotation therewith and are spaced in accordance with the widths desired to slit the sheet material. The slitting is accomplished by having the slitting discs operating in rolling engagement with the other arbor or anvil means rotatably carried thereby so as to slit sheet material upon being passed therebetween. Where the proper operation of slitting apparatus depends upon the rolling engagement of a plurality of slitting discs mounted on a single rotating arbor with anvil means also carried by single rotating arbor, eccentricity of the slitting discs and anvil means, variations in diameter between slitting discs or anvil means, flexing of the arbors, wear of the slitting discs and anvil means are very critical to the prolonged successful operation of the apparatus. Since, it is substantially impossible to control the above problems to a sufficient degree, there is a need to eliminate their effect on the operation of a slitting apparatus.

In order to alleviate the above-mentioned problems, various approaches have been suggested. One approach is to have each slitting disc received in a recess in the anvil means. The slitting is accomplished by the discs slitting the sheet material while the sheet material is supported by the portions of the anvil means adjacent the recesses. Another approach has been to shear the sheet material between overlapping and engaging slitting discs rotatably carried by the respective arbors. These approaches, while successful for slitting some materials, remain unsuccessful for others.

Still another approach has been to resiliently mount the slitting discs or anvil means in an attempt to accommodate for the previously discussed problems. However, these devices have heretofore been rather complicated and expensive or do not provide for independent accommodation of these problems between slitting discs.

Thus, it is an object of the present invention to provide in a slitting apparatus improved resiliently supported anvil means for accommodating for such problems as eccentricity of the slitting of the discs and anvil means, variations in diameter between slitting discs or anvil means, flexing of the arbors, wear of the slitting discs and anvil means, and the like.

Another object of the present invention is to provide improved anvil means which are preloaded in rolling engagement with the slitting discs and allow independent accommodation of the above-mentioned problems between slitting discs.

Briefly, the objects of the present invention are accomplished by providing in a slitting apparatus having a pair of parallel rotatable first and second arbors, and a plurality of slitting discs concentrically mounted and spaced axially along the first arbor for rotation therewith, improved anvil means. The improved anvil means comprises a plurality of annular rings concentrically disposed axially along the second arbor and elastomer means disposed and adhered between each of the rings and second arbor and mounting each of the rings for rotation with the second arbor while resiliently holding each of the rings in preloaded rolling engagement with at least one of the plurality of discs. Adjacent annular rings and elastomer means define a bulge free area between adjacent rings for the displacement of the elastomer means and, thus, allows for resilient movement of the rings radially of the axis of the second arbor independently of each other.

Some of the objectives of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which:

FIG. 1 is a schematic perspective view with parts broken away of a slitting apparatus employing the improved anvil means of the present invention;

FIG. 2 is an enlarged sectional view taken substantially along the line 2-2 of FIG. 1 illustrating an improved anvil means and its cooperation with a slitting disc; and

FIG. 3 is an enlarged fragmentary sectional view more clearly illustrating the cooperation between adjacent anvil means and their associated slitting discs of the slitting apparatus of FlG. 1.

Referring more specifically to the drawings wherein like reference characters are employed to indicate like parts, there is shown schematically in FIG. 1 a slitting apparatus, generally designated at 10, constructed in accordance with the present invention. As illustrated, slitting apparatus 10 is supported by a supporting structure 11 and includes a slitting section,-

generally indicated at 12, and feeding sections 13 and 14, spaced on opposite sides of the slitting section 12 for feeding sheet material S through the slitting section 12.

The slitting section 12 includes spaced upstanding frame embers l5 and16 between which is rotatably journaled to parallel arbors 17 and 18. Means, not shown, are provided for drivingly rotating the arbors l7 and 18 in opposite directions as indicated by the arrows. While not specifically shown, it will be understood that the journals for the arbors 17 and 18 are adjustably mounted in frame members 15 and 16 and may be adjusted by arbor adjustment means 19.

A plurality of slitting discs 20 of substantially uniform diameter are concentrically mounted axially along arbor 17 for rotation therewith. With reference to FIGS. 2 and 3, each slitting disc 20 is of annular shape and has a cylindrical periphery defining a circular cutting edge 21. The slitting discs 20 are keyed on the arbor 17 for rotation therewith by a key 23 that extends along the length of arbor l7 and is received in mating keyways 24 and 25 formed in arbor l7 and slitting discs 21, respectively. The axial spacing of the slitting discs 20 is determined by annular spacer sleeves 26 FlG.- 3, which are likewise keyed to arbor 17.

The improved anvil means of the present invention is mounted on arbor 18 for rotation therewith. With reference to FIGS. 2 and 3, the improved anvil means, in its preferred form, comprises a plurality of separate and independent anvil means, generally indicated at 30. Each of the improved anvil means 30 comprises a first annular ring 31 concentrically disposed on arbor l8 and keyed there for rotation therewith by a key 33 that extends along the length of arbor 18 and is received in mating keyways 34 and 35 in the arbor l8 and ring 31, respectively A second annular ring 36 having an inside diameter greater than the outside diameter of the first annular ring 31 is concentrically disposed about the first annular ring 31. The width of the second annular ring 36 is less than the width of the first annular ring 31. A continuous annular body 38 of elastomer is disposed between the first and second annular rings 31 and 36, and is bonded to the outside diameter of the first annular ring 31 and the inside diameter of the second annular ring 36. The width of the body of elastomer 38 is no greater than the width of the first annular ring 31. With the second annular ring 36 adhered to the first annular ring 31, it too is rotatable with arbor 18.

A plurality of substantially identical anvil means 30 are similarly mounted axially along arbor 18 for rotation therewith. In the apparatus 10, here illustrated, the anvil means 30 are disposed in side-by-side relation. It will be apparent that if greater spacing is desired, spacer sleeves, such as those disposed between slitting discs 20, may be employed between anvil means 30. The anvil means 30 have a width or are spaced such that at least one slitting disc 20 is disposed in opposed relation thereto, The spacing of the arbors 17 and 18 are adjusted with the cutting edges 21 of the slitting discs 20 in rolling engagement with its associated anvil means 30 such that the anvil means 30 are resiliently held in contact with the slitting discs 20, FIG. 2 and 3. While there is here illustrated only one slitting disc 20 associated with one anvil means 30, additional slitting discs 20 may be associated with a single anvil means. In addition, rather than have the slitting disc 20 bearing in rolling engagement with the outer face of an anvil means 30, the slitting discs 20 may be positioned such that the cutting edges 21 are received between adjacent anvil means 30 in rolling engagement with edges or sides thereof.

As is well known, elastomer when confined is substantially incompressible. However, elastomer is readily subject to displacement. Thus, in order to properly utilize the compressive resilient properties of an elastomer, space for its displacement must be provided. In the anvil means 30 of the present invention, such a free space, referred to hereinafter as bulge free area, is defined between the second rings 36 of adjacent anvil means 30. The bulge free area is material to the proper operation of the anvil means 30 of the present invention. By providing a bulge free area between adjacent anvil means 30, the second annular ring 36, FIG. 3, may be deflected radially inward relative to the first annular ring 36 by its associated slitting disc 20 without affecting the adjacent anvil means 30 since the elastomer body 38 between such first and second annular rings 31 and 36 will be displaced into the bulge free areas defined adjacent thereto. Furthermore, since arbor 17 is normally adjusted by arbor adjustment means 19 with the second rings 36 of anvil means 30 resiliently held by elastomer bodies 38 in contact with their associated slitting discs 20, the second rings 36 will be resiliently biased radially outward relative to the first annular rings 31 should for any reason the load placed thereon or any part thereof by the slitting discs 20 be removed. Thus, during rotation of arbors 17 and 18, the second annular rings 36 will move independently of each other, either radially inward or outward of the first annular rings 31 to accommodate for problems, such as eccentricity of the slitting discs 20 and anvil means 30, variation in diameter between slitting discs 20 or anvil means 30, flexing of the arbors, wear of the slitting discs 20 and anvil means 30, the the like. Without the independent movement of the second annular rings 36 of anvil means 30, it is doubtful that the above problems can be eliminated to insure that each slitting disc 20 is functioning to effect slitting of sheet material S.

With the complete anvil means for the slitting apparatus being composed of a plurality of discrete anvil means 30, it will be understood that should the elastomer body 38 fail or the bonds between the annular rings 31 and 36 fail in any one anvil means 30 such anvil means 30 may be readily removed and replaced. Likewise, should one of the second annular rings 36 become excessively damaged by a slitting disc 20, it can be readily removed and replaced. Thus, repair and maintenance costs and machine downtime are minimized.

In the drawing and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not the purposes of limitation.

What is claimed is:

1. In a slitting apparatus for slitting sheet material,

a pair of parallel rotatable first and second arbors,

a plurality of slitting discs concentrically mounted and spaced axially along said first arbor for rotation therewith,

a plurality of annular rings concentrically disposed axially along said second arbor,

elastomer means disposed and adhered between each of said rings and second arbor and mounting each of said rings for rotation with said second arbor while resiliently holding each of said rings in preloaded rolling engagement with at least one of said plurality of discs, adjacent annular rings and said elastomer means defining a bulge free area between adjacent rings for the displacement of said elastomer means whereby each of said annular rings is capable of resilient movement radially of the axis of said second arbor substantially independent of each other through displacement of said elastomer means into said bulge free areas.

2. In a slitting apparatus for slitting sheet material,

a pair of parallel rotatable first and second arbors,

a plurality of slitting discs concentrically mounted and spaced axially along said first arbor for rotation therewith, each of said discs having a cylindrically periphery defining a circular cutting edge,

a plurality of annular rings concentrically disposed in spaced-apart relation axially along said second arbor,

separate and independent annular elastomer means disposed and bonded between each of said rings and second arbor and mounting each of said rings for rotation with said second arbor while resiliently holding each of said rings in preloaded rolling engagement with the cutting edge of at least one of said plurality of discs, the space between adjacent annular rings defining bulge free areas for the displacement of each of said elastomer means whereby each of said annular rings is capable of resilient movement radially of the axis of said second arbor independently of each other through displacement of said elastomer means into adjacent bulge free areas.

3. In a slitting apparatus for slitting sheet material,

a pair of parallel rotatable first and second arbors,

a plurality of slitting discs concentrically disposed axially along said first arbor,

first key means mounting said discs on said first arbor for rotation therewith,

a plurality of first annular rings having a substantially uniform diameter concentrically disposed in side-by-side relation axially along said second arbor,

second key means mounting said first rings on said second arbor for rotation therewith,

a second annular ring having an inside diameter greater than the outside diameter of said first rings concentrically disposed about each of said first annular rings, said second annular rings having a substantially uniform outside diameter and a width less than the width of their associated first annular ring,

separate and independent annular elastomer means disposed and bonded between each of said first and second annular rings and mounting each of said second annular rings for rotation with said first annular rings and second arbor while resiliently holding each of said second annular rings in preloaded rolling engagement with at least one of said plurality of discs, the space between adjacent annular second rings defining bulge free areas for the displacement of each of said elastomer means whereby each of said second annular rings is capable of resilient movement radially of the axis of said second arbor independently of each other through displacement of said elastomer means into adjacent bulge free areas.

4. In a slitting apparatus, as set forth in claim 3, wherein each of said elastomer means comprises a continuous body of elastomer having a width no greater than the width of its associated first annular ring.

5. Anvil means for use in a slitting apparatus having a pair of parallel rotatable first and second arbors, a plurality of slitting discs concentrically mounted and spaced axially along said first arbor for rotation therewith, said anvil means adapted to be mounted in side-by-side relation axially along the second arbor for rotation therewith with each of said anvil means in rolling engagement with at least one of the slitting discs and compnsmg,

a first annular ring adapted to be concentrically mounted on said second arbor for rotation therewith,

a second annular ring having an inside diameter greater than the outside diameter of said first annular ring concentrically disposed about said first annular ring, said second annular ring having a width less than the width of said first annular ring, and

a continuous annular body of elastomer disposed and bonded between each of said first and second annular rings and having a width no greater than the width of said first annular ring.

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3786623 *Jul 24, 1972Jan 22, 1974Graenges Essem AbMethod and an apparatus for the continuous production of stranded wire
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Classifications
U.S. Classification83/506, 83/659, 83/347, 83/425, 83/665
International ClassificationB26D7/20, B23D19/06, B26D1/22
Cooperative ClassificationB26D1/225, B23D19/06, B26D7/20, B26D2007/202
European ClassificationB26D1/22B, B23D19/06, B26D7/20