Untitled record

Application filed April 25,1891. Serial No. 390,486. (No model.)

To all whom it may concern:

Be it known that I, Herbert. J. Frink, of %°ke, i^u the county of Hampden and State ot Massachusetts, have invented a new and 5 useful Improvement in Calender-Rolls, of which the following is a specification, referencebeing had to the accompanying drawings, forming part thereof.

This invention has for its object the eoni° struction of a roll for calendering paper and other fabrics, and relates particularly to that class of rolls composed of a metallic arbor and a homogeneous outer covering or cylinder of fibrous material.

. In accordance therewith my invention consists in a calender roll, consisting of an arbor, a series of separated rings embracing said, arbor at intervals between its ends and having a spline and groove connection there20 with, the parallel surfaces of said rings having irregular projections thereon, a homogeneous outer covering of fibrous material surrounding said arbor from end to end wholly inclosing said rings and extending inward be25 tween them, and two heads secured upon said arbor at each end of and to compress said outer covering, said heads each having in their inner sides a depression corresponding in diameter substantially with that of said 30 rings, substantially as will be described.

Other features of my invention will be hereinafter described and particularly pointed out in the claim.

Referring to the drawings, in which like let35 ters designate like parts in the several figures, Figure 1 is a longitudinal sectional view of a calender roll embodying my invention, the arbor being shown in elevation. Fig. 2 is a similar view thereof taken in a plane perpen40 dieular tothatshown in Fig. 1. Fig. 3 is apian view of a locking ring to be described. Fig. 4 is a cross section thereof on the line x—x, Fig. 3. Fig. 5 is a cross section taken on the line y—y, Fig. 3, and Figs. 6, 7 and 8 are plan 45 andsectional views of a modified form of ring to be referred to.

Referring to Figs. 1 and 2,1 have herein shown the roll as composed of a metallic arbor a surrounded by a homogeneous outer cov50 ering or cylinder b of compressed cotton or other suitable fibrous material, metallic heads

C, C, being secured to the arbor at each end of theouter covering. In the manufacture of such rolls the fibrous outer covering is subjected to great pressure, in a direction paral- 55 lei with the axis of the arbor, and in order to secure the heads C upon the arbor in such manner as to withstand the expansive action of said covering,! have herein shown at each end of the arbor, beyond the outer covering, 60 a frusto-conieal hub a’ upon which are placed similarly shaped rings O'to enter the conical bore of the heads C, as clearly shown in Figs.

and 2, the outer ends of said rings C' being engaged by collars C³ shrunk upon the arbor 65 and thereby securely held in place. So far as this invention is concerned, however, any other usual means employed for holding the device upon the arbor can be utilized. The end pressure exerted by the heads upon the 70 outer covering b is not sufficient to prevent it from turning bodily upon the arbor or having a twisting movement thereon unless other means are provided, particularly in the case of the rolls in calendering machines where 75 they are subjected to great strain in performing their function, the covering tending to turn or twist upon the arbor, and when this occurs the roll is rendered useless. I have herein shown convenient means for so lock- 80 ing the said covering to the arbor that turning or twisting thereof on the arbor is rendered absolutely impossible. In order to accomplish this result I place a series of separated rings or disks d upon the arbor at in- 85 tervals between the heads C, and the said rings are securely locked both to the arbor and to the covering, which latter wholly incloses said rings and extends inward between them, as clearly shown in Figs. 1 and 2. 90

Referring to Figs. 3, 4 and 5, the ring d is shown as composed of a flat piece of metal stamped or otherwise formed into annular shape, the central opening therein being of such a diameter as to cause it to closely fit 95 upon the arbor a. The periphery of the ring is preferably beveled to an edge, as shown in Figs. 1 to 4 and 6, and one or both of its parallel surfaces are pricked or burred to form irregular projections thereon which engage ico the fibrous material of the outer covering b when the latter is compressed upon the ring,

511,606 thus locking the outer covering and the rings securely together. To prevent rotation of the ring upon the arbor 2, inwardly projecting lugs b' are secured to or form a part of 5 the ring at opposite sides of the central opening, and said lugs are adapted to be received within longitudinal grooves a² in the arbor.

In the modification shown in Figs. 6, 7 and 8, the locking ring has a serrated periphery io to cause it to take a firm hold of the fibrous outer covering, and it is provided with notches or recesses d² to receive a spline formed upon or secured to the arbor to lock it thereon.

In practice I prefer to utilize a series of 15 locking rings d located at intervals of several inches upon the arbor, as shown in Figs. 1 and 2, the outer diameter of said rings being substantially two-thirds that of the outer covering b, as shown. The rings are applied 20 successively to the arbor between layers or “ cheeses ” of the fibrous material as the latter is built up upon the arbor, and the pressure exerted upon the said material causes the outer portion thereof beyond the periphery 25 of the ring to completely inclose the latter in such manner as to present an unbroken surface at the periphery of the completed roll. To compensate for the space occupied by the rings and to cause the restraining pressure 30 exerted by the heads C, C, to be evenly distributed throughout the entire cross-sectional area of the outer covering b, I provide said heads with a depression C^x upon their inner sides, as clearly shown in Figs. 1 and 2, the diameter of said depression corresponding 35 substantially with that displaced by the rings.

By constructing the roll as hereinbefore described its even balance upon its axis is preserved and an extended area of the fibrous material is engaged by the locking rings. 4.0

A roll constructed in accordance with my invention as herein described is not materially increased in cost, and it is impossible to turn or twist the outer covering thereof upon the arbor under any circumstances, so that the 45 capability and durability of the roll are materially increased.