US2482712A - Beater roll - Google Patents

Description

D. E. JONES BEATER ROLL Sept. 20, 1949.

3 Sheets-Sheet 1 Filed Sept. 27, 1945 INVENTOR- flI'%Z1Z. J 5.

D. E. JONES BEATER ROLL Sept. 20, 1949.

5 Sheets-Sheet 2 Filed Sept. 27, 1945 j MgYENTOR. BlyZf/Z 02%.

Sept. 20, 1949. JONES 2,482,712

BEATER ROLL Filed Sept. 27, 1945 3 Sheets-Sheet 5 IN V EN TOR.

m a? d Patented Sept. '20, 1949 nm'ran aou.

Dwight E. Jones,

E. D. Jones & Sons Company,

Pittslield, Man. minor to Pittaileld. Mal

a corporation of Massachusetts Application September 27, 1945. Serial No. 618,915 3 Claim. (CL 92-22) 1 This invention relates to improvements in roll construction and is directed more particularly to improvements in the construction of rolls for use in paper-making apparatus such as heaters or the'like, wherein a member having longitur dinal knives or cutting bars is rotatable-relative to and coacts with stationary bars. I

A roll such as is used in the beater includes a body in the form of a cylinder which carries on its periphery and extending radially outwardly, a series of spaced knives, cuts or blades, hereinafter referred to as bars. These bars are carried by the roll so as to work paper stuff against stationary plates commonly referred to as bed plates. It is essential that the bars of the beater roll be held very rigid as integral parts of the roll, so that they may not be dislodged or worked loose so that they fly out. and will not vibratein their holding sockets.

According to the prior art there are two general methods used extensively in beater roll construction. The most common practice is to mount two or more discs or heads upon a shaft and cut slots in the periphery of these heads which are adapted to receive the required number of knives. These knives are made with openings at each end and receive a hoop or band which is usually shrunk in place to hold the bars tight. The spaces between the bars and the heads are filled with wood part way up the bar. The woods serve to seal the roll against entry of water, and in swelling when wet they press tightly against the sides of the bars to give the bars additional support.

One modification of this practice is to use intermediate heads with hoops pre-shrunk in place, and knives cut with corresponding bayonet slots for driving under these hoops. This modification may increase the radial holding power, which is necessary for rolls of wide face, required to work upon hard stocks. Another modification is to hold the bars inplace with lugs which are secured to the heads by means of cap screws or bolts. Basically, however, the construction is the same, the bars being set in slots in the supporting heads but since there are variations in machining the slots and variations in the thickness of the knives, it is very rare that the knives fit tightly in the heads. This type of construction depends upon the bands or hoops and the woods to hold .the knives tight but in time these elements give way and the knives become loose.

Another practice is to hold the bars in the beater roll heads with wedges. The heads are cast with slots which are larger at the base than at the periphery of the roll and they also taper lengthwise of the knives. The knives in this construction are rolled with a heavy rib on their inner edge so that when the wedge is driven into the slot in the roll it forcesthe bar tight against one side and towards the inner seat of the head. The tighter the wedge the more secure the bar. The spaces between the heads and the bars up to within a predetermined distance of the working edge, are filled with woods just as in the banded construction described above, but in this construction the woods serve merely to seal the roll against entry of water and the woods do not hold the bars tight.

This construction does present other objections and disadvantages.

Because the slots in the roll heads which receive the bars are tapered inwardly and lengthwise, it is difficult to machine them, hence for reasons of economy the heads'are cast with said slots. This practice results in variations in the slots and their spacing and in the alignment of the slots in final assembly with respect to one head and the next, so that the bars when placed in position must be forced to conform to this distortion which in turn makes it difllcult, if not impossible, to fit the woods properly.

Where the slots are cast in the roll they do not provide complete contact for either the wedges or the bars, hence, when the wedges are driven in tightly they and the bars contact a series of high points for which reason the bars are not held as securely as desired.

Since the slots toward the center of the roll than at the periphery, the partitions or portions of the roll between the bottoms of the slots is of minimum thickness nearest the center. This places a physical limit on the closeness which the bars may be spaced, and generally it is not possible to locate the bars closer together than 2 /2" center to center. v

Also this construction involves the use of 'bars of special cross-section which must be rolled speciflcally for the purpose with a rib that will butt hard against the tapered wedge.

The principal objects ofthis invention-are to overcome the above and other objections and disadvantages and to provide anovel roll "construction that is economical to manufacture and emcient in operation;

According to this invention, a hollow cast drum is provided which is of the desired weight and it is fixed to a shaft. A series of heads fixed to in this construction are wider means a shaft may be employed in lieu thereof but a drum is preferred since it is of simple construction and water tight.

A plurality of accurately machined rings are shrunk onto axially spaced seats which are machined on the drum so as to be fixed thereto.

Prior to assembly, the rings are provided 'with-' peripherally and-equally spaced radially extending bar receiving slots which have parallel opposite sides. Preferably the rings for a roll are simultaneously slotted so as to insure accurate slot dimensions and proper alignment of the bar slots when the rings are fixed on the drum. The bars employed are of rectangular cross section having parallel side faces and are to be side faces for abutting the opposite side faces ofthe slots have inner side faces which are complemental to the diverging faces of the inner wedges and are inserted between the inner wedges and opposite side faces of the slots. These wedges are driven inwardly of the slots and radially of the roll so that by a wedging action the bars through the key connections are forced inwardly of the slots and radially of the roll and made in the formof the invention without departing from the spirit and scope thereof and the various novel objects and advantages of the invention will be hereinafter more fully referred to in connectionwith the following description of the preferred form of the invention taken in connection with the drawings, wherein:

.Fig. 1 is" -a. partial elevational and sectional view of a beater roll embodying the novel features of the invention;

Fig. 2 is a sectional view Fig. 1;

Fig. 3 is a partial side elevational view of one of the slotted rings of the roll construction of the invention;

Fig. 4 is a sectional elevational view on the line on-the line 2-: of

4-4 of Fig. 1; n

Fig. 5 is a sectional elevational view on the line 5- -5 of Fig. 1;

Figs. 6 to 10. inc. are views similar showing modified forms of the invention;

Fig. 11 is a sectional view on the line ilii of Fig. 8; and

Fig. 12 is an end elevational view of a bar and inner wedge to illustrate'a modified form of the invention. 1

Referring now to the drawing more in detail.

the invention will be fully described.

InFig. 1, there is shown a hollow roll body I for a beater which has a shaft] fixed thereto.

, Longitudinally spaced circumferential bands or against a side and bottom of their respective slots. The outer wedges are fixed in their wedging positions by novel means and any tendency of the wedges to move outwardly of their slots and radially of the roll brings about an increased wedging action. The wedges are made so as to not bottom in the slots while the inner edges of the bars are forced against the bottoms of their slots. i

The bars and wedges may be produced economically and accurately by various well known manufacturing operations and in conjunction with accurately machined bar slots in the rings the'bars arerigidly fixed therein.

The spaces between the bars and rings up to a desired distance from the working edges of the bars may be filled with woods or plastic material which provide pockets between the bars of predetermined size while the woods as they become wet may swell into the key-sways of the bars which serves as anchoring means.

Because of. the parallel sided straight slots which extend radially of the roll, the spacing of the bars may be at a minimum and much less spacing than with prior art constructions. The components may be accurately produced in an economical manner and in such a way as to pro vide the utmost accuracy and resulting rigidity between the bars and roll and overcome the ob- Jections and disadvantages of prior art construc tions.

While the invention will be described in connection with a roll for a beater, it will be appreciated that the novel features thereof are adapted for general use. Where reference is made torolls it will be understood that the term includes a rotatable element such as a beater roll, or other member having peripherally-spaced longitudinally-extending cutters, bars, blades or knives.

Various chan es and modifications may be rings 8 are provided which are shrunk onto seats turned on the body and these rings are provided with circumferentially spaced straight parallel sided radially extending slots 0 for receiving longitudinally extending cutting bars, such as II.

The seats onthe body for the rings are mechined for a shrink fit so that the rings when shrunk thereon are rigidly fixed and the slots of the rings are formed by such a machining operation as will provide perfectly aligned slots with respect to adjacent rings.

According to the invention, the cutters. bars, blades or knives are secured to the bands or rings in a novel manner. To facilitate a clear understanding the cutters, bars. blades or knives will be hereinafter referred to as bars and the bands, rings, or equivalent parts will be referred to as rings whether secured to an integral body or secured to separate body forming members which are secured to a shaft.

In Figs. 1, 2 and 4 the bars are repruented by II and are in place in theirslots in the rings. It will be understood that the spaces between the bars Il may be filled up to a desired or predetermined point relative to the outer working faces of the bars with various materials such as wood. metal, plastics, or the like indicated by if in l'ig. 4. The novel means for securing the bars in the rings maybe used in connection with each one of the bars and rings and therefore descriptions of the invention in connection with one of the rings will sumce for purposes of disclosure.

With reference to Figs. .5 to 10 inc., the rings I, as described, are provided with straight sided or parallel sided slots I which preferably extend radially of the. roll body. In-the slots the bars II are seated and the inner faces thereof have longitudinal grooves or key-ways M which receive projections or keys ll of inner wedges ll. Outer wedges 20 between the wedges II and opposite side faces of the slots are urged, pressed or driven downwardly or inwardly and radially by some suitable means or in any convenient manner so that as the wedges are forced downwardly to m. s

- mesa-us the bars II and wedges I. are made tight in the slots. That is. by the wedging action the bars are bottomed in their slots and held rigidly by the wedges.

The wedges may lation by various means, be described.

As an example, as in Fig. one or more screws or bolts 30 in threaded engagement with the ring 8 has a head portion 32 which bears on the outer wedge to force it downwardly for its wedging and locking action and to hold the same in wedging position.

In Fig. 6, the ring ferential groove in which is receivable a projection or tongue 38 of an outer wedge 40. When the wedge 40 has been forced downwardly the groove 36 is filled with metal or the like to lock the wedge in its wedging position.

According to in Fig. 7, an outer wedge it has an ear it which overlies an adjacent portion of ring 6 and a screw 48 is provided which threadedly engages the ring for locking said wedge in its wedgln'g position.

In the form of the invention shown in Figs. 8 and 11, the ring 6 is provided with a circumferential groove 50 preferably of dove-tail formation, as shown. An outer wedge 52 is provided with a recess or socket 54 which is more or less in alignment with the groove of the ring. When the wedge has been pressed downwardly or inwardly, the groove and recess are filled with some suitable material indicated by 56. Said material maybe molten metal or the like which when hardened will hold and lock the wedge in place.

As in Fig. 9, an outer wedge is held in wedging position by welding by 62. The welding may be accomplished in various ways and adjacent portions of the wedge and ring may be formed as desired in order to obtain themost efficient securement.

In Fig. 10 an outer wedge I0 and an adjacent side of the slot 8 are provided with a hole when the wedge has been forced to wedging position. The hole may be formed by a drilling operation or the like so that a substantial half-hole is provided in adjacent faces of the wedge and slot in the ring. A pin or dowel I2 is driven into the hole and thereby the wedge is held in wedging position.

Instead of the key and key-way construction shown and described in connection with Figs. 5 to 10 inclusive, the bar II and outer wedge l9 may be provided with a semi-circular key-way be locked in their wedging resome of which will now and key 2| and 23, or the said key and key-way may take any other form desired.

From the foregoing it will be observed that in each case the bars are securely wedged in their slots of the rings and are held in the desired position so as to provide a strong, rigid constructhe form of the invention shown 6 is provided with a clrcumlongitudinal center lines planes parallel to and extending through the 1011- Y gitudinal axis of the body,

What it is desired to claim and secure by Let ters Patent of the United States is:

. 1. A roll construction comprising in combination, a cylindrical unitary roll body, axially spaced circumferentially extending rings fixed to the periphery of said body provided with circumferentially spaced bar slots with the slots of said rings in alignment longitudinally of the body and disposed radially of the longitudinal axis of the body, said slots having parallel spaced apart flat faces and extending radially of the body with of said slots disposed in longitudinally extending bars in said slots having flat parallel outer and inner side faces with said outer faces conti uous with one face of said slots, the'inner faces of said bars provided with keyways extending longitudinally thereof, inner and outer wedges constituting pairs thereof between inner faces of said bars and other side faces of said slots, said inner wedges having outer faces contiguous with the inner faces of the bars and provided with keys in the keyways of the bars and inner faces diverging relative to said outer faces from outer 1 longitudinal edges thereof inwardly of said slots and radially of said roll, said outer wedges having outer faces contiguous with the other side faces. of the slots and inner faces complemental to the inner faces of the inner wedges and converging relative to said outer faces from outer to the ring 6 as indicated iii tion. The assembly of the parts is facilitated by the ease and readiness while at the same time the construction lends itself to economical manufacture. The slots of the rings having straight parallel sides the spacing of the bars may be at a desired minimum and the components are made from ordinary and readily obtainable materials as distinguished from special shapes.

The invention may be embodied in other speciflc forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claims rather than by longitudinal edges inwardly of said slots and radially of said roll, said outer wedges adapted for movement inwardly of said slots and radially of the roll into wedging position for a wedging action on the inner wedges and bars to hold the same against outward radial movement, and securing means at outer sides of the slots adjacent the outer faces thereof engaging said rings and outer wedges to hold said outer wedges in wedging position and against outward radial movements.

2. A roll construction comprising in combination, a cylindrical unitary roll body, axially spaced circumferentially extending rings fixed to the periphery of said bodyprovided with circumferentially spaced bar slots with the slots of said rings in alignment longitudinally of the body and disposed radially of the longitudinal axis of the body, said slots having parallel spaced apart flat faces and extending radially of the body with longitudinal center lines of said slots disposed in planes parallel to and extending through the longitudinal axis of the body, longitudinally extending bars in -said slots having flat parallel outer and inner side faces with said outer faces contiguous with one face of said slots, the inner faces of said bars provided with keyways extending longitudinally thereof, inner and outer wedges constituting pairs thereof between inner faces of said bars and other side faces of said slots, said inner wedges having outer faces contiguous with the inner faces of the bars and provided with keys in the keyways of the bars and inner faces diverging relative to said outer faces from outer longitudinal edges thereof inwardly of said slots and radially of said roll, said outer wedges having outer faces contiguous with the other side faces of the slots and inner faces complemental to the inner faces of the inner wedges and converging relative to said outer faces from outer longitudinal edges inwardly of said slots and radially of said roll, said outer wedges adapted for movement inwardly of said slots and radially of the rollinto wedging position for a wedging ac-' tion on the inner wedges and bars to hold the same against outward radial movement, and securing means at outer sides of the slots adjacent the outer faces thereof engaging said rings and outer wedges to hold said outer wedges in wedging position and against outward radial movements, and filler members between said bars having upper faces disposed below outer longitudinal edges thereof and lower faces provided with notches in which said rings are disposed.

3. A roll construction comprising in combination, a cylindrical unitary roll body, axially spaced circumferentially extending rings fixed to the periphery of said body provided with circumferentially spaced bar slots with the slots of said rings in alignment longitudinally of the body,

1 said slots having parallel spaced'apart flat faces and extending radially of the body with longitudinal center lines of said slots disposed in planes parallel to and extending through the longitudinal axis of the body, longitudinally extending bars in said slots having flat parallel outer and inner side faces with said outer faces contiguous with'one face of said slots, the inner faces of said bars provided with keyways extending longitudinally thereof, inner and outer wedges constituting' pairs thereof between inner faces of said bars and other side faces of said slots, said inner wedges having outer faces contiguous with the inner faces of the bars and provided with keys in the keyways of the bars and inner faces diverging relative to saidouter faces from outer longimeans I V 8 tudlnal edges thereof inwardly of said slots and radially of said roll, said outer wedges having outer faces contiguous with the other side faces of the slots and inner faces complemental to the inner faces of the inner wedges and converging relative to said outer faces from outer longitudinal edges inwardly of said slots and radially of said roll, said outer wedges adapted for movement inwardly of said slots and radially of the roll into wedging position for awedging action on the. inner wedges and bars to hold the same against outward radial movement, and securing means at outer sides of the slots adjacent the out-, er faces thereof engaging said rings and outer wedges to hold said outer wedges in wedging position and against outward radial movements, said securing means including screw members threadedly engaging said rings provided with beads engaging upper longitudinal edges of the outer wedges.

. DWIGHT a. some.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED s'ra'ras PATENTS McLean Apr. 13, 1937

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