US3590453A

US3590453A - Honeycomb roll

Info

Publication number: US3590453A
Application number: US738213A
Authority: US
Inventors: Edward T Bryand
Original assignee: Metal Tech Inc
Current assignee: Metal Tech Inc
Priority date: 1968-06-19
Filing date: 1968-06-19
Publication date: 1971-07-06
Anticipated expiration: 1988-07-06

Abstract

An improved cylindrical suction roll suitable for carrying a foraminous screen thereon for forming paper, said cylindrical roll being of the type formed by alternating straight and undulating strips attached to one another and running axially between end members, and the improvement comprising the projection of said straight strips radially beyond said undulating strips to form unitary, circumferentially spaced, continuous axial supports for outer meshed layers. The projecting straight strips are firmly anchored in the honeycomb openwork of the roll by notching the nodes of the undulated strips and applying fillet welds in the notches to create a countersink, or tapered edge, in the area of attachment.

Description

United States Patent Edward T. Bryand South Portland, Maine [21] Appl. No. 738,213

{22} Filed June 19, 1968 [45] Patented July 6, 1971 [73 l Assignee Metal-Tech, Inc.

Biddeford, Maine [72) Inventor {54} HONEYCOMB ROLL l0 Claims, 6 Drawing Figs.

[52] U.S. Cl 29/121, 210/402 [5l] lnt.Cl D21! 3/10 [50] Field of Search 29/121,

124, 125, 129, 130, 121 A, 123, 148.4, 455; 162/357, 368, 367, 372; 210/402, 403, 404; 161/68,l27,126,l35

[56] References Cited UNITED STATES PATENTS 3,100,928 8/1963 Bryand 29/121 3,105,043 9/1963 Rich et al 162/368 X 3,259,961 7/1966 Bryand 29/l48.4 FOREIGN PATENTS 525,753 5/1955 ltaly 29/455 Primary Examiner-Walter A. Scheel Assistant Examiner-Leon G. Machlin Attorney-Pearson & Pearson ABSTRACT: An improved cylindrical suction roll suitable for carrying a foraminous screen thereon for forming paper, said cylindrical roll being of the type formed by alternating straight and undulating strips attached to one another and running axially between end members, and the improvement comprising the projection of said straight strips radially beyond said undulating strips to fonn unitary, circumferentially spaced, continuous axial supports for outer meshed layers. The projecting straight strips are firmly anchored in the honeycomb openwork of the roll by notching the nodes of the undulated strips and applying fillet welds in the notches to create a countersink, or tapered edge, in the area of attachment.

PATENTEU JUL 61971 snm 1 ur 2 INVENTOR. Edward T. Brycmd BY *p 2 z ,z a n v-P AT TORNEYS PAENEuJuL sien 3590.453

SHEET 2 UF 2 A TTORNEYS HONEYCOMB ROLL BACKGROUND OF THE INVENTION Cylindrical honeycomb and half-hexagonal rolls are known to the art and have gained wide acceptance in a large number of heavy duty applications where a high ratio of strength to open area is desirable, as for example in cylindrical suction rolls and other type of filter support media.

lt has now been discovered that an improvement in such rolls as have been described in U.S. Pat. Nos. 3,100,928 and 3,259,961 issued to Edward T. Bryand allows such apparatus to have unexpected advantages over other types of rolls in such applications as papermaking and the likes, wherein a Fourdrinier wire is trained over a breast roll for passing the paper stock or other composition through a dewatering action.

For example, in U.S. Pat. No. 2,418,600 to Ostertag et al., of Apr. 8, 1947, a breast roll is disclosed which comprises a relatively thick walled hollow roll having countersunk drilled perforations, axially milled grooves, projecting axial blades seated in the grooves, notches in the blades, continuous circumferential steel tapes yet in the notches and an overall cover of heavy screen mesh, all for supporting a Fourdrinier wire. lt will be understood that such a structure is costly to assemble, subject to inadvertent displacement of the parts and constitutes a considerable barrier to the passage of liquid into the interior of the roll and to the application of suction from the roll interior to the liquid in the outer periphery ofthe roll.

In the device of this invention, the roll is a unitary hollow cylindrical honeycomb openwork formed of alternate straight and undulated thin strips of metal extending axially from one end support to the other. The straight strips extend outwardly beyond the undulated strips to also form axial blades, or baffles, which cannot become displaced because welded into the openwork. The outer extremities of the straight strips may be notches to receive the conventional stainless steel tapes for supporting thy conventional meshed outer layer, or a layer of thin honeycomb openwork may be supported on the straight strips for the same purpose.

By honeycombed rolls as used hereafter in this specification is meant any roll of the general type described in the aforementioned U.S. Pat. No. 3,259,961, wherein undulated strips are spaced by straight strips. Said undulated strips include half-hexagonal bent strips or any of the functional equivalents thereof.

SUMMARY OF THE INVENTION Therefore it is an object of the invention to provide an improved breast roll suitable for supporting a Fourdrinier wire during papermaking.

It is another object of the invention to provide an improved suction or dewatering roll for use in conjunction with a head box.

Another object of the invention is to provide an improved honeycomb roll.

Still another object of the invention is to provide a novel means of forming a breast roll whereby weight savings, economy, and increased flow through are achieved without shortening the effective life of the papermaking apparatus or losing any performance characteristics thereof.

AN ILLUSTRATIVE EMBODIMENT OF THE INVENTION FIG. l is a front elevation, partly in section, of a cylindrical roll constructed in accordance with the invention;

FIG. 2 is a fragmentary enlarged perspective section of the honeycomb structure according to the invention, slotted for supporting tapes;

FIG. 3 is a fragmentary enlarged plan view of the structure` shown in FIG. I;

FIG. 4 is a view along the section line 4-4 of FIG. l, showing the roll of the invention in use as a breast roll in a Fourdriniertype paper machine;

FIG. 5 is a perspective view of another embodiment of the invention; and

FIG. 6 is a perspective view of still another embodiment of thy invention. Referring to FIG. I, it is seen that a cylindrical roll l5 includes a pair of oppositely disposed, parallel, longitudinally spaced, circular end members I6 and 17, with the hollow, cylindrical, honeycomb openwork I8 extending therebetween. Each end member is preferably supported on a stationary hollow bearing journal 19 by means of a bearing plate 20 and bearing 21, the hollow journal forming a fluid conduit 22 connecting the interior of the roll to a source of suction 23. Each end member also includes an annular, peripheral inner face such as 25 or 26, the

faces

25 and 26 preferably being flat, smooth, and normal to the longitudinal axis of the roll. The end members are slotted and are, con veniently, in the form of circular flanged rings 27 detachably secured to bearing plates 20.

The hollow cylindrical honeycomb openwork 18 has a generally cylindrical outer face 28 and cylindrical inner face 29 and is formed of thin metal strips of stainless steel, said strips upstanding on edge and bent to form radially extending flow passages into the interior of the roll. Openwork 18 consists of a plurality of alternate straight strips such as 31, 32 and 33 and undulated, sinuate or half-hexagonally bent strips 34 and 3S, the strips extending axially from the inner face 25 of one end member to the opposite inner face 26 of the other end member. The terms undulate and sinuate are used herein to include half hexagonal bent strips, or any equivalent configuration which will produce a useful pattern of flow passages, a useful embossing pattern or the like.

The preferred configuration, however, is that wherein

nodes

36 and 37 of adjacent bent strips are oppositely disposed to form a series of honeycomb-shaped conduits split by a straight strip such as 32.

It is the particular relationship of the straight strip 32 to the bent strips such as 34 and 35 which constitute a major improvement of the invention. A complementary improvement is the configuration of the bent strips such as 35 and the means by which they are attached to straight strips.

Referring to FIGS. 2 and 3, it is seen that straight strips such as 31 are elevated above bent strips such as 34 by an altitude 38 which is preferably less than the altitude 40 of that portion of strips such as 31 which are in contact with bent strips such as 34.

As shown schematically in FIGS. 2 and 4, the upper edge portion 42 of strip 32 provides means for supporting a foraminous assembly 43 which may include circumferential steel tapes 44, seated in notches 45, a meshed screen 46, and a Fourdrinier wire 47.

It is also to be noted that nodes such as 36 of bent strips 34 are partly cut out as at 50. These cutouts 50 may be punched or drilled in circular configuration, and provide means for securing bent strips such as 34 to straight strips such as 32 without the necessity of having three thicknesses of metal at the points of attachment of nodes 36 to straight strips such as 32. A countersunk shaped tapered fillet 51 is welded, brazed, or otherwise applied within each cutout 50. Apparatus thus formed is easier to clean, and provides less resistance to airflow. Moreover, its fabrication is facilitated by the extra work room and weld area provided by cutouts 50 for the artisan to manipulate during anchoring of nodes 36 to straight strips such as 32.

The honeycomb roll 15 with its radially projecting strips, or baffles, 3l, 32 and 33, firmly anchored within, and integral with the honeycomb openwork by the weld fillets 51 in cutouts 50 of the recessed undulated

strips

34 and 35, forms a series of full axial length, continuous liquid chambers 52 around the periphery of the roll in the plane of the projecting portions 38 of the straight strips. Unlike breast rolls of the prior art, in which the bottom, or inner wall of such chambers is formed by a solid roll surface having countersunk drilled suction holes, the bottom, or inner wall 53 of roll l5 is substantially open and permits free passage of fluid from the chambers 52 into the interior 54 of the roll. At the only locations where three strip thicknesses are joined, the outer edges thereof are tapered or beveled by the fillets 5l to constitute a single-thickness pointed edge, thereby increasing flow-through while avoiding a wide shelf effect upon which fibers in paper stock could lodge and accumulate.

As shown in FlG. 5, the outer edges 42 of the projecting straight strips 3l and 32 may be free of notches and support a suitable screen 46, and such a screen may be formed by a thin covering of honeycombed stainless steel strips 60, one-eighth inch thick or more, and constructed in the manner illustrated herein. ln such case, the thin honeycomb covering is inverted so that the projecting portion 6l ofthe straight strips 62 are on the inside for attachment by welding, brazing as at 63 or by other means, on the projecting portions 38 of the straight strips of the inner openwork.

As shown in FlG. 6, the outer covering 60 can be circumferentially constructed with the straight strips 66 running circumferentially, or slightly helically, to seat the projections 67 thereof in notches such as 45.

For convenience of illustration, the openworks of FIGS. 5 and 6 are flat planar, but it will be understood that, in forming a roll, the openworks are in curved planes.

What l claim is:

1. ln a rotary cylindrical roll of the type comprising a pair of spaced-apart, parallel, circular end members each having an annular peripheral inner face and a plurality of alternate straight strips and bent strips, extending axially between and spaced around, the said annular, inner faces of said members to form a cylindrical openwork, said bent strips each having uniformly spaced, flattened nodes in engagement with straight strips on each side thereof; and means connecting each said node to the adjacent straight strip for mutual support of said strips,

the improvement whereby said straight strips extend radially beyond said bent strips, around said roll.

2. Apparatus as defined in claim l wherein the length of radial extension of said straight strips above said quantitative bent strips is less than the radial distance of said straight strips which is adjacent to said bent strips.

3. Apparatus as defined in claim l wherein circumferentially adjacent ones of said bent strips are oppositely disposed to form a honeycombed-type openwork.

4. Apparatus as defined in claim l wherein a portion of said nodes are cut out from at least the outer edges thereof and said connecting means is a fillet weld partially filling said cutout to form a tapered face, thereby providing an improved fluid flow through the apparatus.

5. A honeycomb roll of the type having alternate straight and undulated thin strips extending axially from one end ofthe roll to the other end to define a half hexagonal patterned openwork characterized by each said straight strip extending radially outward substantially beyond the cylindrical plane defined by said undulated strips, and anchoring means, in the said cylindrical plane of said undulated strips, securing said strips to the adjacent portions of said straight strips to form a unitary, integral openwork. 6. A roll as specified in claim 5, wherein each said straight strip includes a plurality of spaced notches therealong for receiving and supporting the convolutions of circumferentially extending metal tapes, or strips. 7. A roll as specified in claim 5, plus a hollow cylindrical, foraminous assembly, supported on the outer terminal edge portions of said straight strips, said assembly being adapted to support a Fourdrinier wire trained partially therearound. 8. A roll as specified in claim 5, wherein said anchoring means comprises a plurality of cutouts, formed in at least thc outer edge of each node of said un dulates strips, and a fillet weld extending around the periphery of each cutout and securing each said node to the face of the adjacent straight strip. 9. A roll as specified in claim 8, wherein said fillet weld is beveled to form a sloping, outward-facing edge on each said cutout. l0. A honeycomb roll of the type having alternate straight and undulated thin strips extending from one end of the roll to the other end to define a half hexagonal patterned openwork, said roll being characterized by an inner said openwork on said roll, said inner openwork having a plurality of said straight strips spaced therearound and extending radially outward substantially beyond the cylindrical plane defined by the said undulated strips thereof; said inner openwork forming a re|atively strong, coarse-apertured support; an outer said openwork encircling said inner openwork and supported thereby, said outer openwork having a plurality of said straight strips and undulated strips the said straight strips being spaced therearound and extending radially inward substantially beyond the cylindrical plane defined by the said undulated strips, said outer openwork forming a relatively thin, fine-apertured screen; and means for firmly anchoring the inwardly projecting portions of the said straight strips of said outer openwork to the outwardly projecting portions of said straight strips of said inner openwork to f'orm a unitary composite honeycomb roll.

Claims

1. In a rotary cylindrical roll of the type comprising a pair of spaced-apart, parallel, circular end members each having an annular peripheral inner face and a plurality of alternate straight strips and bent strips, extending axially between and spaced around, the said annular, inner faces of said members to form a cylindrical openwork, said bent strips each having uniformly spaced, flattened nodes in engagement with straight strips on each side thereof; and means connecting each said node to the adjacent straight strip for mutual support of said strips, the improvement whereby said straight strips extend radially beyond said bent strips, around said roll.

2. Apparatus as defined in claim 1 wherein the length of radial extension of said straight strips above said quantitative bent strips is less than the radial distance of said straight strips which is adjacent to said bent strips.

3. Apparatus as defined in claim 1 wherein circumferentially adjacent ones of said bent strips are oppositely disposed to form a honeycombed-type openwork.

4. Apparatus as defined in claim 1 wherein a portion of said nodes are cut out from at least the outer edges thereof and said connecting means is a fillet weld partially filling said cutout to form a tapered face, thereby providing an improved fluid flow through the apparatus.

5. A honeycomb roll of the type having alternate straight and undulated thin strips extending axially from one end of the roll to the other end to define a half hexagonal patterned openwork characterized by each said straight strip extending radially outward substantially beyond the cylindrical plane defined by said undulated strips, and anchoring means, in the said cylindrical plane of said undulated strips, securing said strips to the adjacent portions of said straight strips to form a unitary, integral openwork.

6. A roll as specified in claim 5, wherein each said straight strip includes a plurality of spaced notches therealong for receiving and supporting the convolutions of circumferentially extending metal tapes, or strips.

7. A roll as specified in claim 5, plus a hollow cylindrical, foraminous assembly, supported on the outer terminal edge portions of said straight strips, said assembly being adapted to support a Fourdrinier wire trained partially therearound.

8. A roll as specified in claim 5, wherein said anchoring means comprises a plurality of cutouts, formed in at least the outer edge of each node of said undulates strips, and a fillet weld extending around the periphery of each cutout and securing each said node to the face of the adjacent straight strip.

9. A roll as specified in claim 8, wherein said fillet weld is beveled to form a sloping, outward-facing edge on each said cutout.

10. A honeycomb roll of the type having alternate straight and undulated thin strips extending from one end of the roll to the other end to define a half hexagonal patterned openwork, said roll being characterized by an inner said openwork on said roll, said inner openwork having a plurality of said straight strips spaced therearound and extending radially outward substantially beyond the cylindrical plane defined by the said undulated strips thereof; said inner openwork forming a relatively strong, coarse-apertured support; an outer said openwork encircling said inner openwork and supported thereby, said outer openwork having a plurality of said straight strips and undulated strips the said straight strips being spaced therearound and extending radially inward substantially beyond the cylindrical plane defined by the said undulated strips, said outer openwork forming a relatively thin, fine-apertured screen; and means for firmly anchoring the inwardly projecting portions of the said straight strips of said outer openwork to the outwardly projecting portions of said straight strips of said inner openwork to form a unitary composite honeycomb roll.