US2586634A

US2586634A - Pulp insulating machine

Info

Publication number: US2586634A
Application number: US741922A
Authority: US
Inventors: Waldemar C Ewaldson; John N Selvig
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1947-04-16
Filing date: 1947-04-16
Publication date: 1952-02-19
Anticipated expiration: 1969-02-19

Description

Feb. 19, 1952 w. c. EWALDSON ETAL PULP INSULATING MACHINE 4 Sheets-Sheet 1 Filed April 16, 1947 INVENTORS m' c. emu osolv J. 1v. s51. we

A T TORNEY Feb. 19, 1952 w. c. EWALDSON ETAL 2,586,634

PULP INSULATING MACHINE Filed April 16, 1947 4 Sheets-Sheet z INVENTORS WJLEWALDSOIV J.IV.$ELVI6 A 7' TORNEV Fb. 19, 1952 w, c, w L so ETAL 2,586,634

PULP INSULATING MACHINE Filed April 16, 1947 4 Sheets-Sheet 5 INVENTORS W. C. EWALDSON J. N. 551. we 8! W. C. EWALDSON EI'AL Feb. 19, 1952 PULP INSULATING MACHINE 4 Sheets-Sheet 4 Filed April 16, 1947 INVENTORS WJLEWALDSON J.N.SELV/G A TTORNEV Patented Feb. 19, 1952 UNITED STATE S PATENT OFFICE PULP INSULATING MACHINE Application April 16, 1947, Serial No. 741,922

- 6 Claims. 1

This invention relates to pulp insulating machines, and more particularly to machines for forming insulating coverings of pulpous material on electrical conductors.

In insulating machines for forming insulating coverings of pulpous material on electrical conductors while they advance longitudinally through the machine, the material is fed continuously to a Fourdrinier wire of the continuous type while the upper portion of the wire, which receives the material, travels in a plane parallel with a plane through which the electrical conductors are advanced. A suction box is positioned beneath the upper portion of the wire to draw the major portion of the liquid or water from the material leaving a covering on the conductors. To facilitate in the formation of individual ribbons of the material on the individual conductors, deckles, providing individual channels for the conductors and for the material from which the individual ribbons are formed, are positioned above the upper portion of the wire leading away from the entrance end thereof where the material is initially applied to the wire.

An object of the invention is to provide a member, in pulp insulating machines for insulating electrical conductors, which embodies a press roll adjustable axially relative to the plane through which the conductors travel and vertically relative to this plane to control the formation of the pulpous material about the conductor.

A further object of the invention is to provide a tiltable frame to support the press roll as well as the deckles relative to the pi me of the conductors between an operating position and a loading position.

With these and other objects in view, the invention is embodied in a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in a given direction 7 with electrical conductors to be covered with pulpous material fed to the wire and relative to a suction box positioned beneath the upper portion of the wire to draw water from the material as it travels with the wire and the conductors. Within this structure, the invention comprises a frame supported above the upper portion of the wire fora shaft which rotatably supports a press roll positioned adjacent the exit end of the upper portion of the wire. The shaft has elements mounted thereon, carried by the frame and movable therein to vary the position of the press roll relative to the upper portion of the wire to press excess water from the material covering the conductors. The elements mounted on the shaft of the press roll are circular in cross-section and are disposed in aligned circular openings of the frame, the elements being mounted eccentrically on their spaced portions of the shaft. whereby rocking of the shaft with the elements in the apertures of the frame will move the press roll toward or away from the wire to vary the distance between the roll and the wire, thus varying the space through which the pulp covered conductors will travel.

The frame supporting the press roll also supports spaced parallel deckles providing channels for the individual electrical conductors and their supplies of material. The frame is pivotally supported and through an operating mechanism it may be tilted from its operating position adjacent the wire and conductors to a loading position spaced from the wire and the conductors.

Other objects and advantages will be apparent from the following detailed description when considered in conjunction with the accompanying drawings, wherein Fig. 1 is a fragmentary side elevational view of a pulp insulating machine embodying the invention;

Fig. 2 is an enlarged fragmentary sectional view taken along the line 2-2 of Fig. 1;

Fig. 3 is an enlarged fragmentary sectional view taken along the line 3-3 of Fig. 1;

Fig. 4 is an end elevation view of the structure shown in Fig. 3 looking from the right;

Fig. 5 is an enlarged end elevation view of the structure shown in Fig. 3 looking from the left, portions thereof being shown in section; and

Fig. 6 is a top plan view of the structure shown in Fig. 5.

Referring now to the drawings, the apparatus in which this invention is a part is a pulp insulating machine only a small portion of which is shown in Figs. 1 to 3, inclusive. The portion of the machine shown in these figures includes a Fourdrinier wire Ill which is of the continuous type supported by spaced rollers at each end of a suction box ll the rollers not being shown in the drawings. One or more of the sup orting rollers may be driven to drive the wire continuously at a given speed to cause the upper portion of the wire which is shown in drawings to travel at a given speed in the direction of the arrow with a plurality of electrical conductors l2 which are to receive coverings of pulpous material l4 fed to the upper portion of the wire III. A cover l5 of the suction box I l is perforated at l6 at spaced positions throughout its length and width whereby the major portion of the water in the material surrounding the electrical conductors l2 may be withdrawn from the material during advancement of the wire with the conductors and material. The electrical conductors are guided by individual sheaves ii to like positions adjacent the wire I!) beyond the line of application of the material to the wire. When the conductors leave their sheaves i1 they travel in a given plane with the wire, their adva'ncement longitudinally being caused by a takeup mechanism (not shown).

The invention incorporated in the pulp machine includes a press roll 20 supported by a tiltable frame 2| which carries spaced deckles 22 to provide channels for the pulpous material applied to each electrical conductor. The frame 2i is pivotally supported at 25, the shaft serving as a pivot for the frame being journalled in suitable bearings 25 of the main frame 21 of the machine. Adjustable screws 29 extending through internally threaded lugs 38 disposed in spaced positions (Fig. l) on the front of the frame rest upon the cover l5 of the suction box I l to adjustably locate the position of the frame, particularly the positions of the deckles 22 and a press roll 28 relative to the wire H).

The deckles 22 are formed of metal strips having their upper ends disposed in notches of mounting strips 32 and secured in place by wires or rods 33 extending through aligned apertures formed in the mounting strips and the deckles. In the present embodiment there are three mounting strips 32, removably secured to brackets 34 by the aid of screws 35, the brackets 34 being fixedly mounted upon lateral portions 36 of the frame. The spaces 38 between the bars or de'ckles 22 form channels for the pulpous material l4 for each electrical conductor i2. these channels being reduced in width adjacent the wire H), by inwardly projecting portions 39 of the deckles 22.

The frame 2i may be tilted from the operating position shown in the drawings to a loading position away from the wire and the conductors, which is desirable for loading the machine. that is, for conditioning the machine for operation, and the threading of the electrical conductors therethrough. The tilting mechanism is shown mainly in Figs. 1 and 2 and includes a threaded rod 48, the upper end of which is connected to a lateral member 4| supported in a socket 42 in the outer end of a bracket 43 fixed to the central portion of the back wall 44 of the frame 2|. A nut 48 is disposed on the threaded rod 40 and is supported for rotation in a bearing 41, but held against longitudinal movement in a housing 48. A beveled gear 49 is fixedly mounted on the nut 48 and interengages a beveled gear 58 pinned to a shaft which supports a hand wheel 52. The shaft 5| is journalled in a bearing 53 of the housing 48 while the housing 48 is supported by a pivot 54 carried by the main frame 21. Rotation of the hand wheel will cause rotation of the

gears

58 and 49 to rotate the nut 48 causing the threaded rod 48 to move downwardly to tilt the frame 2i about its pivot 25.

The press roll 28 is mounted on the frame adjacent the exit end of the suction box H, its

main purpose being to force the major portion of the water, remaining in the pulpous material after it passes over the apertures l5 and cover l5 of the suction box on the wire ill, from the material. The outer portion 55 of the roll 28 is formed of a resilient material such as rubber 4 a and has equally spaced annular grooves 55' in its periphery with like smooth surfaces 56 therebetween. The roller 28 is rotatably supported on a shaft 58 in a suitable manner (not shown) the shaft being held against rotation normally.

Eccentric elements

59 and 68 are mounted near the ends of the shaft 58. These eccentric elements have circular outer surfaces 8i and 62 of like diameters which are disposed in aligned supporting apertures 83 and 84. The aperture 63 is in a bracket 65 which is mounted on the frame 2|. The aperture 84 is in an adjusting member 86 which is in the form of a sleeve disposed concentric with the element 68.

Apertures

81 and 68 of the elements 59 and in which the shaft 58 is disposed are in axial alignment with each other, but eccentric with respect to the general centerline or axes of the

elements

59 and 89 and their supporting apertures 83 and 84.

A collar 18 is mounted on one end of the shaft 58 adjacent the element 59 and carries an arm H for use in rotating the collar and with it the shaft 58 and

elements

59 and 80 to cause adjustment of the roll vertically relative to the wire H). A pin 12 carried by the bracket is positioned to be engaged by the arm H to limit its movement in one direction, and adjustable stop screw 13 carried by threaded lug 14 on the bracket 55 is positioned to be engaged by the arm H and limit its movement in the opposite direction.

The sleeve 66 is held in a given position on the eccentric element 68 by pairs of lock nuts 18 mounted upon the threaded ends of the element 80. A bracket 88 mounted on the frame 2| is apertured at 8! to receive the sleeve 66 and permit longitudinal movement of the sleeve in the aperture. A cam-like slot 82 (Figs. 3, 5 and 6) is formed in the upper portion of the bracket 88 to receive an actuating arm 84 which extends through the slot 82 and has its threaded end 85 disposed in a threaded aperture 88 of the sleeve 68.

Recesses

88 and 89 are formed in the bracket 80 at the extremities of the slot 82 to receive the inner end of a handle 90 disposed concentric with the arm 84 and normally urged inwardly toward the sleeve by a spring 9! which is housed in the handle concentric with the arm 84. The recesses receive the inner end of the handle 90 to lock the arm in either position depending upon the desired adjustment of the press roll laterally of the wire 18 to position either the grooves 55 or the intermediate fiat surfaces 56 in engagement with the electrical conductors l2.

During the operation of the pulp insulating machine, a given number of electrical conductors are advanced continuously beneath their sheaves l1 and then in a given plane adjacent the upper portion of the Fourdrinier wire it to which pulpous material 14 is applied in advance of the conductors. With the frame 2| in its operating position, the initial supply of material is divided into the channels 38, formed to receive the conductors by the deckles 22, thus controlling the material for each conductor as it moves on the wire therewith. During the movement of the wire with the conductors and the individual supplies of material in the channels, water in the material is drawn therefrom through the apertures i6 in the cover l5 of the suction box H eventually forming what appears to be paper ribbons surrounding each electrical conductor. It is hfii. Mar-m for the ction box to withdraw all the water desired from the material before leaving this area and for this reason the press roll is added to force additional water from the pulp and compress the ribbon-like materia about each conductor.

The conductors i2 may vary in size. Although during one operation of the machine, conductors of only one size are fed through the machine to receive their insulating covering, the machine may be adjusted later to insulate other groups of wires of different sizes. These variations require at least vertical adjustment of the press roll, to vary its position relative to the wire with variations in the sizes of the conductors. and longitudinal adjustment of the roll whereby the flat surfaces 56'will engage the tape covered conductors of smaller sizes while the grooves 55' maybe positioned to engage the tape covered conductors of larger sizes. To adjust the press roll vertically the arm Ii (Fig. 4) is moved into engagement with either stop 12 or 13 or to any desired position therebetween. This movement of the arm H causes rocking movement of the shaft 58 with its eccentric elements in the aligned apertures supporting them, varying the position of the press roll relative to the wire l0. Longitudinal adjustment of the press roll from the solid line position shown in Figs. 3, 5 and 6 to the broken line position shown in Fig. 3 may be accomplished by moving the handle 90 outwardly against the force of its spring 9| (Fig. 5) until it is free of the recess 88 then moving the arm 84 with the handle 90 until the handle is received in the recess 89 This movement of the arm 84 in the slot 82, which acts as a cam, will cause the sleeve 66 to move axially to the left a given distance moving with it the

eccentric elements

60 and 59, the shaft 58 and the press roll so that the press roll will be moved approximately one-half the distance between each annular groove 55'. In this manner, if the annular groove 55 were positioned adjacent the paths of the electrical conductors, they will at this time be positioned between the paths of the conductors causing the intermediate smooth surfaces 56 to ride upon the covered conductors. When it is desirable to mend a broken conduc tor, to replace any of the parts including the wire or to thread new conductors through the machine, the working area may be made accessible by rotation of the hand wheel 52 (Fig. 2)

to tilt the frame into its loading position away from the wire.

Although specific improvements of the invention have been shown and described, it will be understood that they are but illustrative and that various modifications may be made therein without departing from the scope and spirit of this invention as defined by the appended claims.

What is claimed is:

1. In a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wire whereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a tiltable frame supported above the upper portion of the wire and having an operating position adjacent the wire and a loading position away from the wire, deckles supported at parallel spaced positions by the frame between the conductors to divide the pulp into ribbons for the conductors after the pulp is fed to the wire when the frame is in its operating position, a pivotal support for the frame, a threaded rod having one end connected to the frame. a nut threadedly mounted on the rod, a pivotal support for the nut, and means to rotatably drive the nut on the rod to move the rod longitudinally to move the frame between its operating and loading positions.

2. In a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wire whereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a tiltable frame supported above the upper portion of the wire and having an operating position adjacent the wire and a loading position away from the wire. deckles supported at parallel spaced positions by the frame between the conductors to divide the pulp into ribbons for the conductors after the pulp is fed to the wire when the frame is in its operating position, a pivotal support for the frame, 'a threaded rod having one end connected to the frame, a nut threadedly mounted on the rod, a pivotal support for the nut, a gear fixedly mounted concentric with the nut, and means operatively connected to the gear to rotatably drive the gear and nut on the rod to move the rod longitudinally to move the frame between its operating and loading positions.

3. In a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wire whereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a frame supported above the upper portion of the wire and having aligned apertures in opposing sides thereof, a press roll positioned adjacent the exit end of the upper portion of the wire, a shaft to rotatably support the press roll extending therethrough and through the aligned apertures in the frame. eccentric elements mounted on the portions of the shaft in the apertures to cooperate with the frame to support the shaft and press roll with their axes coincident with each other and parallel with the axes of the eccentric elements, whereby rocking movement of the shaft with the eccentric elements .in the apertures will vary the position of the press roll relative to the wire and maintain the axis of the roll parallel with the wire, means for rocking the shaft with the eccentric elements, and means to control the rocking movement of the shaft and eccentric elements to control the position of the press roll relative to the wire.

4. In a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wirewhereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a frame supported above the upper portion of the wire and having aligned apertures in opposing sides thereof, a press roll positioned adjacent the exit end of the upper portion of the wire, a shaft to rotatably support the press roll extending therethrough and through the aligned apertures in the frame, eccentric elements mounted on the portions of the shaft in the apertures to cooperate with the frame to support the shaft and press roll with their axes coincident with each other and parallel with the axes of the eccentric elements, whereby rocking movement of the shaft with the eccentric elements in the apertures will vary the position of the press roll relative to the wire and maintain the axis of the roll parallel with the wire, means for rocking the shaft with the eccentric elements, a pivotal support for the frame, and mechanism operable to move the frame with the press roll about the said pivot between an operating position adjacent the wire and a loading position spaced from the wire and conductors.

5. In a, pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wire whereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a frame supported above the upper portion of the wire, a press roll positioned adjacent the exit end of the wire and having spaced annular grooves in its periphery with intermediate smooth portions, a shaft to rotatably support the press roll, means carried by the frame to support the shaft for longitudinal movement, and cam operable means to move the shaft longitudinally to shift the press roll laterally of the wire and conductors to selectively position the grooves or the smooth portions of the press roll adjacent the paths of the conductors.

6. In a pulp insulating machine including a Fourdrinier wire of the continuous type driven on supporting rollers to cause an upper portion thereof to travel in the same direction as electrical conductors are advanced longitudinally in close proximity to the wire whereby the conductors may be covered with pulp fed to the wire prior to the said upper portion of the wire traveling over a suction box positioned beneath the 8 upper portion of the wire to draw water from the pulp as it travels with the wire about the conductors, a frame supported above the upper portion of the wire, a press roll positioned adjacent the exit end of the wire and having spaced annular grooves in its periphery with intermediate smooth portions, a shaft to rotatably support the press roll, means carried by the frame to support the shaft for longitudinal movement, cam operable means to move the shaft longitudinally to shift the press roll laterally of the wire and conductors to selectively position the grooves or the smooth portions of the press roll adjacent the paths of the conductors, and means to lock the shaft with the ,press roll in either position.

WALDEMAR C. EWALDSON.

JOHN N. SELVIG.

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

UNITED STATES PATENTS Number Name Date 328,639 Beale Oct. 20, 1885 499,696 Aldrich June 26, 1893 574,559 Moses Jan. 5; 1897 4 717,924 Reid Jan. 6, 1903 1,065,090 Werth June 17, 1913 1,115,671 Herrmann Nov. 3, 1914 1,275,826 Alpine Aug. 13, 1918 1,436,240 Darby Nov. 21, 1922 1,452,098 Short Apr. 17, 1923 1,535,568 Bornschein Apr. 28, 1925 1,577,897 Danninger Mar. 23, 1926 1,627,739 Hosford May 10, 1927 1,632,398 Franks June 14, 1927 1,732,176 Ware Oct. 15, 1929 1,734,929 Vedder Nov. 5, 1929 1,765,515 Whitfield June 24, 1930 1,765,533 Jespersen June 24, 1930 1,765,571 Edson June 24, 1930 1,827,203 Little Oct. 13, 1931 1,870,267 Stone et a1. Aug. 9, 1932 2,046,270 Jane et al June 30, 1936 2,249,959 Johannessen July 22, 1941 2,251,492 Malkin Aug. 5, 1941 2,338,795 Berquist Jan. 11,1944 2,360,773 Helin Oct. 17, 1944 FOREIGN PATENTS Number Country Date 455,601 Great Britain Oct. 19, 1936 351,120 Germany Apr. 1, 1922 OTHER REFERENCES The Dictionary of Paper, page 126, published by the American Paper and Pulp Association.