US1615395A - Method of and apparatus for coating cores - Google Patents

Description

25 1927. J. s. LITTLE METHOD OF AND APPARATUS FOR COATING CORES Filed August 29, 1924 3 Sheets-Sheet 1 JEZUQTZZEW ncfafimSwyw ymm Jan. 25, 1927. 1,615,395

J. S. LITTLE METHOD OF AND APPARATUS FOR COATING CORES Filed August 29, 1924 3 Sheets-Sheet 2 Jan. 25, 1927.

1,615,395 J. 5. LITTLE METHOD OF AND APPARATUS FOR COATING CORES Filed August 29, 1924 s Sheets-Sheet 5 V Patented Jan. 251927.- I

UNITED STATES PATENT JOHN SHIRLEY LITTLE, OF LA "GRAN GE, ILLIE'OTS, ASSIGNOB TO WESTERN COMPANY, INCORPORATED, OF 1\TEW YORK, N. Y., A. CORPORATION OF NEWiYOBI.

METHOD OF APPARATUS FOR COATING OORESJ.

AppHcationmed August 29,1924. Serial No. 784,874.

Fig. 5 is a plan section taken on line V This invention relates to a method of and apparatus for coating cores, and more particularly to a method of and apparatus for coating cores with pulpous material.

5 The object of the invention is to apply pulpous material.- to a plurality of spaced coresin such manner that the pulpous material becomes ap-coating common to said cores, the coating being attached to the cores l by the intermingling of, the fibers of the pulpous material so tliat'no adhesive substance need be used.

In one embodiment of the invention, the improved method is practiced by means of 15 apparatus adapted to produce an article described in my co-pending application Serial No. 7 34,87 filed August 29, 1924, and comprising a plurality of spaced electrical conf ductors iii-strand form'coated with a com- 20 mon covering of pulpous materialwhich is attached to the conductors solely by the inter'mingling of the fibers thereof.

In accordance with the features of the invention, the plurality of electrical conduc- 5 tors are simultaneously subjected to a liquid containingpulp in such manner that a rib bon of wet pulp is applied to the conductors, the conductors being held in spaced relation while the ribbon" is being formed. Excess moisture is removed from the ribbon and it is wrapped around itself and the conductors to form a uniform coating for the conductors which are drawn toward each other during'the wrapping o eration to impress and clamp some of the brous pulp between them. The coating is then dried. It insulates the conductors ,from each other.

The word pulp? as used'in the specification and claims is to be understood as defining and including any'cohering fibrous mass whether suspended in a liquid, moist, or substantially dry. t i

Other features of the invention will become apparent asthe detailed description progresses, reference being had to the accompanying drawings, wherein- Figs. 1 and 2 are complementary parts of a plan view partly in section of. apparatus embodying the invention;

, Figs. 3 and 4 are complementary parts of a longitudinal section through the apparatus shown in Figs. 1 and l;

of Flg. 4;

Fig. 6 is a section taken on line 66 of Fig. 5, and

Figs. 7 to 10 inclusive are enlarged transverse sections which progressively illustrate the inanner in which the apparatus shown in Figs. 1 to 6 inclusive forms a common coat ing of pulpous material upon a plurality of electrical conductors in strand form.

It is believed that a complete understanding of the improved method will be procured from a description of apparatus by means of which the method may be practiced.

The improved apparatus shown in the accompanying drawings is adapted to apply a common coating of paper to a plurality of electrical conductors in strand form, the coated conductors constituting the aforementioned article described in my copending application Serial No. 734,875, filed August 29,1924.

One end of the apparatus first subjects the electrical'conductors to a liquid containing pulp which is suitable for the manufacture of paper, the conductors being subjected to the liquid containing pulp in such manner that a ribbon of wet pulp is deposited upon the conductors while the apparatus then removes excess moisture from the wet pulp and forms it into a uniform coating or the conductors, .which coating is sub sequently dried.

That end of the apparatus which is adapted to subject the electrical conductors to the liquid containing pulp and to remove ex; cess moisture from the ribbon-0f wet pulp is termed the wet end of the apparatus and is indicated by the reference character .in the drawings. The wet end 15 comprises a drum 16 partly submerged in a liquid containing pulp held in a tank 17. The drum 16 comprises a pair of spiders 18 secured to a shaft 19 rotatably journaled in a plurality of bearin 20 which are mounted upon the walls of t e tank 17. Fastened to the spiders 18 are bars 22 adapted to support a helical member 23 formed of a rod wound around the bars. The. helical member 23 supports a coarse mesh screen 24. which in turn supports a fine mesh screen 25, the fine mesh screen24 being covered by a plurality of rings or dams 26 of any suitable material. The dams 26. are spaced from each other to provide a plurality of screened annular passa es 27 through which liquid may flow from t e tank 17 into the drum 16, the

liquid being discharged through the ends of the drum. The tank 17 comprises side walls 32, each of which has a chamber 33 adapted to receive the liquid discharged through the ends of the drum 16.

passage 35. Means is provided for main taining the liquid containing pulp at a predetermined level in the tank 17. This means is full described in my copending application erial No. 725,045, filed July 9,1924."

As best shown in Figs. 2 and '4, electrical conductors 12 which are to be subjected to the liquid containing pulp are withdrawn from a plurality of supply reels mounted upon a shaft 66 which is supported by any suitable means. The electrical conductors 12 are trained over a plurality of grooved rollers 70 rotatabl journaled by a shaft 71 mounted in the si e walls 32 of the tank 17. Thegrooved rollers 70 are adapted to space the conductors 12 a predetermined distance apart and to guide a plurality ofthe conductors to each of the foraminous passages 27. In the embodiment of the invention shown in the accompanying drawings, a pair of conductors 12 is delivered to each screenedpassage 27. A ribbon of wet pulpous material is applied to each pair of conductors as they are carried through the tank by the drum. The arrangement is such that some pulp is first strained onto the fine mesh 25 before the conductors are brought into contact therewith. Then when the conductors contact the initial layer of pulp on the fine mesh screen 25 and the drum continues to revolve in the tank, an additional amount of pulp ,will be deposited on each pair of conductors and on the screen. The pulpous material deposited upon each pair of conductors and the screen will adhere to the conductors in the form of a ribbon 73, as illustrated in Fig. 7. It will be noted that the ribbon 73 is common to each of the Spaced conductors 12, and that the conductors are embedded in the ribbon.

A woven belt 75 aids in freeing the pulp ribbons from the screens 25 when the conductors 12 leave the drum. The belt 75 is held in contact with the .drum 16 by a felt covered roller 76 which co-acts with the belt75 and the drum 16 to squeeze excess liquid from the'pulpous material adhering to the conductors. Each pair of conductors 12 and its associated ribbon 73 of pulpous material is advanced with the belt 75 and between it and. a similar belt 79. The belt 75 is trained over a plurality of rubber covered rollers 80 and 81 and'over a plurality of rolls 83, the rollers 80 and 81 and the rolls 83 being rotatably journaled in a frame 77. Means (not shown) is provided for driving the roller 80 and it-drives the belt 75. which in turn drives the drum 16 and the belt 7 9, the belt 79 being held in frictional contact with the belt 75 by means of a plurality of rubber covered rollers 85 and 86. The rollers 81 and 86 and the rollers 80 and 85 co-act with each other to squeeze excess moisture from the ribbon 73, the belts 75 and 79 being sufliciently coarse to allow the liquid to escape therethrough. The belts 75 and 79, together with the rollers 80, 81, 85 and 86 prevent the pulp ribbons 73 from losing the form imparted to them by the felt covered roller 76 and the drum 16, the form so imparted to the ribbons 73 being illustrated in Fig. 8. I

A plurality offorming mechanisms 90 are adapted to receive the pairs of conductors 12 with their ribbons 73 of pulpous material when they are discharged from the wet end 15, the conductors and ribbons being uided to the forming mechanisms by a plura ity of sheaves 95. The forming mechanisms 90 are preferably of the type shown and described in theco-pending application of Jespersen, Serial No. 713,704, filed May 16, 1924. They are rotatably mounted in a hollow frame 91 and are rotated by suitable means indicated at 92. Each forming mechanism 90 is adapted to receivea pair of conductors 12, together with the associated ulp ribbon 73 and to wrap the pulp ril ibon around itself and around the conductors to form a uniform homogeneous coating for the conductors. The manner in which the ribbon is wra ped around itself and the conductors is il uSt-rated in Fig. 9. the fully formedv coating being shown in Fig. 10. The forming mechanisms are adapted to draw the conductors 12- embedded in each ribbon 73 toward each other during the forming or wrapping operation. This is advantageous in that it permits the conductors 12 to be spaced an appreciable distance apart when they are advanced to the drum 16, thus allowing a substantial quantity of fibrous pul to be deposited between the conductors. l uring the forming operation a portion of the pulp is compressed and clamped between the conductors, and this portion, when dried, serves to insulate the conductors from each other.

The coated conductors are dried in ahousing to which they are advanced overa plurality of sheaves 101 adapted to guide them through a plurality of apertures 102 formed in one of the walls .of the housing. Thecoated conductors are drawn over a pluralit of sheaves 103in the housing 100 and are ischarged from the housing through a plurality of apertures 105 formed in another wall of the housin Means indicated at 106 is provided for subjecting the pulpous coat- 1n son the conductors to air of predetermined relative humidity and predetermined temperature. This means is described in detail in my co-pending application Serial No. 716,842, filed May 30,1924. When the coated conductors are discharged from the housing 100 they are guided by a plurality of sheaves 108 to 'a plurality of take-up spools 109 which are driven by any suitable means '(not' shown).

What is claimed is:

1. A method of coating cores in strand form which consists in subjecting a phi rality of cores-to moist pulpous material in such manner that pulp is applied to the cores, and then causing relative lateral motion between the cores and a portion of the pulp to formthe pulp into a uniform coatin common to said cores retained thereonsolialy by an intermingling of the pulp fibers. 2. A method of coating cores in strand 'form which consists in subjecting a plu-' rality of cores to liquid containin pulpous material in such manner that pulp-1s ap lied to the cores, removing excess mo sture mm the pulp, and thenwrapping the pulp into a uniform coating common to said cores.

3. A method of coating cores in strand form which consists in sub ecting a plurality of spaced cores to liquid cohtainin pulp in such; manner that pul is applie and then causing relative lateral motion between the-cores and a portion of the pulp on the cores to form a common covering therefor.

5. A method of coating cores in strand form which consists in subjecting a plurality of spaced cores to ali ui'd containing pulp in such manner that pu p is ap lied t ereto, removing excess liquid from t e pulp, and thentreating the pulp on the cores in such manner that the fibers of the pulp are intermingled to hold the pulp on 2 the cores to form a common covering therefor.

6. A method of coating cores in strand form which consists in subjecting a plurality of spaced cores to a 1i uid containln pulp in such manner that pu p is applied t ereto,

thereto,

removing excess liquid from the pulp,- and then treating the gulp on the cores in such manner that the bers of the pulp are intermingled to hold the pulp on the cores to form a common covering therefor, and then dgving the covering.

7. method of coating'cores in strand form which consists in appl ing a ribbon of pulp to a plurality of s ace cores, and then causing relative latera movement between the core and a portion of. the pulp ribbon to cause an intermingling of the fibers of the pulp so that itis firmly attached to the cores solely by an intermingling of the pulp fibers to form a common covering therefor. 8. A method of coating cores in strand form which consists in appl ing a ribbon of wet pulp to a plurality o spaced cores, removing excess moisture from the ribbon of pulp, and then treating the pulp to cause an intermingling of the fibers thereof so that the pulp is firmly attached to thecores solely by an intermingling of the pulp fibers to form a common covering therefor.

9.. A method of coatingcores in strand form which consists in appl inga ribbon of wet pulp to a lurality of spaced cores,

wrapping the rib on around the cores to form a common covering therefor, and then drying the covering.

. 10'. A method of coating cores in strand form which consists in passing a plurality of'spaced cores through a wet pulp mixture to cause the pulp to be deposited thereon, withdrawing the cores from the mixture to cause the pulp to cling thereto, and then causing relative lateral motionfbetween the cores and a portion of the pulp to cause an intermingling of the fibers thereof so that the'pulp is attached to the cores and forms a covering common to the cores.

11. A method of coating cores in strand form which consists in applyin unfinished paper to a. plurality of space cores, and subsequently completing the fabrication of the paper on the cores by causing relative lateral motion between the cores and a portion of the unfinished paper in such manner that" the paper is formed into a covering common to the cores.

122 A method of coating coresin strand form which consists in applying a ribbon of unfinished paper to a plurahty of cores, forming the unfinished paper by a wrapping operation to surround the cores and constitute a common uniform covering therefor, and then drying the covering.

13. A method of coating cores in strand form which consists in applying pulpous material to a plurality of spaced cores in such manner that the ulpous material holds the cores in spaced relation, and then wrap-' ping a portion of the pulpous material around the, cores to form the glulpous material into a coating common to t e cores and retained thereon solely by an intermingling of the pulp fibers.

14. A method of coating cores in strand form which consists in embedding a plurality of cores ina ribbon of pulpous material adapted to hold the cores in spaced relation, and then wrapping the ribbon around the cores forming a common covering therefor and retained thereon solely by an intermingling of the pulp fibers.

15. A method of coating cores in strand form which consists in attachin a ribbon of wet pulpous material to a plurality of spaced cores, and then causing re ative angular displacement between the cores and a portion of the ribbon'to form said ribbon into a homogeneous coating common to the cores.

16. A method of coating cores which consists in subjecting a plurality of spaced cores to a 'coverlng material while in spacedrelation, causing relative movement between said cores, and contemporaneously treating said material so that it forms a continuous,

integral and homogeneous coating common to said cores. 17 ,-A method of coating cores whichconsists in sub'eeting a plurality of spaced cores in strand orm to aliquid containing pulp in such manner that the cores are embedded in wet pulp, moving'the cores towardeach other, forming the wet pulp into a coating common to said cores, and then drying the coating. a

18 A method-of coating cores, which consists' in embedding a plurality of spaced cores in strand form in a ribbon of moist pulpous material, causing relative movement between the cores, and contemporaneously formin'g'the ribbon of pulpous material into a coating common to both cores.

19. In apparatus for coating cores with pulp, means for applying wet cellular pulp fibers to a plurality'of cores, and'means for causing relative lateral motion between the cores and a portion of the pulp to form the pulp into a uniform covering common to said cores.

20. In apparatus for coating. cores with pulp, means including a member having an annular forafminous surface for applying the pulp to a plurality of spaced cores, means for guiding the cores to the foraminous surface, and means for wrapping'the applied pulp into a uniform coating common to said cores.

21. In apparatus for coating cores, means for applying material to a plurality of spaced cores in strandform so as to form a common covering for. the cores, and means for repositioning said cores with respect to each other. after said common covering has beenapplied.

22. In apparatus for coatin ,cores, means 'for subjecting a plurality -o spaced cores (pulp in such a manto a liquid containing ner that pulp is applie to the cores,-means for drawing the, cores toward each other after the pulp has been applied thereto, and means for. forming the applied pulp into a uniform coating common to said cores.

In witness whereof, I; hereunto subscribe my name this 15th day of August, A. D.- 1924.

JOHN SHIRLEY LITTLE.

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