US287957A - Electrical apparatus for and method of controlling paper - Google Patents

Description

"(Io lodell) C 2 Sheets-Sheet 1. J. w. OSBORNE. ELECTRICAL APPARATUS PCB. AND METHOD CI CONTROLLING PAPER, Inc.

No. 287,957. Patented Nov. 6, 1883.

Invent or:

(N0 Hodel.) 2 Sheets-Sheet 2.

J. W. OSBORNE. ELEGIRIGA'LAPPARATUS FOR AND METHOD OF GdNTROLLING PAPER, 8:0. NO. 287.957. Patented Nov. 6, 1883.

UNITED- STATES PATENT I OrFIcE.

'3 JOHN W. OSBORNE, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO WILLIAM H. FORBES, OF BOSTON, MASSACHUSETTS.

ELECTRICAL APPARATIJS'FORAND METHOD OF CONTROLLING PAPER, 81c.

SPECIFICATION forming part of Letters Patent No. 287,957, dated November 6, 1883.

' Application flledseptmherm. 1883. (no model.)

To all whom it may concern.-

Be it known that I, J our? W. OSBORNE, a subject of the Queen of Great Britain, -now residing at the city of Washington, in the District of Columbia, "United States of America, have invented certain new and useful Improvements in Electrical Apparatus for and Method of Controlling Paper and other Materials, of which the following is a specification.

Heretofore it has been the common practice to use mechanical means for controlling paper and other materials in holding, feeding, and

delivering the same in various machines, such as printing and embossing presses, bronzingmachines, and the like. These means consist, ordinarily, of grippers, fingers, tapes, feedrollers, and similar devices, all of which more or less disfigure the material operated upon, and at the same time fail to produce that Ill timate contact oradhesion between the material fed and the feeding devices that is desirable. This difficulty has been partly overcome by the use of pneumatic devices; but the production of the vacuum or plenum neces sary to produce the desired result requires a great expenditure of energy, and the adhesive force thus obtained is not easily controlled.

The object of my present invention is to over come these difficulties by substituting for these means, in whole or in part, electrical devices; and to this end my invention consists, broadly, in the utilization of the attraction which'bodies have for each other when charged with electricity of opposite polarities, and the repulsion which they manifest when charged with electricity of the same polarity, for the purposes of holding, feeding, and delivering paper and other materials.

In carrying out my invention I produce the necessary adhesion between the material controlled and the operating devices 'by impart ing by conduction or convection a charge of one polarity to one and a charge of the opposite polarity to the other from any source of electricity; or I may impart by conduction or convection a charge of one polarityeither 'to the material or the operating devices, and

a charge of opposite polarity to the other by induction. I am thus enabled to secure a close and strong adhesion at the desired points between the paper or other material and the operating devices, and also the necessary repulsion where required, as will hereinafter more fully appear. I

As a source of electricity, an ordinary frictional generator, an influence-machine, an induction-coil, a magneto-electric generator, or a battery of high potential, or, in fact, any apparatus adapted to furnish the necessary electric charge, is used. Onepole of the generator is connected with or brought into proximity to the material to be operated upon, which thus receives a charge of one polarity. The other pole of the generator may either be connected directly or brought into proximity with the support of the material, which thus receives the charge of opposite polarity directly; or the said pole may be grounded, and the support of the material thus receive its charge by in duction. Ordinarily, it will be necessary to connect the support electrically also with the ground. This isfound in practice to be the most convenient arrangement. In order to overcome at the desired time the adhesion thus produced between the material and its support, I make use of the difi'usion of the charge into the air, and I discharge the support into the ground. In some instances where the-discharge of itself is insufficient to prompt ly overcome-the adhesion, it may be aided by producing charges of the same polarity both in the material and the support at the desired points, thus producing a repulsion between the material and its support.

In order to more particularly describe and illustrate my invention, reference is made to the accompanying drawings, forming part of this specification,wherein I have shown, prim cipally diagrammatically, the application of my invention as a substitute for and auxiliary to the ordinary means of controlling sheets and webs of material through various machines, and in whichp Figure 1 is a diagram illustrating the principle of my invention. Figs. 2, 3, 4, 5, and6 show diagrammatically my invention as applied 'to various styles of printing-machines. Fig. 7 shows it appliedtoabr'onzing-machine.

. Fig. 8 shows it applied to thefeeding of semi:

conducting webs of paper orsimilar material. Fig. 9 shows the preferred forms of eminators in cross-sections and side views. "Fig; 10 shows rob my invention as applied when the charge is generated at the point required, and Figs. 1 1

and 12 show means for reducing and controlling the field .of charge.

In Egg. 1, I have shown at G a conventiona sign for a generator, the preferred form of which consists of an influence-machine of the kind known as a; Holtz machine, improved by Wimshurst, which may be driven by. the same power that drives the machine. The

prime conductors of said machine, P and N, are

connected one by insulated wire to the pointed or comb-like charging-brush B and the other to the ground. A'rotating roll or cylinder, C,

r 5 driven by suitably power, ishere shown as ing material,may be used. At the moment the material touches the cylinder, itwill closely adhere to it, whether thesame be entirely of metal or of metal covered with insulating ma-' 3 5 terial. If entirely of metal, the paper or other slightly conducting materialwill charge the cylinderby conduction, which charge is, however, instantly carried ofl" to the it will also act inductively upon the same, repelling the electricity of the same polarity-in this instance tothe ground-and attracting and holding the electricity of oppositepolarityin this instance negative. Thus if the supply from I the primarysour'ce were now interrupted,the material would for a short time adhere to the cylinder until it was discharged to the ground or surrounding air. Since, however, ply from the source is continuous, the material will continue to adhere to the cylinder, and will be carried around by the same until stripped ofl' mechanically by the stripper S, when used, or otherwise. .When the metal cylinder is covered with insulating material, the operation will be similar, except as modi- 55 -fied by the greatly-diminished conduction from the paper to the cylinder, and the increased inductiomwhich again is modified bythe thick ness of the non-conducting material. In some.

, instances the action of the stripper is aided by imparting to it a charge of the same polarity as that received by the paper, asby a branch} wire, 8, connecting the prime conductor with the stripper; and the stripper may sometimes be entirely dispensed with by charging the .paperat the point it is desired that it. should leave the cylindenwith electricity of opposite polarity by. means of a brush, B, connected 8 type of a feeding or carrying roller of any maprinting, em-.

' r an adjunct thereto.

A stripper, S, of conducting or non-conduct-' ground, and

the supto the opposite pole ofthe generator by the conductor 8, whereby at this point a repulsion between the paper and cylinder may be effected. From this it will be seen that by my invention I am enabled to feed, hold, and deliver paper and other material without the aid of the ordinary mechanical gripping or controlling devices.

. I The force ,of the adhesion of the material to 1 the cylinder depends upon the charge received by the material, whichin turn depends upon the electrical tension in the prime conductor, the quantity of electricity emanating from the points or brushes, and the dist-mice of the-lat ter from the material.

In Fig. 2, I have shown my improvement as applied to a typical cylinder-press provided with the usual gripping devices and used as Inthese presses only one edge of the paper is positively held by the gripping devices, and it has .been found necessary to providespecial means for preventing the body of the sheet from shifting or flapping during its passage from the feed-board to the delivery apparatus. I overcome this difiiculty by my invention by charging'the sheet of pa,-

per or other material as it passes from the feed- .board to the cylinder by means similar to those described in connection with- Fig. 1. Referring to the figure, e is the impression-cylinder; b, the gripper holding the forward end of the sheet M. a is the feed board. c is the form upon the moving bed'd, and f is the delivery;cylinder. B is a brush connected to one pole of the generator, the cylinder being grounded, as in Fig. 1.

The operation is as follows: The sheet is fed from the feed-board tothe gripper on the impression-cylinder in any usual manner, and is carried around in the direction shown by the arrow in front of the brush. It thus receives a charge of electricity, and in the manner described with reference to Fig. l-it will strongly adhere to the cylinder until the impression is made, by which time the charge will be partly dissipated into the air or discharged through the machine, so that it ,will be easily delivered by any common delivery apparatus.

In Fig. 3 is shown an application of my invention to what is kno'wnas a continuousrevolution printing-press. In these machines the paper is carried around by the cylinder, and is then delivered to a fly or other delivery apparatus. It is therefore desirable that the paper should adhere to the cylinder both before-and after the'impres'sion, and should then be disengaged from thecylinder. To accomplish this I provide, in addition to the ordinary grippers, brushes'B .B on opposite sides of the cylinder, which may be connected to one pole of the generator, and a brush, B,

the generator are also connected to the contacts k l, and the contacts 9 g are connected to the ground. A switch, r, is arranged to make contact with either of the two contact-platesk Z and the ground. This switch is operated by.

mechanism timed so as to produce the charge in B just at the moment the sheet is to be delivered upon the fly,.and after the delivery of the paper to re-establish contact with Z. This operating mechanism may be connected to that operating the fly, or to any other desired or convenient part of the mechanism.

The operation of this arrangement requires no passes onto the cylinder under tension, insuring its close contact with the-same and avoidance of all wrinkles or other irregularities.

In Fig, 5is shown, diagrammatically, adelivery apparatus consisting of cords, tapes, or belts passing over the usual guide-rolls. The paper as it is delivered from the impressioncylinder in any usual manner is passed to the tapes t, and therereceives a charge from the brushes B, located above each roller or support, which are preferably arranged at distances apart not exceeding the length of the sheet, if sheets are used. The necessary adhesion of the paper to the feeding devices being thereby secured, the paper is delivered in the usual manner.

In Fig. 6, I have shown the application of two or more charging-brushes on opposite sides of an impression-cylinder of a multiple-color press. The printing-forms p in this case are curved, and are disposed about a large cylinder. This form-cylinder rotates in contact with the impression-cylinder O, on which the sheet to be printed is held while the inked forms are passing, so that all the colors are printed in proper sequence on the same side of the same sheet. In a press of this sort there is no difficulty in laying hold of the leading edge of the sheet by grippers on the impression-cylinder; but as the latter is usually of small diameter, it is not easy to hold the tail of the sheet in perfect contact with the cylinder-face, so as to insure good register and keep the inked surface of the paper from flapping and smearing itself. I accomplish this result by locating a charging-brush B before and behind the cylinder, whereby the charge in the paper and its adhesion to the cylinder. are maintained throughout the rotation of the im-- pression-cylinder. A brush B, for neutralizing or reversing the charge, is located at the point of delivery of the sheet, and is connected with the generator and brought into action substantially in the manner described with reference to Fig 3.

.charge, is locatedat the point of delivery.

'venient.

In Fig. 7 is shown in outline a bronzi'ngmachine with my invention applied thereto.

From thefeed-boarda the paper passes to the drum 0, where it is held 'bythe charges received from the brushes B B, and is carried 7 under the bronzing and polishing rollers E. A. brush B, for neutralizing or reversing the In Fig. 8, I have shown the means. for feedinga web of more orless conducting materialsuch, for instance, as damp paper-to any kind of a machine. R is aroll of material to be fed. The cylinder or feed-roll G is in this instance covered with a layer of insulating material, I, and upon each side of the cylinder in the line of feed are metallic plates m. A brush B is located so as to charge the paper when it passes over the roller. By contact of the damp pa- .per with the plates m, which are properly grounded a portion of the charge is lost; but

enough of it remains to charge the cylinder '0 by induction. so as to cause the paper to adhere to the same and be carried along as the cylinder revolves.

I have found that the interposition of any screen between the-emanating-points and the surface which supports the material to be held intercepts the electrical radiation, causing an electrical shadow, as it may be called, to fall upon the paper or other substance. within which no adhesion takes place. Iutilize this fact in limiting or controlling the extent of the field of charge orfor entirely cutting the same off. v

In Fig. 11 theweb M is fed forward by reason of its adhesion to the cylinder or roll (i. To prevent the wider extension of the emanation from the points above the web, (whereby the field of adhesion may extend somewhat beyond that part which is in contact with the roll and cause it to deviate from the true tangential position,') I place the shields or screens T T as sh own. If bythe dotted lines emanating from the brush B the cone of electrical influence is indicated, these soreensTT will be joined, to reduce the field of charge upon the cylinder, in the mannerindicated, so that only a limited strip of the web adheres, the width of which depends on the proximity of the plates T T. In some respects, therefore, these plates play the part of strippers, and I have found that their oflice for this and other purposes is satisfactorily performed, whether they are made of non-conducting or conducting material, and whether the latter is grounded or not.

In Fig. 12 the interposition of a screen at the proper moment is made to perform useful work in conjunction with the method hereinbefore described for holding or retarding the sheets fed from a feed-board to the grippers of an impression-cylinder. In performing this function the screen obviates the necessity for an automatic switch, the introduction and working of which may not be at all times con- The shield T swings on hearings co.- incident with the axis of the emanator'B, and when the cam Q raises the rod Y it moves the IIO rubber, o, coveredwith fur or other equivathe machine'itself will be sufficiently connected 'arm connected with the screen, whereby the .cies of the occasion, so long asthe fundament- .In some instances, where fingers are used in same drops and cuts off all emanation from the brush, so that it will not reach the feed-board. While the'screen is in this position, the sheet can be moved in every direction, and the feeder is enabled to place it properly up to the stops and guides. The cam rod Y or an equivalent device then drops and causes the removal of the screen, whereupon the adhesion is immediately established and the sheet resists the pull of the cylinder, as before.

Fig. 9 shows in cross-section and side elevation portions of an emanating or radiating conductor such as I usually employ, in which J is the metallic core, I the insulating-envelope, and X the emanating points or loops. Instead of using points or loops, in some instances knife-edges may be used for radiators. The brushes or emission-points may be made of flaxen threads or fibers, the flair being a conductor to some extent.

In the application of my invention so far described I have assumed the use of an independently-operated generator, and the electric charge was carried to the machines by conductors. I may, however, in someinstances generate the electricity required directly upon the material to be fed or upon the feeding devices. In Fig. 10, I have shown 'one' form of such a device, in which a revolving excitinglent material, bears upon the material fed. The electric charge is thus generated directly at the point required in a manner well understood in the art.

It will be understood that I do not confine myself to the application of.my invention to any particular machine, nor to the particular details herein set forth, as I consider myinvention as applicable to all machines through which sheets, laminae, or webs of paper, cloth, and other materialsare fed, and the details of construction and arrangement may be varied in a great number of ways, to suit the exigenal principles involved are observed.

To illustrate some of the more apparent modifications it may be remarked that it'is not necessary in many instances to provide special devices for grounding the machine, as

with the ground. In place of intimate groundconductors, as shown, pointed grounded con ductors may be disposed about the machine.

delivering, it will be desirable to make them conductors, and to connect them also to the ground. The close proximity of the chargingbrushes to the paper is not necessary; nor is alarge nu mber of emission-points to the brushes necessary, a single.point producing very considerable effects and covering a wide area on the paper, if not too close. I have found that a fine wire, preferably bent into a loop and made part of the'charging-conductor, formsian excellent radiator. The "fineness of the wire should be so proportioned to the charge that I it will appear luminous in the dark, due to the electric radiation. The number of chargingbrushes and the" distribution of the same in any machine will depend upon the quantity of I electrical charge required, the amount of dis sipation due to the conditions of the atmosphere, and leakage due to imperfect insulation,

and many other circumstances which it is not deemed necessary to recite. In delivering the material, instead of reversing the charge, grounded points or metallic brushes may be located in proximity to the points of discharge,

and when a metallic stripper is used it may be simply grounded.

I claim I 1. The method, substantiallyashereinbefore set forth, of controlling sheets or webs of paper or other materials upon a support, which consists in imparting to such material and support charges of electricity of proper polarity, whereby the necessary attraction is produced.

2. The method, substantially as hereinbefore set forth, of controlling sheets or webs of paper or other material upon a support, which consists in imparting to such material and support charges of electricity of the proper polarity, whereby the desired attraction or repulsion-is produced.

3. The method hereinbefore set forth of holding sheets or webs of paper and other materials to a support in its passage through a machine, which consists in charging the material with electricity of one polarity and the support with electricity of the opposite polarity. 4. Themethod,substantiallyashereinbefore set forth, of controlling sheets or webs of paper or other material during its passage through a machine, which consists in producing charges of electricity of opposite polarity in thematerial and support, respectively, and whereby the necessary adhesion is produced between the two.

5. The method, substantially as hereinbefore set forth, of holding and delivering sheets or webs of paper, 850., which consists in producing charges of electricity of opposite polarity in the material and support, respectively, and utilizing the adhesion thus produced between the two to hold the material. and in neutralizing or dispersing said charges, to overcome the adhesion and deliver the material.

6. The method, substantially as hereinbefore set forth, of feeding, holding, and delivering sheets or webs of paper and other material,

.which consists in producing charges of electricity of opposite polarities in the material and support, respectively, and utilizing the adhesion thus produced between the two to hold and feed the material, and neutralizing such adhesion by reversing the polarity of the charge'in one to deliver the material.

7. The method, substantially as hereinbefore set forth, of holding, feeding, and controlling sheets or webs of paper and other materials upon a roll or cylinder, which consists in continually producing a charge of electricity of one polarity in the material and a charge of the opposite polarity in the roll or cylinder.

S. In a machine for feeding, holding, or delivering sheets or webs of paper or other ma- 5 terials, the combination, with a support forthe material and a source of electricity, of means for producing a charge of electricity in the support and the material, substantially as described.

9. In a machine for-feeding, holding, or delivering sheets or webs of paper or other material, the combination, with a support for the material, of a source of electricity, and means for producing in the support and material 1 charges of electricity of opposite polarity, re-

spectively, substantially as described.

10, I11 a machine for feeding, holding,- or controlling sheets or webs of paper or other material, the combination, with a support for the material and a generator of electricity, of means for producing in the support and material charges of electricity of opposite polarity, and means for neutralizing the charge, substantially as described.

controlling sheets or webs of paper orother material, the combination, with a support for the material and a generator of electricity, of means for producing in the support and material charges of electricity of opposite polarity, and means for producing charges of the same polarity in the support and material, whereby the material may be held to thesupport by the adhesion dueto bodies-charged with electricity of opposite potentials, and delivered by the aid of the repulsion due to bodies charged with like polarity,

12. In a machine for feeding, holding, and controlling sheets or webs of paper or other material, the combination, with a feedof carrying roller or cylinder, of a generator of electricity, and a radiator or emission-point connected to the generator, and arranged so'as produce charges of 'elect'ricity in the material) 5 13. In a machine for feeding, holding, or controlling sheets or websof paper or other material, the combination,-wi th a feed or carrying roller or cylinder, of a generator of electricity, aradiator or emission-point connected ,0 with the generator, and a. stripping or delivering device.

11. In a machine for feeding, holding, 'or- 14. In a machine for feeding, holding} or controlling sheets or webs of paper or other material, the combination, with a feed or carrying roller or cylinder, of a generator of electricity,la radiator or emission-point connected with the generator, and a stripping or delivering device, connections from the delivery device to the generator, and means whereby either or both radiator or delivery device may be connected to either pole of the generator.

15. The combination, with a support and a generator of electricity, of radiators or emission-points, and screens for interposition beas described.

16. The methodfsubstantially as hereinbefore set forth, of controlling paper and other materials, which consists in charging the sup port or material with electricity and intercept ing the electricity, or screening the support or tween the radiator and support, substantially .6 5

material from the influences of electrical emanations from the charging device.

17. The method, substantially as here n set forth, of 'controlling paper or other material upon a support, which consists in directlycharging the material with electricity of the desired polarity and producing a charge of the desired polarity in the support.

18. The method, substantially as herein set.

forth, of controlling paper and other material on a support, which consists in directly and continuously charging the material with electricity of the desired polarity from the source of supply andcharging the support by induction.

19. The method, substantially as herein set forth, of controlling paper or other material, which consists in retarding, hindering, or restraining the free passage of the material to a device by which it is seized or to which 1t is fed bythe creation of friction due to the attraction between bodies charged with electricity. v

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN- w, OSBORNE.

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