US997085A - Antistatic friction device. - Google Patents

Description

J. J. OTOOLE.

ANTISTATIG FRICTION DEVICE.-

APPLIGATION FILED MAR. 4, 1910.

Patented July 4, 1911.

Wx MN Rm 0 & O O m w my M0 enn ar. gro m or NEW YORK, n. Y., assrenon o r ens-HALE r srms r.

HARRINGTON, or coRoNA, NEW YORK. I

ANTISTATIC FRICTION DEVICE.

Specification of Letters Patent.

Patented July 4, 1911.

Application filed March 4, 1910. Serial No. 547,269.

To all whomt-may concern:

.Be .itlknown that I, JOHN J. OToonn, a

' citizen of the United States, and a resident f and lithographing hesion of layers 0 of New York, county and State of New York, haveinvented certain new and useful Improvements in Antistatic Friction Devices,of which the following is a'full, clear, and exact specificatio This invention relates more particularly to an anti-static friction device adapted to used inconnection with printing or lithographing presses for extracting the staticelectricity from paper which is generated dufringthe process ofprinting thereon.

':-It is well known in the art of printing that the frictional adpaper due to the presence of static-electricity causes a great waste of tendant or feeder at the press.

appliances on the press,

printed upon the extending across material, consumption-10f time and loss of labor. The charge of electricity in the 'sheet slvaries with weather conditions and varies inaccordance with different classes of paper, and while the presence of the electricity prevents paper from being handled with facility before being printed upon the electricity is more pronounced and causes perceptibly stronger" frictional. adhesion after the sheets are printed on one side thereof. This adhesive tendency of the paper results in improper delivery of the sheets by the fly-sticks or other delivery the sheets clinging closely one to the other producing olfsets. .upon the unprinted side of the paper and preventing regular and even jogging or straightening-up of the sheets by the at- Moreover, corners of the sheets become crumpled and curled thereby preventing the sheets from being fed to an accurate register in printin the second side of the paper or more particularly causing inaccurate registering when two or more. colors are to be paper. The primary object of my invention 1s to provide a' device which will effectually overcome these objections and which devlce consists mainly of a numberof metal brushes the width of-the press in th b field of static-electricity created by the sheets of paper: during delivery from the printing cylinder, the said metal'brushes bethe edges and naked in bearings 1n ing adapted to attractand transmit the'electrio-fluid to a main wire through which it asses and is discharged to ground provided in a space formed at one or both ends of the main wire and the metal frame of the press.

.A further object of the invention is to provide a suitable casing of insulating mate-- rial adapted to carry the main wire and the electricity absorbing brushes which project upwardly above said casing in outwardly curved flared fan like shapes or in the form of curved prongs, and to arrange the free end or ends of the main wire so as to pro.- vide an efficient ground for the discharged electricity.

My invention, furthermore, has for its object to provide a device of; simple and inexpensive-construction which may be readily applied to and used in/connection with various forms, sizes and shapes of printing or lithographing presses, and to provide efficient means for connecting press.

A practical embodiment of the invention is represented in the accompanying drawing forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views, the said invention being more fully described hereinafter and then pointed out in the appended claims.

In the drawing Figure 1 is a to plan view of a printing press with my anti-static friction device applied thereto in front of the printing cylinder. Fig. 2 is an enlarged fragmentary side view, partly in section, of

my device, showing one form of fastening the device to a the twisted ends of the electricity absorbing brushes thereto. Fig. 8 is a section taken on the line III-III of Fig. 2. Fig. 4 1s a fragmentary sectional view of another form wire, and Fig. 5 is a section taken on'the line VV of Fig. 4.

The press 10 of any well known construction and adapted for printing or 'litho graphing on paper may comprise the customary feed board or table 11, the printing cylinder 12 upon the revolving shaft 13which is jourthe frame 14 of the of absorbing brushes showing the manner i of fastenmg the same to the mam discharge mounted in front of said table press, the paper guiding rollers 15 rotatably held upon the shaft 16 which is secured, as at 17, to the side. frames Li and the endless tapes 18 of the usual draw delivery for delivering the printed sheets of paper.

Upon the top of the press 10 is mounted my anti-static friction device 20 adjacent to and in front of the guiding rollers 15, where the field of electricity is formed under the sheets of paper delivered by the printing cylinder 12 over the guiding rollers 15\ after being fed into the press 10 for printing thereon from the table 11. The device 20 is preferably of sutlicient length to extend across the entire width of the press 10 so as to rest upon the top of the side-frames 1 1-, and is rigidly held against displacement to the shaft 16 hearing the rotatable rollers 15 by links or clamps 21 or by any other desired means.

To construct the device 20 so as to be durable, eflicient and conveniently applied to a printing press I provide a casing 22 made of Wood or any other suitable insulating material in the top 22 of which are arranged a number of openings, as at 23, and through said openings pass the stems 24: of a number of metal brushes These absorbing brushes 25 are formed of small flexible strands of wire of copper or any other. metal adapted to attract and conduct electricity, and the said brushes are arranged in a row-like manner along the top 22 of the casing 22. Each of the brushes 25 have an outwardly curved part, as at 27, Fig. 3, and project upwardly and laterally into a flared fan like shape, as at 28, so as to embrace the entire field of electricity formed by the paper during the process of printing. The stems 2a of the brushes are formed preferably by twisting the flexible strands of said. brushes, as shown in Figs. 2 and 3, and providing loops, as at 29, at the lower ends thereof for reception of the main transmitting or discharge wire or rod 30 of aluminum, copper or any other suitable conductor of electricity. A channel or groove 31 and an opening are provided lengthwise of the underside of the casing 22, and in said channel rests the transmit ting wireiSO which is held against displacement by soldering or otherwise connecting a the loops 29 thereto. These parts are inclosed within the casing 22 by a covering 33 of' insulating material fitting snugly in the opening 32 and forming a closure 3-1.

At the ends of the casing. 20 openings 35 are provided and through said openings extend the ends 36 of the main discharge wire 30. The ends 36 are insulated, as at 37, and curved, as at 38, so as to extend downwardly alongside of the frames 14 when the device is in use on top of the press 10. The extreme outer ends of the main transmitting wire 30 is freed of the insulating cover 37 and. forms in the spaces l0 between said ends 39 and the frames ll of the press grounds for discharging the electricity absorbed by the ln'ushcs from the printed paper. \Vhile I have set forth my device as having two free ends of the main wire for forming the said grounds, it will be understood, that one free end of the main wire may be dispensed with and instead thereof I may close the casing at said end and employ at this end suitable means for connecting my device to the press.

Fig. 4 shows the electricity absorbing brushes in the form of prongs or forks, as at -l-1, arranged in a row lengthwise on top of the casing 22. The forked brushes 41 are curved, as at 42, so as to extend outwardly and upwardly, and are secured with their;lower twisted ends to the main discharge wire 30 in the same manner as above described with respect to the form as shown in Fig. 2.

' It is clear that changes may be made in the formof the brushes or in the proportions and forms of the parts forming my improved anti-static friction device and in the manner and place of fastening the same to a press without departing from the scope and purpose of my invention, therefore I do not Wish to be limited to the particular form of the device herein described and illustrated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a device of the class described, the combination of an insulating casing being formed with a groove in one side thereof and having openings communicating with said groove and the front face of the insulating casing, a main discharge wire located within said groove, brush members being wrapped around and soldered to said main discharge wire and having twisted portions passing through said openings and terminating on the face side of said insulating casing in upwardly curved projecting ing a groove formed in the rear face thereof and having openings communicating wi th 1;

said groove and the front face of said-casing, a main discharge wire located within said groove, prong-ed metal brushes attached to said main discharge wire land being adapted to pass through said openings in such manner as to form brush membersprojccting from the front'facing of said insuems-'5 a lating casing, insulating material being tact with sheets of paper,- and an end of said adapted-to rest, upon said ina'in discharge main -discharge Wire terminating in close wire and substantially close said groove, a proximity with the metallic frame of a Portion of said main discharge Wire extendprinting press, substantially as described.

5' ing beyond said insulating casing, said eX- This specification signed and witnessed 15 s tending portion of said main discharge Wire this first day of March A. D. 1910.

being curved and covered with insulating JOHN J. OTOOLE. material, and means for mounting said de- Witnesses: vice upon a printing press in such manner Ennninn J. KRUG, J12,

i0 that said metallic prongs are adapted to con- G" WHYARD.

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