US1503224A - Portable antioffset device - Google Patents

Description

' J. R. BLAINE PQRTABLE AN'I'IOFFSJET DEVICE Filed'March 28. 1921 UHT are

JOSEPH R. BLAINE, OF OAK PARK, ILLINOIS, ASSIGNOR 'I'O MIEHLE PRINTING PRESS & MG. (10., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PORTABLE ANTIOFFSET DEVICE.

Application filed March 28, 1921. Serial No. 456,258.

To all whom it may concern.

Be it known that I, JOSEPH R. BLAINE, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Portable Antiofiset Devices, of which the following is a specification.

My invention relates to printing presses I1) and particularly to an anti-offsetting device for use in connection therewith.

It is a well-recognized fact in the printing art that the ink which is impressed on sheets of paper in printing presses does not have suiiicient time to dry between the time the impression is made and the time the sheet is delivered to the pile. When printing is being done on glazed paper the ink requires a longer time to dry because of the fact that the paper absorbs the ink less rapidly than when unglazed. Consequently, when printing on glazed paper it is necessary to insert slip sheets between adjacent sheets to prevent ofi'setting. This requires slip sheets but the time of operators to insert the sheets between the printed sheets.

One of the objects of my invention is to provide an anti-offset device which will 39 eliminate ofi'setting and avoid the use of slip sheets. Another object of my invention is to provide an anti-oflset device which is readily portable and may be app-lied to several printing presses at the same time.

A further object is to provide an antiofisetting device which will be simple to connect and operate.

A still further object is to provide an anti-ofl'set device in a portable form so that the same may be moved from one printing press to another, or brought into position to serve several presses at the same time to efiectively prevent ofisetting.

A still further object is to improve antiofisetting devices for successful commercial use in connection with printing presses.

In carrying out my invention 1 have shown in somewhat diagrammatic form the essential features thereof.

In Figure 1, I have shown the preferred form of my invention.

Figure 2 is a top plan view of a portion of the apparatus shown in Figure 1; and,

Figure 3 is a sectional view through the not only the paper necessary to make theporta-ble container of Figure 1 showing the same and means for creating the high frequency current in a diagrammatic form.

Carrying out my invention I utilize the well-known corona discharge placed in close proximity to the printed sheet and provide means in portable form for creating radio frequency current necessary to make the corona dischargef In the drawings, 5 represents a printed sheet being carried on the conveyor tapes 6 suitably mounted on rollers 7 and 8 of a printing press of any usual type. Sheet 5, it is understood, is being conveyed from the printing rolls to the pile table. Mounted above the sheet 5 is a board 9 carrying'conductors having overlapping portions for the purpose of permitting a corona discharge, the conductors being ar-- ranged as shown in Figure 2, in which each end of the conductors terminates in binding posts 10 and 11, for connection by wires 12 and13, with a source of radio frequency current. It is a well recognized fact that the present type of high potential current installation used for the purpose of remov- 80 ing static electricity from printing paper is very dangerous, often times resulting in disastrous injuries to operators where such lnstallations are being used. Furthermore,

it is a well-recognized fact that radio he quency electricity can be conveyed only a limited distance as it is dissipated in the air and becomes ineffective. It is also a wellrecognized. fact that the installation necessary' to supply raolio'frequencyv electricity for a number of printing presses would be costly.

In carrying out my invention, to overcome the hereinbefore recited objections and to provide improved means for anti-offsetting, I provide a portable container 14 carried by a vehicle or truck 14* suitabl mounted on rollers 15 or equipped wit suitable means to render it portable for movement about the printing shop as desired. Within the container 14 is mounted suitable means for furnishing a radio frequency current. Connection 16 adapted for insertion in an ordinary electric light socket, furnishes the source of ener to the transformer A which is in the true 14. Leading from the secondary portion of the transformer are the wires 17 and 18 having a spark gap 19 interposed therebetween;

Each ofthe wires 17 and 18 terminates in a condenser, the leads of which are connected to a Teslaf coil '20, and from which coil conductors 12 and 13 extend for connection to the binding posts and 11, on the board 9. If desired more than a single pair of conductors 12 and 13 may be led from the :lesla coil 20 to serve more than one printmg .press. Where the presses are arranged in battery form, it is possible to move the container 14 between adjacent presses and connect each press withthe source of radio quenc current therein. It will be observed t at by mounting the radio frequency generating apparatus in a portable container it is possible tomove the same about the shop at will, and to make-the conductors which convey the radio fre quency current as short as is consistent with the installation of the same, so that. the loss of radio frequency current is reduced to a Furthermore, the use of my apparatus removes any chance for injury to the operators. It is possible to grasp the conductors l2 and 13 with the .bare hand without feeling any electrical efi'ectwhatsoever except warmth. The 0 .ration of the corona dischar e is observe at. the terminals of the con uctors' 12 and 13, which,

of course, are insulated wires, as well as at the antennae. It is the corona discharge.-

that makes the ozone for ogridizing the ink on the newly printed, sheet 5 as the same is being conveyed from the rolls to the pile table. If desired, by increasing the efficiency of the radio frequency current generating system, as many pairs of conductors as'desired may be led from the truck 14.-

Itis a well recognized fact that it is' not always necessary to provide means for antiofisetting the sheets being printed as weather conditions control to some extent, as does radio frequency current, a portable support for said last-named means, and means for detachably connecting said radio frequency current. generating means with said ozone generating means.

2. The combination. with paper handling mechanism, of means for generating ozone, said means being supported ad'acent the path of the paper handled by t e mechanism, and means for generating radio frequency c'urrent associated with said ozone generating means.

'3. The-combination with paper handling mechanism, of means for generatm ozone, said means comprising a p uralitg o spaced electrodes located in a plane, sai electrodes being placed parallel'to and adjacent the.

path of the paper handled by the mechanism, and means for generating radio fre-.

quency current associated with said ozone generating means.

Sliged at Chicago, lllmois, this 25th day of rch, 1921.

' JOSEPH R. BLAH-E.

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