US2061984A - Apparatus for presses for producing wax carbon spots on sheets of paper - Google Patents

Description

Nov. 24, 1936. a ARUTKOS'KIE 2,061,984

APPARATUS FOR PRESSES FOR PRODUCING WAX CARBDN SPQ'I'S ON SHEETS OF PAPER Filed May 8, 1934' I 3 Sheets-Sheet 1 1 1 INVENTO I I BY I 5 2 TORNEY NOV 36- jAQRUTK'OSKIE 7 2 84 t w APPARATUS fF R PRESSES F03 pno'btjcmwwgx cAnoniSPowsbn HEET OF PAPER 1 Filed May' a, 1934 I 3 Sheets-Shet 2 ATTORNEY f I INVENTO I I Nov. 24, 1936. e. A. RUTKOSKIE 2,061,984 I APPARATUS FOR PRESSE'QS FOR PRODUCING WAX CARBON SPO'i'S ON SHEETS OF PAPER Filed May 8, 1954 3 Sheets-Sheet l5 INVEIgO BY I TORNEY Patented Nov. 24, 1936 UNITED STATES PATENT OFFlCE APPARATUS FOR-.PRESSES FOR PRODUCING.

WAX CARBON SPOTS ON SHEETS OF PAPER tion of Ohio Application May 8, 1934, Serial No. 724,542

My invention relates to that class of devices described in Patent 1,930,429 dated October 10, 1933, and more particularly described in my copending application now Patent No. 1,961,828,

the present application being designed to cover the certain specific elements which may be utilized in following my method.

As set forth in that application I have discovered that the impression cylinder covered with the usual draw sheet in the ordinary printing press will not produce the proper work and that it is essential to provide an elastic cushion formed of some sort of soft packing to cover this impression cylinder. If such a cushion is provided it greatly improves the quality of the work produced as the edges of the printing form will be entirely free from excess carbon. It has also been I found in practice that there is considerable danger of the melted wax carbon dropping or being thrown from the ink fountain roller, ductor roller and the distributing or vibrating roller and that unless provision is made for shielding the operating parts of the press from this carbon it causes a great deal of diiiiculty and entails a. great deal 25 of labor in cleaning it.

- My invention has for its object to provide an elastic and compressible cushion for the impression cylinder so that the edges of the printed form will not accumulate any excess carbon during the 30 printing operation.

A further object is the provision of shield and drip pans whereby any excess wax which drops from the rollers or the ink fountain may be carried away from the press without coming in con- 35 tact with the mechanism thereof.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings, which are hereunto annexed and are a part of this specification, in which Fig. 1 is a top or plan view of an ordinary automatic feed printing press, equipped with my improvement;

Fig. 2 is a fragmentary detail view in perspective with the rollers thrown back so as the shield in the press;

Fig. 3 is a perspective view of one of the shields removed from the press;

50 Fig. 4 is a cross section of the shield;

der; and

Fig. 6 is a vertical cross section of the same through a portion of the bed plate and the electrotype. Similar reference numerals refer to 55 similar parts throughout the entire description.

to show Fig. 5 is a detail view of the impression cylin- As shown in the drawings, a standard Kelly type of press is illustrated; This press is fully described in the above mentioned patents, and I shall not therefore duplicate the description.

The press is provided with an ink fountain i from which the wax carbon compound is distributed to the ink fountain roller 2. Electrical heating elements 2' and 2" are provided to melt the wax carbon compound in the ink fountain which are located below the ink fountain. When the compound has been melted it is separated by the ink fountain roller 2 and carried to a steel vibrator 3 by means of a ductor roller 4. The melted compound is distributed by the vibrator roller 3 to the form rollers and thence to the ink plate in the usual manner except as set forth in the application above referred to. I have discovered that it is essential that these rollers be positively driven up to and during the time of 7 contact with each other. This I accomplish by means of gears fitted upon the shafts of these rollers. However as this feature is covered by my prior patents I shall not enter into a specific detailed description of their operation.

As shown in Fig. 1 of the drawings, the press is provided with an impression cylinder 5. This cylinder is mounted upon a shaft in the usual manner and is adapted to roll upon the face of an electrotype 2! which is secured to the bed plate 22 of the press in the usual manner. The paper (not shown) passes intermediate the face of the electrotype 2i and the periphery of the impression cylinder 5. This cylinder is equipped with a draw sheet 6 as in standard practice. Underneath the draw sheet I provide an elastic and compressible cushion 1. When the carbon is deposited upon the paper if the impression cylinder is not provided with such a cushion the wax will pile up an excess of carbon on the edges of the spot and will sometimes produce a job which cannot be used.

In practice I have found the most satisfactory cushion to be a soft felt packing although other types of cushioning material may be found desirable and, I do not wish to be understood as limiting myself to any specific type of material to -be utilized for this purpose. After the layer of felt packing 1 is placed around the cylinder the standard or customary draw sheet 6 is placed over it and the cylinder is then ready for use.

My means of caring for the excess was compound is clearly shown in Figs. 2, 3 and 4 in which I provide a shield 8 preferably made of cold rolled steel. This shield covers an electric heating element I! which I mount in place of one of the standard rollers. The bottom part of the shield 8 which is nearer to the form roller 9 extends suiiiciently below the roller to form a drip pan 10. On one end of this pan I mount a drain tube II which serves to carry off any of the melted wax compound which may drop from the form roller 9. The other end of the pan I0 is closed by a wall ll so that no wax carbon compound can escape from that end. A drain pipe I8 is provided to carry the melted wax carbon compound away from the press. An extension, which forms another pan I2, is attached to the shield and extends to the rear end of the press and directly under the ink fountain. This extension I! is provided with end walls I9 which thus form the drip pan which will catch any of the compound which may drop from the ink fountain, ink fountain roller, the ductor or vibrator rollers which can easily happen if more wax compound is allowed to come through the fountain than can be taken care of conveniently by the roller. I have discovered that these drip pans are very essential to the success of any good work for if any compound comes in contact with the bare heating elements l3 it will immediately crystallize and if this crystallized wax should come in contact with the printing plate it will stick to theplate and each particle of this crystallized compound will cause the good compound to separate and will make a spotted print instead of a solid one. By constructing the shield as illustrated and connecting the pan ID with the extension by inclined walls l4 and I5 these walls not only prevent any excess carbon from contacting with the heating elements and then being thus crystallized, they direct the wax carbon into the pans Ill and I2 which hold it until it is removed or if it is melted it will drain through the drain pipes l1 and I 8 which can be arranged to drip into any convenient receptacle (not shown) outside of the press. This not only assists in keeping the work clean but saves any excess compound that may be thrown from the rollers.

From the foregoing description it will be seen that the provision of the shield and drip pans provides for an added economy by taking care of the crystallization of wax which can thereafter be melted in a separate vessel. By straining it through a very fine brass strainer before replacing it in the ink fountain, it is possible having an ink fountain,

to eliminate any hard particles from the wax compound.

Having described my invention what I regard as new and desire to secure by Letters Patent 1. The combination with a printing press for printing wax carbon spots on sheets of paper,

an inking fountain roller, distributing rollers and a ductor roller, mechanism to actuate the same, electrically heating elements below the ink fountain and an electrically heating element which extends across the press mounted below and adjacent the rollers; a combined shield and drip pan which covers said element, said shield having inclined walls in front and at the rear of said element, the lower edges of which are bent upwardly to form drip pans, end walls which close the ends of said bent portions, and drain pipes mounted in said end walls to carry away the excess wax carbon.

2. In a printing press for printing wax carbon spots on sheets of paper, having an ink fountain, an ink fountain roller, distributing rollers and a ductor roller. mechanism to actuate the same, a type bed, electrically heated elements below the ink fountain and an electrically heated element which extends across the press mounted below and adjacent the rollers; an impression cylinder in said press comprising a cushion of felt which extends around the periphery of said cylinder, and a covering for said felt, said impression cylinder impressing a sheet against said bed whereby the paper is cushioned during the printing operation.

3. In a printing press for printing wax carbon spots on sheets of paper, having an ink fountain, an ink fountain roller, distributing rollers and a ductor roller, mechanism to actuate the same, a type bed, electrically'heating elements below the ink fountain and an electrically heating element which extends across the press mounted below and adjacent the rollers; an impression cylinder for a printing press for printing spots on wax carbon, the periphery of said cylinder being covered with a cushion of elastic and compressible material, said impression cylinder impressing a sheet of paper against said bed whereby the paper is cushioned during the printing operation.

GEORGE A. rw'rxosm.

Images