US1961828A - Process for producing wax carbon spots - Google Patents

Description

s sheets-Sheet 1 INVENTOR l d, izw

ATTORNEY I l June 5, 1934. G. A. RUTKosKlE PROCESS FOR PRODUCING WAX CARBON SPOTS original Filed April 14, 1931 Y MY hs.

June 5, 1934. G A. RUTKO5K|E 1,961,828

PROCESS 15CR PRODUCING WAX CARBON SPOTS Original Filed April 14, 1931 3 Sheets-Sheet 2 INVENTOR n Ivy/ @AMW Juney 5, 1934.

FIG 4.

G. A. RUTKOSKIE PROCESS FOR PRODUCING WAX CARBON SPOTS Original Filed April 14,

AAA

1931 3 Sheets-Sheet 3 INVENTOR 5 reference to the accompanymg drawings which Patented `:lune A5, 1934 UNITED STATES PATENT -OF FICE George A. Rntkoskie, Athens, Ohio, assignor to The McBee Company, Athens, Ohio, a corporation of Ohio Original application April 14, 1931, Serial No.

Divided and this application June 17, 1 933, serial' No. 676,292 l 5 claims. (ol. en -70)` ink plate and the especially heated lock-up base 4 necessary to maintain the ink plate, the type bed.

and the electrotype at a constanttemperature.

I have also discovered that if this temperature ls varied either above or below the critical degree Athat the operation will not be successful. For example, if it is too high, thewax carbon will crystallize and if too low it will turn into soot in the form of minute globules of carbon.

I have also discovered that unlike the ordinary zo press in which the printing cylinder .is covered with the usual draw sheet to use a soft packing which will provide an elastic cushion. If such a cushion is provided, it is possible to keep the edges 0f the printed form free from excess carbon and to produce a much better result.

My invention has for its object to provide a new and improved method of producing wax car-'- bon spots at predetermined locationsupon sheets of paper by applying it to the sheet of paper from an electrotype While reciprocating the electrotype at a tangent to the sheet and maintaining the electrotype at a predetermined temperature, while maintaining the carbon at a predetermined temperature continuously from the time it is rst melted until it is applied to the paper and maintaining all of the parts of the press which contact the wax carbon at thesaid predetermined temperature. A

A further object is to provide an elastic and compressible cushion to the printing cylinder so that it will prevent the )edges of lthe printed form from accumulating'excess carbon as it contacts the electrotype. v

My means of accomplishing the foregoing objects may be more readily understood by having are hereunto annexed and made a part hereof, in which- Fig. 1 is a top o r plan view of a portion of a press equipped with my improvement;

Fig.`2 is a fragmentary detailed view showing the printing cylinder vand the reciprocatingtype bed:

Fig. a is a top i pla'r or the bed or the press showing the arrangemen for heating the and means for obtaining electrical contacts for the elements on the ink plate and lock-up base;

Fig. 4 is an enlarged sectionof the sliding contacts on the line 4 4 in Fig. 3 showing the carbon brushes; and

Fig. 5 is a perspective View` of form after it has received the spot carbon impression.

Similar reference numerals refer to similar parts throughout the entire description.

I have shown in the drawings a standard Kelly type of press in which the typ'e bed 1 has mounted upon it a special lockup base which is heated by electric elements 3. As shown there are four of the special these elements and they are connected to a control circuit by means of sliding contacts 4 which are mounted in a gutter 5, suitable insulation 6 being provided to insulate the electric current, Where electric current is used to furnish the heat.

'I'hree carbon brushes 7 are provided /to make contact with the sliding contacts 4, the` brushes are held in contact by means of coil springs 8 which are mounted in caps 9 ofthe standard construction for this purpose, so as to provide means to regulate the tension which the springs exert upon the carbon portion.

It is well known that the type bed of the Kelly -press is reciprocated as^the printing takes place and when electrical apparatus such as the hereinbefore described is employed, it will be apparent. that it can be reciprocated without in any manner interfering with the effectiveness of the electrical contacts which carry the current vto the 'heating element in the lock-up base, the heating of which will also heat the electrotype which is bolted to the base.

As hereinbef ore set forth, I have discovered that a. wax carbon has a critical temperature at which it Acan be used, for this purpose, and a variation either direction is disastrous to the accomplish- Agicht of the .desired result. As a consequence the ink plate 10 must also be heated. As shown it is heated by an electric element 11 which is connected to the sliding contacts 4 and is controlled by the same switch 12 which conveys current to the carbon brushes?. This switchis ofa standard type providing three positions-high, medium 'and low-so that varying degrees' f temperature for the heating elements 3 and 11 can be Inaintained.

The ink fountain 13 from which the wax car-.

bon is distributed to the roller'mustnecessarily be heated as the dry wax ear n compound is first placed in it. As illustrated t is heated by a heat` hereinafter contained claims.

ing element 14 located directly under the ink impossible to run the paper with satisfactory refountain, this heating element being suitably consult over the ordinary printing cylinder 50 which nected through a standard switch 15. is equipped with a draw sheet as in standard prac- When the compound has been melted it is septice and it has been found necessary to provide arated by the ink fountain roller 16 and carried to some sort of an elastic and compressible cushion a steel vibrator 17 by the ductor roller 18 which for, as' hereinbefore-set forth, unless some sort of as is set forth in my hereinbefore named applicacushion is provided it is almost impossible to protion is preferably formed of a special composition duce a satisfactory result since the edges of the which will stand approximately a Jtemperature of printed form will accumulate an excess amount 200 degrees F. The melted compound is diS- of carbon. tributed to` form rollers and thence to the ink I have found the most satisfactory covering to plate in the usual manner except that as set forth be a soft felt packing although other types of in my above named patent and application I have cushioning material may be found desirable in discovered that it is essential that these rollers be practice and I do not wish to be understood as positively driven at the time of contact and durlimiting myself to any specific type of cushion ing the contact, but as this feature is covered in for this purpose. the said application of which this is a division, I I have discovered in practice that it takes apshall not enter into a detailed description of this proximately 'one and a half hours to heat the feature of the method. compound, press, and rollers to the right work- I have also found that it is essential to provide ing temperature and it is therefore desirable to means to receive the excess carbon and carry it f make provision for heating the various parts besafely away from the rollers and `I accomplish this fore attempting to make a run. by providing a shield 43 preferably made of cold It is also found desirable to clean the printing rolled steel. The bottom part Vof the shield which. plate before riinning the stock after the press has is nearer to the adjacent roller extends out about been standing idle, if the heat has been turned three quarters of an inch to form a drip pan 44. on to the type bed or lock-up base. This precau- On one Side of this pan I mount two drain tubes `tion must be taken for the reason that the carbon 45 which serve to carry off any of thefmelted in the compound will. burn out around 200 decompound which may drop from the ductor roller grees F. and if this should happen you'may run 18, which can easily happen if more compound several impressions which will look right but will is allowed t'o come through the fountain than can vnot make a copy thereby being useless for the be taken care of conveniently by the ductor roller purpose for which they are intended.

18. The other end of the pan is closed so that no Wax carbon can escape from that end. An exten--A to melt the compound before putting it in the sion 46 is attached to the shield and Yextends to ink fountain 13 but also that doing so permits the rear end of the press and directly under the the compound to be inspected for any hard partiink fountain 13. This extension forms a drip cles that it may contain. I have also obtained pan which will catch any of the compound which the most satisfactory results by keeping the enmay drop from the ink fountain. 13. I have distire unit at the lowest temperature at which the covered that these drip pans are very,J essential to wax carbon i is workable rather than at the the success of any good Work for if any compound highestt comes in contact with the bare elements it will The provision of the shield 43 and drip pans 44 immediately crystallize and if this crystallized and 46 provide for an added economy by taking wax should come in contact with the printing. care of the vcrystallization of the Wax and by plate 47 it will stick to theplate and each particle melting the compound, thus secured, in a vessel of this crystallized compound will cause the good and Strainingrit through a very fine brass strainer compound to separate and will make a `spotted before replacing it in the ink fountain, it is posprint instead of a solid one. By the construction sible to eliminate any hard particles from the thus described the shield 43 and the expansions 46 compound not only prevent any excess carbon from contact- Althllgh I have' described a Specific fOIm 0f ing with the heating elements and then 4being thus apparatus in this specification and illustrated it crystallized. but it also holds it until it is removed in the drawings, I wish to be understood that my or if it is melted :it will drain through the drain invention is not limited -to any specific type of pipe 45 which can be arranged to drop .into any apparatus for it is'clear that many different forms convenient receptacle (not shown) outside of the 0f apparatus may be employedwhich will utilize press. This not only assists in keeping the work 'my method and I do not wish to be understood clean but saves any excess'compound that may be as limiting myself to the specific form thus disthrown from the ductor roller or the ink fountain closed except as such limitations may appear in the hereinafter appended claims.

Having described my invention what I regard as new and desire to secure by Letters r,Patent is: 1. In the process of producing wax carbon spots roller 13.

As illustrated, I have shown a special lock-up base mounted upon the type bedplate 47, a complete description of which is to be found in the above named patent. As it forms no part of this-` upon sheets of paper, ythe steps of heating the invention I shall not enter into thedetailed. Idewax carbon to a predetermined temperature; -apscription of it for any form of lock-up base may plying the melted wax carbon to a sheet of paper be employed, as desired, without deviating from by means of an' electrotype; providing'a cushion the scope of my invention as described in. the for Athe paper while in contact with the electrotype; and maintaining said electrotype at a predetermined temperature.

I also have discovered that it is'noft''nly pref- 2. In theprocess of producing wax: carbon spots erable but almost essential to have the face ofv the printing plate 4 7 nickeled and polished as upon sheets ofpaper, the steps of heating the wax lthey are not so finished.

this produces a very much smoother finish and a carbon to a predetermined temperature; applying much more even one for the carbon than where the melted wax carbon toa sheet of paper by means of an electrotype; and cushioning said I have found in practice, that itis practically paper during its contact with said electrotype.

I have also found that it is not only a time saver 3. In the process of producing wax carbon spots upon sheets of paper, the steps of heating the wax carbon to a predetermined temperature; appig-ving` the melted wax carbon to a sheet of paper by means of an electrotype; cushioning said paper and during its contact with said electrotype; and carrying away any excess of crystallized wax.

li. In the process of producing wax carbon spots on sheets of paper, the steps of heating the wax carbon to a predetermined temperature, applying the melted wax carbon to the paper by means of an electrotype, providing the printing cylinder GEORGE A. RUTKOSKIE.

Images