US2095075A - Master copy sheet and method of preparing the same - Google Patents

Description

Oct. 5, 1937. G, G NElDlCH 2,095,075

MASTER COPY SHEET AND METHODOF PREPARING THE SAME Filed Nov. 22', 1935 llllhin. "llllln lllllm ATTORNEY.;

Patented Oct. 5, 1937 PATENTv OFFICE MASTER COPY SHEET AND METHOD OF PREPARING THE SAME George G. Neidlch, Nutley, N. J.

Application' November 22, 1935, Serial No. 51,016

9 Claims.

This invention relates to improvements in master copy sheets for use in the so-called spirit reproducing process and to methods for producing such master copy sheets.

Heretofore in the practice of the so-called spirit reproducing method, master' copies of the matter to be reproduced have been made in a manner which is comparatively costly. 'I'he sheet of material to be used as the master is placed against the coated surface of a specially prepared dry coated transfer sheet and then the matter to be reproduced has been transferred by pressure and counteradhesion upon the exposed surface of the master sheet. The coating on the transfer sheet is in the nature of an ink compound. The result of this step is to produce on the opposite surface of the master sheet a copy in mirror reverse of the matter impressed on the exposed surface of the master sheet, such copy being the result of the transfer of ink compound from the dry coated transfer sheet to the master sheet. Such transfer necessarily requires considerable pressure in the step of impressing the matter to be reproduced on the master sheet. 'Ihe dry coated transfer sheet used in this process of preparing master sheet is relatively costly and the practice itself increases the necessary cost due to the fact that the major portion of the dry coated transfer sheet is wasted. A dry coated transfer sheet can be used only once, since it isv essential for the coated surface thereof to be unbroken when the master copy is being transferred to the master sheet, otherwise a complete mirror reverse copy could not be transferred.

' Since the major cost involved in the dry coated transfer sheet is the coloring material used therein, and since only a relatively small portion of the coloring material is utilized in the transfer,.it becomes apparent that the waste involved is considerable.

An object of the present invention is to provide a master sheet so produced as to reduce the necessary cost to the absolute minimum.

Another object of the invention is to provide new and simple methods for producing master copy sheets at small cost.

A further object of the invention is to provide l`a method for producing master copy sheets in i such fashion that substantially no waste of color- ."ying material is involved.

A further object of the invention is to reduce L the amount of pressure necessary to. impose the (Cl. i1-31.5)

broken and more concentrated coloring surface on the master copy.

A further object is to provide a-method of building up a greater volume of coloring surface on the master copy.

In carrying out the above and other objects of the invention, it is intended that a master copy sheet be made in such fashion that on one surface of the master copy sheet will be found an outline of the matter to be reproduced in mirror reverse and represented by deposited adhesive material. To this adhesive is applied a suitable coloring material such as an aniline dye, such coloring material being in a quantity sufficient to adhere closely to the adhesive and in some events to entirely permeate the adhesive.

The adhesive outline in mirror reverse on the master sheet can be accomplished in a number of ways. In one method, a printing plate having the matter to be reproduced thereon can be made with the matter in positive form instead of in mirror reverse form, as is customary. The master can then be made by printing with this plate onto one surface of the master copy sheet, using, instead of coloring material, a suitable adhesive. As soon as the adhesive representation has been deposited on the surface of the master copy sheet this outline can be processed to render it suitable to the so-called spirit reproduction process. In order to accomplish this result substantially dry finely powdered ink, preferably some aniline dye, is in some manner sprinkled on the surface of the master copy sheet having the adhesive representation thereon, whereby the ink adheres to the adhesive. The surplus of powdered ink can be removed from the surface in any suitable fashion. If desired the ink coated adhesive representation can be subjected to suitable pressure to cause the ink to thoroughly permeate the adhesive material. 'I'he master copy sheet is then ready to be used in the usual spirit reproduction manner.

In the preferred form of the invention, however, use is made of what for simplicity may be called carbonless carbon sheets. These sheets comprise thin sheets of paper or other suitable material, one side of which is coated with a suitable adhesive material. A carbonless carbon sheet so made is substituted for the customary dry-coated transfer sheet in the formation of a mirror reverse copy on one surface Iof the master sheet. 'Ihe master sheet is placed against the coated surface of the coated sheet of material, and the matter to be reproduced is impressed or imposed on the exposed surface of the masterv sheet in the usual fashion.l Buch impressing of this matter results in the formation on the other surface of the master sheet of a mirror reverse copy represented by deposited adhesive due to the transfer of the adhesive from the coated sheet to the master sheet. This mirror reverse outline can then be treated in the manner before expinned, that is by dusting or otherwise spreading substantially dry powdered ink on the copy surface of the master sheet, causing the ink to adhere to the adhesive outline. Again pressure may be utilized to cause the ink to thoroughly permeate the adhesive outline. it being understood, of course, that the surplus powdered ink is brushed or otherwise removed from that portion of the .Y showing an assembly of coated sheet and 4master sheet.

Fig. 2 is a section taken Fig. 1.

Fig. 3 is a plan view of the same assembly showing the master to be reproduced impressed on the exposed surface of the master sheet.

Fig. 4 is a section taken substantially on the line 4-4 of Hg. 3.

Pig. 5 is a view of the under surface of the same master sheet showing the matter to be reproduced in outline thereon in adhesive. Fig. 6 is a section' taken substantiailyon the line 8 8 of Fig. 5.

Fig. 'I is a view similar to Fig. 5. showing the reverse outline with the ink applied thereto; and

Fig. 8 is a section taken substantially on the line 5 8 of Fis. '1.

Referring now to the drawing which for illustrative purposes shows the various sheets and other elements employed in the invention in great exaggeration, i0 indicates a sheet to be used as a master copy sheet. At I I is illustrated a sheet of on the line 2 2 of material. such as thin paper, one surface of which is coated with a suitable adhesive shown at l2. This adhesive may be of any desired composition so long as it is suitable for the purposes intended. An illustrative composition which in practice has been found to possess the-required qualities may be made up oi a combination of beeswax and common resin in various proportions. such as--10il parts of beeswax and 8 parts of common resin.

When it is desired to produce a master copy sheet for use in the particular process described..

the sheet of material \|8 is superimposed on the sheet ii, making contact with the coated surface I2 thereof. 'I'he matter to be reproduced is then impressed on the top surface of the master sheet in whatever fashion may be suitable for the particular purpose. In the drawing the matter to be reproduced has been shown as being im on the master sheet by means of a `pencil point. Of course this matter may be typewritten or otherwise Aimpressed on the master sheet. As the vresultoi impressing this matter to be reproduced on the master sheet. those portions of the mastersheetto whichthepressureisappliedare forced againstthecoated surface ofthe sheet Ii as illustrated in Fig. 2. This forceful contact between the undersurface of the master copy sheet and the coated surface of the coated sheet causes the adhesive coating to be deposited on and toadheretotheundersurfaceofthemasteroopy sheet only along the lines at which pressure hss been applied. When the complete matter to be reproduced has been impressed on the master sheet, the two sheets of material, i. e., the master sheet and the coated sheet, are separated. An inspection of the master copy sheet will reveal a mirror reverse outline in deposited adhesive of the matter to be reproduced on the former undersurface of this master sheet. By reference to Hg. 6 it will be seen that portions 2li of the adhesive material have become separated from the coated sheet and have adhered to the master sheet along the lines of impression. Thus. referring to Fig. 5 it will be noted that a mirror reverse copy of the vmatter to be reproduced in adhesive is present on the back of the master copy sheet.

To furtherv process this master copy sheet and render it adaptable for use for so-called spirit re production practice, suitable coloring matter, preferably in the form of substantially dry powdered aniline ink, is dusted on the back of the master copy sheet. In practice it has been found that crystal violet ink in dry powdered form is especially adapted for thel purposes of this invention. The powdered ink adheres tothe adhesive representation but will not adhere to the uncoated part of the back of the master sheet. As soon as a suflicient quantity of powdered ink has adhered to the adhesive outline the surplus may be removed in any suitable manner, leaving the back of the master copy sheet in form shown in Pigs. 'l and 8. where in Fig. 'I the mirror reverse of the matter to be reproduced is shown heavier than in Fig. 5, which represents simply the adhesive outline: and Fig. 8 shows a layer 2l of ink superimposed on theadhesive layer 20. Ihe master copy sheet so produced is then in proper form for use in so-called spirit reproduction process wherein the sheets of paper or other material upon which the matter is to be reproduced are fed through a machine to come into pressure contact with the ink mirror reverse copy with the copy sheet being moistencd with a suitable solvent Just prior to its contact with the ink outline. If desired. however. the master copy sheet in the form shown in Figs. 7 and 8 can be further treated before use by the application of suitable prsure to cause the layer 2i of ink to thoroughly permeate the layer 2li of adhesive.

The adhesive material as beforedescribed may be of any suitable composition, and it is contemplated that this adhesive may either be substantially colorless or may even have embodied therein suitable, coloring matter which will aid the action of the subsequently applied ink. This is particularly true Vin practice of the invention wherein a mirror reverse copy is formed directly on one surface of the master sheet by means of a plate and by means of adhesive taking the place of ink as is common in printing processes.

It is also contemplated that the master copy sheet can be made in other suitable manners, such as for example, by a preparation of special type on a special typewriter to produce a mirror reverse outline on a sheet of material using an adhesive impregnated ribbon in the place of an ordinary ink ribbon. The characters on the typewriter keys naturally would have to be spein reversed direction to the ordinary typewriter I claim:

1. The method of preparing a master eopyf""1s .Ti-ff sheet for use in spirit multiple reproduction processes which comprises producing on a master sheet a copy in mirror reverse of the matter to be reproduced, said copy being represented by deposited adhesive, applying a substantially dry powdered ink to the surface of the master sheet having the adhesive representation thereon so that the ink adheres to the representation, re-

moving the surplus powdered ink, and applying pressure to the master sheet to cause .the powdered ink to thoroughly permeate the adhesive material thereon.

2. The method of preparing a master copy sheet for use in spirit multiple reproduction processes which comprises placing a master sheet against a prepared sheet of material having an adhesive coating on one s'ide thereof, said master sheet being in contact with the adhesive coating, impressing the matter to be copied on the exposed surface of the master sheet whereby the copy of said matter is imposed in mirror reverse on the underside of said master sheet, said mirror reverse copy being represented by adhesive transferred to the master sheet, separating theV master sheet from the coated sheet, and applying ink to said adhesive representation in such fashion as to cause theink to adhere to the adhesive representation only.

3. The method of preparing a master copy sheet for use in spirit multiple reproduction processes which comprises placing a master sheet against a prepared sheet of material, having an adhesive coating on one side thereof, said master sheet being in contact with the adhesive coating, impressing the matter to be copied on the exposed 'surface of the mastersheet whereby a copy of said matter is reproduced in mirror reverse on the under side of said master sheet, said mirror reverse copy being represented by adhesive trans- 40 ferred to the master sheet, separating the master sheet from the coated sheet, and applying a substantially dry powdered ink to said adhesive representation to cause the powdered ink to ad- -here thereto.

4. The method of preparing a master copy sheet for use in spirit'multiple reproduction processes which comprises llal'af'ing a master sheet against a preparedsheet of material, having an adhesive coating on one side thereof, said master sheet being in contact with the adhesive coating, impressing the matter to be copied on the exposed surface of the master sheet whereby a copy of said matter is reproduced in mirror reverse on the under side of said master sheet, said mirror reverse copy being represented by adhesive transwhich comprises placing a masterv sheet against a prepared sheet of material, having an adhesive coating on one side thereof, said master sheet being in contact with the adhesive coating, impressing the matter to be copied on the exposed surface of the master sheet whereby a copy of said matter is reproduced in `mirror reverse on the under side of said master sheet, said mirror reverse copy being represented by adhesive transferred to the master sheet, separating the master sheet from the coated sheet, applying ink to said master sheet in such fashion that it adheres to said adhesive only, and subjecting said master sheet to pressure to cause the ink to permeate the adhesive. l

6. The method of preparing a master copy sheet for use in spirit multiple reproduction processes which comprises preparinga plate with the raised matter thereon formed as a printing positive, deposited adhesive through the agency of said plate onto one surface of a master copy sheet whereby a mirror reverse copy of the matter to be reproduced is represented on said sheet by the deposited adhesive, and applying a substantially dry powdered ink to said master sheet in such -fashion that said ink adheres to said positive representation only.

7. The method of preparing a master copy sheet for use in spirit multiple reproduction processes which comprises preparing a plate with the raised matter thereon formed as a printing positive, deposited adhesive through the agency of said plate onto one surface of a master copy sheet whereby a mirror reverse copy of the matter to be reproduced is represented on said sheet by the deposited adhesive, applying a susbtantially dry powdered ink to said master sheet in such fashion that said ink adheres to said positive representation only, and applying pressure to cause said ink to thoroughly permeate said adhesive.

8. The method of preparing a master copy sheet for use in spirit multiplereproduction processes which comprises producing on a master copy sheet a copy in mirror reverse of the matter to be reproduced by typing such matter onto the surface of said copy sheet through a ribbon coated with an adhesive whereby the copy is represented by the deposited adhesive, and applying substantially dry' powdered ink to the surface of said copy sheet vin such fashion that said ink adheres to said adhesive only.

9. The method of preparing a master copy sheet for use in spirit multiple reproduction processes which comprises producing on a master copy sheet a copy-in mirror reverse of the matter to be reproduced by typing such matter onto the surface of said copy sheet through a ribbon coated with an adhesive whereby the copy is represented by the deposited adhesive, applying substantially dry powdered ink to the surface of said copy sheet in such fashion that said ink adheres to said adhesive only, and applying pressure to cause said ink to permeate said adhesive.

GEORGE G. NEIDICH.

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