US1115551A - Method of embossed printing. - Google Patents

Description

F. LAMEY.

METHOD OF EMBOSSED PRINTING.

APPLICATION FILED Ammo, 1914.

Patented. Nov. 3, 1914.

FRITZ LAMEY, 0F MU'LHAUSEN, GERMANY.

METHOD OF EMBOSSED PRINTING.

Specification of Letters Patent.

Patented NOV. 3, 1914.

Application filed April 20. 1914. Serial No. 838.173.

'1 '0 all 007mm 1' 27 may concern Be it known that I, Fnrrz Lamar. a subject of the Emperor of Germany, residing at 9 Spiegelvorstadtstrasse, Miilhausen, Alsace, Germany, have invented certain new and useful Improvements in Methods of Embossed Printing; and I do hereby declare the following to be a full, clear, and exact description of the invention.

In known methods of embossed printing, whether in relief or in intaglio, the paper is previously moistened by the application of either water or steam. hen two or more colors are used in the printing it is in most cases necessary to allow the paper to dry between the different color impressions, in order to prevent the off-set of the first printed color onto the printing mechanism of the next following color. The drying of the color impression has been accomplished by means of a stream of cold and dry air, or

by means of a highly heated current or jet of air directed upon the sheet of paper as it passes from one color set to another, in

the press. By reason of this drying the paper shrinks unevenly and draws, so that it is very difficult or impossible to maintain the register of the colors or partial designs with respect to one another.

The present invention makes use of the customary drying of the ink or impression l')t\-'\C8I1 different successive color impressions, and in addition thereto maintains the paper as moist as possible, and as pliable as possible. ThisI accomplish by cooling the back of the sheet or web of paper only. This may be done by applying moisture to the back only, while the face of the sheet or web of paper carrying the impression is dried by a drying current of air, which may be either hot or cold. This current of air thus dries the color, but not the body of the paper. The cooling of the back of the sheet or web may be accomplished in many ways, depending upon the structure of the press being used. If the paper does not travel over intermediate carrying or guide rolls between the impression cylinders, then the cylindrical platen is cooled by a suitable medium, cold water, cold air, or other well known media, to a low temperature. This temperature will depend upon the number of color impressions to be given the web or sheet, somewhat upon the atmospheric conditions, temperature of the work-room, com position of the ink, &c.

. cylinder.

But I havefonnd that when working with two color impressions a low temperature is suitable. If intermediate carrying or guide rolls are present on the press which prevent the sheet or web from contacting with a material portion of the platen cylinder, the desired cooling or moistening is accomplished by blowing onto the back of the sheet or web a ciurrent of cold moist, or damp air, or 'wet or primed steam, or atomized or nebulized water, or the surfaces of the guide rolls themselves (which contact only With the back of the paper) may be moistened, and thus carry the moisture to the paper as it passes over them. The fundamental idea is to prevent the paper from drying out, while drying the im ression thereon sufficiently to prevent its 0 set on the next following impression cylinder.

In the drawing Figure l is a side View, and Fig. 2 is an end view of a well known type of press adapted to carrying out my invention, and in which I llZtWEb illustrated two sets of color trains and their pertaining impression cylinders and platens, indicated by A, B. On the left side of the Fig. 1 there is represented one form of the cooling device according to my invention different from that on the right side of Fig. 1 for the next following impression. In the first case I use an intermediate pressing roll I; the surface of which may be moistened by blowing onto the same a current of atomized water, carrying the moisture to the back of the sheet as it passes over the impression In the other case, if no intermediate guide or pressing roll is employed, the platen-cylinder c is cooled by cold water jets issuing from a perforated pipe d, which is supplied with the cooling medium by the pipe 6, connected with the main supply pipe 6; This main pipe 6 also feeds through the pipe 6 the intermediate pressing roll I), if any, and furthermore the cooling cylinders f and g by the pipes 6 and e,, which cylinders are arranged according to my invention to further cool the back of the sheet .9 or web between the one color impression and the next following color impression. Each of the pipes e, and e, are perforated at their the impression.

passed the cooling cylinder f the drying device k, blowing onto the printed s1de of the paper a stream of hot air, and drying the color impression, without totally drying out the paper. To increase the degree of moisture the sheet may be once more moistened by blowing some water onto the back of the paper by means of a further spraying device 5 for supplying with atomized water or damp steam by the pipe 6 The number of the cooling devices depends upon the structure of the paper and other circumstances as above mentioned.

I claim as my invention:

1. The method of multi-color printing, which comprises drying an impression sufficiently to prevent its off-set at the following impression, while maintaining the moisture content in the paper sufiicient to prevent the distortion or drawing of the paper which destroys the register of the impres: slons.

2. The method of multi-color printing, which comprises drying an impression sufficiently to prevent its off-set at the following impression, while maintaining the moisture content in the paper by cooling sufficient to prevent the distortion or drawing of the paper which destroys the register of 3. The -method of multi-Tcolor printing, which comprises drying an impression sufficiently-to prevent its olf-set at the next following impression, while cooling the back of the sheet or web to maintain a sufiicient content of moisture therein.

4. The imethod of multi-color printin which comprises drying an impression su ficiently to prevent its olf-set at the next following impression, while cooling the back of the sheet or web by moistening the same With water to prevent distortion or drawing of the paper.

5. The method of multi-color printing, which comprises drying an impression sufficiently to prevent its off-set at the next following impression, while cooling the back of the sheet or Web by moistening the same with water in a finely divided condition,

to maintain a suflicient content of moisture therein. I

6. The method of multi-color printing, which comprises drying an impression sufficiently to prevent its off-set at the next f0l-' lowing impression, while cooling the back of the sheet or web by moistening the same with an atomized or neutralized spray of water to maintain a sufficient content of moisture therein.

In testimony whereof I have name to this specification,

of two subscribing witnesses.

- FRITZ LAMEY.

signed my Witnesses WOLDEMAR HAUPT, RICHARD GoETz.

in the presence

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