US2052293A - Process of typographic reliefing - Google Patents

Description

Aug. 25, 1936. E. M. HENSLEY PROCESS OF TYPOGRAPHIC RELIEFING Filed June 23, 1954 INVENTOR. 5M

ATTO EYS.

Patented Aug. 25, 1936 U I I I UNITED STATES PATENT ()FFIQE PROCESS OF TYPOGRAPHIC'RELIEFING Edward M. Hensley, Chicago, Ill. 7 Application June 23, 1934, Serial No. 732,084 1 4 Claims. (clan-25.5)

This invention relates to a process of mechaniing this effect is by" pasting bits of paper on a cal reliefing previous to typographic printing and sheet previously printed from the form so as to particularly to a process of obtaining an overlay obtain graduated reliefs in different points acfor printing half-tones. cording to the effects desired. This is a tedious 5 A principal object of the invention is the proand lengthy operation and requires the utmost 5 vision of a new and improved process for fixskill and ability. 1

ing the granular overlay material so as to prevent Another well known process is to sprinkle a the same from crumbling or becoming otherwise resinous granular powder over an impression upon displaced in use. a relatively thinfoundation sheet obtained from 1 Another object of the invention is the provithe inked form, which powder adheres more sion of a process which includes the steps of densely and to a greater depth where the ink soaking a relatively thin sheet of tissue or the impression has the greater area. like in a fixative oil and applying it over a gran- The present invention is an improvement over ular overlay material, the thin tissue conforming this last mentioned process 'and includes the follii to the contour and relief of the overlay, and a lowing steps: After the printing form containing certain amount of the oil carried thereby being half-tone plates is arranged in position and all absorbed by the overlay materialitself so as to plates leveled and made type-high, the form is bind the particles thereof together. carefully and thoroughly inked with a special A further object of the invention is the'prOvioverlay ink. Abouttwice as much ink'is used as sion of a process of the character described in would be used for regular printing} After allow- 20 which a relatively thin sheet of tissue or the like ing the ink tostand on the form for from two to is sprayed with a fixative oil and superposed on four-minutea a printing impression is made on a the overlay material, the oil not only rendering special overlay parchment indicated by reference the tissue pliable so that it will closely follow the numeral II in the drawing, wherein the deposits contour or relief of the overlay but also a certain of ink forming this impression are represented at 25 amount of the oil soaking through the tissue and [2. This parchment l l is preferably relatively combining with the overlay material so as to fix thin, transparent, and non-absorbent. Colored the same. This spraying operation also exerts a overlay which is preferably of a resinous granugentle but uniform pressure upon the surface of lar matter in grains of convenient size and free no the tissue such as will insure that it closely conof dust, is then carefully spread over the impresform to the contour and configuration of the unsion thus obtained on the parchment to a thickderlying overlay material. ness of substantially one-fourth inch. The sheet A further object of the invention is the provi- II is then tilted to allow the excess granular masion of a process of the character described, in terial to slide off into a container for future use,

3.", which the powdered materials may be sprayed the remainder of the granular material adhering with a fixative oil and a thin sheet of tissue placed to the inked impression I2 is indicated at l 3. thereon. Following this, a relatively thin layer of white Numerous other objects and advantages of the inert powder, such as flour or the like, is applied invention will be apparent as it is better underover the colored overlay material, and is disstood from the following description, which, tributed evenly with a relatively fine brush, care 40 taken in conjunction with the accompanying being taken not to scratch or dislodge any of the drawing, discloses a preferred embodiment thereunderlying colored overlaymaterial. The excess of. white powder is then shaken oif and discarded In the drawing, the single figure is a highly leaving a thin layer It on the deposited granular magnified vertical sectional view of an overlay material I3. 45 prepared in accordance with the instant process. Following these steps, a sheet of overlay tissue To prepare for printing off it is usual toplace I5 is thoroughly soaked with an overlay fixative on the surface of the cylinder which is to receive oil, such as a mixture of toluol oil, castor oil, and the sheet of paper to be printed through preslubricating oil in the approximate ratio of '7 to 3 sure against an ink form, a number of reliefs to 1, respectively, and any surplus oil carefully 50 which force the paper to project to a greater wiped off. Care must be taken sothat the proper extent in such places Where a very black print is amount of fixative oil is spread on the sheet, as desired. Such reliefs raise the paper more or an insufficient amount will permit the powdered less according to the greater or lesser effect deor granular overlay to crumble and an excess sired at a given point. One method of producquantity will tend to soften the same. 55

The oil saturated tissue is placed over the overlay material l3, M-the oil combines with the white powder, making it sticky or paste-like. The overlay is then secured in position under three or four sheets of packing and the tympan and the overlay is ready for a printing operation.

If desired, the tissue l5 may first be positioned over the overlay material I3, I4 and subsequently sprayed with the fixative oil, or the powdered material may be sprayed with the fixative oil and the tissue placed thereon. In either case a certain amount of the fixative oil is absorbed by the underlying granular overlay material so as to bind the particles thereof together and prevent subsequent crumbling.

Moreover, the relatively thin tissue I5 is rendered so soft and pliable that it closely and accurately conforms or clings to the irregularities in the contour and configuration of the overlay material, not only by coherence but also under the action of the spray, when employed. In either event the overlay presents a continuous surface of a relatively permanent nature, the tissue l5 forming a film or skin over the entire overlay. This film or skin not only materially reinforces the granular base of the overlay and increases its life, but it also renders the prints received from the form more clear and distinct.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the steps and their order of accomplishment of the process described without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the process hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A process of typographic reliefing, which consists in obtaining an impression from an inked form upon a foundation sheet, dusting the printed surface of the sheet with a resinous powder so as to cause the ink to fix said powder throughout the impression proportionately to the density of the ink thereon, saturating a sheet of tissue with an overlay fixative oil, and securing the soaked sheet in position over said powder.

2. A process of typographic reliefing, which consists in obtaining an impression from an inked form upon a foundation sheet, forming a relief overlay by dusting the printed surface of the sheet with a resinous granular substance so as to cause the ink to fix said powder throughout the impression proportionately to the density of the ink thereon, positioning a sheet of tissue over said relief overlay, and subsequently spraying the same with a fixative oil, whereby said sheet is rendered pliable and is pressed into intimate contact with all'portions of said overlay material so as to conform to the contour and configuration thereof and whereby a certain amount of the oil absorbed by said sheet is transferred to the granular substance of said overlay so as to bind the particles together.

3. A process of typographic reliefing, which consists in providing an overlay of granular material, saturating a sheet of tissue in a fixative oil, and positioning said tissue over said overlay, whereby a certain amount of the oil carried by said tissue will unite with said granular overlay and bind the same together.

4. A process of typographic reliefing, which consist in providing an overlay of granular material, positioning a sheet of tissue over said overlay, and spraying said tissue with a fixative oil, whereby said tissue is rendered pliable and forced into intimate contact with all portions of said overlay so as to conform to the relief effect thereof, a certain quantity of the oil carried by said tissue being absorbed by said granular overlay so as to bind the same together.

EDWARD M. HENSLEY.

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