US325353A - Copying process - Google Patents

Description

(No Model.)

W. G. MORSE.

COPYING PRoeEss.

Patented Sept. l, 1885.

Fig. 2v.

WIUVEES MENTE MQ@ /wya/FMM/ 85mm' Nrrnn *raras VALDO G. MORSE, OF ROCHESTER, NEV YORK.

COPYING PROCESS.

SPECIFICATION forming part of Letters Patent No. 325,353,61ated September l, 1885.

Application filed May (i, 1984.

To all whom it may-concern:

Beit known that I, WALno G. Mouse, of Rochester, New York, have invented au Im proved Copying Process, of which the following is a specification.

Myinvention relates to an improved process of copying writings and drawings, whereby a large number of fac-similes can be produced,

which process is fully described in the aceompanying specification.

I have represented in the accompanying drawings a copying-pad suitable for carrying my improved process into effect.

In the drawings, Figure l represents a double or two-page pad opened, and Fig. 2 is a transverse section of the same.

In the practical operation of my improved copying process I take asheetol' india-rubber of a suitable size and shape, and preferably attach it in any convenient way to a suitable elastic or iiexible backing or support, `forming thereby a pad which,when subjected to pressnre in any ordinary press, will secu re a uniform contact between the entire surface of the rnbbcr sheet and the original writing, and also the paper on which the copies are to be made. The sheet of india-rubber may be employed without the backing or support; but I prefer for convenience in use to form a pad as above described. I prefer, also,that theindi arubber surface should be of the kind known in the trade as pure sheet-rubber,"7 as I have found that sli ghtly better results are obtained by the use of this material. The thickness ofthe sheet is not material. A very thin sheet may be employed when a pad is used, although if the rubber sheet be used without the pad it is preferable to have it about an eighth of an inch thick.

I prepare the rubber surface for the transfer thereto ofthe original writing or drawing by covering it over with a thin film of dilute glycerine. This may be accomplished in either of two ways-by the application to the dry surface of glycerine diluted with from onehalf to one-quarter of its bulk of water, or by iirst sponging or otherwise slightly moistening the surface with water, and then applying the glycerine thereto in a more concentrated form. Any convenient means for applyingthc water orglycerine maybe employed,

(No mode.)

whichever mode of covering the surface with the thin ilm of dilute glycerine maybe adopted. A sponge or cloth or other suitable device will answer the purpose. The glycerine may be used even more dilute than as above mentioned, the number of copies increasing with the proportion of glycerine employed, although it is not desirable to use asolution containing more than eighty or ninety per cent.of glyeerine. In speaking of glycerine I referto the ordinary commercial article, such as may be obtained at any druggists.

In the preparation of the original writingor drawing from which it is designed to make copies I use any ordinary anilinc transfer-ink, ifa large number of copies are to be made; but if a lesser number are desired the original may be made with any of the ordinary copying-inks; but in case such an ink is used the glycerine is preferably used somewhat more dilute than otherwise.

The original having been prepared, a transfer from it is made on the rubbersheet coated with a thin film of diluted glyeerine, as above described, by placing the two in contact and subjecting them to pressure in a press of any ordinary construction. The screw-press commonly employed in oliices for copying writings answers a good purposein securing the transfer, or any form of roller-press in which the original writing and the india-rubber sheet can be subjected to pressure while in contact may be used. After the transfer is made,the original having been removed from the rubber sheet, the copies are made from theimpression left by the original by placing blank paper against the rubber sheet and subjecting them whilein contact to pressure in asuitable press. Freni six to a dozen copies can be obtained from any one impression on the rubber sheet. The original can be used three or four times in succession to produceatransferred impression on the rubber'. The rubber sheet is easily and quickly cleaned by simply rubbing the surface with a moist rag or sponge, andiu this respect my improved copying process presents an important advantage over any other method of duplicating writings heretofore in use, all of which require a prolonged washing or scrubbing, in order to remove the transferred impression, before a new transfer can be made.

IOO

The pressure requisite to secure the transfer to the rubber sheet and to produce the copies may be made by the hand alone, or by any suitable instrument; but I prefer to use a press, as before dercribed, as being the quickest and best Inode of securing the desired number of satisfactory copies.

In the accompanying` drawings, A is the sheet of rubber, and B the backing or padding of a copyingpad adapted to Working my improved process. made double to close up in book form, which is a convenient mode of arranging it.

By employing moistened or dampened paper the number of copies which may be made from any one transferred impression may be considerably increased. The best way to proceed is to use dry paper in making copies until the transferred impression is partially exhausted, and then to use moistened paper for the remainder of the copies.

My improved copying process is simpleand The pad is represented as convenient7 the materials employed in it are cheap and readily obtained, the manipulations necessaryto carry it into practice are readily learned bythe most inexperienced person, and it is capable of producing as large a number of copies as are ordinarily required.

I claim- The herein-described copying process, consisting in covering ashect of india-rubber with a thin film of diluted glycerine, making a transferred impression under'pressure of an original Writing or drawing on said sheet, and subsequently producing copies from the said transferred impression by subjecting the indiarubloer sheet in contact with blank paper to a suitable pressure, substantially as and for the purposes described.

ITALDO G. MORSE.

Witnesses:

A. R. SELDEN, H. G. PHILLIPs.

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