US231672A

US231672A - James evan jeffebies

Info

Publication number: US231672A
Authority: US
Publication date: 1880-08-31
Anticipated expiration: 1897-08-31

Description

NITED STATES PATENT JAMES E. J EFFERIES, OF YEO BANK, OONGRESBURY, ENGLAND.

DUPLICATE PAPER FOR PRODUCING COPIES.

SPECIFICATION forming part of Letters Il-Iatent No. 231,672, dated August 31, 1880.

Application filed April 3, 1880. (No model.) Patented in England August 22, 1879.

To all whom, it may concern:

Be it known that I, JAMES EVAN JEFFE- RIES, a subject of the Queen of Great Britain, residing at Yeo Bank, Oongresbury, in the county of Somerset, England, have invented certain new and useful Improvements in Duplicate Paper for Producing Copies, for which I have received Letters Patent in England, No. 3,391, dated 22d day of August, 1879; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

In order that writing or drawing or printing may simultaneously be produced on two or more sheets of paper, I use paper which is to some extent pervious to the ink which is to be used for producing the writing or drawing, and I cause the blank sheets of paper which are to be simultaneously written or drawn upon to adhere together face to face without at the same time rendering them impervious to the ink. Paper so made up of two or more sufficiently thin blank sheets I call duplicate or multiplex writing or drawing or printing paper. i

The sheets of paper I cause to adhere to one another sufficiently to prevent them from separating too readily from one another, but yet to allow of their being separated one from the other after they have been written, drawn, or printed on.- The best inks to use for writ ing or drawing on such prepared paper are inks containing some of the aniline dyes, or else inks containing weak acid or caustic alkalies, which will readily penetrate the paper and act onany coloring or other matter which the lower sheet or sheets of paper may contain. The sheets of paper should be comparatively thin, and when it is required that the paper should be stiff, like ordinary letter-paper, itis better to use starch as the thickening and stiffin g matter than to use ordinary size.

Various ways may be adopted for causing two or more sheets of paper to adhere together to the extent above mentioned. In many cases it is sufficient to press the sheets together when slightly moist, and at the same time slightly emboss both sheets by one or other of the pressing-surfaces being toothed or roughened. If the pressing together of the sheets interpose calico or linen between the paper and one, or it might be both, of the hard-pressing rollers used to press the papers together;

or the sheets of paper may be passed between metal or other rollers the surface of one of which has engraved or formed upon it a pattern in imitation of linen or such like woven fabric, while the surface of the other roller is preferably surrounded by vulcanized indiarubber or other elastic material; or, in place of moistening the sheets of paper with water before pressing them, the adjacent surfaces might be coated with a very thin solution of starch or other suitable adhesive material, or the paper might be moistened with very dilute hydrochloric acid. In many cases it would be sufficient to prepare the surface of the upper sheet of paper with a smooth or polished surface for writing on, while its under surface would be left un glazed, so that it may readily adhere to the sheet of paper below it when pressure is applied. This pressure may be given at the time of making up the paper into books or pads, or subsequently. Paper thus composed of two or more sheets, separable one from the other, may be used for a great variety of purposes. For example, the sheets may be bound up into books, and the books used as letter-books, or order-books, or bankers check-books, or books of post-office orders, or such like, may be made up from such paper. For these purposes it would ordinarily be sufficient for the paper to be made up from two sheets only. Thus when a letter or order was written on the upper surface of any one of the duplicate leaves of the book the ink used (or acid or other penetrating'fiuid contained in the ink) would penetrate through the sheets of which such leaf was composed, and when the letter or order had been written the sheets composing the leaf might be separated from one another, and one torn off and sent away while the other was retained in the book. In the same way a record would be kept of the filling in of all checks or postoffice orders, or such like, when such checks or post-office orders were printed on duplicate paper formed as above described.

The Writing on one leaf of the book would copies simultaneously in the manner specified, [o in most cases not penetrate through from this the same consisting of the temporarily-adherleaf to the next leaf below it. The thin film ing thin blank sheets, substantially as hereinof air between the leaves would be sufficient before set forth.

5 to prevent this. JAMES EVAN JEFFERIES.

Having thus described my invention, I Witnesses: would state that I claim NICHOLAS G. HEAVEN, The hereinbeforedescribed prepared (lupli- SAMUEL 'WM. REED,

cate paper by which to produce two or more Clerks to Mr. A; H. Wcmsey, Solicitor, Bristol.-