Another kind of stencil is the waxed paper which is used in mimeograph work and the dermatype stencil, a chemically coated fibrous sheet of great toughness which is converted into a stencil by the impression of type or stylus. With this form of stencil, the fibrous sheet is prepared ready for use of a size about the dimensions of the typewriter paper. It is in serted in the typewriter and a liquid is applied to it with a brush, when it is ready for the type matter. With the ribbon of the typewriter re moved or held away from contact with the keys by an attachment usually fitted to typewriters, the pressure of the keys separates the chemical coating on the fibrous sheet. After all the wording required is typed on the sheet, the lat ter is removed and spread over an inked cylin der of a hand or motor-driven press. Paper of about the usual typewriter size is run be tween this cylinder and a platen roller, in which operation a small amount of ink is squeezed through all of the places in the fibrous sheet where the typewriter keys have made an im pression, which brings out all the letters on the sheet of paper in a very satisfactory manner. For mechanically addressing, a portion of this fibrous sheet enclosed in a frame of paper is placed into a special attachment that can be fitted to a typewriter and the wording can then by typed through the coating on the fibre as explained above. Stencils for addressing pur
poses are also made by cutting out small letters from stiff paper, by embossing metal plates, or perforating thin metal plates or paper. These perforated, cut or embossed stencils for addressing are made by special machines which stamp dies bearing letters or numerals with cutting edges, or punching surfaces as the case may be, against the stiff paper or thin metal. From these small stencils, the address is im printed upon the desired place on a paper by means of other machines, either hand or power driven. The usual machine for this purpose holds a tray of these stencils and automatically carries each one over an inked pad where the ink is forced through the letters and printed upon the paper by the pressure of an arm that bears upon the stencil from above. This arm of the machine moves up when the pressure is released, and, if adjusted for the purpose, dis poses of the used stencil by pushing it to one side; at the same time it moves forward the next stencil into its proper position on the pad. The addressing from embossed sten cil addresses is performed by bringing down a plunger in which there is a rubber section that strikes the paper against an inked ribbon which covers the raised letters of the stencil.