US1100089A - Method of manufacturing type-wheels for printing-machines. - Google Patents

Description

E. OGUMPA UGH. METHOD OF MANUFACTURING TYPE WHEELS FOR PRINT ING MACHINES. APPLICATION FILED SBPT.12, 191s.'

Patented June 16,1914. 7

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UNITED STATES PATENT OFFICE.

EDMUND OCUMPAUGH, OF ROCHESTER, NEW' YORK, ASSIGNOR TO DEFIANCE MACHINE COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEXV YORK.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed September 12, 1913. Serial No. 789,443.

T0 at whom it may concern:

Be it known that I, EDMUND OCUMPAUGH, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Matters in the Method of Manufacturing Type-Wheels for Printing- Machines, of which the following is a specification.

My invention relates to the method of manufacturing type wheels for printing machines, and more particularly to the method of making and bending metal type plates to be secured to the outer faces of wheels used in check writing and check protecting machines.

The type metal plates used in machines of this class are ordinarily of the electro-type construction, and are, therefore, made in a flat sheet, with the characters raised therefrom.

The surface of one side of these sheets whereas the rest of the sheet is of softer metal, it has been found in practice very difficult to bend the sheets into cylindrical form without throwing the lines of printing matter out of proper alinement one with the other, due to the fact that some of the lines of types are longer than others, and, therefore, add to the thickness of the metal at one side of the sheet. In order to overcome this difficulty, and to make it possible to readily bend the metal into a cylinder, and at the same time to maintain the alinement and spacing of the lines of printing matter on the plates, I fill in the short lines of printing matter with meaningless characters, stars, and I also provide the edge of the plate with embossures either in the form of continuous bands of raised metal or else in the form of series of raised portions. By this means not only does the entire surface of the metal tend to bend with equal stretching of the outer and crushing of the inner surface, but this bending is so dominated by the embossures at the edges of the plate that whatever slight tendency toward warping occurs, due to the irregular distribution of printing characters, is overcome.

The process of carrying out my invention such as large dots oris illustrated in the accompanying drawings, in which Figure 1 shows a portion of a type plate havlng embossures in the form of series of raised portions at each edge; Fig. 2 shows a portion of a type plate having embossures in the form of raised bands at its edges; Fig. 3 shows the type plate of Fig. 2 bent into a cylinder and secured to the surface of a typewheel; and Fig. a shows the type wheel in its final form, after the embossures have been cut away.

The type plate illustrated in Fig. 1 has a plurality of printing characters thereon, some of which form lines extending almost across the plate, while others form short lines extending less than half way across the plate. The latter, or short lines, are filled out by means of round dots (1), so that the thickness of the plate will be substantially the same on both sides. At the extreme edges of this plate the rectangular embossures (2) are arranged in alinement with the lines of type, the purpose of this being to cause the greater part of the bending of the plate to occur between the lines of type, so

that the actual surface of the type will be substantially flat. In Fig. 2 this latter advantage is sacrificed by making the embossures (3) at the sides of this plate in the form of continuous bands.

In carrying out my invention, the type plate of Fig. 1 or Fig. 2, which has been prepared by the usual electro-type method, is passed between rollers properly set to bend the plate into a cylinder of substantially the size of the wheel upon which the plate is to be secured. The plate with its auxiliary embossures is then placed upon the type wheel 1), and secured thereto by means of a plurality of rivets (5), which may be spaced about the circumference of the wheel in any desired manner. The wheel is then placed in a lathe, or special turning machine, and the embossures (2) or (3), as the case may be, are then cut away, producing the type wheel of Fig. 4, on which only the characters remain which actually come in contact with the paper during the printing process.

While I have described the method of carrying out my invention with particular reference to the accompanying drawings, I do not Wish to be unduly limited thereto, many deviations from the particular structure being possible Without in any Way departing from the spirit or scope of my invention.

What I claim and wish to secure by Letters Patent is 1. The method of forming cylindrical type Wheels having long and short lines of type consisting in producing substantially equal thickness for all parts of the metal by the introduction of meaningless characters to fill out short lines, bending the plate into a cylinder and securing it to the surface of the type Wheel.

2. The method of manufacturing cylindrical type Wheels, Which consists in forming fiat electro-types with thickened edges extending beyond the printing faces thereof, bending the electro-types and their thickened edges into a cylinder, and thereafter removing the raised edges.

3. The method of forming cylindrical type Wheels, which consists in distributing characters substantially equally throughout the flat surface of an electro-type, providing dominating embossures along each edge of the plate, bending the plate into a cylinder, and thereafter removing the embossed edges.

4. The method of forming curved printing plates which consists in distributing characters substantially equally throughout the flat surface of an electro-type, providing dominating embossures along the edge of the printing plate, bending the plate and its embossed edges into a curve and thereafter removing the embossed edges.

Signed by me at Rochester, county of Monroe, and State of New York, in the presence of two Witnesses.

EDMUN D OOUMPAUGH.

Witnesses:

E. C. GEoK, HENRY J. PLANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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