US1203718A - Printing-form section. - Google Patents

Description

J-. s. DUNCAN. PRINTING FORM SECTION. MPLICATION FILED D EC.3I, I915.

Patented Nov. 7, 1916 UNITED snares P JOSEPH S. DUNCAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ADDRESSOGRAPH COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PRINTINGPFORM SECTION.

Specification of Letters Patent.

Patented Nov. "5, 1916.

Application filedDecember 31, 1915. Serial No. 69,571. v

To all whom it may concern:

Be it known that I, JOSEPH S. DUNCAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printing-Form Sections, of which the following is a specification.

This invention relates to printing form sections adapted. for employment as the units of a sectional printing form, such as disclosed in my Patent No. 1,054,284, dated February 25, 1913, and presents certain i mportant improvements upon the prlnt ng form section disclosed in my Patent No. 1,054,285 of the same date.

The type are stamped upon the metal plate and this involves a stretching of the metal which is considerable under all condi-- tions but especially so when lower and up per case characters are produced with letter and line spacing to imitate typewritten work. To obtain the best results it is essential to provide a plate of sufficient strength and stiffness to hold its general shape'and stand the necessary handling to which it is subjected in the character stamping operation and in subsequent prlnting operations, and this plate must also be of such a nature that the characters can be rapidly stamped up thereon with a clear and distinct printing face, preferably in letter and line spacing corresponding to that of the ordinary typewriter, without unnecessarily or injuriously stretching the metal, so as to provide a strong and substantial printing device which can be used repeatedly and which will always produce a clear and d s tinct impression in imitation of typewrit- In practice it has been found that while the form section illustrated in my Patent No. 1,054,285 may be used with entirely satisfactory results in many cases there are times when it is somewhat difficult to produce a line of printing characters with their faces in the proper printing plane because of the tendency of the metal to fail to stretch properly to a final set during the stamping operation. This is due to the presence of the retaining flange 6 which extends at a right angleto the body of the section from end to end along the edge thereof as shown in Patent No. 1,054,285. To accommodate this flange while the adjacent line of type characters is being stamped it has been necessary to cut away the shoulder adjacent the face of the punch which is used for producing a character so that a line of characters may be stamped up close to the flange, whereby when a plurality of form sections are assembled, as shown in my Patent No. 1,054,284, there will be the same line spacing between the sections as there is between the lines of each section.

In Figure 81 have shown how the punch disclosed in my Patent No. 1,048,461, dated December 24, 1912, has been cut away to accommodate the flange 6 shown in my Patent No. 1,054,285, and in Fig. 9 I have shown the punch as it appears in said patent and was intended for use and is now used with the present invention.

As a result of cutting away the shoulder 'of the punches to accommodate the flanges while stamping the adjacent line of type characters there is not sufficient support for the plate at the upper portion of any line of type being stamped and not sufficient clamping action of the punch and dieupon the section at this portion, and: hence the metal does not stretch and set properly, but on the contrary there is a'tendency to contract at the upper edge of the line of type. That is to say, the punch and die do not fill out properly the lower portion of the type due, as I believe, to the lack of support and nnperfect clamping action heretofore referred to and this causes the type characters to tilt, so tospeak, to a more or less extent and otherwise fail to present a printing surface which will produce a clear and distinct impression. For these reasons the lower portions of each line of type will often print heavy while the'upper portions and holding the section thereon in the same manner as does the continuous flange, and which will not interfere with the character stamping devices or necessitate cutting away the shoulder of the punches.

A further object of my invention is to provide sufficient metal at the upper edge of the section to enable said edge to be firmly gripped by the clamping portions of the cooperating punch and die during the stamping operation so that proper stretching of he metal to form the desired character is assured, thus avoiding possibility of a partial contraction of the metal and consequent deformation of the character after the punching operation due to its elasticity and failure to stretch to a final set.

In the accompanying drawings illustrating a preferred embodiment of the invention Fig. 1 is a perspective view of a form section embodying my invention and before the type characters have been stamped thereon; Fig. 2 is a perspective view of a completed form section with type characters thereon and the flangesremoved, sufficient type characters being shown to illustrate the purpose of the invention; Figs. 3 and 4 are end views of Figs. 1 and 2, respectively; Fig. 5 is a sectional view of a form bed having a plurality of the form sections arranged thereon in proper juxtaposition and in printing position; Fig. 6 illustrates the manner in which the form section is held by the jaws of the graphotype or other similar machine during the stamping operation; Fig. 7 shows one means whereby the flanges may be broken off Fig. 8 is a detail sectional View showing how the punch has been cut away in practice to accommodate the down-turned retaining flange of the section; Fig. 9 is a detail sectional view similar to Fig. 8 and showing that with my present invention the punch need not be cut away as illustrated in Fig. 8.

The blank printing form section 10 is made of sheet metal of such composition as will permit the type characters 11 to be stamped up thereon in letter and line spacing to correspond with that of ordinary type writing. Instead of providing the section with a down-turned flange 6 (Fig. 8), (extending throughout the length of the section, as disclosed in my Patent No. 1,054,285) I provide clown-turned retaining lugs 12 on one edge of the section, one adjacent each end of the section and located opposite the end margins of the section 10 beyond that portion 10 which. receives the printing characters. I also provide the section with an outwardly projecting flange 13 located between the lugs 12 and of suflicient width to enable that edge of the section to be firmly gripped by the clamping portions of the cooperating punch 14 and die 15 (Fig. 9) during the stamping operation so that proper stretching of the metal to form the desired character is assured. This flange 13 supplies a sufficiency of metal in proper place and position to enable the punch and die to produce characters with proper printing faces closely adjacent to the edge to which the flange 13 is integrally connected and voids the tendency of the metal at this edge of the section to contract after stretching, or not to fully stretch, as some times happens when the flange is turned down and the punch is cut out at 16, as shown in Fig. 8. In other words, it has been discovered that to obtain the proper stretching and even set of the type in each line and in all the lines it is desirable, in commercial work, to clamp the section at the top of the line as well as at the bottom of the line which can not be accomplished with the down-turned flange and cut-out punch, as shown in Fig. 8, but can be accomplished'with the outstanding flange and shoulder punch, shownin Fig. 9. The section is also provided on its opposite edge with a flange 17 to be engaged by the jaws 18 of the graphotype or other machine in which the type characters are stamped on the section, as shown in Fig. 6, and after the type characters have been stamped on the sectionboth of the flanges 13 and 17 are {broken off by any suitable means, such as the grooved member 19 (Fig. 7). To facilitate the removal of the flanges 13 and 17 the section may be weakened by score lines 20 and intermediate score lines defining the line spacing may be provided. on the section to facilitate bending the section transversely when it is to be applied on a circular bed.

It will be readily observed that the lugs 12 are suflicient for retaining the section in place on the bed 20, as disclosed in my Patent No. 1,054,284, and that they are not located opposite that portion of the plate upon which the printing characters are stamped and hence are never positioned opposite a punch and die during the operation of stamping printing characters on the plate and, therefore, do not' require that the punch be cutaway as has been formerly done to enable type characters to be stamped up close to the flange edge of the section. Nhile these retaining lugs are suflicient for the purpose they also enable the intermediate flange 13 to be provided in the plane of the section to insure a proper stretching and set of the metal during the stamping operation and the formation of type characters of uniformly clear and distinct printing faces in a single plane throughout the printing section, as hereinbefore pointed out. These results are much to be desired in this class of work because the intention is to imitate typewritten letters and it will be readily understood that the perfection of imitation is more important in letters than in a mere address.

I claim:

1. A printing form section having a down-turned lug on one edge adjacent each end thereof and type characters struck up from the body of the section closely adjacent the edge thereof between said lugs.

2. A blank printing form section having down-turned lugs on one edge adjacent the ends thereof and a flange extending out wardly from said edge between saidlugs.

3. A blank printing form section having a flange extending outwardly from one edge thereof and of less length than said edge.

4. A blank printing form section having a flange projecting outwardly from one edge thereof, the ends of said flange being spaced from the ends of the section.

5. A blank printing form section having a character portion and flanges'at opposite edges of the section abutting the character portion, the section being weakened between each flange .and the character portion to permit the flanges being readily broken off and one of said flanges being of less length than the section.

6. A blank printing form section having a character portion, a flange projecting outwardly from one edge of the section, downturned lugs on the other edge of the section adjacent the ends thereof, and an outwardly projecting flange on the latter edge of the section between the lugs.

JOSEPH S. DUNCAN.

\Vitnesses:

WM. 0. BELT, \V. T. VVESTERBERG.

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

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