US1282923A - Printing-plate and support therefor. - Google Patents

Description

E. E. NOVOTNY. PRINTING PLATE AND SUPPORT THEREFOR.

AWucATmN FILED MAY 20 I916 Patented Oct. 29, 1918. 7 l

nearer EMIL E. NDVOTNY, E RIVERSIDE, ILLINQIIE, flESIGrNOI-tit) 3'. ETUGIDIEILI'J STUKES, Ell

'MUOTLES'E O NlE',

PRINTIJIIG-IInh'llE SITI I-MIRT THELREFDIR.

hpecification of Letters Patent.

Patented @et. as, rare.

Application filed May 20, 1916. serial No. 98,913.

useful Improvements in Printing-Plates and Supports Therefor, of which the following is a specification.

The present invention relates to certam novel and useful improvements inprinting plates and means for supporting the same in operative position on the printing press; My

invention is applicable to and adapted for fiat plates such as are used in connection with bed and platen printingpresses, or for curved plates such as are employed in rotary presses, and While I have in the presentinstance-shown and described my invention as embodying, among other features, a printing plate made from a composition such as a phenolic condensation product, I wish it to be understood that it is not limited in its useful application to a plate or plates of .this character. I

In carryingout my invention I propose to provide a saddle or printing plate support which may be quickly and accuratelyfitted to the press, said saddle being constructed or equipped with means adapted to cooperate with complementary means on the printlng plate so that the latter maybe readily, firmly and conveniently secured or fastened in exactly the proper position for printing purposes. 1

With the above recited objects and others of a similar nature in View, my invention consists in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims.

In the accompanying drawings: Figure 1 is a transverse, vertical, sectional view taken through'a segment or portion of the cylinder of a printing press equipped with my saddle and plate.

Fig. 2 is a detail cross-sectional view of the saddle shown in Fig. 1. V

, Fig. 3 is a similar view of the plate.

Fig. 4 is a bottom plan view of a portion of the printing plate.

Fig. -5 is atop plan view of aportion of the saddle Fig. 6 is a crosssectional view taken through a modified form of the invention which embodies a flat plate and-saddle.

Before entering into a detailed description of my invention I will state briefly that in E. Novo'rivr, a

its preferred form it embraces, among other features, a saddle or support for the printing plate which is preferably formed of metal, such as aluminum, for example, this saddle preferably having. formed in its upper or top face a series of small depressions or sockets spaced predetermined distances apart, these depressions or sockets being adapted to receive small complementary bosses or projections formed on the under side of the printing plate, these bosses of the printing plate being, of course, spaced apart to correspond to the'spacing of the sockets of the saddle. The saddle is provided also with countersunk screw bores opening into the sockets, while the bosses of the printing plateare likewise provided With screw bores adapted to aline with thebores of the sockets so that the plate may be screwed to the saddle. 'This is simply the preferred form of the invention as, of course, it will be un- V derstood that if desired the plate might be formed with the sockets andthe saddle with thebosses, and in'some instances the bosses and sockets might be omitted altogether and other clamping or fastening devices employed for connecting the plate to the saddle. Furthermore, I have herein, by way of illustration, shown the application of a' single plate to a single saddle, but it will, of course, 'be understood that a plurality of plates, or a. number of sections may be secured to the saddle, and if necessary, the saddle may be .made in sections.

Referring now to the'accompanying drawings in detail, the letter A indicates the saddle as an entirety in the form shown in Figs. 1 to 5, inclusive. This saddle is in the nature of a plate curved or bent to corre spond to the curve of the printing press cylinder B, to which it is secured by screws 1 which pass through countersunk bores or screw-holes 2, suitably located, preferably adjacent the end edges of the saddle. Th s saddle is preferably made from a metal such as aluminum and is cast with a series of small sockets or depressions 3 in its upper face, these sockets being preferably arranged in rows and spaced equidistant apart. Opening through and into ,each socket is a screw-bore 4;, which also opens through the bottom or back of the saddle, the end of the bore opening into the socket being reduced and tapered as at 6. to snugly receive the head of the, preferably, hollow screw '3', the

tion product, that is to say, a product hav-' ing; as constituents phenol and formaldehyde. There are a number of these phenol products known in the art, one of which is known as bakelite? A printing plate made from uch a composition or product pos' sesses manifest advantages from the stand point of durability, rigidity, uniformity under variations in temperature, capability of withstanding the stresses and strains en countered in the printing operation and will present sharp, clear type outlines, thus in-v suring clean, attractive work.

This printin plate C is cast in a suitable mold, so constructed as to form series or rows of small bosses or projections 8 on the back of the plate, these bosses or projections being complementary as to the sockets of the saddle, are spaced the same -or equal and uniform distances apart, as are the sockets of the saddle, and are of dimensions to fit snugly within the socket. In the casting; of the plate each boss is formed with a threaded bore 9 adapted to aline with the bore in the .socket in which the boss seats, this bore 9 being adapted to receive the shank of the screw 7 so that the plate may be secured to the saddle. It is, of course,

to be understood that the plate is curved or bent to correspond to the eurvatureoit' the saddle. Thus, in applying the plate to the saddle, it is only necessary to line up the bosses of the plate in the sockets of the saddle and thread in the screws.

The majority of the bosses, as well as the majority of the sockets of the saddle, are substantially circular in cross-dimension, horizontally, but I preferably form the socket of the rows adjacent the side edges oi. the saddle elongated as shown at 10, and l likewise elongatethe bosses of the rows adjacent the side edges of the plate, as shown at 11,, to correspond with the elongated sockets in which they are to fit, screws also being employed for securing the elongated menses bosses in the elongated sockets. This elongation of the bosses and sockets at the side edges of the plate and saddle, respectively,

enable me more readily to apply and remove a maximum size plate from its saddle.

In Fig. 6 I have shown a cross-section of a slightly modified form of the invention, in this case a flat saddle plate B, and upon which is to be fitted a flat printinn plate C. This flat saddle plate B i also-provided with a series, or rows, of sockets or depressions 12 for the reception of complementary bosses 13 formed on the under side of the flat plate, the screws 14: being employed as a fastening means.

It will be noted that l provide a means for quickly applying a plate to the press without employing hooks or the like, which tend to weaken the structure, and my invention will hold the plates snugly down on the cylinder without producing bulges or the like.

' While l have herein shown and described.

the preferred embodiment of my invention,

I wish it to be understoodthat I do not confine myself to all the precise details of construction herein set-forth by way of illustration, as modification and variation may be made Without departing from the spirit of the invention or exceeding. the scope-0t the appended claims,

-.W'hat I claim is:

1. The combination with a support, of a printing plate adapted to be attached thereformed in its outer face and a series of screw bores opening; into said sockets, a printing plate having a series of. similarly spaced bosses formed on its backrface and adapted to fit into the sockets of the saddle, the said bosses having screw bores adapted to aline with the bores of the saddle, and screw membe'rs seated in the bores and fastening the plate to the saddle.

In testimony whereof I afix my signature. Ell 1E. NUVUTNY.

Images