US747845A - Supplemental press-base for printing-plates. - Google Patents

Description

No MODEL.

No. 747,845.. PATENTED DEG. 22, 1903.

SEEEASH. SUPPLEMENTAL PRESS BASE PoR PRINTING PLATES.

APPLICATION lFILED `.llrNl-L. 2. 1903.

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v WJTNESSES:

MEM

UNITED STATES Patented December 22, 1903.

PATENT OFFICE.

SUPPLEMENTAL PREss-BAsE-FOR PRIannue-PLATES,

sPEcIFIcATIoN forming part of Letters retest No. masaaeatea December 22, 1903. Application filed June 2, 1903. Serial No. 159.788. (No model.)

To all whom it may concern:

Be it known that I, CHARLES E. BEACH, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Supplemental Press-Bases for Printing-Plates, of which the following is a specification.

This invention relates to supplementary press beds, bases, or blocks, and the object is to provide a structure of this character which will hold all sizes andkinds of printing-plates at different distances apart, so that the margins between them may be regulated as desired.

A further object is to provide simple means for adjusting the plates to overcome the inequalities in the height of the. printing-surfaces thereof, thus obviating the necessity of the usualwunderlays, As a result, plates of anysize'o' 'any number within the capacity of the press may be employed in any position desired. v

The structure that at present is considered preferable is illustrated in the accompanying drawings; but it will be understood that various changes may be made in the size, form, and details of construction without departing from the spirit of the invention.

In the drawings, Figure lis a top plan View of the improved structure, showing plates in place thereon. Fig. 2 is a view in elevation of one end of the bed. Fig. 3 is a view in elevation of the opposite end, portions thereof being broken away'and shown in section. Fig. 4 is a vertical sectional view through the bed, taken on the line 4 4 of Fig. 1. Fig. 5 is a detail perspective view of one of the clamp-blocks located Vat the margins of the bed. Fig. 6 is a view in elevation of the actuating rack-bar. Fig. 7 is a detail perspective view of one of the holding-blocks invert# ed, and Fig. 8 is a similar view of one of the margin-fastening devices. Fig. 9 is a detail perspective view of one of the holdingblocks. Fig. 10 is a View of the adjusting-screw detached.

The same reference-numerals are employed in designating similar parts throughout the several figures.

In the construction illustrated in the accompanying drawings asupplemental bed 10 is employed, having on` its under side spaced ribs 11, that are preferably located diagonally of the bed. (Indicated in Fig. 1.) Said Y bed is provided with spaced rows or series of threaded openings 12, extending vertically through the same from top to bottom and being disposed between the ribs. These openings are normally closed by adj usting-screws 13,threaded into the same and having their up- -per ends suitably slotted, said ends or heads the shan ks are adapted to screw into the openings 12, the adj usting-screws being first removed. Certain of these holding devices that are disposed along the margins of the bed (designated a) are tapered, the thicker edges being undercut. Two of the edges of the bed are reduced in thickness to provide outstanding anges 18, and to the outer edges of the lianges are secured by means of screws 19 strips 20, the upper portions of which project above said anges and are spaced from the bed, thus forming gutters. Extending into the bed from these edges are slots 2l, the lower portions of which are enlarged to provide recesses 22. Spindles 23 are located longitudinally in the recesses and have their ends journaled, as shown at 24, inthe strips and the inner end walls of the recesses. The intermediate portions of the spindles are threaded and gear-wheels 25 are attached to their outer ends, said vgear-wheels being 1ocatedin the gutters. Clamping-blocks 26 are slidably mounted on the bed over the slots 2l and are provided with depending ears 27, projecting through said slots and having threadedengagementswiththespindles. The portions of thev blocks projecting above the bed have their inner edges undercut, as shown at 28. In connection with these clamping devices an actuating rack-bar 29 is employed which is adapted to lit in thegutters and preferably has a suitable handle 30.

The plates to be clamped are shown gener- These IOO ally at 3l, said plates having beveled edges 32. These plates are laid upon the bed l0 and can be properly adj usted as to height by means of the various adjusting-screws 12, that may be located beneath them. This, it will be observed, does away with the necessity of underlays usually employed. The fastening devices are then located about the inner edges of the plates and also constitute means for spacing said plates apart, so that margins of dierent Widths can be obtained. These will be clearly evident by reference to Fig. I, wherein the same blocks are employed for obtaining two different widths of margins, the oblong shape of the blocks therefore being an important feature, as will be apparent. The fastening-blocks are held in place by screws, which are threaded into the same openings that receive the adjusting devices, and therefore said devices are interchangeable, requiring openings of a single size. Those adjustin-gscrews which are not covered by the plates are left in placein the bed, and thus prevent the openings being lled with ink, grease, and dirt. The inner and intermediate fastening devices having been properly positioned to place the plates in the desired relation the clamping blocks are brought rin to engagement with the free edges of said plates by revolving the spindles, this movement being accomplished by the actuating-rack already described. The result is that the plates are securely fastened in position and yet can be adjusted or removed with ease and despatch. Thus it will be seen that the various objects pointed out in the preliminary part of the specification are accom,- plished by meansv that are simple, can be easily and cheaply manufactured, and applied to any of the ordinary types of bedpresses.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a press-base for printing-plates, the combination of a bed having a multiplicity ot' threaded openings therein, adjusting-screws registering in said openings and filling the latter with their heads arranged to engage beneath the printing-plate, and a plate-holding device including screws interchangeable with the adjusting-screws in any of the said threaded openings.

2. In a structure of the class described, the combination with a bed having a series of openings extending into the same, from its upper face, of adj usting-screws threaded into the openings and having heads of substantially the same diameter as the openings, said screws normally filling the openings with the heads iiush with the upper face of the bed, and plate-holding devices including screws which are constructed to be threaded into the openings when the adjusting-screws are removed.

3. In a press-base for printing-plates, the combination of a bed-plate having a series of spaced ribs on its under side, and a multiplicity of threaded openings piercing the same in the intervals between the ribs, and separate plate adjusting and fastening screws interchangeable in the same openings.

4. In a press-base for printingplates, the combination of a bed-plate provided with a multiplicity of threaded openings, adjustingscrews normally filling the openings, and plate-holding devices comprising rotatable oblong blocks having engaging portions at all of their edges, and fastening-screws for said blocks interchangeable with any of the adjusting-serews.

5. In a structure of the class described, the combination with a bed-plate having a plural'ity of openings extending into the same from its upper face, adjust-ing-screws threaded into the openings and normally having their heads iiush with the upper face of the bed, said screws being movable above the bed to form supports for a plate placed thereon, and plate-fastening devices comprising oblong blocks adapted to be placed upon the bed and having undercut edges and screws passed through the blocksand of proper size to engage in the openings of the bed when the adj usting-screws are removed.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES E. BEACH.

Witnesses:

WM. C. DEANE, RoBT. H. PARKER.

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