US956522A - Method of bending electrotype-plates. - Google Patents

Description

P. M. FURLONG.

METHOD OF BENDING ELECTROTYPE PLATES. APPLICATION FILED JAN; 14, 1009. RENEWED FEB. 4, 1910.

956,522. Patented May 3,1910.

Arm mu To all whom it may concern:

' plate, so that when curved than when flat; and in from flat plates of the same work. same difficulty UNI;

PATRICK M.

STAES fr rrion.

FURLONG, OF NEW YORK, N. Y.

METHOD OF BENDING ELECTROTYPE-PLATES.

Be it known that I, PATRICK M. F URLONG, of the city of New York, county of Kings, and State of New Xork, have invented a new and Improved trotype Plates; and I do' hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to use the same, reference being had to the accompanying drawings, forming part of this application.

An obstacle to the successful and econom-- ical use of two-color printing-presses in printing from both tlat and curved electrotype or other printing plates on the same job, has been the necessity for bending the electrotype plates twice, melting away the backing between each bend, and re-backing with metal. This is made necessary by the fact that when an electrotype or other printing plateis curved for printingon a press cylinder, the process of curving stretches the it is longer on the printing face consesuch curved register with the impression The obtains when separate parts of a work are printed on cylinders of dif ferent diameters.

In this present application I describe an improved method of bending or curving electrotypes and other printing plates, which prevents the stretching of the plates while being bent or curved, thus producing bent or curved plates having the length of the print ing face the same as that of flat plates of the same job or worlr, and giving an impression in register with the impression from the flat qu'ence the impression from plate does not.

plates.

Figure'l IS a perspective view of the plateholder. F 1g. 2 1s a perspective View or a reniovable wedge-shaped member. Fig. 3 is a perspective view of the plateholder with the fiat electrotye plate secured thereon. Fig. 4: is an end evation of a form of press for giving the curvature to the plate. Fig. 5 is a perspective view of the completed plate after being operated upon by the dies of the press.

In the accompanying drzm'ings: Fig. 1 represents a spective view of .a plateholder, (4, con .ing 01' n lat plateof resilient material, preferably steel, having guides or *3, and c, isposed upon its @rface a1 distance apart to conveniently Method of Bending Elec I i i I I l I i i i i I Patented May 3, 1910. Renewed February 4, 1910. Serial No. 542.072.

receive an electrotype plate between them with some space atone end. Guide or cleat 0 is wider at one end than theother, and is wedge-shaped.

Fig.- 2 is a perspective view of a wedge; shaped member or elongated piece of. ma-

terial, flat, and having one end wider than the other.

l ig. 3 is a perspective .view of the plateholder at with a flat electrotype plate 7'', laid I flat upon the surface of the'plate-holder a between the cleats or guides & and c, and with a piece of card-board or paper e between the fiat surfaces of the plate and plate-holder. The wedge-shaped member (Z is shown in position between one end of elcctrotype plate 7', and the fixed guide or cleat c. i

Fig. i is an end view of an ordinary press having a convex die y arranged to fit firmly into a concave die it. 'lhe plate-holderid with the electrotype plate 7 lying flat-upon the card board 0 is shown between the :dies 9 and It, in position for pressing.

Fig. 5 is a perspective view of the plate f in itscurved condition after receiving the impress of the dies in the press. The plateholder a and card board e are shown returned to their; original flat condition through their resiliency. T

In performing the method,.the flat elco-g trotype plate, as showpnt f, in Fig; 3, is plgiccd with thev printing-surface down on the tint surface of the improved plate-holder a, with a card-board, 0, between the surfaces,

to prevent abrasion of the typefaces. The elcctrotype plate is placed on the plateholder between the cleats or guides b and c, and the separate wedge-shaped member (I inserted between the cleat or guide 0 and the cud of the ch-actrotype plate, and driven home. so that its sides tightly engage with the cleat or guide 1: and with the electrotypc plate f, thus forcing the plate firmly against the'cleut b on one side, and the wedge (Z on the other.

The piatcholder withthe cardboard and tho eleetrotvpc plate held tightly between the guides by the impact of the wedge, is placed between the convex and concave dies of a press, as shown in Fig. 4. and the dies brought together by turning down the press in' the usual manner. The dies of the press are then separated, by reversing the press; the plateholder removed with its contents of plate and cardboard, and the wedge removed from between the end of the electrotype plate and the guide or cleat. The plateholder and cardboard return to'their original fiat condition, wholly or nearl so, by reason of their resiliency. The resu t of this operation is to produce an electrotype-plate bent to the segment of a cylinder as shown in f, Fig. 5, and which has its printing sur face of the same length as it was when the electrotype plate was fiat, before being pressed. This result is due to the softer metal of the electrotype plate being held by the guides or cleats upon the plateholder, which is stronger than the electroty e plate, and prevents it from stretching in t e processor pressing.

In speakin of the printing surfaces of a flat plate anc a curved plate produced by my process being the same in length, I desire to include this sameness of length in curved plates of diiierin de rees of curvature, when my improve met 0d is used.

The use of a late-holder of resilient material on the side of an electrotype plate, with a bufi'er of cardboard or paper between the plate and the plate-holder, during the process of bending, Is now in common use in the art as here shown; as is also the use of a press with convex and concave dies, or a concave die and rollers, to bend or curve the plate, and I do not claim any of these steps as new.

' What I claim as new is:

1. The herein described method of bending or curving electrotype plates, which consists in confining the edges of the plate parallel to the axis of the bend or curve and downward, interposin then bending or curving said plate while held a ainst stretchin 2. The ing or curving an electroty e platewhich consists in placing the fiat e ectrotype plate upon a support with the an aim-abrasion member, tightly confining the sides of the electrotype plate parallel to the axis of the bend and then bending the plate.

3. The herein described method of bending or curvin electrotype plates which consists in tight y wedging the opposite sides thereof against a support and confining said sides parallel to the axis of the curve, then subjecting the'same to the action of curved dies, then removing the holding means and allowing the support by its resiliency to assume its origina fiat condition.

4. The herein described method of bending an electrotype plate which consists in placing upon a support a resilient bed, placing on said bed an electrotype plate with the printing surface downward, then firmly holding the opposite sides parallel to the axis of the curve and against expansion, then pressing between curved dies and then removing the holding means and allowin the support and bed to assume its origins.

fiat condition by reason of their resiliency.

Dated New York, January 5, 1909.

PATRICK M. EURL'ONG.

Witnesses:

VVrL-H. DAIGNEAULT, JULIUS SILVERMAN.

printing surface herein descrided method of bend-

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