US277946A - Copying press - Google Patents

Description

(No Modelfy J. s, SAMMONS.

l -GOPYING PRESS. No. 277,946-M. PatentedMy 22,1883.

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' UNITED STATES PATENT OFFICE.

JACOB S. SAMMONS, OF NEW YORK, N. Y., ASSIGNOR TO THE UNITED l, STATES PNEUMATIC COPYING PRESS COMPANY, OF SAME` PLACE.

COPYING-PRESS.

SPECIFICATION forming part of Letters Patent No. 277,946, dated May 22, 1883.

' Appnmmon mea mi@ 15,1882. (No model.) l

To alt lwhom it may concern Be it known that I, JACOB S. SAMMONS, a citizen of the United States, residingin thecity of New York, county ot New York, and State ot' New York, have invented certain new and useful Improvements in Copying-Presses, full y described and represented in the following specification and the accompanying drawings,

4forming a part of the same.

pressure to produce thecopying operation in a book confined between such platen and a bed.

Theinvention consistsin an improved structure of bellows and its mountings; in a metal strengthening plate a nd rib applied, respectively, tothe wooden top and bottom plates, whereby their structure is made stiff and strong enough to resist warping or straining, and thus provide for aperfect operation of the pressingplaten; and in a peculiar construction of valve, aswell as various combinations of parts, all particularly hereinafter described and claimed.

In its general structure the press shown herein as embracing these improvements does not differ from that shown in said patent. Thus it consists of a bed-plate, A, and a top plate, B, connected together, preferably at the ends, by supporting-plates,through which said bed and top plates are rigidly held a suitable distance apart to accommodate a platen, C, and its air-bag D, and to permit the introduction and removal ot' a copying-book between said platen and the bed-plate, which supportingend pla-tes,while they may be a single one at each end and permanently attached in most cases, are by preference made into two memtween the bed-plate and platen, as circumstances niay require. The platen C is pro-v vided with springs 5 to raise it, and is depressed by means ot' an air-bag, D, that has an induction-port, 1I, communicating with a pump, E, and with an eduction-port, I, that communicates with the atmosphere.

In the present structure many improvements in the details are el'ected, by which the perfect operation ot the structure is obtained.

To prevent the base or bed plate A from beging twisted or distorted out ot' level by reason of the strain to which it is subjected, it is constructed in two pieces, 1112, itted to a longitudinal strengthening-rib, 13, which pieces l1 12 and rib 13 at their ends are embraced and securely held by the flanges 8 9 ot' the plate 4. The base or bed plate A, thus constructed, is not liable to warp laterally, and is given great longitudinal stit`ness,its level condition heilig thus maintained. y

The improvements effected in the pump or air-forcing apparatus will best be understood by a`description ot' its whole structure and mounting.

Instead otl mounting its bellows` in a wooden seat, as in said patent, I provide for Yits support a metal plate, F, ot' such dimensions as to receivethe base ofthe bellows and provide for the induction `and eduction ports H I and their valves. This plate F is, moreover, extended longitudinally to nearly the extent of the top plate, B, whereby it further vpertorms the function of imparting longitudinal and lateral stiffness to said top plate, thus preventing undue straining or warping that member,which is preferabl ymainl y constructed ot'- wood. This plate is secured upon the under side ofthe top plate, Bby screws or other simple fastenings, and thus covers recesses cut through the said platen to secure the bellows and the eduction-valve. The bellows 20 is constructed in cup form, thus slightly tapering up ward. Its lower ed ge is turned outward and its upper edge inward to form anges whereby it may be secured. The lower flange is held snugly in place upon the plate F by means of a retainingring, 14, the lower edge of which has one or more projections. or continuous ridges, that-nip-the fabric of which the bellows is composed and indent it as the ring is forced downward by its attaching-screws,

that enter and thus clamp it to said plate F.

By the elastic nature of the fabric of the bellows or by an elastic packing, ringmay be depended upon to form an air-tight jointattaching the bottom of the bellows to the plate F. The upper an'ge of' the bellows is secured to a head-plate, 16, by a flanged annulus, 17, between which said flange is tightly embraced, as said plate and annnlus are secured together by screws or similar fastenings. This headplate is provided with a central bearing for the handle or operating-lever L, and at proper points with feeding-valves 1S, through which the air is admitted to the bellows. Y

As it is requisite that the bellows should lap or fold together with regularity and precision when compressed, each folding-point is provided with a wire hoop or band, 6, the function of which is notl only to impart circumferential strength, and thus prevent lateral dislortion and unusual wear, but to compel each fold to move with vertical regularity as the bellows is operated by the lever L. To cause the ascent ot'the hello ws it is provided interiorly With a circnlarsprng that encircles a hub, 19, at the bottom and embraces the annnlus 17 at the top. Then the bellows is collapsed the bends of this spring are laid snugly around said hub and the folds ofthe bellows are super-A posed in a regular pile.

The air-bag D is a longfiat sack-like structure supported between the platen G and the top plate, B. Itis connected with the bellows by its induction-port H, and to the top plate, B, by its ednction-port I, both ot' which are valves of' the same though peculiar construction, especially adapting them to an apparatus of this nature where the slightest escape of air should be prevented. (SeeFig.3.) They each consist of a housing formed by a body, 30, flanged to fit a recessed seat in the plate F, into which body a bottom member, 3l, and a top member, 32, are secured by fasteningserewthreads. The flange of the body 30 and a similar one upon the member 3l are provided to embrace the material ot' the sack, and thus form an air-tight ljoint. The member 31 is provided with air-passages a, and with a central slot, forming a guide for the stem t of the valve c, and the-member 32 is provided not only with an air-passage, o, but with a seat, s, for the valve e, which seatis formed by a projecting neck having a sharp edge. The valve e has a cup-shaped head, in which is held arubber or other soft cushion that willbe indented by contact under pressure with the sharpedged neck or valve-seat s. This valve is carried upon a light helical spring, i?, which has power sufficient to raise the Valve to its seat, and yet permit such valve to be readily depressed by the air forced from the bellows in the case of the port H and by the pressure ot' the spring-seated rod a in the case ot the port I, which rod is provided with a cap, O, and returning-spring, and acts to open the eduction-port I when the air is to be discharged from the apparatus, which is accomplished by pressure of` the finger of the operator. The rod u is seated in a portion of the housing X, which protects the bellows and aords a pivotal bearing for the handle or lever L.

Vv'hat is claimed isl.v The combination, with the top plate7 B, recessed tonreceive the bellows, ot the metal plate F, substantially as described.

2. The combination, with the bed-plate A, ot' the longitudinal strengthening-rib 13, slibstantially as described.

3. The combination, with the body 30, having fiangedA bottom, screw-threaded flanged bottom member, 31, having air-passages, and carrying puppet-valve t e, with cushioned head, and screw-threaded top member, 32, having air-passage and neck-like valve-seat S, substantially as described. y

4. The combination, with the air-bagD and the plate F, having a anged seat, ofthe flanged body and flanged bottom member, 31, of the air-valves, whereby a rigid seat and air-tight joint are effected, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JACOB S. SAMMONS.

Vitnesses:

GEo. H. GRAHAM, T. H. PALMER.

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