US9259A - Printing-press - Google Patents

Description

UNITED sTa'rEs :PATENT oEEroE.

CHARLES W. HAWKES, OF BOSTON, MASSACHUSETTS.

PRINTING-PRESS.

Specification of Letters Patent No. 9,259, dated September 14, 1852.

To all whom t may concern:

Be it known that I, CHARLES W. I-IAwKEs, of Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in- Printing- Presses; and I do hereby declare that the following is a full, clear, and eXact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1 is a perspective view, Fig. 2 is a longitudinal elevation, Fig. 3 is a View of the back side of the platen, Fig. t is a View of the under side of the upper nipper jaw, Fig. 5 is a side view of the upper nip er jaw on the nipper rod) with the trip anc spiral spring attached, Fig. 6 is a. side view of the lower nipper aw with the adjustable spring and rod attached, Fig. 7 is a plan of the lower nipper jaw, Fig. 8 is a view of the back end of the lower nipper jaw, Fig. 9 is a section of the platen with the nippers attached thereto.

The same letters refer to like parts in all the figures.

To construct this machine a substantial frame A, A, is formed of a suitable capacity to contain the required machinery as shown in Figs. 1 and 2. In the upper part of the frame, there is a large girt or back bar B which supports the form bed C, and directly in front of the bed, the form or type D, is placed slightly inclining forward. Before the form there is a platen E, made to turn up and down on pins at F. Directly back of the form bed there is a rocker shaft Gr, made to turn in boxes on the frame at I-I, and an outside rocker arm I, on each end of the said shaft, which swings back and forth outside of the frame. At eitherside of the frame there is a connecting rod J, one end of each rod is attached to the lower end of each outside arm by a pin at K, and the other ends are attached to the platen by a projecting stud L, on either side. On the rocker shaft of the said lever near the center of its length, which rolls on a cam directly beneath it. Below this lever there is a revolving shaft T, with journals fitted to turn in boxes on the frame at U, and on the said shaft between its journals there is a cam V, directly under the roller. When the revolving shaft is set in motion, the cam .working against the roller throws the lever up, and turns the rocker shaft partly around, thereby swinging the platen up to the form and back again, at every revolution of the revolving shaft. A rocker shaft backr of the bed operated by a cam to swing the platen up and down, has a very great advantage over a revolving shaft, as it gives a much longer space of time to dwell on the impression. By this arrangement the platen can be made to rest, when down, a sufficient length of time to lay on sheet of paper and to dwell on the impression any length of time required.

Having thus fully described the operation of the platen, I will now proceed to describe the operation of the nippers for holding the sheet.

In Figs. 1, 2, 3, 5 and 6, near the lower edge of the platen there is a nipper rod a, with each end fitted to turn in th-e legs of the platen at b, and near one end a trip c, is made fast to the rod, with a spiral spring d, acting against it. The nippers are composed of two jaws viz. the upper nipper jaw e, and the lower nipper jaw f, and fitted to slide back and forth on the nipper rod, and secured in any required position by means of a set screw g, in the hu of the upper nipper jaw. The lower nipper jaw is fitted loosely to the nipper rod, and has a short leg h, projecting downward as shown more clearly in Figs. 2, 6 and 9. In Figs. 2, 3, 6 and 9, there is a long adjustable spring i, with an ear turned out at each end to receive a small rod j, for the leg of the, lower nipper jaw to rest against. rIhe rod j, hangs in the ears of the adjustable spring and runs parallel to the nipper rod, (see Fig. 3), the use of this rod is to bear against the leg of the lower nipper jaw and thereby hold the nippers up a short distance from the platen. In Figs. 3 and 9, the adjustable spring z', is attached to the under side of the platen by a bolt c, near the center of its length. There is a set screw Z, under each end of the adjustable spring for the purpose of setting the ends of the said spring, to-

gether with the rod j, in the required position. In Fig. 9, the hub of the lower nipper jaw has a projecting leg h, which rests on the rod j, for the purpose of holding the nippers up from the platen. The adjustable spring is of sufficient power to hold the rod y', in its required position and to counteract the pressure of the upper nipper jaw, consequently the rod j, bearing against the leg h, will hold the nippers up from the platen as clearly shown in Fig. 9. The use of the set screws Z, is clearly shown in Fig. 3; by turning the set screws in, the ends of t-he adjustable spring i, fall back, pulling the rod j, with them, and as the leg it, of the nipper rests upon the said rod j, the nippers will turn up from the platen. Thus by turning the set screws Z, in or out the nip pers are elevated from the platen or depressed at pleasure and when the said nippers are set a proper distance above the platen the adjustable spring and rod j, will hold them firmly in that position. In Fig. 7 is shown an offset in the lower nipper jaw, permitting the outer end to pass under the upper nipper jaw. In Fig. 4 there is a groove m, cut into the under side of the hub of the upper nipper jaw. In Figs. 6, 7 and 8, there is a tongue n, projecting from the leg of the lower nipper jaw fitted to play loosely in the groove m, of the upper nipper jaw. The use of this tongue and groove is to prevent the nipper jaws from sliding apart, and at the same time having a sufficient play to permit the jaws to open and shut freely. In Fig. 2, there is a pin 0, set in the frame for the trip to strike against when the platen turns down. These nippers are designed more particularly to hold the edge of the sheet free from the platen; and there can be a pair at each end ofthe sheet if required, made rights and left's. By means of the set screws Z, the lower nipper jaw can be raised a little above the platen as shown in Figs. 2 and 9, and when the platen swings up, the trip c, rises from the pin 0, and by the action of the spiral spring d, against the trip c, the upper nipper jaw e, is turned down on to the lower nipper jaw f, and thereby holds the sheet firmly between the jaws of the nippers until it is -their proper position by set screws t. Vis also a fixed arm to, on one end of this rod perfectly free from the form after an impression is given. In Figs. l, 2 and 3, near the upper edge of the platen there is a rod p, fitted, at each end, to turn in ears g, which project from the sides of the platen. There are one or more fingers 1', fitted to slide loosely on the said rod, and secured in There outside of the ear; then to operate these fingers there is a coiled spring e, one end of which is made fast to the end of the arm u, by a pin at w, and the other end is wound around and made fast to a stud in the frame at l/Vhen the platen swings up, the tendency of the sprmg is to turn the fingers down on to the face of the platen and hold them firmly in that position until after the impression is given, and when the platen has returned nearly to its lowest position the action of the spring is reversed and the fingers again turn up from the platen. These fingers are designed more particularly to be used on large presses where a very large sheet is to be printed, to hold the upper edge of the sheet firmly to t-he platen until it is perfectly free from the form after an impression is given.

Having thus fully described the construction and operation of my improvements, I will now point out lthe parts which I claim as my invention, and desire to secure by Letters Patent.

1. I claim a pair of nippers so constructed as to draw the paper from the form by gripping the margin of the paper firmly between the jaws of the said nippers, and at the same time holding the paper a little distance from the platen, as herein described and set forth.

2. I claim the adjustable sprin i, and

rod j, for holding the nippers up rom the platen as herein described.

3. I claim the fingers r, for holding the edge of the sheet in combination with the swing platen as herein set forth.

CHARLES W. HAWKES.

Witnesses:

LYMAN MASON, M. DYER, J r.

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