US592563A - Abnee geeenleaf - Google Patents

Description

(N0 M del.)

PRINTING P SS.

No. 592,563. Patented Oct 26, 1897.

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PATENT PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 592,563, dated October 26, 1897.

Application filed July 8, I895. Renewed March Z9, 1897. Serial No. 629,855. (No model.) i

To all whom it may concern;

Be it known that I, ABNER GREENLEAF, a citizen of the United States, residing at Baltimore city, in the State of Maryland, have invented certain new and useful Improvements in Printing-Presses; and I dohereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to overcome certain objections to the registering devices as at present employed upon or in connection with the impression-cylinder of printing and lithographic or similar presses, where great accuracy is required. IIeretofore such gages have either been attached to the frame and made to rest at the desired point upon or over the cylinder or they have been connected with the cylinder, but made to withdraw from the registering-point while the impressions were being taken. In each case the result has been unsatisfactory and the registering inaccurate.

My invention consists in separating the gage for the edge of the paper and the guide for the top of the paper attaching the gage for the edge of the paper to the cylinder, making it adj ustable to and from the gripper-line, but when once set to remain fixed so as to move with the cylinder, but to have no independent movement in relation thereto, and in leaving the guides for the top of the paper fixed to the usual arm supported by the frame. It will thus be seen that the gage can never vary in its relation to the cylinder, as there will be no lost motion, the gage and cylinder being practically integral.

The guide for directing the paper to the gage is left upon the arm, as is usual in such devices. I show but one arm with guide attached, and therefore refer to such parts in the singular. Two or more guides will, however, be employed, as may be found necessary or convenient.

Referring to the accompanying drawings, forming a part of this specification, Figure 1 is a fragmentary perspective showing a part of the impression-cylinder and frame With my improvement attached. Fig. 2 is an end view showing a side elevation of my improvement and a fragmentary outline of a part of the cylinder. Fig. 3 is a fragmentary perspective of the abutting gage-plate. Fig. at is a similar View of the guide for bringing the paper squarely against the abutting gage. Fig. 5 is a fragmentary cross-section of the gageholder. Fig. 6 is a fragmentary detail of the gage-plates, the lower one being slotted to permit of its adjustment and the upper plate being perforated to accommodate the bindingscrew.

Referring to'the several parts by letters of reference, A indicates the frame; 0, the impression-cylinder; B, the gage-plate, against the bent end of which the paper abuts, the end extending up through an opening in the end of the plate B. The plate or gage B passes from the opening in the end of plate 13 to the holder H, in which it is secured by means of a bindingscrew S. This screw passes through a slot which can be seen in Fig. 6. This slot permits the plate B to slide in the holder and to be adjusted by means of a screw r. The plate B rests in the holder II above the gageplate B and is perforated so as to permit the screw S to pass through it, which when forced down binds both the plates B B securely in the holder. The holder H is secured in the gripper-recess of the cylinder by means of a rod in. It will thus be seen that the gage B is, when set, practically integral with the cylinder and has no movement of its own and must therefore always remain the same, whether the stopping of the cylinder is accurate or not. To obviate imparting a separate movement to the gage, I place the guide D upon the arm E in the usual way. This arm may either be lifted to raise the guide after it has performed its function or the guide may be held at rest and have its downwardly-bent end cl recessed, as shown in Fig. 4, to permit the passage of the gage. It will thus be seen that by securing the abutting gage in a fixed position on the cylinder and leaving the guide attached to the arm E a stop-gage is obtained that Will not be subject to inaccuracies from variations in the stopping of. the cylinder or the independent movement of the gage.

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

In a printing-press, a means for producing accurate registration, the same consisting of an impression-cylinder provided with an abutting gage, fixed 0n the cylinder and movable with it, in eombination'with a guide above the paper for directing the edge of the paper to the gage, said guide being independent of and not movable with the cylinder, as set forth.

, In testimony whereof I have affixed mysignature-in presence of two witnesses.

v ABNER GREENL AF.

I Witnesses:

ROGER N. GULL, -A. F. CONNOLLY.

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