US824325A - Registering mechanism for printing-presses. - Google Patents

Description

PATENTED JUNE 26, 1906.

H. A. W. WOOD.

REGISTERING MECHANISM FOR PRINTING PRBSSES.

APPLICATION FILED OCT. 19, 1892. RENEWED AUG. 30. 1905.

2 SHEETS-SHEET 11 IHIIH PATENTED JUNE 26, 1906,

H. A. W. WOOD.

REGISTERING MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED OCT. 19, 1892. RENEWED AUG. 30, 1905.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE,

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR TO THE CAMPBELL PRINTING PRESS & MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK;

Specification of Letters Patent.

ratentecl June 26, 1906.

Application filed October 19, 1892, Renewed August 30, 1905. Serial No. 276,480.

To all whom it may concern.-

Be it known that I, HENRY A. WISE Woon, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Improvement in Registering Mechanism for Printingl?resses, of which the following is a specification.

The aim of this invention is to provide a device for securing absolute register between the impression-cylinder and reciprocating bed of a multirevolution cylinder printingpress; and to this end the invention consists der of the mechanism described and claimed in this specification and illustrated in the accompanying two sheets of drawings, in which- Figure 1 is a side elevation of part of a press with my improvement applied thereto. Fig. 2 is a sectional elevation at right angles to Fig. 1; and Figs. 3 and 4 are sectional elevations taken on line 3 3, illustrating the bed on its different movements.

I will further describe my invention as applied to the well-known two-revolution singlecylinder printing-press, but with the understanding that the same may be applied to any multirevolution press, whether the same is a single or multicylinder. In presses of this character the cylinder is continuously rotated in the same direction and the bed is reciprocated back and forth under the cyliny any one of the common mechanisms for this purpose, and it is usual from the beddrivin mechanism to use gearing whereby the cy inder will be positively turned, and my improvement constitutes an addition to these old parts. When the bed is making its printing or forward stroke, the cylinder, with the sheet thereon, is brought with pressure against the form, so as to make the impression, and when the bed is making its backward or return stroke the cylinder is raised so as to clear the form, and the sheet is delivered from the cylinder. In this type of presses great difficulty has been experienced in securing an absolute register of the bed and cylinder during the printing stroke, because necessarily so much gearing and so many connections are required between the bed-driving mechanism and the cylinder that the lost motion between said members and connections renders it practically impossible for the cylinder and the bed to come into operation twice absolutely in the same relation. To remedy this evil, I place a rack on the bed. and a corresponding gear or segment on the cylinder, and I make the depth of the teeth or the mesh of this gearing very shallow, so that the same will be thrown out of mesh during the return stroke of the bed simply by.

virtue of the vertical lifting movement of the impression-cylinder. Thus, for example, if the vertical movement of the cylinder is foursixteenths of an inch I may make the gearing mesh three-sixteenths of an inch, so that the same will clear one-sixteenth of an inch when the cylinder is raised and the bed upon its return stroke. As this registering-gearing, as before described, is preferably of very fine mesh, it would not do to place entire dependence upon the same for the purpose of turning the cylinder in unison with the forward movement of the bed. Therefore I use in connection with this registering-gearing any of the usual gearings by which the cylinder will be constantly rotated in one direction, and thus when the bed makes its forward movement the cylinder is turned primarily by this driving-gearing and is simply kept in absolute register by the registering mechanism before described. This is an important improvement, because if nothing was used to help the registering mechanism the same would rapidly wear and would be very apt to break, because, as before stated, on account of the fine mesh of the teeth'the strength of the registering-gearing is very slight.

Referring now to the drawings and in detail, A represents the usual framing of the press, and in this framing is mounted the impression-cylinder B and the reciprocating bed C. On the side of the impression-cylinder B, or fixed in any suitable way to turn with the impression-cylinder B, is the registering-gear D, and a cooperating registering-rack E is secured to the bed.

The shaft of the impression-cylinder may be mounted in eccentric bushings G, which have extending arms, and to which arms are connected the links 9, which links are connected to arms or levers g, which are mounted on a shaft, as shown, and this shaft is oscillated by any of the well-known mechanisms to alternately raise and lower the impression-cylinder at the proper time. Any other of the wellknown mechanisms for raising and lowering the impression-cylinder may be used.

Rigidly secured on the outside of the shaft of the impression-cylinder is the cylinderdriving gear F, and meshing with this driving-gear is the intermediate E, into which meshes the driving-pinion I, and to the shaft of this driving-pinion I power may be applied, if desired, to drive the machine. Meshing with the intermediate H is the dou ble-faced pinion J, which is mounted on the tumbling-shaft K, and on the other end of the shaft K is mounted the pinion L, which meshes with a rack M, secured to the bed. The pinion J is mounted in a suitable frame N, which has extending arms or studs N, which are journaled in brackets k secured to the frame A, as shown. The gear L will alternately engage the top and bottom of the rack M and will thus reciprocate the bed forward and backward, as is well understood. This movement of the bed will be at a constant speed during the printing period, which eriod occurs after the movement of the bed as been reversed. at the end of the backward stroke and. the velocity of the same increased from zero to maximum, while the pinion L works on the top of the rack M and until the reversal movement, when the bed is at its extreme forward position, commences. Any other well-known bed-driving mechanism may be used, provided the same has gearing connected to continuously and positively rotate the impression-cylinder in the same direction.

In Fig. 3 the bed is shown on its forward or printing movement andthe gear D as in mesh with the rack E, whereby register is secured between the impression-cylinder and the form.

In Fig. 4 the impression-cylinder is shown as raised, the gear D and the rack E out of mesh, and the bed on its return movement.

By driving the impression-cylinder continuousl y and positively at all times in the same direction by means of the driving mechanism before described it will be seen that when the bed is on its forward movement the cylinder will be moved by two means namely, by gear F and by the rack E, meshing with the registering-gear D. Thus wear will be saved, as before described, on the registering mechanism, and the registering mechanism will simply act to take up the backlash that is necessarily inherent in the driving-gearing. Also it will be seen that by this means when the impression-cylinder is lifted the same will be further rotated by the driving gearing and that no jar or shock will occur, as the driving-gearing will simply continue in action.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is

1. In a multirevolution cylinder-press, the combination of the impression-cylinder and the reciprocating bed, gearing for reciprocating said bed so that the same will have a constant or even speed during the impression period, gearing for continuously and positively rotating the impression-cylinder in one direction at a constant speed, means for raising and lowering the impression-cylinder, a registering-gear rigidly connected to turn with the impression-cylinder, and a cooperating registering-rack rigidly secured to the bed, the mesh of the teeth of the registering gear and the rack being less than the vertical movement of the impression-cylinder, whereby the said gear and rack will be thrown out of mesh simply by virtue of the vertical movement of said impression-cylinder, and whereby when said impression-cylinder is down, it will be driven both by means of its driving-gear and by means of the registering mechanism.

2. In a multirevolution printing-press, the combination of the impression-oylinder and the reciprocating bed, mechanism for recip rocating said bed, gearing for continuously and positively rotating the impression-cylinder in one direction at a constant speed, consisting of a cylinder-gear rigidly secured to turn with the impression-cylinder and. a 00- operating gear for driving the same, means for raising and lowering the impression-cylinder, aregistering-gear connected to turn with the impression-cylinder, and a cooperating registering-rack rigidly secured to the bed, the mesh of the teeth of the registeringgear and the registering-rack being less than the mesh of the teeth of the cylinder-gear and its driving-gear, whereby when said cylinder is performing the printing operation, it will be positively turned both by said gears and by the registering-gear and the rack, and when it is not performing the operation of printing, it will be driven only by said gears, the mesh of the teeth of the registering-gear and the rack being less than the vertical movement of the impression-cylinder.

3. In a multirevolution cylinder-press, the combination of the impression-cylinder and coacting bed, said bed carrying a rack, a driving-pinion engaging said rack, gearing positively connecting said pinion with the impression-cylinder so arranged that the bed will be reciprocated forward and backward and at a constant or even speed during the printing period and the impression-cylinder rotated continuously in one direction at a constant speed, means for raising and lowering the impression-cylinder, a registering gear rigidly connected to turn with the impression-cylinder, and a cooperating registering-rack rigidly secured to the bed, the mesh of the teeth of these parts being less than the vertical movement of the impres- In testimony whereof I have hereunto set sion-cylinder, whereby the said gear and rack my hand in the presence of two subscribing will be thrown out of mesh simply by the verwitnesses.

tical movement of said impression-cylinder, H. A. WISE WOOD. and whereby when said impression-cylinder Witnesses:

is down it will be turned or rotated both by JOHN J. MURRAY,

its gearing and by the registering mechanism. PHILIP STRAUB, Jr.

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