US1824436A - Impression adjusting mechanism - Google Patents

Description

Sept. 22, 1931. F. LAMATSCH IMPRESSION ADJUSTING MECHANISM Filed NOV. 16, 1928 2 Sheets-Sheet l INVE NTOR A'rrY.

Sept. 22, 1931.

F. LAMATscH v 1,824,436

IMPRESSION ADJUSTING MECHANISM Filed NOV. 16, 1928 2 Sheets-Sheet 2 INVEN'roR MQW/5&4

Patented Sept. 22, 1,931

UNITED STATES PATENT OFFICE FREDERICK LAMATSCH, 0F GRANTWOOD, NEW JERSEY, ASSIGNOR TO R. HOE & CO., INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK IMPRESSION ADJUSTING- MECHANISM Application led November 16, 1928. Serial No. 319,835.

T his invention pertains to machines used in the printing art andespecially to printing machines in which an impression is made between a cylinder and a co-acting impression surface which may be of cylindrical form.

As is well understood by those versed in the art, it is necessary to provide means to adjust the pressure with which the impression is made and it is customary to arrange the bearings of the cylinder so they maybe shifted to increase or diminish the pressure. This adjustment as heretofore performed has been a diiiicult operation requiring the use of thickness gauges and extreme care on the part of the operator to obtain the setting of the bearings at both sides of the machine that will insure thecorrect pressure on the sheet to be printed as it passes between the cylinders. f

The difficulty mentioned above has been overcome by the invention disclosed herein,

` the especial object of which is to provide a mechanism to accurately and expeditiously adjust and secure the cylinder of a printing machine with respect to its co-acting impression member, and by easily readable means, indicate the magnitude of the adjustment and the position of each end of the cylinder with respect to the other end, and to the impression member.

It is also an object of the invention to provide an impression adjusting mechanism of generally improved construction. whereby the device will be simple, durable and inexpensive in construction, as well as convenient, practical, serviceable and efficient in its use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed, itsbeing understood that various changes in the precise embodiment of the invention herein disclosed may be. made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanyingdrawings:

Figure 1 shows the invention applied to the form cylinder of a rotary printing ma-v Figure 4 is a fragmentary View partly in section showingthe .adjusting mechanism as viewed in the direction of arrow l of Figure 1; and

F ignre 5 shows the indicating device as l viewed in the direction of arrow 5 of Figure l.

In the embodiment of the invention shown in the drawings, 11 indicates a side frame of a printing machine, having a printing couple consisting of a cylinder 12, carrying a printing plate or form, and'co-acting impression cylinder 13, a portion ofwhich is shown.

Means are'provided for movingtlie printing cylinder 12 toward or away from the impression cylinder 13 by the eccentric bushing 14; fitted to have a limited arc of rotation in the frame 11. The bore ofthe bushing may, as shown in the drawings, be fitted to receive the outer member 15 of a roller bearing, having rollers 16, supported in a cage 17, and an inner member 18,/to which the journal 19 of the cylinder 12 is fitted.

The bushing 14 ,is formed with a flange 20 which is engaged by the clamps'21 and 22,' secured to the frame 11. The bushing is thus held to its seat in the frame.

` End thrust of the cylinder in either direction is absorbed by a deep groove ball bearing consisting of an outer member 23, balls, one of which is shown at 241, and an inner member 25. The inner member is secured to the 'cylinder journal and the outer member is secuied to the bushing 1&1, being clamped thereto by the ring 26, held by the bolts 27.

A segmental gear 28, is formed on the ring 26, and a co-acting worm 29 is carried by the shaft 30, which is supported in bearing brackets 31 and 32, both of which are secured to the frame 11. The bracket 32 is slotted and provided with a clamping screw 33, having a wrench 34 bymeans of which the shaft 30 may be clamped in any desired position.

The shaft 30 has a squared end 35, adapted to receive a wrench and is provided with a pointer 36 which is rotated over the face of an index dial 37 secured to the bracket 31.

It will be seen that by turning the shaft 30 the bushing 14 will be rotated in the frame 11, and as the bore of the bushing is eccentrically located with respect to the outsidel circumference which is fitted to the frame, the cylinder 12 will be moved toward or away from its co-acting impression member 13.

Although but one end of the cylinder and one adjusting mechanism are shown, it will be understood that the mechanism shown and described is duplicated on the opposite side of the machine and that either or both of the bearings of the cylinder may be adjusted as desired.

The dial 37 may be graduated as shown on the drawing and the pointer arranged to indicate 0 when the impression pressure is normal. Then if a greater pressure is desired the shaft 30 is turned clockwise, or for a lesser pressure it is turned counter-clockwise. With the pointer in the position shown in Figure 5, it would indicate that the impression pressure had lbeen increased by moving the cylinder bearing in, .0015 inch.

The combination of the worm gearing with the eccentric bushing greatly multiplies the movement of the shaft 30 with respect to the movement of the cylinder bearing, and inconsequence the movement of the pointer 36 with respect to the dial 37 produces a highly amplified indication of the movement of the` bearing.

As the range of adjustment required does not exceed a complete turn of the shaft 30, it will be seen that the position of the pointer y is an accurate indication of the position of the cylinder bearings and any desired movement of either end of the cylinder to increase or diminish the impression pressure can be accurately made.

What I claim is:

1. In a printing machine having a frame a printing couple consisting of a form cylin der and an impression cylinder. journals for the cylinders. bearings for the journals, said bearings for the journals of one cylinder comprising eccentric bushings rotatable in the frame, gears secured to the bushings, worms cro-acting with the gears, suitablyl supported shafts secured to the worms, means for securing the shafts to prevent their rotation, pointers on the shafts, and index plates on the frame whereby the positions of the bearings vfor the journals of one of the cylinders are indicated.

2. In a printing machine having a frame,

a printing couple consisitng of a form cylinder and an impression cylinder, journals for the cylinders, bearings for the journals, said bearings 'for the journals of one cylinder comprising eccentric bushings rotatable in the frame, gears secured to the bushings, worms co-acting with the gears, shafts secured to the worms, supports for the shafts arranged to allow the shafts to rotate and having means to lock the shafts against rotaiion, and devices whereby the positions of the bearings for the journals of one of the cylinders are indicated so they may be easily observed.

3. In a mechanism for adjusting a bearingl for a printing cylinder and indicating the position of said cylinder with relation to a cooperating cylinder, a-Ashaft rotatable in 'bearings secured to a support, means for clamping the shaft in an adjusted position, a worm on the shaft, an eccentric bushing for the cylinder bearing Yfitted to rotate in the support and having teeth adapted to engage the worm, and a pointer and a cooperating dial one of which is secured to the shaft and the other of'which is supported in a relatively fixed position.

4. In a mechanism for adjusting a bearing -for a printing cylinder and indicating the position of said cylinder with relation to a cooperating cylinder, a. shaft rotatable in bearings secured to a support, means for clamping the shaft to prevent its rotation, a worm secured to the shaft, an eccentric bushing for the cylinder bearing fitted to rotate in the support and having teeth adapted to engage the worm, a pointer secured to the shaft and an index dial fixed relative to the support and adapted to cooperate with the pointer.

5. In an adjusting mechanism for a cylinder having a journal, a bushing fitted to rotate in a bore in a frame and having a journal bearing eccentrically arranged with respect to the bore, a segmental worm gear on the bushing, a shaft having a worm meshing with the worm gear, bearings secured to the frame for rotatably supporting the shaft, means for clamping the shaft to prevent movement of the bushing, and an index and a cooperating dial, one of which is secured to the shaft and the other of which is securedto the frame.

In testimony whereof. I aiiiX my signature.

FREDERICK LAMATSCH.

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