US2372783A - Adjustment for running register - Google Patents

Description

C. JACOBSON ADJUSTMENT FOR RUNNING REGISTERS Original Filed Sept. 29, 1939 3 Sheets-Sheet l D K") a N :5 a8, a 3

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ADJUSTMENT FOR RUNNING REGISTERS Original Filed Sept. 29, 1939 3 Sheets-Sheet 3 4a;- 0a 6 a:

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403 m 1 5 40 v P 410 40.9 I i [71 yen for CHARLES J4C0B'50/V Patented Apr. 3, 1945 ADJUSTMENT FOR RUNNING REGISTER Charles Jacobson, New York, N. Y., assignor to S. & S. Corrugated Paper Machinery Company, Inc., Brooklyn, N. Y.,' a corporation of New York Original application September 29, 1939, Serial Divided and this applicationlannary 30, 1943, Serial No. 474,096

2 Claims. (QL 74-395) This invention is a division of my co-pending application Serial No. 297,052, filed September 29, 1939, and relates generally to a running register for printing mechanisms.

It has its most important use in connection with machines which treat advancing sheet material by means of operating mechanisms which should be adjusted relatively to each other so that a desired registry of operations on the sheet may be continuously maintained.

In machines for multi-colored printing, slotting and similar operations; it is necessary that a complete accuracy be obtained between difierent correlated parts or dies that operate in conjunction with one another upon material to be printed or colored. In addition to operations that involve multi-colored or colored printing, this accuracy is further a primary requisite in those operations which entail printing in conjunction with slotting or any similar operations.

The primary essential of machines for making adjustments in operations of this kind is that the adjustment be made without interrupting the constant movement of the machine and also that the adjustment be made without interrupting the main power line from the power source to the operating part.

One method by which linear adjustment of the operating mechanisms of this nature may be made is that in which by means of a gear train circumferentially arranged about the axis of the power shaft, an additional movement may be imparted to the operating drum which will tend to readjust this drum to the desired timing necessary for registry. Such additional movement may be cumulative, that is, in the direction opposite to the rotation of the drum and therefore adding to the speed of rotation thereof, or it may be in the direction of rotation of the drum and therefore tend to decrease the speed thereof.

Various advantages of this type of adjustment have been describeddn my co-pending application above mentioned, of which this case is a division.

An object of the present invention is to provide asimple adjustment by means of a worm and spiral gear combination which causes the principal gear connection from the power shaft to the operating or drive shaft of the drum itself to rotate either in the direction of rotation of the mechanism or in a direction opposite thereto and thus tend to change the speed of the drum accordingly.

Various methods may, however, be used for obtaining a running register s that the operation of, for instance, printing need not be interfered with during the adjustment and so that the adjustment may immediately be made whenever the necessity therefor is recognized. Thus, instead of momentarily increasing or decreasing the speed of the drum for the purpose of causing said drum to register accurately with the printed matter upon the sheet, a slight displacement of the axisof the drum in accordance with the deviation from registry'and in a direction ending to correct such deviation from registry will accomplish the same purpose.

Accordingly, another object of this invention is the provision of a method and means whereby the drum may be moved slightly parallel to its own axis in the directionof or opposite to the direction of travel of the sheet in order to obtain a readjustment of-the registry to the degree necessary to maintain the'predetrmined alignment.

Other objects" and uses of this invention will be pointed out in the following description and drawings in which:

Figure 1 represents a cross-sectional view illustrating the worm-spiral gear adjustment to obtain an accurate registry of the drum during the operation.

Figure 2 illustrates diagrammatically the modified method for obtaining a running adjustment of registry by means of displacement of the axis of the drum.

Figure 3 illustrates diagrammatically a modification of the method of displacement of Figure 2.

Figure 4 is a cross-sectional view of a machine embodying the form of adjustment set forth in Figure 2.

Figure 5 is a sectional view taken alone the line 55 of Figure 6.

Figure 6 is a sectional top plan view taken along the line 6--6 of Figure 4.

Referring now to Figure 1, I have here shown an operating drum 25 mounted on a shaft 80. From a suitable power source, drive is imparted through a gear 8| to a cluster gear 82-83. The

cluster gear 82-83 rotates on middle bearing 84 which is mounted on the housing 85. The gear 83 intermeshes with the gear 84' which has extended hub 85' on which is mounted a gear 86. The hub 85' is suitably mounted in ball bearing mountings as shown. The gear 88 mounted on .the hub 85 meshes with a, gear 81 keyed to the shaft 80 by means of the key'88. Thus what has just been described is the power line through which the initial source "of power is transmitted to effect a rotation of the shaft 80 and consequently the drum 25.

To effect now the desirable linear adjustment of the rotating drum 25-without interfering with its constant rotation, I employ a worm 90 operated by a motor 94. The worm 90 engages the spiral gear 9| fixedly mounted by means of the screw 92 on the housing 93. The housing 93 encloses the hub 85 and the gear 86, and is adapted to carry these gears in a rotary movement with respect to the shaft 00, As can be seen, any rotary movement of the housing and hence of the gear 84' and gear 86 mounted in hub 85' effects a corresponding advancing or retarding of the operating drum 25. Hence to effect an advancing or retarding of the drim'i 25 I efl'ect by means of the motor 94 a rotation of the worm gear 9| and hence of the housing 33. I effect the necessary adjustment of drum 25 by means of the wheel I which rotates in contact with the fixed bearing |0| mounted on the bracket I02. Rotation of the wheel I00 effects a longitudinal movement of the screw |03 which movement is transmitted through the ball bearing adapter I04 and the ball bearings I05 to the shaft 00. The longitudinal movement of the shaft 00 does not interfere with its rotary movement inasmuch as the gear 01 rides back and forth in the gear 86.

Thus there can be effected both a longitudinal and linear adjustment of drum 25 during its rotation without interrupting the operation of the machine.

Where it is not desired to resort to a momentary or permanent change in the speed of the drum by means of the combination of worms and spiral gear and the rotation of the housing, I may resort to a modified method involving the movement of the drum parallel to its axis in the direction of or opposite to the direction of travel of the advancing sheet material, thus resulting in an advancing or retarding of the printing operation or slotting operation or of any other op-- eration which at the time is progressing upon the sheet, the said sheet traveling at a constant speed. This modification is indeed the simplest possible method for performing this operation and results in a far more accurate and convenient alignment.

The operation herein indicated is set forth in Figure 2 which illustrates the arrangements of two printing units 200 and 20| and the appropriate feed rollers therefor. The advancing sheet material'202 is fed to the roller 200 by means of the feed rollers 203 and 204. The plate 205 of the roll 200 is presed upon the sheet 202, the idler 206 providing the necessary support beneath the sheet. Thereafter the sheet 202 is fed onwardly by the feed rolls 201 and 203 to the printing drum 20| where the plate 209 thereof is impressed upon the sheet, the idler 2|0 providing a support against which the sheet may be pressed. Where for instance, a two color printing process is performed by the rolls 200 and 2M, it is clear that accurate regist y must at all times be maintained. The slightest misalignment will result in a misalignment of the colored matter impressed upon the sheet and thus tend to destroy the effect which is to be created. Accordingly, should the plate 205 of the roll 200 make its impression slightly in advance of or slightly in back of the impression made subsequently by the roll 20L a confusing jumble will result.

Accordingly, when in the operation of the machine. it is found that the roll 200 or the roll 20| is making its impression at a slightly different area than intended then by means of the adjustments herein described, the roll may be moved longitudinally with relation to the sheet so that the impression will be made at the proper area and the misalignment corrected.

For this invention, therefore, it is important that the axis of the roll be moved to a slightly difierent but parallel position while the roll or drum nevertheless properly maintains the contact with the sheet at least during the printing processes.

Accordingly, as seen in Figure 2, drum 20| is shown in the normal position supported in bearings at 2, suspended from hangers indicated by the line 2|2. The hangers 2|2 are pivotable at the point 2| 3, a suitable method being provided for causing the said hanger to pivot when desired at that point.

When, as seen in the case of drum 200, the hanger 2 2' has been rotated about the pivot 2 l3 away from the dotted line 2|2" to the position indicated by the solid line, a readjustment of the drum has been eiiected so that it will print in a slightly retarded area of the sheet and thus be aligned with any change which may have been effected during the movement of the sheet. This angular movement of the axis 2| 2' causes the moment of the contact to be retarded. Obviously, a swinging of the axis in the opposite direction would advance the moment of contact.

In Figure 3, virtually the same type of Operation is disclosed except that instead of showing the movement of the axis of the drum as a swinging movement about a point outside the drum the entire drum is itself adjustable horizontally longitudinally along the line of movement of the sheet 202. The sheet 202 is in this case again fed through the rollers 303, 304 to the first drum 300, the idler 306 furnishing an appropriate support for the sheet against the drum.

The sheet is thereafter fed by the rollers 301 and 308 to the drum 30|, the idler 3|0 furnishing appropriate support thereat. As seen in the case of drum 300, a horizontal longitudinal movement of the entire drum from the position indicated by the doted lines 300 to the position indicated by the solid lines and correspondingly therefore a movement of the axis 3 l2 from "the position indicated by the dotted lines 3|2 will result in the same type of adjustment of the drum.

For this purpose it is clear that the only necessity will be an advancing or retarding of the shaft upon which the drum rotates. One method by which the operation set forth in Figure 2 may be accomplished is shown in the views of Figures 4, 5 and 6. In this case, the drum 200 is mounted on the shaft 2 which'is supported by the ball bearings 40| in the housing 402. Housing 402 is pivotally mounted upon the stud 403 which is securely mounted on the printing press frame 404. Stud 403 also carries gear 405 which rotates thereon on the ball bearings 400 and which brings the power through appropriate gears to the gear 401 which is keyed onto the printing shaft A rotating handle wheel 408 is keyed to and rotates a shaft 409 carrying a worm 0 which meshes with a spiral gear I mounted on the shaft 412. The-shaft H2 is keyed to the cam 3 which carries the link H4. The opposite end of the link 4 is pivotally connected by the pin 4|5 to the housing 402. Rotation of the handle 408 will result in corresponding rotation of the shaft 400 which through the gears H0 and All will result in rotation of the cm 3 which through the link H4 and its connecting pin 4|! will result in a corresponding movement of the housing Land therefore a movement of the shaft 2 as shown and described in Figure 2.

In each case, it will be noted that the advance or retardation of the drum is usually so slight as to require no corresponding similar movement of the support rollers. Should any greater movement however be required, then corresponding members may likewise be used to guide and adjust the support rollers as well.

I have here described certain important embodiments of my invention. Various other arrangements within the spirit of my invention will now be obvious. I prefer, therefore, to be limited not by the specific disclosures herein but only by the appended claims.

Iclaim:

1. A running adjustment for a driven shaft carrying a drum, said shaft being rotated by a. gear, comprising a driving connection between said gear and said shaft, and means for altering the position of said shaft with respect to said gear while maintaining the operative connection therebetween, said means comprising an arm pivotally mounted on the axis of rotation of said gear, said shaft being rotatably mounted on said arm, and means for moving said arm about said pivot and locking the same in selected position, said last mentioned means comprising a rotatable rod, a link rigid with said rod and pivotally connected to said arm.

2. A running adjustment for a driven shaft carrying a drum, said shaft being rotated by a gear, comprising a driving connection between said gear and said shaft, and m'eans for altering the position of said shaft with respect to said gear while maintaining the operative connection therebetween, said means comprising an arm pivotally mounted on the axis of rotation of said gear, said shaft being rotatably mounted on said arm, and means for moving said arm about said pivot and locking the same in selected position, said last mentioned means comprising a rotatable rod, a link rigid with said rod and pivotally connected to said arm, and a handle for rotating said rod, a worm gear connection between the handle and the rod whereby the rod may be locked in selected position.

CHARLES JACOBSON.

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