US1973363A - Speed controlling device for web rolls - Google Patents

Description

Sept. 11, 1934. H, w W D 1,973,363

SPEED CONTROLLING DEVICE .FOR WEB ROLLS Filed Aug. 26, 1930 3 Sheets-Sheet l I J fir/1 7/wyA%i%aa 1253M. fmmw Sept. 11, 1934. H. A. w. WOOD SPEED CONTROLLING DEVICE FOR WEB ROLLS Filed Aug. 26, 1930 3 Sheets-Sheet 2 5 /71.. C dw- Sept. '11, 1934.

H. A. w. WOOD SPEED CONTROLLING DEVICE FOR WEB ROLLS Filed Aug. 26, 1950 5 Sheets-Sheet 5 i 7 i; E

Patented Sept. 11, 1934 SPEED CONTROLLING DEVICE FOR WEB ROLLS Henry A. Wise Wood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation,

New York, N. Y., a corporation of Virgmi Application August 26, 1930, Serial No. 437,943

8 Claims.

This invention relates to a speed controlling device particularly designed for use in controlling the speed of a web roll which is to be spliced to the running web entering the printing press.

The principal object of the invention is to provide means for rotating these .heavy rolls from their centers combined with means operated from the periphery of the roll for controlling the speed of rotation so as to keep. the surface speed of the roll the same as the web speed; and to provide a speed controlling device operating on the. surface of the web roll which will be light and will not need to engage a wide surface of the roll and ,will not apply enough pressure to have any adverse effect on the web roll itself. I

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is an elevation of a web roll reel with a roll rotating and controlling mechanism thereon;

Fig. 2 is an .end elevation of the same'as indicated by the arrow 2 in Fig. 1;

Fig. 3 is an elevation of the controlling device on enlarged scale, shown partly in section;

Fig. 4 is a sectional view taken on the line 44 of Fig. 3,

Fig. 5 is a wiring diagram and Fig. 6 is a view similar to! Fig. 2 but showing the parts in the running condition.

'I'he usual and most successful form of web splicing mechanism involves means for rotating the new roll at web speed, so that the two webs will be running at the same speed when spliced. Because of the non-uniformity of the diameters of web rolls as supplied it is customary to bring the incoming web roll up to web speed by the application of a belt or roller to the surface of the web roll, and drive the belt or roller from the press at web speed. A heavy and wide belt or roller is necessary to provide adequate traction, and any misalignment of the belt will cause the new roll to be forced out at one end. A wide path must be left free of splicing'paste, and a heavy carriage must be provided for supporting and driving the belt or roller. Any sudden. change of speed on the part of the driving belt or roller, such as is encountered in slowing to a lower speed for pasting is liable to cause a ruining of the forward edge, thereby decreasing the probability of making a good splice. Moreover the surface of the new roll has to be brought up to web speed and an ordinary means for rotating it from the center which would avoid these difiiculties will not solve the problem, because the rolls are not supplied at the same diameter.

In accordance with this invention, 1 have shown the usual horizontal reel 10 carried by a shaft 11 and operated by a motor 12 by reducing gearing 13. Chucks 14 for carrying the opposite ends of the web roll 15 are mounted in the usual manner, but one of these is attached to the armature shaft 16 of a motor 17, so as to be rotated thereby. In the present case three of these motors are shown on one end of the reel, because this reel is designed to support three rolls.

This motor is arranged with resistance so that if the current comes through one pair of wires the speed of rotation will tend to increase and if it comes through another pair it will tend to decrease.

On the frame 18 of the printing press are mounted bearings for a shaft 19 which is driven through a belt or chain 20 from the press, and consequently has a speed proportionate to the speed of the press. A frame 21 is'hung on the shaft 19 between two collars and on this frame there is a casing 22 applied to the shaft 23 which is rotated from the shaft 19 by belt or sprocket chain 24.

A bevel gear 25 is mounted on a second shaft 26 located end to end with the shaft 23 and. rotatably carried in the casing. An arm 27 depends from the hub of the casing and from the shaft 26. On its free end this arm carries a stud 28 carrying a pulley 29. A pulley 30 is keyed to the shaft 26 and connected by a belt 31 with the pulley 29. A bevel gear 32 meshes with the gear 25 and with a gear 41 on the shaft 23. The bevel gears 25 and 41 face each other and are of exactly the same size.

The bevel gear 32 is located between them and meshes with both and is mounted on a radial stud 3'3 projecting inwardly from a rotatable annular ring 34. This ring is mounted with a slightly frictional contact in a sleeve 35, which in turn is oscillatably mounted in the instrument casing 22.

The sleeve 35 is provided with a radial arm carrying a bridge contact 42 and the casing 22 is provided with a gap through which this arm projects and with two contacts 36 on one side and two contacts 37 on the other side. Counterclockwise rotation of the ring 34 as shown in Fig. 4, will cause the bridge 42 to connect the a link 40 is provided for raising and lowering 10 this arm, so that the belt 31 can be brought into or out of contact with the fresh web roll.

It will be observed that this belt does not run the web roll, but the web roll is operated by the motor 17, but this belt is forced to operate at the same surface speed as the web roll, and the gearing in the casing and on the shaft 19 is so proportioned that when the new roll is rotating at a surface speed equal to that of the web, the projection 42 will remain in the position shown in Fig. 4, and both of the circuits 38 and 39 will be open and the motor will run at its normal speed.

When the roll rotates less slowly than the speed of the web, the ring 34 will cause the ring 35 to move backwardly, so to speak, and the projection i2 will close the contacts 36. The electrical connections through the wiring 38 are so made that the closing of these contacts causes the motor armature resistance 45 to be shorted out, increasing speed in the motor 17 until it is brought up to a speed to rotate the roll at web spee when the projecting arm .2 will swing back to the neutral position shown in Fig. 4. Consequently if the rotation of the roll is too fast; the arm 42 will comeback and close the contacts 37 and the circuit 39 will be completed, which will cause the field resistance 46 to be shorted out, decreasing the speed of the motor.

In thisway the roll can be kept up to web speed all the time by the use of comparatively light mechanism, as the instrument casing 22 and all of its associated elements may be constructed of light instrument parts rather than of heavy machine parts. This avoids all the objections above mentioned to the present method of operating a web roll on its circumference.

Although I have illustrated and described only a single form of the invention, I am aware of the fact that changes can be made therein by any person skilled in'the art without departing from the scope of the invention as expressed in the claims; Therefore I do not wish to be limited to the exact form shown, but what I do claim is:-

1. In a web roll rotating device for a printing press, the combination with a motor connected with the end of the new roll for rotating it, of an element engaging and operated by the surface of said roll, electric circuits for controlling the speed of the motor, and rotary means operated by said element for controlling said electric circuits to change the speed of the motor, for the purpose described.

2. The combination with a printing press and a shaft running in proportion to the speed of the running web of the press, of a driving means for rotating a web roll from its end, rotary means engaging the cylindrical surface of the web roll, means connecting the shaft with said rotary means, a differential in said connecting means, and means controlled by the relationship between the speed of the rotating means and the speed of the web for varying the speed of rotation of said driving means.

3. In a web roll rotating device, the combination with a shaft operated by a printing press at a speed proportional to the speed of the running web, of a motor connected with the center of the end of the web roll for rotating it, electrical connections to the motor for varying the speed, a belt adapted to engage the cylindrical surface of said roll to be rotated thereby at the surface speed of said roll, a shaft adapted to be operated by said belt, a gear on the shaft, a gear of the same size and shape connected with the first named shaft to be rotated thereby, a gear between the other two gears meshing with both and free to turn on its axis and to be moved around in accordance with the rotation of said gears, and means connected with the central gear for closing a circuit in accordance with the speed of rotation of the belt, whereby the motor will be speeded up if the speed of the belt is less than the speed of the web.

4. In a speed controlling device, the combination with a rotary shaft, a casing mounted thereon, a pair of opposite bevelgears of the same size, a shaft for each of said gears, one of said last named shafts being positively geared to the first named shaft, and the second having a pulley thereon, means for transmitting a motion of rotation to said pulley, a bevel gear between the other two bevel gears meshing with both, a ring having a stud on which the last named bevel gear is freely swiveled, a ring outside the first named ring frictionally mounted thereon and having a projection provided with an electric contact bridge, said casing having a pair of spaced closed by the movement of said arm to its limiting position, a driven element, and means associated with said contacts for decreasing or increasing the speed of the driven element.

5. A web splicing device for a printing press comprising means for supporting a fresh web roll to rotate on its axis, variable means for rotating the fresh roll through its axis, and means engaging the circumference of said fresh roll for operating said variable means to change the rate of transmission of speed to said fresh roll, before said fresh roll is connected to the web of the press and when said fresh roll is not otherwise connected with the press, in accordance with the diameter of the fresh roll to rotate the roll at a surface speed equal to the linear speed of the web being drawn into the printing press.

6. The combination with a printing press and a magazine reel adapted to. carry a plurality of web rolls, one of which is being fed to the printing press, of means connected with the central axis of another of said web rolls for bringing the last-named web rolls surface substantially to the speed of the running web preparatory to splicing the leading end of said last-named web roll to the running web, and means for compensating for different diameters of the successive web rolls that are rotated at substantially web speed prior to splicing.

'7. The combination with a printing press and a rotatable magazine reel adapted to carry a plurality of web rolls, one of which feeds a web to the printing press, of driving means connected with the central axis of another web roll for speeding up said other web roll preparatory to splicing its leading end to the running web, said driving means being controlled by means engaging the surface of said other web roll.

electric contacts adapted to be eweeee 3. The combination with a, printing press, a. web r011 supporting device, and a speed varying'device having two parts, of means on the surface of the web roll for operating a part of the speed varying device, means for operating the other part of the speed varying device in

Images