US2365528A - Apparatus for joining the webs of paper rolls - Google Patents

Description

Dec. 19, 1944. P. DiETRXCi-I 2,365,528

APPARATUS FOR JOINING THE WEBS OF PAPER ROLLS Filed Feb. 16, 1940 3 Sheets-Sheet l 65 116 J15- J:' I 1/7 65 7 6 7065 67 O 1/4. Fly. 6o

3rmentor Ma m attorney 'Dec- 1944- P. DIETRICH I 2,365,528

APPARATUS FOR JOINING THE WEBS OF PAPER ROLLS Filed. Feb. 16, 1940 3 Sheets-Sheet 2 v 3nnet ltor Mgg-LM W q )1;

(Ittorneg 5 Sheets-Sheet 3 F. DII-ETRICH Filed Feb. 16,

APPARATUS FOR JOINING THE WEBS OF PAPER ROLLS Dec. 19, 1944.

Patented Dec. 19, 1944 APPARATUS FOR JOINING THE WEBS OF PAP-ER ROLLS Paul Dietrich, Augsburg, Germany; vested in the Alien Property Custodian Application February 16, 1940, Serial No. 319,192 In Germany February 24, 1939 8 Claims.

Th invention relatesto a device for sticking the rear portion of a running-down web to a new roll in which the new roll is carried in a rotatable frame and caused to revolve with the speed of the running-down web, and by a turn of the carrier frame is brought into position for sticking, adhesion then being efiected.

The principal object of the invention is the provision of a device of this character, used for exampl in a rotary printing machine, in which the adhesion .is effected by a pressure applying member so arranged that the adhesion can be accomplished very quickly and with the elimination of the Vigorous shocks which jeopardize smooth operation and providing a sensitive and reliable device.

It is another object of this invention to provide a novel arrangement in an apparatus of the class described wherein the tension of the web of an unwinding roll controls a brake, which in turn regulates the unwinding speed.

It is another object of this invention to providia novel means for rotating the exhausting roll and the new roll substantially at the same peripheral speeds during a web joining operation. To this end, a free wheel of known construction and a slip clutch are provided between the printing machine roller and the web or paper roll.

Other objects and advantages of the invention will be apparent from the following description, the appended claims, and the accompanying drawings in which Fig. 1 is a diagrammatic view of the sticking apparatus;

Figs. 2 and 3 show the cam device which effects the control of the electric circuit;

Figs. 4, 4A and 6 are views showing the means for regulating the speed of th hand drive;

Fig. is a view, in section, showing the friction coupling and the free wheel arrangement.

Fig. '7 is 'a diagrammatic view of the electric connections to various control coils; and

Fig. 8 is a diagrammatic showing of the electric connections between motor 62 and the mercury switch 61.

According'to the present invention apparatus for sticking the web of a running-down roll to a new roll, in a rotary printing machine or the like,

is provided in accordance with the following arrangement. The means for efiecting the pressure in the sticking operation comprises a yieldingly mounted brush. This brush is actuated by hydraulic or pneumatic pressure means, which pressure means is controlled by an electrical system in such a. manner that the web joining operation will be efiected quickly and smoothly. The electrical control system comprises a number of circuits and switches, which in turn are controlled by a cam fixedly secured upon the web roll shaft. While the cam is passing through certain positions, current is introduced into the system for operating the brush and associated parts to thereby effect a web joining operation.

More particularly and as indicated by reference numerals on the drawings in which the preferred form of the invention is shown, the threeroll-star 2 rests rotatably in bearings of the floor stand I. It carries the running-down roll 3 with the running-down web .4 and the new rail 5 which is to be stuck to the running-down web 4. After applying the adhesive, sticking is effected by the brush 6 at the end of a lever I. This lever I will be moved by torsional springs 8 on a shaft 9, which by means of pistons II or II acting on levers I0 or I0 may be turned either way. The pistons II or II are actuated by compressed air which after release by a piston valve or a valve system I3 enters into the one or the other line of piping." Control is effected by either the 'magnet I4 or I4. The air is supplied through a pressure reducing valve I6 and the piping I5. Pressure in the pressure reducing valve may be adjusted at will. The speed with which the lever I and together therewith the brush 6 is swung into operating position, may be regulated at will by means of throttlingvalves in the air pipes. On the lever I a magnet I! also is placed which actuates'the knife I8 for severing the runningdown web.

A cam 30 rotatable with each of the paper rolls tacts 33 in two places which operate together'with corresponding cooperating contacts which are also yieldingly supported by springs 35. Closing of either of the pairs of cooperatin contacts controls an electric circuit at the proper time of rotation of the paper roll, to operate the brush 6, and to subsequently operate the knife I8.

The electric circuit according to Figs. 1 to 8 may for instance operate as follows While the old roll runs down, that is before the roll star is-put in position where sticking may take place, the connection prepared between contact S2 and the electromagnetic control valve S4 is interrupted by a push button, D. There is thus no connection between contact S2 and the lifting magnet S5 which operates the severing knife I8.

Upon pressing the push button D a preparatory relay VB is energized from the positive side of t holding coil q holds these switches closed after the push button D is released. Then when the cam 30 which rotates with the new paper roll 1 closes the contact S2, the electro magnetic control valve S4 is energized and opens a compressed air pipe and the way to the piston ii. The

. circuit through the controlling coil of valve S4 at this time is through closed relay I, relay 6 being energized as a circuit is completed from the positive side of the line through closed contacts e, 7, wire 9, contact h, contacts 7',k, through D, a to the coil of relay 1 and then to the other side of the line. When this relay 1 is closed it closes its own holding circuit over I, m, n, 0, e. Thus S4 is energized and the brushes are pressed forwardly, and as the brushes are pressed, switch Si is operated to open the connection between 9',

- k and close a connection between i, p. The lever l with the brush 8 has now been swung toward the web of the running down roll which will thus be stuck onto the new roll, and as the arm 1 moved, a connection was prepared across 2, p so that the valve ST; may be energized and so that the electric coil S may be energized.

Now when S2 receives a second current impulse by means of its cam 30, it transmits current through e, f, g, h, over i, p to relay 2 and also to the two time relays ZRi and 2R2. These relays are held closed by holding circuits over 8, r, f, 6. Relay 2 opens the holding circuit to relay 2 at n, 0. Relay 2 energizes magnet S5 which operates the knife and severs the web of the old roll. With the second impulse across g, h, the two time delay relays ZRl and ZRZ were energized, ZRl closing switch t, it after a small time delay and also energizing relay 3. The energization of relay 3 supplies current to the valve controlling coil S3 so that the brushes and the knife will return to their normal position. Then after another further small time delay relay 2R2 opens the connection e, F so that relay 3 and relay 2 are de-energized. Relay 2R2 closes the connection e, 3 again and restores the original condition. Thus the coil S5 first severs the running down web and after that is accomplished the eleetro-magnetic control valve S3 will open the compressed air piping leading to the piston ii, and the lever I moves back again to its initial position. The return swing of the lever l operates the end switch SI, and the connection between S2 and S3 as well as that between S2 and S5 is thereby broken. Simultaneously the previous connection between S2 and S4 is prepared so the conditions for another sticking operation are again restored.

The Fig. 1 shows moreover that the roll shafts are provided with brake bands 40 which at M are fastened and at 42 attached to a two-armed lever 43. A spring 44 holds the two-armed lever 43 with sufiicient force against a stop 45 to balance the brake efiect. A roller 46 at the one end of the two-armed lever 43 is within reach of the circularly curved lever 41 when the roll is in the normal running-down position, without, any special brake effect taking place; since the paper roll in this position stands under the in- .fluence of the hand drive 60. In the no-load position however as in the case of roll 3 a brake effect may be caused by the lever 41, since the o cillating roller 48 is influenced by the tension of the web. If the tension relaxes the oscillating roller will sink a 'little, whereby through an intermediate two-armed lever 50 in bearings 49 a rod 5I is moved downward. This motion is transmitted to the rod 54 by meansof the twoarmed lever 53 in bearings 52, whereby the twoarmed lever 56 in bearings 56 is caused to swing counter-clockwise. By the motion of the lever 53 as well as that of the lever 56 the curved lever 47 will be moved towards the axis of the star 2 on the floor-stand I. The roller 46 will thereby be swung about the center of motion 5i and the brake band will be tightened. The reverse motion takes place when the tension of the web increases and .the oscillating roller 48 is thereby raised. A counter-weight '58 serves to balance the lever.

The hand drive is influenced by the paper roll as well as the roller of the printing mechanism. The oscillating roller 48 (see Fig. 6) is influenced by the tension of the web 4, and as, the roller 43 moves, it operates the lever 50. Lever 50 is also connected to a gear 63, the teeth of which engage a rack 64. The upper end of rack 64 is connected to the intermediate portion of a lever 65 as at I0, one end of said lever bein connected to a tilting mercury-switch 67 by means of link 65a and a lever 65b, whereas a counterweight 650 is mounted on the lever near the other end. Disposed between counterweight 65c and point .70 is a stop 66, which stop is mounted upon a second rack 68. The stop thus serves as a fulcrum about which the members 65, 65a, 65b, and (350 are balanced when the switch is in normal bold line position, as shown in Figs. 1, 6 and 8. When the web becomes too slack, the roller 48 will bodily rotate shaft 49 and gear 66 in a clockwise manner (Fig. 1), thus moving rack 64 upwardly and permitting lever 65 to be rotated in a counter-clockwise manner about fulcrum 66 by counterweight65c. The switch 6'] will then be tilted or rotated in a clockwise manner about point 61a until terminal 30 engages a terminal EM (Fig. 8). In this tilted position, the mercury I62 within the switch 6! will establish a connection between the terminal I00 and another terminal I 03 to complete a circuit comprising wires I05, I06, terminal I03, mercury Hi2,

terminal I00, contact IIH, wire I07, field coil E08 of split field motor 62, armature Nita, and wire 'Il4 is mounted on sprocket H3 and also upon another sprocket H5, the latter sprocket being fixedly secured upon a shaft IIB (Fig. 1). Shaft II6 has a gear I I! fixed thereon, and this gear meshes with a rack 68.

Upon the completion of the abovementioned circuit, the motor 62 will rotate in a direction to cause the rack 68 and fulcrum 66 to be moved upwardly. This upward movement of the fulcrum point 66 will rotate the lever 65 in a clockwise direction about point I0 and thus restore the switch 61 to normal position as shown in Figs. 1 and 8.

If, however, the web has become too taut, the

lever 65 will continue to rotate in a.clockwise 70 direction until the switch 61 tilts in theopposite direction to complete a second circuit designated by reference characters I06, I03, I02, I00, IOI', I01, I08, MM, and I09; When the last named circuit is completed, the motor 62 wi11 rotate in a direction opposite to that previously mentioned and thus move the rack 68' downwardly. To prevent excessive regulation, the rack 68, which carries the stop 66 that serves as an adjustable ful crum for lever 65, is adjusted by the motor I52 in such a way that the lever 65 operates to tilt the switch 61 before the oscillating roller '48 arrives in its normal position. The mercury switch 6! will thus break the circuit to the motor so as to prevent oscillation.

Fig. 4A is a diagrammatic plan view of the.

various parts associated with the stepless drive 69 for the band 60. This stepless drive is driven by a chain I30 mounted upon sprocket 13, said chain also being mounted upon another sprocket I3I. Integral with the sprocket I3I is a gear I32 which, in turn, meshes with a gear I32 on the shaftof cone pulley I I9. Di posed in parallel relationship to the cone pulley H9 is an oppositely pitched cone pulley I2I both of said pulleys being connected by a belt I2II. It can be seen that the rate of rotation of the driven pulley I2I is dependent upon the position of belt I on pulleys H9 and I2I. In other words, the belt I20 is shifted transversely along the peripheries of cone pulleys H9 and |2I when it is desired'to change the speed of the belt drive 60.

The shifting of the belt I20 is controlled by the motor 62. When the motor rotates in one direction as a result of switch 61 being tilted, it is necessary to increase the speed of the belt drive 60, whereas when the motor is driven in the opposite direction, the speed of the belt drive is decreased. The mechanism for shifting the belt comprises a sprocket I fixed on haft II2, sprocket chain I26, sprocket I27 and a belt shift I2t. Sprocket I21 is threadably secured upon the shank 128:; of belt shift I28; however, this sprocket is not permitted to move axially of said shank. Therefore, the belt may be shifted in either direction dependent upon the direction of rotation of the sprocket IZl.

A free wheel connection or over-running clutch II is interposed between the printing machine roller and the paper roll, this connection as shown being interposed between a wheel I4 and a wheel I3 which operates the adjustable speed drive 69 for belt 60. The free wheel connection incorporates rollers I2 that will be pressed into coupling relationship in the wedge shaped spaces between the outer wheel 13 and the inner wheel I I as long as the peripheral speed of the paper roll, as the paper is pulled off of it by the printing attains the speed of the running-down web, whereupon the sticking operation may take place as previously described. Then, as soon as the paper starts to run ofi of the new roll, the new roll will run slightly faster than the drive 60, which is held back by the one-way free wheeling connection previously described, and applies a regulated braking efiect under the automatic control of the motor 62 and the roller 48.

I claim: I

1. Apparatus for sticking the web of a running down roll to a new roll, in arotary printing machine, comprising in combination, a rotatable carrier forrotatably supporting a running down roll and a new roll, means rotatably supporting the carrier for movement of the new roll into position for sticking to the running down web,

means for rotating the new roll substantially at I a peripheral speed corresponding to the speed of the running down web, pressure means for effecting the sticking, a lever carrying said pressure means, a fluid pressure piston for operating said lever, valve means for controlling said fluid pressure piston, an electrical control device for opcrating said valve means, a cam rotatable with the new roll, and a member operated by said cam,

a yielding support for said member, an electrical contact carried by said member, a second contact cooperating therewith and adapted for yielding engagement with the first contact, and an electrical circuit automatically controlled by said contacts at a predetermined time in the rotation of the new roll, whereby said control device will be operated by said valve means to cause said pressure means to be moved against said web, a switch in said circuit, and means for'automatically opening said switch upon the rotation of said pressure means.

the carrier for movement of the new roll into position for sticking to the running down web, means including a slip clutch and a free wheel over-running clutch for rotating the new roll substantially at a peripheral speed corresponding to the speed of the running down web, pressure machine, exceeds the speed of the drive belt 60.

The speed of the drive belt 60 is limited by means of this one way freewheel connection II so that the belt cannot over-run the drive from the wheel I4 and the stepless gear 69. Under normal conditions, the steplessxgear 69 is so adjusted that the speed of the belt Bil is not quite as much as that of the peripheral speed of the paper roll so that the paper roll slips under the belt 60 and a braking force, automatically controlled by roller 48, is thus applied to the paper roll.

When the running-down roll 3 is rocked around out of reach of the hand drive 50, the band drive continues to run, as it is connected through a slip coupling I5 to the wheel 14. Then when the new roll comes up and engages the band drive 68, the new roll at the time not being rotated, it will promptly slow down the speed of the belt 60 which is operated by power supplied through the slip coupling I5, and the rotation of this new means for effecting the sticking of the running down web, a lever for operating said pressure means, a fluid pressure piston for operating said "lever, valve means for controlling said fluid pressure piston, means for automatically operating said valve means at a predetermined time in the rotation of the new roll, a roller engaging the running down web and movable in accordance with the tension of the web, and means operated by said roller to control the operation of said rotating means.

3. Apparatus for sticking the web ofa running down roll to a new roll, comprising in combination, a rotatable carrier for rotatably supporting a running down roll and a new roll, means rotatably supporting the carrier for movement of the new roll into position for sticking to the running down web, means for rotating the new roll substantially at a peripheral speed corresponding to the speed of'the running down web, pressure means for effecting the sticking, operating means for operating said pressure means, a cam rotatable with the new roll. a member operated by said cam, a yielding support for said member, a plurality of electrical contacts, arranged in parallel and carried by said member, a plurality of cooperating contacts adapted for yielding engagement with said first contacts, an electrical circuit automatically controlled by one or the other of said parallel contacts for controlling said operating means at a predetermined time in the rotation of the new roll, and means controlled by the actuation of said operating means for breaking said circuit.

4. Apparatus for sticking the" web of a running down roll to a. new roll, comprising, in combination, a rotatable carrier for rotatably'supporting a running down roll and a new roll, means rotatably supporting the carrier for movement of said valve means at a predetermined time in the rotation of the new roll, a roller engaging the running down web and movable in accordance with the tension of the web, means operated by said roller to control the speed of said rotating means, .said rotating means comprising a shaft, a belt engaging a peripheral surface 'of the new roll, a friction clutch between said belt and said haft, and a free wheel overrunning connection between the belt and the shaft.

5. Apparatus for Sticking the web of a running down roll to a new roll, comprising, in combination, a rotatable carrier for rotatably supporting a running down roll and a new roll, means rotatably supporting the carrier for movement of the new roll into position for sticking to the running down web, rotary means frictionally engaging the periphery of the new roll when the carrier positions the new roll in position for sticking, control means engaging the running down web and movable in accordance with the tension of the web, a drive member, an adjustable speed drive connection between said drive member and said rotary means, means operated by said control means for adjusting said drive connection to control the speed of said rotary means, a friction clutch interposed between the drive member and said rotary means, and an over-running one-way clutch interposed between said drive member and said rotary means and preventing over-running of said rotary means.

6. Apparatus for sticking theweb of a running down roll to a new roll, comprising, in combination, a rotatable carrier for rotatably supporting .a running down roll and a new roll, means rotatably supporting the carrier for movement of the new roll into position for sticking .to th running down web, roll rotating means frictionally engaging the periphery of the new roll sure piston,- means for automatically operating asoaeas when the carrier positions the new roll in position for sticking, a drive member operable in synchronism with the running down web, means for operating said roll rotating meansfrom said drive member andincluding a friction clutch and an over-running one-way clutch whichprevents over-running of the operating device, and means controlled by the web for automatically adjusting the speed of operation of said roll rotating means to maintain a predetermined braking effeet on the web of a freshly pasted roll.

7. Apparatus for sticking the web of a running down roll to a new roll, comprising, in combination, a rotatable carrier for' rotatably supporting a runnin downroll and a new roll, means rotatably supporting the carrier'for movement of the new roll into position for sticking to the running down web, a belt frictionally engaging the periphery of the new roll and engaged by the new v roll when the latter is brought into position for sticking, a roller engaging the running down web and movable in accordance with the tension of the web, a drive member operable in synchronism with the running down web, an adjustable speed drive connection between said drive member and said belt, means operated by said roller for automatically adjusting said drive connection to control the speed of said belt, a friction clutch interposed between the drive member and said belt and providing for gradual increase in speed of the new .roll before sticking is efiected, and an over-running one-,way clutch interposed between said drive member and said belt'to limitthe speed of the belt with respect to the speed of the drive shaft so as to apply a braking efiect on the web of the new roll after the latter is pasted.

8. Apparatus for sticking the web of a'runnlng down .roll to a new roll, in a rotary printing machine, comprising in combination, a rotatable carrier for rotatably supporting a running down.

roll and a. new roll, means rotatably supporting the carrier for movement of the new roll into position for sticking to the running down web, means for rotating the new roll substantially'at a peripheral speed corresponding to the speed of the running down web, pressure mean for effect ing the sticking, a lever carrying said pressure means, a fluid pressure piston for operating said lever,'valve means for controlling said fluid pressure piston, an electrical circuit for said valve means, a switch in said circuit automatically closed at a predetermined time in the rotation of'thenew roll, whereby said valve will be actuated and said pressure means will .be moved against said web, severing means also carried by said lever for cutting the running down web, a circuit for said severing means, and means for automatically. opening said first circuit and for closing said last-named circuit after said pressure means has been moved against said web;

' PAUL DIETRICH.

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