US2812938A - Registering drive for a web - Google Patents

Description

Nv. 12,1957 l.; H. HAsKlN, JR., E1-AL. 2,812,933

, REGISTERING DRIVE FOR A WEB Filed March 11, 1 954 2 Sheets-Sheet 1 f6 4 /5 2 5746x512 Pan/Cf! 4g if 59 48 9 /4 f K/ /l ?:El

Ml ATTORNEYS L. H. HAsKlN, JR., Erm. 2,812,938

REGIsfrERING DRI-VE Fon A WEB Nov. l2, 1957 2 Sheets-Sheet 2 Filed March 11, 1954 A"zgsizsss v.REGISTERING FoR AJWE'B Lawrence H. iHaskin, Jr., fBldonfi'eltl, `N. J., and Morris Sorkin, -New 'zYo'i-k, 'N. "Yt, ass'gnors to Champlain iC'Dmpany, vInc.,SBIOoI'nlieltl,1` N. al., a; corporation vof lN ew 2York Application Maren A11, y'1"9'54, serial No. :415,672

22 claims. remar-2.6)

This invention relates to registering `drives :for a web, and more particularly :to gan :automatically registering drive lfor ,a gprintedeweb.

There .are vmanysitu-ations "in which -a lsingle web is runthrough a series of machines .whichs-must-.be driven at different -rotative speeds. One might `be "a printing press.(for,a line ofvprintingpresses) fleadingsto a'gpunch press which severs the=web into sheets. For pli-rposesof th e.present descriptiorna metering feed 5unit .Whichfgeeds the'yvebat a 'carefully measured rate maybe considered a machine,becausegexactly thesame problem arises when pullinga previously printedweb from @roll and feeding it through a .punch lpress. l'fhefrotat'ional -speed `ratio between `the feed un-it :and the punch press may vary widely/,because ofchanges inthesize oftheprintedsheeh it being understood ithat .the .feed unit .would turn less when the sheets `being cutbythe punch gpress are short, and would turn more when the sheetsarelong.

Innitely variabledrives are.known,.and .may b e either frictinfal or positive, but :even .the soecalled positive drive tends ,tord'riftls'omewhah andisnot as satisfactory in this respect as simple Spur Vteeth gearing. On the other hand, a `change gear box, even -if :somewhat `elaborate, may not establish exactly the desired sheet;length, becausea minimum.changeset va single ,tooth in a single gear, `even if making a `di'lfrfence in sheet length ,which may 'be reduced to only thousandths .'o'f an inch, ,may nevertheless Iprove troublesome because the error .is cumulative. Y

One object of ,the present invention is to retain the benefit and yet minimize rthe disadvantages of vthe innitely variable drive, and with this object .in view we provide a main or primarychangegear box which makes it possible to obtain a speed ratio which is exactly .or very close to that desired. We further employ ya {"1 ning register of the dilerentia'l gear type between `the change gear box and one of the machines, and' We .eme ploy an infinitely variable drive to feed a slight corrective component to the correction feed-inshaftof the running' register. Thus any drift of the infinitely variable drive is applicable lto only a minute component of ythe tota motion applied.

Ditiic'lty may arise because of a change in thedens'ity and consistency of the web,rparticularly when working with cardboard. It is rare that the 'final Aprint lengths correspond exactly to the theoretical length, for .there is contraction or expansion of the web resulting from the eiiect of the driers which follow the printing units, and from the tension exerted in the V printing units yduring' the printing operation. Moreover, the feed of such .a fwebis usually obtained'by wrapping the web around acylinde, and thus half the thickness of the web is added to the radius of the cylinder in arriving at the so-c'a'lled fneutral axis of the web. However, because of changes in character of the webmateril, the neutral does not invariably remain Vin the physical center of the web. Also there may be diiferencesin thickness. A11 these difnited States Patent 2,812,93s Patented Nov. 1,2, 1957 i?! ferences cause a so-called repeat variation, meaning that the deviation in length repeats itself substantially constantly for a time, although it may vary in the 'course of afsingle roll, and usually varies from one rollio an-4 other.

Thiswould cause great dithculty with a change v`gear boX alone, even if so constructed as to make possible changes in blank length of only a few thousandths ofya'n inch, for'the gear ratio could not be changed while the machine is running, nor in a lgradual correction-seeking manner. The difficulty is largely overcome lby use ,of-the infinitely variablefdrive, for its ratio may be changed while the machine is running. The amount vof change needed "for this purpose may be kept-quite small, a'range ofchange of, say, 1/161being ample for sheets about 3 "ft. long. This helps show how small'a component of the inotion i'sbeing supplied by the infinitely variable drive, and in practice we prefer to use a drive which is reversible, andto 'establish a gear ratio in the change gearbox lwhich is substantially correct. However, it is also possible to employ a'n innitely variable drive which is not reversible, and 'to establish a speed ratio in the change gear box whichis very 'slightly offset from Vthe theoretically correct ratio. 'The difference is made up by a middle adjustrn'ent of 'the infinitely variable drive, lthus permitting use of a drive which is not reversible.

:In accordance with a further feature and object 4of the present invention, provision yis made for correcting any slight residual or occasional error '-by position correction'arndfor this purpose another running register of the differential gear type, which We shall call a position correcting register, isinsertedbetwee'n the `infinitely variable drive .and the correction feed-in shaft of -th'e main running register. The position correcting register has a feed-in shaft ydriven yby a reversing motor which Ais yoperated briefly at intervals, preferably i'n response to 'an automaticdetector systemof known type, usually a pho't# electric `eye `system cooperating with a marker on 'the' web.

VStill 4another object is to facilitate `normal correctioil ofthe ,adjustment .of `the infinitely variable drive vwhen needed, and for this purpose the increments of v'electric power used to drive the position correcting motor are also supplied to red and green lamps or equivalent signals', so that as eries of repeated flashes of one colorwill indicate the need for readjustment of the infinitely variable drive.

A still Vfurther object lof the invention is to provide automatic control means for readjusting the said drive: A more lspeciic object is to provide such a means which willchange the adjustment only after a cumulativeseries of .positionafdjustments which are all in lone direction. Another specific object is to-cause a position adjustment in one direction to cancel out a position adjustniehtin the lopposite direction, thereby eliminating random errors', and distinguishing between such errors and an .errorjin speed ratio. Still another specific object is to initiatea corrective change in speed ratio only if the cumulative series of-like changes takes place in apredetermined short interval oftime, for the machinery here controlled, `a1- though'sensitive, is ponderous, and it does not pay toattempt a change in ratio when Athe 'error .is so slight `that it takes a considerable vp eriofd of time th accumulate enough errorto be noticed by the photoelectric-eye1orlike detector system, and such an error is best treated as .a position error to be corrected as such, rather lthan asan error in gear ratio.

To accomplish the foregoing objects, .and such tether objects as will hereinafter appear, our invention resides in the registering drive elements, and Vtheir relation .one

to another, `as are hereinafter more particularly describedin the following specification. The specification is accompanied by drawings, in which:

Fig. 1 is a schematic diagram of a drive embodying features of ourinvention; .f' Fig. 2 shows a group of units with which our improved drive Amaybe employed; and Fig. 3 is aT schematic wiring diagram applicable to the drive. Y

Referring to the drawing, and more particularly to Figi 2, a previously printed web 12 is drawn from a roll 14 and is to be fed through a punch press 16, where it is. cut into sheets'which are transferred by suitable means 18V to a stacker 20. The web is pulled from the roll714V and is fed to the punch 16 by means of a first metering or feed unit 22, and a second metering or feed unit 24,\ with a slack loop 26 therebetween. There is alsoa slack lloop 28 between feed unit 24 and punch press16, butit will be understood that this is variable and.' merely to accommodate the intermittent action of the punch press, while the web dwells in the press, and accordingly the loop 28 disappears for an instant during each` cycleof the press.V In the present case the feed unit 24 is provided with means for automatic side-to-side registerpand itv is'primarily because of this that the first feedrunit 22 is used, for its main purpose is to provide theslack Aloop 26jwhich in turn facilitates operation of the -side-to-side/register inv feed unit 24. Without the side-'to-side register'a single feed unit preceding the punch pressY would be adequate. e T herel` is a main drive shaft 30 driven by a motor 32, and shaft 30 drives the stacker 20 through gearing housed at 34.' It drivesrthe feed unit 24 through gearing housed at 36. Itdr'ives the punch press 16V through gearing housed at 38 andthrough a shaft 39 and a main change gearboxf40'which establishes almost the exact desired speed ratiofbetween the feed unit 24 and the punch press. The change gear box 40 could be interposed between the mainshaft and the feedV unit 24, instead of between the mainrshaftv andl the punch press 16. Either of the gear housings 36 and 38V, in this case gear housing 36, carries a running A'register of the differential gear type. The two feed units 22 and 24 are driven in unison, as by means of ja special connecting shaft 42, connected through gearingfat148`and 49and are connected through the feed hunit24,and gearing at 36, to the main drive shaft 30,U

Referring now to Fig. lj of the drawing, the main shaft 30 isjjrconnectedf to the'puneh press 16 through change gear box 40 and additional gear housing 38, as is clearly shown. The drives 100 and 102 may be chain or gear drives. The main shaft 30 is connected to the metering orfeed unit 24 through a gear housing 36 which includes a runningfregister 44 vthecorrection feed-in shaft and worm of which arej Vshown at V46 and 47. The running register of Vdifferential gear type need not be explained in detail, it being shown in the U. S. Patent No. 2,163,035 issued June 20, 1939, to the assignee of William F. Grupe. Theshaft which inter-connects the first and second feed units, and/ drives the same in unison, is shown at 42, and operatesthrough bevel gearing or equivalent at 48.

The infinitely variable drive is shown at 50. Its input shaft 52 is driven at constant speed by main shaft 30 through a chain drive 54. The output shaft 56 is connected through a chain drive 58 to the feed-in shaft 46 of theV running register 44. The variable speed drive shownV is a Grahamv drive, which Yis reversible. Nonreversible variable speed drivesV such as the Reeves, and the P. I. V. drive made by Link Belt, as well as other standard reversible or non-reversible drives may be used.

Another running register of the differential gear type is'shown at 60, this being interposed between the infinitely variable drive *V50VY and theVfeed-in `shaft 46 of running register 44. The differential gear mechanism 60 is a position correcting register, for it is run only intermittently for short intervals of time. Its feed-in shaft 62 is driven through an intermediate shaft 64 and chain drive 66 by a reversing motor 68. The reversing motor may be either an alternating current or direct current motor, and inthe present case is an alternating current motor with built-in reduction gearing. The motor is itself controlled through wiring indicated schematically by line 70- connected to a panel box 72, which in turn forms a part of an electric eye registration control system of the type disclosed more fully in Patent No. 2,348,862 entitled, Registration Control Apparatus, and issued May 16, 1944, to the assignee of Morris Sorkin, one of the present inventors. The detector system includes a photoelectrie eye 74 and a phase detector 76.

The gear ratio of the variable drive 50 is adjusted by rotation of a control shaft 80. Such drives commonly have an indicator, Shown at 82, but the indicator is not important or significant for the present purpose because the adjustment is preferably accomplished automatically. For this purpose we provide another reversible motor 84, which is preferably like the motor 68. In the present case it is a reversing A. C. motor with built-in gear reduction. The motor 84 drives adjusting shaft 80 through a gear reduction, for example using a worm 86. The motor is connected to the panel box 72 through appropriate connections, here indicated by a single line 88.

At the panel box 72, or at any other convenient and desirable location, we provide a pair of signals 90 and 92. Most simply and in the present case these are a red and green lamp respectively. These indicate the operation of the position correcting motor 68. If desired another pair of red and green signal lamps 94 and 96 may be provided to indicate the operation of the speed ratio adjusting motor 84.

Fig. 3 is a wiring diagram for the apparatus, but the diagram has been simplified by showing only a fragmentary part of the diagram of the photocell or electric eye registration circuit, which is disclosed fully in the aforesaid Sorkin Patent 2,348,862. The diagram of Fig. 3 is readily related to and may be combined with the diagram in the Sorkin patent with the following information. The tubes V1 and V2 are thyratron tubes which correspond to tubes 65 and 66 in the patent. The tube V3 corresponds to the tube in the patent. The relays K5 and K6 correspond to relays 75 and 78 in the patent, and the relay K7 corresponds to relay 84 in the patent.

There are a number of relays used, some of which have a considerable number of contacts moved in unison, but in order to simplify the diagram in accordance with up-to-date across the line practice, the contacts have been located where their switching function is performed, and are not grouped together as they are strueturally. However, the relay coils are numbered, and the relay contacts are similarly numbered but with an additional numeral to indicate which of the multiple contacts of the relay is referred to. In Fig. 3 all of the relays are shown de-energized, and in the description the term make is. used to referto the condition of the relay when it is energized. Y.

Theupper'part of` the wiringdiagram, including the mainrrelays` K5 and K6 controlled by thyratron tubes V1` and V2, are a part of the position correcting registrationY system as described in the aforesaid Sorkin Patent 348,862.2Y They control the position correcting motor 68, .The lamps 92 and 90V are shunted across the two sidesof Vthrereversible motor control circuit and may be colored. green and red, green indicating that the web is. beingadvanced ,andred indicating that the web is being retarded. The tube V3 acts as a timer, it having a condenser C2 and a Vresistor R1, the adjustment of which determines howy long `an interval -will take place asiagss grammar for.abdsfntsrval.ottima-sar atrae 59.11 `Qf .alecosd '.Wlah may be ope-third@ .fsaefteatll is 1011's 41S thetimeitis Offbeforetif c anagan be-m11, as'explainedV in Patent I2,348,862.

The iower part. of the, circuitisa symmetrical circuit centering about thyratron tubes V4 .and V5 controlling relays K8 Aand K9, ,much Las in the upper .parof Ithe circuigexceptthat in -the lowercircuitthere is arpulse accumulating action. More, specifically, ther-eis Y a; small condenserC7 (or C4) lwhich f'or .each pulsedischarges into a llarge condenser C6 (orCS), thereby raising the potential 'across the large condenser a I predetermined arnonngisay onevolt. After a desired ynlirirlycrof,.pulse(s, the potential across :the large Acondenser C6 isliigh enough to inake the thyratron V conductive, thereby i operating ih? relayK9. The Vnumber of pulses required to operate the'relay, say five to ten pulses, willdepend on the bias of the thyratron tube, .which in,turn is .controlled bythe potentiometer R3.

{Ifhegroup ofsuccessive pulses must take Aplace within alimited time, say fteento thirty seconds, .Lin order to operate the relay. For this purposethere is .a resistor j-R-7 connected across the large condenserC and actingas'a leak, r:and the adjustment of ,the .resistor `4R7 determines the time period within which the desired-number of pulses must take: place.

l The snccessivepulses must be inthe samedirection. If ofwoppositedirection they cancel out. 'i'hereasodfor this is explained later.

lAftereach operation of .either relay the circuit isvrecycled, and for this purpose the condensers C5 and C6 are discharged completely, for which purpose there alge entracontactson the yrelay K which shuntfthecondensers C5 and C6. Relay K10 is controlled bytube V6 which is a timer tubewhich controls-forhow long ,an intervalthe speed correcting motor.84 will run. This in turn is adjusted by the resistor R4. The interval may be a matter of a fraction of a second, say, 1; to 1/2 a second, andthe motoris thenkept off forca ,longertima s ay, threeto tentimes asvlong.

'The operation may be described in greater -detail ,as follows. The thyratrons V1 and V2` receive pulses from a web amplifier las pickedup by the photoelectric'web scanner, andby the early'and late gates -frorn thehphase detector. If the web pulse coincides Yin time with any portion of the early gate thyratron V1 conductsand enengizes relay K5.v If the web pulse coincides `in time withI any portion of the late gate, thyratron V2 conducts and'ener'gizes relay K6. Relays K5 and lK6 each l have four sets of contacts. Set #1, that is, contacts KS-,l or Kid- 71, start the intervaltimer V3. Set 2, thatis, con tacts Kyi-,2 or K6-2, control indicator lights H90 and 9 2 and the position control motor 68, through appropriate contactors Kland K2 ifrelectric motors are used 4as here shown; or electrically controlled .valves if hydraulic .or pneumatic motors are used. These vtwo sets ofcontacts areall that the relays have in `VPatent 2,348,862, but in order to expand their function to include automatic -speed correction, two extra sets of contacts are added to each. Sets v#3 and 4 feed information to the new circuit shown in the vlower part of Fig. 3.

vIn order vto illustrate the operation `of `the new circuit let us assume that the-web is ahead of the positionwhich it should have -for proper registration. The following sequence of events takes place:

(.1) Web pulse coincides with early lgate.

y(3) Relay K5 is energized, switching the movable contacts tothe make position.

(.4) Contacts yKS-l start the interval timer consisting of tube V3 and associated components.

(15) Contactsv KS-Z energize retard position indi cator light 90- and motor contactor K2;

(6.)ontacts K5-3 disconnect ,capacitor IC7 Afrom 6 dalyglts Supplyand .C Oanef'lit asrossastoragefpapactar C6. Since C7 was charged by thevoltage ditferencefof volts (150 v. -75'v.) and `theratioofcapacitors C7/C6 is, say, v80, the voltage across .storage capacitor C6 rises by .92 volt.

(7) Contacts K5-4 disconnect capacitorCS from 0 volt and connect if .across capacitor C5. vSince C3 was charged by the voltage diierenceof -75 volts (OJ/,5 -v.) and the ratio of capacitors C15/C5 is 80, Ithe voltage across C5 is decreased by .92 volt.

l (8) Tube V3 conducts after an interval `determined by capacitor CZVand resistor R1, therebyvenergi-zing na relay K7, and opening contact set-K7-1.

(9) Contacts K7-1 open, cutting off theiplatecurre'nt of the thyratron V1, and` so releasing relay K5, ands witch ing the movable contacts to the break position.

(10) AContacts K5-1 switch capacitor C2 to rt-1:50 volts, lthrough contactsvKG-I vand R2. Contacts TKESeZ cut oif retard position indicator light 9 0 and motor contactor K2. Contacts 'K5-3 reconnect capacitor C7 to volts. Contacts K5-4 reconnect capacitor C3 to/O volt.

(11) Tube V3 is cut off after an interval determined =by capacitor C2 and resistor R2, releasing relay K7, and reconnecting the plate of thyratron 4V1 to +300-volts, through relay K5.

(12) The quiescentfcondition is now restored, with all relay contacts'inthe position shown in the diagram. 'The voltage across capacitor-C6 .has .increased by .92 volt.

If -we Aassume that the web next lags behind its proper position, the following sequence of events takes place.

(13) Web pulse coincides wit-h late gate.

(14) Thyratron VZ conducts.

(15) Relay vK6 is energized, switching t-he .movable contacts to the ma-ke posi-tion.

(.16) Contacts K6-1 start the interval timer centering about tube fV3.

(17) yContacts -Kt-Z energize advance position lin'- dicator `light 92 'and motor contacto'r K1.

(18) Contacts Kei-3 disconnect capacitor C8 rfrom 0 volt and connect it across storage capacitor C6, thereby decreasing the Voltage across C6 by .92 volt.

(19) Contacts K6-4 disconnect capacitor C4 ifrom +150 volts supply, and connectit across storage capacitor C5, thereby increasing the voltage across C5 by -.92 volt.

(20) The interval timer relay K7 .operates after the predetermined time to cut off plate current of thyratron V2, releasing relay K6, and restoring the quiescent conditions as outlined in steps 8 through 12 above.

The voltage across storage capacitor C6has decreased by .92 volt, making the control grid of thyratron V5 more negative by .92 volt. The voltage across storage capacitor C5 yhas increased b y .92 volt, making the control grid of thyratron V4 more positive by .92 volt.

We see that the result of conduction of thyratron-V2 upon storage capacitors C5 and C6 is the negative of the eiect of conduction of thyratronVl. Therefore, as long as thyratrons V1 and V2 conduct alternately, orina random sequence, such as would occur if the speed of the web feeding device is correct, the voltage-across storage capacitor C5 or C6 does not increase suiciently to cause either thyratron V4 or V5 to conduct.

1f, however, the speed of the feeding device isincorrect, the Voltage across either storage capacit-or YC5 or C6 will increase cumulatively and suiiciently to cause either thyratron V4 or V5 to conduct.

Let us assume that the speed is low. Then thyratron V2 will conduct on successive web pulses, relay K6 will operate successively; 'and the voltage across storage capacitor C5 will build up, increasing the control grid voltage of thyratron V4 until is conducts, thereby energizing relay K8..

-Relay K8 operates, switching the movable C Ontts Vis driven at about 1700 R. P. M. ham reversible drive with an output speed at shaft 56 of 'antenas .to the make position. Contacts K8-1 start an interval timer, consisting of tube V6 and associated circuit.

' Contacts K8-2 energize the increase speed correction motor contactor K4, and increase speed green light indicator 96.

After the time interval, determined by C9 and R4, e

will lenergize relay K9. This operates the timer circuitV of tube V6; the Vd ecrease speed motor contactor K3 and red indicator light 94. After an interval the relay K10 cuts off thyratron V5, discharges storage condense;- C6, and reconnects thyratron V to restore the initial conditions. V In this discussion so far the variable resistors R6 and R7 across the storage capacitors CS and C6, respectively, have been ignored. As described so far, the voltage across CS and C6 is proportional to the sum of the number of operations of thyratron V2 minus the sum ofthe number of operations of thyratron V However, since the rate rather than the number of operations of V2 and V1 is yproportional to the speed error, a leak resistor R6 is connected across storage capacitor C5, and a leak resistor R7 across storage capacitor C6, to establish a time constant. If the time between successive operations of thyratron V2 (or V1) is long compared to the time constant, the voltage across storage capacitors C5 and C6 will not build up, even if all corrections are-in the same direction. If the time between operations is comparable tothe time constant, the voltage across storage capacitors CS and C6 will build up at a time dependent on the speed error. Leak resistors R6 and R7 are variable to allow for Isetting the optimum time constant.

It will be noted that the motor circuits may be'closed by pushbutton switches shown at 110. This is for convenience in working on or adjusting the apparatus. Such switches may be provided at the panel box, or other' f desired control point.

'In a specific example of the invention the punch press 16 (Fig. 2) handles sheets in range of from 17" to 34 long. The change gear box 40 is a compound fourgear change gear box of known character. T hisemploys three shafts, two of which are stationary while the intermediate shaft is floating or movable, thus making possible many gear combinations. Changes are also possible though not ordinarily required in the chain drives 100 and 102. Themain shaft 30 is driven at about 450 R. P. M. The input shaft 52 of the variable speed drive The drive is a Graplus or minus 300 R. P. M. maximum. The motors 68 and 84 are Jannett reduction gear motors having an output speed of'about 36 R. P. 'M

e Referring now to Fig. 3, the tubesv V1, V2, V4 and V5 are #2051 thyratron tubes or equivalent. The tubes V3 and V6 are medium Mu triodes such as type 76 or equivalent. The relays K, K2, K3 land K4 are contactors suitable for the correction motors. The relays K5 and K6 are D. C. relays having a coil resistance of 11,000 ohms and having four single pole double throw contacts. The

11,000 ohms and having one normally closed contact. The relays K8 and K9 are D. C. relays having a coil resistance of 11,000 ohms and having two single pole double throw contacts. ".The relay K10 is a D. C. relay having a coil resistance of 11,000 ohms .and having one normally closed contact and two normally open contacts.

. relay K7 is aY D. C. relay having a coil resistance of f Thei'resistor R1 determines the on time for position correction and has avalue of 500,000 ohms. The resistor R2 determines the off time for position correction, and has a value of 500,000 ohms. Resistance R3 determines the number of cumulative corrections in the same direction which must take place in order to operate the speed correction motor 84, and has a value of 100,000 ohms. Resistance R4 determines the on time of the speed correcting motor 84 and has a value of 500,000 ohms. Resistance R5 determines the ofi time of the speed correcting motor 84 and has a value of 500,000 ohms. Resistances R6 and R7 determine the time constant of the speed correction, that is, the minimum time during which the predetermined number of cumulative corrections must take place inorder to operate the speed correcting motor, and have a value of 5 megohms. Resistors R8 and R9 are 10 megohms.

In the specific circuit shown condensers C1 and C1' have a value of 0.01 mfd.; condensers C2 a value of 0.25 mfd.; condensers C3, C4, C7 and C8 a value of 0.05 mfd.; and condensers C5 and C6 a value of 4 mfd. The resistors shunted around. the contacts. #l of relays K7 and K10 have a value of 10 megohms. Typical voltages are indicated directly on the drawing.. Variable resistor values are given at maximum.

VIt; will be understood that all of the foregoing quantitative values are given solely by way of illustration of one example of the invention, and are not intended to be in limitation of the invention.

It is believed that the construction and operation of our improved registering drive for a web, as well as the advantages thereof, will be apparent from the foregoing detailed description thereof. It will also be apparent that while we have shown and described our invention in ay preferred form, many changes may be made without departing from the scope of the invention, as sought to bev said main shaft and the output of said drive being con-A nected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the desired speed ratio between the first machine and the secondmachine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correcting register of the differential gear Vtype disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft ofthe position correcting register, and means to operate the said motor briefly at intervals.

2. Apparatus including a first machine and a second machine to be driven at different rotative speeds for workingV on a single'web fed from said iirst machine to said second machine, and mechanical drive means between said first machine and said second machine, said drive means including a wide range change gear box for readily yestablishing a positive ratio which is close to the desired speed ratio between the machines, a runningv register of the differential gear type between said change gear box and one of 4said machines, an infinitely variable drive, the input of said drive being connected toand driven by said change gear box and the output of said drive being' connected to the correction feed-in shaft of the running register to form a continuous correction' 7gdrive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of lthe infinitely variable ldrive is applicable to solely the small corrective component Aintroduced 4by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correction register, and circuit means to control said motor.

3. Apparatus including a punch press and a metering feed unit for feeding a single web to the punch press, and mechanical drive means between said feed unit and said punch press, said drive means including a wide range change 'gear box for readily establishing a positive ratio whichv'is either exactly Vor very close to the desired speed ratio between the feed unit and punch press, a running register of the differential gear type between said change gearbox and one'rof the machines, an infinitely variable and reversible drive, the input of said drive being connected to said change gear box and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the feed unit and the punch press, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible electric motor connected to the correctionfeed-in shaft of the position correction register, and circuit means to lcontrol said motor.

y 4. Apparatus including a first machine and a second machine to operate on a web having register markers, a mainV drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type rbetween said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction yfeed-in shaft of the running register to form a continuous correction drive system, saidinnitely variable drive being adjusted to obtain the exact desired speed ratio between the rst machine and the second machine, the arrangement being such thatany drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear .type disposed in the correctiondnve system, a reversible electric motor connected to the correction feed-in shaft of the position correcting register, and means to operate the said motor briey at intervals, said means including a detector system cooperating with the register markers on' the web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electricmotor'in that direction which `tends to restore registration.

5. Apparatus including a rst machine and a second machine to be driven at different rotative speeds to operate on a single web having register markers, a wide range ,change gear box for readily establishing a positive ratio which is very close to the desired speed ratio between the machines, one end of said change gear box being connected to one of said machines a running register of the .differential gear type between the other end of said change gear box and the other of said machines, an infinitely variable drive, the input of said drive being connected to and in drive with said change gear box and the outp-ut of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable `drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the linfinitely variable drive is applicable to solely the small corrective lcomponent introduced by the running register, a

position correction register' of the differential lgear ztyp disposed in the'correc'tjtion drive vsyst'enr,Aa`i'eve1 sib le electricmotor connected to the correction feed-in shaftpf the position correction register,v Aand means VAto operate the fsaid motor-briefly at intervals, vsaid means inclirding a detector Ysystem cooperating with the register mar'keis on the web for detecting deviation from true register and for supplying corrective increments of electric'powerto drive the electric motor in that direction which tends Vto restore registration.

6. Apparatus including la first machine nand la second machine to be driven at different rotative speeds tovoprerate on `a vsingle web having register markers, `a Ywide range change gear box for readily `establishing a positive ratio which iseither exactly .or very close to theV desired speed ratio between the machines, one end of Isaid change gear box being connected to one of said vmachines a running register of the differential gear type betweenthe other endfof .said change gear Vboxand the other of said machines, an infinitely variable andrreversible drive, the input of said drive being connected toand in drivewith said change gear 4boxand the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exatpdesired speed ratio between the -irst machine and the second machine, the arrangement being such .that any drift ofthe intinitely variable drive is applicableto solely the small corrective component introduced by the running register, a position correction register of .the differential gear type disposed in the correction drive system a reversible electric motor connected to .thecorrection feedein shaft of the position correction register, andmeans to operate the said motor briefly at intervals, said means including adetector system cooperating with the register markers on the web forl detecting deviation from true register and for supplying corrective increments 0f electric power to drive the electric motor in that direction which tends to restore registration, said increments also being supplied to differently colored lamps or equivalent signals for the information of an operator who may change the adjustment of the infinitely variable drive.

7. Apparatus includinga punch press, a metering feed unit for feeding a printed web having a register `marker to said punch press a wide range change gear box for readily establishing a positive ratio which is close to the desired speed ratio between'th'e feed unit and the punch press, one end of said change gear box being `cortnected to one of said machines a running register of the differential gear type between the other end of said change. gear box and the other of said machines, an ininitely variable drive, the input of said drive beingrconnecte'd to said change gear box and the output of said drive being connected to the correction feed-in shaft ofthe running register Vto forma continuous correctiondrive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio betweenthe feed unit and the punch press, thearrangement being such that any drift of the infinitelyvariable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive systema reversible electric motor connected to the `correction feed-in shaft of the position register, and means to operate the said motor briefly `at intervals, said means including an electric eye and phase detector system cooperating with the register markers on the printed web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends `to restore registration.

8. Apparatus including a punchpress, a metering feed unit for feeding a printed '.webwhaving a register `marker t to said punch press ,a wide range change .gear box for.

t 11 a positive ratio which is either exactly or close to the desired speed ratio between the feed unit andthe punch press, one end of said change gear box being connected to one of said machines a running register of the differential gear type between the other end of said change gear box and the other of said machines, an infinitely variable and Vreversible drive, the input of said drive being connected to said change gear box and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the feed unit and the punch press, the arrangement being such'that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a 'reversible electric motor connected to the corL rection feed-in shaft of the position register, and means to operate the said motor briefiy at intervals, said means including an eiectric eye and phase detector system co'- operating with the register markers on the printed web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends to restore registration, said increments also being supplied to differently colored lamps or equivalent signals for the informa-tV tion of an operator who may change the adjustment of the infinitely variabledrive.

9. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between `the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive of the positive type, the input of said drive'being connected to and driven by said main shaft, and the output of said drive being connected to `the correction feed-in shaft of the running register to form a continuous correction drive system, said innnitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift yof the infinitely'variable drive is applicable to solely the small corrective component introduced by the running register, a detector system cooperating with the register markers on `the web .for detecting deviation from true register and for supplying corrective increments of electric power, a reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of corrective increments in one direction to operate said ratio adjusting motor in appropriate direction.

l0. Apparatus including a first machine and a second machine to operate on a web having register markers, aV main drive shaft for establishing :a positive speed ratio between the machines, a running register of the differed tial gear type between said main shaft `and one of said machines, an infinitely variable drive of the positive type, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaftrof the running register Vto form a continuous correction drive system, said infinitely variable drive being adjusted toobtain the exact desired speed ratio between the -first machine and the second machine, thearrangement being suchv that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a detector system cooperating with the reg- Yister markers on the web for detecting deviation from truc register and for supplying corrective increments of electric power, aY reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive,` means responsive to ancumulative series of corrective Vincrements in one direction to operate said ratio adjusting motor in appropriate direction, and means whereby corfaii'y establishing Y rective increments in one dlrection cancel correctiveincrements in opposite direction.

l1. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive of the positive type, the input of said drive being connected to and driven by said main shaft, 4and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the run=A ning register, a detector system cooperating with thereg ister markers on the web for detecting deviation from true register and for supplying corrective increments of electric power, a reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of corrective increments in one direction to operate said ratio adjustingy motor in appropriate direction, and means whereby ay series of increments is made ineffective to operate the ratio `adjusting motor if said series does not take place within a predetermined time.

l2. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speedratio etween the machines, a running register of the differential gear type between said m-ain shaft and one of said machines, an infinitely variable drive of the positive type, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being 4adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, aV detector system cooperating with the register markers on the web `for detecting deviation from true register and for supplying corrective increments of electric power, a reversible electric motor arranged to adjust Vthe speed ratio of the infinitely variable drive, means responsive to a cumulative series of corrective in crements in one direction to operate said ratio adjusting motor'in appropriate direction, means whereby corrective increments in one direction cancel corrective increments in opposite direction, .and means whereby a series Vof increments is made ineffective to operate the ratio adjusting motor if said series does not take place within a predetermined time.

13. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and theoutput of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being Aadjusted to obtain the exact desired speed ratio between the first machine and the second ma chine, Vthe arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective Yincrements of electric power, a

reversible electric motor arranged to adjust the speed' ratio of the infinitely variable drive, means responsive to a cumulative series of corrective increment-s in one direction to operate said ratio adjusting motor in appropriate direction, and means whereby a series of increments is made ineffective to operate the ratio adjusting motor if said series does not take place within a predetermined time, said last means comprising a large storage capacitor, a small charging capacitor for charging into the storage capacitor, a tube made conductive when the charge on the storage capacitor reaches a predetermined value, and a resistor shunting the storage capacitor to establish a time constant.

14. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connec-ted to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correcting register, and means to operate the said motor briefly-at intervals, said means including a detector system cooperating with the register marliers on the web for :detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in thatV direction which tends to correct position, a second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction.

15. Apparatus including a first machine and a second machine to operate on a web having register markers, a main Vdrive shaft for establishing a positive speed ratio between the machines, a running register of the difierential gear type between said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaft of the running register to form a kcontinuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by 'the running register, a position correction register of the .differential gear type disposed in the `correction drive system, a reversible electric motor connected to the correction feed-in shaft yof the position correcting -register, and means to operate the said motor Abriefly at intervals, said means including a detector :system ycooperating with the register markers on the web for detecting deviation from true register and for supplying Vcorrective increments of electric power to drive the electric motor in that direction which tends to correct position, Va second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction, and means whereby position corrections in one direction cancel position corrections in opposite direction.

16. ,Apparatus including aiirst machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a `positive speed ratio 14 between the machines, a running register of the differential gear type between said main shaft and one of ,s ail machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and the output of said ldrive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the dierential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correcting register, and means to operate the said motor` briefly at intervals, said means including a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends to correct position, a second reversible electric motor arranged ,to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction, and means whereby a series of position corrections even if in the saine direction is made inffective to operate the ratio adjusting motor if said series does not take place within a predetermined time.

17. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaft of the ruiming register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correcting register, and means to operate the said motor briefiy at intervals, said means including a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends to correct position, a second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction, means whereby position corrections in one direction cancel position corrections in opposite direction, and means whereby a series of position corrections even if in the same direction is made ineffective to operate the ratio adjusting motor if said series does not take place within a predetermined time.

18. Apparatus including a first machine and a second machine to operate on a web having register markers, a main drive shaft for establishing a positive speed ratio between the machines, a running register of the differential gear type between said main shaft and one of said machines, an infinitely variable drive, the input of said drive being connected to and driven by said main shaft, and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible elec- Vtric motor connected to the correction feed-in shaft of the position correcting register, and means to operate the said motor briey at intervals, said means including a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends to correct position, a second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction, and means whereby a series of position corrections is made ineffective to operate the ratio adjusting motor if said series does not take place within a predetermined time, said last means comprising a large storage capacitor, a small charging capacitor for charging increments of current into the storage capacitor, a tube made conductive when the charge on the storage capacitor reaches a predetermined value, and a resistor shunting the storage capacitor to establish a time constant.

19. Apparatus including a first machine and a second machine to be driven at different rotative speeds to operate on a single web having register markers, a wide range change gear box for readily establishing a positive ratio which is very close to the desired speed ratio between the machines, one end of said change gear box being connected to one of said machines a running register of the differential gear type between the other end of said change gear box and the other of said machines, ank infinitely variable drive, the input of said drive being connected to and in drive with said change gear box and the output of saidvdrive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the iirst machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective incrementsof electric power, a reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of corrective increments in one direction to operate said ratio adjusting-motor in appropriate direction. l

2t). Apparatus including a first machine and a second machine to be driven at different rotative speeds to op-v erate on a single web having register markers, a wide range change gear box for readily establishing a positive ratio which is very close to the desired speed ratio between the machines, one end of said change gear box being connected to one of said machines a ruiming register of the differential gear type between the other end of said change gear box and the other 'of said machines, and infinitely variable drive, the input of said drive being connected to and in drive with said change gear box and the output of said drive being connected'to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a detector system cooperating with the register markers on Athe web for detecting deviation from true register and 1e for supplying corrective increments of electric power, a reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of corrective increments in one direction to operate said ratio adjusting vmotor in appropriate direction, means whereby position corrections in one direction cancel position corrections in opposite direction, and means whereby a series of position corrections even if in the same direction is made ineffective to operate the ratio adjusting motor if said series does not taire place within a predetermined time.

2l. Apparatus including a firstV machine and a second machine to be driven at different rotative speeds to operate on a single web having register markers, a wide range change gear box for readily establishing a positive ratio which is very close to the desired speed ratio between the machines, one end of said change gear box being connected to one of said machines, a running register of the differential gear type between the other end of said change gear box and the other of said machines, an

Vinfinitely variable drive, the input of said drive being connected to and in drive with said change gear box and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said infinitely variable drive being adjusted to obtain the exact desired speed ratio between the rst machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicable to solely the small corrective component introduced by the running register, a position correction register of the dierential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correction register, means to operate the said motor brief- V1y at intervals, said means including a detector system cooperating with the register markers on the web for detecting deviation from true register and for supplying corrective increments of electric power to drive the electric motor in that direction which tends to correct position, a second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive, means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction.

22. Apparatus including a first machine and asecond machine to be driven at different rotative'speeds to opcrate on a single web having register markers, a wide range gear box for readily establishing a positive ratio whichV is very close to the desired speed ratio between the machines, one end of said change gear box being connected to one of said machines, a running register of the differential gear type between the other end of said change gear box and the other of said machines, an infinitely variable drive, the input of said drive being connected to and in drive with said change gear box and the output of said drive being connected to the correction feed-in shaft of the running register to form a continuous correction drive system, said iniintely variable drive being adjusted to obtain the exact desired speed ratio between the first machine and the second machine, the arrangement being such that any drift of the infinitely variable drive is applicableV to solely the small corrective component introduced by the running register, a position correction register of the differential gear type disposed in the correction drive system, a reversible electric motor connected to the correction feed-in shaft of the position correcting register, means to operate the said motor briefly at intervals,'said means including a detector system cooperating with theV register markers on the web for detectingtdeviation from true register and for supplying corrective t increments of electric power to drive the electric motor in that direction which tends to correct position, a second reversible electric motor arranged to adjust the speed ratio of the infinitely variable drive,

17 means responsive to a cumulative series of position corrections in one direction to operate said ratio adjusting motor in appropriate direction, means whereby position corrections in one direction cancel position corrections in opposite direction, and means whereby a series of position corrections even if in the same direction is made ineffective to operate the ratio adjusting motor if said series does not take place within a predetermined time.

References Cited in the le of this patent UNITED STATES PATENTS 2,057,295 Engel Oct. 13, 1936 18 Logan June 1, 1937 Rue et al. Mar. 1, 1938 Coy Nov. 9, 1943 Sorkin May 16, 1944 Bailey et al. Mar. 14, 1950 Kelling et a1 Nov. 7, 1950 Auer Apr. 10, 1951 McKenney et al Sept. 2, 1952 Fay Feb. 17, 1953 Claif et al Apr. 26, 1955

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