US1115586A - Rewinding device. - Google Patents

Description

W. R. SCHWAB.

REWINDING DEVICE.

APYLIGATION EI'LED JAN. s. im.

1,115,586, Patented N0v.3,1914.

W. R. SCHWAB?. REWNDING'DEVIGE.

APPLIGATION 111m 111116, 1913,

Patented N013, 1914.'

3 SHEETS-SHEET Lil 15,5%@2 l,

a L 43M W. R. SCHWAB.

BEWINDING DEVICE. APPLICATION -ILBD J1\.N.G,1913.

Patented Nov. 3, 1914.

` useful Improvements in Rewindin of'wliich the following is a ,speci arias nain.

n s cnzwiin, or minsaslcirr, Missouri, assienoii fro @nu cannniiennrii "Goairaivm or Kansas cifra, niissonnr, `.a conronari'on or an'izoiia.

,nnwiniiine nnvrcn.

specication ofietteis Patent.

Patented new. a, i914.

Application filed January 6, 1913. Serial No. 7li ,503.

` 'To allwiom 'it may concern:

i Be it known that I, WiLLiAM ld.. SCHWAB,

a citizen of the United States, residing at Kansas City, in the'county'of Jackson and State vof Missouri, have invented new and Devices, cation. This invention relates to improvements in apparatus Vfor feeding or otherwise han dli'ngstrips or webs of paper or other ma' terialsr from a source of supply such for i example as a roll, and thel primary object of the invention is to provide a device for controlling the backward movement or rewind 'of the stripor web whereby the forward -edge thereof may be easily and quickly returned to a predetermined point after hay ing beenl advanced'beyond suoli point.

yWhile the invention is' applicable generally to the uses above stated, it is especially a lplicable to the paper-feeding mechanism olf3 a photographic machine, such for exam le as, that disclosed in my prior appli cation, Serial No. 662,478 filed November 25, 1911, the rewinding device enabling the strip or web to be quickly and easily returned to a point where its forward, edge just projects through the feeding rollers irrespective of the length of paper that has been fed-by these rollers, within a certain limit, thereby enabling the machine to be opened to erniit access to the interior thereof and also enabling the roll-holding receptacle to be removed without wasting the sensitized paper by exposure, as well as avoiding un- 'i threading of the strip or web relatively to the rollers or devices which guide and feed- ,the same within the machine.

' To these and other ends, the 'invention consists incertain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly yin the claims at the end of the specificatioii. i

In the,accompanying drawings: Fisgure 1 represents a vertical section of a rewinding device embodying the present invention, the parts being shown in the position which they occupy normally while the strip or web is being fed forward or advanced. Fig. 2 is aV view similar to Fig. l but showing the in t e relative positions which they occupy striplor web iewound, 'and showing the parte.

. theopposite ,w

adapted to 'coperate with the guides and to 3 shows the rewinding device as viewed from the right in Fig. l, with the rear wall 4o f the casing removed; Fig.` l is a perspec tive view showing the controlling cani and g the adjustable stop; Figs, 5 and 6 are detail perspective views of the elements of a fric tion clutch winch serve todi-ive the cani;

Fig. Z is a detail sectional view of the handle or knob which serves' to turn the roll in a backward direction to rewind the strip or web.

Similar parts are designated by the same reference characters in the several views. I' While this invention may be used in vaf rions instances where it is desirable or necessary to rewind a strip or web so that its i forward edge may be returned to a predetermined point after being advanced different distances, tlie invention in the present embodiment thereofis shown in connection with the paper-feeding mechanism of the type used on photographic exposing and developing machines. This embodiment of the invention, however, is to be understood as an. example thereof, as equivalent constructions may be devised by those skilled in the art which will embody the. principles of the invention and will be included within the scope of the clai specialisation.

In the present instance, l designates the ins at the end of the l upper portion of the casing of a machine of lthetype, forexample, of those used for eX- posing successive sections or portions of a strip or web of photographic material for the purpose of making reproductions', the j space 2 representing, for example, the vertifcal dimension vof the optical field. The 1strip or web 8 of sensitized material is ad-` vanced to bring sections thereof' successively into the optical field by coperating feed rollers 4 betweenv which the strip oi' web passes. The stripor web in the presvent instance is wound into a roll 5 and the roll is adapted to be inserted within and closed by a receptacle or casing 6. The roll is preferably wound on a spool which has flanges 7 at the ends and journals 8, the latter serving to revolubly support the spool.- In order to facilitate insertion and removal of the spool relativelyV to the cas#v ing, the latter is provided in the present. instance with uides 9 which are Xed to a isI thereof, and slides i() are inl-i115;

also cooperate with the journals 8 of the spool and thereby support the latter revolubly Within the casing. One of the journals 4 S of the spool is provided with a clutch jaw 5 ll which provides means for rotating the spool backwardly and thereby revv'inding the strip or web thereon. A rewinding handle or knob is provided. whereby the spool may be rotated in a baclsiward direction to re lo Wind the strip or web, and preferably, this reivinding handle knob is disconnected lroin the spool. ln the present instance, a knob or handle l2 is provided which is arranged exteriorly of the receptacle casing 6, this hnob or handle being fixed to a square or angular shaft 13 and this shaft 13 passes through the hub id of a ratchet- Wheel 15. rlhe ratchet Wheel l5 is located inte riorly or" the casing and its sleeve-like hub le is journaled to revolve in a bearing ld which is fixed to the adjacent Wall of the casing7 and the shaft 13T which is xed to the handle 112 is connected-to revolve with the ratchet wheel l5 although it is capable of 2.5 axial movement through the hub thereo'l'I whereby the clutch jaw 1T `lforined on the inner end oi' the shaft i3 may be caused to engage and disei'igage relatively to the clutch ll on the respective journal of the spool. Normally, however, the shaft 13 is held in retracted position so that it will be disconnected from the spool, and for this purpose a compression spring 1S may be interposed between the handle or knob 12 and a collar 19 attached to the hub of the ratchet Wheel. The strip or Web 3 preferably cooperates with a pair of guiding and tensioning rollers 2O and 21 which are interposed betiveen the spool'and the feed rollers Llo ll, the roller 20in thepresent instance being journaled in a bracket which projects into the casing 6 from a ypanel 23 Which is removably fitted to the'ront of the casing to permit insertion and removal of the paper rolls, and this panel may be retained in closed position by a lock or equivalent device 2i. The roller 2l is preferably'journaled directly in the casing 6 and adjacent to an aperture 25 in the bottom of the cas- 5o ing through which the strip or web passes on its way to the machine wherein theY paper is to be used.

Ordinarily, the strip or Web is fed by the rollers i intermittently so as to bring portions or sections thereof successively into the optical iield, the spool being free to rotate and thus supply-the paper from the roll theneon. Alt is desirable or necessary, however, to occasionally open the machine to obtain access to the interior thereof and to also remove a casing or. receptacle containing paper of one width and to substitute a casing containing paper of a ditterent width. In each of these instances, there o5 would bc a loss of paperequivalent to the 4the screw extends.

asing,

'this smooth side of the cam,

length thereoli which had been i'ed beyond the rollers -i, and where the machine Was be ing operated to expose sections of the paper equivalent to the vertical dimension of the optical held, the loss of paper occasioned in` that way Would be equivalent to -the area.- l

of the optical field. The present invention provides means for automatically control-I ling the rewinding of the str1p or web upon Aembcalies a panl which is adapted to cooperate with the ratchet wheel l5, this pawl being pivoted within the casing 6 at 27 and is provided with a projection 28 Which is arranged to coperatie with a cam 29, the projection 28 being retained in coperative relation with the cani by a spring 3() Which acts on the pawl 26. The cani 29 is formed with a depression 3l which, when the strip or web has been rewound to a predetermined point, will receive the projection 28 on the paivl 26 and thereby permit the latter to move into engagement with the ratchet Wheel l5 and thereby lock the reivinding 'handle or knob l2, a concentric portion 32 ou the cam forming a surface on which the j projection 28 .may ride, thereby holding the I pawl 2G in disengaged relation to the ratchet I Wheel, and a stop is provided which is adapted to be engaged by the projection 28 von the pawl whereby rotation of the cam in l a forward direction is arrested. This stop 33 is adjustable in a direction circumferentially of the cam whereby the revvinding de` vice may be set to rewind different lengths of the strip or web, the length of the strip or web to be rewound being usually determined by the vertical dimension of the optical field. In the present instance, the periphery of the cam is provided ivith threaded holes 3i which are suitably spaced circuinferentially thereof, and any one of these holes may receive a screw 35 which serves'to vsecure the stop tothe cam. ln order to provide for adjustments orn the stop 33 intervmediate of those a'orded by the holes 34, the stop may be provided with a. circumferentially extending slot 36 through which The cam 29 is loosely mounted on a shaft 37, this shaft being journaled at one end in a bearing 38 Which is securedfto one of the side Walls of the and the opposite end of the shaft is journaled inV a bracket 39 which latter is fixed Within the casing'. The inner side of the cam 29 is smoothed to provide one mem- `ber of a friction clutch, the other member el() of the friction clutch bein opposed to and a disk 41 ci' suitable friction material is interposed between the cam and the member 40. The member 40 of the` clutch is mounted to turn with the shaft 3?, although it is capable of axial movement with respect thereto. In the construction shown, the hub 42 of the .clutch member ll() has a square or angular opening which forms a spline connection withthe squared hub e3 of a disk 4M, the latter being xed to the shaft 3? by a setserewe or equivalent means. A compression spring 46 is interposed between the` movable clutch member l and the relatively fixed disk 44, and its expansive tendency serves to press the clutchl member and the friction material el against the earn 29 with snticient forceA to turn the latter until the stop 33 thereon is. brought against -the projection 28 on the -pawl, whereupon further rotation of the shaft 3C may occur, although the Lean?, will remain stationary.

The shaft 3"? and consequently the cam are rotated at a rate which is directly proportional to the rate of movement of the strip or web while the7 same is being moved either in a forward or a backward direction, and the present invention prov1des means for accomplishing this movement of the shaft 37 and the earn irrespective of the diminishing diameter of the roll due to the unwinding of the paper therefrom. ln the construction shown, a wheel 4f? is employed which bears against the'periphery of the roll and has a rolling contact therewith, thel wheel being preferably provided with a tire of rubber or other suitable material that will allord the necessary degree of friction to avoid 'felipev y Tins wheel 1s mounted on a shaft t8V which latter is gournaled in a swinging arm4 page.

Li9 whereby the wheel will remeing in rolling engagement with the periphery oi' the 'aper roll irrespective of the diameter thereo and a euitable springserves to yieldably press the wheel against the periphery or' the roll. M'otion is communicated from the wheel d? to the shaft 37 by a bevel gear l which is fixed to the wheel Ll? and cooperates with e bevel gear 52 fixed to a shaft 553, the lattenbeing journaled at its endsin the swinging arm 49 and has a bevel'gear 54- xedthereto which cooperates with a bevel gear o5, the latter being fixed tov the'oheft?. Asthe arm 49 swings about the shaft 37 'as an axis, the driving connection between the'wheel-e and the shaft 37 will be maintained irrespeo tive'of the position occupied by the swinging arm. a

Fig. 1 shows the relation `of the parte while the strip or ,web is beingadvanced orr Gotha 00.11129 until a length of paper has been 1 fed in a forward direction, the wheel 41!` be ing then rotated in thel direction indicated by the arrow and tending to rotate the cani -29 in*thekdirectionindicated by the arrow.

The advance of the strip or web 'will rotate.

the-feeding and guiding rollers.

reverse in Fig. l. When, however, it is desired to rewind the strip or web, it is only necessary to push the knob or handle l2 inwardly so as to engage the clutch jaw 17 thereon with the clutch jaw ll on the spool, and to turn the knob or handle to the right, the rewinding knob or handle being then connected to the spool, and as the 4pawl 25 is disengaged from the ratchet wheel l5, the spool may be turned backwardly to'rewind the strip or web.

Thisrewinding operation may continue until the projection v28 on the pawl has reached and entered the depression 3l in the cam, whereupon the pawl26 will be moved by its spring into locking engagement with I' the ratchet wheel 15- and thereby prevent further rotation 'of the spool in a backward direction. By setting the stop 33, on the cam in such va position that the circumferential distance between it and the depression 31 is proportionate to the distance the strip or 'web isadvanced at each operation, the controllingE device will enable the strip" or web to be rewound to a4 predetermined point irrespective of whether the 'strip has been advanced' a distance 'equal to" the total dimension ofthe ocptical field or any intermediate distance, an

the automatic lookin of the spool ,whenthis point has been reac ed prewhich would causait to be lnnthreaded from I claim 'as :my invention A l. The combination of means for; feeding tion, and meanscontrolled by the moveimentof-thestripto automatically arrest the lm'ernent of the strip at'a'predeter.-

mined pi i.. i

2; Thel combination of means for advancing` a. strip oit' material, ineens' for vmoving said stripina backwarddirection to rewind the same,andineens controlled bythe advancing movement of the strip for arresting the backward movement 4thereof after, a

wound.

3. The 'combination of rollers` having mea-ns for operating them to feed astrip ofmaterial between thena,.n1eans fortinovingl measured length of the strip has been re j "vents ,continued rewinding of the strip a strip of'material in one direction, means 'tor moving saidfrvstrip 1n a reverse direethe strip 'baelrw'erdl and means cooperaA ytive.;, withjtlne strin`tc arresttbe backward movement of the strip automatically after :t measured length thereof lies been moved backwardly between the feeding rollers to prevent Withdrawal of the strip from between the feeding rollers.

' i. The combination of means 'for unwinding e strip from e roll, means for rewinding the strip thereon, and measuring' ineens adapted to coperate with the periphery of the roll and operative to nutonniticellylimit the rewinding movement thereof.

5. The combination of means for unwinding and feeding e strip freine rolli ineens for turning the roll to rewind the strip l5 thereon, :L locking device ope ative to prevent rewinding movement of the roll, end n measuring` wheel cooperative with the strip to control the locking device.

6. The combination oi n'ienns for feeding` `2O n stripfroni n roll, menne for rewinding the strip on the roll, ey locking` device operative to prevent rewinding movement of the roll, and means governed. by the movement of the strip for rendering the lookin device inoperative until the strip has been rewonnd to n predetermined point.

7. The combination ot menne for feeding a strip from n roil, means for revvinding the strip on the roll, n locking device operutive to prevent reivinding movement of the rollj und ineens embodying n Wheel lieving n rolling` eng-gement with the periphery of the roll for controlling the locking device.

8. The combination of menne for feeding :i strip from roll7 means .tor rewindingthe strip on the roll, a locking device operative to prevent rewinding movement oi the roll, and ineens embodying i Wheel hav 40 ing n rolling engagement with the periphery of the roll, and n cznn operative by seid vflieel for automatically arresting the re- Winding moven'xent of the roll ut :i predeter lmined point. i

9. The combination of means for 'feeding` n strip from eroll, menne for rewinding the strip on the roll, n locking device operative to prevent `ievvinding movement of the roll, and means embodying e cein'co operative with the locking' device, :md ineens governed by thle rewinding move ment of the strip for actuating seid ceinf 10. The combination of .ineens for feeding e strip from a roll menne for ren'inding the strip on the roll, a, locking device operative'to prevent revvindin'g nioveient oi y roll, and ineens embodying e cem cooperative 'with tno. locking device, nnd ineens governed by the rewinding moveen` cani. v

ll. rihe combination of menne' for feeding n Strip from n roll, means for reivinding the strip on the roll, a, locking device operative to prevent rewinding' movement of the roll, and means embodying n Wheel having a rolling engagement with the periphery of the roll and jvieldnbly held in Contact therewith for renderingl the locking device inoperative until the strip has been revvound to n predetermined point.

The combination of menne: for feeding e Strip from a roll, ine-ans for rewinding the strip on the roll, n locking device operative to prevent rewinding movement of the roll, and ineens embodying n cam having menne for moving it at e rute proportional to the movement of the strip and .cooperative With the locking dev ice to hold the saine in in-1 oper tive condition nntii the strip has been rewonnd to n. predetermined point.

lf3. The combination of Ineens forv feeding n strip from n roll, ineens for revvinding the strip on the roli, e locking device operative to prevent rewinding moven'ient of the roll, :ind menne einoodyingg n cum having ineens 'for moving it et n rete proportional to the "movement of the strip find eoperntive with the leclting device to hold the sinne in n opera e condition until the strip has been rewonnd to n predetermined point, ind 'iin adjustable stopon the cem for setting the sume to permit rewinding varying lengths oi' the strip.

lli. The combination et means for feeding strip from nl roll, means for revvindingthe strip on the roll,l e locking device operative -to prevent re'winding movement of the rol und means ier controlling the locking dev vice embodying e cem coperetive with the locking device, a Wheel having a rolling engagement With the periphery of the noli,

und n friction clutch `iormng an operative ine-n: of the strip for frictionnlly driving ion connection betweenglsaid ,Wheel and clutch.`

in testimonyv wlieieo I nave hereuntofset my hand in presence oi twoenioseriloing Win messes.

' vvinnninn Sonnen; 1

Witnesses L. Penne,

Images