Патент USA US2128868код для вставки
Aug. 30, 1938.V F. E. WELLER v " 2,128,868- - WEB FEEDING' MEGHANISM Original Filed oct. 6, 1952 I || I l “HHM L fzzz " zgn 4 sheets-sheet 1 "mmm ' - Í vzz` _ z2 M m llullmu _ n : "HU w .|| » I u A i. MTAS r INVENTOR ATTORN EYó’ ‘ ' Aug. 30, 1938. F. E. WELLER 2,128,868 WEB FEEDING MECHANISM Original Filed Oct. 6, 1932 4 Sheets-Sheet 2 ` lNvENToR BYFranlc l'lm’ller 05ML v ATToR sfuma Evs Aug. 30, 1938. F. E. WELLER 42,128,868 WEB FEEDING MECHANISM Original Filed Oct. 6, 1932 4 Sheets-Sheet 3 È INVENTOR BY Frank EÍWeller W, M »- NM1. ATTORNEYJ’ Allg. 30, 19-38. F, WELLER 2,128,868 WEB FEEDING MECHANI SM Original Filed Oct. 6, 1932 4 Sheets-Sheet 4 ATTORN YJ y Patented Aug. 30, 193% ' 2,128,863 UNITED STATES PATENT oFFlcE 2,128,868 y WEB FEEDING MEcnANrsM Frank E. Weller, Bloomfield, N. J., assigner to Trans-Lux Corporation, a. corporation of Del aware Original application October 6, 1932, Serial No. 636,490. Divided and this application October 26, 1934, Serial No. 750,079. Renewed January 17, 1938 6 Claims. (Cl. 813-24) Fig. 10 is an elevational view, partly in sec My invention relates to mechanism for feed ing or drawing a printed web through a projec tion field. In an important respect, my invention relates 5 to a combined web-feeding and -tensioning ar rangement for feeding the web through a pro jection field while maintaining the same taut and plane to insure highly satisfactory image pro jection. 10 l5 ` My invention has further reference to novel features and characteristics of mechanism of tion, and is taken on the line I0--I0 of Fig. 9; Fig. l1 is a vertical sectional view, partly in elevation, illustrating a modification of the in vention; Fig. 12 is a plan view, partly in section, of a part of the mechanism shown in Fig. 11; and Fig. 13 is a vertical sectional- view, partlyl in elevation, illustrating an arrangement for pass ing convection heat currents into contact with a 10 section of the printed web. ì In general, my invention relates to a combined the character stated whereby said mechanism may be efficiently and satisfactorily operated by printing device and projector, said device p_rint aperson of little skill. ing news items on a web which is moved through ' Various other objects, advantages and char acteristics of my invention will become apparent the projector to project images of the printed 15 characters on a display screen. Although com from the following detailed description taken in bined devices of this general character are well y known in >the art, my invention is important be connection with the accompanying drawings. My invention resides in the feeding mecha 2i) nism, arrangements and features of the charac ter hereinafter described and claimed. Y This application is a division of my pending application Serial No. 636,490, filed October 6, 1932.4 » \ For an understanding of my invention and for an illustration of some of the forms thereof, reference is to be had to the accompanying draw ings, in which: Figure 1 is a side elevational view of mecha nism as constructed in accordance with my in vention; . ' Fig, 2 is a side elevational View of the mech anism of Fig. 1 but with various parts in different _ positions; Fig. 3 is an enlarged vertical sectional view, partly in elevation, of mechanism as constructed in accordance with my invention; Fig. 4 is a perspective view of a part of the mechanism shown in Fig. 3; 40 Fig. 5 is a plan view, with parts omitted, of a part of the mechanism shown in Fig. 3; Fig. 6 is an elevational view, partly in sec tion„and is taken approximately on the line 4,. 6--6 of Fig. 3 looking in the direction of the ar rows; I Fig. 7 is an elevational view, partly in section, and is taken approximately on the line 1-1 of Fig. 3 looking in the direction of the arrows; 50 Fig. 7a is a sectional view, partly in pian, o1' a part of the web-tensioning mechanism; Fig. 8 is an elevational view illustrating a mod'ñcation of the invention; Fi . 9 is a plan view of a part of the mecha 55 nism shown in Fig. 8: cause involving novel features contributing great ly to improved projection and simpliñcation of 20 operation. I For a detailed description of my invention, reference is to be first had to Figs. 1 and `2, wherein C represents any suitable cabinet or housing having, as herein shown, a detachable or movable door d. Disposed within the cabinet C isra projector P and a printing device D, the latter being movable to the exterior of the cabi net C as hereinafter more particularly described. As more fully described in U. S. Letters Pat ent No. 2,018,691, granted October 29, 1935, I represents a base or support which may be suit ably- secured to the vbottom wall .of the cabi net C. Rotatably mounted on the base I is a turntable 2 which may carry a pivoted latch 3 35 coactable with a notch in the base I for retain ing the parts in the normal position shown in Fig. 1, the latch 3 being releasable, however, so that the turntable 2 may be rotated through an 40 angle of 180 degrees into the position shown in Fig. 2. . Upstanding from the turntable 2 is -a standard 4 on which the aforesaid projector P is supported ' in any suitable manner. Pivoted to opposite sides of the turntable 2 are the lower ends of two pairs of legs 5, 5 and 6, 6, the upper ends of which are pivoted to a table 1. The latter carries a pair of spring-controlled latches 8, 8 which coact, respectively, with latch ing members 9, 9 carried by the standard 4. As clearly appears, the latches 8, 8 serve to retain the aforesaid pairs of legs in vertical position, Fig. 1, and, when said latches are released, said pairs of legs may be moved to inclined position 45 2 2,128,868 as shown in Fig. >2 to the extent permitted by one or more chains I0, or equivalent. The printing device D, in the example herein shown, is of the type known to the art as a Dow Jones printer. The printing mechanism proper is detachablyretained on the table 'I by a frame plate II secured in suitable manner to said table l. Depending from the table ‘I is a housing I2 for the motor and other operating parts of the 10 printing. mechanism. ' As well understood in the art, the printing de vice D comprises spaced, upstanding plates in which is journaled a horizontal shaft I3, Fig. 3, carrying a type wheel I4 having characters dis 15 tributed around the periphery thereof. The wheel I4 is freely slidable along the shaft I3 but is keyed thereto for rotatable movement there with. Coactable with the type wheel I4 is‘an inking roller I5 to which ink is fed by a roller I6, 20 ink being supplied to the roller I6 in suitable manner as well understood in the art. 'I'he roll ers I5 and I6 are supported on a suitable frame I'I slidable on a rod I8 and with which the type wheel I4 together with said rollers I5 and I6 are plurality of spaced rollers 32 are mounted for ro tatable movement therewith. As shown particu larly in Fig. 5, it is desirable that each of the rollers 32 be provided with peripheral rows of corrugations along the respective opposite sides thereof, these rows of corrugations being sepa rated by a channel disposed centrally thereof. Depending from the aforesaid bottom wall 23 are a plurality of spaced ears which support a transverse rod 33, Fig. 3. Mounted on the rod 33 for free oscillatory movement are a plurality of spaced fingers 34 .which extend in parallel re lation beneath the wall 23. Figs. 3 and 7a, each finger 34 terminating in an inclined surface as shown in Fig. 3. The fingers 34 are positively 15 biased for movement in a counterclockwise direc tion, Fig. 3, and, to this end, it is desirable that each finger be formed with an olîset mass of ma lterial 34a of sufficient weight to obtain the de sired biasing effect. To prevent the operative 20 ends of the fingers 34 from dropping unduly, it is desirable for each finger 34 to comprise a sec tion 34b through which is threaded a screw 35 Coactable with the lower surface of the wall 23, 25 movable as a unit in either direction longitudi Fig. 3. nally of the shaft I3. Coactable with the type wheel I4 is a platen or presser bar I9 which is normally biased to the position shown in Fig. 3 and which is intermittently actuated, as herein 30 after described, for printing purposes. As shown in Figs. 1 and 2, a pair of the legs 5, Referring particularly to Figs. 3, 5 and 6, there is shown a frame 36 which, along >each side thereof, comprises a pair of spaced ears 31, 31a so arranged that one pair thereof fits snugly'be tween one pair of the ears 30, 30a while the other pair thereof fits snugly between the other pair of 6 support a suitable bracket on which is mounted a reel 20 having a web W wound thereon._ This the ears 30, 30a. As shown on the drawings, a screw 38 is'threaded through the pair of ears web, in the example shown, is of suitable trans 30, 38a at the left, Fig. 7, and the pair of ears 31, 31a. which are registered therewith. It re sults, therefore, that the frame 36 may be swung clockwise from the full to the broken line posi tion of Fig. 5 about the pin 38 as an, axis. The frame 36 may positively be retained in the full line position of Fig. 5 by a screw 39 threaded in the ear 3l)> shown at the right of Fig. 7. In accordance with my invention, the screws 38 and 39 may be interchanged from the respec tive positions shown in Fig. 5. If this is done, the frame 36 may be swung from the full to dot-and-dash line position of Fig. 5 about the relocated pin 38 as an axis. 'I‘he advantage of this feature will be hereinafter pointed out. 35 parent or translucent material, such, for exam ple. as Cellophane From the reel 20, the web W extends upwardly between the type wheel I4 and platen I9, said web W further extending through ‘the projector P as hereinafter to be described. 40 After the printing wheel I4 has been rotated to - 25 a selected position, the platen I9 is actuated to thrust the Vweb W intoengagement with the se lected character on said printing wheel. The projector P comprises a housing 2| suit ably supported on the standard 4, said housing having disposed therein a lamp bulb 22 or other suitable source of illumination. Light from the lamp 22 emerges as a light beam through a lat eral opening 2Ia in the housing 2I. Mounted in upstanding lugs 48, 40a of the Arranged in horizontal alinement with the ' frame 36 is a rod 4I on which a plurality of roll 50 aforesaid opening 2Ia is a light passage formed ers 42 are mounted. These rollers 42 comprise 50 by a bottom wall 23 and spaced side walls 24 and sections 42a_ which coact, respectively, with the 24a, these walls forming a single casting which » aforesaid rollers 32 and each roller 42 also com is suitably secured to the lamp housing struc prises sections 4217 which gives Weight thereto. 55 ture. Disposed in the light passage thus formed As clearly illustrated in Fig. 3, the rollers 42 are a pair of condenserlenses 25, 25a which are are loosely mounted on the rod 4I whereby they detachably retained in operative position in suit are biased in a downward direction for a reason able manner, as by thetransverse rod 26 and hereinafter to be stated. spring members 21. 60 Transversely arranged -with respect to the side walls 24, 24a is a front4 wall 28, Figs. 3 and 7, which forms a part of another casting suitably secured to the casting which comprises thewalls 23, 24, 24a and which vis provided with an aper 65 ture 28a forming the projection field of the here in described projection mechanism, the con denser lens 25 also abutting said wall 28v as clear ly shown in Fig. 3. Y As illustrated particularly in Fig. 3, the afore 70 said front wall 28 comprises upper extensions 29v at the respective opposite sides thereof, 'each of these extensions terminating in a pair of spaced ears 30, 30a, Fig. 7. The extensions 29 of the front wall 28 form bearings for a. transverse shaft 3| on which a ‘ The aforesaid frame 36 comprises sections 36a, 36a extending downwardly outside of the path of 60 vthe projecting light beam, said sections carrying a journaled‘shaft 43 having a plurality of spaced wheels 44 mounted thereon for rotatable move ment therewith. Preferably, as illustrated, the wheels 44 are edged and they are so spaced that each wheel 4'4 coacts with one of the aforesaid . fingers 34. - Secured tothe frame 36 is a bracket 45 formed in part ‘as an annulus for the reception of the casing 46 of an objective lens. ’I'he'bracket 45 70 also' comprises depending sections which carry a plate 41 on which a mirror 48 is suitablyv se cured, as by the spring clips 49. In order to place the herein described projector mechanism in condition for operation, the frame 75 3 L 2,128,868 36 is swung on the pivot 38 until said frame to gather with the parts carried thereby are moved into the position shown at the left of Fig. 5. A length of the web W is then drawn through the printing device D and laid against the plate 28, said web resting on the' rollers 32 and projecting therebeyond. The frame 36 is then returned to the full line position illustrated in Fig. 5 and the screw 33 placed in the position shown to positive 10 ly lock said frame in operative position. In so doing, the rollers 44 move against a transverse section of the web W which is gripped between said rollers and the fingers 34. At the same time, the roller sections 42a come into coacting relation with the respective rollers 32 whereby a second transverse section of said web is gripped. Preferably, as shown in Figs. 1, 2 and 13, an area of the top wall of the cabinet C, above the lamp housing 2|, is provided with the slots or 20 passages 50. The web W is passed through this top cabinet wall C and arranged in overlying re lation with respect to this slotted area, said web 'extending beyond the cabinet and hanging down at one side thereof as clearly shown in Figs. 1 and 2. The mechanism with the web W properly posi tioned therein for the printing and projecting operations is shown in Figs. 1 and 3. The print ' ing mechanism D, as hereinbefore described, com 30 prises the printing wheel I4 which moves step by-step along the shaft I3 transversely of the web W, while the latter is stationary, to print a > line of information thereon. At the conclusion of each line-printing operation, the printing wheel | 4 is automatically returned to its initial position and, simultaneously, a step of movement is imparted to a train of gear mechanism which includes the gears 5| and 52, Fig. 3. 'I‘he gear 52 is carried by a stub shaft 53 rotatably mount ed in a bracket 54 carried by a rod 55 secured to the frame of the printing device D, the bracket 54 being maintained in the proper adjusted po sition on the rod 55 by a screw 56,. The shaft 53 is operatively connected to the shaft 3| and,preferably, a flexible shaft 51 is thus utilized, one end of the shaft 51 being connected to the shaft 53, Fig. 4, and the other end of said shaft 51 be ing connected to the shaft 3|, Fig. 7. `The rollers 32 are mounted on the shaft 3|, the web W being gripped°between these rollers and the roller sections 42a. Accordingly, it re sults that veach return of the printing wheel I4 to its initial position eifects actuation of the rollers 32 whereby a step of movement is im parted to the web W, the gear ratio being so ’ ters then on the web section in the projection field 28a. These images remain stationary on the screen while the web remains stationary but, each time that the printing wheel I4 returns to its initial position, the printed lines on the web are stepped upwardly` to thereby impart corre sponding movement to the lines of images on the screen. An important feature of my invention involves the passage of the web W exteriorly of the casing C and over the grooves 50. Heated air from the lamp 22 ascends through these grooves and con tacts with the overlying web section~ to effect rapid drying of the ink thereon. This is ad vantageous because permitting the web section 15 beyond the grooves 50 to be handled without smudging the inked characters thereon. Another important feature of my invention re lates to the disclosed arrangement for transverse ly gripping the web W at spaced points both 20 above and below the projection field.- It is high ly important for that web section in the projec tion iield at any given time to be substantially taut and plane in configuration, i. e., unwrinkled and undistorted. This, in accordance with the 25 present invention, is accomplished in a highly de sirable manner. ` Immediately below the projection field, the 4~ web W is gripped at spaced .points thereacross by the rollers 44 and the fingers 34 which coact, respectively, therewith, the offset weights 34a on each of the fingers 34 functioning to bias the lat ter toward the rollers 44 with sumcient force to grip the web W in the desired manner. It fol lows, therefore, that equal restraining forces are applied to the web W at spaced points thereacross and it is against these forces that the web is pulled upwardly by the rollers 32. The latter to gether with the roller sections 42a also grip the web at spaced points thereacross and, in an even 40 manner, move the web upwardly against the re straining force applied thereto by the fingers 34. In practice, it has been demonstrated that a Web-restraining and -pulling arrangement of the character just described is highly ad 45 vantageous and efficient because maintaining the web. section in the projection field plane and‘ even with resultant highly satisfactory projection. The provision of the edged roll ers 44 is highly important because these rollers 50 coact with the freshly inked surface of the web W. However, since these rollers are of knife-edge con-v figuration, little or no smudging of the ink oc curs. The use of weights, i. e., the finger sections 55 chosen as to obtain the desired spacing between v34a and the roller sections 42h, gives improved the printed lines. As shown in Figs. 1 and 2, the results compared with the spring arrangements web 'W extends over the slotted cabinet area 50 and hangs down beside the front cabinet wall. The action of gravity on this hanging web sec tion tends to keep the web relatively taut back to the wheels 42. It follows, therefore, that the web W is moved upwardly step by step to bring the successive lines of printed matter into the projection field, i. e., the field defined by the aperture 28a of plate 28. Light from the lamp 22 passes from right to left, Fig. 3, through the condenser lenses 25, 25a, through the aperture 28a, and then through the web section defined by said aperture, the light which heretofore have been ¿generally utilized for biasing purposes. The heat generated by the pro- jection lamp and other adverse factors cause the 60 force of a biasing spring to vary or change from time to time. The biasing effect of the above described weights, however, is constant and ln variable. Another important advantage of the herein de 65 scribed invention relates to the arrangement whereby the frame 35 together with the parts beam thereafter engaging the mirror 48 and be carried thereby may be swung to one side when it becomes necessary to rethread the web through the projector field or otherwise service parts of 70 the machine.4 By virtue of the disclosed arrange ing deflected vertically upward through the ob jective lens 46, said light beam thereafter passing to any suitable reflecting system and screen, not skilled worker. v shown, where images appear of the tape `charac ment, the web rethreading operation is extremely simple and readily performable even by an un ' A further feature of importance relates to the 7.5 4 2,128,868 interchangeability of the pivot pin for the frame 36. Accordingly, it follows that said frame may be moved to either of the broken line positions illustrated in Fig. 5, it being necessary simply to reverse the respective positions of the screws 38 and 39 as desired. It may be desirable thus to interchange these pivot screws due to some local condition arising in connection with a particu lar installation which might prevent pivotal 10 movement of the frame 36 in one direction while permitting free pivotal movement in the other di rection. In Fig. 2, I have illustrated the printing mech anism D in the servicing position thereof. The door d of the cabinet C has been removed and lthe turntable 2 has been rotated through an an gle of 180 degrees. Thereupon, after release of the latches 8, the printing mechanism is swung 0n the legs 5, 6 to the extent permitted by the 20 chains I0. It will be observed that the flexible shaft 51 is of such length that the described movement of the printing device D to servicing position may be effected without interfering with the driving connection between said printing de 25 vice and the web-pulling rollers 32. This, ob viously, is a distinct advantage. After the print ing device D has been returned to normal posi tion, the web section exteriorly of the cabinet may be grasped to pull the web through the pro 30 jection ñeld until the slack has been taken up and, thereafter, the normal printing and web pulling action occurs. Referring to Figs. 11 and 12, there is illustrated a modified arrangement for biasing the web into 35 engagement with the rollers 44. Thus, in lieu of the fingers 34, there is utilized a bar 60, the length of which is about the same as the width `of the web W. The bar 60 is pivoted for movement in a horizontal plane to a second bar 6| which 40 at one end projects beyond the wall 24 and at its other end projects beyond the wall 24a. Pivoted exteriorly on each of the walls 24 and 24a is a bell crank lever 62 ‘which comprises an offset weight section 62a, the levers 62 being suitably 45 connected to the respective opposite ends of the bar 6|. The levers 62 tend to move in a clockwise di rection, Fig. 12, whereby the bars 6| and 6|) are biased in a direction from right to left, Figs. 11 50 and 12. The bar 60 comprises a sloping surface and maintains the web W against the rollers 44 with the required degree of pressure, the pivotal mounting for said bar 60 permitting the same to assume the proper operative position with respect 55 to the rollers'44. Thearragngement of Figs. 11 and 12 as thus described gives satisfactory results although the arrangement involving the fingers 34, at present, is preferred thereover. In Figs. 8 and 9, I have illustrated a modifica 60 tion of the invention as regards the driving con nection between the printing device D and the projector mechanism P. As shown, the member 55 supports a bracket 10 which carries a stub shaft 1| having secured thereto a cam 12 together with 65 a gear 13 which meshes with the aforesaid gear 5|. Pivoted on the bracket 19 is a frame 14 car rying a cam follower 15 and a mercury switch 16, the frame 14 being biased by a spring 11 in a clockwise direction, Fig. 8, whereby the fol 70 lower 15 is maintained in engagement with the cam 12. Leading from the switch 16 is a cable comprising a. pair of conductors which lead to the respective terminals of a solenoid 18, said cable including the plug 19 which is readily detachable 75 from the socket 80 for opening the circuit to the solenoid 18. The solenoid 18 may be mounted on the exterior surface' of the wall 24 and is uti lizable for actuating a lever 8| which terminates in a gear segment 82 disposed in meshing rela tion with respect to a gear wheel 83 loosely mount ed on the aforesaid shaft 3|. Rotatable with the gear wheel 83 is a disk 84 to which is pivoted a pawl 85 coactable with a ratchet wheel 86 ro tatable with said shaft 3|. 'As clearly appears in Fig. 8, the cam 12 is of the double-surface type and, as shown in this iig ure, the cam is in one of its normal positions.~ The gear ratio of the train of mechanism lead ing up to the gears 5| and 13 is such that each actuation of said train of mechanism, as effected by the return of the printing wheel I4 to its initial position, causes the cam 12 to rotate through an angle of 180 degrees. It follows, therefore, that when said printing wheel I4 returns to its normal position as stated, 20 the cam 12 is rotated counter-clockwise, Fig. 8, through an angle of 180 degrees. As a result, the switch 16 is tipped in a clockwise direction, Fig. 8, and the circuit through the solenoid 18 is closed. Accordingly, the lever 8| is moved in a counter-clockwise direction, Fig. 8, to thereby im part a rotatable step of movement to the shaft 3| while the web W is correspondingly moved through the projection field. . Movement of the cam 12 through the angle of 30 180 degrees occurs almost instantaneously and, as will be obvious, the switch 16 is immediately returned to the position shown in Fig. 8. As a result, the circuit through the solenoid 18 is re opened and the lever 8| returns to the position 35 shown, the pawl 85 idling with respect to the ratchet wheel 86. The mechanism is now in con dition to impart the next feeding impulse to lthe web W which occurs, in the manner described, as soon as the printing wheel |4 again returns to its 40 initial position. ’ When the application of energy to the shaft 3| is discontinued in response to deenergization of the solenoid 18, there occurs some reverse move ment of the shaft 3| in a counter-clockwise di 45 rection, Fig. 8, unless special mechanism is pro vided to prevent such reverse movement. Mech anism` for this purpose is illustrated in Figs. 9 and 10. As shown, a housing 95 is suitably secured to the extension 29 of the wall 24 and this housing has a disk 94 rotatable therein, the disk 94 being secured to the shaft `3| for rotatable movement therewith. The housing 95 comprises a passage having therein a ball 93 biased by a spring 90 into engagement with the edge of the disk 94. When the shaft 3| is moved in web-feeding direction by the pawl 85, it moves in a clockwise direction, Fig.' 10. During such movement of the shaft 3|, the disk 94 merely thrusts the ball 93 against the spring 90. However, as will be obvious from Fig. 10, the ball 93 functions as a locking dog and positively prevents counter clockwise movement of the disk 94 and the shaft 3| which is connected thereto. Since the ball 93 and disk 94 function as just stated, it results that the shaft 3| does not recede, even slightly, from the position to which ad vanced by the pawl 85. This is highly desirable because preventing the occurrence of sag of the 7. web section in the projection field. Should this web section sag, the resultant projection is more or less unsatisfactory due to poor image focus. Use of the mechanism last described, namely, the housing 95, disk^’94, ball 93 and spring 90 2,128,868 is highly desirable with all forms of my invention. Hence, in Fig. 7, I have illustrated such mecha nism as applied to the shaft 3l to prevent reced ing movement thereof after the application of 5 energy to the shaft 51 has been discontinued. With an arrangement of the character de scribed in Figs. 8 and 9, it is necessary merely to detach the members 19 and 80 when the print ing device D is to be moved to a position such as l0 shown in Fig. 2. If desired, the conductor ar 5 projector, the top wall of said cabinet above said lamp housing being provided with passages, said web passing from said projector across thev top wall of said cabinet and over said passages whereby heat from said lamp housing dries the 5 ink on the web section overlying said passages. 3. In combination, a projecting device, a print- i ing device, a cabinet within which said devices are normally received, means for moving one of said . -devices to the exterior of said cabinet, and a 10 . rangement connected to the members 19 and 80 - flexible shaft for transmitting power from one may be of suñicient length to permit said print ing device D to be moved to the position last named without separation of said members 19 l5 and 80. With such an arrangement, operation of the printing device need not be discontinued when the latter is in its servicing position. In the appended claims, it shall be understood that the expressions “means for printing”, 20 “printing device”, or equivalent expressions generically comprehend a Dow-Jones or other printer, or any equivalent arrangement such, for example, as a. typewriter, teiautograph, etc. for .1 producing or forming characters in line form » transversely of a traveling web. , While the invention has been described with respect to certain particular preferred examples which give satisfactory results, it will be under stood by those skilled in the art after under 30 standing the invention, that various changes and modiñcations may be made without departing from the spirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and modifications, 35 What is claimed as new and desired `to be se cured by Letters Patent is: 1. In combination, means for printing char acters on a web with ink, a projector including alamp housing for projecting images of said if i characters, Ia cabinet for said printing means and projector, said web passing from said pro of said devices to the other, said 'flexible shaft thus transmitting power when said one device is .either interiorly or exteriorly of said cabinet. 4'. In combination, a projecting device, a print- 15 in‘g device, a cabinet within which said devices are normally received, means for moving said printing device to the exterior of said cabinet, and a ñexibleshaft for transmitting power from said printing device to said projecting device, said 20 iiexible shaft thus transmitting power when said printing device is either interiorly or exteriorly of said cabinet. ’ 5. 'I'he combination with a device for print ing characters transversely on a web, said device 25 having a gear wheel actuated at the conclusion of each line-printing operation, of means for drawing said web through a projection field, a shaft for operating said drawing means, a gear wheel in which said shaft terminates, a bracket 30 frame carrying said second named gear wheel, and means for adjusting the position of said frame to dispose said second named gear wheel in meshing relation with said first named gear wheel. 6. The combination with a device for printing 35 characters transversely on a web, of -a projector and a projection field mounted in fixed position, means for imparting movement to said web to draw the same through said projection field at the conclusion of each line-printing operation, means 40 for movably supporting said printing device jector across the top wall of said cabinet, and _ whereby it may be moved to a servicing position means whereby heat from said lamp housing has free access to a section of the web overlying said 45 top wall so as to dry the ink thereon. 2. In combination, means for printing char acters on a web with ink, a projector including a lamp housing for projecting images of said char acters, and a cabinet for said printing means and wherein it is spaced from the ñxed projection field, and means whereby said supporting means and said printing device may be located in a prede- 45v termined position with respect to said fixed pro jection ñeld. . FRANK E. WELLER.