US2135541A - System and apparatus for handling paper for printing machines - Google Patents

Description

Nov. 8, 1938. STUART ET AL 2,135,541

SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES 8 Sheets-Sheet l VENT " NEY.

mm Aal w mw M N E 4 mm mom; a m M W1 Wm %N NOV. 8, 1-938. 1 STUART AL 2,135,541

SYSTEM AND APPARATUS FOR, HANDLING PAPER FOR PRINTING MACHINES Filed Aug. 15, 1955 8 Shets-Sheet 2 ll'll ORN ' Nov. 8, 1938. R. STUART ET AL 2,135,541

SYSTEM AND APPARATUS FOR.HANDLING PAPER FOR PRINTING MACHINES Filed Aug. 15, 1935 .8 Sheets-Sheet 3 Nov. 8 1938. R. STUART ET AL SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES 8 Sheets-Sheet 4 Filed Aug. 15. 1935 Nov. 8, 1938. R. STUART ET AL 2,135,541

SYSTEM AND APPARATUS FOR HANDLING PAPER- FOR PRINTING MACHINES Filed Aug. 15, 1935 s Sheets-Sheet 5 61 \Nm, W mwfw wl. vw u T N 0 T 1% A l Nov. 8, 1938. R. STUART ET AL 2,135,541

SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES Filed Aug. 15, 1955 8 Sheets-Sheet 6 MQN mam lllllIlH IlIlll lLl Nov. 8, 1938. RSTUA T' ET A A 2,135,541

SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES Filed Aug. 15, 1955 s sheets-sheet 7' ATTORN Nov. 8, 19 38. R. STUART ET AL 2,135,541

SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES Filed Aug. 15, 1955 8 Sheets-Sheet 8 Patented Nov. 8, 19 38 SYSTEM AND APPARATUS FOR HANDLING PAPER FOR PRINTING MACHINES Robert Stuart, Forest Hills, N. Y., and Matthew H. Loughridge, Bogota, N. J. Application August 15, 1935, Serial No. 36,392

. 77 Claims.

This invention relates to a system and the apparatus used in connection therewith, for taking up, aligning, and delivering paper sheets to aprinting machine and it is shown in connection with the common form of typewriter. The paper is automatically located ,in the correct writing position and after a predetermined. number of lines have been written it is automatically removed from the machine and conveyed to a tray and a fresh sheet of paper is supplied for repeat ing the operation. The system further contemplates the control of the paper feed in such a manner that the paper may be located for writing purposes in a plurality of positions in which any number of lines, with any line spacing, may be used for writing in each position. After the writing operation is completed the paper is automatically removed from the machine and a'new writing sheet located for repeating the operation. One purpose of the system is to address envelopes supplied automatically from a tray. When the predetermined number of lines for the address is written, the machine completes the cycle of operation by removing the envelope that has been addressed and supplying a new envelope in its place for another address. Another use of the system is to fill-in the headings of circular letters and, if required, to fill-in specific data in the body of the letter for each cycle of operation. Another use for the system is to sup ply, the name and address and the charges on billing forms.- Other uses of a similar character are readily supplied by the system. in which the main purpose is to eliminate the manual handling of the paper to and from the writing machine and .to limit the manual operation to the writing itself.

In the application of this system, a mechanism is provided for lifting the paper tobe written 40 upon, one sheet at a time, from a'tray, and this mechanism cooperates with a conveyor which carries the sheet forward to a feed roller where it is aligned and held in readiness to be delivcred to the platen roller. At the proper time in the cycle of operation the feed roller delivers the paper sheet to the platen roller which is revolved to a predetermined extent to position the paper in the correct writing position; At this point the automatic operation ceases until the predetermined number of lines have been written on the sheet in the usual manner by the typewriter keyboard. If another writing position'is required on the same sheet, the platen is then automatically rotated until the new writing position is reached and after a predetermined number of lines have been written, the sheet may be moved to another writing position by a further rotation of the platen, or the system may be adjusted to discharge the sheet from the platen as soon as any of the writing operations have been completed. A see '6 0nd conveyor carries the discharged sheet forward from the platen and delivers it into a storage tray. In the form selected to illustrate the system the various controls are carried out electrlcally, the apparatus operates entirely independently of the typewriter machine and may be used with any of the common forms of type! writer. The only connection between the typewriter and theapparatus is the connection for rotating the platen. 15

The apparatus used for carrying out the various functions of the system embodies certain novel features, most of which are of general application in the printing art and each of these features may be used alone, or in combination with the other features orvwith other systems of paper feed.

The paper lift comprises a roller mounted above the paper tray, on a swingingframe, which enables the roller to adjust itself automatically fi to the height of the paper in the tray. This" roller is "belt connected with the conveyor system and is normally held clear of the paper except when a sheet is to be taken out. For this purpose a pair of vacuum cups are provided on the roller, 30 v sheet to the feed roller. The feed roller is provided with a longitudinal iedge, which, in the normal position, engages the end of the sheet as it comes 'from'the conveyor and as this roller is rotated a cam portion of its 40 surface is brought into action to carry the paper sheet forward to the platen of the writing machine. 'In order to insure that the paper sheet is properly aligned on the ledge of the feed roller,

the platen'to a predetermined extent to locate 55 the paper in the first writing position. In this position the number of lines that are to'be written are known and a stepping mechanism, operated by the carriage of the typewriter, when the number of lines have been completed and the carriage is restored to the starting position, sets up the condition for the next movement of the platen. If this condition requires a second writing position on the paper, the platen is automatically rotated to locate the paper in this writing position and, after the required number of lines are written in this second location, the stepping mechanism operated by the carriage then establishes the conditions for discharging the paper completing the cycle of operation and restoring the apparatus to the normal or starting position.

In the final operation of the platen, which discharges the paper, the lift roller is operated therewith to lift a new sheet and place it on the conveyor and the feed roller is moved to the normal position to arrest and align this sheet of paper. In the operation, as shown in the drawings, the platen is designed to make three complete turns for one cycle of operation, the printing'positions of the platen may take one or more .turns and the final operation completes the balance of the revolution of the platen until three complete turns have been made and the system is restored to the starting position. In each cycle of operation the feedroller is controlled to make one-half turn with the first movement of the platen and to complete a single rotation with the final movement of the platen and the lift roller makes one revolution for each cycle of operation.

In the control of the system the sequence of operation of the various parts is obtained by a progressive control of the following movement by the movement of the preceding apparatus and the extent of the movement is controlled by the part itself. In the electric control, movements cannot be prematurely obtained nor can a movement be had out of its sequence in the operation of the system.

The apparatus by whichthese and other features are accomplished-and the mode of operation will be more fully understood from thefollowing specification and the accompanying drawings, in which Fig. 1 is a side elevation of the machine applied to a typewriter, showing the supporting frame and the general mechanism;

Fig. ,2 is a plan view of the machine from the top, showing the top conveyor only;

Fig. 3 is a plan view, partly sectioned, showing the mechanism for automatically rotating the platen;

Fig. 4 is a stepping wheel and operating mechanism for registering the number of lines that have been written;

Fig. 5 is a section on line 5-5 of Fig. 3;

i Fig. 6 is a section on line 6-4 of Fig. 3;

Fig. 7 is a vertical section on line 1-1 of Fig. 3;

Fig. 8 is a side elevation, partly sectioned, of the feed roller, platen and paper guides;

Fig. 9 is another side elevation, partly sectioned, of the feed roller in another position, and the platen;

Fig. 10 is a detail of the mechanism associated with the feed roller;

Fig. 13 is a plan view corresponding to Fig. 12;

Fig. 14 is an elevation of the take-up roller, partly sectioned, showing the application of the Venturi suction tubes;

Fig. 15 is a detail of the air control system on line l5, Fi 14;

Fig. 16 is an alternative form, shown in elevation, of the take-up roller, using rubber vacuum cups;

Fig. 17 is a plan view of a paper tray provided with a light valve for controlling the elevation of the tray as the paper is removed; 7

Fig. 18 is an elevation of the mechanism in Fig. 17, including the apparatus for elevating the tray;

Fig. 19 shows another form of the invention in which the platen roller is driven by a friction roller which is operated by the driving mechanism;

Fig. 20 is a plan view of the mechanism for operating the stop fingers and the gripping rollers in connection with Fig. 19;

Fig. 21 is a side elevation, in diagram form, showing the relation of the friction roller to the platen roller and the stop fingers for controlling the paper feed;

Fig. 22 is a diagram of the operating circuits, and

Fig. 23 is -a cross section of the adjustable circuit controller for controlling the position of the sheet on the platen.

General arrangement of apparatus In Fig. 1, ll represents a table or stand upon which the apparatus is placed, i2 is the typewriting machine having the platen l3 mounted in the usual carriage l4 which slides to the left as the writing progresses as indicated at i5. i6 is the driving mechanism which is coupled to the platen roller 13 and is connected by a flexible drive I! with the motor i 8.

The conveyors and the paper take-up are supported by the frame member l9 to which the member 20 is adjustably clamped for adjusting the height of the mechanism. The frame 2i of the lower conveyor is secured to the supporting tor i8, through a suitable reduction gear, drives the belt wheel 30, which by belt 3|, and belt wheel 32, drives the main shaft 33. This shaft through belt 34 drives the conveyor belts 40 and II of the upper conveyor and through roller I53, Fig. 13, drives the conveyor belt I11 leading to the feed roller 26. p

Aframe 36 is pivoted on shaft 33 and carries I at its outer end. paper take-up roller or drum 31,

which is mounted above the stack of paper 38 in the tray 39 which is fixedly supported on the table I i. As the paper is removed from the stack, I

take-up roller '31, through the pivoted arm 38, follows the paper. The conveyors are shown. in the drawings as of the usual type made of a plurality of bands but they may-be made from a 'single belt or inother well knownforms.

The automatic drive for platen The mechanism for rotating the platen position the paper in one or more writing positions and finally to discharge the paper from the machine is illustrated in Figs. 3, 5, 6 and 7. The shaft 50 of the platen I3 is coupled at 5| with. the splined shaft 52 which passes through the housing 54 of the mechanism. This housing is supported by a vertical plate 53 which has a base 53a. to rest upon a fixed support and-the mechanism is clamped thereto by the hook bolts 56 and nuts 55. An aperture 51 is provided in plate 53 considerably larger than shaft 52 so that the mechanism may be clamped in place, properly aligned with shaft 50.

The flexible drive l1 connects to the worm 59 which engages the worm wheel 58, mounted on shaft on which shaft the gear 8|, Fig. 5, is mounted. Gear 6i engages gear 52, mounted on shaft 53, and it also engages gear 54, mounted on shaft 65, so tha when the motor I8 is running the shafts 53 an are continuously rotating. Mounted on ,the shaft 83, Fig. 6, is the gear 56 which engages gear 61, splined on shaft 52, which shaft is coupled to platen 13; also on shaft 65 the gear 68 is mounted which likewise engages gear 61, splined on shaft 52, thus rotating either gear 65 or gear 58 will rotate the platen. Gear 66' is connected with shaft 63 by' an electrically controlled friction clutch 69 and gear 58 is similarly connected with shaft 65 by clutch H.

The friction clutch59, Fig. 7, when moved to the left, engages the clutch member 10, and. 69 being splined on shaft 53, it thereby causes gear 66 to rotate with gear 52. This clutch is operated by the armature lever 14, pivoted at 15, and held in the released position by spring 16, which is opposed by magnet 1-3, so that when 13 .is energized, the clutch is brought into engagement and when 13 is deenergized-the clutch is immediately disengaged. A corresponding mechanism is used on shaft 65 in which .the clutch H is brought into engagement with clutch member 12 to rotate gears 54 and 68 together on shaft 65. The clutch H is operated by armature lever 18, pivoted at 19, and controlled by magnet 11 in a manner similar to the clutch 69.

The gear ratio between the drive shaft 60 and the driven shaft 52 is lower when the clutch 59 is engaged than when the clutch H is engaged, with the result that when magnet 13 is energized,

and which corresponds to the condition in which the paper is located in the writing position, the platen is rotated at a lower speed, due to the difference in the size of the gears, than when magnet 11 is energized and which corresponds with the condition in which the paper is discharged from the platen. The high speed in which the paper is discharged from the machine projects it forward onto the conveyor and enables the conveyor" to be spaced a distance from the platen that will permit the use of the longest commercial sheets of paper without having theupper ends of these sheets engaging the conveyor at any writing position. At the same time, short sheets are projected forward by the high speed of the platen to engage the conveyor.

' Control of platen The machine is intended-to operate on-long sheets of paper as well as on short forms and envelopes. To position the paper on the platen may require more-than oneturn of the platen and to ultimately discharge the paper from the platen may require more than two turns of the 6, in which the ring 8! is geared to the wheel 81 and is mounted to rotate on the stationary disc 83 which is secured by the hollow nut 84 to the upstanding head 85 of the frame member 54. The ring 8! is held in place by the cleat .82 and 5 carries the contacting band 86 which controls the circuit of magnet 11. This ring or band is provided with the dead or insulated section 81 which marks the beginning of a cycle of opera-g tion. It will be noted that as the shaft 52 is rotated the ring 8| is also rotated and it requires three turns of gear 6-1 to complete one turn of the ring 8| or one cycle. of operation. The hollow nut- 84 enables the electrical conductors, whose circuit is controlled by 86, to pass through this nut. I

The electrical control of magnet 13 is obtained by the disc 90 and'the disc 88 mounted thereon and rotated by shaft 52 through a frictional engagement thereof so that these discs can be positioned to control magnet 13 through the contact fingers 89, 9|, at any position of the platen desired, as more fully described in connection with the operating circuits, Figs. 22 and 23.

Mounted on the outer end of the shaft 52, Fig. 4, is an adjustably positioned bracket 02, carrying the detent 93 which engages the stepping v wheel 94, mounted at on the bracket 05 which is secured to the supporting plate 53. A spring pressed roller 91 engages the teeth'of 84 to hold it in position. Each movement of the typewriter carriage to the right, which is preliminary to starting a new line, moves the stepping wheel 94 one step for setting up a control as defined in 1 the operating circuits for either changing the 35 platen to move the paper to a .new writing position or for completing the cycle of operation bydischarging the sheet of paper from the machine. It will be noted'that the splined shaft 52 is the only part which is mechanically connected with the typewriter and in order to apply the mechanism to existing machines, the splined shaft 52 slides through the mechanism. It is obvious that if a special platen is provided the spline, could be located in the platen roller itself.

The feed roller In Fig. 9, the type bar is indicated at l0l engaging the platen roller l3 in the writing position, this roller is provided with the usual paper guide I02 and the spring pressed roller I03, mounted on the paper table I04 for conducting the paper sheet I05 into the writing position. Thepaper sheet 005 is brought forward by the conveyor belt I06 and is directed by the paper guide I01 to the ledge I08 of the feed roller 20. This ledge extends longitudina1ly of the roller and forms a-stop for the entering edge of the paper sheet and upon which the paper sheet is aligned. The feed'roller 26 has a raised or cam surface I09 which as the roller rotates in the direction of the arrow, clamps the paper sheet I05 between this roller and the spring pressed roller ill and thus urges the sheet forward to engage the platen during approximately one-half revolution of roller 26, representing the surface of cam I09. -As soon as the paper sheetis engaged between the platen l3 and the roller I03 the paper is released by roller 26 owing to the depressed part of the roller indicated at 0, registering with roller III as indicated in Fig. 9. It will be noted in this figure that the paper I05, now in writing position on the platen, is free of. the feed roller 28 and the longitudinal movement of the platen l3 with the carriage, and the paper I05, is not interfered with by the feed roller 26. The paper discharged from the platen is projected between the guides H2 and H3 and below the spring pressed roller H5 onto the upper conveyor H4 from which it is conveyed to the tray 28. If the nature of the paper to be written upon requires the immediate engagement of the roller III with the cam I09 when the ledge I08 is cleared, a cam arrangement as shown in Fig. 10 may be provided to secure this result. In this construction the support of the roller III is extended and connected with the arm H9 which is provided with the slot through which the axis of the roller 26 passes and this roller has a cam H6, with a rise H1, which engages the roller H8 of the arm H8 and which is arranged to pull the roller: I II into engagement with cam I09 at the proper time.

Aligning the paper sheet In order to insure that the paper sheet I05 is properly aligned with the mechanism, a detector arrangement is provided as shown in Fig. 11, and which comprises the light bulb I24, placed in line with the diametrical opening I23 in the feed roller and so arranged that when the sheet of paper I05 is absent a light from the bulb shines directly upon the photo-electric cell I25 and thereby establishes a circuit to indicate this condition, the application of which is described in the operating circuits. The system contemplates a pair of detector circuits, one operating through the hole of I22 and the other operating through the hole I23 in Fig. 3. These holes are spaced apart to correspond with the outer edge of the paper and the control is so arranged that the paper must rest on the ledge I08 in such position as to block the light through both apertures at the same time, which results in the paper being properly aligned for writing purposes.

Drive of feed roller The feed roller is driven by a friction drive from roller 26. The arm I8I is pivoted at I34'on the axis of roller 26 and has 'an extension carrying the armature I,35 to be attracted by the magnet .I36, secured by bracket I31 to the frame 25. When this magnet is energized, the arm I3I is moved towards the platen I3 so that the friction roller I28 is brought into engagement with 26 and I3 and thesliding motion of plate I30 enables the frictional engagement to be equalized I between these rollers. When magnet I36 is deenergized, spring I36 moves the arm. 3I away "from the platen and immediately disengages the friction drive. It will thus be noted that when magnet I36 is energized the rotation imparted to the roller I3 is correspondingly imparted to roller 26 and when I36 is deenergized, which condition always prevails during the writing period, the friction roller I28 is held free from the platen and thus avoids any interference with the movement-of the carriage. The magnet I36 may be controlled by a disc I36, rotating with the roller 26 and the contact-fingers I40 and I which are more particularly described in connection with .the operating circuits.

The paper lift In Figs. 12 and 13 the continuous running belt 3| drives the main shaft 33 with the roller I66 and the conveyor belts I16 and I11. Magnet I5I, mounted on frame 2I, has an armature I52,

pivoted at I52a and normally held in the deenergized position by spring I53.. When this magnet is energized the armature I52 moves the clutch I54 on the shaft 33 which is splined at I55, to engage the clutch member I51, of pully I510, and by the crossed belt I58 and pully I59 rotates the paper lift drum 31. One side of this drum I60 is provided with the cam I6I which has a depression at I62. A'roller I63 engages cam IGI and is carried by the lever frame I64 which is pivoted at I65, has a roller I66 resting upon the inner end of the pile of paper 38 so that as the pile is used up this roller follows the paper and lowers the roller I63 supporting the drum 31 so that the drum by gravity, swinging on the arm 36 through the are indicated by. -11, follows the paper in the tray and automatically adjusts itself to the quantity of paper in the tray. The pres sure on roller I63 and roller I66 can be regulated by the counter weight I12, mounted on arm I1I, attached to frame 36 and arranged to counter balance part of the weight of the drum 31'.

The drum 31 is provided with bladesat I63 and I10 which may be used to create an air circulation through the paper as the machine is in use.

The drum has provided thereon a pair of spaced vacuum cups I61 and I68, Fig. 13, which are aligned with the depression I62 of the drum so thatwhen this depression registers with the roller I63 these vacuum cups are, by gravity, forced into engagement with the top sheet of the paper pile and by the suction in the cups the top sheet is lifted from below the roller I66 and carried forward between the Jaws I13 and I14 to the conveyor belt I16 on roller I15 and below roller I18, mounted in the bracket I18 attached to frame 36. The position of a paper sheet being taken up is indicated in dotted outline in Fig. 12 at I in which the vacuum cup I61a has moved forward the sheet to the delivery position. As shown in the illustration, the take-up drum 31 has one set of vacuum cups and makes one delivery for each revolution. Its revolution is controlled by disc I80 and the contact finger I8I which controls magnet I5I as defined in the operating circuits.

The Ventu'ri suction mi It is common practice in printing machines to provide a suction for taking up the top sheet of a pile of paper and to provide an air blast to play on the pile to prevent the sheets from adhering to each other. An arrangement of this kind can be used with the present invention but for ordinary purposes a suction created by a Venturi 'nozzle is preferred. Instead of providing a compressor and a suction pump to operate the system, the Venturi nozzle enables the entire system to be operated by an air blast from a blower which is comparatively inexpensive. The air blast is operated through a pair of Venturi nozzles to create the suction for lifting the paper and then the air is discharged on the paper pile for the through valve I85 with the hollow shaft I80 upon which the drum 91 is mounted. -This shaft is provided with a Venturi nozzle as indicated at I9I and which connects by pipe I92 with the vacuum cup I91. A second Venturi nozzle I 99 connects by pipe I94 with thevacuum cup I99.

The air is discharged from pipe. I90 through the opening I99, connecting with the annular chamber I91 in the collar I 99 which connects to pipe I81 andwhich discharges the air against the paper pile 98 as indicated in Fig. 12. As long as a stream of air is maintained in pipe I90 a suction is maintained at I91 and I99 which lifts the paper and moves it forward as the drum is rotated. As soon as the air stream ceases the air stream.

In the alternative construction shown in Fig.

16 the shaft I90a of the drum 91 is not made hollow as in Fig. 14,- instead the vacuum cups 202 and 209 are connected by tubing indicated at 20I,'with a collar 200 rotating with the drum 91. A second collar I99, secured. to the frame 99 is provided with an aperture at I99, which in one position opens the tube 20I to atmosphere,

but in all other positions of rotation the tube is closed. The cups 202 and209 are made of soft rubber and connect with the tube 20I. When the drum is lowered by the depression I92 of cam I9I, these cups are forced into engagement with the paper, thereby creating a partial vacuum according to the well known'rubber vacuum cups;

' this vacuum lifts a sheet of the paper and as soon as the delivery position is reached the vacuum is released at I99. The tube 20I is made as small as possible sees not to materially iniluence the vacuum created in the vacuum cups.

Elevating the paper tray In the arrangement shown in Fig. 12, the takeup mechanism is shown as beingself-adjusting relative to the height of the paper in the paper tray which rests on the fixed support or table II, Fig. 1. In some cases it is desirable, either with this self-adjusting system or without the selfadjusting feature, to provide a mechanism that will automatically elevate the paper in the paper tray as it isused up; .the arrangement in Figs. 1'1 and 18 is provided for this purpose. This comprises a paper tray 99a. in which the paper pile 99 is placed. A post 205, rising from the bottom of the tray pivotally supports the lever 209 with the cross bar 201 resting upon the paper, so that by gravity the lever 209 is lowered as the paper is removed from below the bar 201. A stand 209, through the slot 209, supports a light bulb 2I0, winch is linked to the lever 209 at 2I I. This has the effect of moving the light bulb 2I9 vertically in the slot 209 as the paper is removed from the tray. n the opposite side of the tray anaperture 204 is provided in the wall and opposite this aperture, on a fixed stand 2 I9; is provided the light cell 2I2 which is directly opposite the light bulb 2I0 when the paper is at normal it is comparatively light it readily releases the sheets as they are taken off.

The light cell 2I2, through the amphfier 2l4 and circuit 2 I 5, energizes relay 2 I 9 when the light from the bulb 2I0 falls upon the cell. When relay 2.I9 is energized. circuit is established from the source of energy B through contact 2I1 and circuit 2! to motor 2 I9. The motor 2I9, through the worm 220, and worm wheel 22I, supported on 222, and threaded. on stem 229, raises the tray 99a, which is guided in its vertical movement by the slide 224, engaging the fixed arm 225. It will be seen that when the paper 98 is below normal and permits the light from 2) to energize 2I2, the motor operates to raise the paper tray until the light is shut oil. When this occurs the circuit is interrupted, relay 2I9 is deenergized and the tray makes no further movement until the paper is again reduced below the normal height when the operation is repeated and in this way the level of the paper is maintained for operating conditions.

Auxiliary roller drive I The driving mechanism for the platen of the.

typewriter may be obtained through an auxiliary roller which can be mounted in the place of the feed 'roller and arranged by a friction drive to cause rotation of ,the platen as desired. An arrangement of this kind with finger stops for the paper sheet and the control therefor is illustrated in'-Figs. 19, 20 and 21. The auxiliary roller 290, through the friction wheel I28, drives the platen I9. which is controlled by the magnet I99 as in Fig. 3. The mechanism which rotates shaft 52 is coupled to shaft 29a of roller 290 so that this roller is controlled in the same way as the platen roller is controlled in Fig. 3. A rod 29I, mounted at the back of the roller 290, carries the arm 292 with the roller 299, also the arm 294 with the roller 295. The rollers-299 and 295 are controlled by the armature 299 which is attracted by magnet 291 tobring the rollers into engagement with the paper sheet I05. Whenthe magnet 291 is deenergized the rollers are moved away from the auxiliary roller 290 by the spring 299.

an arm 242 with the stop stud 249 and a second arm 244, spaced from the first arm, with the stop stud 245. The sleeve 24I has an armature lever 2'49 connected by a stem-241a with the armature 249 which is attracted by the magnet 241 when this magnet is'energized. Spring 249 brings the stop studs 249 and 245 into position to stop the paper sheet. I05 and to hold the sheet in this position until these studs are withdrawn, which occurs when the'magnet' 241 attracts the armatwo 249.

The electrical operation of this apparatus will be understood from the circuits shown in the drawings from which it will be noted that magnet I99 is energized through circuit 9I3a in series with magnet 19 or'magnet 11. Since magnets 19 and." are energized to operate the clutches of the 290 and the platen I9, and causing rotation of the platen I9 in correspondence with the rotation se cured in Fig. 3. In this arrangement the drive is made to the mechanism which is stationary relative to the carriage movement of the platen and a splined shaft is not required.

Magnet 291 is controlled by circuit 25I through contact finger 259 when relay S is energized and through contact 252 when relay P. is energized,

' 4 A sleeve 2" is mounted on rod 29I and carries and magnet 241 is energized through circuit 254,

including contact 255, when relay D is energized,

contact 256 when relay P is energized, and contact 251 when relay S is energized. Thus the op-, erating circuit of magnet 231 is established in multiple by relays S and P and the operating circuit of magnet 24'! is established in multiple by relays S, P and D. In order to deenergize magnet 241 to permit the stops 243, 245 to stop the paper before the cycle of operation is completed the circuit through contact 255 is continued through line 254a, to contact fingers 26I on disc The fingers are bridged by band 262 which interrupts the current before the cycle is completed.

The relay P when energized causes the primary, or first, movement of theplaten'to position the paper for the first writing operation and at the same time it energizes magnet 23'! to cause the rollers 233 and 235 to clamp the paper against theauxiliary roller 230 and thereby deliver the paper to the platen. If a second writing position is to be established, the relay S is energized for this purpose which again establishes the circuit of magnet 231, thereby delivering the paper further to the platen. If, however, the platen is provided with the usual feed rollers, this second energizing of the magnet 23! by relay S will not be necessary.

The stop studs 243 and 245 stand normally in position to stop the sheet of paper from reaching the platen by the action of spring 249. However, when the paper stock is to move forward, these fingers must be moved out of the way to permit the rollers to act upon the paper. As the paper is moving onto the platen when relays P and S are energized and also when relay D is energized,

which relay is energized when the paper is discharged from the platen, the magnet 24! is energized to remove the stop fingers under these conditions. The rollers 233 and 235 engage the paper above the fingers. the instant that the stops release the paper and cause its forward movement to the platen. The control of relays S, P and D will be described in connection with the op erating circuits.

The operating circuits The synchronous operation of the various'parts making up the system will be understood from the operating circuits as illustrated in the diagram in Fig. 22. The control is shown by one side of the circuit only, starting at a source of energy usually indicated by B and the return circuit is indicated by an arrow point. in this diagram relay P controls the circuit of the clutch magnet I3'until the platen has made a predein. this position, the final movement of the stepping wheel 84 energizes relay D to complete the cycle of operation as determined by the controlling ring 8|. When relay P is energized magnet I3li is energized to cause one-half turn of the feed roller 26 and when relay D is energized the feed roller completes its revolution and magnet II is energized to operate the paper lifting drum.

Relay P'is energized through wire 30I by means hereafter to. be described. This is a stick relay controlling its own circuitthrough contact 302, wire 303, wire 304 and contact fingers 305 and 306 bridged by band 301 on disc 90, which is rotated by the shaft 52. Finger 306 connects by wire 308 to contact finger 300 of relay P and to energy B. Wire 3I0 connects to wire 304 and is controlled by contact 3I I, held in the closed position by armature "I8 when magnet 11 is deenergized, and the circuit continues by wire 3I2 to magnet "I3 and to the return circuit on wire 3I3.

-This engages clutch 69 and rotates the platen until the band 301, moving in the direction of the arrow, moves'from under the contact finger 306 and thus opens the circuit from the contact finger 309 to wire 3I0, thereby deenergizing magnet 73 and it also opens the holding circuit on wire 303, causing relay P' to deenergize. The discs 88 and 90 engage an arbor 404, splined on shaft 52, through a disc spring 403, which enables these discs to be adjusted relative to the shaft 52. The

point at which the band 30'! opens the circuit to 306 is the point where the first line in the writing operation begins and the disc is adjusted for this position on a graduated scale. A micrometer adjustment may be obtained supplementary to the adjustment of disc 90 by the screw 402 adjusting the position of the block 40I carrying the contact fingers. A similar adjustment is obtained for the block at 405 by thelscrew 406, carrying the contact fingers engaging the disc 88.

When the relay P- is energized a circuit is established through contact finger 3II, wire 3I8, contact finger 353 of detector relay 354 deenergized, wire 360 to contact finger 3I9, contact 3I9a on band 320, contact finger 32I and wire 322a to magnet I36. This sets up the frictional drive for the feed roller 26"from the platen I3 to move the paper forward to the platen. The contact finger 3I9 maintains the circuit at 3I9a until the insulation 322 is moved by the disc and the band 320 engages the fingers 32I and 32Ia. The energy for maintaining magnet I 36 energized is obtained through contact finger 32Ia until one-half revolutio'n is made and the band 320 is moved from below the contact finger 32I. In this position the feed roller is stopped clear of the paper that .is being fed to the platen as in Fig. 9.

Relay S is energized through wire 323 by means hereafter to be described and closes a holding circuit through contact 324, to wire 325 which connects to wire 3I0 and energizes magnet 13. An energy circuit is established from energy B through contact 329 of relay S to wire 328 and a circuit is established from this wire across the contact fingers 33I by the band 328a until thisband, which is mounted on disc 88, moves around to disengage one of the contact fingers and open the circuit. When the circuit is open, clutch magnet I3 is deenergized and the holding circuit of relay S is deenergized. It will be noted that the holding circuit of relay S and the circuit on wire 3! for magnet 13 is maintained through the contact fingers 33I until the second movement of the platen has been completed. The extent of this movement is determined by the adjustment of disc 80 to position the contact band 328a so as to open the circuit of magnet 13 -at the correct place for beginning the writing in the second position.

Relay' D is energized by wire 335 in a manner hereafter to be described and closes a holding circuit through contact 336 to wire 331, contact wire 3I3.

fingers 339 on disc 93, bridged by contact band 96 and by wire 3 to contact 342 of relay D to energy. Wire 343 connects to wire 331 and to the circuit controller 344, closed by armature 14 of magnet 13 in the deenergized position, to wire 345, magnet 11 and to the return circuit on This engages the'clutch 1| to rotate the controlling ring 8| in the direction of the arrow until the insulated section .91 insulates one of the contact fingers 339 and opens the circuit which deenergizes the clutch magnet 11, and deenergizes the holding circuit of relay D and restores the system to the starting position.

It will be noted that the circuit of the clutch magnet 13 is controlled by the clutch magnet 11' and the circuit of clutch magnet 11 is controlled by magnet 13 so that both of these magnets cannot be energized at the same time. In the rotation of the platen as controlled by discs 99 and 99 a corresponding rotation is applied to ring 8|, making a partial turn from the zero or starting position. When relay D is energized the ring 9| is rotated to complete the cycle of operation and to restore the apparatus to the starting position for another operation.

When relay D is energized a circuit is established through contact finger 35I and wire 356, to contact finger 351, engaging the disc I39. This contact finger 351 engages only the projection 359 of band 353 which has been moved under this contact finger by the previous hali' revolution of the feed roller 26. This, continues a circuit through band 359, contact finger 32I and wire 322a to magnet I36, which brings the frictional drive of the platen, as rotated by the en-.-

gagement of clutch H to rotate the roller 26 for the second half revolution, thus restoring this roller to where the ledge I99, Fig. 8, is in position to engage the next sheet oi paper. The roller 26 makes two half turns in one cycle oi! operation of the mechanism.

The detector relay 354 is operated by circuit 36 I, controlled by the light valve or photo electric cell I25 and amplifier 362 andby a second light valve I25 and amplifier 363 to the energy wire B. The relay is controlled in multiple circuit by both of the light valves so that unless the paper sheet I95 shuts oil the light through both the openings I22 and I23, relay 354 will be held energized and the circuit for the operation of magnet I36 by relay P will be interrupted until the paper is properly adjusted, that is, the paper will not be tating the platen at the reduced speed until a new sheet of paper is located in the. writing position. If automatic repeating is not required, the switch 349 is connected to the manually operated push button 350 by which the operator circuit to energize relay P. i The line control The automatic control obtained by the numberof lines that are to be written may be adjusted to operate for a different nu'mberot lines at each writing position and with any line spacing desired, for instance, in the first writing establishes the position the control may not become eifective until three lines have been written, after which the platen is operated to place the paper in the second writing position, and in this position one line only may be all that is needed, after which conditions prevailing at one writing location tothe new conditions prevailing at the next writing location. The'writing positions are set up automatically but the line spacing is manually operated at each position.

The wheel 94 is provided with three rows of contacts, Ia, Ib, Ic, which engage the contact finger 369, the outer row Ia has a contact for each step of the wheel, the second row Ib has a contact for each second step of the wheel and the third row ie has a contact for each third step of the wheel. The first row connects by wire 3" to contact 312 of the change-over relay C. The second row connects by wire 313 to contact 314 and the third or innerrow connects by wire 315 to contact 316. When the changeover relay 0 is deenergized these wires are in circuit with a group of switches 311, marked a, b and c, and when the relay C is energized these wires connect to another group of switches 319, marked a, b and c. When C is deenergized and switch 311a is closed the outer row of contacts are in circuit and when switch 3110 is closed the inner row oi contacts are in circuit. When relay C is energized and switch 318a is closed the outer row of. contacts are in circuit, when switch 3191; is closed the second row of contacts are in circuit andwhen 319c-is closed the inner rows are in circuit. The switches 311 and 319 connect to the wire 425 which receives energy through contact 426 when magnet 394 is deenergized. i

' The contact finger 369, by wire 316, connects to relay T and when it engages anv energized contact, relay T is energized; at other times relay T is deenergized. When relay C is deenergized, switch 393'closed and switch 392 open, a circuit is established through contact 394 of relay T, wire 395, contact 396 of relay 0, switch 399. wire 391.contact 399 oi. relay S deenergized, and wire 335 to energizerelay D for completing the cycle of operation. when relay T is energized and relay C is energized, the previous circuit is interrupted at 396 and another circuit is established on'wires 332 and 323 to energize relay S for the second movement of the platen;

When the system is to opera-teto a second writing position the switch 398 is opened and the switch 382 is closed so that when the relay T is energized a circuit is established through contact .390, wire 39| and switch 392 to pick-up relay C; and a holding circuit is established for this relay through contact 393 and wire' 3| 6 to contact fingers 3i 4 which are bridged by the contact band 3I5 on disc 99 in the second position so that when relay C is thus energized it remains energized and changes over the system. A circuit is established at the same time from wire 395, through contact 396, wire 332, wire 323 to energize relay S. After relay S is energized it operates the platen according to the position of disc 99, but once the circuit is interrupted at contact fingers 33I there is no further movement of the platen even ii relay-S should afterwards he energized.

The number of lines to be written in the first location being known, a corresponding switch a,

b or c of the group 311 is closed, say switch,o.

is closed and the other switches are open, then the first line is written without any change in the carriage, but in returning the carriage to write the second line the wheel 94 is moved one step, and in returning the carriage after writing the second line, wheel 94 is moved the second step, and in returning the carriage afterwritting the third and last line, the wheel 94 is moved energized.

If a second writing position is required, say of two lines, then switch I) of group 318 is closed while the other switches remain open and switch 332 is closed and switch 388 is opened. 'In this position, as soon as the carriage has been restored at the end of the first writing, relay T is energized which energizes relay C and the contact band M on disc 90 being now positioned to bridge the contact fingers 3, the circuit is established through wire M6 to hold relay C in the energized position for the remainder of the operation. Thus, in the first operation, relay C remains deenergized and establishes a line control by the switches in group 311 until the first writing is completed. The final movement of the carriage energizes the change-over relay for the new condition of writing at the next location.

When relay T is energized again after the second writing operation a circuit is established through 384 and 386 to energize relay S but this circuit does not affect the movement of the platen as it is interrupted at the contact fingers 33! which have rotated the platen to disengage theband 328a from 331 and to bridge the contacts 321 by the band 330. In this second writing position, therefore, with relay C energized, the circuit is established by relay T energized through contact 3", wire 385, contact 386, wire 332. wire 323, contact fingers 321, wire 33, contact 390 of relay 8, which is now energized by wire 323, to wire 335 at the second locations are the same, the system will automatically adjust itself for repeating operations; but, if the number of lines in the second location are diiferent from those in the first location, then the stepping wheel would get out of step in each cycle of operation and in order to prevent this the stepping wheel is automatically restored to a neutral or starting position of which four pomtions are shown in the drawings. 'Ihisis obtained by the magnets 394 and 394a rotating the four pole rotor 333 with the poles 398 between these magnets. This rotor is mounted on the axis Ii of the stepping wheel 94 and when the magnets are energized the poles are rotated into alignment with the magnets. These magnets are controlled by wire 395, and by contact 396 of relay P, by contact 331 of relay S so that when plied mechanically.

either relays P or S are energized to move the platen to a new writing position the stepping wheel is synchronized at the same time.

.The paper feed roller operates with the discharge of the paper from the platen and is con- .trolled by a circuit established through contact ill of relay D, wire 2, contact finger 4, projection 3, band 5 on disc I80, to contact finger H9 and wire 4" to the clutch magnet i5l, As soon as the initial movement of the disc has been made to remove the insulation M6 and bridge fingers H8, M9. by band 5, a circuit is established for operating the clutch magnet ISI for a single complete revolution.

The restoring apparatus 393 for wheel 94 is intended to complete its operation before the platen has completed its movement and deenergized relay P or relay S. Should, however, the wheel 94 be restored to the neutral position before the platen movement is completed, it cannot cause improper operation of the system as the energy for relay T is cut ofi at 426 during this operation. When restored to the neutral position from which any of the steps may be started, the finger 369 rests between the radial row of contacts on each band, on lines 398a and the next contact on the outer row so as to leave the circuit open until the first movement of the carriage completes the initial step and connects 369 with the next contact on the 'outer row. The teeth engaging roller 91 in this position are shaped .to permit this movement.

The electric control enables the apparatus to be condensed and the use of stick relays in con trolling the rotation of the platen gives results that would be complicated and involved if ap- It should, however, be understood that a system of cams could be used for operating the clutches for the paper take-up and operating the friction drive for the feed roller. The stop fingers and engaging rollers in Fig. 20 could also be operated by a cam movement. It is apparent that the apparatus for each specific feature may be used in a generic sense as well as in the combination shown. The paper has been referred toas a sheet of paper which is understood to include manifold sheets that are commonly used in making several copies on the typewriter.

An application was filed on August 6, 1934, Serial No. 738,609 now Patent 2,028,813, January 28, 1936, by Robert Stuart, one of the applicants in the present case, relating to a machine for securing part of the results disclosed in this application by a mechanism that is entirely mechanical in its operation.

Having thus described our invention, we claim:

1. A system for delivering paper sheets from a stack to printing machines comprising a fixed support for the paper, a conveyor for delivering the paper, a lifting drum for lifting the sheet from the stack to the conveyor, 9. pivoted frame for said lifting drum and means regulated by the height of the paper in the stack supporting said drum to follow the paper as it is used and to enable the paper to be taken up by the drum from the entire stack.

2. A system for delivering paper sheets from a stack to printing machines comprising a lifting device arranged to engage the top sheet of the stack and move it forward to the printing machine, a Venturi nozzle maintaining a suction for said lifting device and a pipe for maintaining an air str am through said Venturi nozzle when the sheet is to be lifted and delivering said air stream upon the paper stack.

a 3. A system for delivering paper sheets from a stack to printingmachines comprising a lifting device arranged to engage the stop sheet of the printedto said roller, line spacing means, manually operated for said roller, power operated means for automatically rotating said roller to position the paper for'printing and power operated means for rotating said roller at a higher speed than the positioning speed to discharge the paper after printing said power operated means for discharging the paper controlled by said line spacing means. Y s

5. A system for printing comprising a platen roller and means for feeding the paper to be printed to said roller, line spacing meansfor said roller, power operated means for automatically rotating said roller toa plurality of printing positions of the paper independently of said line spacing means, and power operated means for rotating said roller at a higher speed than the positioning speed to discharge the paper after printing. v

6. A system for printing comprising a platen roller, a line spacer and means for feeding the paper to be printed to said roller, means controlled by the rotation of said roller for automatically rotating said roller to position the paper for printing and means controlled by the line spacer for automatically rotating said roller to change the paper to a new writing position after a predetermined number of lines have been written.

'7. A system for printing comprising a platen roller, a line spacer and means for feeding the paper to be printed to said roller, means controlled by the rotation of said roller for automatically positioning the paper for writing a predetermined number of lines at a first location,

means for automaticallyrotating said roller to change the writing position of the paper for writing a predetermined number of lines at a second location and means controlled by the line spacer for discharging the paper from the machine after the number of lines at the second location are completed.

8. A system for printing comprising a platen roller and means for feeding the paper to be printed to said roller, means controlled by the rw tation of said roller for rotatingsaid roller for a cycle of operation, additional means controlled by the rotation of said roller for rotating said' roller to position the paper in a predetermined printing position within the cycle of operation and means for completing the cycle'of operation after a predetermined number of lines have been written.

9. A system for printing comprising a; platen roller and a feed rollerifor feeding paper to the platen roller to be printed, a ledge on said feed roller for positioning the" paper, a cam-on said feed roller engaging the paper for feeding purposes and means for rotating said feed roller a first time to feed the paper and rotating said roller a second time to position the paperifor each sheet of paper fed to the platen.

10. A system for printing comprising-wplaten I roller and a feed roller for feeding paper to the platen roller to be printed, a ledge on said feed roller for positioning the paper, a cam on said feed roller engaging the paper for feeding purposes, and means connecting said roller with said platen for intermittently rotating said roller to feed the paper to the platen and to position the paper before feeding to the platen.

11. In a printing system, a platen roller, means for feeding paper to said platen roller to be printed and means for aligning said paper with said platen comprising a pair of spaced light sensitive cells placed in the path of an edge of the paper when in the aligned position and means for preventing the operation of the feeding means when either, or both, of said light cells are ing a conveyor, a paper tray for a stack of paper,

means for taking up said paper ,one sheet at a time and placing said sheet on the conveyor, motor operated means for elevating said tray, a

'light bulb on said tray, means for moving said bulb vertically by the stack of paper, a light cell on a fixed location, said paper stack being located between said light bulb and said light cell to shut oi! the light when the height of the paper is normal and means for operating said motor to elevate the tray when the light to said cell is not shut oif.

14. A system for delivering and placing paper sheets on the platen of a typewriter in a predetermined position, comprising a paper lift for the sheet, a conveyor receiving the sheet, a feed roller positioning the sheet and delivering it to the platen, means for automatically rotating the platen to a plurality of predetermined writing positions for writing a plurality of lines in each position and. means for automatically rotating the platen to discharge the paper when the writing is completed. I

15. A. system for delivering and placing paper sheets on the platen of a typewriter in apredetermined position comprising a conveyor for the sheet, a feed roller receiving the sheet. from the conveyor, aligning said sheet and delivering it to the platen, means initiated by the rotation ofv the platen for rotating the platen to position the sheet and means controlling the further rdtation of the platen by the movement of the typewriter mined number of movements of the carriage for rotating the platen to a second position and means controlled by a predetermined number,

of movements of the typewriter carriage for caus ing further rotation of the platen.

17. A system-for rotatingthe platen of a type-' writer to position the paper thereon, comprising- "a motor, spur of independent'gears of different gear ratio connecting said motor with the,

,platen, amagnetically operated clutch for each clutches for the predetermined rotation of said platen by said motor. 5 18. A system for rotating the platen of a typewriter to position the paper thereon, comprising a motor, a gear and a clutch connecting said motor with said platen, a line spacer for the platen, a magnet for operating said clutch, a circuit controller operated by the rotation of said platen and a stickrelay/controlling said clutch, having a holding circuit controlled by said circuit controller and having a pick up circuit controlled by the line spacer. 19. A system for rotating the platen of a typewriter to position the paper thereon, comprising a circuit controller connected to said platen to make a single revolution for a plurality of turns of the platen and a second circuit controller rotating with said platen, a motor, a gear with a clutch connecting said motor with said platen, a second gear and clutch connecting said motor with said platen, a magnet operating the first clutch and controlled by said first named circuit controller and a magnet operating the second clutch and controlled by the second circuit controller.

20. A system for delivering and placing sheets of paper on the platen of a typewriter, comprising a paper take-up, a magnetic clutch controlling said take-up, a feed roller for delivering the paper to the platen, a magnet controlling the rotation of said feed roller and controlled by said feed with said platen through a magnetic clutch and means for controlling the operation of said paper a sheet of paper in writing position on said platen, toremove the sheet when the writing is completed and to continue the operation.

21. A mechanism for operating the platen roller of a typewriter with a movable carriage having a shaft for said roller, a motor, a gear mechanism operatively connecting said motor and shaft, a plate fixed relative to said carriage, means for detachably securing said mechanism to said plate, and means including a spline operatively connect ing said shaft with said mechanism. a

22. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism having gears of different ratio, a flexible shaft operatively connecting said motor with said mechanism, means shaft to rotate said shaft by said gears at different speeds. relative to the speed of said motor effective gear ratio of said mechanism.

23. A mechanism for operating the platen' roller of a typewriter comprising a shaft for said roller, 8. motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, a gear on said roller shaft, a pair of gears of different gear ratio connecting said drive shaft with said roller shaft and means for selectively making either of said gears effective at a time to drive said platen shaft from said drive shaft.

24. A mechanism for operating the platenroller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a'drive shaft in said mechanism operated by said motor, a gear on said roller shaft, a pair of gears of different gear ratio connected with'said roller shaft and a clutch for each gear operatively connecting the gear with the drive shaft.

of said gears and means for operating said a roller, a motor, a gear connectingsaid motor' take-up, said feed roller and said platen to place operatively connecting said mechanism with said and electrically operated means for selecting the 25. A mechanism for operating the platen roller of a typewriter mounted on a carriage with a shaft for said roller, a mechanism separate from the typewriter comprising a motor, a gear mechanism, a drive shaft operated by a motor, means including a clutch connecting said drive shaft with said roller shaft, and a magnet controlling said clutch, a disc operatively connected with said roller shaft to rotate at a lower speed than said roller shaft and a circuit controlling member engaging said disc and controlling the circuit of the magnet,

26. A mechanism for operating the platen rollerof a typewriter mounted on a carriage havingya shaft for said roller, a mechanism separated from the typewriter comprising a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a clutch connecting said drive shaft with said roller shaft, a magnet controlling said clutch, a pair of discs operatively connected with said roller shaft to rotate with said shaft and circuit controlling members engaging said discs and controlling the circuit of said magnet.

27. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a pair of clutches operatively connecting said drive shaft with said roller shaft, a magnet for each clutch controlling the clutch, a disc operatively connected with 'said roller shaft, a contact member carried by said disc and contact fingers engaging said contact member and arranged with the disc in one position to control a circuit to energize one of said clutch magnets and to control another circuit to deenergize the other clutch magnet.

28. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a pair of clutches operatively connecting said drive shaft with said roller shaft, a magnet for each clutch controlling the clutch, a disc operatively connected with said roller shaft to rotate at a lower speed than said roller shaft, a contact member carried by said disc and contact fingers engaging said contact member and con trolling a circuit to energize one of said clutch magnets until said disc has completed a revolution and closing a circuit to energize the other clutch magnet when said disc has completed the revolution.

i 29. A'mechanism for operating the platen roller of a typewriter having a carriage with a shaft for said roller, a drive mechanism comprising a motor, a gear mechanism, a drive shaft insaid mechanism operated by said motor, means including a clutch connecting said drive shaft with said roller shaft, and a magnet controlling said clutch, a disc operatively connected to rotate with said'platen, means for manually adjusting the position of said disc and a circuit controlling member engaging said disc and controlling the circuit of said magnet.

30. A mechanism for operating the platen roller of a typewriter having a carriage with a shaft for said roller, a drive mechanism comprising a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a clutch connecting said drive shaft with said roller shaft, and a magnet controlling said clutch, a pair of discs operatively connected to rotate with said platen, means for manually adsaid mechanism operated by said motor, means ineluding a clutch connecting said drive shaftwith said roller shaft, a magnet controlling said clutch, a pair of discs operatively connected to rotate with said platen, means for manually adjusting the position of said discs relative to each other, a circuit controlling member carried by one disc for controlling the circuit of said magnet to rotate the platen to a first position and a circuit controlling member carried by the other disc controlling the cir uit of said magnet to rotate the platen to a s end position.

32. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a first clutch operated by a magnet connecting said drive with said roller shaft, means including a second clutch operated by a second magnet connecting said drive with said roller shaft, a first disc connected to rotate with said platen, means for manually adjusting the position of said disc, a second disc connected to rotate with said platen, a circuit controlling member carried by said first disc controlling the circuit of said first magnet and a circuit controlling member carried by said second disc controlling the circuit of said second magnet.

33. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a first clutch operated by a magnet connecting said drive with saidroller shaft, means including a second clutch operated by a second magnet connecting said drive with said roller shaft, a first disc connected to rotate with said platen, means for manually adjusting the position of said disc, 9. second disc connected to rotate with said-platen, a circuit controlling member carried by the first disc controlling the circuit of said first magnet to rotate the platen from a starting position a predetermined dis tance and a circuit controlling member carried by said second disc controlling the circuit of the second magnet to rotatethe platen to the starting position.

34. A mechanism for operating the platen roller of a typewriter comprising a shaft for said including a first clutch operated by a magnet connecting said drive, with said roller shaft,

means including a second clutch operated by a second magnet connecting said drive with said roller shaft, a first disc connected to rotate with said platen, means for manually adjusting the position of said disc, 9. second disc connected to rotate with said platen but at a slower speed than said platen, a circuit controlling member carried by the first disc controlling the circuit of said first magnet to rotate the platen from a starting position a predetermined distance and a circuit controlling member carried by said second disc controlling the circuit of the second magnet to restore the platen to the starting position.

35. A mechanism for operating the platen roller of a typewriter comprising a shaft for said roller, 9. motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a clutch operated by a magnet connecting said drive with said roller shaft, a

carriage for said platen, a circuit controller op-' erated by the movement of said carriage in its extreme position and a circuit controlled by said circuit controller to energize said magnet to move said roller to a new position.

36. A mechanism for operating the platen roll er of a typewriter comprising a shaft for said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a. clutch operated by a magnet connecting said drive with said roller shaft, a carriage for said platen, a'stepping circuit controller operated by the movement of said carriage and a circuit established by a predetermined number of movements of said carriage through said circuit controller to energize said magnet to move said roller to a new position.-

37. A mechanism for operating the platen roller of a typewriter comprising a shaft for. said roller, a motor, a gear mechanism, a drive shaft in said mechanism operated by said motor, means including a clutch operated by a magnet connecting said drive with said roller shaft, a carriage for said platen, a stepping circuit controller operated by the movement of said carriage, means for establishing the circuit of said magnet after a predetermined number of movements of said carriage to move .said roller to a first position and means for establishing another circuit by said stepping circuit controller after a predetermined number of movements of the carriage with the roller in the first position to further move said roller.

38. A mechanism for operating the platen rollof movements of said carriage and said circuit controller operating said controlling means to rotate the roller to anew position. r I

39. A mechanism for operating the platen roller of a typewriter mounted on a carriage for letter spacing movements comprising a motor operated mechanism for rotating [said roller, means controlling the operation of said mechanism, a circuit controller adjusted to operate by a'predetermined number of movements of said carriage in one direction and said circuit controller operating said controlling means to rotate said roller to.a first position and by a predetermined number of movements of said carriage when the platen is in the first position operating said controlling means to rotate the roller to a second position.

40. A mechanism-for operating the platen roller of a typewriter mounted on a carriage for right and left movement comprising a motor operated mechanism for rotating said roller,

means controlling the operation of said mechanism, a circuit controller adjusted to operate by a predetermined number of movements of said carriage in one direction, said circuit controller operating said means to rotate said roller to the starting position.

engages the paper resting on the stop and delivers it to the platen roller.

42. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller located parallel to each other, means connecting the feed roller with the platen roller for intermittently rotating the feed roller with the platen and a cam on said feed roller engaging the paper to feed it to the platen and releasing the paper after the feed roller has made a predetermined movement.

43. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller located parallel to each other, means connecting the feed roller with the platen roller for intermittently rotating the feed roller with .cam and a second cam operated by the feed roller for bringing said clamping roller into the clamping position.

44. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller spaced in parallel relation, a friction roller engaging said platen roller and feed roller for rotating the feed roller to feed paper to the platen roller, a magnet for bringing said friction roller into engagement with said platen and feed rollers and means operated by the rotation of said feed roller controlling said magnet.

45. A mechanism for feeding paper to a typewriter platen comprising afeed roller and a platen roller, said feed roller feeclini. P per to said platen roller, a friction roller engaging said platen and feed rollers, a magnet for bringing said friction roller into operative engagement with said platen and feed rollers and a circuit controller operated by the rotation of said platen roller controlling the circuit of said magnet.

46. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller located in parallel relation, a paper guide for sheets of paper to pass a sheet under said feed roller, around said platen roller on the opposite side from the feed roller and discharge roller and friction means connecting the opposing faces of said rollers to rotate one roller by the rotation of the other.

. 4'1. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller located in parallel relation, a paper guide for sheets of paper to pass a sheet under said feed roller, around said platen roller on the opposite side from the feed roller and discharge over the feed roller, a carriage for said platen roller moving it ,longitudinally relative to the feed roller, a friction roller normally held clear of said platen roller and means for-bringing said friction roller into engagement with said platen roller and said feed roller to feed the paper to the platen roller.

48. A mechanism for feeding paper to a typewriter platen comprising a feed roller and a platen roller, said feed roller feeding the paper to the platen roller, means for automatically rotating said platen roller to place the paper in the writing position and means connected with the platen for rotating said feed roller for an initial movement, means for automatically discharging the paper from said platen and means connected with the platen for rotating the feed roller to the starting position as the paper is discharged from the platen.

49. A mechanism for feeding paper sheets to a platen comprising a feed roller for feeding the paper to the platen, stop means for holding the paper sheet in alignment on the feed roller, a light bulb, on one side of said feed roller, a light valve on the opposite side of said feed roller illuminated from said bulb through an aperture in said roller, said paper sheet intercepting said illumination when engaging said stops and means controlling the rotation of said feed roller by said light valve.

50. A mechanism for feeding paper sheets to a platen comprising a feed roller for feeding the paper to the platen, stop means for holding the paper sheet in alignment on the feed roller, a pair of spaced light bulbs on one side of said feed roller, a light valve opposite each of said bulbs and illuminated from said bulbs through apertures in said roller, said paper sheet intercepting said illumination when engaging said stops and means controlling the rotation of said feed roller by said light valves.

51. A mechanism for feeding paper sheets to a platen comprising a feed roller for feeding the paper to the platen stops for holding the paper in alignment on the feed roller, means including a magnet operativeiy connecting said feed roller with said platen to rotate the feed roller, a plurality of spaced light valves, means for illuminating said valves, means for shutting off said illumination by the paper sheet when in aligned position and means controlling the circuit of said magnet in parallel by said light valves.

52. A paper feeding mechanism for feedin from a stack of paper on a fixed support, com prising a pivoted frame, a rotating wheel mounted. on said frame above and clear of said paper stack. means for rotating said wheel, means for lowering said wheel to engage said paper in a predetermined position and suction means carried by said wheel engaging said paper to lift the top sheet of paper and carry it forward by the movement of the wheel.

53. A paper feeding mechanism for feeding from a stack of paper on a fixed support, comprising a pivoted frame, a rotating wheel mounted on said frame above and normally clear of said paper stack, a fan carried by said wheel for circulating air over the paper, suction means carried by said wheel and a cam for lowering said wheel to bring said suction means into engagement with the top sheet of said stack.

54. A paper feeding mechanism for feeding from a stack of paper, comprising rotating means intermittently engaging said paper, a pipe with an air stream mounted on said means and discharging the air streamupon the paper stack, a Venturi nozzle in said pipe and a vacuum pipe connected with said nozzle and engaging said paper. stack.

55. A paper feeding mechanism for feeding from a stack of paper, comprising means intermlttently engaging the top sheet of said stack, a pipe with an air stream mounted on said means. means for discharging said air stream on the paper stack, a Venturi nozzle in said pipe and a. vacuum pipe connected with said nozzle and ar ranged to engage the top sheet of the stack, by the movement of said means.

58. A paper feeding and printing mechanism comprising a pair of rollers, one of said rollers being mounted on a carriage and being movable longitudinally relative to the other, means for rotating one of said rollers, a friction roller engaging the opposing faces of said rollers so that

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