US2000649A - Pin feed platen roll - Google Patents

Description

y 1935- J. Q. SHERMAN 2,000,649

P IN FEED PLATEN ROLL Filed June 8, 1931 5 Sheets-Sheet l NVENTOR.

jTTORNEYS.

y 7, 5- J. Q. SHERMAN 2,000,649

PIN FEED PLATEN ROLL Filed June 8, 1931 3 Sheets-Sheet 2 i /2- ENTOIZJIVV.

. ATTORNEYS.

M y 1935- 1 J. Q. SHERMAN 2,000,649

PIN FEED PLATEN ROLL Fi J1me 1951 3 Sheets-Sheet 3 P I INVENTOR. B

Patented May. 7, 1935 g 2,000,649 PIN FEED PLATEN non.

John Q. Sherman, Dayton, Ohio, assignor to The Standard Register Company Application June 8, 1931, Serial No. 542,855 R S S U 25 Claims. (Cl. 197-433) This invention relates to writing machines, and typewriters wherein the record and manifolding more particularly to paper feeding means for material circumferentially conform to the platen feeding superposed record sheets and interleaved roll, whereby they will not only be cheap and carbon sheets circumferentially about acylindrleconomical in construction, but will be more cal platen, and maintaining such sheets in accuefficient in use, automatic in action, uniform in 5 rate registry at the writing line. operation, of sturdy construction and unlikely to The use of continuous stationery wherein a sucget out of repair. cession of printed writing forms are detachably A further object of the invention is to provide connected end to end in continuous supply strips for automatic adjustment of superposed maniwhich are superposed one upon another and infolding strips as they travel about a platen roll, 10

terleaved with continuous strips of 'one time to a Co de ab a of which y conformcarbon material for manifolding purposes has be- A further obj c 0f e invention is to enable come quite common. the feeding of a large number of superposed It is generally recognized that however careapertured strips in accurate registry at the writfully and accurately such strips may be printed, ins i the apertures of which are Ofiset rela- 15 when superposed one upon another they will not tive to each other due to the travel of the strips register throughout, but require a slight degree about the platen roll in paths of different of relative adjustment simultaneously with their diameter. feeding movement to maintain their registry at A further object of the invention is to provide the writing position. means for uniformly and smoothly stripping the 20 The ordinary friction feed typewriter mechae ga ed strips fro the feeding p W t the nism will not maintain the registry of such supernecessity of Special Stripping devices, and Withposed forms during the feeding operation. out strain upon or disturbance of the uniform The present invention pertains to the provision movement of the strip of retractable feeding pins in the periphery of a A further object of the invention is to provide 25 platen roll which, as the roll rotates, are autopin wh feeding means w i l su ssfu y matically extended and retracted in sequence feed punched carbon sheets interleaved between whereby the punched manifolding strips will be the record sheets without undue strain thereon, engaged by the pins only at the writing line or and without tearing or other mutilation, and

closely adjacent thereto and will be automatically which W l automatically a a the t y stripped from the pins by withdrawal of the latter of the carbon sheets with over and under-lyi without strain or disturbance after passing the record sheets. writing position. A further object of the invention is to provide The superposed strips are thus left free to adretractable feeding pins which will be automatijust relative to each other as they approach the cally extended and retracted as the platen roll is writing position, and punched carbon material rotated whereby the pins will engage with the may be successfully fed without undue strain, and punched pape O y C y adj e t to the transverse division lines of the carbon material writing line and wherein the pins will be recanbe maintained in accurate registry with those tracted when passing adjacent parts of the 40 of the record strips at the tear off point. mechanism and hence avoid interference there- This construction enables the substitution of with.

the pin feed platen roll in standard types of type- A further object of the invention is to prowriters as the feeding pins, being subject to revide a pin feed platen roll which can be readily traction about the roll except adjacent to the and easily substituted for the usual platen roll of writing line, avoid interference with the usual standard typewriting machines.

friction or pressure roll and other parts of the A further object of the invention is to provide machine adjacent to the platen roll. control means for the retractable feeding pins Furthermore in the present construction means whereby the pins may be retracted at the writing is provided for retracting the feeding pins at the point and adjacent thereto, or the protruding r writing line at will and thus enabling the typepins shifted to an inoperative portion of the roll writer to be used in the ordinary manner merely area wherein they will not engage with the paper as a friction feed mechanism. supply and thus afiord a smooth working area of The object of the invention is to simplify the the platen for the usual friction feed operation construction as well as the means and mode of and enabling the use of unpunched paper upon operation of pin wheel feed devices as applied to the same platen roll. 0

A further object of the invention is to automatically prevent the operation of the friction feed mechanism while the pins are feeding the paper.

With the above primary and other incidental objects in view, as will more fully appear in the specification, the invention consists of the features of construction, the parts and combinations thereof and the mode of operation, or their equivalents, as hereinafter described and set forth in the claims.

Referring to the accompanying drawings wherein is shown the preferred, but obviously not necessarily, the only form of the embodiments of the invention, Fig. l is a perspective view of the traveling carriage ofj a popular type of writing machine in which the pin feed platen, forming the subject matter hereof, has been substituted for the standard platen roll. Fig. 2 is a side elevation of the platen roll removed from the typewriter. Fig. 3 is a longitudinal sectional view of the pin feed platen roll. Fig. 4 is a transverse sectional view through the typewriter carriage showing the parts adjusted for pin feed operation. Fig. 5 is a similar view wherein the parts are shown relatively positioned for friction feed operation. Fig. 6 is a transverse sectional view of the platen roll. Fig. '7 is a detail view of the actuating cam removed from the platen roll. Fig. 8 is a detail face view of the platen roll head showing the pin groove for guiding the pins radially as they travel about the cam.

Figs. 9 and 10 are detail views of the alternating mechanism for friction and pin feed operation. Fig. 11 is a detail view of a modification of the pin adjusting means. Fig. 12 is a detail view of a pin. Fig. 13 is afurther detail view. Figs. 14 to 16 inclusive show detailed views of the platen control mechanism.

Like parts are indicated by similar characters of reference throughout the several views.

While the platen roll, forming the subject matter hereof, has been illustrated in the drawings as embodied in a particular make of typewriter, it is to be understood that the present pin feed platen roll in proper size is interchangeable with the platen roll .of substantially all standard'makes of typewriters. To this end the present pin type platen roll simulates the proportions of standard typewriter rolls and employs the same mounting and occupies the same rela-- tion to the various operating parts of the typewriting machine, and i actuated by the usual pawl and ratchet mecha ism.

Referring to the accompanying drawings, I indicates an ordinary typewriter of which 2 is the reciprocatory platen carriage, and 3 is the platen oll revolubly mounted in the platen carriage in /the usual manner. -The platen roll comprises a supporting shaft 4 which is revolubly mounted in \iuitable bearings in the typewriter carriage from hich the original friction feed platen roll has been removed. The shaft 4 carries at each end the usual knobs 5 by which the platen may be manually rotated.

concentrically surrounding the shaft 4 is a cylinder 6 which may be rubber covered as is usual in typewriter constructions, but for manlfolding purposes for which the present feeding mechanism is especially adapted, such cylinder may be of metal to afford a harder abutment or contact surface for the impingement of the typewriter type. The cylinder 6 is fixedly connected to the shaft 4 for unison rotation therewith by a head I, pressed, brazed or otherwise secured .in one end'of the cylinder 8, and immovably mounted upon the shaft 4 by means of the set screw 8. Obviously other methods of mounting may be utilized. The cylinder 6 is further supported by additional heads'9-9 secured interiorly of the cylinder 6 and journaled upon a tubular slee"e Ill surrounding the supporting shaft 4. The sleeve I0 is preferably bushed at each end as at H to afford a journal bearing about the shaft 4.

The bearing bushing H of the tubular sleeve l0 upon the shaft 4, and the journal bearing of such sleeve l0 within the cylinder head 9 enable a rotary or rocking adjustment of the tubular sleeve l0 within the cylinder independently of the cylinder 6 and of the supporting shaft 4.

As illustrated in Fig. 8 the lateral faces of the cylinder head 9 are radially grooved at I2 to provide guide ways for reciprocatory feeding pins I3 mounted therein, which in their outward lineal travel are projected beyond the periphery of the cylinder 6 through circumferentially spaced holes l4 each of which registers with a guide groove l2 in a head 9. The heads 9 are preferably flanged at l5 and provided with holes registering with the guide groove l2 and with the cylinder holes [4 thus forming a bearing surface entirely around each pin.

The pins I4 are tapered or pointed at their outer extremities to facilitate their engagement in the punched holes or apertures of punched paper of the pin carrying heads 9. These box cams ll are pinned or otherwise fixedly secured to the lock sleeves Ill-40. As illustrated in Figs. 6 and 8 the cam ll engaging within the lateral notches l6 of the pins is of eccentric formation, and as the pins travel about such cam which is normally held stationary during the rotation of the cylinder, the pins are automatically reciprocated in their bearings in the heads 9. As the pins approach the extended portion I 1a of the cam in their rotary travel, the pointed ends of the pins are projected beyond the periphery of the cylinder 6 and into engagement with the paper webs ex tending about the platen roll. As the pins pass beyond the portion Ila, they are automatically retracted, and during their travel about the concentric portion I'lb of the cam, the pins are held in their inner position with their pointed ends retracted inwardly past the periphery of the cylinder and hence in inoperative relation and out of engagement with the punched or apertured paper. Normally the cam I1 is so positioned that its extended portion Ila agrees with the writing position so that the pins are projected outwardly as they approach the writing line and engage the apertured paper only at the writing line and closely adjacent thereto, the pins being retracted as they move beyond the writing position. The automatic retraction of the pins serves to strip the apertured paper from the pins without the necessity of a stripper plate or other means for dislodging the paper from the pins as ordinarily employed in pin wheel feed devices. In typewriter constructions the record paper conforms closely to the platen roll throughout a very considerable circumferential extent usually approximating one-half to two-thirds of the circumference of the platen roll. It is quite impractical if not impossible to feed apertured paper or record strips over a pin wheel feed device throughout such extended contact line wherein the paper would necessarily engage a very considerable number of pins. There are several reasons for this difficulty, one of which is that the difference between the points of the radially disposed pins is somewhat greater than between the bases of the pins at the peripheral line of the pin wheel or roller. Consequently the engaging points are spaced apart a greater distance than the holes of the paper which are spaced to agree with the bases of the pins at the peripheral line of the pin wheel or roller. Therefore there is a considerable tendency to tear or mutilate the holes in the paper and a great deal of friction develops. A further great difficulty arises from the fact that however carefully the paper may be printed and punched,

slight inaccuracies of spacing of the holes and resulting lack of registry of the apertures or holes of different strips necessarily occur. When the holes of superposed apertured strips are in registry at one point, they are quite likely to be out of registry at other points only a few holes distance away and are certain to be out of registry when each sheet travels an increased circumferential distance around a cylinder platen. Consequently although the art shows platen rolls for typewriters having pin studs projecting in circumferentially spaced relation entirely about the circumference of the roll or wheel, such constructions have been found impractical and commercially inoperative in typewriters of the usual construction. These difficulties as well as others incident to the use of the pin wheel feed devices for standard typewriting machines have been overcome in the present construction by providing for the progressive projection and retraction of the pins as they approach and recede from the writing line or position upon the platen roll. While the extended portion 11a of the cam may be made of any suitable extent, the preferable construction is one wherein only one or not more than two pins I3 are in fully extended position at one time while an additional pin is being projected outwardly and another pin being simultaneously retracted as is illustrated in Fig. 6. This progressive extension and retraction of the feeding pins is of material advantage and especially so in adapting a pin feed platen roll to standard typewriter construction. The ordinary typewriter construction approaches quite closely to the surface of the platen roll and does not provide the necessary clearance for the projecting ends of the pins, if the pins are to remain extended throughout their entire path of travel. In the present construction, however, the pins are automatically retracted after performing their feeding operation and before they reach any interfering part of the typewriter construction. They are held in such retracted position entirely within the circumference of the platen roll until they again approach the writing position when they are extended into operative engagement with the apertured paper. Thus the pins being retracted clear, without interference, all associated parts of the typewriter construction including the usual pressure roller employed in standard typewriters for friction feed operation. The pressure roller l 8 in the standard typewriter construction is adjustable toward and from the platen roll and when used for friction feeding of the paper supply it bears against the paper gripping the latter between the pressure roller l8 and the platen roll to advance the paper as the latter rotates. Although the pressure roller I8 is located in such position that there is no interference with the feeding pins l3 which are not projected beyond the periphery of the platen roll until they have passed beyond the position of the pressure roller It, the pressure roller I l is held out of contact with the paper and out of operative relation with the platen roll when the feeding pins l3 are employed. Pin wheel feed operation and friction feed operation are inconsistent with each other and, although there is no physical interference between the feeding pins and the pressure roller in the present construction, they can not be used simultaneously with any great degree .of success. One of the advantages of pin wheel feed devices is the capability of relatively adjusting the record strips to maintain accurate registry of printed forms and also registry of the tear-off lines of both the paper and the interleaved carbon material when used. If the superposed record strips are confined by the pressure roller it while being engaged and fed by the feeding pins IS, the superposed strips are not free for relative adjustment as succeeding holes of apertures are engaged by the pins and consequently the holes will not exactly register with each other or with the pins and the paper will be torn. The friction or tension imposed upon the strips by the pressure roller when engaged. with the paper defeats the dominant purpose of the feeding pins. Consequently when the pins H are employed for feeding and alining the superposed strips of material, the pressure roller I8 is disengaged from the platen roll and is held in an inoperative spaced relation with the platen roll by the adjusting means ordi-- narily provided on every standard typewriter. This adjusting means for the pressure roll is controlled by a finger lever IS on the carriage, which when depressed, moves the pressure roller l8 away from the platen roll and holds it in such position until the lever I9 is again elevated.

In order that the typewriter may be used in the usual manner, employing the pressure or friction roller l8 for frictionally feeding the paper about the platen roll, means is provided for shifting the feeding pins I3 to an inoperative position. It is for this purpose that the tubular sleeve II is journaled for rocking adjustment about the shaft 4 and within the cylinder heads 9. By rocking the tubular sleeve ID, the control cams l1 fixedly attached thereto are also turned relative to the platen roll to such position that the pins l3 are held retracted as they pass the entire area contacted by the paper strips which conform to the periphery of the roll and are projected beyond the periphery of the roll only in an inoperative position beyond the writing line where they clear the paper strips. Such inoperative position of the cam I1 is shown in Fig. 6. To rock the sleeve I and with it the cams I! to change the operative position of the pins relative to their path of travel, a manually operable lever arm 20 is provided at the end of the cylinder and secured to the extremity of the tubular sleeve Hi. This lever arm projects above the level of the platen roll and is easily accessible by the operator for swinging movement in a fore and aft direction thereby giving to the sleeve l0 and the cams II partial rotation. Any sort of detent means may be employed for locking the lever 20 in its adjusted position and so holding the cams ll immovable while the roll or cylinder rotates thereabout. In the drawings this detent has been illustrated as a' slotted bar If having therein notches in which a stud 22 upon the shift lever 20 is engageable to hold the cams IT in different positions of rocking adjustment.

In lieu of the lever locking detent there is illustrated in Figs. 9 and 10 a safety or fool proof means which prevent the simultaneous operative engagement of the friction feed rollers and the pins with the manifolding strips. In this construction the adjusting lever 20 is formed with a segment 23 which is positioned beneath a projecting stud or screw head 24 upon the crank arm 25 by which the friction rollers are shifted into and out of operative engagement with the platen. The segment 23 is of such length that it prevents the depression of the crank arm 25 until the segment 23 is moved to an extreme position in which it passes beyond the path of movement of the stud or screw head 24. The segment 23 is provided with a notch 26 in which engages a pivoted detent member 21 mounted upon one of the platen carriage rods 28 of the typewriter and drawn into engagement with the periphery of the segment 23 by a spring 29, one end of which connects with the detent 21 and the other end of which is connected to the segment 23. The detent 2! is pro-.

vided with a trip finger 30. When the adjusting lever 20 is drawn to a forward position thereby turning the actuating cam to such position that the feeding pins are projected beyond the periphery of the platen roll in proximate relation with the writing line, the detent 21 drops into the notch 2C and thereby locks the segment and adjusting lever 20 in their forward position. In this position of adjustment the segment 23 extending beneath the stud or screw head 24 in the crank arm 25 prevents adjustment of the friction rollers. However by merely touching the upstanding trip finger 3B of the detent, the latter is raised from the notch 26 and the spring 29 operates to throw the segment 23 rearwardly out of the path of the stud or screw head 24 thereby turning the actuating cams and causing the pins to be retracted at the writing position and to be projected only at an inoperative position. The movement of the segment 23 leaves the crank arm 25 free for oscillatory movement to adjust the friction rollers into operative relation with the platen.

While as before stated the platen roll herein described is intended to be interchangeable with the ordinary platen of any standard typewriter, when made of corresponding size, it is not limited to such substitute use but may be embodied in other writing machines such as automatic recording apparatus, billing machines, computing machines, autographic registers and various other installations employing continuous web paper supply. The radially disposed reciprocatory feeding pins are preferably, though not necessarily, arranged in two spaced rows. They may, however, 'comprise either a single series or multiple series and may be projected beyond the periphery of the roll at any circumferential point but preferably at a point in proximate relation to the writing line in which the type strike upon the paper about the platen at which point registration is required. By revolubly adjusting the position of the actuating cams about which the pins are carried by the rotation of the platen, the selected position in which the pins project may be changed at will. Being retractive at all points except the selected position, the pins avoid interference with adjacent structural parts of the typewriter. The construction permits the use of the ordinary friction feed device for advancing the paper to position in which it is engaged by the pins when loading the machine. It also provides an interlocking arrangement whereby the friction feed rollers are maintained in non-operating position when the feeding pins are engaged with the paper and vice versa. This construction enform which has heretofore been impractical. It

also enables the use of tabbed carbon paper to facilitate the separation of the interleaved carbon sheets from the record sheets after separation from the supply strips and further enables the use of interleaved punched carbon paper which is unglued or unattached to the printed form as has heretofore been the custom to prevent side shifting. The rectilinear movement of the feeding pins into and out of the platen has much greater alining capacity as to the number of copies of manifolding forms that can be properly fed and permits the use of platens of small diameter without the difficulties encountered in ordinary radial pin constructions wherein the pins enter and leave the feed holes in a lateral or swinging movement thus requiring greater clearance or variation of size between that of the holes and the pins. It further obviates the necessity for stripper devices since the pins are automatically withdrawn from the paper at the proper points.

In the present construction registration is attempted upon substantially a single line only, or in any event throughout only 'a very small portion of the circumferential arc of the platen roll. When it is attempted to feed punched paper circumferentially about a platen roll having fixed radial feeding pins, as distinguished from feeding the material tagentially past the pin wheel feed devices, the discrepancies occurring in the relative spacing of succeeding printed forms and between succeeding feeding apertures as well as the relative displacement of forms and apertures of difierent strips, due to the travel of succeeding strips through paths of increased diameter are distributed substantially equally between the number of pins engaged in the paper at the same time. Thus in such construction the multiple fixed pins, by their engagement with the strips, actually prevent proper registration of superposed forms and accurate alinement at the writing position is quite impossible.

In standard types of typewriters which depend solely upon friction feed means for advancing the record material, means is provided for releasing the friction feed devices to enable the paper or other record material to be adjusted relative to the platen roll to register the writing line upon the record sheet or upon a printed form with the writing position of the platen. Obviously such relative adjustment of punched forms adapted for pin wheel feed devices is quite impossible. The necessity, however, remains for properly alining or registering the writing lines of printed forms and the like with the point of impact of the typewriter type. In many standard makes of typewriters there are embodied line locating means which generally consist of some friction clutch or similar device for disconnecting the line spacing and feeding ratchet of the platen roll from the body of the roll or from other paper feeding devices which may be employed. In as much as it is quite impossible to shift the paper relative to the roll in a construction wherein rotary pin feed devices are employed the pins of which enter apertures in the record material, it is necessary to change or readjust the relative position of the pin carrying platen to that of the feeding ratchet in order that the typewritten impressions may appear in proper relation with lines upon the printed form.

As is illustrated in the detail view, Fig. 13, there is shown a friction clutch which adjustably connects the line spacing ratchet wheel 3| with the platen roll and comprises a male member 32 spring pressed into the female portion 33 of the clutch, the contacting surfaces being provided with friction material coating or with fine line knurling so that they may be'fixedly interengaged with each other in different positions of revoluble adjustment to maintain the selected relation of the ratchet wheel and platen roll. By releasing the friction clutch members 32 and 33 the pin carrying roll may be adjusted revolubly relative toand independent of the. line spacing ratchet 3|. be adjusted to proper registry with the impact point of the typewriter type.

A typical construction is illustrated in Figs. 13 to 16 inclusive wherein the male member 32 of the clutch is slidingly mounted upon the shaft of the platen roll and may be retracted against the tension of a helical spring 34 out of engagement with the female member 33 of the clutch. The female member 33 is fixedly connected with the ratchet wheel 3| and loosely journaled upon the platen roll shaft except for its connection therewith through the interengagement of the clutch members 32 and 33. The member 32 is provided with an enlargement or knob 35 having therein a slot 35 in which slidingly engages the key lug 31 on the collar 38. The latter is secured upon the platen roll shaft and serves to couple the clutch members therewith for unison rotation but permits axial sliding movement of the clutch member 32 into and out of engagement with the member 33. In Fig. 16 there are shown the actuating pawl 39 for operative engagement with the ratchet wheel 3| and also a detent 40 engaging with the ratchet wheel 3| to retain it in its adjusted position. This construction of the line adjusting means is herein shown and described for illustrative purposes only and does not, per se, form any part of the present invention except so far as it is inter-related with the operation of pin feed mechanism. In the modification disclosed in Fig. 1, the carrier 50 is carried by the carriage 2 through the arms 52 so that as the carriage 2 is actuated to and fro in the typewriter, the paper supply carrier 50 moves in unison therewith.

A means for holding the punched manifold paper webs in feeding position with the pins without the use of frictional feed has been disclosed in Fig. 1 and includes pivotally mounted arms 54 carried on a crossrod 56 that in operative position, as disclosed to the left of Fig. 1, has a curved surface 58 that follows the contour of the roll to hold the record material in contact with the pins.

In order that the punched paper may be supplied uniformly to the platen roll throughout the range of travel of the typewriter carriage, and to insure against such binding or straining of the supply material as would interfere with free movement of the paper onto and oif the feeding pins and the relative adjusting movement necessary for maintenance of proper registration, it is desirable that the supply of material be conducted to the platen roll over a suitable guide device as is shown in Fig. 1 which may be stationarily located in distantly spaced relation with the roll as may also be located the supply packet or roll of manifolding material. However, the preferable method of supplying material is to provide a traveling carrier operatively' cnnected with and actuated to and fro in unison with the platen carriage. Such traveling carrier 50 may be mounted independently of the type- This enables the lines of a printed form to writer, or may be supported directly upon the typewriter frame. Such traveling carrier constructions 50 are fully shown and described in copending applications, Serial No. 460,764 and Serial No. 519,488 to which reference may be had for detail description, such constructions forming no part of the present invention, per. se, except so far as it is related to the feeding operation of the present pin type platen roll and hereinafter claimed in combination therewith.

In the modification disclosed in Fig. 1, the carrier 50 is carried by the carriage 2 through the arms 52 so that as the carriage 2 is actuated to and fro in the typewriter, the paper supply carrier 50 moves in unison therewith. I

r A means for holding the punched manifold paper webs in feeding position with the pins without the use of frictional feed has been disclosed in Fig. 1 and includes pivotally mounted arms 54 carried on a cross rod 56 that in operative position, as disclosed to the left of Fig. 1, has a curved surface 53 that follows the contour of the roll to hold the record material in contact with the pins.

From the above description it will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportions, detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its ad-' 1. The combination with a platen roll for a writing machine wherein the record material provided with apertures is fed circumferentially about the roll, of a series of reciprocatory pins mounted radially in said roll and means for automatically projecting the pins beyond the periphery of the roll and positively. retracting the pins successively as the roll rotates whereby the pins enter the apertures in a direction coincident with the radius of curvature of the record material.

2. A platen roll for a writing machine, means for feeding the record material circumferentially about the roll, including a plurality of retractable feeding pins for engagement with record material, and means for positively reciprocating the pins rotating in unison with the rotation of the roll in a path coincident with the radius of curvature, of the record material.

3. A platen roll for typewriting machines, and rectilinearly retractable feeding and aligning means carried by the roll having positive engagement with recording material to feed it circumferentially around said platen roll and to align the record material, and actuating means therefor by which the feeding means is rendered operable at a point of the platen adjacent the writing line only, said feeding means retracting along a path coincident with the radius of curvature of the record material.

4. A platen roll for typewriting machines and radially extensible and retractable tapering feeding pins carried by said roll, said pins projecting beyond the periphery thereof adjacent to the writing line only for engagement with record material to feed the same circumferentially disposed about the platen roll and to align the record material.

5. A platen roll for a writing machine, a series of feeding and aligning pins carried thereby and movable radially relative to the roll into and out of engagement with record material to feed the same circumferentially about the roll and to align the record material when in writing position, and means for positively retracting the feeding pins to strip the record material therefrom. i

6. A platen roll for a writing machine, and a plurality of reciprocatory feeding and aligning pins mounted therein and actuating means for positively advancing and retracting the pins responsive to the rotation of the platen roll.

7. A platen roll for a writing machine, and 'a plurality of reciprocatory feeding and aligning pins mounted therein and actuating means for positively advancing said pins into operative engagement with record material disposed circumferentially about the roll, and means by which the pins are positively retracted out of engagement with the record material to strip the material therefrom responsive to the rotation of the roll.

8. A platen roll for a typewriting machine wherein the record material follows a curvilinear path when passing therethrough, a plurality of groups of strip feeding pins mounted therein for reciprocatory motion, and a cam for each group with which the pins thereof continuously engage and about which they are caused to travel by the rotation of the platen by which the pins are progressively advanced and retracted responsive to the rotation of the platen roll.

9. A platen roll for a typewriting machine wherein the record material follows a curvilinear path when passing therethrough, a plurality of groups of strip feeding pins mounted therein for reciprocatory motion, and a cam for each group with which the pins thereof continuously engage and about which they are caused to travel by the rotation of the platen, said cam operating to alternately advance and retract each pin of its group responsive to the rotation of the platen roll.

10. The combination with a platen roll for a typewriting machine, of reciprocatory pin studs carried by the platen roll for feeding and aligning superposed webs of manifolding material circumferentially of the roll, and maintaining the webs of material in registry at the writing line, said pin studs being adapted to engage the webs of manifolding material for a portion only of that portion thereof which conforms to the contour of the platen roll.

11. A feeding device for an apertured web, including a carrier, a plurality of reciprocating feeding pins therein engageable in the apertures to feed the web, and. control means for positively retracting the pins to strip a portion of the web, still in contact with the carrier, from the feeding pins after it has passed the writing point.

12. A feeding device for an apertured web, including a rotary carrier about which the web is fed in circumferential relation, a plurality of retractable feeding pins upon the carrier progressively engageable in the apertures of the web for feeding the same, and positive actuating ing means for a supply of punched record material for maintaining the punchings thereof in position, the combination of a platen roll with feeding pins mounted therein for reciprocal motion into and out of feeding contact with the punched record material fed circumferentially about the platen roll, the axis of the pins being coincident with the radius of curvature of the record material when progressively engaging the same.

14. In a writing machine, a pin wheel feeding mechanism, including a plurality of groups of movable feeding pins for continuously and progressively advancing the writing material through the writing machine, and a cam for each group having a closed loop-like cam surface for positively controlling only the movement of its group of pins.

15. In a writing machine, a platen rotating about an axis, a pin wheel feeding mechanism associated with said platen, said pin wheel feeding mechanism including a plurality of movable pins for advancing the record material through the writing machine, a cam having a closed, looplike cam enclosing said axis for controlling the movement of the pins.

16. In a writing machine, a platen roll, means for feeding the paper circumferentially about said platen so that the record material is curved about the platen, characterized by tapering pins advancing into and retracting from apertures provided therefor in the record material to feed and align the same, the axis of the pins coinciding with the radius of curvature of the writing material when in contact therewith. 7

1'7. In a writing machine, a feed roll about which the record material is advanced circumferentially, characterized by tapering pins engaging the record material in contact with the roll, said pins being advanced and retracted in a path coinciding with the radius of curvature of the material engaged so as to prevent mutilation of the record material.

18. A platen roll for a writing machine, a series of tapering feeding and aligning pins carried thereby and movable radially relative to the roll, said pins loosely engaging apertures provided therefor in the record material to align and feed the same circumferentially about the roll, and means for retracting the feeding pins to withdraw the same from the record material.

19. A platen roll for a writing machine, and a plurality of reciprocatory tapering aligning and feeding pins mounted therein for loosely engaging apertures provided therefor in the record material advancing circumferentially about the roll,

and means for advancing and retracting the pins responsive to the rotation of the platen r011.

20. A platen roll for a writing machine, and a plurality of reciprocatory aligning and feeding pins mounted therein for loosely engaging apertures provided therefor in the record material, actuating means for advancing the pins into operative engagement with the record material disposed circumferentially about the platen roll, and means for retracting the pins out of engagement with the record material to strip the 75 material therefrom responsive to the rotation of the platen roll.

21. A feeding device for an apertured web including means for guiding the web through a curved path while advancing through the device, a carrier, a plurality of reciprocating tapering aligning and feeding pins therein loosely engageable in the apertures to align and feed the web, and control means for retracting the pins to strip a portion of same still in contact with the carrier from the pins after it has passed the writing point, said pins entering and retracting in a path coincident with the radius of curvature of the web.

22. In a writing machine, means for guiding writing material therethrough in an arcuate path of travel, a series of traveling feeding and aligning pins moving about an axis concentric with the arcuate path of the writing material and extending radially relative thereto, means for radially reciprocating the pins into and out of engagement in spaced holes in the writing material simultaneously with their travel about said axis for aligning superposed sheets of material and advancing them through their arcuate path of travel.

23. A platen roll for typewriting machines, feeding and aligning means carried by the platen roll having positive engagement with the record material to feed it circumterentially around said platen roll and to align the record material, and actuating means by which the feeding and aligning means extend in a path coincident with the radius of curvature when in engagement with the record material when passing through said circumierential path.

24. In a writing machine, a pin feeding device for feeding record material through a curvilinear path through the writing machine and means for actuating said pins to feed the record material, said means causing the axes of the pins to coincide with the radius of curvature of the record material when in engagement therewith, said pins having a rectilinear movement with respect to the record material when entering and leaving the same.

25. In a writing machine through which the record material advances through a curvilinear path, the combination of a plurality of pins for engaging the record material, said pins being actuated in a direction such that the axes of the portion of pins in engagement with the record material when advancing through the curvilinear path substantially coincides with the radius of curvature of the record material, said pins having a relative movement with respect to at least a portion of the record material passing along the curved path.

JOHN Q. SHERMAN.

CERTIFICATE OF CORRECTION.

Patent No. 2,000,649. May 7, 1935.

JOHN Q. SHERMAN.

it is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 6, first column, line 6-7, claim 4, strike out the word "disposed; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 18th day of June, A. D. 1935.

Leslie Frazer 7 (Seal) Acting Commissione of Paten CERTIFICATE OF CORRECTION.

Patent No. 2,000,649. May 7, 1935.

JOHN Q. SHERMAN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 6, first column, line 6-7, claim 4, strike out the word "disposed; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 18th day of June, A. D. 1935.

Leslie Frazer (Seal) Actim, Conunission of Paten

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