US2000651A - Pin feed platen roll - Google Patents

Description

May 7, 1935. J. Q. SHERMAN PIN FEED PLATBN ROLL 511911090. 7, 1933 3 Sheets-Sheet 1 May 7, 1935. I J. Q. SHERMAN I PIN FEED PLATEN ROLL s Sheets-Sheet 2 Filed Dec. 7, 1933 y 1935- J. O. SHERMAN 2,000,651

I PIN FEED PLATEN ROLL Filed Dec. 7, 1933 3 Sheets-Sheet 5 'A'QRNE Patented May 7; 1935 Application December 7, 1933, Serial No. 701,307 In .Great Britain July 22, 1933 7 64 Claims.

This invention relates to writing machines, and

' more particularly to paper feeding means for feeding superposed record sheets and interleaved carbon sheets circumferentially about a cylindrical platen, and maintaining such sheets in accurate registry at the writing line. This application is a continuation in part of my co-pendilrsiglapplication Serial No. 542.855 filedJune 8,

The use of continuous stationery wherein a succession of printed writing forms are detachably connected end to end in continuous supply strips which are superposed one upon another 1 and interleaved with continuous strips of "one time carbon material for manifolding purposes has become quite common.

It is generally recognized that however carefully and accurately such strips may be printed, when superposed one upon another they will not register throughout, but require a slightdegree of relative adjustment simultaneously with their feeding movement to maintain their registry at the writing position.

The ordinary friction feed typewriter mechanism will not'maintain the registry of such super posed forms during the feeding operation.

The present invention pertains to the provision of retracting feeding pins in the periphery of a platen roll which, as the roll rotates, are automatically extended and retracted in. sequence whereby the punched manifolding strips will be engaged by the pins only at the writing line or closely adjacent thereto and will be automatically stripped from the pins by withdrawal of the latter without strain or disturbance after passing the writing position.

The superposed strips are thus left free to adjust relative to each other as they approach the writing position, and punched carbon material may be successfully fed without undue strain, and transverse division linesof the carbon material can be maintained in accurateregistry with those of the record strips at the tear off" point.

. This construction enables the substitution of the pin feed platen roll in standard types of typewriters as the feeding pins, being subject to retraction about the: roll except adjacent to the writing line, avoid interference with the usual 'frictionor pressure roll and other parts of the machine adjacent to-the platen roll.

' Furthermore in the present construction means is provided for reizacting'the' feeding pins at the writing line at will and thus enabling the typewriter tobe used in the ordinary mannermerely as a friction feed mechanism.

The object of-the invention is to simplify the construction as well as the means-and mode of operation ofpin wheel feed devices as applied to typewriters wherein the record and manifolding material circumferentially conform to the platen roll, whereby they will not only be cheap and economical in construction, but will be more efllcient in use, automatic in action, uniform in operation, of sturdy construction and unlikely to get out of repair.

A further object of the invention is to provide for automatic adjustment of superposed manifolding strips as they travel about a platen roll, to a considerable arc of which they conform.

, A further object of the invention is to enable the feeding of a large number of superposed apertured strips in accurate registry at the writing line, the apertures of which are. offset relative to each other due to the travel of the strips about the platen roll in paths of different diameter.

. A further object of the invention is to providemeans'for uniformly and smoothly stripping the engaged strips from the feeding pins without the necessity of special stripping devices, and without strain upon or disturbance of the uniform movement of the strips.

A further object of the invention is to provide pin wheel feeding means which will successfully feed punched carbon sheets interleaved between the record sheets without unduestrain thereon, and without tearing or other mutilation, and which will automatically maintain theregistry of the carbon sheets with over andunder-lying record sheets.

A further object of the invention to provide retractable feeding pins which will be automatically extended and retracted as the platen roll is rotated whereby the pins will engage 'with the punched paper only at, or closely adjacent to the writing line and wherein the pins will be retracted when passing adjacent parts of the mechanism and hence avoid interference therewith.

A further" object of the invention is to provide a pin feed platen roll which can be readily and easily substituted for the usual platen roll of standard typewriting machins.

A further object of the invention is to provide cont whereb he pins may be retracted at the writing point and adjacent thereto, or the protruding pins shifted to an inoperative portion of the roll area. wherein they will not engage with the specification, the invention of the features of construction, the parts and combinameans for the retractable feeding pins tions 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,v the only form of the embodiments of the invention, Fig. l is a perspective view of the traveling carriage of 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 platenroll. 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 a further detail view. Figs. 14-16 inclusive show detailed views of the platen control mechanism.

Fig. 17 is a fragmentary end view with parts broken away showing the automatic control mechanism of the friction feed device.

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 relation to the various operating parts of the typewriting machine, and is actuated by the usual pawl and ratchet mech- .anism.

Referring to the accompanying .drawings, l indicates an ordinary typewriter of which 2 is the reciprocatory platen carriage, and 3 is the platen roll revolubly mounted in the platen carriage in the usual manner. The platen roll comprises a supporting shaft 4 which is revolubly mounted in suitable bearings in the typewriter carriage from which 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 coveredas is usual in typewriter constructions, but for manifolding 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 6, and immovably mounted upon the shaft 4 by means of the. set screw 9. Obviously other methods of mounting may be utilized. The cylinder 8. is further supported by additional heads 9-9 secured interiorly of the cylinder 6 and journaled upon a tubular sleeve I ll surrounding the supporting shaft 4. The sleeve I is preferably bushed at each end as at H to afford .a journalbearing about the shaft 4.

The bearing bushing I I of the tubular sleeve l0 upon the shaft 4, and the journal bearing of such sleeve Ill within the cylinder head 9 enables a rotary or rocking adjustment of the tubular sleeve [0 within the cylinder independently of the cyl- -inder 6 and of the supporting shaft 4.

As illustrated in Fig. 8 the lateral faces of the cylinder head 9 are radially grooved at l2 to provide guide ways for reciprocatory feeding pins l3 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 I2 in the head 9. The heads 9 are preferably flanged at l and provided with holes registering with the guide groove I 2 and with the cylinder holes I4 thus forming a bearing surface entirely around each pin.

The pins l4 are tapered or pointed at their outer extremities to facilitate their engagement in the punched holes or apertures of punched paper with which the present platen is to be employed. The pins are also provided with lateral notches It for engagement over the lateral flange of a box cam II. There is a box cam Il adjacent to each of the pin carrying heads 9. These box cams I! are pinned or otherwise fixedly secured to the lock sleeves l0l0. As illustrated in Figs. 6 and 8 the cam I'I 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 Ila 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 extending about the platen roll. As the pins pass beyond the portion Ha, they are automatically retrac ed, and during their travel about the concentric portion [1b 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 l'la 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 diillculty, one of which is that the diiference 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 dealo'f 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 difliculties 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 Ila of the cam may be made of any suitable extent, the preferable constructionis one wherein only one or not more than two pins [3 are in fully extended positionat 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 operationand before they reach any interfering partbf the typewriter construction. Theyare held in such retractive 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 apertuied 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 18 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 1 ",the pressure roller n is held out of contact with the paper and out of operative relation with the platen roll when the feeding pins 13 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 forms and also registry of the tear-oi! lines of both the paper and the interleaved carbon ma- 'terial when used. If the superposed record strips are confined by the pressure roller I! while being engaged and fed by the feeding pins IS, the superposed strips are not free for relative adjustment as succeeding holes or 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.

it in such position until the lever is is againelevated.

In order that the typewriter may be used in strips to maintain accurate registry of printed This adjusting means for the pres- I the usual manner, employing the pressure or friction roller II for frictionally feeding the paper about the platen roll, means is provided for shifting the feeding pins I! 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 8. By

rocking the tubular sleeve I0, the control cams ll fixedly attached thereto are also turned relative to the platen roll to such position that the pFns I3 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 I0 and with it the cams II to change the operative position of the pins relative to their path of travel, a manually operable lever arm 1| is provided at the end of the cylinder and secured to the extremity of the tubular sleeve II. 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 II and the cams l1 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 there,-

'about. In the drawings this detent hasbeen illustrated in Figs. 9 and 10 a safety or 001 proof means which prevents the simultaneous operative engagement of the friction feed rollers and the pins with the manifolding strips. In this construction the adjusting lever 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 21 is provided 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 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.

Whileas 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 revolublyadjusting 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 retracfor advancing the paper to position in which it is en aged 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 enables the use of interleaved carbon paper punched similarly to and of full width of the manifolding form 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 un-.

attached 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 difliculties 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 tangentially 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 suceeding 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, 1 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 materialto 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. Inasmuch as it is quite impossible to shift the paper relative to the roll in a con'structionwhemin rotary pin feed devices are employed the pins of which enter apertures in the record material, it is necessary to change or readjust the structions forming no part of the present invenrelative 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'3l 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 revolublyrelative to and independent of the line spacing ratchet 3|. This enables the lines of a printed form to be ad- J'usted 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 engagementwlth 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 36 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 interrelated with the operation of pin feed mechanism.

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 off 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 preterable method of supplying material is to provide a traveling carrier operatively connected with and actuated to and fro in unison with the platen carriage. Such traveling carrier may be mounted independently of the typewriter, or may be supported directly upon the typewriter frame. Su h traveling carrier 50 constructions are fullyshowri and described in copending applications, Serial No, 460,764 and Serial No. 519,488 to which reference may be had for detail description, such contion, per se, except so far as it is related to the feeding operation of the present pin type platen roll and hereinafter claimed in combinationtherewith.

.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 cross rod 56 that in operative pofltion 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.

The above described mechanism is shown in my co-pending application, Serial'No. 542,855, for a Pin feed platen roll, filed on June 8, 1931.

Referring to Fig. 17, another modification is shown of the safety or fool-proof means whichprevents the simultaneous operative engagement of friction feed rollers and with pins with the manifoiding strips. The tubular sleeve |l carries a cam sector ill having the full line position when the feeding pins are in operative position and having a dot-dash position when the pins are in inoperative position. This cam 63 when the pins are in operative position shifts the friction rollers l8 out of engagement with the platen. When this cam is rotated to dot-dash position the trio-- tion rollers are free to move into engagement with the platen. A pair of notches 64 cooperate with the detents 66 in holding the cam sector in either position, it being necessary to move the detent 63 out of engagement with the cam sector when shifting the pin feed mechanism from one position to the other.

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'zobviously 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 advantages.

While in order to comply with the statute the invention has been described in language more or less specific as to structural features, it is to carried by the roll, means for progressively extending and retracting the pins responsive to the rotation of theroll, and means for shifting the position of greatest projection'of the pins circumferentially of the roll..

2. A platen roll for a writing-machine, a phi rality of retractable feeding and aligning pins carried by the roll, means for progressively extending and retracting-the pins responsive to the rotation of the roll, and means for shifting the position of greatest projection of the pins toward and from the writing line upon said platen roll.

3. In a typewriting machine, a platen roll, a pin feed device for feeding a web of punched record material circumferentially about the roll comprising a plurality of' feeding and aligning pins mounted radially in said roll for reciprocatory motion and adjustablemeans operative upon rotation of the platen roll to project and retract said pins progressively whereby a portion only of the pins carried in that portion of the platen roll to which the record web conforms will be projected into engagement therewith.

4. A feeding device for a continuous strip or .strips of punched record material, including a rotary carrier, a plurality of reciprocatory feeding pins radially mounted in the carrier, and actuating means progressively projecting the pins outwardly and positively retracting the projected pins inwardly in sequence responsive to the rotation of the carrier, and control means for varying the points in the path of the rotary carrier at which the pins are projected and retracted.

5. A feeding device for feeding a continuous apertured strip or strips, including a rotary carrier, a plurality of reciprocatory feeding pins racontrol means for'progressively projecting the pins beyond the periphery of the, carrier into feeding engagement with the web as the pins approach a predetermined point in the travel of the carrier and for thereafter progressively and positively retracting the pins after passing such point and adjusting means for varying the position of such operative action of the pins.

7. In a feeding device for an apertured web,

including a rotary carrier about which the web is fed in circumferential relation,'a plurality of reciprocatory. feeding pins carried thereby, and control means for progressively projecting the pins beyond the periphery of the carrier, and retracting the pins responsive to the rotation of the roll, and an adjustable friction roll engageable with the web on the roll in the plane of rotation of the pins.

8. In a platen roll for writing machines, a series of movable feeding pins for operative engagement with punched record material to feed the same circumferentially about the roll, said pins being radially disposed about a common axis, actuating means for progressively advancing and retracting the pins radially responsive to the rotation of the platen roll, and manually operable adjusting means for circumferentially changing the position at which the pins are projected to their extreme position.

9. In a platen roll for writing machines, a series of movable feeding pins for operative engagement with punched record material to feed the same circumferentially about the roll, said pins being radially disposed about a common axis, actuating means for progressively advancing and retracting the pins radially responsive to the rotation of the platen roll, means for circumferentially changing the position at which the pins are projected to their extreme position, a friction roll operatively engageable with, the record material about the platen roll and control means permitting the operative engagement of the friction roll only when the fee eding pins are adjusted for projection to extreme degree in an inoperative position.

10. In a platen roll for writing machines, a series of radially movable feeding pins for operative engagement with punched record material to feed the same circumferentially about the roll, said pins being radially disposed about a common axis, actuating means for progressively advancing and retracting the pins rotating in unison with the rotation of the platen roll, means for circumferentially changing the position at which the pins are projected to their extreme position, a friction roller. operatively engageable with the record material upon the platen roll, the feeding pins and the friction roll being alternately adjustable to operative relation with the record material about the platen roll.

11. In a platen roll for writing machines, a series of movable feeding pins for operative engagement with punched record material to feed. the same circumferentially about the roll, said pins being radially disposed about a common axis, actuating means for progressively advancing and retracting the pins responsive to the rotation of the platen roll, means for circumferentially changing the position at which the pins are projected to their extreme position, a friction roll .operatively engageable with the record material about the platen roll and control means preventing the adjustment of the friction roll into operative relation until the projection point of the pins has been changed to inoperative position.

12. The combination with a platen roll for a writing machine, of a series of feeding pins engageable with punched record material fed circumferentially about the roll, adjustable means for rendering the feeding pins inoperative at the will of the operator, a friction feed means for the record material, means for rendering the friction feed means inoperative, and interlocking means wherebyonly one of said feeding means may be in operative engagement with the record material at a given time.

13. The combination with a platen roll for a writing machine, of a series of feeding pins engageable with punched record material to feed the same circumferentially about the roll, adjustable means for rendering the feeding pins inoperative at the will of the operator, a friction feed means for the record material, means for rendering the friction feed means inoperative, and alternating means for effecting alternate operative engagement of the respective feeding means with the record material.

I 14. Ihe combination with a platen for a writing machine, of a series of feeding pins associated therewith for operative engagement with punched record material fed over said platen, operating means for effecting progressive extension and retraction of the pins beyond the surface of the platen, and adjusting means for changing the position at which the pins are projected and retracted relative to the writing position upon said platen.

15. The combination with a platen for a writing machine, of a series offeeding pins associated therewith for operative engagement with punched reciprocatory feeding pins for operative engagement with punched record material to feed it over the platen, said pins being radially disposed about a common axis, actuating means for progressively projecting and positively retracting the pins beyond the surface of the platen in unison with the rotation of the series of pins, and adjusting means for changing the position at which the pins are projected and retracted relative to the platen.

17. A platen roll for a writing machine, a plurality of retractable feeding pins carried by the roll, means for holding punched manifolded paper webs in feeding position over the pins without frictional feed, means for progressively extending and positively retracting the pins in unison with the rotation of the roll, and means for shifting the position of greatest projection of the pins toward and from the writing line upon said platen.

18. In a feeding device for an apertured web, including a rotary carrier about which the webs are fed in circumferential relation, a plurality of reciprocatory feeding pins carried thereby, and control means for progressively projecting the pins beyond the periphery of the carrier, and retracting the pins in unison with the rotation of the carrier, and an adjustable friction roll engageable with the web on the carrier in the plane of rotation of the pins, and means preventing the interference of the pins and friction roll one with the other.

19. In a platen roll for writing machines, a series of movable feeding pins for operative engagement with punched record material to feed the same circumferentially around the roll, said pins being radially disposed about a common axis, actuating means for progressively advancing and retracting the pins to operating and nonoperatingpositions, a. friction roller operatively engageable with the record material uponthe platen, the feeding pins and friction roll being alternately adjustable to operative relation with the record material about the platen.

20. In a platen roll for writing machines, a series of movable feeding pins for operative engagement with punched record material to feed the same circumferentially about the roll. said pins being radially disposed about a common axis,

4 manually adjustable means for depressing the pins from contact with the paper at operating position, a friction roll operatively engageable with the record material about. the platen roll and control means preventing the adjustment of the friction roll into operative relation until the pins have been depressed at the operating positim.

of the operator and means for feedingthe paperduringthenmengagenientofthepins.

22. The combination in a typewriter, a writing platen mounted therein, equally spaced feed pins arranged to engage apertures in record material at a point contiguous to the writing point, means for retracting the pins from operative relation to the record material, means for advancing the feed pins'to feed the record material for line to line writing and means for frictionally feeding the record material alternately. with feeding operation by the feed pins.

23. The combination with a writing machine having a writing platen, of mes ..s for positively advancing apertured record material past the platen, including a traveling series of feeding pins of which a progressively changing plurality thereof have constant engagement within apertures in the record material during the feeding period of such pins, means for effecting travel movement of the pins while in engagement with the material to advance the record material past the writing platen, manually controlled means for rendering the feeding pins inoperative to advance the record material, and independently operable means for feeding record material past the platen independently of the action of the feeding pins when said pins have been rendered inoperative.

24. In a rotary platen typewriter machine, a platen around which record forms are circumferentially fed, feed pins mounted in a rotary car- 1 rier for continuously feeding said record forms in alignment past a writing point, said feed pins having operative and inoperative positions, means for advancing the pin feed means step by step for line spaced writing, auxiliary frictional feeding means for advancingtherecord forms and means for causing the frictional feeding means to become inoperative when the aligning pin feed means is moved into operative position.

25. A platen roll for a writing machine, a plurality of reciprocating feeding pins carried by the roll, means for progressively extending and retracting the pins responsive to the rotation of the roll, means for shifting the position of greatest projection of the pins circumferentially of the roll, and a. lock for locking said shifting means in shifted position. 26. A platen roll for a writing machine, a pinrality of groups of strip feeding and aligning pins mounted therein for reciprocatory motion, and cams with which the pins engage and about which they are caused to travel by the rotation of the platen whereby the pins are progressively advanced and retracted responsive to the rotat on of the platen roll, at least one of said cams being mounted for to and fro rocking adjustment whereby the position of maximum projection of the pins beyond the periphery of the roll may be varied.

27. The combination with a platen roll for a writing machine, of a series of feeding pins having operative and inoperative positions, said pins when in operative position being engageable with punched record material fed circumferentially about the roll, means for circumferentially changing the operative position of the pins toward and from the writing line. I

28. The combination with a platen roll for a writing machine, of a series of feeding pins having operative and inoperative positions, said pins when in operative position being engageable with punched'recor'd material fed circumferentially about theroll, the operative position of the pins being variable circumferentially of the roll, and means for maintaining the operative position of the pins in predetermined relation with the writing position. a

29. In a typewriter, a rotary platen, non-friction feeding means for feeding a web of material through indefinite distances, and friction feeding means adapted to be operated in connection with said rotary platen to feed said web, also indefinite distances at the will of the operator and means preventing the operation of one feeding means while the other is in operation.

30. In a typewriter, two paper feeds optionally selective, one adapted when selected to feed continuous-form paper webs in registry with each other, the other adapted to feed said webs by a frictional non-registering feed, and control means preventing simultaneous operation of the two feeds.

31. In a typewriter, rotary optionally selective feeding means for positively maintaining manifold record forms in relative alignment while being fed, rotary feeding means for frictionally feeding the forms and common means compelling the separate operation of the two feeding means.

32. The combination in a typewriter, of two rotary feeding means selective optionally, one when selected adapted to feed superposed record forms in relative alignment with each other, the other adapted to feed the forms without aligning adjustment and means for preventing simultaneous operation of the two feeds.

33. In a writing machine, a rotary platen, a pin feeding mechanism of which the pins are movably associated with said platen, said pin feeding mechanism including a cam having a closed, looplike cam surface for controlling the movement of the pins, said cam surface enclosing the center of rotation of said platen, and means for rotating said cam about said center.

34. A pin wheel feeding mechanism including a plurality of pins mounted for movement through predetermined paths, a cam having a closed, looplike cam surface for controlling the path of said pins, and means for rotating said cam so as to change the path of said pins.

35. A pin wheel feeding mechanism for a writing machine, said pin wheel feeding mechanism having an operative and an inoperative position, said feeding mechanism including a plurality of movably mounted pins, and a cam having closed, loop-like cam surface for controlling the movement of said pins, said cam being pivotally and rotatably mounted so that as it is rotated about the pivot the feeding mechanism is changed from oneposition to the other.

36. In a pin wheel feeding mechanism having an operative and an inoperative position, a plurality of movably mounted pins radially disposed about a common center, a'cam having a loop-like, closed cam surface enclosing said center, said cam controlling the movement of said pins, the cam being rotatively mounted about said center so as to shift the pin wheel feeding mechanism from one position to the other.

37. In a pin wheel feeding mechanism for a writing machine, a roller supporting the writing material, a plurality of movably mounted pins radially disposed with respect to said roller, a cam having a loop-like cam surface pivotally mounted on the axis of said roller for controlling the movement 01 said pins, and means for rotatingsaid cam about said axis so as to change the pin wheelfeeding mechanism from one position to the other.-

38. In a writing machine having a writing position, a platen,. a pin feeding mechanism associated with said platen, said pin feeding mechanism including reciprocatorypins extending beyond the periphery of'said platen for a portion of the circumference of the platen, and means for shifting the position of said portion with respect to the writing position.

39. In a writing machine, a roll, a pin feeding mechanism associated with said roll, said pin feeding mechanism including reciprocatory pins extending beyond the periphery of said roll for a portion thereof, and means for shifting the relative position of said portion with respect to the writing position of said machine.

40. In a writing machine, a platen, a pin feeding mechanism associated with said platen, said pin feeding mechanism including a cam having two positions, one of said positions guiding the pins in an inoperative path that is out of engagement with the writing material, and when in the other position guiding the pins in a path extending into engagement with the writing material so as to cause the-writing material to be advanced by said pin feeding mechanism.

41. A platen roll for a writing machine, including a rotary cylinder, a plurality of groups of reciprocatory feeding pins mounted in said cylinder for projection and retraction past the periphery thereof, each group including an actuating cam therefor normally held stationary and about which the pins are carried in constant contact by the rotation of the cylinder, said cam being capable of to and fro rocking motion to vary the position in the rotary path of the cylinder at which the pins are projected and retracted.

42. A platen roll for a writing machine, including a rotary cylinder, a supporting shaft therefor to which the cylinder is connected for unison rotation, a plurality-f groups of reciprocatory pins mounted in the cylinder, a rock sleeve mounted upon the shaft within the cylinder, cams upon the sleeve with which the pins engage in their travel with the cylinder and by which the pins are given longitudinal motion, and means for holding the rock sleeve in different positions of adjustment to effect longitudinal movement of the pins in different portions of their path of travel.

43. A platen roll for a writing machine, including a rotary cylinder, a supporting shaft therefor to which the cylinder is connected for unison rotation, a plurality of groups of reciprocatory pins mounted in the cylinder, a rock sleeve mounted upon the shaft within the cylinder, camsupon the sleeve with which the pins engage in their travel with the cylinder and by which the pins are given longitudinal motion.

44. In a writing machine, frictional feeding rollers cooperating with a platen for frictionally feeding writing material, throwout means for rendering the friction feeding rolllers ineffective, a platen roll interchangeable with the usual platen roll f a writing machine and including reciprocatoi ydeeding 'pins radially disposed in groups for positive engagementin-series punched feeding holes in the writing material, means for effecting progressive reciprocation of the pins into and out of engagement with the writing material in unison with the rotation of the platen, throwout means for rendering the feeding pins ineffective, the writing material being fed at the will of the operator alternately by frictional engagement of the rollers and by positive engagement of the feeding pins in accordance with the adjustment of the respective throwout means.

45. In a writing machine, the combination with friction rollers cooperating with a platen roll for frictionally feeding writing material and throwout means for rendering the friction rollers ineffeeding the writing material.

.46. A writing machine including a platen roll and friction rollers cooperating with the platen roll for frictionally feeding writing' material thereabout, throwout means for rendering the friction rollers inoperative, retractable feeding pins carried by the platen roll engageable' with the writing material for positively feeding the material independently of the said frictional feeding means, and manually operated throwout means for rendering the feeding pins inoperative, said frictional and positive feeding means being usable alternatively at the will of the operator but not simultaneously.

47. In a machine having frictional feeding means for writing material, and throwoutmeans for rendering such frictional feeding means inoperative, an additional feeding means selective for positively feeding the writing material independently of the frictional feeding means, said additional feeding means including a pin feeding device having operative and inoperative positions, and throwout means for moving the positive feeding means into inoperative position.

48. The combination with a writing machine having friction rollers coacting with a platen roll for frictionally feeding writing material about the platen roll and throwout means for rendering the friction rollers inoperative, of a second pin type platen roll interchangeable with the original platen roll, including retractable pins for feedingengagement with series punched holes in the writing material for positively feeding the writing material, and adjusting'means for rendering the feeding pins'ineifective, said roller throwout means and pin adjusting means being alternately operable to enable alternate feeding of the writing material frictionally and positively about the same platen roll.

49. The combination with a writing machine wherein a pin type platen roll for positively feeding writing material through the machine is interchangeable with an original friction type platen roll and including friction rollers operable in coactingrelation with either of the platens, and throwout means for rendering the friction rollers inoperative, of a pin type platen roll, a

plurality of retractable feeding pins carried by the platen roll, actuating means for p essively projecting the pins into feeding engagement with series punched holes in the writing material, and control means for the pins for rendering the pins ineffective, said control means and roller 1 throwout means being independently operable alternately to enable alternate frictional and positive feeding of the writing material.

50. In a writing machine, frictional feeding rollers cooperating with a platen roll to frictionally feed writing material, a platen roll with which the rollers cooperate, a series of retractable and extensible feeding members carried by the platen roll and progressively projected into and retracted out of positive engagement with thewriting material in unison with the rotation of theplaten roll, and manually-controlled individual throwout means for converselyrendering the theretractable lective pin type f projected peripherally beyond and then retracted within'the platen roll in unison with the rotation thereof, independently operable throwout means for the frictional feeding rollers and the retractable feeding pins for alternately rendering one eifective and the other ineifective and vice versa, whereby the material may be fed either frictionally or positively at the will of the operator.

52. The combination with a writing machine, a rotary platen supporting the record material passing circumferentially, a series of reciprocatory material feeding and aligning pins carried thereby for continuously feeding record material, said aligning pins traveling in a direction coincident with the radius of curvature of the record material at the point of engagement, and means for causing the pins to intersect the surface of the platen, said means having an inoperative position whereby in inoperative position the pins do not engage the record material.

53. A platen roll for a writing machine, and a series of adiustabletapering feeding and aligning pins mounted in the roll and adjustable control means for advancing and retracting the pins record material past the writingposition, and

common drive means for actuating the positive and impositive feeding devices.

55. In a writing machine, rotary optionally sedevice enmeable in successive registering ho es in superposed strips of record material for advancing manifolding forms past a writing position in relative registry and alignment,'and rotary feeding means includin a pressure'roller frictionally engageable with the record material for feeding record material past writing positionalternately with the pin type feeding device, and drive means for said feeding evices. 7 I

58. The "combination with a platen roll for writing machinehaving a writing position of optionally selective record material feeding means therefor, including a series of equally spaced traveling feeding pins engageable with series punched holes in record material to positively feed the material circumferentially about the platen roll and past the writing position uring periods of nonfeeding engagement of other a 57. The combination in a writing machine, a writing platen mounted therein, a rotary pin wheel feeding device including equally spaced feed pins arranged to engage spaced apertures in' record material for positively feeding the material past the writing platen, the record material and pins being optionally engageable and disengageable at the will of the operator, means for rotating the pin wheel device for advancing the feed pins to feed the record material for line to line writing, and a pressure roller engageable with the record material at the will of the operator for feeding record material past the writing platen alternately with feeding operation thereof by the feeding pins.

58. In a .writing machin dual record material feeding means for feeding superposed manifolding record forms, including feeding means having positive engagement with the record material when selected, adapted to feed superposed record forms in relative alignment with each other, and a frictional feeding means adapted when selected for feeding the forms without aligning adjustment, the respective feeding means being each engageable with, the record material for feeding operation at the will of the operator to the exclusion of the otherfeeding means. l

. 59. A writing machine wherein dual record material feeding means is operable to alternately advance record material positively and impositively past a writing position, characterized by a series of traveling feeding pins of which a progressively changing plurality have progressive feeding engagement with apertures in the record material to positively advance the record material exclusively of the other feeding means past the writing position during periods'of operation of indefinite duration, means for rendering the feeding pins impotent to advance the record material at the will of the operator, and a second feeding means frictionally engageable with record material for advancing'the record material exclusively of the feeding pins past the writing position throughperiods of indefinite duration during periods of inaction of the feeding pins, the record material being operatively engageable with either of the respective feeding means at the will of the operator, to the exclusion of the other feeding means.

60. dual feed writing machine wherein record material is progressively advanced past a writing position by frictional pressur rollers cooperating with a rotary platen roll, said frictional feeding devices being temporarily rendered inoperative by throw out means, characterized by a pin wheel feeding device for positively feeding record material past the writing position alternately with the feeding operation of said frictional devices, ncluding feeding pins progressively engageable 1n marginally punched apertures in the record material to advance the same past the writing position during periods of inoperation of the frictional feeding devices, and actuating means common to the friction rollers and pin wheel feeding devices.

61. A dual feed writing machine wherein record material is progressively advanced past a writing position by frictional feeding means capable of being temporarily rendered inoperative, characterizedbypintypefeeding meansfor prooptionally selective 4 gressively advancing record material past the writing position, wholly independently of the frictional means, the frictional and pin type feeding means being disposed one in advance of the other in the path of travel of the record material whereby such material idly passes one of said feeding means in its progress into feeding engagement by the other feeding means, either of the feeding means being engageable with the record material independently of the other at the will of the operator whereby the record material will then be progressively advanced past writing position wholly by the action of only one of said feeding means.

62. In a dual feed typewriting machine a pair of spaced pin wheel feeding devices having disappearing pins about which record material is fed circumferentially past a writing position by the engagement of the pins in the marginally punched apertures in the record material when said pins are extended in feeding position, a platen disposed between the wheels and substantially coincident with the peripheries thereof and frictional feeding rollers engageable with the record material for feeding the record material past the writing position when the pins are retracted the frictional rollers being operable alternately with the feeding pins for advancing therecord material and means by which the pins may be retracted from feeding relation with the material preparatory to feeding operation of said rollers.

63. The combination with a writing machine of the type having frictional feedin means wherein pressure rollers coact with a platen roller for frictionally feeding record material past a writing position, of a substitute positive feeding means for the record material, including a pin type platen roll and mounting means therefor in-.

terchangeable with those of the original frictional feeding means, feeding pins carried by the platen progressively engageable in punched holes in record material for positively'advancing the material past the writing position in'lieu of the frictional feeding means, frictional feeding means for feeding record material past writing position during periods of nonfeeding operation of the pins and supporting means on the writing machine common to the original and substitute platens and their mounting means.

64. A writing machine adapted for frictional feeding of record material wherein pressure rollers cooperate with a rotary platen roll to advance the record material pasta writing position,

said platen roll being provided with mounting means removable from the writing machine, characterized by a substitute pin type platen roll and mounting means'therefor interchangeable with the frictional rotary platen and removable ounting means aforementioned, feeding pins ed by-the substitute platen roll engageable in marginally punched holes in the record material for positively advancing the material past the writing position in lieu of said frictional means, pressure rollers with which the pin type platen may cooperate at will of the operator to frictionally feed the record material in lieu of the feeding pins and supporting means on the writing machine adapted to receive the respective platen rolls and mounting means interchangeably.

JOHN Q. SHERMAN.

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