US2067210A - Attachment for writing machines - Google Patents

Description

Jan. 12, 1937. j SHERMAN 2,067,210

ATTACHMENT FOR WRITING MACHINES Filed April 29, 1932 Patented Jan. 12, 1937 PATENT OFFICE ATTACHMENT FOR WRITING MACHINE John Q. Sherman, Dayton, Ohio Application April 29,1932, Serial No. 608,231 48 Claims. (01. 197 126) This invention relates to typewritingmachines, and particularly to improved paper feeding and platen devices for progressively feeding superposed manifolding webs past writing position while maintaining them in aligned and registering relation. The present construction comprises spaced pin wheel feeding devices having automatically disappearing pins engage marginally punched superposed paper webs to advance them progressively over a stationary platen surface and relative to interleaved transfer or carbon strips or ribbons which are fed transversely of the record web. Means is provided for utilizing an ordinary form of friction feed means alternately with the pin type feeding devices for ordinary letter writing.

v The object of the invention is to simplify the construction as well as the means and mode of operation of the paper feeding means for manifolding typewriters whereby it will not only be cheapened in construction but will be more eflicient in use, uniform and accurate in operation, easily operated and unlikely to get out of repair.

In using pin wheel feeding devices for superpo'sed manifolding forms, it is quite unnecessary that the ordinary rotary platen be employed since the relatively spaced pin wheels operatively engaging with the margins of the superposed manifolding webs are sufficient to feed and control the travel thereof. Therefore a further object of the invention is to dispense with the usual rotary platen and provide, in lieu thereof, a stationary platen bar which will afford a stationary solid surface against which the type bars impinge at-the writing position.

A further object of the invention is to provide a pin type feeding mechanism which is adjustable to accommodate paper webs of different widths. i v

A further object of the invention is to provide means whereby the ordinary type of friction feed mechanism may be employed for ordinary letter writing alternately with the employment of the pin type feeding devices.

A further and important object of the invention is to provide means for utilizing transfer or carbon strips or ribbons fedtransversely of the record webs in combination with pin type feeding devices.

A further object of the invention is to provide improved transfer ribbon guide and protective means.

With the above primary and other incidental objects in view as will more fully appear in the trating portions 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. w 5

Referring to the accompanying drawing wherein is shown the preferred but obviously not necessarily the only form of the embodiment of the invention, Fig. l is a perspective view of a typewriting machine to which the present in- 10 vention has been applied; Fig. 2 is an end elevation of the traveling typewriter carriage illus-- of the present irivention mounted thereon. Fig. 3 is a perspective view of the paper feeding devices of both frictional l5 and pin wheel type together with the stationary platen and the transfer strip guide and protective means. Fig. 4 is a detail sectional view of one of the pin wheel feeding devices disclosing the means for operating the disappearing pins. 20 Fig. 5 is a detail view of one of the feeding pins removed from the pin wheel feed device. Fig. 6 is a. side view of the mounting heads for the feeding pins. Fig. '7 is a side elevation of the actuating cam by which the feeding pins are progressively extended and retracted as the feeding wheel rotates. Fig. 8 is a detail perspective view of one of the carbon strip guiding and protective arms. Fig. 9 is a detail view of the adjusting and retaining means for the pin wheel feed mechanism by which the latter may be adjusted into and out of operative position.

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

In the drawing l is a conventional form of purpose of illustrating the application of the present paper feeding and platen devices.

Revolubly journaled in the traveling carriage v 51 of the typewriter and progressively rotated by the usual line spacing mechanism, is a rotary shaft 8 corresponding. to the usual platen shaft of a conventional typewriter. Secured upon the shaft 8 at spaced intervals are rotary pin wheels 55 the shaft 8 for unison rotation therewith, the

wheels being capable of relative adjustment toward and from each other upon the shaft to accommodate paper webs of different widths. The head l2 of each wheel is provided with radial recesses or'grooves M, as shown in Fig. 6, in

- tion while the preceding pins are being simulwhich the feeding pins ID are mounted for reciprocatory motion. Located adjacent to the head l2 and the series of radial pins l9 slidingly supported thereon, is a stationary cam member l5 having a projecting cam flange l6, shown in detail in Fig. 7, which engages within notches II in the respective feeding pins Ill. The actuating cam I5 is stationarily carried upon a sleeve or tube l9 surrounding the shaft 8 while the feeding wheel rotates relative thereto carrying with it the pins Id. The actuating cam I5 is so shaped that the feeding pins III are maintained in retracted positions throughout a suitable portion of their path of travel and are projected outwardly beyond the periphery of the wheel 9 only as they approach the web engaging position. The cam is so shaped that only a comparatively few of the feeding pins ID are projected beyondthe peripheral surface of the wheel at the same time. These pins normally engage the paper webs in proximate relation to,'but preferably just beyondthe writing position. While corresponding feeding pins of each wheel are in operative feeding engagement with the webs/the succeeding pins are being projected into such operative positaneously retracted. Thus the pins do not interfere with adjacent parts of the machine structure, and having engagement with comparatively few holes of the paper webs at the same time will feed the webs uniformly without subjecting them to undue strain or tearing the webs adjacent to the holes. The particular disappearing pin mechanism heretofore referred to is shown and claimed in copending application Serial No. 542,855, filed June 8, 1931.- The mounting-sleeve 9 is held stationary by an arm 29 secured thereto and having en a ement with a cross rod 2| of the typewriter carriage. However in lieu of fixedly securing the arm 20 directly to the mounting tube or sleeve I9 which carries the actuating cam l5, the sleeve l9 may be provided with a' notched head or knob 22 as shown in Fig. 9, and the arm 20 may be provided with a locking detent or latch member 23 engageable alternately in the respec-' tive notches 26 of the knob 22 to hold the knob and therewith the mounting sleeve or tube l9 in either of two rotative positions. By rocking the sleeve or tube 9 and therewith the actuating cam IS the position at which the feeding pins ll] are projected beyond. the peripheries of the wheels 9 may be changed. Instead of projecting the pins at a position for operative engagement with the punched paper web, they may be caused to project in an inoperative position in which the webs will not be engaged. This'adjustability 'of the feeding pins to inactive position enables the usual form of friction feed roller 25-25,. ordinarlly found in suchtypewriter construction to aoo'zaio 9, each having a succession of radially disposed be utilized in conjunction with the peripheral faces l9 of the feed wheel for feeding unpunched paper'webs or letter sheets. rollers are moved into and out of operative relation with the peripheral surfaces of the feed wheels 9 by the usual finger trip lever 26 and link 21. The construction shown is the conventional friction feed mechanism and per se forms no part of the present invention except so far as in relation to andco-operates with the pin wheel devices 9. These friction rollers 25 co-operate with that portion of the pin wheels 9 within which the feeding pins l0 have been retracted. As before mentioned during such operation the actuating cam l5 has been adjusted to project the feeding pins In only through that portion of the feed wheel periphery beyond the range of the These friction feed paper or intermediate the point where the paper 1 contacts the feed wheels 9 in entering the ma-" progressively advanced by the rotation of the feed wheels 9 either by engagement of the pins 10 or by coaction of the friction rollers 25 and is thus carried past the platen bar 39' which is stationarily supported by the discs 29.

Supported upon the frame rod 2| are curved arms 32 having at their ends plate like heads 33, the margins of which are reversely turned-at 34 to afford guides for the carbon or transfer stripsv or webs as they enter between thesuperposed webs of record material and as they leave such webs at the opposite side of the machine; Suchguides insure the strips entering between the record webs snioothly and uniformly, and protect the strips at such point and prevent them from being displaced by the advance movement of the record webs. These guide arms 32 are preferably pivoted to l the frame rod 2| to enable them to be turned out of operative position when the record webs and the carbon strips.

The

Slotted keeper fingers 35 are mounted upon I the frame rod 2| and overlie the record webs to loosely retain the punched margins of the record webs in operative'engagement with the projected pins i9 which are progressively projected through the holes in the superposed webs into the slot of the keeper member 35.

The retractive action of the feeding pins in en able the use of transversely traveling transfer or carbon ribbon which otherwise would be unusable due to interference with pins of the feeding wheels 9 across the faces of which the strips must be advanced. However in the construction as described the carbon strips or ribbons pass in proximity to the smooth portions only of the feeding wheels, the pins l0 being projected beyond the peripheries of the wheels only beyond the location of the carbon ribbon. By this construction it is possible to use manifolding ribbons with a pin wheel feed device since the pin wheels feed thesuperposed forms loosely without friction tension and the disappearing pins clear the carbon ribbon. If pin wheels of the fixed radial pin type were employed, they would necessarily engage with the punched paper at all points contiguous to the writing line and hence interfere with and tear the transfer ribbons. By the present construction multiple carbon ribbons may be successfully'utilized with pin wheel type feeding devices and also the ordinary frictional type paper feeding mechanism may be utilized in conjunction with the pin wheel feed devices for feeding ordinary unpunched letter sheets.

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 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 be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprise the preferred form of several modes of putting the invention into efiect, and the invention is therefore claimed in any of its-forms or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention, I claim:

1. In a typewriting machine, a pair of spaced pin wheel feeding devices having disappearing pins about which paper is fed circumferentially, a stationary platen bar interposed between the wheels and substantially coincident with the peripheries thereof, and carbon strip feeding means feeding transfer strips transversely of the paper webs in registry with the platen bar. 2. In a typewriting machine, a pair of spaced pin wheel feeding devices having disappearing feeding pins, a stationary platen surface intermediate the feeding wheels and friction feeding rollers engageable with the peripheries of the feeding wheels and operable alternately with the feeding pins for advancing record material across the platen surface.

3. In a typewriting machine, the combination of a stationary writing platen with pin wheel feed mechanism including reciprocatory feeding pins engageable in marginally punched holes in writing material to feed the writing material .past the writing platen for feeding the writing material in a circumferential path around said platen, a shaft carrying said pin wheel feed mechanism, means carried by said shaft for causing the pins of said pin wheel feeding mechanism to have a rectilinear movement when entering and leaving the record material, said platen including a plurality of spaced supports carried by said shaft, having mounted thereon a platen bar. v

4. In a writing machine, the combination of a stationary platen with a pin wheel feed mechanism for advancing the record material through a curviiinear path about said platen, said pin wheel feed mechanism including means simultaneously engaging all of the pins for controlling the path thereof, said means causing the pins to move into apertures in the record material along the-radius of curvature thereof, said means causing the pin wheel feed mechanism to have an operative and an inoperative position.

5. In a writing machine, the combination of a stationary platen with a pin wheel feed mechanism for supplying writing material in a circumferential path around said platen, said pin wheel feed mechanism including a pair of spaced wheels, said platen including a platen bar extending between the spaced wheels, and a carbon strip feeding mechanism independent of said pin wheel feeding mechanism.

6. In a writing machine, a stationary writing platen including a shaft, a bar carried by a series of spaced discs mounted upon the shaft, a ribbon feeding mechanism, a carbon strip feeding mechanism independent of said ribbon feeding mechanism, and a pin wheel feeding mechanism underlying a portion of the carbon strip feeding mechanism for supplying record material circumferentially about the platen.

7. In a writing machine, the combination of a stationary platen having a bar with fee ng mechanism, said feeding mechanism includ ng a pin wheel paper feeding mechanism supplying writing material in a circumferential path about said platen, a shaft supporting said mechanism, a mounting carried by the shaft for supporting the platen and a carbon strip feeding device independent of said pin wheel mechanism.

8.- In a writing machine, a stationary platen, a pin feeding mechanism for advancing the writing material circumferentially past said stationary platen, a shaft for said mechanism,'a mounting carried by the shaft for supporting the platen and a mechanism for guiding a strip of carbon transversely to the movement of the writing material.

9. In a typewriting machine, a stationary platen, a rotary pin feeding mechanism for advancing the writing material past the platen, a shaft for supporting the feeding mechanism and a second shaft concentric with the first'shaft for supporting the platen and a feeding mechanism for feeding a car'- bon strip at right angles to the path of movement of the writing material.

10. In a typewriting machine, a stationary platen, a pair of pin wheels having feeding pins for advancing the writing material circumferentially past the stationary platen, said feeding pins entering the record material along the radius of curvature thereof, a shaft for carrying said pin wheels, said pin'wheels being adjustably mounted on the shaft so that the distanceof the spacing intermediate the pin wheels may be adjusted to accommodate difi'erent widths of writing material.

11. In a writing machine, the combination of a stationary platen with feeding mechanism, in-

eluding pin wheels for advancing the writing material, a support for said pin wheel feeding mechanism, said pin wheels being adjustably mounted L on said support, a carbon strip feeding mechanism independent of said pin wheel feeding mechanism, said carbon strip feeding mechanism including guides adjustably mounted so as to be adjusted with the adjustment of pin wheel feed mechanism so that the writing machine may accommodate various widths of material.

12. In a'yvriting machine, a stationary platen, a pair of pin wheels rotatively mounted for advancing the writing material past the platen, mov able guides associated with the wheels, said guides being common to all the pins, said pin wheels having an operative and an inoperative position determined by the position of said guides, and a friction feeding mechanism for supplying the writing material to the stationary platenwhensaid friction feeding mechanism bei'iig in inoperative position when the pin wheel feeding mechanism is in operative position.

14. In a writing machine, a stationary platen, a pair of pin wheels for advancing the writing material past the platen, said pin wheels having an operative and an inoperative position, and a friction feeding mechanism for supplying writing material to the stationary platen when the pin wheel feed mechanism is in inoperative position, said friction feeding mechanism being in inoperative position when the pin wheel feed mechansm is in operative position.

15. In a writing machine, a stationary platen, a pair of wheels for advancing the writing material, said wheels having pins extending through their periphery for positively advancing the writing material, said pins having operative and ma,

operative positions, and friction mechanism cooperating with said wheels for frictionally advancing the writing material when the pins are in inoperative position.

16. In a writing machine, the combination of a stationary platen with a feeding mechanism, said feeding mechanism including a pin wheel paper advancing device, and a carbon strip feeding device, said carbon strip feeding device including means overlying said paper feeding mechanism.

17. In a writing machine, a stationary platen, a pin feeding mechanism for advancing the writing material past said stationary platen, and a device for guiding-a strip of carbon transversely to the movement of the writing materiaLsaid guiding device overlying said pin feeding mechanism.

18. In a typewritlng machine, a stationary platen, a rotary pin feeding mechanism for advancing the writing material past the platen, anda feeding mechanism including a guide for supplying a carbon strip at right angles to the path of movement of the writing material, each of said mechanisms being adjustably mounted so as to accommodate writing materials of various widths.

19. In a typewriting machine, the combination of a stationary platen with a pin wheel feeding mechanism having the pins extending through the wheel thereof, said pin wheel feeding mechanism having an operative and an inoperative position, said feeding mechanism, when in inoperative position, having the pins extending through the wheel out of contact with the writ ing material and means for-actuating the pin to said platen, said means including pin feeding devices, said pin feeding devices having an operative position and an inoperative'position, and

means for supplying writing material to the platen when said first means is in inoperative position.

22. In a typewriting machine, the combination of a stationary platen with means for positively feeding the Writing material circumferentially past said platen including pins having a movement coincident with the radius of curvature of the record material and positively engaging opposite sides of the paper between which the 23. In a writing machine, the combination 0;.

a stationary platen including a platen bar, a

shaft and a plurality of spaced supports, mount ed-on said shaft for supporting the platen bar with a pin wheel feeding mechanism for supply ing writing material circumferentially to said platen, said pin wheel feeding mechanism engaging opposite edges of the writing material between which the writing takes place, means for rendering the pin wheel feeding mechanism ineffective for indefinite periods at the will of the operator and auxiliary feeding means for feeding the writing material during ineffectiveneriods of the pin wheel feedingmechanism.

24. In a writing machine, the combination of a stationary platen with feeding mechanism, said feeding mechanism including a pin wheel feeding mechanism supplying writing material to said platen, said pin wheel feeding mechanism including feeding pins having a rectilinear movement coincident with the radius of curvature of the record material, and a carbon strip feeding device for supplying a carbon strip independently of said pin wheel feeding mechanism but adjacent thereto, said carbon strip feeding mechanism including adjustable guides for supplying carbon strips to the platen intermediate the pin feeding wheels.

25. In a writing machine, a stationary platen having a writing position past which record material is progressively advanced, record material feeding means including a rotary pin wheel the pins of which are engageable in marginally punched holes in the record material to positive-= 1y advance the record material past the writing position, and a pressure roller cooperating with the periphery of the pin wheel and engageable with the margin of the record material to advance the record material past the writing posi= tion independently of the feeding action of the pins and means for rendering the respective feeding devices effective or ineifective at the will of the operator.

26. In a writing machine, a stationary platen past which record material is progressively advanced, dual optionally selective feeding devices for the record material located at each end of the stationary platen and means for rendering the respective feeding devices eifectivejqr ineifective at the will of the operator for-advancing the record material past the platen by the respective devices alternately. 3

27. In a writing machine,-a stationary platen past which record material is progressively advanced, dual optionally selective feeding dc,-

' vices for the record material located at each end of the stationary platen, in'cludinga pin type feeding device engageable in marginally punched apertures in the record material for positively advancing the record material past the stationary platen and pressure rollers having fric-' -wheels when the pins are retracted and operable tional engagement with record material for impositively advancing record material pastv the stationary platen, and means for rendering the respective feeding devices effective or ineffective at the will of the operator.

28. In a writing machine, a stationary platen' platen, pressure rollers frictionally engageable with marginal portions of the record material for advancing the record material past the stationary platen, independently of the feeding pins, said rotary wheels being common to the feeding pins and the pressure rollers to effect advancement of the record material by action of one or the other upon rotation of the wheels.

29. In a writing machine a dual optionally selective record material feeding means, including a pair of spaced rotary members, a stationary platen member interposed therebetween having a writing position past which record material is advanced, a series of feeding pins engageable in marginally punched holes in the record material for positively advancing the record material past the writing position, pressure rollers engageable with the record material for advancing the record material past the writing position independently of the feeding pins, said rotary spaced membersbeing'eommon to the feeding pins and the pressure rollers for effecting feeding operation thereof'by the rotation of said rotary members. k

30. A dual optionally selective record material feeding means for a writing machine, including a stationary platen having a writing position past which the record material is progressively advanced, a pair of spaced wheels located one at each end of the platen, feeding pins carried by the pin wheels for engagement in marginally punched holes in the record material for positively advancing the record material past writing position, pressure rollers cooperating with said wheels for impositively feeding the record material past the writing position, and manually adjustable means for rendering either .of the feeding devices operative or inoperative at the will of the operator.

31. A writing machine including a stationary platen having a writing position past which record material is advanced, a pair of spaced rotary wheels located respectively beyond the limits of the platen, a plurality of feeding pins engageable in marginally punched holes in the record with the marginal portions of the record material to impositively advancarecord' material past the writing position, said rotary wheels being common to both the feeding pins and the pressure rollers to effect advancement of the record material by either the pins or rolle'rs' upon rotation of the wheels.

32. In a type writing machine a pair of spaced pin wheel feeding devices having disappearing pins engageable in marginally punched apertures in record material to be fed when said pins are extended, a stationary platen surface intermediate the feeding wheels,- frictional feeding rollers engageable with the peripheries of the feeding alternately with the feeding pins for advancing record material past the platen and means for retracting the pins from feeding relation with the material.

33. In a writing machine wherein superposed strips of record material and strips of transfer material interleaved between the strips of record material are progressively advanced in transverse paths of travel,-pin type feeding means engageable in marginal apertures in the record material for advancing the record material past a writing position and guide means for the transfer strips bridging the path of travel of the pin type record material feeding means.

34. In a writing machine wherein superposed strips of record material and strips of transfer material interleaved between the strips of record material are progressively advanced in transverse paths of travel, pin type feeding means engageable in marginal apertures in the record material for advancing the record material past awriting position the pin type feeding means and the transfer strips being movable in transverse paths of travel and means for automatically retracting the pin type feeding devices out of inof transfer material are advanced through transverse paths of travel, a traveling pin type feeding device having disappearing pins engageable in marginal apertures in the record material for progressively advancing the record material past a writing position'and guide means for the feeding pins of the pin type feeding device and the transfer strips defining non-interfering paths of travel.

36. In a writing machine wherein superposed strips of record material and interleaved strips of transfer material are advanceii'througlr transverse paths of'travel, a traveling pin type feeding device engageable in marginal apertures in the record material for progressively advancing the record material pasta writing position, the feeding pins of said pin type feeding devices being retractable, and means for retracting the pins beneath the plane of travel of the transfer strips during their travel motion past such strips.

37. In a writing machine wherein superposed strips of record material and interleaved strips .of transfer material are advanced through transprogressively advancing the record material past a writing position, and guide means for the transfer strips directing the transfer strips transversely of the path of travel of the pin type feeding device, in offset relation therewith, whereby interference therebetween will be avoided.

38. Pin type record material feeding means for writing machines having a platen with a flat writing surface including a revoluble shaft, 9. plurality of rotary pin wheel material feeding devices engageable in spaced apertures in the record material, carried thereon and axially adjustable relative to eachother, a plurality of rela tively spaced discs located intermediate the pin wheel feeding devices concentrically therewith, said disks being tangentially disposed with respectto the plane of the writing surface, and means for rotating the shaft.

39. In a type writing machine, a platen having the platen, a rotary shaft upon which the pin wheel feeding devices are adjustably mounted for relative movement toward and from each other-to accommodate record material of different widths, and guide members mounted concentric with said shaft intermediate the pin wheel feeding devices for supporting the record material intermediate the pin wheel feeding devices, said guide members supporting the record material in substantially the plane of the writing surface.

40. Pin type record material feeding means for a writing machine .having a platen having a substantially flat writing surface, including a rotary shaft, a pair of spaced pin wheels carried thereby the pins of which are engageable in marginal apertures in record material to advancethe record material past a writing position, a plurality of discs mounted concentric with the shaft intermediate the pin wheels, the discs and pin wheels being of approximately equal diameters and means to rotate the shaft.

41. In a typewriting machine, a platen, a pin type feeding mechanism having pins entering the record material in a direction substantially normal to the radius of curvature thereof for advancing writing material past the platen and a feeding mechanism for feeding superimposed carbon strips at right angles to the path of the writing material.

42. A writing machine for use with various widths of continuous length record material including a platen, a, pair of spaced. rotary pin wheel units mounted in relative axial adjustment toward and from each other to enable the engagement of their pins in holes in the record material of difierent widths, and a plurality of relatively spaced record material supporting discs located intermediate the pin wheel units and concentric therewith, said discs being tangentially disposed to a plane common to the surface of. the platen and the pin wheel units, and actuating means for imparting rotary motion to the pin wheel units.

43.-A writing machine for use with continuous length record material including a platen having a substantially flat writing surface, a pair of spaced rotary pin wheel units, the pins of which are engageable in marginally punched holes in record material tobe fed thereby, and a plurality of discs concentrically disposed with said pin wheel units and therebetween, the pin wheel units and discs being axially adjustable one relative to the other, andtangentially disposed with respect to the plane of the writing surface and actuating means for imparting rotary. motion to the pin wheel units.

.44. A writing machine for use with continuous length record material including a' platen having aoe'aaro ing a platen with a flat writing surface, a feeding device including a pair of spaced pin feeding devices each having feeding pins engaging punched holes in the record material, means for actuating thepin feeding devices to advance the record material across the writing surface and through an arcuate path, and arcuate record material guiding members tangentially disposed with respect to the plane of the writing surface and mounted intermediate the pin feeding devices.

46. A writing machine for use with record material having feed holes punched therein, including a platen having a fiat writing surface, a feeding mechanism including a pair of spaced pin feed devices each having pins engaging the apertures in the record material to feed the same across the flat writing surface and through an arcuate path tangentially disposed with respect to the plane of the writing surface, and arcuate record material supporting means for guiding the record materialthrough the arcuate path tangentialiy disposed with respect to the surface of the platen, said supporting means being arranged contiguous to the pin feeding mechanism.

-4'7. In a writing machine foruse with continuous length record material, the combination of a platen with means for feeding and align-- ing the record material, and a plurality of relatively spaced discs associated with thefeeding means, said discs being tangentially disposed with respect to a plane through which the record material passes, said plane being common to the surface of the platen and the feedingmeans, and actuating means for imparting motion to the feeding means. V

48. In a writing machine. the combination of a platen with alternatively selective feeding mechanism for advancing the record material relative to the platen, including travelling pin type feeding means engageable in longitudinally paced holes in the record material for advancing the record material past a writing position, a support upon which the pin Wpe feeding means is laterally adjustable to accommodate 'difierent record material, and a frictional feeding means for advancing record material relative to the platen during nonoperative periods of the pin tym feeding means.

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