US1626641A - Typewriting machine - Google Patents

Description

May 3,1927. 1,626,641

B. c. STICKNEY TYPEWRITING MACHINE Filed Oct. 25, 1924 3 Sheets-Sheet l Wye/7hr May 3 1927.

a. c. STICKNEY TYPEWRITING MACHINE Filed m. 25, 1924 3 Sheets-Sheet '2 Patent May 3, 1927.

' Lt-Ml are,

nominal: c.,s'.rIcKNEY, or an'rnnnronn, new JERSEY, assre'non 'ro Ummawoon TYPEWRITERCOMPANY, on NEW YORK, N.'Y., A CORPORATION or DELAWARE.

mnwnrrme MACHINE.

Application filed October 23, 1924. Serial No. 745,281.

This invention relates to typewritin machines which employ work-webs ma e up of printed forms; carbon-sheets being interleaved with the web-plies, and relative shift ing of the carbons being effected from form to form as the typing proceeds.

One of the main objects of the invention is to'simplify and improve the construction and operation of-this class of manifolding 1 typewriters, Usually the'cylindrical platen of the typewriter has to be elevated as a preliminary to straightenin out the webs, so as to render the shiftingo f the carbons possible; and it is one of the'objects of the invention to avoid this displacement of the platen, and to avoid the necessity of complicatin-g theplaten mechanism, and to slmplify the carbon-shifting operation.

Another object" making alterations in. the typewriting machine, and to construct the web and carbon:

handling devices so that they are in the nature of attachments, which can be connected to any standard typewriter, thus making it y unnecessary t olvmanufacture the t pewriting machine with the web-handling evice as a unit. The web-handling device can be manufactured ands plied separately, and can be readily applie toeither new or old machines, greatly reducing the cost to the typewriter purchaser, and rendering'it unnecessary as heretofore to carry in stock combined typewriting machine and webhandling units. v

' In carryingo'ut the present invention in Y its preferred form, there hangs at the back of the typewriting machine aloop of work-- web with. interleaved loops of carbon, the composite loop being held stationary at it rear end, and being of such length that it" permits the'usual range of movement of the platen carriage,- the-loop swinging as its forward end' is carried to the right and left by the carriage. Thiscomposite'loop, moreover, is of sutlicient length to permit the front end thereof-to be fed line byline around the platen until a form is typed; and even atthis time there is still sufficient length of loop left-hanging, to permit the necessary ondwiso travel of the carriage.

The form having been typed, the usual feed-rolls are cast off from the platen, to

release the weband carbons, and the rear is to avoid the necessity of" end of the composite loop is moved back, to j straighten out the loop, and also to pull the typed web back around theplaten, this re traction proceeding until the forward ends of the carbons are withdrawn from the type- AWriting machine, and the carbons themselves lie in fiat condition from end to end, the Work-web plies being also flattened; At this time the feed-rolls may be again thrown onto the platen, and the platen may be revolved to pull forwardlythe "plies of work-webv carbons. Then the looping rame ordevice is moved forwardly to recreatethe loop,

which again dangles at the rear of the type ,writing machine. Then the platen is rotated to bring the first untyped form into the typewriter and around the platen, together with the forward ends of the carbons;

whereupon typingof such form proceeds:

Suitable leading-end work-gages are provided for the various steps, and

also provided for severing the web.

One of the advanta es of the invention arises from the simpliclty ,of operation,the work-web plies always remaining in-position around the platen and conveniently operated thereby. If referred, the work may be pulled around t e stationary platen by a knife is hand and set up to the gages. 'The gages I may mechanically determine thelength of shift of the web relatively tot-he carbons, and also the lengthy of form to tear off.

Other features and advantages will here inafter appear.

In the accompanying drawings,

Figure 1 is a sectional diagrammatic side elevation, showing the platen and the pa ertables, and showing the shifting forwar of the work-plies as having been completed relatively to the stationary carbons, while the latter are being held stationary and in flat condition. v

Figure 2 is a sectional diagram of anUnderwood Standard typewriting machine with the present invention applied thereto, and showing the loop of web havin been recreated after the completion of the web Figure 3 1s a similar view, showing the completion of the next step, which consists in the-advance of the forward portion of the composite loop, including both the work plies and the carbons, to bring the next untyped form on the web (together with the interleaved carbons) into position for typing the first line of such form; and at this I time these parts are in position for severing from the web the typed form, at the head of the web, but ermitting the form that has last been-typed to remam unsevered from the web.

Fig' ure lis an elevation of the typewriting machine and the web-handling devices attached' thereto, showing the'step whichv is taken after the completion of the typing of a form, namely, the straightening out of a composite web preparatory to advancing the web plies alone to the position seen .at Figure I while the earbons'remain stationary.

Figure 5 is a frontelevation of the platen and platen-frame, showing the adjustable Web-severing knife sup orted on bracket-s attached to the ends of 1518 'platenframe, and also showing a table or work-web support carried on'the same brackets and provided with gages for the leadin edge of the web.

Fi ure 6 is aplan 0 the Underwood Stan ard type writing machine with the webhandling attachments fixed thereto,- and showing the composite web in straightenedout condition preparatory to effecting a relative "shift between the work-web and the carbons, as at Figure 43.

The standard Underwood typewriting machine comprises arevo'lublej platen 10, jour-' naled in a platen-framei 11, the latter sup ported upon a letter-feeding carriage 12, running upon .rear and front rails 13, 14;

' key-operated type-bars 1 5 striking against the front'of the platen. The platen-frame comprises a rear introdu'ctory paper-shelf '16, extending forwardly and' down to the platen. A stationary front writer frame.

is mounted upon the ,type- Upon thebottom of the platen run pressure rolls 20, which may be cast off to release the work, but which co-operate paper-guide I7 with the platen at theoperation of line-feedting the paper, and also when rapidly advancing or retracting the paper; the platen being revoluble b either the line-spacing mechanism 21 or t e platen knobs 22.

The work-web comprises a number of plies 23, which may be drawn from any source of supply (not shown) at the rear of the typewriter stand 24; .These plies may be loose and separate, or they may be joined in the form of a fan-folde -web.. On entering the typewriting machine, the work runs down upon the rear paper-shelf 16,

and forwardly.

around the under side of the platen and up in front-thereof, and is delivered along a table or support 25 mounted at the delivery side of the platen, the work being carried around the platen by the rolls 20 at the lineiceding operation. is seen at Figure 3, the work-plies are interleaved with carbon-sheets 26, so that all the work-plies are typed.

During the letter-feeding operations of the carriage, the composite web, i. e., the workplies with the interleaved carbons, is festooned or hangs in a slack or loop 27 in rear of the Underwood typewriting machine 28, the forward end of the loop being caught by the feed-rolls-2O and platen 10, and hanging from the top edge of the rear paper-table 16. This end of the loop swings or travels edgewise with the paper-carriage at the let-. tor-feeding v movements. At its rear end, however, the loop is stationary during the typing operation, the rear ends of the carbons being secured to carbon-blades 29 of a form known in this art, saidblades being stationary during all-the typing and linefeeding operations. The plies of work-web hang from a rounded shelf or bar 30, which is also stationary during the typing operat ons. The work-plies hang from said bar down behind the typewriter stand 2&, whence they extend to the usual web receptacle or other source of supply. The composite-loop 27 is of such ample length that the forward ends of the carbons may feed up around the platen from the Figure 3 position (which shows the carbons in position for typing the first line on the fresh form) far enough to type the entire form, while still leaving the loop 27 of sufficient length to accommodate the endwise travel of the carriage between its extreme positions for writing a full 'lengthline upon the web. The remainder.

of the loop or slack in the web, at the com- .letion of the typing of aform thereon,jis indicated by the dotted line 32 in Figure 2; the length of this remainder being dependwhich the work-web is originally divided.

ent upon the length of the printed forms into At the completion of the typing of a the composite web both to give a supply for the line-feeding operations-and also to allow for the travel of the carriage, but also provides a simple method for effecting such relative carbon-shift, and of oi'ercoming the difliculty of eifectinga shift through a looped composite web; and the further advantage is gained of eii'ecting a shift while the workplies remain in position around the platen, thus conducing to simplicity of construction andoperation.

Preparatory to effecting the carbon-shift, the loop 27-is brought into substantially straight condition. For this .purpose the holders 29, and'the carbon-carrier or'block 33 upon which they arefixed and through which the work-plies 23 are threaded," are all -1'n'ounted upon the free ends of arms or frame 34, which are pivoted at 35 to swing backwardly from the position 'at Figui'e 2 where the composite web is held in typing condition) to the flattened-out condition seen at 36, Figure 4. The flattening or straightening of'the webs is important, it being known'in. this art that it is difficult or impossible to advance a multiplicity of carbons between stationary wor-kshcets around a platen, or throughany other undulatory or tortuous path, but that they can be slipped readily past the work-sheets (or vice ,vcrsa) if the sheets and carbons are flattened or substantially straight. The carbon-carrier is preferablyso mounted upon the arms 34 that it assumes a level position at this time, to agree with the level condition of the composite web, as at Figure 4. The arms 34 are held rigidly at their upper ends by a cross-bar 37, and at their lower ends by a rock-shaft 35, so as to form a rigid rectangular frame swingable betweenthe positions at Figures 2 and 4; said rock-shaft 35 being journaled in the rear endsof angle-plate bracket-arms 38, which extend rearwardly from beneath the base of the typewriter 28 and are rigidly connected at their rear ends by a stiffening cross-bar 39 riveted thereto. These fixed arms 38 areattached to the, typewriting machine without alteration in said machine, being held up against the bottom of said machine by screws 40, which are usually provided for holding on the four .-rubber,

feet 41 of the typewriter; the arms having perforations up through which the screws 40 pass as they are threaded up into the perforated holes usually provided in the Underwood tfipewriter for them. The usual screws t1us hold therubber feet and the arms 38 rigidly upon the machine.

For giving the frame its motion from the. looping position at Figurefz to the web-straightening position at- Figure 4, there is preferably .employed a handle 42, of any suitable form and location. which is shown in this instance as mounted upon an upstanding lever43 placed at one sideof thepaper-shifting, operation said arm 43 is swung up to the position "at Figure 4, there by swmgingdown the arm 45 and driving the guiding: link 47 backwardly, whereby the frame 34 swung to its extreme rear position, in which position it may be locked by the toggle action, of the parts45, 47; a

stop 49 fixed on 'abracket-arm 38 limiting backward movement of the frame 34 may.

be permitted to continue. past the point at which it straightens out the'remainder 32' of the original loop. During/this supplemental rearward movement, the composite,

web is pulled back around the platen, and the form which has ust been typed is pulled clear of the typwriting machine, the leading ends of the carbons being now located at a point back of the paper-shelf 16, thuspermitting the carbons to extend in substantially flat condition from their forward ends to their rear ends, as at Figure 4.

At this time there is a leading portion of the composite work-plies still extending around the platen, as at 50, Figu1.'e 4, this leading. portion consisting of the work-form which next precedes the formthat has just been typed. Usually therefore there are two typed work-forms in the machine; the

unscvered previously typed head form 50 bein retained to serve as a means for advancing thewcb relatively to-the carbons.

I The feed-rolls 20 having been restored, the platen isrotated, and by co-opcration with said rolls pulls forward the web-plies over the top of the paner-sh lf 16 and between the carbon-holding blades 29, and over the rounded transve se apron or bar 30' and up from the source of supply; while the carbons are held stationary by the fined blades 29, said carbons, because "of their flat and unbound condition, offering no appreciablc obstruction to such advance of .the

work-plies. This relative work-shifting is continued until the leading end of the web,

i. e., the top edge of the previously typed form 50. reaches a gage 51, as at Figure I,

this marking the completion of the relative work-shift and bringing the first untyped form on the web over the leading end poition of the set of carbons. It will be noted that at this t me the two typed forms, one

after the other, reach from the, top edge of the paper-shelf 16 down around the platen and up to the gage 51. The leading typed form on the web has no further function to The extent of this advance may be mechani-' perform. The second typed formserves in the subsequent step of the web-handling operation.

The parts being new in the position seen at Figure 1, the handle 42 is pulled forward- 1y to theposition" at Figure 2, against a stop 53 which is also provided upon a bracketarm 38. This moves forward the web-controlling frame 3 to the position for typing ,at Figure 2, and recreates or forms a fresh loop or slack '27. The weight of 34: holds it 'in forward position. By further use of the platen-knob 22, the platen may be revolved, I arid by co-operation with the feed-rollsQO it:

may draw forward the composite web from the position at Figure 2, carrying the carbons (together with the first untyped form on the webs) forwardly under and up around the platen to the position seen at Figure 3, preparatory to typing the new form.

cally determined by a gage 54. Atthis time the loop 27 is partly taken up, as at 54, Figure 2. \Vhen the leading edge of tlie web is i brought up against gage '54, the first workform may be torn off by means of a severing knife 55, which may be provided at the delivery side of the platen. This leaves one typed form extending from the knife'down lyeuljustable up anddown a staff or work-' support. 56, which is fixed at its lower end upon a cross-bracket 57, the latter extending from one platen-frameend-58 to the other,

said cross-bracket or frame at its ends be ing riveted to ears 59 formed upon bracket-s plates 60 securedto the platen-frame ends 58 by the screws 61 which are usually'providedupon the Underwood machine for rem'ovably securing cover plates upon said ends 58. From said brackets extend upwardly arms 62, which, by means of screws 63. carry the transverse web-severing knife 55; said screws being settable-into any desired holes 64 of said arms-(titer adjustine the'knife to any required position fordi ferent lengths of forms. Each of the gages 51 and 54 maycomprise a clip 65, whereby it is held-upon the stall 56, holding the gage against accidental motion while permitting it to be adjusted along the staff.

It will be seen that all of the web-gaging and web-severing members may constitute a unit-which is attachable to the platen-frame by the screws 61 usually inserted in said frame in said Underwoodmachine, and that no alteration of the platen-frame is necessary or any displacement of theplaten for the purpose of straightening out the composite web.

The web may be guided laterally by means of side gages 66 adjustable along a transverse rod 67 and secured by thumbscrews 68, said rod extending betweent-he arms 3-1 and rigidly connecting them. The gages '66 are adjustable for different widths of web or fordifferentwidthwise positions thereof. At

guided laterally by adjustable side-edge guides 69, which are usually attached to a head or rolled brim 70' formed upon the upper edge of thejpaper-shelf 16 in said Uri-'- derwood typewriter; said guide 69 usually having 'a hook-71 catching around said bead. There may be also provided on each of these detachable side guides 69 a finger 7 2 extending inwardly and projecting over the side edge of the web to confine it against rising, and also to serve asa side gage.

It will be understood that when the web isbeing moved between the positions seen at Figures 2 and 4, the typewriter carriageshould be in such a position that the web, when viewed in plan, as in Figure 6, will be straight throughout and its for-ward part not skewed relatively to its rear part. For

the typewriter carriage the webs may be this purpose the carriage may be. located in a central position by the aid of a carriage centering device, which may comprise a centering index'T l fixed-upon the typewriter carriage 12, and a -co-operative index 75 fixed upon the machine-frame by means of a screw 76, which usuallyfastens the front scale 7 7 the index 74 being held by a screw 78, which is usually provided upon the typewriter carriage for another purpose.

' For severing the side edges of fan-folded webs, the ends of the carbon-blades 29 may be provided with diagonal knives 79 in a manner known in this art; the slitting of the webs being performed by these knives after the. parts are in-the positions seen at Figure 4, and after the rolls 20, have been restoredto the platen, and while the platen is being rotated to draw forwardly the webs to the position at Figure 1.

7 As it is often desired to' perform difi'erent kinds of work inalternation upon the machine, the web may be detached, together with the carbon-carrier33, and another web with another set of carbons substituted. To facilitate this change, the carbon-carrier isheld upon the frame 34,37 by, means of thumb-screws 80, whic'h'hold down. a plate 81 upon cross-bar or plate 37; the stepped block- 33 being fastened upon the top of said plate 81, one at each end. by rivets or other means, as shown. It will be seen that,

by taking out the thumb-screws 80, the carbon-carrier, including parts 33, .81, may be removed, together with the carbons 1 and work-webs, and the webs may be drawn out from the typewriting machine and another carbon-carrier with another web may be substituted in the machine.

Since the rear ends of the carbon loops. are secured to the stationary straighteningout frame, while the forward ends of said loops are fed around the platen, each carbon loop is long enough to give the desiredsidewise swing of the slack in'rear of the typewriter, and to extend around the platen far enough for the typingof the last'line on the work-form. Only the forward por-* tion of the carbon loop is used. -It is evident that each carbon loop may be removed and turned end for end, thus bringing a 'fresh area of the carbon into use. If" desired, the carbon loop may be manufactured with carbon on only its front portion, leaving the main portion of the loop uncarbonized, for economy.

It will be noted that the means for withdrawing the carbon loops does not entail the addition of any mechanism or weight to the typewriter carriage, and the necessity of making a special carriage is avoided, while there is preserved the advantage of asidewise swinging loop which is line-fed at its front endwhile stationary at .its rear end; the work-web remaining in engagement with the platen when the loop-supporting frame is in its extreme rearward position, so thatthe platen and feed-rolls may be employed if desired for the purpose of advancing the work-webs independently of the carbon loops.

Variations may be resorted to within' the scope of-the invention, and portions of the improvements may be used without others. Having thus described my invention, I

claim:

- 1. In a typewriting machine, the combination of a rotatable platen, a letter-feeding carriage therefor, and a support at the in- I at the introductory side of the platen for supporting the rear end of a loop or slack of multiple-ply work-web interleaved with thecarbons, the front end of the loop being connected to the platen, and said loop-support being stationary during the travel of the carriage, of means to move said loopsupnort backwardly to straighten or lengt platen.

tion of another carbon-holder hens and web-plies.

en out the loop and pull the composite web backwardly to clear the carbons from the typewriting mechanism, while the leading portion ofthe work-web remains upon the 3. In a typewriting machine hating a rotatable platenand a letter-feeding carriage therefor, the combination with a support are attached, said support mounted at the introductory side of the platen for supporting the rear end of a loop or slack of multiple-ply work-web interleaved with the carbons, the front end of the loop being connected to the platen, and said loop-support being stationary during the travel of the carriage, of means to move said loop-support'backwardlyto straighten or lengthen out the 9 or holder to which the rear ends of carbons loop and pull the composite web backwardly to clear the carbons from the typewriting mechanism, while the leading portion of the work-web remains upon the platen, and releasable means co-operating with platen for advancing the web relatively to the carbons.

4. In a typewriting machine having a rotatable platen and a letter-feeding carriage therefor, the combination with a support or holder to which the rear ends of carbons are attached, said support mounted at the introductory side of the platen for supporting the rear end of aloop or slack otmultiple-ply work-web interleaved with the carbons, the front end of the loop being con--- nected to the platen, and said op-support I being stationary during the travel of the carriage, of means to move said loop-support backwardly to straighten or lengthen out the loop and pull the composite web backwardly to clear the carbons from the typewriting mechanism, said loop-support including a part detachable, together with the carbons and web, to permit the substituwith other car- 5. In a typewriting machine, the combination with a' revoluble platen, feed-rolls to the run thereon, and a'carriage for said p'laten,

of a rearwardly movable frame at the introductory side of the platen, a set of carbon-blades or holders upon said frame between which plies of work-web are threaded, said frame bein stationary during all the letter-feeding an linefeeding movements of the carbons and work-web, and being, shifta-ble rearwardly toclear the carbons from the platen, and means to limit the rearward movement of said frame.

6. In a typewriting machine, the combination with a revoluble platen, feed-rolls'to.

run thereon, and a carriage for said platen, of a rearwardly movable frame at the introductory side of the platen, and'a set of carbon-blades or holders upon said frame between which plies of work-web are threaded,

said frame said frame being stationary during all the letter-feeding and line-feeding movements of the carbons and work-web, and being shiftable rearwardly to clear the carbons from the platen, said carbon-blades or holders being detachable as a unit from'said frame, together with the carbons and workweb, preparatory to the substitution of a diiierent unit with other carbons and workwe 7. In a typewriting machine, the combination with a revoluble platen, feed-rolls to run thereon, and acarriage for said platen, of a rearwardly movable frame atthe introductory side of the platen, and a set of carhon-blades or holders u on said'frame between which lies of wor '-web are threaded, eing shiftable rearwardlyto clear the carbons from the platen, and said frame having a shelf or bar' over which the plies of work-web hang in rear of the frame.

8. A typewriting machine having a line-,

feeding platen and a carriage therefor, a frame or support at the introductor side of the platen, the letter-feeding an linefeeding movements of the platen being independent of said frame or support, the latter carrying by its rear end a composite loop of work web and carbons while the forward end of the loop is line-spaced with the platen, meansv connected to said frame for shifting it rearwardly, to straighten out the loop and clear the carbons from the platen, and a bracket upon which said frame is mounted, said bracket forming an attach ment for the typewriting machlne.

9. A typewriting machine having a linefeeding platen and a carriage, therefor, a-

frame or support at the introductory side of the platen, the letter-feeding and linefeeding movements of the platen being in dependent of said frame or support, the latter carrying by its rear end a composite loop of work-web and carbons while the forward end of the loop is line-spaced with the platen, means connected to said frame for shifting it rearwardly, to straighten out the loop and clear the carbons from the platen,

and a bracket upon which said frame is mounted, said bracket forming an attachment for the typewriting machine, and including arms which are removably secured tothe bottom of the typewriting machine by means of its rubber feet.

10. A typewriting machine having a linefeeding platen and a carria etherefor, a frame or support at the intro uctory side of the platen, the letter-feeding and line-feeding movements of the platen being independent of said frame or support, the latter carrying by its rear end a composite loop of work-web and carbons while the forward end of the loop is line-spaced with the platen, means connected to said frame for shifting it rearwardly, to straighten out the loop and clear the carbons from the platen,

and a bracket forming an attachment for the typewriting machine, said frame pivoted to said bracket to swing backwardly and'forwar'dly thereon.

11. A typewrit-ing machine having a linefeeding platen and a carriage therefor, a frame or support at the introductory side of the platen, the letter-feeding and linefeeding movements of the platen being independent of said frame or support, the latter carrying by its rear end a composite loop of work-web and carbons while the forward end ofthe loop is line-spaced with the platen, means connected to said frame for shifting it rearwardly, to straighten out the loop and clear the carbons from. the platen, and a bracket forming an attachment for the typewritlng machine, said frame having arms and across-bar connecting them at their upper ends, and also having a rock-shaft to which the arms are fixed at their lower ends. and said rock-shaft,- journaled in said bracket. 7 Y

12. A typewriting machine having a platen and a carriage, a bracket removably attached to the framework of the machine, a carbon-holder mounted on said bracket in rear of the platen and stationary. during the platen movement-s, and-a handle mounted upon said bracket and connected to said carbon-holder to shift the'same rearwardly.

13. A typewriting machine having a platen and a carriage, a carbon-holder in rear of the platen and stationary during the sition.

15. A typewriting machine having a platen and a carriage, a carbon-holder in rear of'theplaten and stationary during the platen movements, a lever, a link connecting said lever to said carbon-holder and co-operating with the lever to form a toggle locking the carbon-holder in its rear position, and stops limiting the forward and backward movements ofsaid lever. 4

16. In a'typewriting machine,.the combination of a rotatable platen, a letter-feeding carriage therefor, a,support at the'introduct'ory'side' of the platen for supporting the rear end of a composite loop of multipleply work-web and carbons, the front end of the loop being connected with the platen,- said loop-support being stationary during the travel of the carriage and being movable rearwardly of the web to straighten out the ,loop, and means locking said loop-support against movement either forwardly o'nbackwardly when in its rear position.

17. The combination with a typewriter platen, of me ns for holding a loop of composite web by its rear end while its forward end swings edgewise and feeds forwardly around the platen, means for moving the loop backwardly to straighten it out and to pulLthe composite web'back from the platen,

v and means for pulling-forward the work web relatively to the straightened-out carbons.

18. A detachable set for a typewriting machine having a travelingplaten-carriage,

including a bracket attachable to theframework of the machine, a loop-forming and straightening frame mounted, upon said bracket at the introductory side of the platen and movable forwardly and rearwardly, but

stationary with respect to the typewriter carriage, and a detachable work-supporting device mountable upon the platen-carriageof the typewriter at the delivery side of the platen and, provided with gaging means for the leading edge ofthe web.

19. A detachable set' for a typewriting machine having a traveling platen-carriage,-

including a bracket attachable to theframework of the machine, aloop-forming and straightening frame" mounted upon said bracketat the introductory side of the platen and movable forwardlyand rearwardly, but stationary with respect to the typewriter carriage, a d tachable work-supporting device mountab e upon the platen-carriage of the typewriter at the delivery side ofthe platen and provided with gaging means for the leading edge of the web, and a set of carbon-holding blades'mounted upon said frame and detachable therefrom.

20. A detachable setfor machine having a traveling platen-carriage, including a bracket attachable to the framework of-the machine,'-a loop-forming and straightening frame mounted upon said bracket at the introductory side ofthe platen and movable forwardly and rearwardly,'but stationary with respect to the typewriter carriage, a detachable work-supporting device mountable upon the platen-carriage of the typewriter at the platen and provided with gaging means for -the leading edge of the web, and side gages for the composite web attachable .to the paper-shelf of the typewriting machine, saild side gages having fingers to overlie the we s. i

21 A detachable set for a typewriting machine, comprising a bracket attachable to the framework of the machine, a loop-formmg and stra ghtening frame-mounted upon said bracket at the introductory side of the detachable work-supporting v able upon the platen-carriageof the typedelivery side of the platen and movable forwardly and rearwardly, a detachable work-supporting device mountable upon the platen-frame of the typewriter at the delivery side of the platen, and means upon said bracket for moving the frame rearwardly and forwardly.

22. In a typewriting machine, the combination of a rotatable platen,

ductory side of the rear end of a composite loop of multipleply work-web and carbons, the front end of the loop being connected with the platen,

said loop-support being stationary :during the travel of the carriage and being movable rearwardly of the web to straighten out the loop, and means forlocating the carriage a letter-feeding, .carriage therefor, a-support at the introplaten forvsupporting thewith the portion of web thereon in line with the portion of web upon said support.

23-. A detachable set for a typewriting machine having a platen-carriage, including a bracket attachable to the framework of the machine, a loop-forming and straightening frame mounted upon said bracket at the introductory side of the platen'and movable forwardly. and rearwardly, but stationary with vrespect to the typewriter carriage, a

device mountable upon the platen-frame of" the typewriter at'the delivery, side of the platen and provided with aging means for atypewriting the leading edge of the we said work-sup porting devicehaving upstanding bars at its ends, and a web-severin knife adjustable up and down on said ars for different lengths of printed forms.

25. A detachable set fol-a typewriting machine, comprising a bracket attachable tb the framework of the machine, a loop-foray ing and straightening frame mounted upon said bracket at the introductory side of the platen and movable forwardly and rearwardly, a detachable work-supporting device mountable upon the platn-frame of device mountthe typewriter at the delivery side of the platen and provided with gaging means for the leading edge of the web, said worksupporting device having upstanding bars at its ends, and a web-severing knife adjustable up and down on said bars for different len 'ths of printed forms, a carbon-blade holder being detachably mounted on said frame and detachable therefrom, together with the composite web,- for substitution of another carbon carrier and composite web.

26. In a typewriting machine having a rotatable platen and ,a letter-feeding carriage therefor, the combination with a sup-- port or holder to which the rear ends of carbons are attached, said support mounted at the introductory side of the platen for supporting the rear end of a loop or slack of multiple-ply work-web interleaved with the carbons, the front end of the loop being connected to the platen, and said loop-support being stationary during the travel. of the carriage, of means to move said loopsupport backwardly to straighten orlengtlren out the loop and pull the composite web baekwardly to clear the carbons from the typewriting mechanism, while the leading portion of the work-web remains upon the platen preparatory to advancing the web independently of the carbons, a gage forthc leading end of the web to determine the extent of independent advance. thereof, said loop-support being movable forwardly to make a new loop, and a second gage for the leading end of the web to determine the extent of advance *of the composite web around the platen to bring the first'typing line of the new form to the printing point, said gages independently adjustable relatively to the printing line of the platen.

27. In a typewriting machine, the combination of a rotatable platen, a letter-feeding carriage therefor, and a support at the in troductory side of the platen for supporting the rear end of a composite'loop of multipleply work-web and carbons, the front end of the loop being connected with the platen, said loop-support being" stationary during the travel of the carriage and being movable rearwardly of the web to straighten out the loop, said loop-support having carbonblades, and web-slittingknives being provided upon said carbon-blades.

28; In a typewriting machine, the combination with a revoluble platen, feed-rolls to run thereon, and a carriage for said platen,

' of a ,rearWardly-movable .fra'meat ,the in troductory side of theplaten, a set of car "hon-blades or holders upon said fran'i'e between which'plies of 'ivork-web' are threaded, said frame being stationary during all the letter-feeding and line-feeding movements of the carbons and work-web, and being shiftable rearwardly to clear the carbons from the platen, and means to limit the rearward movement ofsaid frame, said frame having across-bar, and said CtlllJOll-bliUlQS being mounted upon a plate, and screwsor devices detachablyholding said plate upon said cross-bar.

29. In a typewriting machine, the combination of a rotatable platen, a letter-feeding carriage therefor, and a support at theint-roductory side of the platen for supporting the rear end ofa composite loop of multiple-ply workwveb and carbons, the front end of the loop being connected with the platen, said loop-support being stationary during the travel of'the carriage and being movable rearwardly of the web to straighten out the loop, said loop-support having carbon blades, and loops of carbons upon said blades, each carbon-loop having carbon on only its front portion.

3th In a typewriting machine,the combination of a rotatable platen, a letter-feeding carriage therefor, and a support at the introductory side-of the platen for supporting the rear end of a composite loop of multipleply work-web and carbons, the front end of the loop being connected with'the platen, said loop-support being stationary during the travel of the carriage'and being movable i'earw'ardly of the web to straighten out the loop, said loop-support having carbon blades, each ofsaid blades having a lengthwise reversible carbon-loop having carbon on itsfront and rear portions and an extcnsive intervening blank portion.-

31.111 :1 typewriting machine, the combination of a rotatable platen, a earriage,a rear loopsupporter to which the rear ends of carbons are attached, said supporter stationary with respect to the carriage travel but movable backwardly for withdrawing the looped carbons and interleaved plies of a typed work-web form preparatory to advancing the typed web independently of the carbons, a gage at .the delivery side of the platen to measure the extent of such independent advance-of the typed web relatively to the stationary carbons, a second gage to measure the extent of subsequent advance of the typed web to a Web-severing position and the composite web and carbons to a new typing. position, and a blade positioned above the first gage for severing the typed web-form when set to the second gage.

32. In a typewriting machine, thecombination'of a rotatable platen, a carriage,'a

rear loop-supporter tov'vhich the rear ends of carbons are attached, said supporter stationary-with respect to the carriage-travel but movable backwardly for Withdrawing the looped carbons and interleaved plies" of, a

typed work-web formpre'paratory to advancing the -iv'eb independently of the carbons, a gageiit the delivery side of the platen to measure the'ext'ent of such independent advance of the typed web relatively to the stationary carbons, a' second gage to'measare the extent of subsequent advance of the typed Webjto a p ob-severingposition and the composite web'and carbons to a new typing position, and a blade positionedover the first gage for severi-ngthe typed wb-form *when set to the second gage, said blade adjustable to and from said second gage to accommodate various lengthsof forms.

33. The combination in a typewriting maxrhine having a web-feeding platen, of means for holding a loop of'composite web at the rear of the platen while the forward end of the Web feeds around the platen for typing, means for straightening out the loop and pulling the composite typed Web rearwardly of the platen to strip the carbons a carbonlocating gage for engaging the end of the typed web to relocate the carbons within 10 tle more than. a forms length nearer to the 15 platen than is the-, web-severing gage.

BURN} e. sTIeKNE-Y.

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