US1651050A - Typewriting machine - Google Patents

Description

Nov. 29, 1927.

J. WALDHEIM TYPEWRITING MACHINE Filed July 31. 1924 2 Shekels-Sheet l Nov. 29,A 192 7. f

' J. WALDHEM TYPEWRITING MACHINE A Fi1ed-Ju1y-31, 1924 2 Sheets-Sheet 2 Figi' FIRST BILL SECO/VD BILL Patented Nov. 29, 192'?0 im STATES Leste-t vPATam OFFICE.

JOHN wALnnnrM, or'ntIzAnrirn, .Nnw JERSEY, AssrGNon- To UNnnnWoon 'infra-A v'vnrrnn COMPANY, OF Nnw roma, N. v ,lA CORPORATION or DELAWARE. v

.TYrnwnr'rINe IMAoHrNnf Appiication ined July si,

This invention'relates to improvements in novel mechanism. designed t0 permit 'fa fan- 'folded work-web, such as is used in bil/ling typewriting machines, to be plroperly gage according to the length of eac printed form on the web, and then ldet-ached as fast as they have beentyp'ed.

The present. invention 'finds particular embodiment in a standard Underwood typewriting machine wherein provision is made `for slitting several folds ,of a fan-folded web, and auxiliary ink-ribbons 4are employed for manifolding purposes instead of Vthe usual individualv carbon-sheets 'interleaved between vthe several plies of the v'fan-folded web'. In this way it has been found possible to get rid ofthe usual carbon-carrier employed to carry along the work-web towards the platenY andA also to eliminate the usual table'upon which the carbon-'carrier travels, thus simplifying the mechanism fand Areducing its cost.` l Y Heretofore it .has been the practice to mounta plurality'ofrfan-fol'd s'litter's either on the carbon-carrier or on other traveling mechanism at the rear `of the platen, thereby providing means for imparting motions to the `sli'tt'ers for severing l.the folds of the work-web. Y It is'one of Vthe features 'of the presentinvention to still :make use of that type of machine described above wherein an auxiliary ink-ribbon' replaces v.the usual manifolding carbon-sheets; and fur,

ther to provide, as ,a'novel :andffdistinct .im-

provement, a means for performing the .'slitting function without the use of a carrier vor the like upon which the slitting knives are mounted. In carrying out this improvement the slitting'` knives are tiXedly-mounted in position just below the printing line of the platen. y Whenever fan improvement has been worked in anyior all of the foregoing types of machines inv the direction of preventing or overcoming the tendency of the platen slipping with respect to the workweb 'it is designed to ycarry forward up vto printing# line position owing to the inertia induced by the weight of the carbon-carrier'or other` carrier vand the weights of :the composite work-web and the -carbon-.sheets interleaved between the plies thereof, a loop or slack has been produced back of said platen, thus carrying the work-web upto whereby to enable l I` 1924. 'SerialNm 729,329.

permitting thisloo'ped portion of the workweb vto be taken 'up line by lineduring the line-spacing action of .the platen until the yoccasion arises forl relooping a fresh portion of 'this web.. -When the slipping of the platen relatively to the work-'web lwas overcome by means of this loop, the loop was formed by means of the carrier carrying the slitting knives in thetype of vmachine employing the auxiliary ink ribbon lto replace the 'carbon-carrier; otherwise the carboncarrier was retained with the individual carbon-sheets yand Ameans was provided for moving `.the carbon-carrier simultaneously with the platen during the'line-'spacing ac- )tion of the latter in :a manner to allow V'said carbonecarrier to"begin'its movement just previous to the rotative action of theplaten, so that slack is -introduced upon the work# web by means of the .carrier which is Aiirst taken up by the platen as itrotates before the printing lifne of the machine.

The present .invention for improvement employs nei-ther mode of .creating slack upon 'work-web .of a length equal -to'that of any -of the variable 'lengths vof lthe printed forms just prior to the same being carried along by the platen to printing-line position, this means including :a platen :sweep ,for "rap- 'idly effecting a reverse .turning of the platen to carrythe web 'rearwardly 'thereor` while a portion of Ythe web. is held stationary, the platen to create Ythe loon.v

A newv problem is'zintroduced in devising the present vne'clranismthat has not .heretofore `existed, vbecause lpreviously in forming ra loo-p in back `of the platen some device was necessary for moving back :a portion of the web'upon itself while another portion was held in engagement with the platen .by .means of the pressure rollers .at the bottom of ythe platen; and tit was :also necessary to perform two. separateoperations in connection with i'irst gaging the predetermined Vlengt'lri of the web Lcorresponding to the lengthv of'a printed iform 'thereon before .the loop formed j f and before. the typing action. occurred, and

thereafter again gagingv the; same printed form of the web after it had' been typed, so that it might be detached.,

The present invention nowr makesit possible in one operation togage simultaneously the length of the printed form that is rto be looped and advanced to printing-line position for the typing operation, and .also to gage .the length of the printed form that has already been typed prior to severing the same by means of the usual tearing-off knife, thereby effecting' an important economy in. such type of machine. This doublegaging action is accomplished by the lact ofthe typist drawing upon thetyped p01'.- tion of the web to bring the same against the leading-edge gage. This operation alone isresponsible for gaging tivo lengths of two printed forms on the web at the same time, so that the typed form is not gaged and detached yuntil after therehas been gaged also' at the same time with the gaging of the typed form the next succeeding printed form that is ready to be typed and looped for that purpose." During the gaging operation referred to, the slitting knives -printed form on the web. Thetypist `actu. ates this handle, andthe result is to pull j have severed the folds of the web, thus permitting free action of the platen for linefeeding the work-plies between the ribbons.

The present invention-by successive stages of operation serves to precondition the workweb for an ultimate severing action as fol-- lows z--Whenthe machine is started in use with the work-Web properly held in engage- -ment with the platen by the pressure rollers,

the web is first drawn upon so that its leading edge is presented against the adjusted gage above the platen until the length of twoprinted forms of the web has been gaged with the division line between the second and third'printed forms locatedfin registration with the edge of a tearing-off knife. Adjustable means are provided for imparting to a handle located adjacent the platen a selected throw. depending upon and corresponding to the. length of one the looped printed form is gradually taken up line by line and will occupy the identical position just occupied by that printed and gaged. form which-.has valready `been detached, so that its division line, .with the next preceding form, is located in registration with the tearing-off knife, but before being detached this time the web is drawn,

again and its'leading edgepresented against the gage, thus gaging the length of tlie next printed form about to be looped and then typed. After lthis is done the handle is again operated, and a loop is formed upon the untyped printed form, and. the typed printed formn may no'w V be served.

' A, still furtherfeature of this invention is the provision of novel means for positioning the slitters relatively to the platen beneath the printingv line of the machine, and

to position the auxiliary ink-ribbon thereadjacent. To this end supports are mounted upon the ends ofthe platen-frame and carry angular arms, the terminals of which provide theslitters, said arms also supporting hooks upon which the ends of the auxiliary ribbon are secured.

Another feature of this invention is the provision of means for-preventing a sheet interposed directlyv between the main and auxiliary ribbons of a typewriting machine from receiving typed impressions upon both sides thereof. Said means is positioned along the length of the auxiliary main ribbons so as to extend across the lines of the sheet to be typed.

Other features and advantages will hereinafter appear.

' In theaccompanying drawings,

Figure 1 is a front elevation of the invention positioned upon a typewriting machine. Figure 2 is a fragmental sectional view of one end of Figure 1.

t Figure 3 is an end View of a fan-folded web, showing the interposed ink-ribbons diagrammatically.

Figure 4:' s an'end elevation of Figure 1,

taken on the line 4-4 thereof. i

Figure 5 is a view similar to Figure 4, showing the formation of a loop upon a web. Figure 6 is a front elevation, partly broken away, of means for supporting the auxiliary ribbon and slitters about to be described.

A paper-gage arm or rest 10 is secured at its lower end upon a portion of the platenframe11 by means of fasteners 12 engaging a bracket 13 vextending across the front of the machine and having integral. lugs 14 secured by fasteners'l to the top plate 11a' of the platen-frame. .16 designates depending webs formed upon the top plate 1121 and being, respectively, provided with pins'17 projecting through openings 18a 'formed upon plates 18, which overlap said websclb. As means for removably securing the plates 1S upon the platen-frame, screw bolts 19, also mounted upon the webs 16, project through other openings 182l in the plates 18, and receive the knurled nuts 20 in threaded relation, so as to hold the Side plates against vertical displacement from said webs.

lill* ieu The platesl are formed with depending shanks 21, which are formed Integrally'with V angularly projecting arms 21a, which project toward each other and. toward the center of the machine, andupstanding hooks or fingers .23 are formed upon the ar`ms *211 at the inner ends of the latter for a purpose,

hereinafter described. lThe terminalsof said arms 211 yare extended at an angle thereto so as to converge downwardly, having their' o uter edges 22a shaped into slitting or cutting edges to form the knives 22. Supplemental hooks or fingers 23a may also be formed and supported upon the arms 21a ofthe plates 18 in amanner shown only diagrammaticall in Figure 3. An' Iauxiliary ink-ribbon 2 has `its ends 27.1 vlooped or otherwise secured'around the hooks or iingers 23, which are preferably Aextended and.

enlarged as illustrated, or it maybe secured thereupon in the shape of an endless band which may. be advanced or fed along by Iany desirable means not shown. Similar auxiliary ribbons maybe mounted upon the aux- CII I along the printing vline y.fand thatmakes 4impressions upon the :auxiliary ribbon 2T. 31..

designates the paper-shelf of usual form on the vintake `side of av platen" 60, extending downwardly around the under side thereof.

Thev uper edge of the shelf has a loop or `bight 32. 4designatesl a .base-plate, whichv is =secured by fasteners 34 tofthe under side ofsaid shelf, said plate/having an upwardlyextendiug arm 35 carrying-k a rod 36 on 'which are secured holders i3? having .trunnions 38, upon whichare E'snuglypiit'ted ears 39 on lthe loopedportion `40 of a breast plate 41 `:extendingjuponsthe 'opposite side of vthe shelf, with its terminal'resting thereupon.

A similar breast p late 41, with the described attachments rfor vengaging :said shelf, is A also located upon the shelf, .so.that the two breast plates may be radjusted transversely of the shelf tby means of the .holders 37 slidably engaging the rod `36.` Guide-flanges y42 are preferably struck upwardly at right :angles upon A'one longitudinal edge of each breast plate 41 and terminate short of Lone end thereof, and at this endA there is .looped `around the-same vedge `upon which the lflanges -42 are V.formed members 43, also providing guides in continuation of the gu'ide-anges. because the'bights lof :the .looped members 43 'are substantial-ly vin alignment with said flanges. The bends 44 of .the looped members 43 extend -laterally toward the medial line of `said breastfplrates and are formed with downwardly-extending leaf-springs 45 projecting-A longitudinally of said breast plates. The pfingers 45 of said springs yieldably engage said breastpl'ates, so that a fanfolded web o r other sheet 46 movin upon said shelf is causedto engage the plooped portion v` of said breastvplates, which extend around the looped portion or bight 32 of the shelf, the looped members 1,43 being secured by fastenings 44a to the looped portion 4() of the breast plates.

A standard or pin plate 47 extends upwardly and is supported upon one of the top plates of the platen-frame, and is formed with an arcuate series of holes 48 receiving a stop pin 48a, which is removable to selectively determine the extent ofmovement of a handle lever 55, which is initially' positioned against another sto pin 49 also secured upon the standard 4 A lug 50 depends from the platen-frame, which carries a fulcrurn pin 51 having a head 52, and operatively andfixedly coiled around said pin or hub is a spring 53 having `one terminal or finger 54 secured uponthe top plate 11a at h, and havingfits opposite terminal or `finger 54 secured -upon the lev-er 55, which carries the usual finger-piece 56. i A sector gear 57 is carriednby or formed upon the lower end ofthe lever 55` which is fulcrumed upon the fulcrum' pin 51. This sector gear 57 is permanently in mesh with a pinion 58 loosely mounted upon a'platen-shaft 59 upon which the platen 60 is fast, `so as to rotate therewith.' The platen sleeves 61 are .secured .around the shaft 59 by fasteners 62, and upon this vsame shaft, butspaced away from vone of the'sleeves 61,is aicollar 63 also fixed- 1y `secured upon the terminal of said -shaft- 559 by fasteners 65, 4so that by turning a handknob 64,mo`unted upon the collar 63, the platen-.shaft 59 is rotated and with it the platen V60. this rotation occurring independently of the pinion 58 during the line-spacing action of the. platen for the purpose of 'feeding the web 46 beyond or "above printingline position. A ratchet-Wheel 66 is fixed upon ,the -collar 63 vso as to rotate therewith. A ysuitable clutch is provided for causing the ratchet-wheel to move when `the sector 'gear 57 is actuated. It 'will be seen that thecollar 63 holds another collar 67, (fixed upon, fso as to rotate with,'the pinion hub 58a) and `the pinion itself against longitudinal displacement from the :shaft '59. The clutch consists of a pawl 7 0 iforlmeddon one arm of a bell-crank lever 70a Vfulcrumed upon fa pin x69 secured to an armor lever 68 carried by the collar 167., the other arm 73 of said lever 70a providing .an operating piece and engageable by the toe or abutment 77 of a hooked shank or arm 76 disposed -fconcentrically with the pinion 58 land carried by 1an arm '75 secured by fasteners 74 upon the sector gear 57. Normally the spring 53 holds the lever handle 55 in the position Shown clearly in Figure 4 against the pin 49, thereby disposing one end of the sector gearl .But for the engagement of the hook 76 with the lever arm 73, the pawl would b e permanently inengagement with the ratchetand in a position to drive the same around with it for rotating the platen. The arm v68 is vconstrained to move with the` pinion 58 in aclockwise direction as distinguished from the c'ounterclockwise movement which the platen has as it is line-fed, this movement being imparted to the pinion by the sector gear 57, but when all the parts ,are at rest the pawl 70, as explained before, is outy of engagement with the ratchet-wheel 66, so

that even after the platen is being line-fed rotatably in a counterclockwise direction,

the position ofl the sector gear, pinion and pawl will remain undisturbed.

The tearing-off knife 78 is positioned as shown in Figure 4 above the printing line and above the ribbons` while the slitters or knives 22 are positioned immediately below said ribbons. The usual pressure rollers 25 and 26 hold the traveling web tensioned against the under side ofthe platen 60 in the usual way. Adjustably mounted upon the gage or paper bar 10 is a gage 79 located in edges thereof aremaintained against the in adjustable position by means` of a setscrew or knurled nut 80. Formed upon the arms 218l of the plates 18 are hooks 81 for holding the ends of a 'shield 82, which is in the shape of a strip extending in longitudinal alignment with the auxiliary ribbon or ribbons 27 as the case may be and' in front thereof. The tearing-olf knife 78 is secured at its opposite ends by fasteners 782L upon the lugs 83 formed integrally upon the web 16. as shown in Figure 1.

In operation the fan-folded. web, positioned as hereinbefore described, is unrolled or unravelled from its source of supply and the folds of the web slit in any convenient manner a suilicient distance to permit threading the plies between the auxiliary ribbons.

40 of the breast plates 41, so that the opposguide iianges 42, `which 'have been adjusted upon the shelf, and so that the web passes between the spring-fingers 45a and the shelf, and is pressed under tension against the latter as it moves, or may be held stationary at this point. The web is drawn down from the points' where it is -held by the springfingers 45a 'and may then be fed around by' the rotatable platen 60, so as to cause the i,eenoso plies of the web to move past and between` the auxiliary .ink-ribbons '27 with \one of these plies between the main ribbon 28 and the next adjacent ink-ribbon 27. Beyond the ribbons and upwardly therefrom the webs are fed along by the platen to a point sufliciently above the tearing-off knife 78 t0 `permit the leading portions of the web to be grasped and pulled upward toward the gage 79. rIhus the slitting knives 22 which'project into the folds of the web 46 are caused to sever or slit these folds during the upward pull on the web.

The leading end ofthe web is brought to printed forms A and B, the form A may 'being designated B. In this position of the r have already been typed or not, but the form B has not been typed. and is about to be looped` for the purpose hereinbefore explained, and then typed.

In order to bring the form A back to the 4'tearing-off knife 78, the typist imparts a variable throw ormovement upon the lever 55 by means of the linger-piece 56, -so as to cause the lever to'move angularly ofthe standard 47 luntil stopped predeterminately of the pin 48a that limits its further movement or progress, it being lunderstood that the handle is automatically returned against the pin 49 by the spring 53. vAs soon as the lever 55 is thus actuated and plays between the pins 49 and 48, the sector gear 57 moves and causes the pinion 58 to turn in a platen-4 reversing' direction, thereby carrying the arm 68- along with it, and at the same time the hook 76 is'retracted from the lever arm 73, whereupon the spring 71, which has its terminal 72 secured to lever 68, will cause the pawl to click `into engagement with the teeth of the ratchet-wheel 66 Vduring thecontinued movement of the pinion, so that fingers y45 under tension, and alsopressed under tension against the platen by the pressure rollers 25 and-26. so that during this y -rotative movement of the platen 60 the web The web 1s led up over andaround the loop .fb

egins to move reversely or towards the spring-fingers 45, and this causes the`untyped printed form B to be carried along `downwardly relatively to the gage orpaper bar 10 around said platen and to pile up or lbe slackened in the form of a loop .46 in the ratchet begins to turn with the platen .while the web is engaged by the springaccurate registration with the tearing-off i lmife 78, so thatthe form Amay be dereaches its final position and rests upon thepin 49 the pawl remains' in this position, thereby allowing the platen 60 to be rotated during its line-space action 'by meansv f the usual hand-knobt to take up the looped portion 46a of the web, which is the untyped form B, until this form has been completely typed and occupies the `posltion shown-m Figure 5. The looped anduntyped portion of the web is .designated 46a in Figure 5.

'The typist now takes hold Aof form B already typed and does not detach it, but he draws the saineuntil its leadingedge engages the adjustable gage 79, as' shown in Figure 4. The lever 55 is again actuated as described, and this time lform C, which has occupied thesame position as form B"a`.fter

the latter has been pulled up to the gage, is looped behind the platen and now 'form detached alongy the tearing-olf knife 78. In

. a similar manner the platen is operated over and over again to form each separate loop as required.

In Figure' the purpose of the shield 82,l which is shown in longitudinal alignment with the auxiliaryv ink-ribbon 27 and in-'back of the main ribbon28, and which has a ply g of the web between it and the main ribbon, is

to receive the-'typedimpressions -from the main ribbon' 28,'which it transmits through the adjacent ply of the web to the ink-ribbon 27, so that the ply will not receive any carbon impressions upon any but theside intended to beread. The opposite ends of shield 82 are operatively looped or otherwise secured upon the auxiliary hooks or Afingers 81 formed on the arms 21a of the plates 18,'

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:

combination, a 'revoluble platen, a ,main ribbon, auxiliary ribbons, gold-slitting knives beneath thev ribbons, a lweb-'shearing knife vabove the ribbons, a' gage against'which the leadingl edge of the web. is brought to position, said gage` spaced e, two 'form-lengths.

above theshearing knife, a platen sweep for reversely turning the platen, and means for' holdin the web at a point on the intake sideo the platen. y

2. In a fan-foldtypewriting machine, in combination, a revoluble platen, a mainribbon, auxiliary' ribbons, foid-siiaing knives beneath said auxiliary ribbons, a web-shearing knife above said ribbons, a leading-edge gage two form-lengths above the shearing knife, a platen sweep associated with the platen and movable between 'selectable positions for reversely turning the platen, and

resilient fingers lightly pressing upon the web onthe intake side of said platen.

3.`In a fan-fold typewriting machine, in combination, a revoluble platen, alfmain ribon, auxiliary ribbons, fold-slitting' knives beneathsaid auxiliaryribbons, a shearing knife above saidribbons, a leading-edge age two form-lengths above the shearing ife, a platen sweep associated. ywith the platen and movable between Aselectable po sitions forreversely turning the platen, re-

silient vlingers lightly pressing upon the web on the. intake side of said platen, and side gages associated with said resilient lingers.

'4. In a fan-'fold typew'riting machine, in l combination, a revoluble platen, a papertable at the intake side of the platen, a main ribbon, auxiliaryY ribbons, vfold-slitting knives immediately below saidl ribbons, a-

shearing knife Aabove the auxiliary ribbons, a leading-edgegage aga-instwhich the web is positioned two form-lengths above the shearing knife, ajpinion associated with the platen,.a sector-gear meshing with said pinion, a lever for operating the sector-gear whereby to reversely turn the platen, resilient fingers associated -withthe rear paper-table and engaging the incoming portion of the web, and side gages .associated with the 'fingers for uiding the web.

5. In a fanold 'typewriting machine, in combination, a revoluble platen, a papertable at they intake side of the platen, a main ribbon, auxiliary ribbons, fold-slitting knives immediately below said ribbons, a shearing knife above the auxiliary ribbons, a leading-edge gage against which-the web is posiknife, a pinion associated with the platen, a sector-gear meshing with ,said pinion, a lever for operating the sector-gear, whereby to n reversely turnthe platen, resilient Ifingers associated with thepaper-table .andenga ing.'

the incoming portion of the web, side g ges web, and adjustable stops for controlling the extentof-movement of said lever.

i 6. In afan-fold typewriting machine, in-

combination, a revoluble platen, amain rib-v bon, auxiliary ribbons, fold-slitting knives' 'l associated with the fingers .for uidin the l. In a fan-fold typewriting machine, 1n b g g 4means for creating a loop of loose web behind the vplaterrand for bringingthe division line of therlirst form downto the shear-` ing knife, said means including a pinion revoluble on the platen-shaft, a sector-gear tioned two form-lengths above the shearing ,110'

meshing with said pinion, clutch mechanism between said pinion and the platen, means normally maintaining said clutch mechanism ineffective, said Sector-gear being movable tocause said clutch mechanism t0 become effective and to then movethe platen in reverse direction, and means for holding the web. at a point on the intake side of the platen.

7. In a fan-fold typewriting machine, in combination, a revoluble platen, feed-rolls, auxiliary ribbons, fold-slitting knives positloned at a point betweenv the feed-rolls and the ribbons, ashearing knife above the ribbons, a gage-staff, a gage thereon for the leading edgevof the web, said gage spaced two form-lengths above the shearing knife,

'means for reversely turning the platen, in-

cluding a handle swingable betweentwo positions and a clutch connecting said handle with the platen, the clutch being "ineffective when the handle is in'normal position, said clutch becoming effectiveupon actuation of the harfdle, and means for holding the web on'the intake side of the platen.

8. In-.a fan-fold typewriting machine, in

' combination, a revoluble platen, a shearing knife, a gagel two form-lengths above the shearlng knife, means for reversely turning the platen a distance to bring the first form down to Ithe shearing knife and carry the second form to the rear of the platen, and means co-operating Wirth said platen to cause said second form to-be looped.

9. In a fan-fold typewriting machine, in combination, a revoluble platen, a'main ribbon', auxiliary' ribbons, fold-slitting knives beneath the ribbons, a shearing knife above the ribbons, a leading-edge gage two formlengths above the shearing knife, means for reversel turning, the platen to bring the second oriri to the rear thereof, said means including a.pinion revoluble on the platenshaft, a sector-gear in mesh with said pinion `a lever for actuatlng sa1d sector-gear, a

ratchet-Wheel fixed to the platen, a pawl vmoving with said pinion and engageable with said ratchet-wheel, the pawl being normally inefective, and means associated with said sector-gear and the pawl, effective to cause said pawl to 'engage the ratchet-wheel upon actuation of the lever.

10. 4In a fan-fold typewriting machine, in combination, a revoluble platen, a platencarriage, a main ribbon, -a'plurality of anxiliary ribbons, fold-slitting knives beneath the auxiliary ribbons, a severing knife above the auxiliary ribbons, a gage two formlengths above the severingknife, and means for rotating the platen in a reverse direction, said means including a handle rockably mounted on the platen-carriage, adjustable stops associated with the handle for limiting the swing thereof, a sector-gear carried by said handle, a pinion freely revoluble on the platen-shaft and meshing with said sectorgear, a ratchet-Wheel fixed to the platen, an armf carried by said pinion, a pawl pivoted to said arm, means for throwing the pawl into engagement with the ratchet-wheel, and means associated with said sector-gear and normally holding the pawl out of engageknife above the ribbons, a leading-edge gage two form lengths above the shearing knlfe, and a platen sweep for reversely turning the platen a predetermined distance to bring the division line of the first form downv tothe shearingknife and to return the second form to printing position.

12. ln a fan-fold typewriting machine, in

combination, a platen-frame, revoluble platen, feed-rolls, a main ribbon, auxiliary ribbons, fold-slitting knives interposed between the ribbons and the feed-rolls, a shearing knife above the ribbons, a leading-edge gage two form lengths above the shearing knife, a handle 'swingably mounted on the platen-frame, normally ineH-ective clutch' mechanism between sa1d. handle and thev 18. In a fan-fold typewriting machine, in

combination, 'a revoluble platen, a main ribbon, auxiliary rlbbons, a shearing knife A'above the ribbons, a leading-edge gage above the shearing knife, fold-slitting knives immediately beneath the ribbons, and means` operable for reversely turning the platena predetermined distance to bring the first form down to the shearing knife and the Second form to printing position.

14. In a fan-fold typewriting machine, in combination, a revoluble platen, a main ribbon, auxiliary ribbons, and fold-slitting knives adjacent to and in advance of the printing line.

f15. In a fan-fold typewritingmachine, in combination, a revoluble platen, a main ribbon, a plurality of auxiliary ribbons, and fold-slitting knives beneath said auxiliary ribbons. I 16. In a fan-foldtypewriting machine, 1n combination, a revoluble platen` a. sei-ies of ribbons at the printing line, a above said ribbons, and fold-slitting knives -beneath the ribbons.-

17. In a fan-fold typewifiting machine, in combination, a revolublev platen, a main ribbon, across the platen, shields in front of the ribbons, the latter overextending the shields at both ends thereof, .and fold-slitting knives in advance of the printing line.

18. In a typewriting machine, nation, a revoluble platen around which a fan-folded work-web may be fed, feed-rolls beneath the platen, auxiliary ribbons extending the lengths of said vplaten at the printing line thereof, and web -slittingknives between the feed-rolls and the, auxiliary ribbons, whereby to sever the folds of the web as the web-plies are drawn upwardly ininterleaved relation-with all of said ribbons. l

19. In a fan-fold, typewriting machine, in combination, a revoluble-platen, a' main ribbon, auxiliary ribbns,- and fold-slitting knives closely-adjacent the ribbons and relatively disposed in.' advance of the same.

20. In a typewriting machine, the combi-. a shaft rotatably` nation`ofa platen-frame, t i mountedthereon', a rotatablev platen fast' on said shaft, a pinion freely rotatable on said shaft, an arm carried by said pinion,

a ratchet-wheel xed lupon said shaft, 'a pawl mounted on said arm, means'carri'ed by said arm for urging said pawl into en-l gagement with said ratchet-wheel, a sectorgear meshing with said pinion, a handle for actuating said sector-ge`ar, and an abutmentrigidly secured to said handle andA disposed to directly engage and hld said pawl out of engagement with said ratchetwheel tion, the abutment being withdrawn from the pawl when said handle is moved from 2l. In a typewriting machine, the'combination .of a' shaft, a platen fast on said shaft, a pinion freely rotatable on .said shaft, an arm fast on said pinion, a"'bellcrank lever on said arm, a pawl carried'by one arm of said bell-crank lever, the other arm of the bell-crank lever providing an operating piece for the pawl, a ratchet-Wheel' fast on said platen, a spring normally lholding said pawl in contact with said ratchet,- wheel, a gea-r meshing with said pinion` a spring `associated with said gear and holding it in normal position, a handle carried by `saidgear, and an arm rigidly securedy to said handle to movetherewithV and terminating in an abutment which engages said operating piece of the pawl to hold ,saidA pawll out of engagement with' said ratchet-wheel against the tension of` the pawl-holding spring, when said handle is in normal position, said handle being effective when moved. from said normal position'to causethe abutment to be withdrawn from said pawl-operating piece.

22. In a typewriting machine, the combia series of auxiliary ribbons stretched i in combi-- when said handle is in normal posipressing said web in engagement nation of a revoluble platen, a -paper-shelf `disposed thereadjacent', side gages .adj ustably mounted transversely of said shelf and guiding the opposite edges of a web engaged by said platen, springs carried by said ,side gagesl and applying light pressure upon said web against said shelf, and manually-operated means for rotating said platen whereby to return a portion of said web upon itself to. produce a loop of web between said springs and said platen, vsaid loop being maintained by reason of `the web holding -action of said springs.

24. In atypewriting machine, in combination, a revoluble platen, a'series of inkribbons extending along the 'printing line y thereof, and supports upon which the ends of said ribbons are detachably secured, said supports also .including slitting knives for severing the folds of a fan-folded work-web drawn upward around the platen with the 'separated plies threaded between the rib-` bons,l

.m 25. A fan-fold typewriting-machine, includin in combination, a platen-frame, a revolu le platen therein, a plurality of inkribbons adjacent the platen along the printing line formed into'loops at their extremities, projections mounted on said frame adjacent the platen to engage saidloops and support said ribbons, and fold-slitting knives disposed beneath the ribbons in adjacent relation to said projections.

26. A fan-fold typewriting machine -including, in combination, a frame and a revoluble platen therein, ink-ribbons disposed alongl the printing line of the platen, having loops uponvtheir'extremities, and supports upon said frame adjacent the extremities of said platen including fingers to support said loops extending beyond the adjacent edges ofthe loops and'enlarged to form arms project-ing beneath said ribbons and terminating in /fold-slitting knives conditioned to slit the folds of a fan-folded work-web be- 'fore the same reaches said ribbons.`

27 .xA fan-fold typewriting machine including, in combination, a frame and a revoluble platen therein, a fan-folded workweb conditionedfto be held in contact with said platen, a. plurality ,of ink-ribbons disposed along' said platen and provided with 'loops upon their ends, removable supports formed as a kunit with its divergently directed hooked ends, and -arms i mounted on the aforesaid frame including vertical lingers extending above .theadjacent edges of the 'loops and terminating 1n extending inwardly lbeneath said ribbons and terminating in fold-slitting knives conditioned'to slit the folds of the aforesaid workwebV below said ribbons.

28. In a typewriting machine, in combination, `a ,revoluble platen, va platen-frame, a

plurality of ink-ribbons extendingalong the printing line, removable supports carriedby the platen-frame adjacent both ends of the platen, said supports including upstanding hooks around which the ends of the ribbons '-are looped, ribbon-shields overlying said frame, ink-ribbons extending along the printing line, and means for supporting .said ribbons by their outer ends, including removable supports carried by the platen-frame,

- the supports including 4arms directed inw'ardly beneath the ribbons andterminating in fold-slitting knives, and supporting in-.

gers carried by said arms for receiving the ends -of the ribbons, each support being associated knife and finger.

30. In a typewriting machine, inv combination, a revoluble platen, a platen-frame, inkribbons extendingalong the printing line,

'and means for supporting said ribbons by their outer ends, including removable supports carried by the platen-frame, each sup'- port having an arm `directed inwardly r'beneath the ribbons, and supporting fingers projecting from said arms for receiving the ends of the ribbons, said arms terminating in slitting knives for severing the folds of a fan-folded work-web' kpulled upwardly around the platen.

31. In afan-fold typewriting machine, in combination, a revoluble platen, a platenframe, a removable support carried at each sfde of the platen-frame, each support including an arm directed inwardly beneath the ribbons, the arms being inclined downwardly adjacent their ends and having the lower edges thereof sharpened to form inclined fold-slitting knives, and a pair of upstanding ribbon-holding and shield-holding lingers positioned abreast along each suport.

p 32. A fan-fold typewriting machine, including, in combination, a platen-frame and .a platen mounted' therein, a fan-folded Work-web conditioned to be held upon said platen, a plurality of ink-ribbons disposed along the printing line of said platen, ribbon-shields of diEerent relative lengths than said ribbons located in proximate relation thereto, and supports adjacent the extremities of said platen including converging arms terminatin' in fold-slitting knives and provided with ngers disposed along the printing line at relative distances corresponding with the different lengths of said r`bbons and shields, said knives beingdisposed to slit the folds of the aforesaid work- Web beneath said ribbons.

33. In a typewriting machine, ifn combination, a revoluble laten, a series of ink-ribf bons extending t e length of the .platen along the printing line, hooks adjacent the platen-ends upon which. the ends of said ribbons are received and supported, shields overlying each of said ribbons, and hooks upon which the ends of said shields are supported, whereby to be attachable or detachable independently of said ribbons.

34. In atygewritingmachine, the combi- -nation of vp aten-frame,l plates-removably secured upon the ends ofsaid frame, 'angular arms carried by saidl plates-projecting t0- ward each other, a pair of hooks carried upon each of said arms, respectivel per-'y pendicularly thereof, an ink-ribbon liaving its opposing ends" looped ,upon the inner hooks, and a-sheld having its opposing ends secured upon the outer hooks of said plates so as to be positioned Lin 'front of and in longitudinal alignment with said ribbon.

'35. In a typewriting machine, the combination of a platen-frame havin side members, a pair of plates remova ly secured upon. said members, angular arms carried b saidplates and projecting towards eacii other, and angular slitting knives formed terminally upon said arms and converging downwardly.

36. In a typewriting machine, the combi- -nation'of a platen-frame having side members, a pair of plates secured upon said side members and depending therefrom, angular l arms carried by said plates and projecting towards .each other, upwardly-extending hooks formed upon said arms respectively, an ink-ribbon supported 'removably upon said hooks, and angular slitting knives carred by said arms, said knives having their cutting edges converging downwardly.

37. A typewriting machine including, in combination, a platen, an ink-ribbon, a shearing knife 'disposed above said ribbon, a. leading edge ygage spaced two fornilengths above said knife,a Work-web having a series of equal forms thereon, and a platensweep for registering the first form with said knife and looping. a portion of said web cated onthe intakeside of the platen, and a platen-sweep to reversely rotate the platen to loop a work-web between said web-retaining lingers and said platen. y

39. A fan-fold typewriting machine including, in combination, a rotatable platen, an ink-ribbon adjacent the same, a shearing knife abovethe same, aleading edge gage spaced two form-lengths above the shearing knife, a fan-folded work-web, and means to slit the folds of said web when the same Ais being brought up to engage said gage, in-

cluding fold-slitting knives spaced apart along said platen-in advance of said ribbon.

40. A` fan-fold typewriting machine including,"in combination, a revoluble platen, an ink-ribbon adjacent the same, resilient web-retaining fingers loca-ted on-the intake side of the platen, fold-slitting knives spaced apart adjacent said laten below said ribbon, a shearing knifle above the ribbon, a leading edge gage disposed two form-lengths above Vthe shearing knife, and asweep associated with said platen conditioned to re-v versely rotate the same and withdraw a web from said gage. j

4l. A fan-fold typewriting machine 'including, in combination, a revoluble platen, resilient web-retaining ngers located on the intake side vof the platen, an ink-ribbon adjacent said platen, auxiliary-ribbons disposed along the platen, fold-slitting .knives beneath said ribbons, a shearing knife above the ribbons, aleading edge gage spaced above said shearing knife, Aand a platen-sweep whereby the platen may bereversely turnedv to withdraw the leading edge of a work-web from the gage. 7.

42. A typewriting machine including, in combination, a revoluble platen, an ink-ribf bon adjacent the same, resilient web-retaining lingers located on the intake side of the platen, a shearing knifeJ` above the ribbon, a

leading edge gage spaced above said shearing knife, and a platen-sweep to reversely rotate the platen .in order to withdraw a work-web from said gage and loop a portion of the web between said-web-retaining lingers and said platen.

43. A fan-fold typewriting machine including, in combination, a revoluble platen, an ink-ribbon adjacent the same, resilient web-retaining fingers on the intake side of the platen, fold-slitting knlves spaced a art adjacent said platen, a shearing knife a ove said ribbon, a leading edge gage spaced two form-lengths abovesaid shearing knife, a fan-folded work-web for said machine, and means to withdraw said web from said ga e to `register a predetermined pointl within t e leading edge with the shearing knife and simultaneously loop a portion of said web between said web-retaining fingers and said platen'.

' 44. A typewritingl machine including, in combination, a revoluble platen, an ink-ribbon adjacent the same, a shearing knife located above theribbon, a leading edge gage spaced above said knife, and means to reversely move said platen tol withdraw the first formof a work-web from said gage and register the same with said knife, and move the second form to printin position and loop said web on the intake si e of the platen.

45. A fan-fold typewriting machine including, in combination, a revoluble platen, a main ink-ribbon, an auxiliaryribbon relatively stationary with respect tothe linespacing movements of said platen, a shearing knife disposed above said ribbon, foldslitting knives beneath the same ribbon, and a leading edge gage spaced two form-lengths above said shearing knife, there being means to withdraw a work-web from said gage.

,46. A fan-fold typewriting machine including, in combination, a revoluble platen, a'main ink-ribbon, an auxiliary ink-ribbon, a shield overlyino said latter ribbon, said `ribbon and shield rbeingrelatively stationary with respect-tomovements of said platen,

and fold-slitting knives spaced apart be' neath said auxiliary ribbon.

47. A fan-fold typewriting machine including, in combination, a revoluble platen, a main ink-ribbon, an auxiliary ribbon hav ing a superposed shield and being stationary relatively to rotative movements of said platen, `fold-slitting knives spaced apart beneath said auxiliary ribbon, a shearing knife above said ribbon, and a leading edge gage 'spaced more than a normal form-length above said shearing knife, there being means to withdraw a work-web from said age. JOHN WALDHELgM.

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