US1765503A - Typewriting machine - Google Patents

Description

June 24, 1930. J 5 SMlTH 1,765,5G3

TYPEWRITING MACHINE Filed Jan. 15, 1927 2 s t -sh I 1 67 INVENTOR:

ATTORNZ.

June 24, 1930. J A B -m 1,765,503

TYPEWRITING MACHINE Filed Jan. 15. 1927 2 Sheets-Sheet 2 INVENTOR:

4 73 WMZQ/JM- BY ATTOR Y.

Patented June 24, 1930 UNITED STATES PATENT OFFICE JESSE A. B. SUITE, STAMFORD, CONNECTICUT, ASSIGNOB TO UNDERWOOD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE mnwnrrmo maonmn Application filed January 1:, 1927.. Serial in. 160,809.

This invention relates to web-typing machines, an example of which is seen in thepatent of Wernery andSmith, 1,132,055.

In said machines it is usual to insert 5 carbons between the plies of web, and, after the typing of "each web-form is completed, to shift or strip the carbons along the web preparatory to typing a fresh form. The web is usually fan-folded although in many cases it is made up of loose plies. The present invention is adaptable for either kind of web.

In some kinds of work it is desirable to omit, from some of the copies, matter which is typed upon the remaining plies. It is one of the objects of this invention to provide simple and efficient and easily operable means to accomplish this pur ose.

To this end there is substituted in place of the usual cylindrical platen, a plurality or set of platens which may be brought into and out of use alternately, although the entire set may be lifted or displaced upwardly from printing position to permit of the straightening out of all the plies preparatory to stripping the carbons. Each of the. platens is therefore capable of movement into and out of printing position to permit corresponding movement of the other platen, while both platens are shiftable as a unit to the carbon-stripping position.

For this purpose the platens are mounted upon a swinging frame which is hinged upon the typewriter-carriage to swing up and down at the carbon-stripping-operation. When the platen-frame is locked down in typing position then either platen may be ad usted into or out of typing position. Certain of the plies are carried on one of said platens, while all the plies are carried on-the other platen. Hence when it is desired to type on all of the plies inthe typewriter the typing is ,done upon the full printing platen; while when it is desired to type only upon the top ply or several of the top plies, said plies are carried upon only the partial typing platen. Certain of the plies therefore have to pass through the space between the platens, but '0 this is. accomplished, without interference with the platen-displacing operation required for stripping the carbons.

There may be employed two separate fan folded webs, one to be typed upon one of the platens, and both to be typed upon the other platen; but preferably the entire set of plies is printed as a unit, that is as a single fanfolded web; and a splitting knife is employed upon the end of one of the carboncarrying plies for thepurpose of dividing the web into two webs, one of the webs to pass behind the partial typingplaten so as not to receive the type-impressions-at the time that the other plies are being typed upon said partial typing platen.

Certain features herein disclosed are found in my co-pending application Serial No. 20,061, filed April 2, 1925 (now Patent No. 1,616,555, dated February 8, 1927); but the claims herein are limited to features not found in said patent.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a pers ective View of the usual Underwood fan-fol carriage, with some of the parts broken away and other parts removed for the sake of clearness.

Figure 2 is a perspective view of the righthand section of a dismantled platen showing in detail the structural features of mounting one platen-section upon the platen-shaft, and mountmg another platen section upon the first section, and the connections associated therewith for feeding the fan-fold web.

- Figure 3 is anelevation of the left-hand end of the carriage, some of the parts being broken away.

Figure 4 is a cross-sectional view through the platen-carrier, showing the platens disposed in normal positions where all the plies of the fan-fold-web will be typed simultaneously.

, Figure 5 is a cross-sectional view similar to Figure a, showing the platens in their shifted position where only the front series of .Webs will receive type-impressions.

Figure 6 shows the platen-sections in their fold-web prior to the stripping of the carbons and the gaging of the ty ed web-section.

Figure 7 is a front e evationof the lefthand end of the carriage and platen-carrier, some of the parts being shown in section to better illustrate their manner of assembly,

In the. Underwood fan-fold machine the carriage 10 is slidable upon a rail 11 at the I arms 23 fulcrumed upon the carriage-ends 21,

and a center roll 24 at the front of the frame riding upon a shift-rail 25 provided wlth the usual case-shift key-connections whereby the platen-frame may he case-shifted within the travelling carriage. The. carriage also includes a rearward extension 26 secured by brackets 27 to the carriage-frame composed of a framework toprovide suitable tracks 28 to guide and support a travelling carbonsheet carrier or carriage 29 having the usual Underwood carbon blades 30 whereby carbon sheets are introduced between the plies of the travelling fan-fold-web of work-sheets 31. A platen-shaft 32 journaled at each end within the side walls 33 of the platen-carrier or frame 34 swingable with a rock-shaft 35 havin end-bearings in carriage-ends 21. A

air 0 feed-rolls 36 are controlled by a lever 37, fulcrumed upon a tie-rod 38 on the carriage-frame and formed with a hook 39 operative to engage a stud 40 in the side face of an extension on one of the side walls 33 to seat said extension against the tie-rod 38, and thus lock the platen-carrier in itsoperative typing position. The carriage-ends 21 are provided with bearings for a pair of short shafts 41, having fin er-wheels 42 at the outer free ends thereof an gears 44 and secured to the inner ends of these shafts, respectively; The

axis of these two shafts 41 is identical and not changeable, and the driving connection between both shafts and the changeable axis of the intermediate main shaft 32 includes gears 43, 43 secured to the main shaft 32 to align with the two gears 44 and 45 forming therewith a pair of gears at each end of the main shaft that mesh with pinions 46 loose upon I the rock-shaft 35 at each end of the carriage, and provides for a permanent geared coupling between the shafts 41 and the main shaft 32. A line-space ratchet-wheel 47 is fixed to the left-hand shaft 41, provided with the usual'detent-roll 48, and actuatedstepby step by a pawl 49 carried by a slide 50 vihaving platen ends 58 with hearings to swing upon the platen-shaft 32 and having an outer peripheral face 59 radial with the shaft 32 to forma support for backing'up the webs. One end 58 of the platen 57 may have an arm 60 secured thereto, by means of screws 61, and offset. at 62 to pass through an opening 63 in the side wall 33 of the platen-carrier 34, with the free end thereofcurved forwardly and terminatin slot 63 may limit the throw 0 the arm 60 in both forward and rearward directions, and

locking means are provided in the form of a round nose-stud 65 projecting from the side 7 wall 33, and over which the arm 60 is sprung,

so that said stud may bear against either edge of the arm and lock the and between said stud and either end' of the slot 63. This swinging movement ofcthe arm 60 swings the platen 57 about the shaft 32 from the inoperative position of Figure 5 to the operative position of Figure 4, where said laten backsup the types 66. v v

If a web should now be fed into the machine over an apron 52 secured to the carriage, thence around over the feed-rolls 36 to the front of the platen 57 to the severing knife '53, and then over a front paper-table 54 secured to the swingable platen-carrier 34, it would be possible to type on said web. After such a typing operation, the platen may be in a fingeriece-64'. The

the webs at the printing position of ice raised by first releasing the stud 40 from the hook 39 and then swinging the platen upwardly with the rock-shaft 35v for a fulcrum, in order to straighten out the webs that may now be drawn forwardly to be severed by the knife 53 in lengths predetermined by gage 55, the carbon sheets having been pre' viously stripped from the typed sections of the web by pushing the arm 55 secured to the carbon-carrier 29 rearwardly, which withdraws the carbon-inlays to a position where their leading-in edges are just above the ty ing P05151011. v a

owever, with the platen 57 positioned as at Figure 4, it is obvious that all the Webs passing over the face thereof will receive t e-impressions, and that if said platen is s fted to the Figure 5 position the types 66' the Figure 5 position a partial or bar platen 67 is introduced, having a narrow, limited width and a length equivalent to the length of the platen 57, and formed with parallel enveloping ends to provide arms similar to 68 that may be pivoted at 69 to the outer faces of both platen-ends 58. The platen 67 normally rests upon a stop-pin 70, and has a free swinging movement between said pin and the cutter-blade 53, for purposes presently to appear.

With the platen 67 positioned, as at Figure 5, to back up the typing line, any webs that may pass over said platen will be typed upon, but if certain of the webs are fed to the rear of said platen these latter webs will be linespaced with the outer webs, but will receive no type-impressions. Topromote the feeding of certain webs at the rear of the platen 67, the platen 57 is formed with a longitudinal rib or apron 71 so disposed as to form a longitudinal channel between said rib and the adjacent end of the platen 67.

If the work-sheets are separate webs, the webs may be divided into a series of two or more; one series may be guided to the rear of the platen 67 by first raising the platen against the knife 53, directing the webs under said platen and over the platen 57, and then allowing said platen 67 to drop to its normal. position against its stop-pin and on the outside of the inner series of webs, and the outer series of webs may be Wrapped over said platen 67 and joined to the other webs to pass over the platen 57 and under the knife 53.

If the fan-fold-web includes four webs joined together at their longitudinal edges, the carbon-carrier may be provided with the usual slitting knife 72 operative to divide the fan-fold-web into two longitudinal sections, each section including two webs joined together at one edge. These two webs be fed as a single web to a point below the typing line where they are separated, one web passing to the rear of the platen 67, and the other web over the front of said platen.

To provide for a Web-feeding operation whereby all the webs will be line-spaced in unison, means are employed similar to those shown in my said patent, where each of the gears d3 has an. internal gear-formation 73 to drive a pair of pinions 7 4, each pinion being secured to a shaft 75 having bearings within the side walls 33 of the platen-carrier 34. Each shaft 75 may have one or more feed-rolls 76 secured thereto to be rotated. by their respective pinions 74, and said rolls are positioned to align with the usual feed-- rolls 36 that formerly were operative to bear against the face of a cylindrical platen.

In adjusting the fan-fold-web as a unit to the typing line, the platen-carrier is released from the hook 39 by pushing the lever 37 rearwardly and then by the use of a fingerpiece 77 secured to the rock-shaft 35, the platen-carrier, as a unit, is raised from the position of Figure 3 to the position of Figure 6. The fan-folded web, as a unit, is drawn forwardly to pass under both platens 57 and 67 with the leading edges in alignment with the cutting edge of the knife 53 when the platen-carrier may be restored to normal working position with the feed-rolls 7 6 co-operating with the rolls 36 to feed the webs, and the hook 39 ire-engaging the stud 40 to hold the carrier locked down in its normal position. The webs which cover both platens 57 and 67 are bent forwardly over the front feed-rolls 36. If the webs have been slit by the cutter into two longitudinal sections, or if separate webs have been divided into two series, the ends of the inner section of webs or the inner series of webs is adjusted under the partial platen 67 and the outer section of webs or the outer series of separate webs may be wrapped or passed over the bar platen, and both sections readjusted over the platen-surface 59 and under the cutter 53, the cutter being so disposed relatively to the face of the platen to hold the work-web plies in proper typing position against the platen.

if the character of the work requires that initial lines to be typed shall be manifolded upon all the webs, the arm 60 is swung tothe position of Figure 4, which rotates both platens 57 and 67 to the positions shown, and where the platen 57 becomes operative to back up all the webs at the printing line to promote manifold. typing thereon. If a second line to be typed is to be manifolded upon all the webs the swinging of the line-space lever operates to drive the shaft 41 to rotate the train of gearing to the pair of feed-rolls 76, and both webs are fed a line-space distance by said rolls, the inner web being forced upwardly through the channel formed between the two platens 57 and 67, and the outer web forced across the face of the partial platen 67 and along the platen-face 59. In this manner, instead of rotating a revoluble platen line-space distances to feed the webs, the. webs are fed over stationary platen-surfaces.

When the character of the typing changes and requires that certain entries made upon the outer web should not be manifolded upon the inner webs, the arm 60 is shifted rearwardly from the position of Figure 4 to the position of Figure 5, where the platen 57 has swung away from, and the platen 67 has swung into the typing zone of the types. Any typing executed from this point will manifold only upon the front webs backed up by the platen 67, and the inner webs will be cut off from the typing position by passing to the rear of the partial or bar platen. if, after a typing interval, the character of the printed forms on. the work-webs requires that subsequent line-entries be manifolded upon all the web-forms, the restoration of the platen 57 to Elli lit?

the printing zone of the types again provides a backing for all the webs and the typed items will be manifolded upon all the webs.

A pair of platens of this character mounted upon the platenshaft to be easily and quickly swung into the typing-line position without disturbing the work-webs provides a means whereby alternate line-entries may be cut off from the inner webs or certain entries in the same line, like costs and discounts, appearing upon the outside webs, may be cut out of the line manifolded upon the inner webs.

At the end of the typing operation for a printed form the webs have been advanced upon the table 54, and the carbon-carrier29 has been drawn forwardly towards the platen by the webs in being linespaced. The platencarrier is raised to the position of Figure 6'to straighten out the webs, the arm 56 is pushed rearwardly to strip the carbon-sheets from the typed form and the webs drawn forwardly to the gage 55. The platen is restored and the type-form of one or both web-sections may be severed by the knife 53.

It will be noted that the platen-carrier is an assembled unit interchangeable with the usual cylindrical platen employed on the Underwood fan-fold machines; that the primary platen is swingable upon the usual olaten-shaft to cover or uncover the typing line; that the partial or bar platen is carried by and swingable with the primary or segmental platen to cover and uncover the typing line; that the bar platen is swingable away from the primary platen to facilitate adj ustment of the webs; that while a single slitting knife is shown to divide the fan-folded web into two web-sections, duplicate knives may be carried by the carbon-carriage to slit the web into three or more web-sections; that the work-webs are fed to the typing position by feed-rolls mounted upon the platen-carrier and normally disposed below the typing line and actuated by the line-spacing mechanism; and that both platens are swingable about the same axis, one platen being eccentrically mounted upon the other platen to swing independently thereof.

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: v I

1. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen rockable about a main axis upon said frame, work-sheets being guidable toward the typing position on the carriage, an auxiliary platen arranged between said worksheets and associated with said main platen in such manner as to be rockable together with said plat-en about the same axis in order to alternate with the main platen at the typing position and thereby either back up all said sheets by means of said main platen or back up one or more of said sheets overllyin auxiliary platen by means of t e atter, whereby to permit selective typing on said work-sheets, said auxiliarly platen being also independently movable to a different spaced position relative to said main platen so as to normally float between said work-sheets and facilitate introduction and feeding of said sheets, and means for feeding said Worksheets to said platens.

2. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typin instrumentalities, of a main platen swingable about a main axis upon said frame, work-sheets bein guidable toward the typing position on t e carriage, an auxiliary platen eccentrically pivoted upon said main platen in such manner as to be arranged between said work-sheets and movable together with the main platen about the same axis in order to alternate with said platen at the typing position and thereby either back up said sheets by means of said main platen or back up the one or more of said sheets overlying said auxiliary platen by means of the latter, whereby to permit selective typing on said work-sheets, said auxiliary platen being also independently swingable upon its eccentric pivotal mounting on said main platen so as to readily float between said work-sheets and facilitate introduction and feeding of said sheets, and means for feeding said work sheets to said platens.

reference to each other to receive one or more of said work-sheets between them in a position to overlie one platen and all the sheets over said the other platen, and means for moving the platens alternately to the typing position on said carriage in order to back up one or more of said sheetsby means of one platen or to back up both sheets by means of. the other platen, to permit selective typing on said sheets.

4. In a typewriting machine having a carr age and a platen-frame thereon, the combination with typinginstrumentalities, of a main laten roc ably mounted on said frame, there eing work-sheets guidable toward the typing position on said carriage, an auxiliary platen arranged between said sheets and associated with said main platen in such manner a s to alternate therewith at the typing posltlon so that either the main platen will back up all said sheets or the auxiliary platen will back up the one or more sheets overlying the latter platen in order to permit selective typing on said sheets by means of the platens, means for feeding said work-sheets simultaneously to said platens including corresponding feed-roll units arranged to engage and feed the work-sheets therebetween, and a work-sheet guide including an apron fixed upon said main platen adjacent saidauxiliary platen, said apron and said feed-roll units constituting co-operative means for guiding one or more of said work-sheets behind said auxiliary platen and between both platens so as to permit the auxiliary platen to overlie and shield said one or more worksheets from manifolding action at will.

5. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbon-sheets between said webs, the combination with a platen-frame which is displaceable upon said carriage to generally straighten said webs for carbon-stripping operations, of a pair of distinct platens pivoted together and separable with reference to each other to receive one or more of said webs between them in a position to overlie one platen and all the webs over the other platen, means to move the platens alternately to the typing position on said carriage in order to either back up one or more of the webs by means of one platen or to back up all said webs by means of the other platen, to permit selective typing on said webs, and means to feed said webs to said platens.

6. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbon-sheets between said webs, the combination with a displaceable platenframe upon said carriage, of a pair of distinct platens arranged upon said platenframe to be set alternately to the typing position upon the carriage, there being means for feedingsaid webs toward the platens so that one platen will be rockable behind all said webs to back up the sanie at the typing position and the other platen rockable between said webs to back up the one or more webs overlying said other platen in order to permit selective typing upon said webs, said platen-frame being displaceable to raise said platens and generally relieve said webs for carbon-stripping operations, and said other platen in addition being also independently displaceable in displaced position of said frame so as to float between the work-Webs and thereby further relieve and straighten the paths of said webs in order to further facilitate said stripping operations.

7; In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbon-sheets between said webs, the combination with a laten-frame which is displaceable upon said carriage to generally straighten said webs for carbon-stripping operations, of a pair of distinct platens pivoted together and separable with reference to each other to receive one or more of said webs between them in a position to overlie one platen and all the webs over the other platen, means to move the platens to the typing position on said carriage in order to either back up one or more of the webs by means of one platen or to back up all said webs by means of the other platen, whereby to permit selective typing on said webs, means for feeding said work-webs to the platen including driving feed-rolls supported on said platen-frame, and means for manually operating said feed-rolls, the platens and feed-rolls being displaceable together as a unit upon displacement of said platen-frame in order to further straighten and disengage said work-webs for said carbon-stripping operations.

8. In a fan-fold typewriting machine, the combination with a carriage provided with means to guide and direct a fan-folded web of work-sheets and means operative to interleave carbon-sheets between the folds of the web, of a displaceable platen-carrier mounted upon the carriage and operative in normal position to establish a; typin position for the web and operative in disp aced position to generally straighten the web so that the carbon-sheets may be stri ped therefrom, a air of relatively separab 'e platens pivote to each other, rockably mounted upon theplaten-carrier, displaceable therewith and rocked to selectively present either platen to the typing position when the platen-carrier is in norma position, and means to displace said carrier to straighten the web and control the separation of one platen from the other to facilitate the carbon-stripping movement.

9. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen swingable about a main axis upon said frame, work-sheets being guidable toward the typing position, an auxiliary platen arran ed between said work-sheets and associate with said main laten so as to be both independently movab e to facilitate insertion of work-sheets between the latens v and also normally movable together wlth the main platen about the same axis in order to alternate with said platen at the typin position, and thereb either back up a the sheets by means 0 the main platen or back up the one or more sheets overlyin the auxiliary platen by means of vthe whereby to permit selective typing on sai work-sheets, means upon said main platen to locate said auxiliary platen in an adjacent spaced position'relative to the main platen so that said one or more work-sheets may be freely fed between said platens, and means for feeding said work-sheets to said platens.

atter 10. In a typewriting machinehaving a carriage, the combination with a platen-frame thereon, of a semi-rotary main platen swingably mounted on said frame, there bein means for feeding work-sheets toward sai platen, a second platen swingably mounted on said main platen in such manner as to be independently movable to facilitate insertion of one or more of said work-sheets between the platens and normally swingable with the main platen to alternate therewith at the typing position, and thereby either back up all of said sheets by means of the main platen or back up one or more of the sheets overlying the second platen by means of the latter, whereby to permit selective typing of said sheets, and means to determine a relatively normal position of said second platen with respect to said main platen, including a stop for said second platen associated with and movable with said main platen.

11. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen swingably mounted on said frame, work-sheets being guidable toward the typing position on said carriage, an auxiliary platen arranged between said worksheets and pivotally mounted on said main platen in such manner as to be both indepen'dently swingable upon the same to facilitate insertion of work-sheets between the platens, and also normally swingable with the main platen in order to alternate with said platen at the typing position, and thereby either back up all said work-sheets by means of said main platen or back u the one or more sheets overlying said auxiliary platen by means of the latter, whereby to permit selective typing on said work-sheets, means for feeding said work-sheets to said platens, and a stop projecting rigidly from the main platen in the path of the auxiliary platen so as to be engageable thereby in order to limit and maintain said auxiliary platen in a predetermined relatively spaced normal posltion with respect to the main platen to facilitate said alternation of the platens and feeding of the work-sheets between and over both platens.

12. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen swingably mounted on said frame, work-sheets being guidable toward the typing position on saidparria e, an auxiliary platen arranged between said work-sheets and pivotally mounted on said main platen in such manner as to both tend to swin independently ofthe main platen by the orce of gravity to permit insertion of work-sheets between the platens, and also to normally swing with the main platen in order to alter nate therewith at the typing position, and thereby either back up all said work-sheets feeding of said work-sheets between and over both platens.

13. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbons between the plies thereof, the combination witha platen-frame on said carriage which is displaceable to generally straighten said webs for carbon-stripping operations, of a rockable main platen mounted on said frame, a second platen arranged between said work-webs and eccentrically pivoted to gravitate 'in one direction away from normal relation thereto and also be norj mally rockable with said platen and thereby present either platen to the typing position in order to back up the one or more webs overlying said second platen by means of the latter, or back up all the webs by means of the main platen, whereby to permit selective typing on said work-webs, and means to feed sald work-webs to said platens, the platens being displaceable with said frame, and said second laten tending to gravitate in another direction upon displacement of the frame to further relieve and straighten said webs to facilitate said carbon-stripping operations,

14. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen in the form of an arcuate shell swingahly mounted upon said frame, worksheets being guidable toward the typing position thereon, a relatively smaller bar-platen arranged between said work-sheets and associated with said shell-platen in such manner as to normally move together with the same, in order to alternate with said shellplaten at the typing position and thereby either back up all said work-sheets by means of the shell-platen, or back up one or more sheets overlying the bar-platen b means of -the latter, whereby to permit se ctive typnation with typing instrumentalities, of a main platen in the form of an arcuate shell swingable upon a main axis on said frame,

work-sheets being guidable toward the typing position thereon, a relatively smaller bar-- platen in the form of a bail arranged between said sheets and eccentrically pivotedito the sides of said shell-platen in such manner as to normally swing together with the same about the same axis in order to alternate with said. platen at the typing position, and thereby either back up all the sheets by means of the shellplaten or back up the one or more sheets overlying the bar-platen by means of the lat ter, whereby to permit selective typing upon said Work-sheets, said bar-platen being also independently swingable upon its eccentric mounting so as to both lie relatively close to said shell-platen in normal position and be spaced therefrom when swung upon its axis and then substantially float between said work-sheets to facilitate feeding and insertion thereof, and means to feed said worksheets to said platens.

16. In a typewriting machine having a carriage and a platen-frame thereon, the combination with a shaft on said frame and typing instrumentalities, of a semi-rotary platen mounted on said shaft to he swingabie thereon, work-sheets being feedable toward the typing position on said carriage, a bar-platen arranged between said sheets and pivotally mounted in such manner adjacent one edge of the semi-rotary platen as to be both independently swingable in one direction to facilitate insertion of worksheets between the platens and normally swingable with the semi-rotary platen upon said shaft to alternate with said platen at the typing" position and thereby either back up all the sheets by means of said semi-rotary platen or baclr up the one or more sheets overlying: the barplaten by means of the latter, whereby to per mit selective typing on said work-sheets, and a sheet-guiding apron upon the edge of the semi-rotary platen disposed adjacent the barlaten for guiding" one or more sheets be-- neath the latter platen to both facilitate movements of said platens and feeding of said work-sheets.

1?. in a typewriting machine having a carriage and a platen-frame thereon, the combination with a shaft on said frame. and typing instrumentalities, of a semi-rotary platen mounted on said shaft to be swingable thereon, work-sheets being feedable toward the typing position on said carriage, a bar-platen arranged between said sheets and pivotally mounted on said semi-rotary platen in such manner as to be independently swing'able between said sheets to facilitate manipulation. thereof, and also normally swingable about said shaft with the semi-rotary platen, whereby to either back up all said sheets by means of the semi-rotary platen or back up the one or more sheets overlying the bar-platen by means of the latter and thereby permit selective typing on said work-sheets, and a worksheet guiding apron upon the edge of the semi-rotary platen disposed adjacent the barplaten and projecting beneath the latter to guide one or more sheets beneath said barplaten in order to facilitate movements of said platens and feeding); of said work-sheets.

18. In a typewriting machine having a carriage the combination with a platenframe thereon having a shaft, of a convex platen mounted on said shaft to be swingable thereon, work-sheets being feedable'toward the typing position, a secondary platen associated with said convex platen and spaced from one edge of the same so as to normally provide upon its outer face and between said sheets a spaced continuation of the face of said convex platen and arranged to alternate with the latter at the typing" position, whereby to permit selective typing on said worksheets and a web-guiding apron upon the edge of said convex platen extending beneath said secondary platein the adjacent edge of said secondary platen being formed beneath to correspond with the face of said apron to provide together with said apron a uniform passage between said platens for the one or more work-sheets overlying; the secondary platen 19. in a tan-told typewriting machine having a carriage provided with means for guiding continuous worlnwehs and means for in-' terleavingg carbon-sheets between said webs, the combination with a platen-frame which is swingably mounted upon. said carriage so as to be dis laceable about one axis thereon to general straighten s it"! work-webs for carbon-stripping operations, a pair of platens pivoted together and separable with reference to each either on said platen-traineto receive one or more or said webs between them in a position "to overlie one platen and all the wehs over the other platen and to swing together about a second axis on said platen-frame to alternate at the typing position on the carriage to either back up all the webs by means of one platen or baclr up one or more of the web by means of the other platen, to permit elective typingon said webs, means to feed said webs to said platens, and means to displace said platens w .a said frame to relieve webs and facilitate said carbon-stripping operations.

20. a tenfold typewriting machine having a carriage provided with means for guiding continuous work-webs and means i'or 'nterleaving' carbon-sheets between said webs, he combination with a platen-frame which is 'wingably mounted upon said carriage so as n he displaeeable about one axis thereon in order to generally straighten said worlnwebs tor carbon-stripping operations, eta pair of latens so relatively arranged on said platen- Ill) frame as to receive one or more of said webs between them in a position to overlie one platen and all the webs over the other platen, and to swin together about a second axis on said platenrame to alternate at the typing position on the carriage and thereby either back up all the webs by means of one platen or back up one or more of the webs by means of the other platen, whereby to permit selective typing on said webs, and means to feed said webs to said platens, the platens being displaceable with said frame and one of said platens further displaceable relative to the other platen about a third independent axis to further relieve said webs and facilitate said carbon-stripping operations.

21. In a typewriting machine having a carriage, the combination with typing instrumentalities and a platen-frame, of an arcuate platen swingably mounted on said frame and having the curved face thereof concentric with the platen-axis, work-sheets being feedable toward said platen, and asecond platen arranged 1 between said sheets and swingable about the same axis with said curved platen to present either platen to the typing position and limited in one direction of movement to exteriorly form a spaced continuation of the arc of said first platen and. also independently movable in another direction to project eccentrically beyond the arc of said curved platen to permit insertion of work-sheets between the platens, said work-sheets bein selectively controlled by said platens in order to produce selective typing upon said sheets. a

22. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbons between the plies thereof, the combination with a platen-frame on said carriage which is displaceable to generally straighten said webs for carbon-stripping operations, of a main platen mounted on said frame, there being feed-rolls on said carriage, a plurality of corresponding driving feedrolls normally engaging said carriage feedroll's, a gear-train and a finger-wheel for operating said driving feed-rolls, and thereby the carriage feed-rolls, in order to feed said webs toward said platen,and a second platen normally disposed between said main platen and said feed-rolls, and also between said webs, and pivoted so as to be normally swingable outward from between said main platen and said feed-rolls upon displacement of said platen-frame so as to further relieve said webs and facilitate said carbon-stripping operations.

23. In a. fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbons between the pliesthereof, the combination with a platen-frame on said carriage which is displaceable to generally straighten said webs for carbon-stripping operations, of a main platen swingably mounted on said frame,'there being feed-rolls on said machine for feeding work-webs to said platen, a second platen arranged between said webs and mounted adjacent said main platen in such a manner as to be normally swingable therewith in order to alternate with said platen at the typing position, and thereby either back up one or more of'said webs by means of said second platen or back up all the webs by means of the main platen, whereby to permit selective typing on said webs, and means including a pro ecting member for normally retaining said second platen uniformly in a position between said main platen and said feed-rolls, said second platen being automatically swingable out from between said main platen and feed-rolls upon displacement of said platen-frame so as to further disengage said webs and facilitate I said carbon-stripping operations.

24. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbons between the lies thereof, the combination with a platenrame on said carriage which is displaceable to generally straighten said webs for carbon-stripping operations, of a main platen displaceable with said frame, a second platen arranged between said webs and mounted adjacent said main platen in such a manner as to be normally swingable therewith in order to alternate with said platen at the typing position, and thereby either back upone or more of said webs by means of said second platen or back up all said webs by means of the main platen, whereby to permit selective typing on said webs, said second platen-being also independently swingable, and means to generally stop said second platen in independent floating position relative to the main laten to said webs upon displacement of sai frame, including a transverse member arranged on said frame and inverted therewith for directly supporting said webs in such a manner as to permit work-sheets being feedable toward said platen, and a second platen mounted to normally form a spaced continuation of said invertible platen between said sheets and to swing with said platen and present either platen to the typing position, whereby to permit selective typing upon said work-sheets by means of said. platens and u on inversion of said invertible platen, sai second platen being arill) All

till

till

memos ranged to swing independently across the normal space betweensaid platens and tending to hang outside the working lace of the invertible platen in order to provide clearance space between said working face and said second platen and facilitate insertion and manipulation of said work-sheets over and between said platens, there being means to feed the work-sheets to said platens when in normal position. I

26. Eln a tan-fold typewriting machine hava carriage provided with means for guiding a continuous tan-folded Work-web and means for interleaving the plies thereof with carbons, the combination with a platen-frame which is displaceable upon said carriage to generally straighten said work-Web for can hon-stripping operations, of a pair of distinct platens supported. on the platen-frame, pivoted together and separable with reference to each other, means including a slitting knife for dividing said fan-folded web into two continuous sections before reaching the plat ens in order to permit one section to overlie one platen and pass behind the other platen,

and both sections to overlie said other platen, means to move the platens to the typing position, to back up one web-section by means of the one M aten or back up both sections by means or the other platen, to permit selective typing on said web-sections, means to displace the platens with said frame to further straighten and relieve said web-sections for said carbon-stripping operations, and means for feeding said web-sections to said platens.

in a typewriting machine having a carriage and a platen-frame thereon, the combination with a shaft on said frame, of a main platen rockably mounted on said shaft, worksheets being ieedable to said platen, an auxiliary platen arranged between said worksheets and so associated with said main platen as to be uniformly rockable therewith about shaft in order to alternate therewith the typing position, and thereby either back up all said Work-sheets by means of the main platen or back up the one or more sheets overlying the auxiliary platen by means oil the latter, whereby to permit selective typing on said work-sheets, and means rendering said auxiliary platen independently movable to various distant positions relative to said main platen and shaft in order to facilitate insertion and feeding of said worksheets.

28. in a typewriting machine having a carriage and a platendrame thereon, the combination with typin instrumentalities, of a main platen swingably mounted upon said frame, worksheets being guidable toward the typing position, an auxiliary platen arranged between said work-sheets and associated with said main platen so as to be normallymovable together with the same about the same axis in order to alternate with said said platens.

29. In a typewriting machine having a carriage and a platen-frame thereon, the combination with typing instrumentalities, of a main platen swingably mounted upon said frame, work-sheets being guidable toward the typing position, an auxiliary platen arranged between said work-sheets and asso-,

eiated with said main platen so as to be normally movable together with the same about the same axis in order to alternate with said platen at the typing position, and thereby either back up all the work-sheets by means of the main platen or back up the one or more sheets overlying the auxiliary platen by means of the latter, whereby to permit selective typing on said work-sheets, an eccentric pivot on said main platen for said auxiliary platen, permitting the latter to move independently to variously spaced positions in relation to said main platen and facilitate insertion and feeding or said work-sheets, means for limiting the independent movement of said auxiliary platen about its pivot, including a rigid stop spaced from said eccentric pivot on said main platen, and means for feeding said work-sheets to said platens.

30; lln a typewriting machine having a carriage and a platen-trams thereon, the combination with typing instruinentalities, of a main platen swingable about a stable axis upon said frame, Work-sheets being guidable toward the typing position, an auxiliary platen arranged between said worksheets and associated with said main platen in such manner as to be normally swingable together with the same about the same axis in order to alternate with said platen at the typing po sition, and thereby either back up all the work-sheets by means of the main platen or back up the one or more sheets overlying the auxiliary platen by means oi the latter, whereby to permit selective typing on said work-sheets, said auxiliary platen being also independently movable to variously spaced positions in relation to said main platen to facilitate insertion and feeding of said worksheets, a pair of spaced rigid stops upon said frame for limiting the swinging movement of saidv main platen, an independent stop for limiting movements ofsaid auxiliary platen lid in one direction relative to saidniain platen, and means for feeding said work-sheets to said platens.

31. In a fan-fold typewriting machine having a carriage provided with means for guiding continuous work-webs and means for interleaving carbon-sheets between said webs, the combination with a platen-frame which is displaceable upon said carriage to generally straighten said webs for carbon-stripping o erations, of a main platen arranged on sai platen-frame to receive said workwebs over the same, an auxiliary platen pivotally mounted on the main platen so that one or more of said webs overlie the auxiliary platen and others pass between both platens while all of the webs overlie the main platen, said platens being normally movable together to alternate at the typing position to either back up all the webs by means of the main platen or back up the one or more webs overlying the auxiliary platen by means of the latter, to permit selective typing on said Work-webs, a -web-guid ing apron on said main platen, and means to determine said normal spaced relation between said platens and permit webs to be passedtherebetween, said means including a stop on one platen for engaging and spacing the other at a distance therefrom, said platens being displaceable with said frame, and said auxiliary platen being also swingably separable upon its pivotal mounting from the main platen so as to normally float between the work-webs in a spaced relation to the apron on said main platen for further straightening the path of said work-webs and facilitating said carbon-stripping operations.

32. In a typewriting machine, the combination with a main platen rockably mounted in the machine, of an auxiliary platen mounted on the main platen, rockable therewith and movable away from the same, to form a path for inserting work-sheets in the machine, either side of the auxiliary platen, and movable to a position near the main platen, to rock therewith, to select certain groups of work-sheets upon which to type.

33. In a typewriting machine, the combination with a main platen rockably mounted in the machine, of an auxiliary platen, eccentrically pivoted on the main platen, rockable therewith and also independently movable away from the same, to form a path for inserting certain of the work-sheets in the machine under the auxiliary platen and movable to a position near the main platen, to rock therewith, to select certain groups of work-sheets upon which to type. v

34. In a typewrit-ing machine, the combination with a main platen rockably mounted on the machine, of an auxiliary platen-bail, eccentrically pivoted on and located to form a continuation of the peripheral curve of the main platen, rockable therewith and also independently movable away from the same, to form a path for inserting work-sheets in the machine, either side of the auxiliary platen, and movable to a position near the main platen, to rock therewith, to select certain groups of work-sheets upon which to to form a path for inserting work-sheets in the machine, either side of the auxiliary platen, the sheets on the under side of said platen being guided by said edge, and movable to a position near the main platen, to rock therewith, to select certain groups of work-sheets upon which to type.

36. In a typewriting machine, the combination with a pivoted main platen rockably mounted on said pivot and also movable upwardly in the machine, of an auxiliary platen, mounted on the main platen, rockable there with and also independently movable away from the same when the platen is moved upwardly, to form a path for inserting work sheets in the machine, either side of the auxiliary platen, and movable to a position near the main platen, to rock therewith, to select pertain groups of work-sheets upon which to 37. In a typewriting machine, the combination with a pivoted main platen rockably mounted on said pivot and also movable upwardly in the machine, of an auxiliary platen mounted on the main platen, rockable therewith and also independently movable away from the same automatically by gravity when the platen is moved upwardly, effective when thus moved away from the main platen to form substantially a straight path for inserting work-sheets in the machine, either side of the auxiliary platen, and movable to a position near the main platen, to rock therewith,

for selecting certain groups of work-sheets upon which to type.

38. In a typewriting machine, the combination with a main platen in form of an new ate shell, of an auxiliary platen-bail eccentrically pivoted on the main platen, rockable therewith and also independently movable away from the same to form a path for inserting work-sheets in the machine, either 'side of the auxiliary platen, and movable to a from the main p in the machine, either side of the auxiliary platen, and movable to a position near the main platen to rock therewith to bring the main and auxiliary platen alternately to the typing line for selecting certain groupsof nation with a pivoted main platen rockabliv mounted on said pivot and movable upwar ly upon an axis eccentric to said pivot, of an auxiliary platen, rockable therewith and movable away from the same when the platen is moved upwardly to form substantially a straight path for insertin work-sheets in the machine, either side of t e auxiliary platen, and movable to a position near the main platen, to rock therewith, for. selecting certain groups of work-sheets upon which to type.

42. In a typewriting machine, the combination with a main platen rockably mounted on an axis in the machine, of an auxiliary platen associated with the main platen and rockable on the same axis therewith, and means for moving the auxiliary platen away aten to rmit insertion of work-sheets in the machine and to replace the auxiliary platen in its initial osition, to rock with the main platen, to se ect certain work-sheets upon JWhlCh' to t ESSE ai fi. SMITH.

Images