US1489226A - Typewriting machine - Google Patents

Description

April 1 1924.

J. A. WHERRY TYPEWRITING MACHINE Filed Feb. 12 1921 2 Sheets-Sheet 1 April 1 1924.

J. A. WHERRY TYPEWRITING MACHINE Filed Feb. 12 1921 2 Sheets-Sheet 2 Patented Apr. 1 1924.

JOHN A. WHERRY, 0F ORLEANS, LOUISIANA, ASSIGNOR 'l'O UNDERWOOD I 1,489,226 PATENT oFric E.

TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A- CORPORATION OF DELAWARE.

TYrEwnrrme' manure.

Application filed February 12 um. .Serial No. 444,306.

To all whom it may concern:

Be it known thatjI, JOHN A. .WrmRRY, a citizen of the United States, residing in New Orleans, 'in'the parish of Orleans and State of Louisiana, have invented certain This invention relates principally to improved means for enabling the operator to insert sheets bottomv end foremost at the front of a revoluble platen of a front-strike typewriting machine. 7

In my pending applicatiom'No. 435,591, filed January 7,-1921, (now' Patent No. 1,465,242, dated August 14, 1923), is shown a flexible temporary guide, preferably cloth or other fabric, which normally lies out of use back of the platen, butwhich may be carried forwardly under the platen and up in front thereof with its front edgesomewhat above the printing oint on the platen. The work-sheet is inserti le bottom end first between the temporary guide and the platen, and may be thrust down aroundthe platen as far as desired, usually to a position to begin the first line of writing. This is done while the temporary guide remains in its advanced position,and while the usualefeedrolls are cast off from the bottom of the Thereupon the temporary. guide sheet is pulled rearwardly. and'restored to its normal idleposition back of the platen, and the feed-rolls are restored to operate upon the work-sheet, whereupon-the typing may proceed.

One ofthe objects of the presentinvention is to improve the construction and opera-v tion of the means for advancing the guide sheet. The modified guide-sheet controller herein disclosed comprises a parallel motion devicein'the nature of two diagonal crossbars pivoted together where they cross, and having pin-and-sl'ot connections'at their ex treme ends, so as to carry the temporary guide-sheetforward and'back in a straight path without skewing; and this parallel motion device is connected by a link to a keylever mounted upon the typewriter carriage.

relates to improved means for securing carbon copiesof typed sheets To this end, the- Another feature of the present invention with the 'end of the temporary guide-sheet at the front of the platen. The-outer worksheet, which is to receive the ink impressions, is introduced bottom foremost between the temporary guide-sheet and the carbon web,

and pushed downwardlyas far a required,

while the guide-sheet and carbon web remain stationary. Then another work-sheet is in troduced, bottom end foremost, between the carbon web and the platen,and pushed down as far as desired, while theremaining sheets 5 remain stationary. It is believed to be broadly new to organize a typewriting machine with permanent provision for racticmg the method of introducinga wor -sheet the end of the carbon web stands about even bottom endfirst downwardly between the leading end of a carbon web and the front. of the platen. The operation may be quickly performed, inasmuch as the end of the car! bon web may be readilyflexed forwardly to open a space for the introduction of the work-sheet; The use of the flexible temporary guide-sheet renders it practicable to use a carbon in this way, inasmuch as it affords means. whereby that work-sheet which must lie outside of the carbon may readily be inserted and thrust down and back around the carbon web.

It will be alsounderstood that more than one carbon'web maybe employed, and that work-sheets may be readily inserted, bottom end forem,os t,'between the carbon 'webs. v

A separate, spool may be provided for each carbon web, and provision may be made for winding the spools back simultaneously when required. The invention is not limited in all cases to carbon-spools or to.

carbon webs, inasmuch as it is believed to be new to organize a type-writing machine with permanent provision for the use of a plurality of carbon webs between a tem-. porary guide-sheet and the platen, which webs may remain connected toJzhe machine while typed worksheets are removed and fresh sheets-are introduced for receiving ink and carbon impressions.

, Preferably a proof-sheet or condensed record-sheet remainsin the machine while the work-sheets are typed and replaced ply fresh 'work-sheets, so that a record of l transactions is preserved upon suchproofsheet, this record being made-preferablyby -means of a carbon web. However, when such. proof-sheet is not to be typed, a short work-sheet may be introduced, bottom end foremost, between the inner carbon-andthe platen, 'as will be. understood. This is believed to be a satisfactory method for introducing work-sheets between carbons in a round-platen by writing machine and removingthe wor sheets and replacingthem by fresh ones while the carbon remains in the machine permanently, or until worn out. More than two carbon webs may be ein- Eioy'ed, together with a corresponding numr of spools on theplaten-frame or support. p After the various work-sheets have been introducedbetween the guide-sheet and the (carbon, and between the carbons, and also between the inner carbon and the platen, the temporary guide-sheet may be withdrawn to itsidle position, and then the feedrolls' may be brought into use'to hold'the sheets to the platen for line-feeding and typing. After the work-sheets are typed, they may be withdrawnfand then the carbon webs, which have been line-spaced together with the "work sheets, may be retracted to their first positions, preferably by rolling up the webs on the spools; this being done with an Underwoodt'ypewriting machine,

Figure 1 isa front'view of a bar carrying the temporary guidesheet, and. a parallelmotion linkage controlling themotion offthe Figure 2 is a front view,- the front collat-' ing table being partly broken away to dis close the underlying mechanism.

Figure 3 is a cross-section of the device shown in Figure 1, the section being taken about on the line 33 thereof.

Figure 4 is a vertical section, showing the guide-sheet in retracted position.

Figure 5 is a view similar to Figure 4, and shows the device after the initial movement of the operating mechanism to cast off the feed-rolls.

Figure 6 is a view similar to Figures 4 and 5, and shows the device after'completed' movement of the operating mechanism, the feed-rolls being cast off and the guide-sheet being in forward or operative position.

A revoluble platen 1 is fixed upon an axle 2, journaled in the end walls 3 of the usual platen or shift. frame. Theplaten may be line-spaced by the usual line-space mechanism comprising a slide 4, a line-space handle (not shown) for the slide, and a line space wheel 5 fixed to the platen axle 2. The platen may be rotated forwardly or, backwardly by means of the usual fingerwheels 6 fixed on the ends of the axle 2. The platen-frame comprises also a forwardly and downwardly inclined rear paper-table 10, and a curved paper-apron 11 beneath the platen, and shown as forming a forward continuation of the rear paper-table. Front and rear feed-rolls12 and 13 co-operate with the lower side of the platen through open ings in the paper-apron, the front feed-rolls being mounted upon a front feed-roll shaft 14, and the rear feed-rolls upon a rear-feedroll shaft 15. .T he front feed-roll shaft 14 is carried by forwardly-projecting lever arms 16, and the rear feed-roll shaft is similarly carried'by rearwardly-projecting lever-arms 17. The lever-arms 16 and 17 are pivoted upon a transverse shaft 18 forming alower tie-rod and are engaged by springs (not shown) which press the rolls 12 and 13 into gripping relation with the platen,

A cast ofi' device is provided for the feedrolls, and comprises a finger-piece 20, pivoted at 21 on one of the platen-frame end walls 3 (shown here as the right wall), and connected by a link 22 to a short downwardly and forwardly extending crank-arm 23 on the adjacent end of a cam-shaftor rockshaft 24, journaled in bearings 25, carried by the tie-rod l8, and provided with flattened cam portions 26 engaging between cam-lugs 27 and 28, which form downward extensions on the respective front and rear feed-roll arms 16 and 17. Downward pressure on the projecting end of the fingerpiece 20 will operate to rotate the rock shaft 24 through an angle of about 90 degrees for casting off the feed-rolls from their engaging or gripping position, shown in Figure 4, to their released or disengaged position, shown in Figure 5, in which latter position they will be detained by reason of the transverse locking position of the cams. In a typing operation, types carried by usual type-heads 30', one of which is shown at the printing position in Figure 4, strike 'upon the platen 1 at the printing line at the front thereof above the paper apron 11.

The parts so far described belong to the usual Underwood standard typewrit ing machine As set forth in the statement of invention, novel means are provided on the rear papertable, whereby a blind or guide-sheet may be run up in front of the platen at will, so that work-sheets may be inserted, bottom end foremost, between the guide-sheet and the front of the platen. A blind or guidesheet 35 (see Figure 1) is fixed by screws 36 to a transverse bar 37, to which is connected The links cross each other and are pivotally connected at46, the lower ends of said links being pivotally and slidably connected to the rear paper-table by screws 47 and 48 passing through said links and operating in slots 49 and' 50,, respectively. The rear paper-table 10 has fixed thereto, at the rear, 9 a bar 55'by-screws 56, said bar being attached to the platen-frame at its ends by screws 57.- From the above-described parallel motion linkage, it will be understood thata down-;

ward force applied at one side of bar 37 will move the entire bar downwardlywhile maintaining it in ahorizontal position. Screws 42 and 43 will move to' the lower ends of the curved slots 51 and 52 and to the outer ends of slots 44 and 45 (from'the Figure 1 to the Figure 2 position), while the screws 47 and 48 will move to the inner ends of the'slots 49 and 50. The sheet 9 attached to bar 37 can thus be pushed f or-' w'ardly around the platen without skewing or other. sidewise motion.

Means are provided on the platen frame for operating the transverse bar 37 and its 35 attached guide-sheet. The bar is provided i at one end with an ear or flange 60, to which is pivotall connected at 61 an upwardlyextending ink 62. A second link 63 is plvotally connected at one end to the end-of links '62 at 64, and at the other end is pivoted on.

a pivot-stud 65, mounted in a supporting bracket 66, fixed u on the top of the ad a- 'cent end wall 3 o the platen-frame.

roll-release-lever for to be described.

Pivoted upon the stud 65 is a lever having a forwardly-extending arm 71 provided with a; purpose hereinafter 50 *a finger-piece 67, and a rearWardly-extend- 5 ing linger-piece 67 pin 69 presses link 63 downwardly to push transverse bar 37 and sheet 35 around the platen, and that-,- by lowering finger-piece 67, pin 70 presses link 63'upwardly to raise bar 37 and draw the guide-sheet r'earwardly.

-To-.allow for easy movement of the guidesheet, it is desirable to throw oflf the feedrolls, before such'movement begins. The

mechanism for effecting this purpose com} prises a headed stud adapted to engage The bracket-and linkage are. mounted upon the same side of the platen-frame as; the feedposition.

'engages no part of the operatin which therefor-cremains in the lgure 6 i is beneath a shoulder or offset 81 formed near the upper end of substantially vertical operating link 82, the lower end of'which forms an upward extension of the link 22 operating the feed-roll rock-shaft 24, so

that, by moving link 82 upwardly, it isipos sible to release the feed-rolls. .The link 82 is guided by means of aheaded stud or pin 83 projecting from an ear 84 formed on the bracket 66 and, engaging in a straight guideslot 85 extending longitudinally of link- 82.

The guide-slot 85 is extendedupwardly toform an arcuate front wall 86 below the offset' 81 and to form an arcuate guide-slot 87 above the offset, the curve of the arcuate Wall and the guide-slot being concentric :with the axis of the pivot-stud 65 in theposition of parts shown in Figure 6.

In order to cast ofi the-feed-rolls preparatory to the forward movement of the guidesheet 35, the finger-piece'67' is lifted from its depressed position, shown'in Figure 4, to- .ward the raised position thereof, shown-in Figure 6. During the initial part of this movement and until the intermediate stage illustrated in Figure 5 is completed, the link 82' willbe raised by reason of the engagement of stud 80 with the shoulder 81, thereby casting off the feed-rolls, and during this initial upward movement of the finger-piece 67 the lost motion between pin 69 and link 63 will be taken up, no movement being impartedto link 63. At the intermediate stage shown in Figure 5, by reason of the angular forward movement of stud 80, and the substantially straight upward movement of the link 82 guidedby stud 83-, the operating stud 80 willslip' oil the shoulder 81 into the arcuate slot 87 at substantially the same time that pin 69. contacts with link 63 (see Figure 5). Further or continued upward movement of the operating handle or finger piece 67 will have no efiect upon-the feedrolls, since the link 82 remains in the position shown in Figure 5, the feed-rolls being east 01f. Upon continued upward movement wardly withoutv skewing or other uneven motion.

For withdrawing or retracting the guidesheet 35, the finger-piece is moved downwardly from the Figure 6 to the Figure 4,

The downward movement of finger-piece 67 will result in stud 8O riding down the entire length of arcuate slot 8 and along the arcuate wall 86. The stud link 82 position. In the initial downward movewardly to retract to the rearward position To lower the link the bar 87 and the sheet 35. 82 so that shoulder 81 againengages stud 83, the finger-piece 20 is rocked upwardly, thus drawing link 82 downwardly and restoring the feed-rolls to gripping position.

To enable several duplicate copies to be made, a plurality of carbon-sheets 90, 91 are fed over the rear paper-table from rollers 92, 93, mounted on the rear table. An idler roller 94, which may be of rubber, is adapted to,contact with the rollers 92, 93 outside the limits of the carbon-sheets, and is provided with a handle 95 for rewinding the carbon-sheets when a bill or form has been typed.

- In the operation of the device,*the guidesheet is thrust forwardly to the Figure 6 position, the feed-rolls being removed in the same operation, and thecarbon-sheets are drawn off their rollers until their front edges standa short distance above the printing point. I and 102,which may be respectively a recordsheet, a ledger-sheetand a bill-sheet, are

then inserted bottom end'formost between the carbon-sheets, the outer work-sheet being inserted between the guide-sheet and the first carbon-sheet, and the inner work-sheet being inserted between the last carbon-sheet and the platen, and are pushed around the platen tothe first line to be typed. The upper edges of the various work-sheets may be collated upon a table mounted on the platen-frame at the front thereof, said table being described in detail in my Patent, No. 1,324,682, granted December 9, 1919, but shown here in a general way with details omitted. Said table comprises a base 105 fixed to the front of bra'cket66 and having brackets 106 fixed thereto, each of said last-named brackets having a depending pressure-roll 107 adapted to press against the front of the platen. pack of work-sheets (sheet 100)is designed to pass beneath the brackets 106 and be held in place by the pressure-rolls 107. Mounted on each bracket 106 is a lower clamp 108 and an upper clamp 109. The second worksheet 101 is designed to pass beneath clamp 108 and be held at one edge, here shown as the right edge. The third or top sheet 102 (the outer sheet around the platen) passes beneath clamp 109 and is here shown held at the left edge. Theclamp 109 is provided witlrgraduations upon its upper face to facilitate the relative adjustment of the sheets. -When the sheets have been adjusted, the guide-sheet 35 is withdrawn by de- Various work-sheets 100, 101' The lowest of the pressing finger-piece 67, the feed-rolls are applied by raising finger-piece 20, and the typing may proceed. When a bill or form bottom end foremost, between the variouscarbon-sheets, between the last carbon-sheet and the platen, and between the guide-sheet and the first carbonsheet. If one of said sheets aproof-sheet or record-sheet itniay remain in the machine while several bill sheets and-'ledger-sheets are typed,'and may' be part of a continuous web which-*may be conveniently supplied from a roll conveniently located.

Variations may beresorted'to within the scope of the-invention, and portions of the.

improvements may be used without others.

Having thus described my invention,lI

claim:

1. In a front-strike typewriting machine, in combination, a cylindricalplaten, a paper-apron to co-operate with the lower part of the platen, a front-insertion device to guide the bottom edge of a work-sheet inserted at the delivery side of the platen between the platen and the paper-apron, a carbon-sheet roll so located at the rear' of the platen that the outer end of the carbonsheet may be drawn forward to lie along the inner face. of the work-sheet guided by said device and to guide the bottom edge of a second front-inserted work-sheet around the bottom of theplaten, and means tovturn said roll to rewind said carbon-sheet to itsfinitial position for typing, preparatory to inserting fresh work-sheets. y 2. In a front-strike typewriting machine, in combination, a platen, a rear paper-table associated therewith, a plurality of transfer-web rolls arranged to deliver the webs'thereon substantially along the upper surface of the paper-table, and having cylindrical friction members form- .ing extensions thereof, andrewinding means comprising a cylindrical friction member engaging the cylindrical friction members connected with said transfer-web r0lls, so-

that, upon actuation of the rewinding means in the proper direction, all of said lower edge of awork-sheet between the forward edge of the paper-table and the platen.

4. In a front-strike typewriting machine,

in combination, a platen, a rear paper-table of a work-sheet between the same and the associated therewith, a transfer-web roll p0 sitioned so that the uppersurface of the paper-table is substantially tangential thereto, and a front-insertion device normally positioned at the rear of the platen and movable to a position to receive the lower edge laten, to facilitate the insertion of the ower edgeof a work-sheet between the forward edge of the paper-table vand the platen.

5. In a front-strike typewriting machine, in combination, arevoluble platen, a papertable at the rear of the platen, a paperapron beneath the platen, a guide-sheet above the rear table and insertable from the rear between the platen and the paperapron, a transverse bar to which said guidesheet is attached at, its upper edge, and a manually-o erable linkage pivotally connected to sald bar for actuating said bar longitudinally of the paper-table, to move the guide-sheet forwardly to a position in which its forward edge projects at the front of the platen beyond the paper-apronfor guiding a work-sheet downwardly at the front of the platen between the platen and said guidesheet, said linkage being operable to retract said bar and guide-sheet.

6. In a front-strike typewriting machine,

in combination, a revoluble platen, a papertable at the rear of the platen, a paperapronbeneath the platen, a guide-sheet above the rear table and'insertable from the rear between the platen and thev paperapron, a transverse bar to whichsaid guidesheet is attached at its u per edge, a manually o erable linkage p votally connected to said bar for actuating said bar longitudinally of the paper-table, to move the guidesheet forwardlyito. a position in which its forward edge projects at the front 'ofthe platen beyond the paper-apron for guiding a work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, said linkage being operable to retract said bar and guide-sheet, and

a parallel motion linkage between said table and said transversebar to insure lon 'tudinal movement along said table of sand bar and guide-sheet without skewing.

7. In a front-strike typewriting machine, in combination, a revoluble platen, a papertable at the rear of the platen, a paperapron beneath the platen, a guide-sheet above the rear table and insertable from the rear between the platen and the papera ron, a transverse bar to which said guides eet 'is attached at-its upper edge, a manually operable. linkage pivotally connected to one end of said bar for actuatmg said bar longitudinally of the paper-table, to move Y the B5 osition in yond the idle-sheet forwardly to a whic its forward edge projects guidin bar to insure longitudinal movement along said table of said ba'r and'guide-sheet without skewing when the operative force is.

applied to one end of the bar, said parallel motion linkage comprising crossed and pivoted links, said links having pivotal lostmotion connections at their upper ends-to said transverse bar and similar connections 'at their lower ends to said table, said table having substantially longitudinal slots, and

means passing through the upper, ends of said links and co-operating with said slots to guide the movement of said links when said manually-operable linkage is actuated.

8. In a front-strike typewriting machine, in combination, a revoluble platen, a papertable at the rear of the platen, a paperapron beneath the platen, a guide-sheet above the rear table and'insertable from the rear between the platen and the paperapron, a transverse bar to which said guldesheet is attached at its upper edge, sald her having an upstanding flange at one end thereof, an upwardly extending link pivoted at one end to said flange and adapted to reciprocate longitudinally of'said table to actuate said guide-sheet rearwardly, and also forwardly to a position in which its forward edge projects at the front of the platen beyond the paper-apron for guiding a Work-sheet inserted downwardly at the front of the platen between the platen and said guide-sheet, and manually o erated means for operating said reciprocab e link.

9. In'a front-strike typewriting machine, in combination, a revoluble laten, a papertable at the rear of the p aten, a pa erapron beneath the platen, a guidesheet above the rear paper-table and. insertable from the rear between the platen and the paper-apron, a transverse bar to which said guide-sheet is attached at its upper edge, said b'ar having an upstanding flang'e at one end thereof, an upwardly extending link pivoted at one end to said flange and adapted to reciprocate longitudinally of said table to actuate said guide-sheet rearwardly, and also forwardly to a position inwhich its forward ed e projects at the front of the platen beyond the pa er-apron for a work-sheet inserte downwardly at the and the guide-sheet, and manually o erated means for operating said'reciprocab eilink, said means comprising an .intermediatelink pivotally, connected at one end to said reciprocable link and pivotally mounted on a fixed axis at the other end, and anoperating lever having connections with sald infront of the platen between the platen 1 termediate link to rotate the latter upwardly or downwardly to operate the reciprocable link.

10. In a front-strike typewriting machine,

in combination, a revoluble platen, a papertable at'the rear of the platen, a paper-apron beneath the platen, feed-rolls co-operating with the under side of the platen, means for releasing said feed-rolls, a guide-sheet above the rear paper-table and insertable from the rear between the platen and the paperapron, a transverse bar to which said guidesheet is attached at its upper edge, said bar having an upstanding flange at one end thereof, an upwardly extending link pivoted at one end to said flange and adapted to reciprocate longitudinally of said table to'actuate said guide-sheet rearwardly, and

also forwardly to a position in which its forward edge projects at the front of the platen beyond the paper-apron for guiding a worksheet inserted downwardly at the front of the platen between the platen and the guide-sheet, manually operated means for operating said reciprocable link, said means comprising an intermediate link piv- .otally connected at one end to said reciprocable link and pivotally mounted on a fixed axis at the other end, an operating lever release mechanism for castingofl' the feedrolls during the initial part of the movement of said operating lever, anda lost-motion connection between said operating lever and said intermediate link effective while the feed-rolls are being cast off.

11. In a front-strike typewriting machine, the combination of a revoluble platen, a

flexible temporary sheet-guide normally in a retracted position, means to advance said temporary sheet-guide up in front of the platen whereby a work-sheet may conven iently be introduced bottom end first between the temporary guide and the platen preparatory to retracting the temporary guide and typing on the work-sheet, and a mounted roll of carbon paper or transfer .material, the leading end of the transfer material being led forwardly beneath the platen and up in front thereof, between said temporary guide and the platen, to enable said work-sheet to be introduced between the temporary guide and the transfer material, and to enable a second work-sheet to be introduced bottom end first between the transfer material and the platen.

12. In a front-strike typewriting machine,

the combination with a revoluble platen and means at the end portions thereof to engage and guide the side portions of a recordsheet, of a mounted roll of carbon or transfer material which is led forwardly beneath; the platen and up in front' thereof, the web occupying a field between said paper-guid ing devices, so that the leading end of the web may be laid back or flexed away from the platen, to permit the insertion of a worksheet bottom end first between the platen and the 'web means being provided for guiding a-work-sheet bottom end first outside of the web and down around the platen.

13. A In a front-strike typewriting machine, the combination of a revoluble platen, a flexible temporary sheet-guide normally in a retracted position, means to advance said temporary sheet-guide up in front of the platen, whereby work-sheets may conveniently be introduced bottom end first between the temporary guide and the platen, and to retract the same when such introduction is completed, and means at the intake side of the platen to support rolls of transfer-webs from which the webs may be led forwardly beneath the platen and up in front thereof, between said temporary guide and the platen, and interleaved between work-sheets introduced between the temporary guide and the platen.

14. In a front-strike typewriting machine, the combination of a revoluble platen, a flexible temporary sheet-guide normally in a retracted position, means to advance said temporary sheet-guide up in front of the platen, whereby work-sheets may conveniently be introduced bottom end first between the temporary guide and the platen, and to retract the, temporary guide when such introduction is completed, means at the intake side of the platen to support rolls of transfer-webs from which the webs may be led forwardly beneath the platen and up in.

front therebf, between said temporary guide and the platen, and interleaved between work-sheets introduced between the temporary guide and the platen, and means for rewin ng said transfer-web rolls simultaneously. I H

'and means to support rolls'of transfer-webs adjacent the rear paper-table, so that the webs may be led therefrom between the paper-table and the platen and brought into interleaved relation with work-sheets introduced by said front-insertion means. 16. In a typewriting machine, the com bination with a cylindrical platen, of a frame orsupport therefor, and means permanently mounted upon said frame or sup-' port to carry. a roll or supply of transfer web or material in position to permit'the leading end of the web to be carried under the platen and up in front thereof, provision being made at the front of the platen for holding work-sheets upon the platen in a proper manner to receive the type impressions, said provision affording a movement of a leading end of the transfer web forwardly away from the platen to permit a work-sheet to be thrust bottom end first down back of the Web.

17. In a typewriting machine, the com bination with a cylindrical platen, of a frame or sup-port therefor, means permanently mounted upon said frame or support to carry a roll or supply of transfer web or material in position to permit the leading end of the web to be carried under the platen and up in front thereof, provision being made at the front of the platen for holding work-sheets upon the platen in a proper manner to receive the type impressions, said provision. affording a movement of -a' leading end of the transfer web forwardly away from the platen to permit a work-sheet to be thrust bottom end first down back of the web, and said provision also including an outer guide for a sheet thrust bottom end first down in front of the transfer web, whereby worksheets with an intervening transfer web may be collated in front of the platen, and releasable means to hold the sheets against the platen for the typing operation.

18. In a front-strike typewriting machine.

' the combination with a revoluble platen and a frame or support therefor, of a plurality of carbon-rolls upon said frame in position to permit the leading ends of the carbon webs to be led around beneath the platen and up in front thereof, and a sheet-guide at the front of the platen constructed to permit the required laying-back movement of ,the webs to facilitate the introduction of a work-sheet bottom end first between the guide and the carbon Webs and another work-sheet between the carbon webs.

19. In a front-strike typewriting machine, the combination with a revoluble platen and a frame or support therefor, of a plurality of carbon-rolls upon said frame in position to permit the leading ends of the car bon webs to be led around beneath the platen and up in front thereof, a sheet-guide at the front of the platen constructed to permit the required laying-back movement of the Webs to facilitate the introduction of a work-sheet bottom end first between the guide and the carbon webs and another work-sheet between the carbon webs, said guiding means being in the form of a flexible web mounted upon'said frame or sup: port for advancing to and retiring from working position, releasable means to press the work-sheets against the under side of the platen, and a spool or device for carrying a roll of work-paper to form a proofsheet, whereby work-sheets may be introduced and typed and withdrawn and rev placed by the fresh work-sheets while the carbon or transfer webs remain in .the machine permanently or until worn out.

20. In a front-strike typewriting machine, the combination with a revoluble platen and aframe or support therefor, of a transferweb roll upon said frame in position to permit the leading end of the transfer-web to be led around beneath the platen and up in front thereof, and a sheet-guide at the front of the platen constructed to facilitate the introduction of a work-sheet bottom end first between thevguide and the transfer-web and another sheet between the 1 transfer-web and the platen, said guiding means being in the form of a flexible web mounted upon said frame or support for advance to and retraction from working position. v

21. In a front-strike typewriting machine, the combination with a revoluble platen and a frame or support therefor, of a carbonroll upon said frame in position to permit the leading end of the carbon web to be led around beneath the laten and up in front thereof, a sheet guite at the front of the platen constructed to facilitate the introduction of a work-sheet bottom end first between the guide and the carbon and another sheet between the .web and the platen, said guiding means being in the form of a flexible web mounted upon said frame or support for advance to and retraction from working position, releasable means to press the'work-sheets against the underside of the platen, and a spool or device for carrying a roll of work-paper to form a proof-sheet.

' JOHN A. WHERRY. Witnesses:

FRANK A. ROBINSON, H. M. WEST.

Images