US2082069A - Typewriting machine - Google Patents

Description

June 1, 1937. E. z. LEWIS 2,082,069

TYPEWRITING MACHINE Filed March 2, 1932 5 Sheets-Sheet 2 IN VENTO/x A TTORNE K5 Jun 3,1937. E. z. LEWIS 2,082,069

TYPEWRITING MACHINE Filed March 2[ 1932' 5 Sheets-$heet 5 IN VENTOR du/wzd Jul/1L) A TTORNE Y6 June 1, 1937. E. z. LEWIS 2,082,059

TYPEWRITING MACHINE F iled March 2, 1952 5 Sheets-Sheet 4 ISnvenfor e dwww Ieww attorneys June 1, 1937. E. z. LEWIS TYPEWRITING MACHINE Filed March 2, 1932 5 Sheets-Sheet 5 ABSTRACT FREIGHPBILL the typing may proceed held against forward Patented June 1, 1937 UNITED, STATES PATENT OFFICE Smith & Corona Typewriters Inc., New York,

N. Y., a corporation of New York Application March 2,

23 Claims.

This invention relates to improvements in means for typing long strips of printed forms and is a further development of the mechanism shown and described in my application Serial Number 302,110, filed August 25, 1928, which matured as Patent No. 1,886,821, Nov. 8, 1932 for Method and means for typing long strips of printed forms.

In the present machine as in said earlier application a large number of copies of superimposed forms, printed to register with each other and joined at their edges, may be pulled forwardly across the top of the platen of a typewriter with carbon sheets interleaved with the longer printed forms, the carbon sheets, however, being movement so that when the end form or forward form of these long strips is folded back on the next succeeding form and drawn around the platen to the proper position, in the usual manner, the printed forms being drawn forwardly and cut off and the carbon sheets being used repeatedly 'with succeeding forms.

Important objects of the present invention are, to provide means for simultaneously typing a materially greater number of duplicate forms; to provide improved mountings for the carbon sheet anchoring bars, and to provide improved means for listing or abstracting the individual forms by the same typing operation. 1

Other objects of the invention will appear hereinafter.

In the drawings? Fig. 1 is a sectional side elevation of a typewriting machine with the improvements embodied therein;

Fig.2 a top plan view of the platen carriage and associated parts of the typewriting machine Fig. 3 a sectional perspective view of the platen carriage and associated parts and showing a fanfclded work sheet trained forward across the platen and interleaved with carbon sheets;

Fig. 4 an enlarged section on the line 4-4 of Fig.2 and showing superimposed work web plies trained across the platen and supported elevated therefrom;

Fig. 5 a view similar to Fig. 4 showing the pla en. rotated to another position with a length of the plies'bearing two successive forms wrapped about the platen;

Fig. 6 a sectional front view of the platen and the radially shiftable supporting and clamping means for the plies and carbon sheets;

Fig. 7 an enlarged longitudinal section on the line 1-1 of Fig. 6;

1932, Serial No. 596,198

Fig. 8 an enlarged transverse section on the line 8-8 of Fig. 6;

Fig. 9 an edge view of the anchoring means for the rear set of carbon sheets;

Fig. 10 a top plan view of said rear carbon sheet anchoring means;

Fig. 11 an enlarged section on the line llll of Fig. 3 showing said carbon sheet anchoring means latched at the rear edge of the paper table;

Fig. 12 a view similar to Fig. 11 showing said carbon sheet anchoring means released for forward travel along the paper table;

Fig. 13 a fore and aft sectional view of the platen and paper table showing two form lengths of the work plies wrapped about the platen and the rear carbon sheet anchoring means at the forward limit of its travel along the paper table;

Fig. 14 an enlarged detail section on the line "-44 of Fig. 13;

Fig. 15 a detail sectional view showing a modification of the radially shiftable supporting and clamping means for the superposed work plies and forward carbon sheets;

Fig. 16 a detail fragmentary perspective view showing a modified mounting of the clamping bar for the work plies;

Fig. 17 a front elevation of a modified platen having a longitudinal slot accommodating the anchoring bars for the forward carbon sheets;

Fig. 18 a top plan view of said modified platen;

Fig. 19 an enlarged transverse section on the 9 line |9-l9 of Fig. 18;

Fig. 20 a section on the line 2020 of Fig. 19;

Fig. 21 a perspective View similar to Fig. 3 and showing the abstract sheet overlying the fanfold web;

Fig. 22 a front view of the platen with the fanfold web and abstract sheet wrapped therearound;

Fig. 23 an edge view of one end of the radially shiftable supporting and clamping means for the work plies and carbon sheets and showing a carbon sheet anchoring bar mounted upon the under side of the clamping bar to anchor the carbon sheet for the abstract sheet;

Fig. 24 a fragmentary perspective view of a fanfold web with printed forms disposed for proper cooperation with the front and rear carbon sheets; and

Fig. 25 a view similar to Fig. 24 looking toward the opposite face of the fanfold web.

The typewriter T embodying the invention may be, in general, of any standard form except for the platen I and certain parts associated "tachment and removal of face of bar' therewith. Said platen is fixed on a shaft 2 rotatably mounted on the platen carriage 3 and provided with the usual hand wheels 4. Supported by the carriage in front of the platen is a transverse bar 5 affording a support for the work web plies hereinafter described. Directly back of the platen is a slightly inclined paper table 6 over which the work plies are trained forward to the platen. Said paper table is fixed, as at I, to the platen carriage to travel therewith. Adjacent its rear edge the table is slidably supported upon a fixed transverse'bar 8 supported by arms 9 secured to the body of the typewriter. The table may be otherwise supported, however.

In its periphery the platen has a longitudinal channel III with a flat bottom and flaring sides, and means are provided to clamp the work plies in said channel along a medial line extending across the plies and also anchor a plurality of carbon sheets interleaved with the work plies. Said means includes an approximately U-shaped frame II longitudinally straddling the platen and forming a straight fiat bar II overlying the bottom of the channel I0 and inwardly turned legs II extending diametrically across the opposite ends of the platen and slidably supported by guides I2 to shift radially of the platen and move the bar I I toward and from the channel bottom. Said guides are blocks I3 fixed to the ends of the platen. To assist in guiding the frame the bar II also has pins I4 projecting into radial guide bores in the platen. The legs II have slots I5 to receive the platen shaft.

Two pivot pins I 6 are carried by the bar Il near the opposite ends of the latter and several carbon sheet anchoring bars I! are pivoted upon each pin. Each anchoring bar has an eye near one end loosely receiving its pivot pin and also has a tail portion I8 engageable with a stop pin I9 also carried by the bar I I. Normally, prior to wrapping the work plies about the platen the bar II is disposed at the upper side of the platen and the anchoring bars directly overlie the bar II with the bars pivoted on one of the pins disposed adjacent and alongside the bars pivoted on the other pin. The stop pins I9 are disposed to the rear of the tail portions of the anchoring bars and engage said portions to lock the bars against forward swinging and thereby anchor the carbon sheets but permit the bars to be swung to the rear, clear of the platen, for the atthe carbon sheets. Each carbon sheet C has a loop along its rear edge which is slipped over one of the anchoring bars.

A work-retaining or clamping bar 20 normally overlies the shiftable frame bar II and the carbon sheet anchoring bars. At one end the bar 20 is pivoted as at 2I to the frame bar II to swing upward from the latter and uncover the anchoring bars. At its opposite end bar 20 makes a releasable snap-retaining engagement with a spring tongue bar and having a notch which receives a reduced knob shank 23 upon the bar 20. In cross section the bar 20 is segmental, its outer surface having a curvature corresponding with that of the platen periphery, and the bar is so mounted with relation'to the bar I I which carries it that when the latter bar is retracted to its innermost position 'within the platen channel the outer sur- 20' will form part of the platen periphery- {The two bars are' properly spaced to formed in end' 22 carried by the frame accommodate therebetween the carbon anchoring bars, the carbon sheets and the work plies.

ends of the platen tend to retract the U-shaped frame II for shifting the frame outward against the resistance of said springs. In the present instance said means includes end of said lever projects beyond the platen periphery and has a laterally projecting pin 28. A radial arm 29 is fixed to the opposite end of the rock shaft and its outer end is engageable with the adjacent frame ear 25. When said lever and radial arm are rocked in one direction the frame II will be shifted radially outward of the platen. For holding the frame shifted outward there is a latch 30 pivotally carried by the platen carriage in front sistance of spring 3I. The latch nose has an inclined cam edge 33 whose purpose will be described hereinafter.

In front of the platen is a transverse bar 34 supported by spring fingers upon the platen carriage and bearing a knife edge 35 directed toward the platen and serving for cutting off the typed There may also be one or more additional rollers 37 (Fig. 1)

carried by the platen carriage and engageable with the wrapped plies.

Rearwardly of the platen there is a carbon anchoring unit supported by the paper table 6. Said unit includes a bar 38 disposed crosswise of a pair of upstanding pins Each pair of pins removably holds a set of carbon sheet anchoring bars 40. The bars in each set are fixed to interposed spacing blocks and the bars and blocks are apertured to receive the pins. The bar 38 also has two depending pins 4I near its ends. Normally the bar rests upon the rear end margin of the paper table and the latter has downwardly turned lugs 42 which are engaged by the pins M to hold the unit against forward shifting along the paper table.

- blank spaces.

' bon sheet anchoring bars l1.

fore and aft grooves 43to engage and guide the depending pins 4|. The paper table may be made of a metal sheet bent or crimped to form said grooves.-

For elevating the rear carbon sheet anchoring unit to release it for forward travel along the paper table there is an approximately U-shaped bail 44. The latter has a medial portion extending along and adjacent the rear edge of the paper table, and legs extending forward to a point in advance of the platen shaft and overlying said shaft. At their forward ends said legs are pivoted to the platen carriage, as at 45. A pair of earns 46 are fixed to the platen shaft at points located directly beneath the legs of the bail to engage the latter and rock the bail upward slightly, thus raising the rear end thereof. The work plies extend rearward and downward from the rear edge of the paper table and overlie the medial portion of the bail 44. The cams 46 are so formed andso disposed on the platen shaft that when the platen is in a position with its work clamping bar disposed uppermost the legs of the bail will rest upon a low portion of the cams and the medial portion of the bail will be disposed in its lower, inoperative position, as shown in Fig; 1. Upon forward rotation of the platen, however, the high points of the cams immediately engage the bail legs and elevate the rear end of said bail. The rear or medial portion of the bail lifts the work plies and the latter lift the carbon sheet anchoring bars and the cross bar 38, to free the pins 4| from the lugs 42 on the paper table, as shown in Fig. 12, and permit the anchoring unit and the set of carbon sheets anchored thereto to travel forward along the paper table. The rear set of carbon sheets are employed to materially increase the number of carbon copies made in a single typing operation, as will be explained hereinafter. v

A fanfolded web W may be employed in the typewriter. In the present instance this web has five folds or plies designated a, b, c, d and e. The number of folds may be varied, however. As shown in Figs. 24 and 25 I have devised a web whose printed forms are arranged in a manner for proper cooperation with the front and rear sets of carbons. Fig. 24 shows one face of the web wherein the webs a, c and e have their printed forms similarly disposed and alternating with The intervening webs b and d also have their printed forms alternating with blank spaces, in staggered locations with relation to the forms on the first webs, and inverted. As shown in Fig. 25 the opposite face of the web has the printed forms located opposite the blank spaces of the first face. Also, the form printing on the plies b and d is upright while the form printing on the plies a, c and e is inverted. The purpose of this staggered and inverted arrangement of the forms will be explained hereinafter.

In preparation for typing the platen is positioned with its work-clamping bar 20 uppermost and said bar is swung upward to uncover the car- The latter are swung rearward, a set of carbon sheets C are mounted thereon and the bars are swung back into place. Carbon sheets C are mounted on the rear sets of web W is interleaved with both the carbon sheets C and the carbon sheets C, the web extend ng across the frame bar II which is now elevated clear of the platen channel I0. C extend forward from the platen and have their carbon faces directed upward and the sheets C the second row of anchoring bars 40 and the fanfold' The carbon sheets extend from the rear edge of the paper table forward toward the platen and have their carbon faces directed downward. The topmost one of the sheets C overlies the topmost work web ply e.

Having so arranged the carbon sheets and work web plies the clamping bar 20 is swung back to operative position over the 'superposed carbon sheets and work web plies, the floating anchoring bars I! automatically finding their proper positions radially of the. platen. The button 32 of the latch 30 is then manually depressed to release the latch. Thereupon the springs 24 at the ends of the platen pull the radially shiftable frame ll inward and dispose the clamping bar 20 at the mouth of the channel H) in position to clamp the superposed plies in the channel. The length of the fanfold web extending forward from the platen is folded back over the bar 20 and over a following form length of the web back of the platen, and the platen is rotated forward, that is counter-clockwise with reference to Figs, 4 and 5. Engagement of the front roller 36 with the folded back length of web causes the latter to be wrapped around the platen. The following form length of the web, with its interleaved carbon sheets C, is also wrapped around the platen beneath the folded back front length, as shown in Figs. 5 and 13. At the beginning of the platen rotation the bail 44 is elevated by the cams 46 to unlatch the anchoring means for the rear carbon sheets C. This permits said sheets to follow the web forward along the paper table and wrap around the platen. The platen is rotated three quarters of a revolution or more. If required, suitable stops may be provided to limit its rotation in both directions.

Since the front carbon sheets C are placed on the machine face up they will face inward toward the platen when folded back with the work web and wrapped around the platen. Since the rear carbon sheets C are placed face down upon the machine and are directly wrapped around the platen without reversal they also will face inward toward the platen. The alternating, staggered and inverted arrangement of the printed forms on the faces of the web W disposes said forms in proper relation to the carbon sheets and in proper position for typing. Referring to Fig. 24, the first row of forms at the top will be interleaved sheets C and will be folded back over the clamping bar 20 before wrapping around the platen. Therefore their printing is upright. The second row of forms will be interleaved with the rear carbon sheets C and wrapped around the platen beneath the first row. Since the first row of forms is folded back before wrapping whereas forms is not, the printing of the second row is inverted to register properly with the overlying first row.- The rows are repeated in pairs along the length of the web.

When the latch 30 is released, prior to rotation of the platen, the outer end of the lever 21 will swing above the nose of the latch. Upon forward rotation of the platen to wrap the forms, the pin 28 on said lever will engage the cam edge 33 of the latch and force the latch out of the way against the resistance of its spring.

The platen has a line space ratchet wheel 41 and any suitable line spacing mechanism may be employed to rotate the platen for line spacing as the forms are typed. At the conclusion of a form typing operation'the platen is rotated back to the position shown in Fig. 4. This causes the lever 21 to be rocked by engagement of its pin with the .front carbon A 28 with the latch 30 to elevate the frame II and shift the parts supported thereby clear of the platen channel. The backward rotation of the platen unwinds the underlying forms, the weight of the web back of the paper table pulls said forms rearward along the table as they are unwound and, by frictional engagement of the web with the interleaved carbon sheets C and the carbon anchoring rods 40, the rear carbon sheet anchoring unit is slid rearward along the paper table and relatched at the rear edge of the latter.

Each forward carbon sheet C has a notch N at its forward end. and the edges of superposed forward plies are grasped at a point in register with said notches and indicated by a mark M on the web, and pulled forward one form length, thereby stripping the first typed form length of the web from the anchored front carbon sheets C and stripping the following typed form length from the rear carbonsheets C. Again the platen is rotated forward and the stripped forward form length is torn off along the knife 35. Next, the platen is rotated back to starting position, the web is pulled forward to strip the second form length from the front carbon sheets G. Then the platen is rotated forward to wrap the third and fourth form lengths around the platen for typing and said typed and stripped second form length is torn ofi. along the knife edge. If considered more convenient however, after a typing operation, the web may be drawn forward two form lengths and then torn off, the two torn off, joined form lengths being afterward separated in any suitable manner.

It will be seen that my invention provides a satisfactory means for simultaneously typing two sets of superposed forms. When the typing of only a single set of forms is required adjustment is readily made for that purpose by merely removing the rear carbon sheets and their anchoring unit.

Fig. 15 shows a modified mounting for the forward carbon sheet anchoring bars I1. Here said bars are pivotally mounted upon the clamping bar 20. The latter bears the pivot and stop pins l6 and I9 respectively and the frame bar H is recessed or apertured to receive the lower ends of said pins.

Fig. 16 shows a modified mounting for the clamping bar 20. Here said bar is pivoted, as at 48, to swing laterally instead of vertically and a tongue 49 fixed to the opposite end of the frame bar II has a lateral slot 50 to receive the knob shank 23 on the bar 20 and hold the bar down.

Figs. 17 to 20 inclusive, show a platen 5| of modified form. This platen is formed with a longitudinal slot 52 acctgimodating' the carbon sheet anchoring bars IT. The slot terminates short of the ends of the platen and an integral peripheral portion of the platen defines the outer wall of the slot. It overlies the bars I! and forms a holding bar 53 for the work plies which are trained through the slot. Screws 54 serve as pivots for the bars I]. The screws are inserted through apertures in the bar 53 and screwed into threaded apertures 55 in the body of the platen. The stop pins I9 for the bars I! are also inserted through the bar 53. As before, the bars I! are free to swing rearward but are held from swinging forward by the stop pins. By removal of the pivot screws from the platen the bars I! may be detached from the slot.

As shown in Figs. 21, 22 and 23, provision is made for simultaneously making long abstracts of lists of forms and the typing thereon of only a small area of the matter typed on each form, and for variably shifting forward the forms and the abstract lists. For this purpose an abstract sheet or ply 51 is superposed on the web W and trained therewith beneath the clamping bar 20. A carbon sheet C is interposed between the abstract sheet and the topmost ply of the web W and with its carbon face directed upward toward the abstract sheet. For anchoring the carbon sheet an additional anchoring bar 58 is provided. Said bar may be mounted along with the bars l1. Or, as shown in Fig. 23, it may be pivoted to the under side of the clamping bar 20. It anchors the rear edge of the carbon sheet C and the latter normally extends forward from the platen. In order to avoid typing all of the form matter upon the abstract sheet the carbon sheet C may be made short, or, as indicated in Fig. 21, it may have a stripe of carbon upon only a short portion of its area. After each form typing operation the abstract sheet is shifted forward but to a less extent than the web W. To indicate the proper degree of shift for the abstract sheet the latter has longitudinally spaced marks 59. These marks are registerable with the clamping bar 20 or other suitable fixed index. When wrapped around the platen the abstract sheet and its carbon underlie the forward form length of the web 20. The invention thus simplifies and greatly facilitates the making of abstracts.

What I claim is:

1. In a typewriter, a platen, means for holding a series of superimposed sheets to said platen on a transverse line remote from the ends of said sheets to cause them to fold over on themselves and wrap around said platen when the platen is rotated, means at the rear of said platen for holding the rear ends of a series of carbon paper sheets interleaved between said first sheets, and means on said platen for holding the rear ends of a second series of carbon paper sheets interleaved between said first sheets in front of said transverse line. 2. In a typewriter, a platen, means for holding a series of superimposed sheets to said platen on a transverse line remote from the ends of said sheets to cause them to fold over on themselves and wrap around said platen when the platen is rotated, and two series of sheets of carbon paper between said first sheets andon opposite sides of the clamping line, the carbon paper sheets in front of said transverse line having the carbon side up and those in the rear having the carbon side down whereby when said first sheets and interleaved carbons are folded on themselves all of the carbon sides of said carbon sheets will face said platen.

3. In a typewriter, a rotatable platen, means for holding a series of superimposed sheets to said platen to cause them to wrap around the same when the platen is turned, carbon holding 4. In a continuous manifolding typewriting machine, a rotatable platen, means for holding a plurality of superimposed sheets to said platen on a transverse line spaced from the ends of the said sheets to cause them to wrap around the same when the platen is turned, a carbon sheet anchoring bar at the rear of the platen to hold a carbon sheet interleaved with said first sheets, releasable locking means for said bar to hold it and the carbon sheet against forward movement when said first sheets are drawn forward across the platen, a cam rotatable with the platen, means operable by said cam to release said locking means, permit said carbon sheet anchoring bar to shift forward and thereby permit the carbon sheet to follow said first sheets when the latter wrap around the platen, and guide means to guide said carbon sheet anchoring bar for fore and aft shifting.

5. In a typewriting machine, a platen having a longitudinal channel in its periphery to receive work plies therethrough, a work clamping bar overlying the bottom of said channel to hold the work plies clamped along a transverse line, a mounting for said bar supporting it to shift radially of the platen toward and from the channel bottom, a carbon sheet anchoring bar mounted to shift with said clamping bar, a spring tending to hold the clamping bar shifted inward to clamping position, and a manually releasable latch to hold the clamping bar shifted outward to release position against the resistance of said spring.

6. In a typewriting machine, a platen having a longitudinal slot in its periphery to receive work plies therethrough, a work clamping bar overlying the bottom of said channel to hold the work plies clamped along a transverse line, a mounting for said bar supporting it to shift radially of the platen toward and from the channel bottom, a carbon sheet ancho'ring bar mounted to shift with said clamping bar, and a spring tending to hold the clamping bar shifted inward to clamping position.

'7. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal recess in its periphery to receive superposed work plies therethrough, a carbon sheet anchoring bar carried by the platen in said recess to hold a carbon sheet interleaved with the work plies, and a pivotal mounting for said bar at one end thereof adapting the bar to swing in one direction away from said recess about an axis disposed approximately radially of the platen, and means locking said bar against swinging in the opposite direction from said recess.

8. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal recess in its periphery to receive superposed work plies therethrough, a plurality of carbon sheet anchoring bars carried by the platen in said recess to hold carbon sheets interleaved with the work plies, pivotal mountings for said bars adjacent the opposite ends of the platen adapting the bars to swing in one direction away from said recess about axes disposed approximately radially of the platen, and means looking said bars against swinging in the opposite direction.

9. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal recess in its periphery to receive superposed work plies therethrough, a set of carbon sheet anchoring bars carried by the platen in said recess to hold carbon sheets interleaved with the work plies, and mountings for said bars permitting them to shift freely independently of each other approximately radially of the platen to accommodate them to the work plies.

10. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal recess in its periphery to receive superposed work plies therethrough, 'a set of carbon sheet anchoring bars carried by the platen in said recess to hold carbon sheets interleaved with the work plies, mountings for said bars permitting them to shift freely independently of each other approximately radially of the platen to accommodate them to the work plies, and work-retaining means to hold the work plies in the platen recess.

11. In a continuous manifolding typewriting machine, a rotatable platen having a' longitudinal recess in its periphery to receive superimposed work plies therethrough, two sets of carbon sheet anchoring bars carried by the platen in said recess, the bars of the two sets being disposed adjacent and alongside of each other in the recess, and mountings ting each bar to shift independently of the other bars of both sets approximately radially of the platen to accommodate the bars to the work plies.

12. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal channel in its periphery to receive superimposed work plies therethrough, a plurality of carbon sheet anchoring bars carried by the platen in said channel to hold carbon sheets interleaved with the work plies, pivotal mountings for said bars adjacent the opposite ends of the platen bar for bodily shifting radially of the platen toposition the carbon sheet anchoring bars and the .work plies clear of the platen channel.

13. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal channel in its periphery to receive superposed work plies therethrough, a carbon sheet anchoring bar carried by the platen in said channel to hold a carbon sheet interleaved with the work plies, a work web retaining bar extending along and overlying said channel and carbon sheet anchoring bar and shaped to form part of the peripheral surface of the platen, and a pivotal mounting for said carbon sheet anchoring bar supporting it to swing relatively to said retaining bar.

14. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal channel in its periphery to receive superimposed work web plies therethrough, a work-retaining bar extending longitudinally of the platen at the mouth of said channel and shaped to form part of the platen periphery, means supporting said bar upon the platen to shift radially of the platen to and from the channel mouth, a carbon sheet anchoring bar beneath said retaining bar to hold a carbon sheet interleaved with the work web plies, and means supporting said carbon sheet for said bars permitanchoring bar to shift radially of the platen with the retaining bar and to swing about one end relatively to the retaining bar.

15. In a continuous manifolding typewriting machine, a rotatable platen having a longitudinal recess in its periphery to receive superimposed work plies therethrough, and a longitudinal bar overlying and spaced from the bottom of said recess and integrally formed with the platen and forming part of its periphery, said recess opening through the platen at the opposite edges of said bar and a carbon sheet anchoring bar mounted in said recess beneath said platen bar.

16. In a typewriter, a rotatable platen, means supported for movement toward and from the platen at the rear end of the platen for holding at their rear ends forwardly extending superimposed carbon sheets, means rotative with the platen for clamping to the platen the carbon sheets held by said carbon sheet holding means and superimposed work plies with which the carbon sheets are interleaved to cause the work plies and carbon sheets to wrap around the platen when the platen is rotated, releasable looking means for holding the carbon sheet holding means against movement toward the platen with said carbon sheet holding means moved away from the platen, and means operable to automatically release said locking means when the platen is rotated to wrap the clamped work plies and carbon sheets therearound.

17. In a typewriting machine, a platen having a longitudinal channel therein, a work ply clamping bar for clamping superposed work plies to the platen and mounted on the platen to shift toward and from the channel bottom respectively to and from work ply clamping position, a spring urging said bar toward the channel bottom into work ply clamping position, and latch means for holding said bar shifted against the resistance of said spring away from the channel bottom in a position for free passage of superposed work plies across the channel between the bar and the channel bottom.

18. In a typewriting machine, a roller platen having a longitudinal channel in its periphery, a work ply clamping bar extending longitudinally of the platen, means supporting said bar on the roller platen to shift radially of the platen from a work ply clamping position in said channel to a work ply releasing position out of said channel, in which latter position said means supports the bar for free passage of superposed work plies across the channel between the bar and the channel bottom, a spring urging said bar into work ply clamping position, and a latch for holding said bar in work ply releasing position against the resistance of the spring.

19. A continuous billing attachment for typewriting machines having a revoluble platen, comprising in combination, a frame adapted for attachment to a typewriting machine and over which an interleaved record and relatively short transfer sheets are adapted to pass to the typewriting machine when the platen thereof is revolved in the feeding direction, means carried by the frame for engagement with the transfer sheets when the platen is revolved a predetermined distance in the reverse direction, said means holding the transfer sheets against movement when the interleaved record is again moved in the feeding direction, and means independent of the transfer sheet holding means for disengaging the transfer sheets therefrom, thereby permitting of the simultaneous feeding of the interleaved record and transfer sheets.

20. A continuous billing attachment for typewriting machines having a revoluble platen, comprising in combination, a frame adapted for attachment to a typewriting. machine and over which an interleaved record and relatively short transfer sheets are adapted to pass to the typewriting machine when the platen thereof is revolved in the feeding direction, means to which said transfer sheets are attached, and means on the frame for engagement with said first means when the platen is revolved a predetermined distance in the reverse direction, said means holding the transfer sheets against movement when the interleaved record is again moved in the feeding direction, and means independent of the transfer sheet holding means for disengaging said first means, thereby permitting of the simultaneous feeding of the interleaved record and transfer sheets.

21. A continuous billing attachment for typewriting machines having a revoluble platen, comprising in combination, a frame adapted for attachment to a typewriting machine and over which an interleaved record and relatively short transfer sheets are adapted to pass to the typewriting machine when the platen thereof is revolved in the feeding direction, means to which the rear ends of said transfer sheets are attached, means on said frame for engagement with said first means when the platen is revolved a predetermined distance in the reverse direction, said means holding the transfer sheets against movement when said interleaved record is again moved in the feeding direction, and releasing means independent of the transfer sheet holding means for disengaging said first means and the transfer sheets attached thereto, from said holding means, thereby permitting of the simultaneous feeding of the interleaved record and transfer sheets.

22. A continuous billing attachment for typewriting machines having a revoluble platen, comprising in combination, a frame adapted for attachment to a typewriting machine and over which an interleaved fanfolded record and relatively short transfer sheets are adapted to pass to the typewriting machine when the platen thereof is revolved in the feeding direction, a transverse bar having means on each end to which the rear ends of said transfer sheets are detachably connected, said sheets being connected alternately by said means to oneend or the other of said transverse bar whereby said sheets may be interleaved from bothsides of said fanfold record, said bar and said frame having interengaging means thereon, which interlock when said interleaved record is moved rearwardly by rotation of said platen, thereby holding said transfer sheets against forward movement when said interleaved record is again moved in the feeding direction, and a lever for disengaging said bar from said frame thereby permitting of the simultaneous feeding of the interleaved record and transfer sheets.

23. A continuous billing attachment for typewriting machines having a revoluble platen, comprising in combination, a frame adapted for attachment to a typewriting machine and over which an interleaved record and relatively short transfersheets are adapted to pass to the typewriting machine when the platen thereof is revolved in the feeding direction, a transverse bar to which the rear ends of said transfer sheets are detachably connected, said bar and said frame moved in the feeding direction, and means actuhaving interengaging means thereon, which inated automatically by rotation of the platen for terlock when said interleaved record is moved disengaging said bar from said frame thereby rearwardiy by rotation of said platen, thereby permitting of the simultaneous feeding of the 5 holding said transfer sheets against forward interleaved record and transfer sheets.

movement when said interleaved record is again EDWARD Z. LEWIS.

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