US2083446A - Typewriter ribbon attachment - Google Patents

Description

June 8, 1937. J. c. HOCHMAN TYPEWRITER RIBBON ATTACHMENT Filed Jan. 7, 1952 2 Sheets-Sheet 1 1 ii-E1 I i INVENTOR Jig/321,5 6070072172012 ATTORNEYS June 8, 1937.

, J. c. HOCHMAN TYPEWRITER RIBBON ATTACHMENT 2 sheets-sheet 2 Filed Jan. 7', 1952 INVENTOR JaZJ 'QS (lj m'limn 95 Q BY M $5.42 wax-: ATTORNEYS Patented June 8, 1937 UNITED STATES PATENT OFFICE Application January 7,

46 Claims.

My present invention is concerned with the ribbons or other inking or duplicating agency of typewriting machines, adding machines, addressing machines, cash registers and other mech- 5 anisms of the character in which individual numerals or letters are successively imprinted each such imprint appearing concurrently on one or more sheets.

It is an object of the invention to provide a 10 duplicating device for a machine of the above type of extremely simple construction, which may be conveniently coordinated with respect to the sheet or sheets to be imprinted, without alteration in the construction or design of known machines of 15 the characterby the use of which extra copies were heretofore produced by resort to carbon p p r.

Another object of the invention is to provide a ribbon holder which may be made of a single blank of stamped or molded material and which may be coordinated with particular facility with respect to the sheets to be typed.

Another object is to provide a ribbon holder especially convenient in dimensions and propor- 25 tions for compact packaging and which may be coordinated with a typewriting machine by a single thrust, without the need for further adjusting or fastening operations and will maintain the ribbon in correct correlation with respect 30 both to the platen and to" the imprinting type bars.

Another object is to provide a ribbon holder of the above type which admits of a choice of alternative positions for wear of different parts of 3 the ribbon depending on the selective positioning of the frame with respect to the typewriting machine, and in which the mount has yet suflicient lost motion to permit automatic shift in the area of ribbon subjected to impact in the course of use.

Another object is to provide a ribbon holder of the above type which shall be wholly inobtrusive with respect to the normal operations of the typewriting machine for typing, line spacing, carriage shift, upper case shift, tabulator operation and the like.

Another object is to provide a ribbon holder construction of the above type in which a plurality of units identical in every way may conveniently be utilized simultaneously for producing a corresponding plurality of extra copies.

Another object is to provide a ribbon holder of the above type which readily admits of prepara- 55 tion of some of the copies in one color and simul- 1932, Serial N0. 585,210

taneous preparation of other copies in one or more contrasting colors.

Another object is to provide a ribbon holder of the above type which admits of change from one color to another of any portion of any one or more of the copies without removal of the device from the machine but by a simple thrust.

A feature of the invention is the use of a typewriter ribbon frame to extend the length of the platen and provided with mounting portions at the ends of said frame unitary therewith, and yielding means for retaining said mounting portions in proper correlation with the frame of the machine. The yielding means may be unitary with the carriage of the typewriting machine but in certain advantageous embodiments this yielding means comprises a resilient arm or arms unitary with the ribbon frame and resiliently held with respect to a portion on the typewriter carriage.

The ribbon frame may be a flat stamping extending in front of the platen, with ribbon mounting facilities at the ends thereof, or the arms of said frame may be curved for adaption to the curvature of the platen. The holding or I mounting means for the ribbon frame may comprise end extensions to rest upon the side frame of the typewriter carriage, or resilient end arms unitary with the frame resiliently to engage the edges of the cover plates of the side frames, or the resilient arms may extend rearward from the ribbon frame for clasping engagement about the platen. In the latter case these arms hav ing associated loops or stops for coaction with some fixed part of the carriage, such as, for instance, a bail or bar to limit such ribbon frame against excessive movement in the rotation of the platen.

In the accompanying drawings, in which are shown one or more of various possible embodiments of the several features of the invention, Fig. 1 is a perspective view of a typewriter carriage indicating the mode of installation of the typewriter frame,

Fig. 2 is a front view showing detailed construction of the frame and the choice of positions thereof,

Fig. 3 is a transverse cross sectional view on a larger scale taken on line 33 of Fig. 1,

Fig. 4 is a fragmentary plan view of the frame holder,

Fig. 5 is a perspective view of one desirable form of clip,

Fig. 6 is a perspective view of another form of ribbon carrying frame,

Fig. 7 is a fragmentary detail showing a ribbon mount for the alternative form of. Fig. 6,

Fig. 8 is a cross sectional view taken on line H of Fig. 7,

Fig. 9 is a'view similar to Fig. 7 of-anothe'r embodiment,

Fig. 10 is a transverse sectional view taken on line llllof1"ig.9,

Fig. 11 is a pe spective view showing a loop mount embodiment of ribbon holder,

Fig.- 12 is a front view of another form of ribbon mounting frame in place on a platen,

Fig. 13 is a transverse sectional view taken on line ll-II of Fig.12,

Fig. 14 is a fragmentary front view indica another construction of ribbon holder and the association thereof with the typewriter construction, and r Fig. 15 is a perspective view of an end of the frame of Fig. 14.

Fig. 1 of the drawings shows illustratively the carriage C of a typewriting machine which hasside frames F between which is disposed a platen P. The primary ribbon 1' extends from one to the other of two ribbons spools B in front of the machine in coordination with the typewriting machine.

In-lieu of the usual carbon paper the present invention contemplates the use of auxiliary ribbons, one of the frames therefor being shown in position in Fig. 1 at R.

Referring to Fig. 2 which shows the details of the ribbon frame R, the frame may consist of a unitary sheet metal stamping comprising a longitudinal bar 20 extending nearly the length of the platen, having downwardly extending arms or legs 2| at the opposite ends thereof, each equipped with a unitary ribbon clipping conformation 22 coacting with the ribbon clip 2! crimped to the corresponding end of the ribbon length 2.

While the ribbon mounting clip of my prior Patent No. 1,826,074 could be used to advantage in the present embodiment I have illustratively shown a modified form of clip, this clip comprising a sheet metal piece 23 having its outer edge turned over along oblique fold 24 presenting a free edge 29 parallel to the folded edge. A notch 26 is provided through the fold 24 near the upper end thereof, and the metal above the notch 28 is bent inward on a fold 21 parallel to but spaced inward with respect to edge 24.

The frame supporting arm 2| has an oblique edge 28 adapted to lodge in the sheath formed by the turned over part 29 and has a latch 28' protruding through the notch 26 and thereby eflecting the desired lock. The spring clip here disclosed is, of course, of more general application to ribbon holders of the type shown in my prior patent.

The frame has lateral extensions 30 and II at opposite ends thereof, affording supports 22 and 33 respectively to rest upon the side frames F, with the bar R over the sheets and the ribbon length 25 between two of the sheets, as best shown in Fig. 1.

To retain the-frame in position with sufficient security during typing, there are placed on each of the side frames F of the carriage spring retainers best shown in Figs. 3 and 4. Each of these retainers preferably comprises a blank of sheet metal 36 extending longitudinally of the frame, having lateral flanges 31 overlapping the sides of the frame and secured in position at one end by a screw as which may be one of the screws that aosaue secures the faceplate to the side rmner. The spring leaf extends forward at ll and has a longitudinally bent nose ll to engage the upper edge of mits the use of a plurality of such ribbon frames simultaneously as more fully set forth herein- 7 after.

Preferably the ribbon frame is provided with unitary means for permitting a choice in the selection of ribbon area exposed to impact. For this purpose the support lug II is provided with an extension II therebeyond, affording a rest edge ll therebelow preferably connected to the rest edge 22 by an inclined surface I2. Similarly the opposite support Ol which is near the outer extremity of the frame, is equipped with an additional resting edge N at lower level and adjacent arm 2|. the two rest surfaces 23 and I4 being connected by an oblique edge I. Thus the frame affords in addition to the rests l2 and 33 shown in operative position in Fig. 2, additional rests II and I at lower level and to the left of the first rests. The latter rests may be brought into operation by simply shifting the frame as shown in Fig. 2 to the dot and dash position in which the frame would readily ride up along inclined edges l2 and to bring rests II and 54 into operation, thereby elevating the ribbon preferably through approximately half the width thereof and shifting the same to the right through a corresponding range.

By a thrust to the left the ribbon holder could as readily be shifted from the upper to the lower position shown in full lines in Fig. 2. In the shift of the holder from one level to another, it is obvious that the ribbon is likewise raised or lowered an equal distance. By this means the width of the ribbon may be considered as being divided into a plurality of writing levels, and that the particular level of the ribbonv which it is desired to subject to the type impact may be located along the writing line of the typewriter at the will of the operator.

In either of the two positions shown in Fig. 2 it is apparent that, the spring holders 36 are equally operative since the edge of the ribbon holder which coacts therewith in either position of the holder will be at the same level.

By the present arrangement accordingly, after a ribbon has become worn in one position of use of the frame, the disposition at the other of the 'of the platen and of the paper, the respective ribbons extending between successive pairs of sheets, and the spring ribbon frame retainers 36 all overlapping the entire series of ribbon holders. In such arrangement it will be apparent that all ribbon holders need not be used in the same one of the two alternative positions but some Gil may be in upper and some in lower position, depending on the wear of the ribbon or the choice of color type wanted for the respective copies.

As in the embodiment of the prior patent, the ribbon will be of such length that when in position on the frame it will exert tension which the resiliency of the frame will accommodate thus to maintain the ribbon taut.

While the use of a metal frame is generally desirable, advantages are obtained by making the frame of translucent or transparent composition A such as celluloid, phenol product and the like.

The transparency of such composition affords the distinct advantage of avoiding any obstruction of vision at the cross bar 28.

In the embodiment of Fig. 6 a frame of the general principle of that of Fig. 2 is shown, made wholly of a unitary piece of wire, corresponding reference numerals designating analogous parts .in the embodiments of Fms. 2 and 5. The longitudinal run 20' is reversely bent at one end to afford rests 33' inclined surface 55' and lower rest 54 adjacent arm 2|. At the opposite end the reversely bent wire affords rest 5| contiguous to inclined surface 52' and rest 32' from which extends the left arm 2|.

The ribbon frame of Fig. 6 is of such negligible width that it does not appreciably interfere with visibility.

Since the ribbon mounting clip of Fig. 2 is not adapted to the wire mounting arm, it is preferred in this embodiment to use a clip such as shown in Figs. 7 and 8.

The clip 68 is crimped as at 8| to the ribbon length and has two integral protruding hooks 82 at opposite edges thereof which become lodged in corresponding notches 63 in the ribbon mounting arms of the frame.

In Figs. 9 and 10 is shown another embodiment of ribbon mount in which the end-of each ribbon mounting arm 2la is flattened as at 84 and rivets 85, preferably two in number, afllx the ribbon end to the holder. In this embodiment the ribbon is not removable in respect to the simple wire holder frame, the unit being so simple and inexpensive that it is intended to be discarded in its entirety after the ribbon is spent. If desired, a form of ribbon could be used which admits of re-inking to regenerate the unit.

In Fig. 11 the ribbon is shown with a, unitary loop 10 stitched to the main length of the ribbon 12 as at H. The loop is to be telescoped over the arm 2| b of the ribbon frame, which arm if desired may be provided with a notch 13 at its lower end to accommodate the width of the ribbon, which again is of such length as to exert strain upon the frame.

In Figs. 12 and i3 is shown an alternative embodiment in which the ribbon frame has a longitudinal arm 88, finger tab 8| and ribbon carrying arms 82 with latching means 83 generally similar to those of the other embodiments, ex-

cept for the fact that the ribbon carrying arms end of each of the arms 85 extends in direction generally tangential of the platen and preferably has a loop 88 at its free end to engage the platen P.

Preferably the arms 85 are of such length and configuration that as the arm 82 is brought correctly to rest against the platen, looped end 88 is resiliently forced past the maximum bulge of the platen and loosely engages the platen in home position as shown.

Preferably the indentation 88 is somewhat wider than the bar to afford some freedom of back and forth movement for slight automatic shift of the ribbon during typingwhich movement is permitted due to the loose engagement of arm 85 with the platen as just set forth. The frame 80 is somewhat shorter than the distance between the side frames of the machine, thereby to permit freedom of displacement of the ribbon the hump 86, one or more further humps at 89 are provided. By this means there is afforded the possibility of setting the frame in two or more alternative positions relative to the platen to expose to type impact at will, either of two or more different regions of the ribbon width.

In this embodiment it will be seen that the ribbon frame is applied in position by a single thrust to retain the frame in coordinated relationin respect to the typewriter platen and yet to permit slight automatic shifting thereof during action, thereby to lengthen the life of the ribbon by exposing to type impact ever changing regions of the ribbon. The bar 81 retains the ribbon frame however in such position as to permit ready rotation of the platen as desired without disturbance of the ribbon frame.

In the embodiment of Figs. 14 and 15 is shown a conventional typewriting machine similar to that of Fig. 1, the side frames 98 each having the usual cover plate 9| which at its inner edge 92 protrudes beyond the carrying structure in the customary manner.

The ribbon frame 93 is similar in general construction to that of Fig. 2 or of Fig. 12, the ribbon arms 94 thereof being either straight or curved to accommodate the platen as desired and having the oblique conformation 95 for mounting of the ribbon clip (not shown). Integral with the outer edges of the arms 94 are resilient mounting arms- 96 protruding forward and upward therefrom with the free end 91 thereof to extend above the side frames. These resilient arms are corrugated as at 98 to resiliently engage and overlap the free edges 92 of the cover plates for resilient mount of the ribbon frame as a body between the two side frames, for coaction with the platen. Preferably the upper edges of the corrugations 98 are oblique, as shown at 99, and the space between the successive corrugations is considerably wider than the thickness of the cover plate 9|. Accordingly, the frame can yieldingly shift to the left or to the right slightly within the resilient limitations of the arm and can shift upward and downward through a range limited by the width of the corrugations 98, thereby to vary the impact area of the ribbon. By affording two or more of the corrugations on each arm 96, as shown, choice of selection in the width of ribbon exposed to impact is afforded, as is readily understood.

While the ribbon frame is shown constructed and arranged to afford both limited longitudinal movement and limited peripheral movement, it will be understood that the constructional features as described and claimed may be used to advantage for either longitudinal movement alone or peripheral movement alone, and the frame .may be disposed even in relation immovable to the typewriter frame during use.

It will thus be seen that there is herein described apparatus in which the several features of this invention are embodied, and which apparatus in its action attains the various objects of the invention and is well suited to meet the requirements of practical use. I

As many changes could be made in the above construction, and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall beinterpreted as illustrative and not in a limiting sense.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination of a printing machine including a carriage comprising a platen and a support frame therefor, a substantially flat ribbon frame having carrying means at the opposite ends thereof for a ribbon, said frame including mounting arms nearthe ends thereof coacting with contiguous portions of the carriage to retain the ribbon holder in coordinated relation with respect to the platen, said frame being constructed and arranged for emplacement in operative position upon the machine by a simple thrust, and for removal from the machine by a simple pull.

-2. The combination set forth in claim 30, in which the locating means affords limited freedom of movement for the frame with respect to the in all positions of adjustment of said frame on.

said carriage the ribbon thereof will extend in front of said platen and along the writing line of the machine, said carriage and said ribbon frame having near the opposite ends thereof coacting parts effecting a resilient mount of the ribbon frame.

4. The combination of a typewriting machine including a carriage having side frames and a platen therebetween, a ribbon holder comprising a frame including lugs supported by said side frames, means to retain said lugs in coordinated relation with respect to said carriage, said ribbon frame including arms extending downwardly in front of said platen and having a typewriter ribbon maintained taut between the lower ends of said arms, said frame being freely detachable from the typewriter independently of the retaining means.

5. The combination of a typewriting machine including a carriage having side frames and a platen therebetween, detachable holder carrying a ribbon adapted to be inserted between two sheets to be typed, said holder comprising an integral flat piece including a longitudinal bar and downwardly projecting arms in the plane of said bar, said bar projecting beyond said arms to afford supports on said side frames, the ends of said arms constituting mounts for a typewriter ribbon, said holder having limited-resiliency to maintain said ribbon taut, means to retain said holder in operative position, said holder being detachable from the typewriting machine independently of said retaining means.

6. The combination of a typewriting. machine including a carriage having side frames and a platen therebetween, a detachable auxiliary ribbon, frameadapted to be disposed with the ribbon between two sheets to be typed upon, said ribbon frame comprising a unitary metal wire U- shaped structure adapted to be supported by said side frames and to extend lengthwise of the carriage with downwardly extending arms adapted to mount the ends of a length of typewriter ribbon.

7. The combination of a typewriting machine including a carriage having side frames and a platen therebetween, a ribbon holder comprising a frame to extend longitudinally of the platen between two sheets of paper, rest means at the ends of said holder adapted to coact with said carriage frames, said rest portions being constructed and arranged for supporting the holder at any of a plurality of alternative levels for exposing at will different parts of the width of the typewriter ribbon to type impact.

8. The combination of a typewriting machine including a carriage having side framesand a platen therebetween, a ribbon holder comprising a unitary frame having integral downwardly ex tending arms mounting a length of typewriter ribbon and having lugs adapted to rest upon the carriage frames, and means associated with said lugs for maintaining said frame at a different level for exposing a different portion of the width of typewriter ribbon to type impact.

-9.'The combination of a typewriting machine including a carriage having side frames and a platen.therebetween, a ribbon holder comprising a unitary flat U-shaped frame with its arms extending downwardly and mounting, a length of ribbon, unitary end lu'gs on said frame coacting with the side frames of the carriage, and unitary inclined conformations on said lugs by which the frame can be conveniently shifted from one level to another.

-l0. The combination of a typewriting machine including a carriage having side frames and a platen therebetween, a ribbon holder comprising a unitary fiat U-shaped frame with its arms extending downwardly and mounting a length of ribbon, unitary end lugs on said frame coacting with the sideframes of the carriage, said lugs having a plurality of rest portions unitary therewith and at. different levels to permit exposure at will of various portions of the width of ribbon.

11. The combination of a typewriting machine including a carriagehaving side frames and a platen therebetween, a ribbon holder comprising a frame including downwardly extending ribbon holding arms to project between the side frames and longitudinal unitary lugs to rest upon the side frames, each of said lugs having a pair of rest portions. at different levels and an inclined slideway connecting said rest portions whereby the frame may be shifted from one level to another by a longitudinal thrust.

12. The combination of a typewriting machine including a carriage having side frames and a platen therebetween, a ribbon holder comprising a frame including downwardly extending ribbon holding arms to project between the side frames and longitudinal unitary lugs to restupon the side frames, each of said lugs having a pair of rest portions at different levels, a lower rest portion at one side being adjacent the corresponding arm and at the other side remote from the corresponding arm, and an upper rest portion at the latter side being adjacent the corresponding arm and at the other side remote from the corresponding arm.

13. As an article of manufacture a ribbon holder for a multiple-copy machine, said holder comprising a longitudinal bar, downwardly extending arms unitary therewith having unitary means at the lower ends thereof for mounting a length of typewriter ribbon, and having support portions unitary therewith protruding laterally beyond said arms for detachably supporting said holder in operative position, said support portions being formed for automatic location of the ribbon in operative position, said holder being adapted for quick detachment from the machine, as the method of moving the ribbon from operative position, while fresh paper is being inserted into the machine and when actuation of the machine without copy making is desired.

14.-As an article of manufacture a detachable ribbon holder for a multiple-copy machine, said holder comprising a frame having all parts thereof extending in substantially a common plane and including a longitudinal bar, downwardly extending arms conformed at the lower ends thereof for mounting a length of typewriter ribbon, and lugs extending in the common plane of said bar and laterally beyond said arms for detachably supporting said holder in operative position, said support portions being formed for automatic location of the ribbon in operative position, said holder being adapted for quick detachment from .the machine, as the method of moving the ribbon from operative position, while fresh paper is being inserted into the machine and when actuation of the machine without copy making is desired.

15. As an article of manufacture a ribbon holder for a multiple-copy machine, said holder comprising a frame havingall parts thereof extending in substantially a common plane and including a longitudinal bar, downwardly extending arms conformed at the lower ends thereof for mounting a length of typewriter ribbon, and lugs extending in the common plane of said bar and arms laterally beyond said arms, said lugs having a plurality of rest portions formed at different levels at the lower edges thereof.

.16. As an article of manufacture a ribbon holder for a multiple-copy machine, said holder comprising a frame having all parts thereof extending in substantially a common plane and including a longitudinal bar, downwardly extending arms conformed at the lower ends thereof for mounting a length of typewriter ribbon, and lugs extending in the common plane of said bar and arms and laterally beyond said arms, said lugs having a plurality of rest portions formed at different levels at the lower edges thereof, the lowermost edges of the rest portions being all at the extremity of the lugs toward one end of the frame and the upper all at the extremity of the lugs toward the opposite end of the frame.

1'7. As an article of manufacture a ribbon holder for a multiple-copy machine, said holder comprising a frame having all parts thereof extending in substantially a common plane and including a. longitudinal bar, downwardly extending arms conformed at the lower ends thereof for mounting a length of typewriter ribbon, and lugs extending in the common plane of said holder and laterally beyond said arms, said lugs having a plurality of rest portions formed at different levels at the lower edges thereof, the lowermost edges of the rest portions being all at the extremity of the lugs toward one end of the frame and the upper all at the extremity of the lugs toward the opposite end of the frame, the frames having slideways connecting the rest portions at different levels of the respective support lugs.

18. As an article of manufacture a typewriter ribbon frame comprising a flat unitary spring metal stamping including a longitudinal cross bar having downwardly extending arms at the ends thereof and laterally extending lugs also at the ends thereof, said lugs being of different lengths, the longer lug having a rest portion at higher level near the ribbon carrying arm and'a rest portion at lower level at its outer end, theshorter arm having upper and lower rest portions in complementary relation.

19. As an article of manufacture a ribbon holder comprising a unitary flat frame of trans parent material, including a cross bar having downwardly extending ribbon carrying arms and outwardly extending frame supporting lugs, said lugs being of different lengths and each having rest portions at two different levels connected by an inclined slideway, the outer rest portion of the shorter arm being at the higher level and the outer rest portion of the longer arm at the lower level.

20. As an article of manufacture a detachable ribbon carrying holder comprising a unitary length of wire including a main length reverse bent near its opposite ends and having downwardly extending ribbon carrying arm extremities, said reversely bent portions constituting rest lugs for the frame, said holder being adapted for quick detachment from a multiple-copy machine as the method of moving the holder from copy making position.

21. In a typewriting machine a carriage having side frames and a platen therebetween and a plurality of ribbon holders, each comprising a frame with downwardly extending ribbon holder arms and outwardly extending support lugs resting on the respective side frames, and a common spring holder at each of the side frames to maintain the respective ribbon carrying frames in correctly coordinated relation to the platen for producing a multiplicity of typed copies.

22. In a typewriting machine a carriage having side frames and a platen therebetween and a plurality of ribbon holders each comprising a frame with downwardly extending ribbon holder arms and outwardly extending support lugs resting on the respective side frames and a common spring holder at each of the side frames to maintain the respective ribbon frames in correctly coordinated relation to the platen, the support lugs on some of said ribbon carrying frames in-t cluding a plurality of alternative support rest portions to permit disposing said frames at alternative levels for exposing corresponding portions of the ribbon width to type impact, said ribbon carrying frames being constructed and arranged for ready coaction with the common spring holder for the various frames at any of the alternate levels'.

23. Atypewriter ribbon holder comprising a U-shaped frame of limited resiliency, Support portions adapted for removably resting upon typewriter carriage elements, a typewriter ribbon extending between the arms of said frame, and metalhooks affixed to the ends of said ribbon length and releasably engaged with respect to said arms, said support portions being formed for locating any of a plurality of alternate ribbon levels along the writing line of a typewriter.

plurality of alternate ribbon levels along the writing line of a typewriter.

26. A typewriter .ribbon holder comprising a U- shaped metal frame having limited resiliency, support portions adapted for removably resting upon typewriter carriage elements, alength of 1s typewriter ribbon extending between the ends of the ribbon arms, and rivet connections flrm-' ly aiii xing the ends of said ribbon to said arms, support portions being formedfor locating any of a plurality of alternate ribbon levels along so the writing line of a typewriter.

26. A typewriter ribbon frame including support portions adapted for removably resting upon typewriter carriage elementacarrying arms having tapered ends, each including a latch tooth,

a ribbon length with latch clips at the ends thereof for' coacting with said tapered ends each of said clips comprising a sheet of metalturned in obliquely at its outer edge to straddle the tapered end of-the carrying arm and having a notch at its turned in edge for accommodating the latch tooth. said support portions being formed for locating any of a plurality of alternate ribbon levels along the writing line of a typewriter.

27. The combination recited in claim 28 in which the fold line of the clip above the notch is parallel to and within the extended fold line below the notch.

28. As an article of manufacture a ribbon clip 40 comprising a sheet metal stamping having one extremity for attachment to the ribbon length,

having an oblique, free edge folded inward to afford a sheath for straddling a mounting arm, said fold having a notch near the upper end thereof, the fold line above the notch being within and substantially parallel to the extension of the fold below the notch.

29. The combination of a typewriting machine 7 including a carriage having relatively fixed parts ribbon frame having portions coordinated with respect to said carriage for automatic positioning of the ribbon along the writing line of the machine, said carriage and said ribbon frame having coacting parts eifecting a resilient mount of the ribbon frame, said mount being adapted for quick detachment of the ribbon frame from the machine as the method of moving the ribbon from writing position before fresh paper is in- 60 serted into the machine and when actuation of the machine without copy making is desired.

30. The combination in a printing machine of the type including a carriage comprising a platen and carrying means therefor, of a ribbon frame to mounting the ends of a length of ribbon, said frame havinglocating means of cam form unitary therewith and near the ends thereof to engage corresponding portions of the carriage, said camming locating means operating to raise and 7 lower the frame upon longitudinal shift thereof, and resilient means for retaining said locating means in position with respect to said carriage.

31. In a typewriting machine of the type including a carriage having side frames, a struc- 7 ture fixed with respect to and extending inward and including a rotatable platen, a detachable frame yieldingly in operative position.

83. In atypewriting machine of the type including a carriage having side frames. anda platen between said side frames: the combination therewith of a ribbon holder comprising a frame of limited resilience, a length of typewriter ribbon maintained taut by said frame, said frame 34. In a typewriting machine of the type including a carriage having side framu and a platen between said side frames: the combination therewith of atypewriter ribbon holder including a frame having curved end arms adapted to the platen, and having mounts to retain a typewriter ribbon in operative relation between said arms, said frame having one or more clasps unitary therewith to extend partially about said platen and having portions thereof adapted to coact with one or more elements of said carriage for retaining the frame in operative position.

35. In a typewriting machine of the type including a carriage having side frames and a platen between said side frames; the combination therewith of a ribbon frame having portions yieldingly embracing more than half the peabout said platen.

36. In a'typewriting machine of the type including a carriage. having side frames and a platen betweensaid side frames: the combination therewith of a typewriter ribbon holder including a generally U-shaped frame having arms curved in accordance with the platen, a length of ribbon extending between and tautened by the ends of said arms, spring arms extending rearward fromnear the opposite ends of the frame and integral therewith and yieldingly engaging the platen to prevent undesired separation of said frame and said platen, and means limiting the rotary movement of the frame.

37. In a typewriting machine of the type including a carriage having side frames and a platen between said side frames; the combination therewith of a ribbon frame including a ribbon maintained taut thereby in correct position relative to the platen. saidribbon frame including unitary parts extending about the platen to prevent undesired separation of said frame and said platen, and stop means associated with said parts to afford alternative positions for said ribbon frame peripherally with respect to said platen.

38. In a typewriting machine of the type including a carriage having side frames, a structure fixed with respect to and extending inward from said side frames, and a platen between said side frames; the combination therewith of a ribbon frame, an arm integral with said ribbon frame affording a pair of alternative stops adapted to be coordinated with said structure for corresponding alternative settings of said ribbon frame.

39. In a typewriting machine of the type including a carriage having side frames. 9. bar extending across said side frames, and a platen parallel to said bar and extending between said side frames; the combination therewith of a ribbon frame including ribbon mounting ends and,

having resilience to maintain a ribbon tautened between said ends, said frame including arms unitary therewith clasping the platen, each of said arms having an indentation for straddling said bar.

40. In a typewriting machine of the type including a carriage having side frames, a bar extending across said side frames, and a platen parallel to said bar and extending between said side frames; the combination therewith of a ribbon frame including ribbon mounting ends and having resilience to maintain a ribbon tautened between said ends, said frame including resilient curved arms integral therewith extending from the ends thereof and clasping said platen, said arms bent to form a pair of humps near the upper ends thereof, either of which alternatively may be disposed to straddle said bar.

41. As an article of manufacture, a ribbon holding frame including a spring metal stamping having a bar, curved arms extending forward from the ends of said bar, and having ribbon mounting conformations at the ends thereof, and curved spring arms extending rearward from said bar, said latter arms having humps therein for mounting facility.

42. In a typewriting machine of the type including a carriage having side frames and a platen between said frames; the combination therewith of a ribbon mounting frame including spring arms at the ends thereof for yielding engagement with said side frames to maintain a ribbon carried by arms fixed to said ribbon frame in coordinated relation with respect to the platen.

43. In a typewriting machine of the type including a carriage having side frames and a platen between said frames, the combination therewith of a typewriter ribbon frame having downwardly extending arms with ribbon mounting ends and outwardly extending spring arms for yielding engagement with said side frames.

44. In a typewriting machine of the type including a carriage having side frames with inwardly projecting cover plates and a platen between said side frames, a ribbon mounting frame adapted to be disposed in front of said platen, said frame having unitary therewith spring arms extending upward from opposite ends thereof, with notched formations to straddle the edges of said cover plates.

45. In a typewriting machine of the type including a carriage having side frames with inwardly projecting cover plates and a platen between said side frames, a ribbon mounting frame adapted to be disposed in front of said platen, said frame having unitary therewith spring arms extending upward from near the ends thereof, each of said spring arms having a corrugated face formation, any of the corrugations of which is adapted to embrace the edge of the cover plate, thereby to afford a choice in the positions of the ribbon frame relative to the platen.

46. In a typewriting machine of the type including a carriage having side frames with inwardly projecting cover plates and a platen between said side frames, a ribbon mounting frame adapted to be disposed in front of said platen, said frame having unitary therewith spring arms extending upward from opposite ends thereof, with notched formations to straddle the edges of said cover plates, each of said notched formations having a cam conformation and affording a gap of width greater than the thickness of said cover plate JULIUS C. HOCHMAN.

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