US2103734A - Typewriter - Google Patents

Description

DCC- 28, 1937. w. H. scHwnDTA TYPEWRITER Filed March 9, 1936 5 Sheets-Sheet4 l FIG.

INVENTOR wiLLl'AM H. SCHMIDT ATTORNEYS ,n 'funi/111111111111 Dec. 28, 1937. w. I-I. SCHMIDT TYPEWRITER Filed March 9, 1936 5 Sheets-Sheet 2 INvENToR WILLIAM H. SCHMIDT AToRNEYs Dec. 28, 1937. w. H. SCHMIDT TYPEWRITER Filed March 9, 1956 5 Sheets-Sheet 3 FIG. 8.

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INVENTOR WILLIAM H. SCHMIDT ATTORNEYS Patented Dec. 28, 1937 UNITED STATES PATENT OFFICE TYrEwm'rEa William H. Schmidt, Wauwatosa, Wis.

Application March 9, 1936, Serial No. 67,945

4 Claims.

This invention appertains to typewriting machines, and more particularly to novel means for producing copies on such machines.

It is now customary to utilize carbon paper between the original sheet and the copy or copies to be made. The handling of the carbon paper is objectionable, and much time is expended by the typist in placing and removing the carbon into and out of operative position, and the copy or copies made are of a diiferent character than the original.

Therefore, one of the primary objects of my invention is to provide multiple ribbons for producing the copies, whereby the use of carbon paper or other extraneous duplicating means is entirely eliminated, and whereby the copy or copies made will have substantially the same appearance as the original.' l

Another object of my invention is to provide a series of parallel ribbon stretches on the typewriter in front of the platen roller, so that a sheet can be placed in rear of each ribbon stretch for making the original and the duplicates, with means for feeding the ribbon stretches across the sheets in unison during the operation of the typewriter. Y

Another salient object of my invention is the provision of means for so arranging and disposing the ribbon stretches that the marking on both sides of the paper sheet by the ink on the ribbon will be prevented.

A-further object 'of my invention is the provision of novel means for utilizing a series of independent ribbon on a typewriter, whereby the original and duplicate copies can be conveniently and expeditiously made.

A further important" object of my invention is to provide novel means for forming the ribbons themselves, whereby the ink on the ribbon will not be transferred to the opposite faces of al sheet of paper. I

A still further object of my invention is to provide an improved means for making duplicate copies on a typewriter, which will be durable and to manufacture, and one .which can be incorporated with a typewriter at a small cost.

With these and other objects in view, the invention consists in thenovel construction, ar-

rangement, and formation of parts, as will be hereinafter more specifically described, claimed,

and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a top planl view illustrating a typeeilicient in use, one that will be simple and easy` writer diagrammatically, showing one form of m invention applied thereto.

Figure 2 is an enlarged, detail vertical section taken substantially on the line 2--2 of Figure 1, illustrating the guide employed for the ribbon 5 stretches.

Figure 3 is a similar view, illustrating a slightly modified form -of guide.

Figure 4 is a fragmentary vertical section through the lplaten roller of a typewriter and 10 associate parts, illustrating the guide for the ribbon.

Figure 5 is a fragmentary, longitudinal sec-` tional view taken substantially on the line 5 5 of Figure 1, illustrating the tension and slack takel5 up roller for the ribbon.

Figure 6 is a diagrammatic view in top plan, illustrating the use of a ribbon inked on one side only.

Figure '7 isa fragmentary top plan view illus- 20 trating a typewriter diagrammatically, showing another form of my invention in which the ordinary typewriter ribbon is utilized in conjunction with an independent ribbon.

Figure 8 is a fragmentary, top plan view illus- 25 trati'ng the use of two ribbons carried by the same spools, the view being of a diagrammatic nature.

Figure 9 is a view similar to Figure 8,' but showing the spools carried by the frame of the typewriter. 30

Figure 10 is a perspective view. of a preferred type of guide for the ribbon stretches.

Referring to the drawings in detail, wherein similar reference characters designate corresponding pa'rts throughout the several views, the 35 letter T generally indicates a typewriter, which can be of any preferred type or make.,

y Thus, the typewriter is of the usual construction and includes the frame I5 having the keyboard I6 and the reciprocating carriage I1 car- 40 rying the rotatable platen roller I 8. In front of the platen roller I8 is arranged the spaced ribbon guides I9, between which the type keys 20 are adapted to strike. 0n each side of the ribbon guides I9 are mounted the usual ribbon 45 spools 2i and 22 which are turned in the ordinary manner during the operation of the keys v2II and .the typewriter carriage.

` In the present instance, the spools 2| and 22 are not utilized for carrying `the ribbon, but act 50 as a feed mechanism, as will be later set forth.

In accordance with my invention, I utilize an endless ribbon 23, and this ribbon can be of substantially theordinary character, that is, the ink extends through the opposite faces thereof.

An intermediate portion of the ribbon is fed through the guides I9 to form a front ribbon stretch 24,I and overv the spools 2| and 22. 'I'he ends of the ribbon 23 are trained over guide rollers 25 and 26 and over small guide rollers 21 and 28 mounted on the carriage I1. 'Ihe small guide rollers 21 and 28 are arranged at the opposite ends -of the platen roller I8 in front thereof, so that'a rear ribbon stretch 29 will be provided.

The end roller 26 is rotatably supported by a bracket 30 rigidly connected `with the frame I5 of the typewriter. The roller 25 is rotatably supported by a U-shaped yoke 3|, slidably mounted on a bracket 32 rigidly secured to the frame of the typewriter. An expansion spring 33 is disposed between the yoke 3| and the typewriter frame, so as to normally urge the yoke and the roller outwardly, and thereby create a tension on the ribbon to take up slack therein.

I provide a novel guide for the `rear stretch 29 of the ribbon, and this guide is adapted to extend the full length of the carriage in front of the roller I8. 'I'he guide can be inthe nature of a attened tube 34, and the terminals thereof are secured to the carriage in any preferred manner, such as by brackets 35. The opposite sides of the guide tube 34 are provided with slots 36, so that as the ribbon stretch 29 is fed through the tube, a typewriter key actuated by the operator can make the desired impression. Obviously, the ribl bon contacting with the spools 2| and 22 will be Figure 7 ofthe drawings.

automatically fed thereby through the tube.

In use of my improved appliance, the original paper sheet 31 is placed in rear of the front ribbon stretch 24 and in front of the guide tube 34, and the copy 38 is placed in rear of the guide 34. Obviously, the original and duplicate sheets 38 are threaded into the typewriter in the usual manner, that is, between the platen roller I8 and the guide aprons 39 and 40.

It is preferred to mount and form the ribbon guide 34 in a novel manner, so that the same will also function as a separator for the sheets 31 and 38. Thus, by referring to Figure 10, it can be seen that the guide 34 can have formed thereon rearwardly extending arcuate fingers 4 I, which 4extend under the platen roller I8. These fingers 4| can be formed on a rear bar 42, and the terminals of the -rear bar 42 can be provided with laterally extending, rearwardly directed feet 43, which can be riveted or otherwise secured to the carriage.

In order to prevent the marking of the opposite sides of the original sheet 31 by the ribbon stretches 24 and 29, the inner face of the front wall of the guide tube 34 can have attached thereto a thin piece of materialv 44, which may be cellophane. If desired, the upper end of the guide tube 34 may be left open, as at 45. This is clearly shown in Figure 3 of the drawings. By leaving the guide 34 open at its top, the placing of the ribbon in the guide is facilitated.

I can eliminate the use of the cellophane strip 44, if the same proves objectionable, and in this instance, I can provide a ribbon 46 (see Figure 6) This ribbon 46 is only impregnated with ink on one side, and the other side or'face of the ribbon can be treated with some material, such as wax, which is impervious to ink. In this instance, it will be vnecessary to twist the ribbon at right angles, as indicated by the reference character 41, on opposite sides of the-spools 2| and 22.

If preferred and desirable, I can utilize an ordinary typewriter ribbon 48, as is illustrated in In this instance, the

ribbon 48 is paid on and off the usual spools 49 and 50. In conjunction with the ribbon 48, I utilize a separate endless ribbon 5|. 'I'he front stretch 52 of the ribbon 5| is arranged in rear of the ribbon 48 and directly in front of the platen roller 53. This stretch 52 may be held in proper position and fed through a guide of the same type and character as that shown in Figure 10. The ends of the ribbon 5| are trained over the rollers 54 and 55, which can be of the same character as the rollers 25 and 26.

To permit the feeding of the ribbon 5|, the same is trained over a feed roller 56. This roller 56 is rotatably mounted on a supporting stub shaft 51 carried by the frame of the typewriter, and the roller has formed thereon or secured thereto a pinion 58, which meshes with a rack bar 59 carried by the rear face of the carriage. Thus. during the travel of the carriage, the roller 56 will be turned so as to feed the ribbon.

In Figure 8 of the drawings, I have illustrated another form of my invention. In this form, I

. utilize a pair of ribbons 60 and 6|, which are fed ofi and on the same typewriter spools 62 and 63. These spools 62 and 63 are rotatably mounted on pins 64 carried by ears 65 formed on or secured to the front corners of the carriage 66 of the typewriter. The ribbons 60 and 6| can be formed similar to the ribbon 46, that is, the same are only provided with ink on their rear faces. The ribbons 68 and 6| are provided with parallel stretches 61 and 68 respectively, which extend the full length of the platen roller 69, and suitable guides 10 are provided for the stretches. The spools 62 and 63 are operated in the usual manner. In this form of my invention, the original and duplicate sheets are placed in the typewriter in the same manner as in the form rst described.

In Figure 9, I have illustrated another form of my invention, which is similar to that form shown in Figure 8 of the drawings. The main difference is that I provide spools 1| and 12 for the ribbons 13 and 14, and the spools are carried by brackets 15 and 16, which are secured to the frame of the machine instead of on the carriage.

While I have only shown two ribbons in Figures 8 and 9, it is to be understood that I can use as many ribbons onlthe spools as may be desired, so that more than one copy can be made at the time of the making of the original.

From the foregoing description, it can be seen that I have provided an exceptionally simple and durable means carried directly by the typewriter for making duplicate copies without the necessity of lproviding extraneous devices, such as carbon Papel'- By using two or more ribbons, a clear impression can be made on the duplicate copy, which will be similar to the original and not bear any resemblance to the ordinary copy made when carbon paper is employed.

Changes in details'may be made without departing from the spirit or the scope of my invention, but what I claim as new is:

1. The combination with a typewriter including a frame, a reciprocating carriage on said frame, a platen roller rotatably mounted upon the carriage, spaced ribbon guides on said carriage, and feed and take-up spools on the frame, of means for making an original and a duplicate copy on the typewriter including an endless ribbon, guide rollers for the ends of said ribbon, one

4of said rollers being spring-pressed, a longitudicarriage in front of the platen roller and in rear of the ilrstmentioned ribbon guides, the ribbon including front and rear stretches, the front stretch being threaded through the first mentioned guides and around the feed and` take up spools, thevrear stretch being trained through the longitudinally extending guide, the stretches being spaced to receive a sheet of paper therebetween, and means carried by the longitudinally extending guide for separating the sheets of paper one from the other, said means including rearwardly extending arcuate lingers disposed under the platen roller, a plate carried by the rear terminals of the lingers, and right-angularly extending attaching ears.

2. The combination with a typewriter including a frame, a reciprocating carriage on said frame, a platen roller rotatably mounted upon the carriage, spaced ribbon guides on said carriage, and

' feed and take-up spools on the trama-of means for making an original and a duplicate lcopy on the typewriter including an endless ribbon, guide rollers for'the ends of said ribbon, one of said rollers being spring-pressed, a longitudinally extending ribbon guide mounted upon said carriage in front of the platen roller and in rear of the rst mentioned ribbon guides, the ribbon including front andrear stretches, the front stretch being' threaded through the flrst mentioned guides and around the feed and take-up spools, the rear stretch being trained through'the longitudinally extending guide, the stretches being spaced to receive a .sheet ofpaper therebetween,

and means carried by the longitudinally extending guide for separating the sheets of paper one from the other, said means including rearwardly extending arcuate fingers disposed under the platen roller, a plate carried by the rear terminals of the fingers, and right-angularly extending attaching ears, the longitudinal ribbon guide having slots formed in its front and rear faces.

3. The combination with a typewriter includ-- ing a frame, a` reciprocating carriage on said frame, a platen roller rotatably mounted upon the carriage,v spaced ribbon guides on said carriage, and feed and take-up spools on the frame,

of means for making an original and a duplicate copy on the typewriter including an endless ribbon, guide rollers for the ends of said ribbon, one of said rollers being spring-pressed, a longitudinally extending ribbon guide mounted upon said carriage in front of the platen roller and in rear of the first mentioned ribbon guides, the

ribbon including front and rear stretches, the

front stretch being threaded through the rst mentioned guides and around the feed and takeup spools, the rear stretch being trained through the longitudinally extending guide, the stretches being spaced to receive a sheet .of paper therebetween, and means carried by the longitudinally extending guide for separating the sheets of paper. one from the other, said means including rearwardly extending arcuate iingers disposed under the platen roller, a plate carried by the rear terminals of the ilngers, right-angularly extending attaching ears. the longitudinal ribbon guide having slots formed in its front and rear faces, and a thin flexible strip carried by the inner face of the front wall of the longitudinal guide covering the slot in said front wall.

4. 'I'he combination with a typewriter including a frame, a reciprocating carriage on said frame, a platen roller rotatably mounted upon the carriage, spaced ribbon guides on said carriage,

and feed and take-up spools on the frame, of l means for making an original and a duplicate copy on the typewriter including, an endless riblstretch being threaded through the rst mentioned guides and over the feed and take-up spools, the rear stretch being trained through the longitudinally extending guider on the carriage and over the guide rollers on the carriage.

. WILLIAM H. SCHMIDT.

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