US903482A - Paper-guide for carriages of type-writing machines. - Google Patents

Description

T. L. KNAPP. v PAPER GUIDE-FOB OARRIAGES OF TYPE WRITING MACHINES.

APPLICATION FILED MAR. 16, 1906. 90394j82w Patented Nov. 10, 1908.

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paper guiding devices for ty UNITED 1STATES PATENT OFFIQIQO THERON L.

KNAPR: OF WOODSTOCK/ILLINOIS, ASSIGNOR TO THE OLIVER TYPEWRITER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PAPER-GUIDE FOR CARRIAGES OF TYPE-WRITING- MACmNES.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed hiarch 16, 1906. Serial No. 306,435.

thereon, which form a part of this specification.

This invention relates to improvements in )ewi'iting machines, and refers more speci cally to guiding devices for cards or small sheets of paper adapted. to hold the same in close contact with the platen when passing the printing point.

My improved paper guiding device is herein shown as applied to an Oliver typewriter machine of the general construction shown and described in the prior patent to Thomas Oliver, No. 599,863, granted March 1st, 1898, but said improvements may be applied to machines of other kinds to which they may be adapted.

As shown in, the accompanying drawings:-Figure 1 is a plan view of the paper carriage of a typewriting machine of the kind or type known as the Oliver machine, allowing the type-bar sup )orting frame, two type bars, the platen am the frame of the aper carriage ig. 2 is a cross-sectional view,

J Fig. 3 is a perspective view of the paper guides and the standard to which the same are attached.

As shown in the said drawings, A 'desig hates the rotative platen of the machine, the

shaft a of which extends through andhas ro tative engagement with the end plates B B of the carriage frame. Said platen shaft is provided at its ends with turning knobs, one of which is indicated at A C O designate the U-shaped type-bars of which there are two sets, one located on each side of the striking point of the type. Only one bar of each set is herein shown, said type-bars are supported on angular bottom frame lates D to which said type-bars are ivote D D are loop frames which rise rom said framesD D, and D an oblique support. against which the type-bars rest which supports the platen, taken on line when thrown backwardly from the platen. Said type-barframes are supported on the upper ends of standards E which rise from the base of the machine.

F indicates the forward, longitudinal member of the carriage shiftingframe, which latter has backward and forward shifting motions on the main frame of the machine (not shown in the drawings) for the purpose of efiecting the shifting movement of the platen to brin the same in position for the action thereon 0 one of the three types on eachtype-bar. F indicates the front rail of the said shifting frame, which is rigidly attached to the casting constituting said frame, of which the longitudinal member F forms a part. Said front rail F forms a track or support on which the forward part of the carriage, rests and travels in its endwis'e letter-spacing and return movements.

G designates the forward lower, horizontal, longitudinal frame bar of the carriage.

riage in the samemanneras shown in said Oliver patent hereinbefore referred to. A scale strip I, marked with a scale, is mounted at the rear of the upper feed roller H with its rear edge in contact with the platen, as shown in said prior atent.

J 2 designates the ower guide plate which is attached to the end plates of the carriage frame in rear of the platen and is inclined downwardly and forwardly to direct the-enterin margin of the sheet of paper between J indicates the upperguide plate and is located in position to receive the advance edge of the paper as it passes "rearwardly therefrom.

J indicates the upper longitudinal bar of the carriage which'serves to rigidly connect the end plates B B and is located above the upper guide'plate J K K indicate the usual guide fingers which are .adjustably mounted on the bar J and are Said rollers are supported on the paper, carfrom the platen to guide said paper away Said bar G is provided with rollers g which the p aten and the lower, rear presser roller H.

. used for to indicate the striking 'degree of elasticity or resiliency as to short platen the advance edges of large throw are not herein illustrated as they constituteno portion of the present invention. Thedrawing, however, shows four apertured bearing lugs If f f 1 which rise from the horizontal top p ate F on the standard F and to which the moving parts of said ribbon throw are pivoted. The drawing also illustrates a stop arm f which rises from the rear art of sai plate F and which serves, when t e ribbon throw is present, to limit the movement of the oscillatory parts thereof towards the platen. The drawlng also illustrates the letter space indicating arm L which is usually present. on the Oliver typewriting machine,

and which is attached to the rear faceof the standard F and extends horizontally over the platen with its rear or free end in position oint'of the type.

The parts of the mac 'ne above referred to are similar in construction to the corres 0nding parts shown in the prior patent to Sliver herelnbefore referred to, and need not be herein more fully described.

,Now referring to the features more particularly constltuting my invention, the same are constructed as follows:

M M designate two curved guide plates which are located above the platen at either side of the impression or printing point and at such distance therefrom that they will engage cards, tickets or sheets of aper which are too small to be engaged and guided by the 'usual paper guides K K. Said' guide plates are supported by means of arms" or are M M from the u per end of the standard F which sup orts the ribbon throw The guide-plates M K4 are curved to conform to the up er surface of the platen, and extend a istance circumferentially of the'same rearwardly from the rear edge of the scale strip I. Said guide plates MM are so arranged as to be practically in contact with or to press lightly upon the upper surface of the platen, or 1n other words, are at such distance therefrom as to hold small'sheets ofpaper or cards inc ntact with the laten. The supporting arms M M for suc plates have such mit a slight yielding of the plates toward and from th s platen, to compensate for paper or cards of varying thicknesses while at the same time said plates will hold the sheet of guiding and holding downwardly by the guide rollers H H and H "standard F paper or card in curved form, corresponding with the curvature of the platen, and thereby I they are generally of triangular shape or are made of considerable width at their margins which are attached to the supporting arms Li M, and tapered rearwardly towards their rear ends. u

The guide plates M M arranged as described are designed to hold in place and closely adjacent to the platen, the upper or. advance edges of cards" or small sheets of aper, after such advance edges shall have een advanced forward of the printing point thereby enabling the machine to operate properly with sheets of paper or cards which are too small to engage and be 'Iguided by the usual paper guide fingers K In other words,

said guide plates M, by en agen'ient with the end portions of a card, tic et or small sheet of paper, serve to confine or press said end portion thereof against the platen and to maintain the middle part thereof in contact with the platen while im ression point.

he arms M M attached to the standard 13 and extending rearwardly therefrom over the platen, as described, afford the spring or resilient support for said guide plates required to enable them to bear tightly and yieldingly on the laten and to thereby press the paper or card against the platen firmly enough to preventany of the sheet or card.

The arms M M which, as before stated, are attached to the standard F are made in one piece with each other, and are joined to a central horizontal base plate M which exlaten when. the impression is made. 2

passing the striking or buckling or wrinkling.

tends forwardly over and is secured to the top of thehorizontal plate F on the said Said base plate M is shown as provided with slots m through which pass screws m m which areinserted. at their lower ends in the plate F, by which the said base plate supporting arms, and the guide plates are adjustably secured to the standard F. In the particular construction shown, the contact arm f 2 for the ribbon throw is formed by means of an upwardly bent projection on a base plate f 3 which is interposed between plate F and the base plate M and secured in place by the same clamp screws m m The uide plates herein described resemble generally the paper guides described and claimed in the prior patent granted to Albert Swindlehurst, April 28th, 1903, No. 726,951 but difier therefrom by reason of the fact that they are designed for. use in printing cards and like small sheets and are arranged nearer the printin pointand so close together that they may e supported by a single central support, such as the standard F which sustains the ribbon throw of the machine. The paper guiding devices hereinbefore described also differ from those of saidSwindlehurst patent from the fact that the guide plates in my device are yieldinly supported or, sustained by arms whic pointof attachmentto the sup orting standard rearwardly in a horizonta direction to the guide plates and said arms are of spring or elastic c aracterand so arranged as to permit movement of the guide plates toward and from the platen by the bending or flexing of said arms, thereby rendering unnecessary the use of any sprlngs except those afiorded by the supporting arms themselves.

I claim as my invention z- 5 In a typewriting machine, the combination with a platen; a ca-rria e, acarriage shift frame and a central stan ard on the shiftframe which rises at the front of the platen,

extend from their 1 'ence of two witnesses,.this 13th day of of a paper-guide consisting of a sin le piece of sheet metal shaped to form two laterally separated spring arms; a transversely extending'lowerfpart connecting the lower ends of said arms and enlarged parts at the upper ends of said said aper-guide being attached at the center 0 its transverse lower part to the said standard and having its said spring arms bent rearwardly over the platen in position to support the said guide-plates above arms constituting guide plates;

the platen at opposite sides of' the printing point.

In testimony, that I claim the foregoing as my invention I affix my signature in resarch THERON L. KNAPP.

Witnesses:

A. J. MULLEN, L. L. SCHRODER.

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