US1418506A - Typewriting machine - Google Patents

Description

ALFRED .1. wool), or

.wnrrnn. commnr, or

To all whom it may concern;

Be it known that I, ALFRso'J. Wooma citizen of the 'United States, residing in \Valdwick, in he county of Bergen and 1 State of New Jersey, have invented certain Improvements in Typewritnew and useful ing Machines, of which the following is a specification. I

- 'imbedded in This invention relates to means for feeding'a bill-sheet or work-sheet relatively to a record-sheet, which may be a tally-strip. It is frequently the case in machines comprising such means that the work-sheet is fed around the platen at a different rate than the tally-strip, for it is desirable that the items on the work-sheet be double or triplev spaced, whereas the items on the recordsheet or the tally-strip should generally be condensed by single-spacing.

The ordinary pressure. rolls press so strongly against the platen that if a worksheet is rapidly withdrawn from the-machine, the tally-strip is apt to be dragged with it, even in caseswhere rolls do not act in the patent to Hart, 1,281,160,-dated October 8, 1918. This invention contemplates the removal of the usual pressure rolls and the pressure annular inserts of soft rubber, the hard rubber platen surface and flush therewith; By the use of rolls 'pressing against'such inserts, a more effective grip or bite isprovided than is obtaine by the pressure f rolls against the usual hard rubber surface. sure would have against the-soft inserts to obtain an effective grip, and thus the dragging action on the tally-strip described above may be'repress against Much less presj duced.

The rolls-which co-operate with the soft ing range ofthe platen and since the bill-sheet is fed independently of said strip, the rolls must be positioned outside the limits of the strip, printing field, and near the ends of the platen.

The Hart patent illustrates an underlying tally-strip which is much narrower thantheprint-in field of the platen. The feed-rolls shown in the Hart patent press broad marwork-sheet may directly on the tally-strip, as platen. In saidHart patent, the feed-rolls to be applied to the rolls mounted at the front 1 It is an object of this invention to utilize substantially the full print-- for the tally-strip,

or beyond the A CORPORATION 01 DELAWARE.

narrow margins on the bill-sheet that are.

serviceable to be pressed against the platen, for controlling the feed of the bill-sheet. Thedifficulty therefore arise'sof holding the bill-sheet against the platen under suchcircumstances. This 'difliculty'is overcome by feeding the work-sheet solely by theuse of small pressure-rolls at the ends of the platen to press the overlying bill-sheet against the inlaid soft rubber rings. This device successfully controls a wide work-sheet by means of thereof. Said rubber rings do not bulge from the surface of the platen, so that the lie snugly against the row margins of wide bill-sheets, said sheets are found to bulge out from the platen above said rolls to a serious extent; but the desired result can be obtained and the bill-sheets controlled successfully by the narrow margins thereof, and bulging at the. printing point can be prevented by the use ,of the -described small side rolls at points just. above the printing line on the platen,

The present invention is shown asapplied to an Underwood tally-stri machine as described in said patent to art; butit is un-- derstood that the'devicecan be applied to other machines where relative shifting of sheets of varying widths is desired.

Other features and advantages will hereinafter' appear.

In the accompanying drawings,

Figure 1 is a When Patented June 6, 1922.

Application filed December 17, 1920. Serial No. 431,324.

only the narrow side margins T front elevation of the invention applied to the machine, only the necessary co-operating parts 'ofthe.machi ne being shown.

' Figure 2is a vertical section of Figuryl, showing, in addition, the tally-strip windingand feeding devices. J a

Figure 3 is a detail view of the platenshowing the modified surface' A platen 1, havingfa hard rubber surface the tally-strip with it.

2, is mounted upon a shaft 3 j ournaled in the end-walls 4: of a frame forming a part of the usual typewriter carriage. The platen may be rotated by finger-wheels 5 Or by the usual ratchetwheel 6, which is engaged by slide 7 provided with a pawl 8, said slide mounted on a shaft which has a gear wheel 14 fixed at its other end. The gear wheel 14 meshes with gear wheel 15 fixed to thewinding pulley which rolls up the used tally strip as it is unwound from feed pulley 16.

Figure 1 shows the relative positioning of work-sheets 21 with respect to tally-strip 22. It will be noted that the usual pressure rolls of the ordinary machine have been completely removed. It will Joe further observed that the tally-strip utilizes practically the full printing range of the platen, and, since no pressure rolls contact therewith, its movement is independent of the rotation of the platen. Outside the limits of the .space occupied by the tally-strip, the

.platen is provided with two grooved portions '23 ,into which are inserted bands or inlays 24 flush with the surface of the platen.

These bands are of soft rubber, or of other material considerably softer and more clinging than the hard rubber surface of the ordinary platen, producing an exceptionally strong gripping action when pressure rolls are applied thereto. 'Much less pressure would have to be applied to these soft inser'ts than to the hard rubber-surface in order to make an effective bite for the feeding of sheets, and thus the bill-sheet can be withdrawn from the machine against this comparatively light pressure without dragging Adapted to co-operate with these soft rubber bands are rolls 25. These rolls may be supported against theplaten in any position I either below (see 25), as in the case of ordinary pressure rolls, orat the front. The latter position, is to be preferred, for, as pointed out above, the'billsheet is practically the width of the platen and is held at its ends. The sheet tends to bulge immediately after passing the rolls, and if the sheet would bulge when it reached the printing point. The rolls are therefore mounted at the front of the platen to obviate this objection. The rolls 25 may be supported against the platen in any suitable manner, but are here shown. as mounted in brackets 26 on downwardly-extending fingers 27, which act as paper guides, said fingers being fixed to rearwardly-extending arms 28 terminating in members 29 journaled on and movable along a rod 30 fixed in the endwalls of the carriage frame. Each member 29 terminates in a U-shaped portion, having a small rod 31 slidable vertically therein and pressed upward by a spring 32 into a groove 33 in the lower portion of rod 30. \Vhen arms 28 are in the position shown in Figure 2, therods 31 engage the groove 33 to hold the rolls in lower or effective position. Upon rotation of the arms 28, the rods 31 disengage the groove and the rolls may be swung upwardly to 'ineflective position. iac'h arm is shown as extending forwardly a distance such that sheets 21 and 22 will not be directed too far rearwiardly before passing to the winding mechanism." From the above description, it is obvious that rolls 25 may be adjusted along the platen, by-sliding members 29 along rod 30 until the rolls are in contact with the soft rubber bands,each roll for its entire length engaging. the rubber band or rim, and not running upon the hard platen at any point. The springs 32 may be made of suflicient tension to secure the necessary bite between the rolls .and the rubber bands. The ordinary pressure "rolls, in order to action, press so heavily against the hard rubber surface of the platen that the withdrawal of the bill-sheet dragsthe tally-strip with it. been removed. In the presentinvention, the pressure of the rolls 25 against the soft rubber bands necessary to produce an effective gripping action need not be so strong, and the Work-sheet may therefore be withdrawn rapidly without'disturbing the positionof the tallystrip.

Variations may be resorted to within the scope of the invention, and portions of the improvementsmay be used without others.

Having thus described my invention, I claim:

1. The combination of a revoluble platen having a comparatively hard printing field and provided outside of said field with soft rubber sheet-feeding bands or inlays flush with the platen, and means to co-operate with said soft rubber inlays to feed sheets around the platen only by meansof narrow ning only upon-the soft rubber.

2. The combination of a revoluble platen These pressure rolls have therefore against such pressure the each of the soft rubber inlays, each .roll runhaving a comparatively hard printing-field and provided outside of said field with soft rubber sheet-feeding bands or inlays flush I with the platen, and means to co-operate with said soft rubber inlays to feed sheets around the platen only by means of narrow side margins on said sheets, said co-operating means consisting only of rolls, one for each of the soft rubber inlays, each roll running only upon the soft rubber, said rolls arranged about at the printing line on the platen, to minimize or prevent bulging of sheets at the printing point.

3. In a typewriting machine comprising a carriage, in combination, a platen-jour- =naled in said carriage and having a comparatively hard surface around which worksheets are adapted to be fed, said platen havingcircumferential grooves near the ends thereof, and a gripping device for feeding said sheets around said platen comprising two elements, one of said elements being of comparatively soft material in said grooves flush with the surface of the platen, and the other of said elements being pressure-rolls supported on said carriage and of a length to be pressed only against said bands, said rolls being the only elements pressing against said platen. i

4. A condensed record typewriting machine comprising a rev-oluble platen and means to control the advance of sheets around said platen independently of each other, said sheets comprising a tally-sheet or strip overlaid by a wider work-sheet, said platen provided near its ends with circum- -ferential soft rubber inlays, and separate feed-rolls to co-operate with said inlays to control said overlying work-sheet by means of its side margins outside of the tally-strip, each feed-roll being of such length as to be confined to its soft rubber inlay; means being included for separately controlling the movement of the tally-strip around the platen.

5. A condensed record typewriting machine comprising a revolubleplaten and means to control the advance of sheets around said platen independently of each other, said sheets comprising a tally-sheet or strip overlaid by a wider work-sheet, said platen provided near its ends with circumflferential soft rubber inlays, and separate feed-rolls to co-operate with said inlays to control said overlying work-sheet, by means of its side margins outside of the tally-strip, each feed-roll being of such length as to be confined to its soft rubber inlay; means being included for separately controlling the movement of the tally-strip around the laten, said rolls being arranged at the ront of the platen near the printing line, to prevent undue bulging of said Work-sheet at the printing point.

, ALFRED J. WOOD. l

Witnesses:

JENNIE P.T'H0RNE, Rosr. GERs'TE N.

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