US1175929A - Paper-feeding mechanism for type-writing machines. - Google Patents

Description

E. L. 0. CLARK.

PAPER FEEDING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED APR.12, 1919.

1,17 5,929, Patented Mar. 21, 1916.

INVENTOI? To all whom it may concern:

an sra'rns arana oriuea.

EDWARD L. C. CLARK, 0F -MIDDLETOWN, CONNECTICUT, ASSIGNOB- TO THE HOISELESS TYPEWRITER COMPANY, OF MIDDLETOWN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

PAPEBFFEEDING MECHANISM FOR TYPE-WRITING MACHINES.

Be it known that I, EDWARD L. C. CLARK, a citizen of the United .States, residing at Middletown, in the county of Middlesex and State of Connecticut, have invented certain new and useful Improvements in Pa.- per-Feeding Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to typewriting machines, and with regard to the more specific features thereof, to paper holding an feeding means for guiding'thematerial on which the writing is to be done.

Among the objects of the present invention are to provide simple and practical mechanism for accurately feeding and guiding the paper in its movement about the platen roller; to provide a device for the above purpose having few parts which will be cheap to manufacture and easy to assemble; to provide improved. mechanism forfeeding the. paper about the platen-roller and removing any intermediate bulge therein; and to provide a device which will feed the paper 111" the above manner and automatically maintain its efficiency by accom modating itself to the wear of the parts.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the aplication of which will be indicatedjin the 'ollowing claims.

In the accompanying drawing, wherein is shown one of various possible embodiments of my invention, Figure 1 is a front elevation of a part of the platen-carriage of a typewriting machine, sufficient to illustrate the application of the present invention thereto; Fig. 2 is a sectional view on the line w-w of Fig. 1; Fig. 3 is a detail view of the paper-holding de\ice; and Fig. 4. is a detail View, partly in section, of paperfeeding rollers. Fig. 5 is a detailed perspective view showing a portion of .the paper holding device.

Specification of Letters Patent.

Mechanism for Type-Writmga body vertical and rotary movement to the projection 8 to accommodate itself to Similar reference characters refer to similar parts throughout the several views.

Referring now 'to the drawing in detail, 1 represents the end plates of a typewriter carr age in which is mounted a platen-roller 2 and between which, bearing against the platen-roller, is a flat platen'3 agalnst which the printing is effected. At'ea'ch end of-the platen-roller are mounted arms 4: preferably pivoted upon the axis thereof, as shown by dotted lines in Fig. 2. These arms 4 support a bar 5, which may be scaled through out its length as shown in Fig. 5, if so desired, along which paper-holding means or clips, similar in size and shape, except for i being right and left, are adapted to slide for different widths of paper. These paperholding means comprise a block 7, so formed as partially to surround the rail 5, as shown in Fig. 2, and'carrying at the forward part screw '9 for holding a T-shaped paper-feed ing roller support 10 in engagement therewith. This paper-roller support consists of ortion provided with a slot.11

Patented Mar. 2t, 1916.

Application filed April 12, 1910. Serial No. 554,954.

therein, t irough which the screw9 is adapted to pass whereby the same may have a any unevenness of the paper or varying numbers of sheets thereof. The ends of the body portion 10 are turned down, forming an axle 11 upon which a sleeve 12, having upwardly turned flanges at either end therewith respect of with a roller 13 therebetween, may rotate. 'Thisroller is preferably of soft rubber, for well-known reasons.

The sleeve-portion 12 is preferably narrower than the turned down portion 11', thereby insuring a free and unrestricted rotary movement; a washer 14 is held in place by the swaged-over end 15 on the body portion 10. A roller 16 at the opposite end of the body ortion is similarly mounted and is of a iameter slightly larger than the roller 13, the peripheries of both rollers being inclined to-lie in the same conical surface, and the common axis of the being inclined to the writing line, for reasons that will be hereinafter more fully described. These rollers 13 and 16 engage the paper on the platen-roller 2 through a suitableopening 17 in the paper-holdlng clip, shown more clearly in Fig. '3. This clip is provided with downwardly and laterally extending arms 19 and 20, respectively, adapted to engage the flat platen 3 and the platen-roller 2, the downwardly extending arm 19 passing over the flat platen and sufliciently below it to catch the paper and guide it over the platen when delivered from between the platen-roller and paper-trough 21, see Fig. 2. The opposite end of the clip is bent upward at substantially right angles to the body portion at 22 and rigidly secured to the block 7 by means of a screw 23. Intermediate the turned-up portion 22 and the block 7 is clamped one end of aflat spring-member 24:, forked at its other end, engaging a headed lug 25 on the lower part of the body portion 10 of the roll-carrier, shown in Fig. 4, thereby holding the rollers in yielding engagement with the platen-roller to permit a varying number of sheets to be fed between the co-acting rollers.

The axes of the roller devices carried by each clip lie in a radial plane passing through the center of the platen-roller 2,

so that if the rollers were free to rotate over the surface of the paper, they would describe a curved line toward some fixed center, but,- slnce the rollers are held against relative movement toward such a center I fed past the the side edges of the paper tend'to move laterally in opposite directions under the action of both rollers, thus stretching the paper and preventing any intermediate irregularity or bulge therein as the same is printing point on the hat platen. By using two inde endent rollers on each paper-clip, instead 0 a single frustoconical roller, the slight slipping tending to wear the larger end of such roller faster than the smaller end is avoided, thus eliminating to a large extent the unequal wear which would eventually cause the paper to feed in a more or. less crooked direction if a single roller were used. It is thus seen that the device automatically accommodates itself to the wearing of these parts.

The operation of this device is substantially as follows: The paper is fed downward over the platen-table, beneath the platen-roller, and as it is delivered from the trough 21, it is caught by the arms 19 and carried over the flat platen 3 and upward into engagement with the paper-rollers. These paper-rollers,,being unable to rotate toward a fixed center, as would be their natural tendency if free to move, react on the paper to force the edges thereof outwrinkling of the ward, thus tending to prevent buckling and paper at the printing point.

Q 'If a large number of sheets should be passed between the'clips and the platen-roller, the

said platen roller,

clips would yield, being preferably constructed of more or less resilient sheet metal, and the paper-rollers would move upward against the action of the spring 24, as permitted by the slot of the roller-holder. Should it be desired to erase an impression on the original and carbons, the pivoted arms 4 carrying the paperfeeding device are moved forward into the position shown in dotted lines in Fig. 2, allowing the operator to use theupper part of the platen-roller as an erasing table.

It is thus seen that this invention provides .a very simple and practical device having few parts, which will be cheap to manufacture and easy to assemble, and accomplishing, among others, the objects and advantages above set forth.

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 11 in the body-portion the scope thereof, it is intended that all mata ter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having described my invention, what I claim'as new and desire to secure by Letters Patent is 1. In paper feeding mechanism for typewriting machines, in combination, a platen roller, and a plurality of independently rotatable feed rollers spring-pressed thereagainst, said feed rollers having unequal diameters and having their axes inclined to a plane passing through the axis of said platen roller. I Y

2. In paper feeding mechanism for typewriting machines, in combination, a relatively large platen roller supports adjustable longitudinally of and a plurality of relatively small feed rollers carried by each of said supports, the feed rollers of each of said supports being independently rotatable and of unequal diameters and having alined I axes inclined with respect to a printing point between said supports.

3. In paper feeding mechanism for typewriting machines, in combination, a relatively largeplaten roller, a plurality of feed roller supports adjustable longitudinally of a block mounted on said ar and adjustable a supporting bar,

' comprising a along it, a paper feeding roller, and a support for the'roller loosely mounted on the block and permitting a vertical and a rotary movement between the block and the support.

5. A paper clip for typewriting machines, body portion of stamped'sheet metal, a block to which said clip is secured, a plurality of rollers carried by the block, and means permitting the rollers to move bodily relatively to the block, one of the rollers being of larger diameter than the other.

6. A paper clip for typewriting machines, comprising a block, and a roller support carried thereby having a loose connection therewith permitting relative rotary and vertical movements of the roller support with respect to the block.

7. A paper clip for tyipewriting' machines, comprising a block, a -shaped roller support having a and a spring interposed between said block and roller support for holding said roller support in normal position.

8. A paper clip for typewriting machines, comprising a block, a T-shaped roller support having a loose connection'with the block, rollers carried on two arms of the roller support, and a spring between the third arm and the block for holding the loose connection therewith,

- in the presence rollers in normal position .with respect to said block. 9. In a paper-holding device, a body portion, a block to which the body portion is secured, roller-carrying means loosely mounted on the block, and a mounted rollers of different sizes on said roller-carrying means.

10. In a paper-holding device, a body portion, a block to which said body portion is secured, roller-carrying means loosely mounted on the block, a plurality of separately IIfOllIltGd rollers on the roller-carrying means, and means whereby the roller-carrying means may have rotary and vertical move ment relative to the block. a

11. In a paper-holding device, a body portion, a block to which the body portion is secured, roller-carrying means loosely mounted on the block, a plurality of separately mounted rollers, means whereby said roller-carrying means may have a rotaryand vertical movement relative to the block, and spring means for holding the rollers in normal position.

In testimony whereof I aiiix my signature,

of two witnesses. EDWARD L. C. CLARK.

Witnesses:

NrLs H. ANDERsoN,

MARY K NEFICK.

plurality of separately

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