US628454A - Paper-feeding mechanism for type-writers or the like. - Google Patents

Description

No. 628,454. Patented July ll; I899. H. DURUZ.

PAPER FEEDING MECHANISM FOR TYPE WRITERS OR THE LIKE.

Application filed Feb. 8, 1B99.|

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No. 628,454. Patented July II, I899.

' H. DURUZ. PAPER FEEDING MECHANISM FOR TYPE WRITERS OR THE LIKE.

(Application filed 'Feb. 8, 1899.)

3 Sheets-SheeI 2.

(N0 Model.)

No. 628,454. Patented July 11, m9. H. nunuz.

PAPER FEEDING MEGHANISM,FUR TYPE WRITERS OR THE LIKE.

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UNITED STATES PATENT OFFICE.

HENRI DURUZ,YOF LAusANNE, SWITZERLAND.

PAPER-FEEDING MECHANISM FOR TYPE-WRITERS OR THl E LIKE.

SPECIFICATION forming part of Letters Patent No. 628,454, dated uly 11, 1899. I

Application filed February 8, 1899.' Serial No. 704,948. (No model.)

To all whom it may concern; I

'Be it known that I, HENRI DURUZ, a citizen ofi Switzerland, residing at Lausan n e, Switzerland, have invented certain new and useful Improvements in Paper-Feeding Mechanisms for Type-Writers or the Like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in paper-feeding mechanisms for. type-writing and other similar machines.

In the type-writing machines as hitherto employed the feed of the paper into the carriage at right angles to the path of the latter has been efiected by feed-rollersbearing' against each other and between which the paper sheet is clamped, the paper being fed forward by friction. Such an arrangement is'open to objection, for the reason that it is very diflicult to make the pressure of the con:

tacting feed-rollers even throughout their entire length. Moreover, in the course of use the surface of one or theother of the rollers will become worn or injured to such an extent that the contacting takes place onlyat a few points, in consequence of which the.

surfaces of the rollers are apt-to slip moreor less on the paper, resulting in an oblique or diagonal feed. To overcome this objection, the paper or platen -rollerthat is, the roller against which the type are pressed-has been provided with a paper-clamp in some formsv of type-writing machines. This arrangement, while it effects a positive advance or feed of the paper on turning the platen or paperroller, is open to the objection that the paper is wound upon the roller, so that the said roller is made thicker in diameter at each rotation of the same, whereby the space between the lines is increased as the work proceeds. A further objection in this arrangement lies in the fact that the work or manuscript is concealed as the paper is Wound on the roller.

It is theobject of the-present invention to remedy these objections, andfor this purpose a device embodying the said invention involves the provision of a clamp in which the paperis to be held, said clamp being guided parallel to the axis ofthe platen or paperroller and .away from the said paper-roller,

whereby there is effected, first, a uniform and always parallel feed of thepaper over the platen on proceeding from line to line, and, secondly, the paper as it is written or printed upon is spread out before the operator in such away that the work is always visible.

In the accompanying drawings I have represented what I consider the preferable embodiment of my invention.

In the drawings, Figure 1 represents a trans verse section through the paper-carriage and adjacent parts; Fig. 2, a sectional plan, the section being taken through the left-hand end of the carriage on the line 2 2, Fig. 1; Fig. 3, an end elevation looking toward the left cheek or bracket of the carriage; Fig. 4, a plan view of the same; Fig. 5, an elevation of the rear portion of the right-hand check of, the carriage; Fig; 6, a plan view of the same, and Fig. 7 a front elevation of the paperclamp. Fig. 8 is a front elevation of a modified form of paper-feed embodying my invention; Fig. 9, a vertical cross-section, and Fig. 10 a plan view of the same.

. As shown in the drawings, the paper-carriage consists of a supporting]- frame a and the cheek-pieces a a whose forward ends are provided with hearings to receive the journals 1) of the platen or paper rollb. The

:forward end of the frame a is provided with a sleeve a which embraces the carriage-rod V d, mounted upon the machine-frame, the two parts thus serving as a guide for the carriage. The frame a is, moreover, provided at an intermediate portion of its length with a roll or caster e, which travels upon a guide-rail f, also mounted on the main machine-frame.

The rear ends of the cheek-pieces a a are provided with eyes a, which receive the axle a on which are mounted a series of frames or arms a a a a". noted from an inspection of Fig. 1, occupy v different altitudes when in their positions of rest, the frame or arm a? being uppermost, while the lastframe a occupies the lowermost position. The uppermost frame a is provided with an upward extension o to which the clamp a is pivoted, so thatiits forward end is yieldingly pressed against the forward end of the said arm a, the handle a being formed on the clamp-jaw a to allow the same to be releasedwhendcsirech' The- These arms, itwill be yieldingly-pressed jaw a 'of the paper-clamp so formed may be held in its operative position by any suitable or desired means, in the present case by a spring a which is wound around a pivot 0. of the clamp, its upwardextending ends a a sbearin g against the extension a and handle a This U-shaped spring serves to effectually and yieldingl-y clamp the paper between the forward end of the arm or frame a and the jaw a The forward end of the lowermost frame a in its normal position rests upon the studs a of the cheeks a a The frames a a a are mounted loosely upon the axle a while the'frame a is keyed to the said axle.

Each arm of the'frames a is provided at its rear portion near the hub with three studs a a a The uppermost of these studs are only long enough to engage the rear portions of the arms of the frame a, whereby they may raise the latter after the frame a has been raised a predetermined angle or elevation. The studs a are longer than the studs a and are adapted to reach below the rear portions of the arms of the frame a butnot long enoughto reach under the arms of the frame a The studs a finally, are of suflicient length to extend below the rear portion of the arms of the frame a so that when the axle or shaft a is turned it serves, first, to raise the frame a and then, through the medium of the latter, the arms a a a in succession, so that the same will be spread out fan shape, as indicated in dotted lines in Fig. 1.

.The sheet of paper to be written or printed upon is pushed beneath the platen-roller d from the rear of the machine and is then drawn forward and inserted beneath the clamp-jaw a, which has been previously raised. 'On releasing the clamp-jaw a the paper will be held in operative position, and it isthenceforth compelled to follow the motion of the clamp-jaw a and to lie upon the ends of the arms a a a a as they are gradually spread out into the shape of a fan. It thereby assumes an approximately cylindrical form, so that the feed or elevation of the paper corresponds to the angular motion of the frame a The step-by-step rotation of the shaft or axle a for the line-spacing after the completion of a line of manuscript is carried out by the following mechanism: The ratchet-wheel a is keyed or otherwise fixed to the lefthand end of the said axle a A pawl-lever a is mounted so that its end loosely encircles the hub of the ratchet-wheel a and the said pawl-lever carries a dog or pawl a adapted to engage the teeth of the ratchet-wheel a in the usual manner. The lever a is constantly urged against a fixed stud a on the cheekpieces a by means of a spiral spring a one of whose ends is secured to the cheek-piece a and the other to the lever a (See Fig. 2.)

In order to feed the paper a distance of one line, the lever a is raised until its forward free end strikes against the adjustable stoppin a This stop-pin in the present case is shown to consist of a screw-stud which is adapted to be screwed to a greater or less extent into or out of a bracket fixed on the cheek-piece, whereby the line-spacing may be adjusted to any desired width.

In order to prevent the frames a a a a from dropping back to their original positions (indicated in full lines in Fig. l) by virtue of their own weight, the right-hand end of the axle a is provided with a'second ratchetwheel a Fig. 5, adapted to be engaged by a pawl or dog a pivoted or mounted on the check a in any desired or suit-able manner, whereby the return rotation of the ratchetwheel a and of the axle a is prevented.

In order to return the frames at a a a to their original positions, (indicated in'full lines in Fig. 1,) the pawl a is first thrown back, whereupon the handle a' is grasped with one hand and the pawl a is also thrown out of engagement with the ratchet-wheel a by the other hand, whereupon the frame a is slowly let down until the frame a rests against the pins or studs a.

The axle a is arranged at such a distance behind the platen-roller b that the necessary feed of the paper may be accomplished when the frame has moved through an angle of about ninety degrees or less. When the frames a a a a oce'upythe position indicated in dotted lines in Fig. '1, the resultant of the forces of gravitation acting upon these frames will always lie between the axle a and the platen-roller Z), so that there is no danger of the frames falling to the rear of the axle a The number of auxiliary frames a a a is governed by the desired length of paper to be printed on, these frames being for the purpose of spreading out the paper in an approximately cylindrical surface. It is desirable that the front edges of these frames, which are to form the support of the paper, be so near each other that their surfaces will not deviate considerably from that of a cylinder.

Below the platen-roller I) there is arranged a second roller 6 whose journals are mounted in movable brasses or journal-bearings N, which are guided in the slots 19 in the cheekpieces a a Springs 1) press the brasses b and with them the roller b ,toward' the platenrollerb,so that the paper is yieldingly clamped between theplaten-roller b and the roller By cooperation of this latter device and the clamp a the paper is stretched sufficiently to cause the same to lie snugly against the platen-roller b at the point of the same against which the type. are forced or struck.

In the modification illustrated in Figs. 8, 9, and 10 the paper-clamp a is pivoted to a carriage s, which is guided in the parallel and vertical guide-slots s. The carriage is provided at its rear side with a rack 3 which is engaged by a pinion 3 The pinion 3 is key ed or otherwise fixed to the shaft 8 which shaft is provided at one end with a ratchet- ICC wheel 3 Upon the hub of this ratchet-wheel is loosely mounted a pawl-lever .9 which carries a pawl or dog 3 adapted to engage the teeth of the ratchet-wheel s. A helical spring 3 tends to press the lever s constantly against the stop-pins 8 In order to secure the carriage in any position to which it has been moved, the free end of the axle s is provided with a ratchetwheel 8, keyed thereto and adapted to be engagedby the pawl 3 The operation of this modified device is obvious from' the foregoing. Whenever the line has been completed, the lever s is drawn away from the stud .9 By this means the pawl s is caused to feed forward the ratchet-wheel s, which through the medium ofthe pinion s engaging the rack 3 causes the carriage to be raised sufficiently to place another portion of the paper in the position to be printed upon, the amount of line-spacing thus produced being governed by the adjustable stop-pin, as in the form of device shown in Fig. 1. l

Having thus fully described myinvent ion,

what I claim as new, and desire to secure by Letters Patent, is I 1. In a type-writing machine, the combination-with a positive holding device arranged to hold continuously one part of the paper, of means for maintaining a yielding pressure upon a part of the paper in the rear of the positive holding device, and means for movs ing the positive holding device in the direction the paper is to be fed. 1

2. In a type-writing machine, the combination with yielding means for continuously maintaining a pressure on one part of the paper, of a clamp device arranged in advance of the said yielding means and arranged to hold another part of the paper positively and continuously, and intermittingly acting means for moving the clamp deviceaway from the yielding means.

In a type-writing machine, the combination, with a yielding paper-holding device, of

paper-holding device carried by one of said paper-stretching frames, substantially as described.

4. In atype-writing machine, the combination, with an impression-cylinder and means for yieldingly pressing the paper against said cylinder, of a plurality of singularly-movable paper-stretching frames, means for lifting the frames one by one away from eachother, and a positive paper-holding device carried by one of said paper-stretching frames.

5. In a type-writing machine, the combination,"with a yielding paper-holding device, of a positively-holding paper-clamping frame pivotally mounted and provided with projecting pins, means for moving said frame about its pivotal point, and intermediate paper-stretching frames engaged and moved by the projecting pins on the paper-clamping frame.

6. In a type-writing machine, the combinamounted thereon, and means for yieldingly 1 holding the paper to said impression-cylinder, of a shaft mounted in the carriage, a paperholding frame fixed to said shaft, a positivelyholding paper-ciam p carried by said frame, a pawl-and-ratchet mechanism for rotating said shaft, means for holding the shaft in anyposition to which it is rotated, a plurality of paper-stretching frames intermediate the paper-holdin g frame and the impression-cylin der, and means carried bythe paper-holding frame for separating the paper-stretching frames one by one.

In testimony whereof I aflix my signature in presence of two witnesses.

' HENRI DURUZ. \Vitnesses:

Ron. DEVENOGE, ADOLF. FEDERER.

.tion, with a carriage, an impression-cylinder

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