US1207630A

US1207630A - Paper-feed mechanism.

Info

Publication number: US1207630A
Application number: US3133315A
Authority: US
Inventors: Alvah C Roebuck
Original assignee: WOODSTOCK TYPEWRITER CO
Current assignee: WOODSTOCK TYPEWRITER Co
Priority date: 1915-06-01
Filing date: 1915-06-01
Publication date: 1916-12-05
Anticipated expiration: 1933-12-05

Description

A. c. ROEBUCK.

PAPER FEED MECHANISM. APPLICATION FILEDJUNE1,1915.

Patented Dec. 5, 1916.

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tttll C. ROEBUCK, F WOODSTCK, ILLINUIS, ASSIGNOR TO WOODSTOCK TYPEWRITER CMPANY, OF WOODSTQCK, ILLTNOIS, A CORPOBATION'OF ILLTNOIS.

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Specication of Letters Patent.

The principal object of the invention is l to provide an improved construction, combination and arrangement' of parts for holding, feeding land adjusting the paper with respect to, the platen.

@ther objects' will appear hereinafter.

Tn the fdravi-ngs, Figure 1 is a front ele- -vation of a portion of` a typewriter platen and the parts appertaining to this invention, and Fig. 2 is a sectional View of part of the mechanism shown by Fig. 1.

Tn a typewriter the paper apron which extends under the platen is pressed yieldingly against the platen for the purpose of holding the paper in position with respect to the platen. Means is also provided for withdrawing the apron from the platen'and for permitting the apron to move yieldingly away from the platen to accommodate various thicknesses of paper.- In the present construction a platen 1 is rotatably mounted in end plates 2 of a typewriter' sub-'carriage which are held together by bars 3, 4 and 5. A rotatable bar 6 is .also mounted in the end. plates 2, and pivoted on one' of the end plates is an operating lever 7 which is connected to the bar 6' for oscillating it by means of a link 8 and an arm 9 secured tothe bar 6.

Apaper apron 10 isbent to substantially conform to the curvature of the platen and has depending ears 11 at the rear in which a shaft 12 ismounted, and depending ears 13 at the forward end in which a shaft14 is mounted. Mounted .upon these shafts are paper feeding rollers being suitably spaced apart as by means of vsleeves 17. lintermediate the ears 11 and 13 are depending ears 18 each of 'which is formed 'with a slotted perforation, and connected to the 'rotatablebar 6 are arms 19 Which'are each loosely 'secured to one of the ears 18 by means of a fastening device 20. Pivotally mounted on the front shaft 14 is a plate 21 which is pressed yieldingly against the platen by means of a coil spring 22 at each end vof and surrounding the shaft 14. This plate may be provided with graduations, as shown in Fig. 1, for determining the length and position of the printing line.

Secured to the .frame bar 4 is an abutment 22 through which an adjustable screw 23 is threaded with a projection 24 at its inner end about -which a loop 25 of a spring 26 is passed fdr holding the spring in position. This spring 26 is also wound about the bar 6 and has another bent extremity 27 whichbears directly against the paper apron 10 adjacent the ear 18 at eachend of the apron, the extremity being bent/aroundv the ear.

A paper table 28 is pivoted in the end plates 2 at the rear of the platen and bears normallyyagainst one of 'the frame bars 3 so that it forms an extension and guide for directingthe paper between the paper apron and the platen. The paper apron is formed With openings through which

4the rollers

15 and 16 extend so that'when paper is inserted between the apron and the platen it is engaged by the rollers and the apron is forced away from the platen against the tension of the spring 26. With the spring bearing against the apron intermediate of the rollers and- 16 it is obvious that the spring 26 will press either the front or back rollers'separately against the platen or will press them both against the platen through 'the apron itself, and the plate .21`whioh is pivoted on the front shaft 14 will be pressed by its spring in the direction of the platen regardless of the position of the front or rear ofthe apron,ithus assisting in holding the bottom edge of the paper against the platen when it is desired toprint a line adjacent the bottom of the sheet.

The construction is very simple, inexpensive, and unlikely to get out of order. The tension of each spring may be easily varied, and the extremity of the spring which bears directly against the apron may be easily bent to change the point off actual contact with the apron, thus varying the point of application either to the front or rear of the point`- shown in Fig. 2. Tn this way the pressure of the front and rear rollers may easily be varied.

What T claim is:

1. In a typewriter, a platen, a paper apron Patented weckt, 1916. l

"extending thereunder, a movable support for the apron comprising a rock shaft and arms on the' shaft. loosely connected with the apron, a iixed abutment, and a spring having one end supported by the abutment andthe other end bearing directly upon the apron to press it toward the platen.

` 3. In a typewriter,`a platen, a paper apron extending thereunder, a* movable support for the apron comprising a rock shaft and arms secured to the rock shaft having a loose connection with the apron, an abutment adjacent'each end of theapron, and a spring having one end supported by the abutment' and the other bearing directly against the under side of the apron.

4. In a typewriter, aplaten, a paper apron extending thereunder, a movable support for the apron comprising a rock shaft and arms secured thereto loosely connected withv the apron, an abutment adjacent each end of the, apron, an adjusting screw threaded in the abutment, and springs one at each end of the apron having one `looped end in engagement with the adjusting screw and the other end bearing against the paper apron. ,a a

5. In a typewriter, a platen, a paper apron extending theremder, a support for the apron comprising a rockshaft, arms secured to the rock shaft having va loose' connection with the paper apron adjacent the ends, a fixed abutment and adjacent each end ,of the paper apron, yan adjusting screw threaded in the abutment, a spring wound about the shaft at each lend having one extremity engaged by theadjusting screw in the abutment and having the other end extending along one of the saidarms and bearing directly upon the under side of the apron, a pivoted lin er lever, and a link connecting the finger ever to .oscillate the. rock shaft whereby the apron maybe moved yieldingly away from the-platen against the tension of the said spring when the loose connection is taken `up. j j

G. ,Paper feeding mechanism comprising a platen, a paperl apron extending there- I 'under' having ears bent downwardly at the front, rear and at an intermediate point at both-,ends of the apron, front and rear paper feedl rollers mounted' respectively in the front and rear-dependingl'ears andadapted to bear against the platen, means tosloosely engage the interme iate ears of the apron to move it bodily away from the platen, and a single spring adjacent each end of the apron bearing directly upon the under side of the apron at a" point adjacent the intermediate ears tending to press the entire apron in contact with the platen.

7. Paper feeding mechanism comprising a platen, a paper apron extending thereunf der having ears bent downwardly at the front, rear and at an intermediate oint adjacent the ends of the apron and with openings through the apron in line with the front and rear ears, a shaft mounted in the rear ears, feed rollers mounted on the shaft, another shaft mounted in the front ears, feed rollers mounted thereon and spaced apart, a spring-pressed plate mounted on the front shaft the upper edge of which bears against the platen, means for moving the apron bodily toward and from the platen comprising a rock shaft, arms secured thereto havlng a loose connection with the intermediate depending ears of the apron, a lever, means connecting the lever to rock the shaft, an abutment xed adjacent each end of-the apron, an adjusting vscrew threaded in each abutment, and a the platen, a movable support for the apron having a loose connection with it intermediate the front and rear, and a spring having a bendable end to engage the under side of the apron and press it toward the platen, the end being bendable to vary the point of application intermediate the front and rear thereby varying the pressure on the front and rear paper rolls.

9. In a typewriter, a platen, a paper apron extending thereunder, means loosely connected to each end of the apron for withdrawing it from the apron, a fixed abutment below the apron, and a spring extending between the abutment and the apron tending to press it against the platen.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 28th day of May, A. D. 1915.

ALVAH C. ROEBUCK.

IVitnesses L. E. HoUsHoLDER, G. AUSTIN.