US1841116A - Typewriter paper feed mechanism - Google Patents

Description

Jan. 12, 1932. GARBELL 15841,].16

TYPEWRITER PAPER FEED MECHANISM Filed March 20. 1929 2 Sheets-Shout l .JZJ//ZZE flax GARBELL.

Jan. 12, 1932. GARBELL 1,841,116

TYPEWRITER PAPER FEED MECHANISM FilGd March 20, 1929 2 Sheets-Sheet 2- H a" Q Patented Jan. 12, 1932 UNITED STATES PATENT OFFICE MAX GARBELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO VICTOR ADDING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLHOIB TYIEWRITER PAPER FEED MECHANISM Application filed March 20, 1929, Serial No. 348,415.

My invention relates to new and useful improvements in paper feed mechamsmsand particularly to the paper feed mechanisms used on typewriters. The form of paper feed mechanism heretofore used is complisated and expensive to make. My improved form results 'in increased efliciency and greater economy in manufacture. My inventlon will be more fully explained by reference to the accompanying drawings, wherein:

Figure 1 is a sectional, side elevatlonal, view of the feed mechanism and of that part of the typewriter to which it pertains;

Fig. 2 is an enlarged side e evational view )f the feed mechanism;

Fig. 3 is a perspective view of the feed nechanism;

Fig. 4 is a detailed view of the carriage rail Fig. 5 is a top plan view of a portion of ;he feed mechanism as it appears mounted .n connection with the platen and feed rolls )f a typewriter; and

Fig. 6 is a side elevational view of the teed mechanism, feed rolls, and platen.

Referring now more particularly to the lrawings, feed rolls 10 and 11 are shown )iased against a platen 12 by a sprmg 13 which actuates bracket arms 14 and 15. Bracket arm 14 is pivoted on the flange 16 of ;he carriage rail 18, while bracket arm 15 s )ivoted on the flange 17 of said carriage ra1l L8. The flanges 16 and 17 of the carriage an 18 travel along a raceway comprising ixed rails 19 and 20 attached to the carriage ruck 21. The balls 22 and 23 separate the ixed rails 19 and 20 from the flanges 16 and .7 of the carriage rail 18. Separators 24 md 25 position the balls 22 and 23 longitudirally of the carriage rail. rock shaft 26 s attached to a cam 27, said cam having a flat 58 which engages the lower arms 29 and 30 if the bracket arms 14: and 15 when the rock haft 26 is moved to depress the portions 29 .nd 30 of the bracket arms 14 and 15, therey releasing the feed rolls lO-and 11 from ontact with the platen 12.

The carriage rail 18 is formed of a single iece of steel, the portion 31 thereof depending at right angles therefrom and forming a bearing or the rock shaft 26.

Indentations 32 and 33 in the bracket arms 14 and 15 determine the point where said bracket arms are pivoted on the flanges 16 and 17 of the carriage rail 18. The carriage rail 18 is cut back at points 34 and 35 so as to permit unimpeded downward motion of the bracket arms when the cam 27 is in its engaged position.

The spring 13 is attached to flanges 36 and 37 respectively of the bracket arms 14 and 15 and these flanges are located between the point of contact of the feed rolls 10 and 11 with the platen 12 and the point of contact of the flanges 16 and 17 with the indentations 32 and 33 in the bracket arms 14 and 15. This spring 13 is only slightly displaced from a vertical plane passing through the points where the bracket arms are pivoted on the flanges of the carriage rail.

A lever 37 actuates the rock shaft 26 to thereby move the cam 27 to force the rolls away from the paper around the platen. Apertures 40 in the paper apron 39 permit the feed rolls 10 and 11 to engage with the platen 12.

My copending applications, Serial Nos. 239,015 and 239,821 illustrate a typewriting machine in which the above described paper feed roll mechanism may be advantageously employed.

When paper is to be fed into the typewriter, it is inserted between the paper apron 39 and the platen 12, the feed rolls 10 and 11 being then spaced away. hen it is desired to release the pressure of the feed rolls in order to adjust the position of the paper, said feed rolls are moved away from the platen by pushing the lever 37 toward said platen thereby causing the flat of the cam 27 to depress the lower arms 29 and 30 of the bracket arms 14 and 15, and to hold said bracket arms in said depressed position, said bracket arms being pivoted on the carriage rails 16 and 17 so that the feed rolls 10 and 11 are in spaced relation from the platen 12. lVhen it is desired again to restore tension of the feed rolls 10 and 11 against the platen 12, the lever 37 is moved backwardly from the platen so that the flat of the cam 27 is disenged from the lower arms 29 and 30 of the Efackets 14 and 15.

One object of'my invention is to reduce the number of parts in t ewriter paper feed mechanisms thereby ac loving simplicity and economy. Another object of my invention is to simplify the superstructure of said feeding mechanisms and to insure that there'are no exposed parts in which material may become caught or entangled.

As will be observed from the above description of my invention, the actuating means for moving said feed rolls away from the platen are seated or contained between the two carriage rails. The cam 27 contacts with the lower portions of the roll-carrying which brackets or arms 14 and 15 in said rail enclosed space so that the possibility of nono ration of the said roll disengaged means tlifough the intervention of foreign material is eliminated.

Moreover, the above described feed roll .control mechanism is very simple in operation and comprises a 11111111111111]. number of without bolts or other securing means. In

connection with this elimination of superfluous parts, attention is specifically directed to the manner in which the rock shaft 26 isjournaled in the'portions 31 dependin from the rail 18, as well as the way in which the brackets are pivotally secured to the upper carriage rail. 7

While I have described but a single embodiment of my invention, it will be apparent to those skilled in the art thatthere may be many modifications therein without de-. 'parting from the spirit and cope of this invention, and I desire therefo e, that the same 1 be limited only by the scope of the appended claims and the prior art.

Iclaim: 1. In a paper feeding device, a platen, a

supportingstructure therefor, feed rolls co--, operative with said platen, bracket arms sup'-' orting said feed rolls, fulcrums for said racket arms constituted by .the edges of a slot in said supporting structure, and tension means common to said bracket arms, said tension means biasing said feed rolls against said platen and biasing said bracket arms against said fulcrums.

- rail, and means for urging said arms are so arranged that they may be" mounted in operative relation to the rails the respective en ported b said truck above the same and i1 spaced re ation thereto,journal means forme inte ally with said carriage rail and de pen ing therefrom into the space betweei said truckand rail, and a paper-feed-rol release shaft located in said space and jour naled in said journal means.

4. A carria e rail having an aperturl therein with e ges adapted to constitute ful crums for paper-feed-roll supporting brack ets and comprising an integral portio1 adapted to constitute a journal for a paper feed-roll release shaft and formed by mate rial struck out in part from said aperture 5 In a device for feeding paper around typewriter platen, a carria e rail supporting said platen, paper-feed-rol s, arms on whic] saidrolls are supported, said arms being piv otally mounted on the edges of a slot in sail ams the pivots constituted by the edges 0 sail s 0t.

6. A paper-feed roll bracket'comprising 1 substantially horizontally extendin portion a roll-supporting arm extending Irom on end of said first-mentioned portion, a spring attaching lug at said end of said first mentioned portion, spaced projecting por tions at the other end of said first-mentione4 portion to form a notch for pivotally sup porting the bracket, a portion dependin; from said other end of said first-mentione portion, and a cam-en a ing portion extend ing substantially par le to and in the direc tion of said first-mentioned portion from th bottom of said dependin portion.

7. In a typewriter or t e like, in combina tion, a movable carriage rail having a slo extending transversely, thereof a pair 0 paper -feed-roll supporting brac ets' extend ing through said slotal'i'd each having a note] formed in an ed ethereof to bear agains of said slot, aspring co acting between said brackets and pressing the notched portions thereof against the ends of said slot whereby said ends constitute fulcrums for said brackets, and a cam for i movin said brackets apart against the force of sai spring, said brackets having juxtaposed portions engageable by said cam.

In witness whereof, I have hereunto sub scribed my name. MAX GARBELL.

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