US85961A - Improvement in method of attaching rubber to pencils - Google Patents

Description

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JOSEPH RECKENDORFER, OF NEW YORK, N. Y.

Letters Patent No. 85,961, dated January 19, 1869.

To whom it may concern:

and l hereby declare the following to be a full, clear,

and exact description ofthe same. reference being had to the accompanying drawings, in which- Figure lis a section of a pencil with a rubber eraserhead attached, in accordance with my invention.

Figure 2 is a perspective view of the. same, with the rubber head removed from its socket in the pencil.

The object of my invention is to provide a simple, durable, and efficient means for uniting a rubber eraser with the pencil, pen-holder, or other article, to which it may be applied, which will also serve to strengthen and stifi'en the rubber; and

My invention may be stated to consist in securing the eraser-head to the article with which it is to be combined, by means of a central stern of metal, or equivalentw material, Apartly embedded in the rubber head, and projecting therefrom so as to enter a socket formed for its reception in the pencil or other article, as hereinafter described.

When this stem is thus arranged, that part of it within the eraser will constitute a rigid and nnyielding core, to stiien and uphold the rubber, which is thus enabled to resist the pressure to which it is so often subjected, while the projecting portion of the stein, which may be either screw-threaded or plain, when inserted in its socket in the pencil or holder, will hold the eraser securely in place, and will solidly unite it with the holder.

In the drawings, l have represented the eraser, b, as applied to the end of an ordinary pencil, a.

In this case the greater part of the eraser-head is of the same diameter as the pencil, but its lower end, b', is' somewhat smaller, so as to iit in the countersnnk end, a', of the pencil.

Extending centrally through the eraser-head is a metal stem, c, around which the rubber is moulded, so that the twc may be permanently united, the stem being roughened, or corrugated, or having a head, as seen in iig. l, in order to allow the rubber to take rm hold.

The stem projects a suitable distance from the base of the eraser, so that when the pencil and eraser are put together, as in iig. l, the stem will enter and lit tightly in a corresponding socket, d, formed in the pencil below the countersunk end c., L

This construction of the parts causes the eraser to be held most firmly and securely, for not only is it held by the stem a, which also stilfens it, but its contracted end, b', acting as a plug, is inserted and compressed Within the countersunk part a of the pencilend, and thus serves to give it additional strength and stability.

It is obvious, however, that the contracted end b may be dispensed with, the base of the eraser resting directly upon the end ofthe pencil, which, in this case, will be provided with the socket only; and, as represented in lig. 2, the stein may be screw-threaded, so as to screw into its socket, thus preventing all liability of the eraser becoming accidentally detached from its holder.

Another advantage attending the use of the stem c is, that as it is permanently united with the rubber, as above described, the latter cannot possibly slip from it, but the two must always remain together.

I am aware that rubber erasers `have been heretofore united with their holders in various ways, iby making the eraser hollow, so as-to t over the end oi the holder, or by inserting the-rubber in the'end of the holder. But these methods are open to considerable objection, for, in the former case, the eraser must necessarily be greater in diameter than the pencil, so that when the pencil is withdrawn from the pocket, in which it is usually carried, the rubber head will be apt to catch and to draw out with it any papers which may happen to be in the pocket; and, in the latter case, the size of the pencil is increased, rendering it bulky and unsightly, as well as expensive.

My invention obviates all these defects.

As above described, the eraser may be made of the same diameter as the holder. The size of the holder need not be increased, even if the rubbep 'befinserted in its end; and, under all circumstances, whether the rubber be inserted in the end or not, the eraser, by means of the central' stem and core, will be maintained rmly and securely in position, and united solidly with the holder; therefore,

What I claim as my invention, and desire to secure by Letters Fatent, is-

Uniting the rubber eraser with the pencil or other holder to which it is applied, by means of a rigid central stem, whether screw-threaded or plain, embedded in and permanently united with therrubber, and extending into a socket formed for its reception in the holder, substantially as and for the purposes set forth.

In testimony whereof, I have signed my name to this specification, before two subscribing witnesses.

' JOS. REGKENDORFER.

Witnesses: Y

S. BRAIsTED, SAMUEL P. BELL.

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