US2087310A - Eraser for pencil and holding tip therefor - Google Patents

Description

H. B. VAN D ORN 2,087,310 BRASER FOR PENCIL AND nowme TIP THEREFOR Filed Nov. 5, 1956;

INVENTO'R ORNE Patented July 20, 1937 ERASER FOR PENCIL AND HOLDING TIP THEREFOR n Horace B. Van Dorn, Maplewood, N. J., assignor -to. Joseph Dixon Crucible Company, Jersey City, N. J., a corporation. of New Jersey ApplicationNovember 5, 1936, Serial No. 109,205

Claims. (Cl. 120-38) The invention relates to an improvement in "erasers for attachment to pencils and to an improved holding means for securing the eraser on the end of the sheath or ferrule attached to one end of the so.-called lead pencil or on the end of a cylin'lrical cap which may be interchangeably positioned on either end of the pencil.

In the usual form of lead pencil in which the lead or marking material is commonly enclosed sides of the pencil and outwardly beyond the holding device or ferrule so as to provide erasing surfaces of ample size to last throughout the life of the pencil, even when the eraser is put to unusualuse, as by school children. i A further ob-..

ject of the invention is to provide holdliig means for such an eraser as will secure it on the end;

of the pencil so firmly that it cannot be accidentally detached therefrom. To these ends the in a wooden sheath or shaft, which may be either invention consists in the improved eraser attache 10 round or hexagonal, the eraser elementhas taken ment for pencils and holding means therefor many forms, cylindrical, wedge-shaped flat-rechereinafter fully described and particularly tangular, and other forms. The most usual form pointed out in the appended claims. of eraser element in commercial use is a cylin- In the accompanying drawing illustrating the drical piece of rubber, of substantially the same preferred form of the invention, Fig. l is a front 15 diameter as the pencil, enclosedat its inner end elevation of a wooden sheath lead pencil having in a metal ferrule which is fastened on one end of at one end a rectangular-shaped eraser, convex the pencil. This construction sometimes proves on its lateral sl des, permanently secured by unsatisfactory because the eraser is worn down means of an improved ferrule to the end of the to the end of the ferrule before the pencil is pencil; Fig. 2 is a side elcvation'of the pencil 20 used up, and there being no provision for exshown in Fig. 1, but with theeraser element and truding the eraser, the user of the pencil is put ferrule shown in transverse longitudinal section to the inconvenience and annoyance of seeking taken on the line 2-2 of Fig. 1; Fig. 3 is a top eraser means unconnected with the pencil. Acplan of the pencil and eraser shown in Fig. 1;

cordingly, it has been proposed heretofore to proand Fig. 4 is a transverse section taken on the 25 vide lead pencils with an enlarged eraser eleline 4-4 of Fig. 2. ment, either cylindrical or of other shape. Even The pencil to which the improved eraser elewhenacylindrical eraser larger in diameter than ment and holding device therefor is adapted the pencil is provided, it often happens that the to be attached may be of any usual or preferred eraser is worn down to the end of the ferrule form, such as the usual Wooden-sheath pencil 30 before the pencil is used up. Hence there has of hexagonal or round form. The invention is been a demand for pencils provided with erasers also adapted for application to paper-sheath penof sufiiciently large erasing surfaces to last oils, and to the cylindricalmetal protective caps throughout the life of the pencil, even when such 'adapted to be placed on either end of a pencil.

pencils are used by school children. In the drawing is illustrated a wooden-sheath 5 One objection to .some of these former conpencil of hexagonal form 5. 0n the outer end structions providing pencils with enlarged eraser of the pencil body 5 is securely mounted a ferelements is the difliculty of manufacture, and rule the inner cylindrical end 6 of which isfassometimes the difiiculty of holding the eraser eletened vto the reduced cylindrical outer end I 40 ment firmly in position on the end of the pencil. of the .pencil. This inner cylindrical end 6 of 40 In the effort to provide an eraser element of the ferrule may be of conventional design. The suflicient size to last throughout the life of the outer end of the ferrule isformed as two parpencil, even though very frequently used, it has allelly-arranged shovel-shaped arms or jaws .8, been proposed to make the eraser elementfof with a strait-edged top. 22 and side edges 24,

flat rectangular form, and to secure such eraser adapted to hold firmly between them the eraser 45 on the end of the pencil by means of clamping element 9, which-in front elevation isrectangular jaws, but this type of eraser and holding device in shape with rounded corners In. In cross see-- as heretofore manufactured have proved unsattion, asshown in top plan in Fig. 3 thelateral isfactory because the eraser could not be secured sides ll of the eraser are convex and lie substam firmly in position, so that after a comparatively tially in the longitudinal planes of the sides of 50 short period of use it became detached from the pencil.

One object of the present invention is to provide an eraser element for pencils of such construction that it projects laterally beyond the the cylindrical part 6 of the ferrule. The lateral edges l2 of the eraser are fiat with slightly rounded corners l3.

- The cylindrical portion 6. of the ferrule terminates at the point l5 in two laterally or transversely extending flat sections I6 (Fig. 4) which constitute bearing surfaces or seats for the eraser. From the point I 5 the ferrule extends outwardly as the shovel-shaped arms or jaws 8. The inner end of the eraser is seated against the flat transverse section or seats l6 of the ferrule and against the outer end I! of the pencil, as shown in Fig. 2. By means of this construction the inner end of the eraser is given a firm base or foundation.

The means for securely fastening the eraser 9 in position on the end of the pencil with its lower or inner edge resting on the end of the pencil and onthe ledges 16 of the transverse section l5 at the outer end of the cylindrical part 6 of the ferrule consists in thelarge teeth 23 projecting inwardly and downwardly into the lateral convex sides of the eraser 9 from each edge24 of the jaws 8.

By this means the eraser element is securely fastened in position on the end of the pencil and cannot be dislodged therefrom by any usual erasing operation to which it' may be subjected; To strengthen the jaws 8, and also to impart a more attractive appearance thereto, they are provided on each side with a circular boss 21 and with 'a raised chevron 28.

The portions of the eraser element 9 extending beyond thearms 8 of the ferrule are of such thickness, width and length, as to provide ample erasing material" to last throughout the life of the pencil, even when the pencil is used by school children for which the new pencil is particularly adapted, inasmuch as it affords them the longwearing erasing surfaces provided not only by the lateral edges l2 but also by the top end 2901 the eraser. venience and importance is the fact that the lateral sides of the eraser are convex and terminate in the relatively narrow lateral edges l2, enabling the user of the pencil to erase unwanted marks in a relatively narrow space which somener end of which adapted to rest on the seats of the transverse sections of the ferrule, said arm portions of the ferrule having two parallelly-arranged lateral edges each of which is provided with at least one inwardly projecting tooth adapted to extend into and firmly engage the eraser.

2; An eraser attachment for pencils comprising a ferrule having a cylindrical inner end adapted to be secured to one end of a pencil, two

. parallel arms the outer side surfaces of which are substantially in the longitudinal planes of the outer sides of the cylindrical ferrule, and two lateral transverse sections extending out- An additional feature of con wardly from the cylindrical part of the ferrule at the base of the arms, said transverse sections constituting eraser-supporting seats adapted to receive a substantially rectangular shaped eraser relatively thin in comparison with its length and width the inner end of which is adapted to rest on the, seats of the transverse sections of the ferrule, said arm portions of the ferrule having two parallelly-arranged lateral edges each of which is provided with at least one in- .wardly projecting tooth adapted to extend into and firmly engage the eraser to prevent the latter from movementwlth respect to the pencil.

3. An eraser attachment for pencils comprising a ferrule having a cylindrical inner portion adapted to be secured to one end of a pencil,

two parallel arms projecting from said cylindrical portion, and lateral transverse sections extending from the cylindrical part of the ferrule at the inner end of the arms, said transverse sections constituting eraser-supporting seats adapted to receive an eraser positioned between said arms with the eraser having an inner edge engaged with the seats of the transverse sections, the other edges of the eraser extending outwardly of the opposite side and end edges of the arms. and means at the opposite side edges of the arms adapted to extend into the body of the eraser to anchor the same against movement on the transverse seats.

4. An eraser attachment for pencils compris ing a ferrule having a cylindrical inner portion adapted to be secured to one end of a pencil, two parallel arms projecting from said cylindrical portion, and lateral transverse sections extending from the cylindrical part of the ferrule at the inner end of the arms, said transverse sections constituting eraser-supporting seats adapted to receive an eraser positioned between said arms with the eraser having an inner edge engaged with the seats of the transverse sections, the other edges of the eraser extending outwardly of the opposite side and end edges of the arms, and means at the opposite side ing a ferrule having a cylindrical inner portion adapted to be secured to one end of a pencil, two parallel arms projecting from said cylindrical portion, and lateral transverse sections extending from the cylindrical part of the ferrule at the inner end of the arms, said transverse sections constituting eraser-supporting seats adapted to receive an eraser positioned between said arms with the eraser having an inner edge engaged with the seats of the transverse sections, the other edges of the eraser extending outwardly of the opposite side and end edges of the arms, and at least one relatively large tooth on each side edge of the arms with said teeth on the opposed arms directed towards each other and towards the ferrule adapted when engaged with the eraser to hold the same on said :eats, and more firmly anchor the eraser in posiion.

HORACE B. VAN DORN.

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