US3430282A - Eraser device - Google Patents

Description

March 4, 1969 G.. H. PHILLIPS 3,430,282

ERASBR DEVICE Filed May 9, 1967 Mgg INVENTOR 4 F|G 3. George H. Phill-ips BY @0M/QM@ ATTORNEY United States Patent O 3,430,282 ERASER DEVICE George H. Phillips, Wiiston, N. Dak. 55801 Filed May 9, 1967, Ser. No. 637,254 ILS. Ci. IS-216 Int. Cl. B43l21/02;A47k 7/00; A471 25/08 2 'Claims ABSTRACT OF THE DISCLSURE This invention relates to cleaning equipment, more particularly the invention relates to equipment for cleaning blackboards and the like.

It is an object of this invention to provide a novel eraser having a removable cover which may be detached for Washing and replacement without having to Wash the entire eraser.

It is a further object of the invention to provide a novel eraser which has a cover which surrounds the eraser from one end to the other and -which is secured thereupon by a Zipper.

Further objects and advantages of the invention will become apparent as the description proceeds and when taken in conjunction with the accompanying drawing wherein:

FIGURE 1 is a perspective View of the eraser invention.

FIGURE 2 is a cross-sectional view of the eraser invention taken along line 2-2 of FIGURE 1.

FIGURE 3 is a side elevational view of the eraser invetion FIGURE 4 is a cross-sectional view of the eraser invention taken along line 4-4 of FIGURE 3.

FIGURE 5 is a cross-sectional view of a modified form of the invention.

Briefy stated, the invention comprises an elongated rectangular eraser, an elongated chamois skin sleeve of the same size as said eraser and surrounding said eraser snugly and under compression so as to secure said chamois skin to said eraser, said chamois skin sleeve having a zipper opening along its length for removal of said chamois for cleaning.

Referring more particularly to the drawings in FIGURE l, the eraser cover invention is illustrated as having a rectangular eraser 21 secured therein. The eraser has a wooden center plate 22 and sponge members 23 and 23 which are glued to the plate 22 and which form the upper and lower surfaces of the eraser. The chamois sleeve 24 surrounds the eraser snugly and under compression to secure the chamois skin sleeve 24 to the eraser. A zipper 25 is attached to the sleeve along the abutting edges 25 and 25" to connect the abutting edges together and to separate them when removing the chamois skin for cleaning.

The chamois skin sleeve is open at the opposing ends 26 and 27 of the eraser. In actual practice the eraser is approximately 18 inches long and approximately two inches wide. The chamois skin sleeve 24 has an inner circumference which is slightly less than the outer circumference of the eraser, along a plane laterally of the length of the eraser and chamois skin, so that the chamois skin sleeve when attached will compress the eraser slightly about its circumference to secure the chamois skin to the eraser.

ICS

The chamois skin sleeve will not slide relative to the sponge sides of the eraser when using the eraser and cover invention to wipe off blackboards because of the friction between the sponge surfaces of the eraser and the chamois skin sleeve. The chamois skin can be easily removed by unzipping the zipper Z5, but is for practical purposes unremovable by normally attempting to slide the sleeve off the eraser without tearing the chamois skin sleeve because of the extreme amount of force that may be necessary.

In operation, the eraser with the chamois skin sleeve attached will be used to clean blackboards using the chamois skin as the cleaning surface to clean the chalk olf the blackboard. The sleeve may be removed by unzipping and washed when the chamois becomes saturated with chalk, thus eliminating any need for washing the eraser itself.

In the modified form of the invention, the sponge rubber surfaces may be covered with a thin layer of chamois skin 28 and glued thereto. The thin chamois skin extends along the length of the inner eraser 2l and covers the upper sponge surface 23 and a portion of the lower sponge surface 23 as illustrated in FIGURE 5. In the preferred form, the thin chamois skin is not used and the eraser sleeve 24 directly contacts the sponge members 23 and 23.

Thus, it will be seen that a novel eraser has been provided with a detachable chamois skin sleeve which sleeve will engage the blackboard for cleaning the blackboard, and which will firmly adhere to the eraser for firm positive erasing action and which may be easily removed and washed.

It will be obvious that various changes and departures may be made in the invention without departing from the spirit and scope thereof and accordingly it is not intended that the invention be limited to that specifically shown in the drawing or described in the specification but only as set forth in the appended claims wherein:

What is claimed is:

l. An elongated eraser device having opposed, outer spongeous surfaces, an elongated chamois skin sleeve surrounding said opposed, outer spongeous surfaces and at least substantially coextensive in length with said opposed outer spongeous surfaces, said sleeve having open ends, said sleeve having a zipper along its length connecting the opposing edges of the chamois skin sleeve together to form said sleeve, said sleeve having an inner cimcumference slightly less than the outer circumference of said opposed, outer spongeous surfaces to snugly secure said sleeve to said eraser.

2. An elongated eraser device according to claim 1 wherein said device includes a thin chamois skin fixed to at least one of said opposed, outer spongeous surfaces and said thin chamois skin is interposed between at least said one of said spongeous surfaces and said sleeve whereby said chamois skin sleeve will not tend to slide relative to the opposed, outer spongeous surfaces.

References Cited UNITED STATES PATENTS 2,007,238 7/1935 Anderson l5-2l0 2,209,275 7/1940 Lawrence 15-210 FOREIGN PATENTS 465,716 5/1937 Great Britain. Ad. 65,097 9/1955 France.

WALTER A. SCHEEL, Primary Examiner.

LEON G. MACHLIN, Assistant Examiner.

U.S. Cl. X.R.

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