# US 4,392,268 A · Chalkboard eraser cleaner system

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- Number: US 4,392,268 A
- Document ID: US4392268A
- Status: Granted
- Kind: A
- Application number: 06/330,687
- Filed: 1981-12-14
- Granted: 1983-07-12
- Earliest claimed: 1981-12-14
- Inventors: Victor M. Bueno
- Web page: https://patentgrep.com/patent/US4392268A

## CPC

- A47L 25/00: Domestic cleaning devices not provided for in other groups of this subclass (for cleaning spectacles G02C13/00)
- B43L 21/00: Blackboard or slate cleaning devices
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)
- B43L: ARTICLES FOR WRITING OR DRAWING UPON; {WRITING OR DRAWING AIDS;} ACCESSORIES FOR WRITING OR DRAWING (workshop equipment for marking-out work B25H7/00; teaching hand-writing or drawing G09B11/00)

## Abstract

A chalkboard eraser cleaner including a completely closeable, box-like housing containing an electrically driven, rotatable beater. At the top of the container is a side, slot-like opening with a door for the insertion of the eraser to be cleaned. Right below the area in which the eraser is inserted, there is an eraser support surface of somewhat slack, mesh netting material supported between the walls of the container for supporting the eraser during beating, with the mesh netting located directly above the rotatable beater whose arms impact the bottom of the eraser through the mesh netting to clean the eraser. Below the beater and the mesh is a removable drawer located at the bottom of the container which can be removed for the disposal of the eraser dust, which generally will fall into the drawer during use of the cleaner. An electrical contact switch is positioned in the container adjacent to the forward end of the area in which the eraser to be cleaned is inserted. After the eraser is initially inserted into the side, slot-like opening, the hinged door is then used to further push in the eraser, and, as the front end of the eraser hits and closes the electrical contact switch, the electric motor receives power and the beater is rotated by the electric drive, causing the eraser to be cleaned.

## Claims

### Claim 1

A chalkboard eraser cleaner, comprising:
an at least generally closed housing having wall portions;
a cylically moveable beater having impact members located in said container;
drive means associated with said beater for forcefully moving it; and
flexible mesh netting means supported by said wall portions and located adjacent to and above said beater for supporting the chalkboard eraser while it is being cleaned by impacts from said beater when it is moved, said beater impact members impacting the underside of said flexible mesh netting means when said beater is forcefully moved by said drive means.

### Claim 2 (depends on 1)

The eraser cleaner of claim 1, wherein there is further included:
opposed end wall portions forming with said side wall portions said container;
a horizontally disposed slot-like, entry-exit opening in a first one of said end wall portions, said netting means being position at the bottom of said slot-like opening and extending generally horizontally away therefrom into the interior of said housing.

### Claim 3 (depends on 2)

The eraser cleaner of claim 2, wherein there is further included:
spring-biased means located adjacent to the interior, eraser supporting end of said netting means for contacting the interior end of the eraser when it is fully inserted into said housing through said entry-exit opening; and
hinged door means for closing off said entry-exit opening and for contacting the rear, exteriorly oriented end of the eraser when it is inserted into said housing and engaging said spring-biased, said spring biased means at least initially pushing the eraser partially out of said housing when said door is opened.

### Claim 4 (depends on 3)

The eraser cleaner of claim 3, wherein said drive means comprises an electrical motor; and wherein said spring-biased means also serves as an electric contact switch in line with the electric power source for said electric motor.

### Claim 5 (depends on 1)

The eraser cleaner of claim 1, wherein there is further included:
chalk dust bin collecting drawer means located at the bottom of said housing below said netting means and said impact members for collecting and easily removing and disposing of the chalk dust collected during the cleaning of the erasers.

### Claim 6

A chalk board eraser cleaner, comprising:
an at least generally closed housing having wall portions;
a cylically moveable beater having impact members located in said container;
drive means associated with said beater for forcefully moving it;
support means supported by said wall portions and located adjacent to said beater for supporting the chalk board eraser while it is being cleaned by impacts from said beater when it is moved, said beater impact members impacting the underside of the eraser when said beater forcefully moved by said drive means;
opposed end wall portions forming with said side wall portions said container;
a slot-like, entry-exit opening in at least a first one of said end wall portions, said support means being positioned adjacent the bottom of said slot-like opening and extending away therefrom into the interior of said housing;
spring-biased means located adjacent to the interior, eraser supporting end of said support means for contacting the interior end of the eraser when it is fully inserted into said housing through said entry-exit opening; and
hinged door means for closing off said entry-exit opening and for contacting the exteriorly oriented part of the eraser when it is inserted into said housing and engaging said spring-biased, said spring biased means at least initially pushing the eraser partially out of said housing when said door is opened.

### Claim 7 (depends on 6)

The chalkboard eraser cleaner of claim 6, wherein said drive means comprises an electrical motor; and wherein said spring-biased means also serves as an electric contact switch in line with the electric power source for said electric motor.

### Claim 8 (depends on 6)

The chalkboard eraser cleaner of claim 6, wherein there is further included:
chalk dust bin collecting drawer means located at the bottom of said housing below said support means and said impact members for collecting and easily removing and disposing of the chalk dust collected during the cleaning of the erasers.

### Claim 9 (depends on 6)

The eraser cleaner of claim 6, wherein said support means comprises flexible, mesh netting means supported by said side wall portions and located adjacent to and above said beater for supporting the chalk board eraser while it is being cleaned by impacts from said beater when it is moved, said beater impact members impacting the underside of said flexible, mesh netting means when said beater is forcefully moved by said drive means.