US20070234498A1 - Chalk and dry marker eraser roller - Google Patents
Chalk and dry marker eraser roller Download PDFInfo
- Publication number
- US20070234498A1 US20070234498A1 US11/784,621 US78462107A US2007234498A1 US 20070234498 A1 US20070234498 A1 US 20070234498A1 US 78462107 A US78462107 A US 78462107A US 2007234498 A1 US2007234498 A1 US 2007234498A1
- Authority
- US
- United States
- Prior art keywords
- writing board
- board eraser
- main body
- hollow handle
- axel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
- B43L19/0037—Eraser cleaners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
- B43L19/0056—Holders for erasers
- B43L19/0068—Hand-held holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/04—Wiper holders
Definitions
- the present invention relates, in general, to erasers for writing boards and, more particularly, this invention relates to dust-capturing erasers for chalk and dry-marker boards.
- U.S. Pat. No. 6,347,898 and U.S. Pat. No. 6,932,531 are examples of the numerous patents disclosing board erasing devices on a handle, generally the butt end of a writing instrument. Besides being rather small, these do not address the dust issue.
- the present invention provides a writing board eraser consisting of a trough-like main body with two substantially flat end panels, a hollow handle integral and perpendicular to a longitudinal side of the main body, a soft flexible erasing pad covering about half of an oval cylinder surrounding an axel rod connected to a rotating lever, which enables rotating the erasing pad to contact a longitudinal scraping blade attached to the internal concave surface of the trough-like main body thus removing dust which then drops into the hollow handle, which has a threaded distal end with a mating cap for removal of accumulated dust.
- Another object of the present invention is to provide an improved board eraser that is inexpensive to manufacture and convenient to use.
- Still another object of the present invention is to provide an improved board eraser that makes is easy to dispose of collected dust without creating a mess in doing so.
- FIG. 1 is a perspective view of the dust-catching eraser.
- FIG. 2 is a horizontal elevation partial cut-away view of the device.
- FIG. 3 is a horizontal elevation partial cut-away view of the eraser with an alternative rotating means.
- the elongated trough-like body 12 has attached, near and perpendicular to its center point, an integral hollow handle 14 .
- a curved erasing pad 18 covering at least half of a rotatable oval cylinder surrounding axel rod 30 .
- the axel rod 30 extends slightly through marginally larger holes in end plates 32 .
- the butt end of handle 14 is threaded and cap 28 is removable to empty out accumulated dust.
- Lever 20 is tightly attached to one end of axel rod 30 .
- FIG. 2 provides an elevation end view of the device.
- the curved body 12 has an interior longitudinal scraping blade 26 , and an integral hollow handle 14 .
- the writing board is erased by the movement of the wiping head 18 against the writing board by the user.
- the lever 20 which is tightly attached to axel rod 30 , is flexed slightly outward to clear short tab 36 .
- the axel 30 and cylinder 16 with attached erasing pad 18 is rotated about 180 counterclockwise. As the erasing pad 18 rubs against scraper blade 26 , chalk or dry marker dust is dislodged and drops down into hollow handle 14 .
- the cylinder 16 is then rotated clockwise back into position and locked in place by sliding lever 20 over short tab 36 and stopping at taller tab 34 on end panel 32 . Periodically, accumulated dust is emptied out of handle 14 by removing cap 28 .
- FIG. 3 illustrates, in this partial cut-away horizontal elevation view, an alternative means for rotating the cylinder 16 and erasing pad 18 .
- the lever 27 is attached firmly to the axel rod 30 near its mid point.
- a push rod 22 is attached with a pivot pin 29 .
- the push rod 22 extends midway down inside hollow handle 14 and connects with slide switch 24 , which is partly exposed on the outside of handle 14 .
- slide switch 24 is pushed up a groove in handle 14 thereby rotating cylinder 16 and forcing dust off as erasing pad 18 passes over scraper blade 26 .
- the slide switch is then forced back down to return the erasing pad 18 to the front-facing position.
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
A writing board eraser consisting of a trough-like main body with two substantially flat end panels, a hollow handle integral and perpendicular to a longitudinal side of the main body, a soft flexible erasing pad covering at least half of an oval cylinder surrounding an axel rod connected to a rotating lever, which enables rotating the erasing pad to contact a longitudinal scraping blade attached to the internal concave surface of the trough-like main body thus removing dust which then drops into the hollow handle, which includes a threaded distal end with a mating cap for removal of accumulated dust.
Description
- This patent application is related to and claims priority from U.S. Provisional Patent Application Ser. No. 60/790,221 filed Apr. 7, 2006.
- The present invention relates, in general, to erasers for writing boards and, more particularly, this invention relates to dust-capturing erasers for chalk and dry-marker boards.
- Prior to the conception and development of the present invention, typical chalk board erasers and the like would remove the writing from the board, but the particles and dust created thereby would just drop to a ledge or the floor, and some would invariably get on the writer's hands and clothing.
- This problem was addressed to some extent by Yeo in U.S. Pat. No. 618,759, wherein a dust collecting chamber was built into a rather conventional rectangular felt eraser. A sliding door allowed for removal of the dust. Collection of the dust relied on the rubbing action of the erasing to force dust between the felt strips into the collection chamber. This would undoubtedly still leave a significant amount of dust on the front face of the eraser.
- Bell also addressed dust collection in U.S. Pat. No. 3,163,943 with a rather elaborate mechanical blackboard eraser that moved horizontally back and forth across the entire board on tracks above and below the board. This device would only work on boards equipped with the tracks, and erased everything top to bottom, thus not allowing spot erasing.
- Others have disclosed various ways to collect eraser dust using attached motorized vacuum devices, such as in U.S. Patent Application Publication Nos. 2006/0260092, 2005/0015923, and 2003/0033686. Obviously, these are somewhat expensive and noisy approaches to solving this problem.
- U.S. Pat. No. 6,347,898 and U.S. Pat. No. 6,932,531 are examples of the numerous patents disclosing board erasing devices on a handle, generally the butt end of a writing instrument. Besides being rather small, these do not address the dust issue.
- The present invention provides a writing board eraser consisting of a trough-like main body with two substantially flat end panels, a hollow handle integral and perpendicular to a longitudinal side of the main body, a soft flexible erasing pad covering about half of an oval cylinder surrounding an axel rod connected to a rotating lever, which enables rotating the erasing pad to contact a longitudinal scraping blade attached to the internal concave surface of the trough-like main body thus removing dust which then drops into the hollow handle, which has a threaded distal end with a mating cap for removal of accumulated dust.
- It is, therefore, one of the primary objects of the present invention to provide a dust-collecting chalk and dry marker board eraser.
- Another object of the present invention is to provide an improved board eraser that is inexpensive to manufacture and convenient to use.
- Still another object of the present invention is to provide an improved board eraser that makes is easy to dispose of collected dust without creating a mess in doing so.
- In addition to the various objects and advantages of the present invention described with some degree of specificity above it should be obvious that additional objects and advantages of the present invention will become more readily apparent to those persons who are skilled in the relevant art from the following more detailed description of the invention, particularly, when such description is taken in conjunction with the attached drawing figures and with the appended claims.
-
FIG. 1 is a perspective view of the dust-catching eraser. -
FIG. 2 is a horizontal elevation partial cut-away view of the device. -
FIG. 3 is a horizontal elevation partial cut-away view of the eraser with an alternative rotating means. - Prior to proceeding to the more detailed description of the present invention, it should be noted that, for the sake of clarity and understanding, identical components which have identical functions have been identified with identical reference numerals throughout the several views illustrated in the drawing figures.
- Referring to
FIG. 1 , the preferred embodiment of the dust-catchingboard eraser 10 is shown. The elongated trough-like body 12 has attached, near and perpendicular to its center point, an integralhollow handle 14. At the front face of the device is acurved erasing pad 18 covering at least half of a rotatable oval cylinder surroundingaxel rod 30. Theaxel rod 30 extends slightly through marginally larger holes inend plates 32. The butt end ofhandle 14 is threaded andcap 28 is removable to empty out accumulated dust.Lever 20 is tightly attached to one end ofaxel rod 30. -
FIG. 2 provides an elevation end view of the device. Thecurved body 12 has an interiorlongitudinal scraping blade 26, and an integralhollow handle 14. The writing board is erased by the movement of thewiping head 18 against the writing board by the user. When the user wishes to clear an excessive buildup of dust onerasing pad 18, thelever 20, which is tightly attached toaxel rod 30, is flexed slightly outward to clearshort tab 36. Theaxel 30 andcylinder 16 with attachederasing pad 18 is rotated about 180 counterclockwise. As the erasingpad 18 rubs againstscraper blade 26, chalk or dry marker dust is dislodged and drops down intohollow handle 14. Thecylinder 16 is then rotated clockwise back into position and locked in place by slidinglever 20 overshort tab 36 and stopping attaller tab 34 onend panel 32. Periodically, accumulated dust is emptied out ofhandle 14 by removingcap 28. -
FIG. 3 illustrates, in this partial cut-away horizontal elevation view, an alternative means for rotating thecylinder 16 and erasingpad 18. Thelever 27 is attached firmly to theaxel rod 30 near its mid point. At the distal end oflever 27, apush rod 22 is attached with apivot pin 29. Thepush rod 22 extends midway down insidehollow handle 14 and connects withslide switch 24, which is partly exposed on the outside ofhandle 14. To conduct the cleaning cycle, theslide switch 24 is pushed up a groove inhandle 14 thereby rotatingcylinder 16 and forcing dust off as erasingpad 18 passes overscraper blade 26. The slide switch is then forced back down to return theerasing pad 18 to the front-facing position. - While a presently preferred and an alternative embodiment of the present invention have been described in sufficient detail above to enable a person skilled in the relevant art to make and use the same, it should be obvious that various other adaptations and modifications can be envisioned by those persons skilled in such art without departing from either the spirit of the invention or the scope of the appended claims.
Claims (9)
1. A writing board eraser comprising:
a) a trough-like main body defining an open front side, a closed back side, and two substantially flat end panels;
b) a hollow handle integral to said main body and perpendicular to a longitudinal side of said main body approximately equidistant from each end, wherein said hollow handle includes a threaded distal end with a mating cap;
c) an axel rod with a predetermined length;
d) a pivotable cylinder, said cylinder fixed along a substantially central axis to said axel rod, said axel rod extending at each end beyond ends of said pivotable cylinder;
e) a soft flexible erasing pad covering at least half of outer surface of said pivotable cylinder;
f) a longitudinal scraping blade attached to internal concave surface of said trough-like main body; and
g) a rotating means connected to said axel rod to enable contacting said soft flexible erasing pad with said longitudinal scraping blade as said pivotable cylinder is rotated.
2. The writing board eraser, according to claim 1 , wherein said rotating means comprises a first lever arm perpendicular to said axel rod at about a center point and a push rod having one end pivotably connected to free end of said first lever arm and other end connected to a sliding switch housed within said hollow handle.
3. The writing board eraser, according to claim 1 , wherein said rotating means is a second lever arm attached perpendicular to said axel rod at one end adjacent external surface of one of said two flat end panels.
4. The writing board eraser, according to claim 1 , wherein said soft flexible erasing pad comprises multiple, parallel substantially flexible strips made of a preselected material imbedded longitudinally along about one half of said pivotable cylinder.
5. The writing board eraser, according to claim 4 , wherein said preselected material of said multiple parallel flexible strips is felt.
6. The writing board eraser, according to claim 1 , wherein said pivotable cylinder has an oval cross section perpendicular to its axis.
7. The writing board eraser, according to claim 1 , wherein said soft flexible erasing pad forms an arcuate erasing surface.
8. The writing board eraser, according to claim 3 , wherein said second lever arm is engageable with at least one of a clip and a stop tab on said external surface of said one end panel.
9. The writing board eraser, according to claim 1 , wherein said predetermined distance is about two to eight centimeters greater than overall length of said main body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/784,621 US20070234498A1 (en) | 2006-04-07 | 2007-04-09 | Chalk and dry marker eraser roller |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79022106P | 2006-04-07 | 2006-04-07 | |
US11/784,621 US20070234498A1 (en) | 2006-04-07 | 2007-04-09 | Chalk and dry marker eraser roller |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070234498A1 true US20070234498A1 (en) | 2007-10-11 |
Family
ID=38573509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/784,621 Abandoned US20070234498A1 (en) | 2006-04-07 | 2007-04-09 | Chalk and dry marker eraser roller |
Country Status (1)
Country | Link |
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US (1) | US20070234498A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US618759A (en) * | 1899-01-31 | Blackboard-eraser | ||
US20030033686A1 (en) * | 2001-08-07 | 2003-02-20 | Te-Hsi Liu | Dust collecting apparatus for eraser |
US20050015923A1 (en) * | 2003-07-22 | 2005-01-27 | Hsi-Hur Lai | Dustless eraser for blackboards |
US20060260009A1 (en) * | 2005-05-16 | 2006-11-16 | Jeong-Il Kim | Nucleic acid molecule encoding bathochromic phytochrome and use thereof |
-
2007
- 2007-04-09 US US11/784,621 patent/US20070234498A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US618759A (en) * | 1899-01-31 | Blackboard-eraser | ||
US20030033686A1 (en) * | 2001-08-07 | 2003-02-20 | Te-Hsi Liu | Dust collecting apparatus for eraser |
US20050015923A1 (en) * | 2003-07-22 | 2005-01-27 | Hsi-Hur Lai | Dustless eraser for blackboards |
US20060260009A1 (en) * | 2005-05-16 | 2006-11-16 | Jeong-Il Kim | Nucleic acid molecule encoding bathochromic phytochrome and use thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |