CA1214642A - Sanding block - Google Patents
Sanding blockInfo
- Publication number
- CA1214642A CA1214642A CA000445242A CA445242A CA1214642A CA 1214642 A CA1214642 A CA 1214642A CA 000445242 A CA000445242 A CA 000445242A CA 445242 A CA445242 A CA 445242A CA 1214642 A CA1214642 A CA 1214642A
- Authority
- CA
- Canada
- Prior art keywords
- abrasive sheet
- side walls
- sheet material
- base
- wing members
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
- B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
" SANDING BLOCK "
A holder for sandpaper composed of a truncated triangular prismatic body having an axial bore for storing a roll of sandpaper the end of which is drawn through a lateral slot and around the base of the body, and including a pair of wings hinged at one side to the apex of the body to be clamped upon the sandpaper when pressure to applied in use of the holder.
" SANDING BLOCK "
A holder for sandpaper composed of a truncated triangular prismatic body having an axial bore for storing a roll of sandpaper the end of which is drawn through a lateral slot and around the base of the body, and including a pair of wings hinged at one side to the apex of the body to be clamped upon the sandpaper when pressure to applied in use of the holder.
Description
1~14~Z
The present invention relates to abrasive sheet holders which enable operators to hold and manipulate abrasive sheeting in order to resurface a surface.
BACKGROUND OF INVENTION
. . .
Conventional abrasive sheet holders are of various degrees of sophistication. They vary from a simple block of wood to rubber holders with lift-up flaps and spikes which skewer the abrasive sheeting in position. These types of holders have inherent disadvantages which lead to misuse and improper functioning of the tool. For example, the block of wood usually requires much pressure from the operator's hands to keep the abrasive sheeting in place. The necessary force is usually orthogonal to the direction of application of the force to the surface to be prepared, as well as orthogonal to the direction of motion of the tool. The rubber holder with spikes, which skewer the abrasive sheeting in place, are quite cumbersome when replacement of the sheeting is required. Also, the sheeting has to be cut to roughly the required length to fit to the holder and this consumes even more time.
It is an object of the present invention to provide an abrasive sheet holder which overcomes or substantially ameliorates the abovementioned disadvantages.
SUMMARY OF INVENTION
According to one general form of the present invention there is provided an abrasive sheet material holder (1) for storing abrasive sheet material and frictionally holding same while in use, said holder comprising a main body (2) of truncated triangular form in transverse cross-section having a base (14), first and second spaced-apart side walls (13,15) ~_ and a cylindrical axial bore (11) defined by said body to store therein a roll of said abrasive sheet material and provided with a lateral slot (12) extending through a first one (13) of said side walls of said body for protrusion of an end portion of said abrasive sheet material through said slot for laying over part of the exterior surface of said first side wall, under the base of said main body and over at least part of the exterior surface of the other of said side walls (15), a pair of wing members (3,4) fastened to the body and closable upon respective ones of the side walls to form an assembly for gripping in a user's hand and providing for retention of said abrasive sheet material at the side walls solely by frictional clamping thereon of said wing members under pressure applied by said user's hand, and hinges (7,8) fastening each of said wing members to near the truncated apex (2A) of said body and having parts protruding from said wing members which are concealed within recesses (5,6) within the body when the said wing members are closed.
Preferably the abrasive sheet holder is constructed of plastic, which may be injection moulded or extruded, or it may be constructed of any other suitable material, e.g. wood.
Further, it is preferable that the bearing surface, i.e. the base, of the holder be covered by a plate of substantially inflexible material.
The length and width of the holder are such that the holder is suitable for hand-held operation and manipulation.
It is also a preferred feature that the lateral slot in the body which allows passage of the abrasive sheet material from the storage compartment to the working surface should be s-lbstantially parallel to the base and trucated apex.
~ 3 ~;~14f~4~
According to a second aspect of the present invention, there is provided an abrasive sheet ~aterial holder for storing a roll of abrasive sheet material and frictionally holding said abrasive sheet while in use, comprising:
a main body of trucated triangular form in transverse cross-section having a hollow base with a plurality of reinforcing ribs, said base supporting equally inclined, downwardly diverging side walls and having a cylindrical axial bore provided with a lateral slot communicating with a 0 first one of sai.d side walls;
an inflexible plate covering said base as a bearing surface for said abrasive sheet;
a pair of wing members fastened to said body, each adapted to open and close upon one of said side walls, said wing members being grippable by a user's hand when closed; and two pairs of elongate plates fastening each of said wing members to said body, each plate being pivotably attached at a first end to one of said wing members and pivotably attached at a second end to said body proximate the truncated apex of said body, said second ends of the plates being accommodated within recesses within said body when the wings are closed;
whereby said roll of abrasive sheet can be placed in said axial bore and an unwound portion of said sheet can be extended through said lateral slot, over a portion of said first side wall, across said base plate and over a portion of a second side wall, thereby providing for retention of said abrasive sheet at said side walls solely by frictional clamping of said wing members on said side walls under pressure applied by said user's hand.
.~
Preferably the outer wall of each wing member i~
contoured to facilitate gripping by the user.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the drawings, in which:
Fig. 1 is a top perspective view of one embodiment of the present invention;
Fig. 2 is a top perspective view of the holder of Fig. 1 showing the wing members in the opened position;
Fig. 3 is a perspective from beneath; and Fig. 4 is an end elevation on a transverse section line IV-IV taken through Fig. 3.
BEST MODE OF CAR~YING OUT THE INVENTION
As illustrated in the drawings, the holder 1 comprises a block 2 having a truncated triangular transverse cross-section and having equally inclined, downwardly diverging side walls 13 and 15 between wings 3 and 4. Hinge plates 7 and 8 (Fig. 2) attach wing 3 to the block 2 adjacent the apex 2A and ends of the hinge plates 7 and 8 protruding from the wing 3 are concealed within recesses 5 and 6 when the wing 3 is closed as shown in Fig. 1. The hinge plate 7 is attached to the wing 3 by means of pivot 9, and attached to the block 2 by means of pivot 10.
The pivots 9 and 10 extend into the respective members 3 and 2 passing through hinge plate 7. A similar arrangement exists for the other hinge locations.
This two-pivot type hinge arrangement allows the wings 3 and 4 to be opened into a position as shown in Figs. 2 to 4.
The block 2 also contains a cylindrical bore 11 with a lateral slot 12 which extends between the inclined side wall ~ 5 i4~
13 and the bore 1l. Within the bore 11 a roll of abrasive sheeting (not illustrated) can be stored and an end portion fed through the slot 12. The unwound portion of abrasive sheeting is passed around the base surface 14 of the block 2 and up the other inclinded side wall 15. By then 4~
returning the wings 3 and 4 to their original closed position, as shown in Fig. 1, a terminal piece of abrasive sheeting is clamped into place between the wings 3 and 4 and the side walls 13 and lS.
Further, when the holder 1 is used to sand down a surface, the downward pressure applied to the holder 1 will provide an even greater clamping force on to the abrasive sheeting by virtue of the divergence of the surfaces 13 and 15.
The base surface 14, it will be appreciated, should provide a firm flat face so as to apply the abrasive sheeting with uniform pressure to a workpiece. When the block is composed of moulded thermoplastic material special provision may be necessary to avoid distortion of the surface 14 in curing. According to one embodiment this is achieved by forming the block as a hollow shell and providing a recess 18 in the base and transverse reinforcing ribs 19 therein (see Fig. 3). A metal, plas~cics, or other plate 17 (Figs. 1, 2 and 4) may be cemented to the outer edges of these ribs 19 as a bearing face for the abrasive sheeting. Opposite depending end flanges 16 will serve as a shroud to protect the otherwise exposed edges of the abrasive sheeting.
Finger-engaging, part-spherical depressions 20 divided between an end of the block 2 and a respective one of the wings 3 and 4 facilitate gripping of opposite ends of each wing 3 or 4 to open it.
Whereas a preferred embodiment has been described in the foregoing passages it will be understood that other forms and modifications are feasible within the scope of the invention.
AAC/35r A -~
The present invention relates to abrasive sheet holders which enable operators to hold and manipulate abrasive sheeting in order to resurface a surface.
BACKGROUND OF INVENTION
. . .
Conventional abrasive sheet holders are of various degrees of sophistication. They vary from a simple block of wood to rubber holders with lift-up flaps and spikes which skewer the abrasive sheeting in position. These types of holders have inherent disadvantages which lead to misuse and improper functioning of the tool. For example, the block of wood usually requires much pressure from the operator's hands to keep the abrasive sheeting in place. The necessary force is usually orthogonal to the direction of application of the force to the surface to be prepared, as well as orthogonal to the direction of motion of the tool. The rubber holder with spikes, which skewer the abrasive sheeting in place, are quite cumbersome when replacement of the sheeting is required. Also, the sheeting has to be cut to roughly the required length to fit to the holder and this consumes even more time.
It is an object of the present invention to provide an abrasive sheet holder which overcomes or substantially ameliorates the abovementioned disadvantages.
SUMMARY OF INVENTION
According to one general form of the present invention there is provided an abrasive sheet material holder (1) for storing abrasive sheet material and frictionally holding same while in use, said holder comprising a main body (2) of truncated triangular form in transverse cross-section having a base (14), first and second spaced-apart side walls (13,15) ~_ and a cylindrical axial bore (11) defined by said body to store therein a roll of said abrasive sheet material and provided with a lateral slot (12) extending through a first one (13) of said side walls of said body for protrusion of an end portion of said abrasive sheet material through said slot for laying over part of the exterior surface of said first side wall, under the base of said main body and over at least part of the exterior surface of the other of said side walls (15), a pair of wing members (3,4) fastened to the body and closable upon respective ones of the side walls to form an assembly for gripping in a user's hand and providing for retention of said abrasive sheet material at the side walls solely by frictional clamping thereon of said wing members under pressure applied by said user's hand, and hinges (7,8) fastening each of said wing members to near the truncated apex (2A) of said body and having parts protruding from said wing members which are concealed within recesses (5,6) within the body when the said wing members are closed.
Preferably the abrasive sheet holder is constructed of plastic, which may be injection moulded or extruded, or it may be constructed of any other suitable material, e.g. wood.
Further, it is preferable that the bearing surface, i.e. the base, of the holder be covered by a plate of substantially inflexible material.
The length and width of the holder are such that the holder is suitable for hand-held operation and manipulation.
It is also a preferred feature that the lateral slot in the body which allows passage of the abrasive sheet material from the storage compartment to the working surface should be s-lbstantially parallel to the base and trucated apex.
~ 3 ~;~14f~4~
According to a second aspect of the present invention, there is provided an abrasive sheet ~aterial holder for storing a roll of abrasive sheet material and frictionally holding said abrasive sheet while in use, comprising:
a main body of trucated triangular form in transverse cross-section having a hollow base with a plurality of reinforcing ribs, said base supporting equally inclined, downwardly diverging side walls and having a cylindrical axial bore provided with a lateral slot communicating with a 0 first one of sai.d side walls;
an inflexible plate covering said base as a bearing surface for said abrasive sheet;
a pair of wing members fastened to said body, each adapted to open and close upon one of said side walls, said wing members being grippable by a user's hand when closed; and two pairs of elongate plates fastening each of said wing members to said body, each plate being pivotably attached at a first end to one of said wing members and pivotably attached at a second end to said body proximate the truncated apex of said body, said second ends of the plates being accommodated within recesses within said body when the wings are closed;
whereby said roll of abrasive sheet can be placed in said axial bore and an unwound portion of said sheet can be extended through said lateral slot, over a portion of said first side wall, across said base plate and over a portion of a second side wall, thereby providing for retention of said abrasive sheet at said side walls solely by frictional clamping of said wing members on said side walls under pressure applied by said user's hand.
.~
Preferably the outer wall of each wing member i~
contoured to facilitate gripping by the user.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the drawings, in which:
Fig. 1 is a top perspective view of one embodiment of the present invention;
Fig. 2 is a top perspective view of the holder of Fig. 1 showing the wing members in the opened position;
Fig. 3 is a perspective from beneath; and Fig. 4 is an end elevation on a transverse section line IV-IV taken through Fig. 3.
BEST MODE OF CAR~YING OUT THE INVENTION
As illustrated in the drawings, the holder 1 comprises a block 2 having a truncated triangular transverse cross-section and having equally inclined, downwardly diverging side walls 13 and 15 between wings 3 and 4. Hinge plates 7 and 8 (Fig. 2) attach wing 3 to the block 2 adjacent the apex 2A and ends of the hinge plates 7 and 8 protruding from the wing 3 are concealed within recesses 5 and 6 when the wing 3 is closed as shown in Fig. 1. The hinge plate 7 is attached to the wing 3 by means of pivot 9, and attached to the block 2 by means of pivot 10.
The pivots 9 and 10 extend into the respective members 3 and 2 passing through hinge plate 7. A similar arrangement exists for the other hinge locations.
This two-pivot type hinge arrangement allows the wings 3 and 4 to be opened into a position as shown in Figs. 2 to 4.
The block 2 also contains a cylindrical bore 11 with a lateral slot 12 which extends between the inclined side wall ~ 5 i4~
13 and the bore 1l. Within the bore 11 a roll of abrasive sheeting (not illustrated) can be stored and an end portion fed through the slot 12. The unwound portion of abrasive sheeting is passed around the base surface 14 of the block 2 and up the other inclinded side wall 15. By then 4~
returning the wings 3 and 4 to their original closed position, as shown in Fig. 1, a terminal piece of abrasive sheeting is clamped into place between the wings 3 and 4 and the side walls 13 and lS.
Further, when the holder 1 is used to sand down a surface, the downward pressure applied to the holder 1 will provide an even greater clamping force on to the abrasive sheeting by virtue of the divergence of the surfaces 13 and 15.
The base surface 14, it will be appreciated, should provide a firm flat face so as to apply the abrasive sheeting with uniform pressure to a workpiece. When the block is composed of moulded thermoplastic material special provision may be necessary to avoid distortion of the surface 14 in curing. According to one embodiment this is achieved by forming the block as a hollow shell and providing a recess 18 in the base and transverse reinforcing ribs 19 therein (see Fig. 3). A metal, plas~cics, or other plate 17 (Figs. 1, 2 and 4) may be cemented to the outer edges of these ribs 19 as a bearing face for the abrasive sheeting. Opposite depending end flanges 16 will serve as a shroud to protect the otherwise exposed edges of the abrasive sheeting.
Finger-engaging, part-spherical depressions 20 divided between an end of the block 2 and a respective one of the wings 3 and 4 facilitate gripping of opposite ends of each wing 3 or 4 to open it.
Whereas a preferred embodiment has been described in the foregoing passages it will be understood that other forms and modifications are feasible within the scope of the invention.
AAC/35r A -~
Claims (7)
1. An abrasive sheet material holder for storing abrasive sheet material and frictionally holding same while in use, said holder comprising a main body of truncated triangular form in transverse cross-section having a base, first and second spaced-apart side walls and a cylindrical axial bore defined by said body to store therein a roll of said abrasive sheet material and provided with a lateral slot extending through a first one of said side walls of said body for protrusion of an end portion of said abrasive sheet material through said slot for laying over part of the exterior surface of said first side wall, under the base of said main body and over at least part of the exterior surface of the other of said side walls;
a pair of wing members fastened to the body and closable upon respective ones of the side walls to form an assembly for gripping in a user's hand and providing for retention of said abrasive sheet material at the side walls solely by frictional clamping thereon of said wing members under pressure applied by said user's hand, and hinges fastening each of said wing members to near the truncated apex of said body and having parts protruding from said wing members which are concealed within recesses within the body when the said wing members are closed.
a pair of wing members fastened to the body and closable upon respective ones of the side walls to form an assembly for gripping in a user's hand and providing for retention of said abrasive sheet material at the side walls solely by frictional clamping thereon of said wing members under pressure applied by said user's hand, and hinges fastening each of said wing members to near the truncated apex of said body and having parts protruding from said wing members which are concealed within recesses within the body when the said wing members are closed.
2. An abrasive sheet material holder according to claim 1, wherein each of the hinges comprises a plate pivoted at opposite ends respectively to said body and to one of said wings.
3. An abrasive sheet material holder according to claim 1, wherein said side walls are downwardly diverging whereby said clamping is effected by downward pressure exerted upon the wing members.
4. An abrasive sheet material holder according to claim 1, 2 or 3, wherein said base is covered by a substantially inflexible plate serving as a bearing surface of said abrasive sheet.
5. An abrasive sheet material holder according to claim 1, 2 or 3, wherein said base is covered by a substantially inflexible plate serving as a bearing surface of said abrasive sheet and wherein said base is hollow and provided with a plurality of reinforcing ribs.
6. An abrasive sheet material holder according to claims 1, 2 or 3, wherein said base is covered by a substantially inflexible plate serving as a bearing surface of said abrasive sheet, said base is hollow and provided with a plurality of reinforcing ribs and finger engaging impressions are provided in an end of the body to facilitate gripping at each of said wings.
7. An abrasive sheet material holder for storing a roll of abrasive sheet material and frictionally holding said abrasive sheet while in use, comprising:
a main body of truncated triangular form in transverse cross-section having a hollow base with a plurality of reinforcing ribs, said base supporting equally inclined, downwardly diverging side walls and having a cylindrical axial bore provided with a lateral slot communicating with a first one of said side walls;
an inflexible plate coving said base as a bearing surface for said abrasive sheet;
a pair of wing members fastened to said body, each adapted to open and close upon one of said side walls, said wing members being grippable by a user's hand when closed; and two pairs of elongate plates fastening each of said wing members to said body, each plate being pivotably attached at a first end to one of said wing members and pivotably attached at a second end to said body proximate the truncated apex of said body, said second ends of the plates being accommodated within recesses within said body when the wings are closed;
whereby said roll of abrasive sheet can be placed in said axial bore and an unwound portion of said sheet can be extended through said lateral slot, over a portion of said first side wall, across said base plate and over a portion of a second side wall, thereby providing for retention of said abrasive sheet at said side walls solely by frictional clamping of said wing members on said side walls under pressure applied by said user's hand.
a main body of truncated triangular form in transverse cross-section having a hollow base with a plurality of reinforcing ribs, said base supporting equally inclined, downwardly diverging side walls and having a cylindrical axial bore provided with a lateral slot communicating with a first one of said side walls;
an inflexible plate coving said base as a bearing surface for said abrasive sheet;
a pair of wing members fastened to said body, each adapted to open and close upon one of said side walls, said wing members being grippable by a user's hand when closed; and two pairs of elongate plates fastening each of said wing members to said body, each plate being pivotably attached at a first end to one of said wing members and pivotably attached at a second end to said body proximate the truncated apex of said body, said second ends of the plates being accommodated within recesses within said body when the wings are closed;
whereby said roll of abrasive sheet can be placed in said axial bore and an unwound portion of said sheet can be extended through said lateral slot, over a portion of said first side wall, across said base plate and over a portion of a second side wall, thereby providing for retention of said abrasive sheet at said side walls solely by frictional clamping of said wing members on said side walls under pressure applied by said user's hand.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPF7634 | 1983-01-17 | ||
| AUPF763483 | 1983-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1214642A true CA1214642A (en) | 1986-12-02 |
Family
ID=3769935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445242A Expired CA1214642A (en) | 1983-01-17 | 1984-01-13 | Sanding block |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2311084A (en) |
| CA (1) | CA1214642A (en) |
| GB (1) | GB2133327B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8427392U1 (en) * | 1984-09-17 | 1984-12-13 | Madzgalla, Hans-Georg, 5400 Koblenz | GRINDING AND POLISHING TOOL |
| GB2350574A (en) * | 1999-02-12 | 2000-12-06 | Roy William Jarman | An articulated sanding block |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB260829A (en) * | 1926-02-22 | 1926-11-11 | Adolph Kunke Hillson | Improvements relating to hand blocks for use in supporting sheets of abrasive or polishing material |
| GB604651A (en) * | 1945-12-10 | 1948-07-07 | Lilian Kathleen Percival | Improvements in holders for abrasive cloths, polishing cloths and the like |
| GB662220A (en) * | 1948-11-08 | 1951-12-05 | Behr Manning Corp | Hand sander |
| GB941415A (en) * | 1961-01-16 | 1963-11-13 | Consolidation Coal Co | Idler roller assemblies for supporting conveyor belts |
| GB952537A (en) * | 1962-02-13 | 1964-03-18 | William Lidster | Improvements in hand sanding tools |
-
1983
- 1983-01-17 AU AU23110/84A patent/AU2311084A/en not_active Abandoned
-
1984
- 1984-01-12 GB GB08400793A patent/GB2133327B/en not_active Expired
- 1984-01-13 CA CA000445242A patent/CA1214642A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU2311084A (en) | 1984-07-19 |
| GB2133327B (en) | 1986-07-16 |
| GB8400793D0 (en) | 1984-02-15 |
| GB2133327A (en) | 1984-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |