Patent US3975868A successfully refreshed from Google Patents.
US3975868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanding device
Assignee: Individual
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Filing: 1975-07-07
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Granted: 1976-08-24
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Expires: 1995-07-07
Abstract
Abstract A sanding device having a sanding block wherein sheets of sandpaper can be easily and firmly mounted upon or readily detached from the block merely by inserting inwardly bent end tabs of the paper into slots in opposite end surfaces of the block. The top and bottom surfaces of the block are flat and of isosceles trapezoidal configuration with the opposed end surfaces of the block convergently inclined toward each other at an angle of about 84° to the longitudinal centerline of the block. Slots cut into the end surfaces closely adjacent the bottom and top surfaces of the block receive bent-in ends of the piece of sandpaper, the slight angle of the end surface to the direction of sanding creating a transverse force on the paper tending to shift the paper transversely toward the longer of the longitudinal sides of the block. The paper may be folded along crease lines congruent with the opposite end edges of the block, but preferably is heated and bent along the crease lines to permanently set the end tabs. Resilient pads are mounted on the top and bottom of the block.
Inventors
- 👤 Lloyd Botimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:38
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/02; B24D15/023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A sandpaper holder comprising a block-like body having parallel top and bottom surfaces, opposed longitudinal side surfaces on said body, flat opposite end surfaces on said body lying in planes normal to said top and bottom surfaces and convergently inclined relative to the longitudinal centerline of said body, and means defining a slot extending inwardly of said body from each of said opposite end surfaces, said slots extending transversely of said body from one of said longitudinal side surfaces to the other and each having an opening at said end surfaces extending in parallel adjacently spaced relationship to the bottom surface of said body.
Claim 2
Dependent Claim
104 words
A sandpaper holder comprising a block-like body having parallel top and bottom surfaces, opposed longitudinal side surfaces on said body, flat opposite end surfaces on said body lying in planes normal to said top and bottom surfaces and convergently inclined relative to the longitudinal centerline of said body, and means defining a slot extending inwardly of said body from each of said opposite end surfaces, said slots extending transversely of said body from one of said longitudinal side surfaces to the other and each having an opening at said end surfaces extending in parallel adjacently spaced relationship to the bottom surface of said body.
Claim 3
Dependent Claim
29 words
A sandpaper holder as defined in claim 1 wherein the angle of convergence of the planes of said end surfaces to said longitudinal centerline is between 84° and 90°.
Claim 4
Dependent Claim
20 words
The invention defined in claim 1 further comprising a flat resilient pad fixedly secured to and overlying said bottom surface.
Claim 5
Dependent Claim
19 words
The invention defined in claim 1 wherein said slots have opposed parallel side walls parallel to said bottom surface.
Claim 6
Dependent Claim
52 words
The invention defined in claim 1 comprising a pair of said slots in each of said end surfaces, each slot of each pair being spaced equidistant from the respective top and bottom surfaces of said body, and a resilient pad fixedly secured to and overlying each of said top and bottom surfaces.
Claim 7
Dependent Claim
155 words
A sanding block comprising a block like body having a flat bottom surface of isosceles trapezoidal shape, said body having opposed parallel longitudinal side surfaces and flat opposed convergently inclined end surfaces, means defining a slot extending inwardly of said body from each of said end surfaces, each slot extending from one longitudinal side surface to the other and having an opening at the end surface extending in parallel spaced adjacent relationship to said bottom surface, a sandpaper sheet having a flat main body portion of an isosceles trapezoidal configuration congruent to that of the bottom surface of said body and disposed in congruent underlying relationship with said bottom surface, and integral end tabs at each longitudinal end of said main body portion of said sheet reversely bent upwardly and inwardly of the main body portion of said sheet and projecting into said slots to retain said sheet on said bottom surface of said body.
Claim 8
Dependent Claim
155 words
A sanding block comprising a block like body having a flat bottom surface of isosceles trapezoidal shape, said body having opposed parallel longitudinal side surfaces and flat opposed convergently inclined end surfaces, means defining a slot extending inwardly of said body from each of said end surfaces, each slot extending from one longitudinal side surface to the other and having an opening at the end surface extending in parallel spaced adjacent relationship to said bottom surface, a sandpaper sheet having a flat main body portion of an isosceles trapezoidal configuration congruent to that of the bottom surface of said body and disposed in congruent underlying relationship with said bottom surface, and integral end tabs at each longitudinal end of said main body portion of said sheet reversely bent upwardly and inwardly of the main body portion of said sheet and projecting into said slots to retain said sheet on said bottom surface of said body.
Claim 9
Dependent Claim
38 words
The invention defined in claim 6 wherein said sheet is scored along crease lines defining opposite longitudinal ends of said main body portion of said sheet and said tabs are folded upwardly and inwardly along said crease lines.
Claim 10
Dependent Claim
29 words
The invention defined in claim 6 wherein said sheet is formed with a smoothly curved permanently set portion integrally interconnecting each of said tabs to said main body portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |