US3777444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanding block and abrasive envelope therefor
Assignee: Individual
•
Filing: 1972-01-10
•
Granted: 1973-12-11
•
Expires: 1992-01-10
Abstract
Abstract Presented are two embodiments of a sanding block adapted to be inserted within an abrasive envelope configured to fit snugly around the block. The block and envelope assembly are configured to expose an optimum amount of abrasive surface to a surface to be smoothed. The block of one embodiment is preferably fabricated from a dense but flexible and resilient material which permits conformation of the abrasive surface of the assembly to a surface to be abraded, while the block of the second embodiment is preferably wedged, fabricated from a sponge-like material such as sponge rubber or polyurethane foam-type material, and beveled along lateral edges to provide a dual wedged configuration.
Inventors
- 👤 K Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:40
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
In combination: a a unitary wedge shaped support block having relatively flat sides converging from a relatively thick edge to a relatively thin edge; b a self-supporting envelope structure having an interior configured to receive the wedge shaped support block therewithin, said envelope being open at its end corresponding to the thick edge of said block and being closed at its end corresponding to the thin edge of said support block; and c abrasive material disposed on selected exterior surfaces of said envelope structure.
Claim 2
Dependent Claim
84 words
In combination: a a unitary wedge shaped support block having relatively flat sides converging from a relatively thick edge to a relatively thin edge; b a self-supporting envelope structure having an interior configured to receive the wedge shaped support block therewithin, said envelope being open at its end corresponding to the thick edge of said block and being closed at its end corresponding to the thin edge of said support block; and c abrasive material disposed on selected exterior surfaces of said envelope structure.
Claim 3
Dependent Claim
20 words
The combination according to claim 1, in which said sUpport block is fabricated from a flexible and resiliently compressible material.
Claim 4
Dependent Claim
34 words
The combination according to claim 1, in which said envelope structure is fabricated from paper stock and includes end edges formed by overlapped triangular tabs to provide a double thickness of said paper stock.
Claim 5
Dependent Claim
30 words
The combination according to claim 1, in which said wedge shaped support block is provided with end edges tapering from said flat converging sides to a relatively thin knife edge.
Claim 6
Dependent Claim
37 words
The combination according to claim 1, in which said wedge shaped support block is provided with lateral end edges beveled to provide divergent surfaces intercepting and angularly disposed to said relatively flat sides of the support block.
Claim 7
Dependent Claim
73 words
The combination according to claim 1, in which said envelope structure is formed from a single rectangular strip of material having an abrasive coating on one surface thereof, and a layer of adhesive along opposite longitudinal marginal edge portions of said strip whereby said adhesive coated portions overlap and abut in sealing relation when said strip is folded transversely midway between its ends to form a closed pocket to receive said support block.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |