US4386943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated polyester fabric for use in flexible abrasives
Assignee: Vereinigte Schmirgel und Maschinen Fabriken AG
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Filing: 1980-06-30
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Granted: 1983-06-07
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Expires: 2000-06-30
Abstract
Abstract A treated polyester fabric for use as a carrier for a flexible abrasive is impregnated with a substance which comprises at least one amine formaldehyde resin. Preferably, in the dry state, the impregnating substance comprises at least 10% by weight of the resin(s), and weighs at least 20% of the weight of the fabric alone. Urea and melamine formaldehyde resins are particularly useful.
Inventors
- 👤 Harald Gumbel
- 👤 Gunter Bigorajski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:32
CPC Classifications
D; D06; D06N; D06N7/00; B; B24; B24D; B24D11/00; B24D11/001; C; C08; C08L; C08L61/00; C08L61/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2049; Y10T442/2057; Y10T442/2074
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
26 words
A flexible abrasive comprising abrasive particles bonded to a carrier which comprises a polyester fabric impregnated with a substance comprising at least one amine formaldehyde resin.
Claim 2
Dependent Claim
26 words
A flexible abrasive comprising abrasive particles bonded to a carrier which comprises a polyester fabric impregnated with a substance comprising at least one amine formaldehyde resin.
Claim 3
Dependent Claim
15 words
A flexible abrasive according to claim 1 wherein the substance comprises a urea formaldehyde resin.
Claim 4
Dependent Claim
15 words
A flexible abrasive according to claim 1 wherein the substance comprises a melamine formaldehyde resin.
Claim 5
Independent Claim
78 words
A method of producing a treated polyester fabric for use as a carrier of a flexible abrasive which comprises impregnating a raw polyester fabric with a substance which in the dry state comprises at least 10% by weight of at least one amine formaldehyde resin, the amount of substance impregnated being such that after drying the substance weighs at least 20% of the weight of the raw fabric, and drying the substance to form the desired treated fabric.
Claim 6
Independent Claim
78 words
A method of producing a treated polyester fabric for use as a carrier of a flexible abrasive which comprises impregnating a raw polyester fabric with a substance which in the dry state comprises at least 10% by weight of at least one amine formaldehyde resin, the amount of substance impregnated being such that after drying the substance weighs at least 20% of the weight of the raw fabric, and drying the substance to form the desired treated fabric.
Claim 7
Dependent Claim
23 words
A method according to claim 4 which includes the additional step of applying a backing coating to the fabric after the drying step.
Claim 8
Dependent Claim
18 words
A method according to claim 5 wherein the backing coating comprises a mixture of said substance and kaolin.
Claim 9
Dependent Claim
14 words
A method according to claim 4 wherein the substance comprises a urea formaldehyde resin.
Claim 10
Dependent Claim
14 words
A method according to claim 4 wherein the substance comprises a melamine formaldehyde resin.
Claim 11
Independent Claim
71 words
A method of producing a flexible abrasive which comprises impregnating a raw polyester fabric with a substance which in the dry state comprises at least 10% by weight of at least one amine formaldehyde resin, the amount of the substance impregnated being such that after drying the substance weighs at least 20% of the weight of the raw fabric, drying the substance, and bonding abrasive particles to the thus treated fabric.
Claim 12
Independent Claim
71 words
A method of producing a flexible abrasive which comprises impregnating a raw polyester fabric with a substance which in the dry state comprises at least 10% by weight of at least one amine formaldehyde resin, the amount of the substance impregnated being such that after drying the substance weighs at least 20% of the weight of the raw fabric, drying the substance, and bonding abrasive particles to the thus treated fabric.
Claim 13
Dependent Claim
13 words
A treated polyester fabric produced in accordance with the method of claim 4.
Claim 14
Dependent Claim
12 words
A flexible abrasive produced in accordance with the method of claim 9.
References Cited (Backward Citations)
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Cited
GB1515522A
Cited
US4140829A
Cited
US4038046A
Cited
GB1575972A
Cited
US4111667A
Cited
US4225321A
Cited
US4215171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |