US3888640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for flexible abrasive bands
Assignee: Vereinigte Schmirgel und Maschinen Fabriken AG
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Filing: 1973-01-22
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Granted: 1975-06-10
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Expires: 1993-01-22
Abstract
Abstract A binder for the grinding grains of grinding bodies comprising animal glues or synthetic resins and fillers, to which is added 1 to 50%, and preferably 10 to 30%, by weight of a chlorinated paraffin or other organic halogen compound, to improve the grinding efficiency.
Inventors
- 👤 Gunter Bigorajski
- 👤 Joachim Ellerkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A COATED FLEXIBLE ABRASIVE BAND COMPRISING A FLEXIBLE SUPPORT AND ABRASIVE GRINDING GRAINS BONDED ON THE FLEXIBLE SUPPORT, SAID GRINDING GRAINS COATED WITH A FINAL COATING COMPRISING A. 25-30 PARTS BY WEIGHT OF PHENOL-FORMALDEHYDE RESIN IN ADMIXTURE WITH; B. 10-25 PARTS BY WEIGHT OF A CHLORINATED PARAFFIN HAVING 50-70% BY WEIGHT CHLORINE AND SELECTED FROM THE GROUP CONSISTING OF CHLORINATED SOLID PARAFFINS AND A LIQUID CHLORINATED PARAFFIN OIL HAVING A VISCOSITY AT 20*C OF AT LEAST 500 CP., AND, C. 50-60 PARTS BY WEIGHT OF CALCIUM CARBONATE FILLER, SAID COATING RETARDING THE BLUNTING OF THE GRINDING GRAINS AND IMPROVING THE GRINDING EFFICIENCY AND LIFE OF THE BAND.
Claim 2
Dependent Claim
107 words
A COATED FLEXIBLE ABRASIVE BAND COMPRISING A FLEXIBLE SUPPORT AND ABRASIVE GRINDING GRAINS BONDED ON THE FLEXIBLE SUPPORT, SAID GRINDING GRAINS COATED WITH A FINAL COATING COMPRISING A. 25-30 PARTS BY WEIGHT OF PHENOL-FORMALDEHYDE RESIN IN ADMIXTURE WITH; B. 10-25 PARTS BY WEIGHT OF A CHLORINATED PARAFFIN HAVING 50-70% BY WEIGHT CHLORINE AND SELECTED FROM THE GROUP CONSISTING OF CHLORINATED SOLID PARAFFINS AND A LIQUID CHLORINATED PARAFFIN OIL HAVING A VISCOSITY AT 20*C OF AT LEAST 500 CP., AND, C. 50-60 PARTS BY WEIGHT OF CALCIUM CARBONATE FILLER, SAID COATING RETARDING THE BLUNTING OF THE GRINDING GRAINS AND IMPROVING THE GRINDING EFFICIENCY AND LIFE OF THE BAND.
Claim 3
Dependent Claim
17 words
An abrasive band as in claim 1 wherein said chlorinated paraffin is uniformly distributed throughout said coating.
Claim 4
Dependent Claim
64 words
An abrasive band as in claim 1 wherein the paraffin in said coating is the reaction product of a nitrogen compound selected from the group consisting of ammonia and amines and said chlorinated paraffin selected from the group consisting of said chlorinated solid paraffin and said liquid chlorinated paraffin oil at a weight ratio of chlorinated paraffin to nitrogen compound between 20:1 and 4:1.
Claim 5
Dependent Claim
29 words
A abrasive band as in claim 3 wherein the amine is selected from the group consisting of ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, ethanolamine and diethanol amine.
Claim 6
Dependent Claim
20 words
An abrasive band as in claim 1 wherein said resin is the alkali adjusted condensation product of formaldehyde and phenol.
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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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |