US4317660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing of flexible abrasives
Assignee: Sia Abrasives Industries AG
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Filing: 1980-04-28
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Granted: 1982-03-02
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Expires: 2000-04-28
Abstract
Abstract Abrasive grains are bound to a flexible support by a pattern of resin applied by means of a curved stencil having a wall thickness of 0.08 to 1 mm and having holes with a diameter of 0.05 to 3 mm, the total hole area amounting to 5 to 50% of the area of the stencil. A top binding agent is applied before or after the drying or hardening of the resin.
Inventors
- 👤 Jost Kramis
- 👤 Jakob Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A method of manufacturing a flexible abrasive, comprising the steps of applying a pattern of a base binding agent to a flexible support by means of a stencil, and binding abrasive grains to the support by means of the base binding agent, the stencil having a wall thickness of 0.08 to 1 mm and having holes with a diameter of 0.05 to 3 mm, the total area of the holes amounting to 5 to 50% of the area of the stencil.
Claim 2
Independent Claim
81 words
A method of manufacturing a flexible abrasive, comprising the steps of applying a pattern of a base binding agent to a flexible support by means of a stencil, and binding abrasive grains to the support by means of the base binding agent, the stencil having a wall thickness of 0.08 to 1 mm and having holes with a diameter of 0.05 to 3 mm, the total area of the holes amounting to 5 to 50% of the area of the stencil.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, in which the base binding agent is applied through a curved stencil by means of a doctor blade.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 1, including spreading abrasive grains on the pattern while the base bonding agent has bonding capacity, and then drying or hardening the base bonding agent.
Claim 5
Dependent Claim
20 words
A method as claimed in claim 1, in which the wall thickness of the stencil is 0.1 to 0.25 mm.
Claim 6
Dependent Claim
19 words
A method as claimed in claim 1, in which the diameter of the holes is 0.06 to 1 mm.
Claim 7
Dependent Claim
13 words
A method as claimed in claim 1, in which the holes are circular.
Claim 8
Dependent Claim
32 words
A method as claimed in claim 1, in which the abrasive grains on adjacent points of the pattern are spaced apart by less than half the mean grain diameter of the grains.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 7, in which the said grains just contact each other.
Claim 10
Dependent Claim
21 words
A method as claimed in claim 1, in which the mean diameter of the abrasive grains is 75 to 750 microns.
Claim 11
Dependent Claim
17 words
A method as claimed in claim 9, in which the mean diameter is 125 to 500 microns.
Claim 12
Dependent Claim
26 words
A method as claimed in claim 1, further comprising applying a top binding agent to the support bearing the base binding agent and the abrasive grains.
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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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |