US3875703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible sanding disc unit
Assignee: Individual
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Filing: 1973-12-26
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Granted: 1975-04-08
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Expires: 1993-12-26
Abstract
Abstract A flexible adapter unit is used in mounting a flexible abrasive disc to the surface of a motorized rotary operator such as is commonly used in relatively light sanding operations. As sold, the unit is a package-like lamination of three discs adhesively secured in a stack, namely a basic intermediate membrane disc bearing a pressure-sensitive coating on each of the opposite sides thereof, and a pair of thin outer strippable protective cover members, one adhered releasably on either side of the membrane. Said last-named members are thin flexible discs, each preferably being wax or otherwise coated on an inner side thereof to present a somewhat glossy, entirely non-tacky surface adherently engaging a membrane surface coating. The intermediate membrane disc is also flexible, and may vary considerably as to material; and it is coated on its opposite sides with pressuresensitive adhesive layers. These, though by preference being in common of a known latex composition, yet vary considerably in an operational characteristic of said composition. That is, one of said coatings or layers, as applied in use to a rotary tool surface, is a relatively heavy one having a relatively high degree of tacky adhesiveness, so as to adhere tightly to the tool surface as so applied, yet being removably strippable manually from said surface. The other or outer adhesive layer is lighter and substantially less tacky adhesively, yet sufficiently so to have ready pressed-on engagement with the non-abrasive rear side of a sanding disc, while still allowing the latter to be readily stripped from the membrane disc and discarded when worn.
Inventors
- 👤 Joseph V Clemente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
B; B24; B24D; B24D11/00; B24D13/00; B24D13/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
182 words
A flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit consisting in its entirety of a temporary lamination of an intermediate flexible membrane of thin, substantially inelastic sheet material and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, and another and specifically different pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a readily releaseable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, the adhesive bond to said abrasive sheet effected by said first-named coating on the outer membrane surface being substantially less strong and more readily releasable than the bond of the inner membrane surface coating to said operator surface.
Claim 2
Dependent Claim
182 words
A flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit consisting in its entirety of a temporary lamination of an intermediate flexible membrane of thin, substantially inelastic sheet material and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, and another and specifically different pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a readily releaseable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, the adhesive bond to said abrasive sheet effected by said first-named coating on the outer membrane surface being substantially less strong and more readily releasable than the bond of the inner membrane surface coating to said operator surface.
Claim 3
Dependent Claim
28 words
The adapter unit of claim 1, in which the membrane bonds to the respective strip sheets are weaker than either of the abrasive sheet and operator surface bonds.
Claim 4
Dependent Claim
45 words
The adapter unit of claim 1 as a circular disc unit applied in adhesive combination with a motor-driven operator presenting said first-named surface, with a protective sheet of the unit stripped from the inner membrane surface and that surface adhered to said first-named operator surface.
Claim 5
Dependent Claim
45 words
The adapter unit of claim 2 as a circular disc unit applied in adhesive combination with a motor-driven operator presenting said first-named surface, with a protective sheet of the unit stripped from the inner membrane surface and that surface adhered to said first-named operator surface.
Claim 6
Dependent Claim
41 words
The combination of a unit in accordance with claim 1 as stripped of one of said protective sheets to expose said inner coated membrane surface, and a backing member to which said membrane is adherently secured at said inner surface thereof.
Claim 7
Dependent Claim
57 words
The combination of a unit in accordance with claim 1 as stripped of both of said protective sheets to expose said inner and outer coated membrane surfaces, a backing member to which said membrane is adherently secured at said inner surface thereof, and an abrasive sheet releasably secured adherently to said outer coated surface of said membrane.
Claim 8
Dependent Claim
31 words
The combination of claim 5, in which said backing member is a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond.
Claim 9
Dependent Claim
31 words
The combination of claim 6, in which said backing member is a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond.
Claim 10
Dependent Claim
232 words
The combination of a flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit comprising a temporary lamination of an intermediate flexible membrane and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, another pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a releasable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, said unit being adapted to be stripped of one of said protective sheets to expose said inner coated membrane surface, a backing member to which said membrane is adherently secured at said inner surface thereof, said backing member being a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond, the yieldable facing of said backing member comprising a foamed layer having a flexible facing sheet permanently secured on an outer surface, and a relatively rigid support member to which an inner surface of said foamed layer is relatively permanently secured.
Claim 11
Dependent Claim
232 words
The combination of a flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit comprising a temporary lamination of an intermediate flexible membrane and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, another pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a releasable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, said unit being adapted to be stripped of one of said protective sheets to expose said inner coated membrane surface, a backing member to which said membrane is adherently secured at said inner surface thereof, said backing member being a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond, the yieldable facing of said backing member comprising a foamed layer having a flexible facing sheet permanently secured on an outer surface, and a relatively rigid support member to which an inner surface of said foamed layer is relatively permanently secured.
Claim 12
Dependent Claim
248 words
The combination of a flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit comprising a temporary lamination of an intermediate flexible membrane and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, another pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a releasable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, said unit being adapted to be stripped of both of said protective sheets to expose said inner and outer coated membrane surfaces, a backing member to which said membrane is adherently secured at said inner surface thereof, an abrasive sheet releasably secured adherently to said outer coated surface of said membrane, said backing member being a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond, the yieldable facing of said backing member comprising a foamed layer having a flexible facing sheet permanently secured on an outer surface, and a relatively rigid support member to which an inner surface of said foamed layer is relatively permanently secured.
Claim 13
Dependent Claim
248 words
The combination of a flexible adapter unit for mounting an abrasive sheet on a surface of an operator for said sheet, said unit comprising a temporary lamination of an intermediate flexible membrane and a pair of flexible protective strip sheets having temporarily-adhered application respectively to inner and outer surfaces of said membrane, said application being through the agency of a pressure-sensitive adhesive coating pre-applied on the inner membrane surface, which coating when exposed and pressure-applied on said operator surface has a relatively strong but releasable bond to that surface, another pressure-sensitive adhesive coating pre-applied on the outer membrane surface, which last-named coating when exposed and pressure-applied to the abrasive sheet has a releasable bond to said abrasive sheet, the respective protective strip sheets being relatively readily peeled from said respective membrane coatings, said unit being adapted to be stripped of both of said protective sheets to expose said inner and outer coated membrane surfaces, a backing member to which said membrane is adherently secured at said inner surface thereof, an abrasive sheet releasably secured adherently to said outer coated surface of said membrane, said backing member being a yieldably faced one, at the facing of which said inner membrane coating has a relatively strong but releasable bond, the yieldable facing of said backing member comprising a foamed layer having a flexible facing sheet permanently secured on an outer surface, and a relatively rigid support member to which an inner surface of said foamed layer is relatively permanently secured.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |