US5269874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable apparatus for removing heat softenable surface coverings
Assignee: 3M Co
•
Filing: 1992-08-26
•
Granted: 1993-12-14
•
Expires: 2012-08-26
Abstract
Abstract A soft elastomeric disc for removing polymeric compositions from an underlying substrate. The disc is useful for removing decorative decals, stripes, graphics, emblems, protective moldings, paint and adhesive.
Inventors
- 👤 Phillip M. Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:10
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/16; B24; B24D; B24D13/00; B24D13/02; B24D13/12; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/18; Y10T156/19
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
90 words
An apparatus for removing an adhered heat softenable surface covering from a surface of a heat stable substrate without damage to the substrate, comprising at least one flexible, foamed elastomeric disc, said elastomer selected so that said disc is capable of increasing the temperature of the surface covering to a temperature which diminishes the integrity of the surface covering when said disc is rotated about the central axis in frictional contact with the surface covering, and of forcibly removing the surface covering from the substrate after the increase in temperature.
Claim 2
Independent Claim
90 words
An apparatus for removing an adhered heat softenable surface covering from a surface of a heat stable substrate without damage to the substrate, comprising at least one flexible, foamed elastomeric disc, said elastomer selected so that said disc is capable of increasing the temperature of the surface covering to a temperature which diminishes the integrity of the surface covering when said disc is rotated about the central axis in frictional contact with the surface covering, and of forcibly removing the surface covering from the substrate after the increase in temperature.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1, wherein said elastomer has a Shore A hardness of between 10 to 90.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1, wherein the apparatus comprises a plurality of flexible, foamed elastomeric discs.
Claim 5
Dependent Claim
35 words
The apparatus of claim 1, wherein a portion of a peripheral surface of the at least one disc is attrited to provide a renewed peripheral surface of the disc for contact with the surface covering.
Claim 6
Dependent Claim
28 words
The apparatus of claim 4, wherein said at least one disc has a surface wear rate of at least about 0.1 grams per minute per 7 mm length.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1, wherein said elastomer is substantially free of particulate matter.
Claim 8
Dependent Claim
10 words
The apparatus of claim 1, wherein said elastomer includes plasticizer.
Claim 9
Dependent Claim
17 words
The apparatus of claim 1, wherein said disc has a thickness of between 1 to 2 mm.
Claim 10
Dependent Claim
19 words
The apparatus of claim 1, and further including means for rotating the apparatus around a central axis of rotation.
Claim 11
Dependent Claim
30 words
The apparatus of claim 9, wherein said rotating means comprises a rotary power tool having an output shaft on which said at least one disc is mounted for carriage thereby.
Claim 12
Dependent Claim
53 words
The apparatus of claim 1, wherein said elastomer is selected from the group consisting of plasticized polyvinyl chloride, alkylenic block copolymer, styrenic block copolymer, thermoplastic polyester, thermoplastic polyurethane, crosslinked natural rubber, ethylene-propylene elastomer, nitrile rubber, styrene/butadiene rubber, ethylene-propylene terpolymer rubber, thermoplastic polypropylene/ethylene-propylene copolymer blend, neoprene rubber, thermoplastic polyamide, copolymers thereof, and mixtures thereof.
Claim 13
Dependent Claim
25 words
The apparatus of claim 1, wherein said apparatus produces a peak temperature of less than about 160° C. when rotatatively contacted with the surface covering.
Claim 14
Dependent Claim
32 words
The apparatus of claim 3, further including rigid spacer discs at least between every third foamed elastomeric disc, said spacer discs having an outer diameter less than that of the elastomeric disc.
Claim 15
Dependent Claim
15 words
The apparatus of claim 13, including rigid spacer discs between each pair of elastomeric discs.
Claim 16
Independent Claim
92 words
An apparatus for removing an adhered heat softenable surface covering from a surface of a heat stable substrate without damage to the substrate, comprising at least two flexible, elastomeric discs in adjacent relationship, said elastomer selected so that said disc is capable of increasing the temperature of the surface covering to a temperature which diminishes the integrity of the surface covering when said disc is coated about the central axis in frictional contact with the surface covering, and of forcibly removing the surface covering from the substrate after the increase in temperature.
Claim 17
Independent Claim
92 words
An apparatus for removing an adhered heat softenable surface covering from a surface of a heat stable substrate without damage to the substrate, comprising at least two flexible, elastomeric discs in adjacent relationship, said elastomer selected so that said disc is capable of increasing the temperature of the surface covering to a temperature which diminishes the integrity of the surface covering when said disc is coated about the central axis in frictional contact with the surface covering, and of forcibly removing the surface covering from the substrate after the increase in temperature.
Claim 18
Dependent Claim
18 words
The apparatus of claim 15, wherein said elastomer has a Shore A hardness of between 10 to 90.
Claim 19
Dependent Claim
15 words
The apparatus of claim 15, wherein the apparatus comprises a plurality of flexible, elastomeric discs.
Claim 20
Dependent Claim
35 words
The apparatus of claim 15, wherein a portion of a peripheral surface of the at least two discs is attrited to provide a renewed peripheral surface of the disc for contact with the surface covering.
Claim 21
Dependent Claim
28 words
The apparatus of claim 18, wherein said at least one disc has a surface wear rate of at least about 0.1 grams per minute per 7 mm length.
Claim 22
Dependent Claim
14 words
The apparatus of claim 15, wherein said elastomer is substantially free of particulate matter.
Claim 23
Dependent Claim
10 words
The apparatus of claim 15, wherein said elastomer includes plasticizer.
Claim 24
Dependent Claim
17 words
The apparatus of claim 15, wherein said disc has a thickness of between 1 to 2 mm.
Claim 25
Dependent Claim
19 words
The apparatus of claim 15, and further including means for rotating the apparatus around a central axis of rotation.
Claim 26
Dependent Claim
29 words
The apparatus of claim 23, wherein said rotating means comprises a rotary power tool having an output on which said at least one disc is mounted for carriage thereby.
Claim 27
Dependent Claim
53 words
The apparatus of claim 15, wherein said elastomer is selected from the group consisting of plasticized polyvinyl chloride, alkylenic block copolymer, styrenic block copolymer, thermoplastic polyester, thermoplastic polyurethane, crosslinked natural rubber, ethylene-propylene elastomer, nitrile rubber, styrene/butadiene rubber, ethylene-propylene terpolymer rubber, thermoplastic polypropylene/ethylene-propylene copolymer blend, neoprene rubber, thermoplastic polyamide, copolymers thereof, and mixtures thereof.
Claim 28
Dependent Claim
25 words
The apparatus of claim 15, wherein said apparatus produced a peak temperature of less than about 160° C. when rotatatively contacted with the surface covering.
Claim 29
Dependent Claim
31 words
The apparatus of claim 15, further including rigid spacer discs at least between every third elastomeric disc, said spacer discs having an outer diameter less than that of the elastomeric disc.
Claim 30
Dependent Claim
15 words
The apparatus of claim 27, including rigid spacer discs between each pair of elastomeric discs.
References Cited (Backward Citations)
GB624928A
Cited
US2594647A
Cited
US2581567A
Cited
US2676160A
Cited
US2919180A
Cited
US3395417A
Cited
US3653858A
Cited
US3738951A
Cited
US4150955A
Cited
US3924362A
Cited
US3983047A
Cited
USB576859I5
Cited
US4055897A
Cited
US4133144A
Cited
US4335033A
Cited
DE3030351A1
Cited
US4836858A
Cited
US4809467A
Cited
US4951423A
Cited
US5123139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |