Patent US5879504A successfully refreshed from Google Patents.
US5879504A
Expired / Lapsed
US
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Portable apparatus for removing heat softenable surface coverings
Assignee: 3M Co
•
Filing: 1997-06-04
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Granted: 1999-03-09
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Expires: 2017-06-04
Abstract
Abstract A soft elastomeric disc for removal of polymeric compositions from an underlying substrate. The disc is useful for removing decorative decals, stripes, graphics, emblems, protective moldings, paint and adhesive and is made from a filled elastomeric composition. The elastomeric composition is filled with a system that combines an organic lubricant and a non-abrasive particulate.
Inventors
- 👤 Phillip M. Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:39
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/02; B24D13/12; B44; B44D; B44D3/00; B44D3/16; C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/34; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/19
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
89 words
An apparatus for removing an adhered heat softenable surface covering from the surface of a heat stable substrate without damage to the substrate comprising at least one disc made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a non-abrasive particulate, wherein the organic lubricant and the nonabrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition.
Claim 2
Independent Claim
89 words
An apparatus for removing an adhered heat softenable surface covering from the surface of a heat stable substrate without damage to the substrate comprising at least one disc made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a non-abrasive particulate, wherein the organic lubricant and the nonabrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 wherein the elastomeric composition has a Shore A hardness of about 10 to 90.
Claim 4
Dependent Claim
12 words
The apparatus of claim 1 wherein the apparatus comprises a single disc.
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
24 words
The apparatus of claim 4 wherein the at least one disc has a surface wear rate of at least about 0.2 g/min/16 mm length.
Claim 7
Dependent Claim
17 words
The apparatus of claim 1 wherein the disc has a thickness of about 2 to 25 mm.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein the at least one disc has a kinetic coefficient of friction of about 0.5 to 3.0.
Claim 9
Dependent Claim
18 words
The apparatus of claim 1 further including means for rotating the apparatus around a central axis of rotation.
Claim 10
Dependent Claim
24 words
The apparatus of claim 1 wherein the organic lubricant and the nonabrasive particulate are present in a weight ratio of about 8:1 to 1:8.
Claim 11
Dependent Claim
18 words
The apparatus of claim 1 wherein the non-abrasive particulate has a Mohs value of 1 to about 3.
Claim 12
Dependent Claim
18 words
The apparatus of claim 1 wherein the non-abrasive particulate comprises calcium carbonate, dextrin, talc or a mixture thereof.
Claim 13
Dependent Claim
11 words
The apparatus of claim 1 wherein the non-abrasive particulate comprises talc.
Claim 14
Dependent Claim
21 words
The apparatus of claim 1 wherein the non-abrasive particulate comprises particles having an average diameter of about 0.1 to 3 micrometers.
Claim 15
Dependent Claim
15 words
The apparatus of claim 1 wherein the organic lubricant comprises a polyethylene wax or paraffin.
Claim 16
Dependent Claim
23 words
The apparatus of claim 1 wherein the organic lubricant comprises a carboxylic acid having 10 to 50 carbon atoms or a derivative thereof.
Claim 17
Dependent Claim
18 words
The apparatus of claim 1 wherein the organic lubricant comprises a salt or an amide of stearic acid.
Claim 18
Dependent Claim
23 words
The apparatus of claim 1 wherein the organic lubricant comprises stearic acid, ethylene-bis-stearamide, lithium stearate, calcium stearate, aluminum stearate, or a mixture thereof.
Claim 19
Dependent Claim
12 words
The apparatus of claim 1 wherein the organic lubricant comprises lithium stearate.
Claim 20
Dependent Claim
12 words
The apparatus of claim 1 wherein the elastomer comprises a thermoplastic polymer.
Claim 21
Dependent Claim
27 words
The apparatus of claim 1 wherein the elastomer comprises an alkylenic or styrenic block copolymer; a polyester; a rubber; a polyamide; polyvinyl chloride; or a mixture thereof.
Claim 22
Dependent Claim
12 words
The apparatus of claim 1 wherein the elastomer comprises a thermoset polymer.
Claim 23
Dependent Claim
12 words
The apparatus of claim 1 wherein the elastomer comprises a crosslinked polyurethane.
Claim 24
Dependent Claim
9 words
The apparatus of claim 1 further comprising a plasticizer.
Claim 25
Dependent Claim
12 words
The apparatus of claim 1 wherein the plasticizer comprises an alkyl benzylphthalate.
Claim 26
Independent Claim
185 words
A method of removing an adhered heat softenable surface covering from a surface of a heat stable substrate substantially without damage to said substrate, the method comprising the steps of: (a) providing a rotatable body having a peripheral surface and being rotatable about its axis, said body comprising at least one disc made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a nonabrasive particulate wherein the organic lubricant and the non-abrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition; (b) rotating the rotatable body to provide a rotating body; (c) contacting a portion of said peripheral surface of said rotating body with said heat softenable surface covering to be removed, causing said surface covering to increase in temperature and thereafter forcibly removing said surface covering by said portion of said peripheral surface from said heat softenable substrate; and (d) attriting said peripheral surface of said rotating body by continued rotation thereof.
Claim 27
Independent Claim
185 words
A method of removing an adhered heat softenable surface covering from a surface of a heat stable substrate substantially without damage to said substrate, the method comprising the steps of: (a) providing a rotatable body having a peripheral surface and being rotatable about its axis, said body comprising at least one disc made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a nonabrasive particulate wherein the organic lubricant and the non-abrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition; (b) rotating the rotatable body to provide a rotating body; (c) contacting a portion of said peripheral surface of said rotating body with said heat softenable surface covering to be removed, causing said surface covering to increase in temperature and thereafter forcibly removing said surface covering by said portion of said peripheral surface from said heat softenable substrate; and (d) attriting said peripheral surface of said rotating body by continued rotation thereof.
Claim 28
Independent Claim
99 words
An apparatus for removing an adhered heat softenable surface covering from the surface of a heat stable substrate without damage to the substrate comprising at least one rotatable body having a peripheral surface wherein the rotatable body is made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a non-abrasive particulate, wherein the organic lubricant and the non-abrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition.
Claim 29
Independent Claim
99 words
An apparatus for removing an adhered heat softenable surface covering from the surface of a heat stable substrate without damage to the substrate comprising at least one rotatable body having a peripheral surface wherein the rotatable body is made of a filled elastomeric composition comprising an elastomer, about 2 to 43 wt-% of an organic lubricant selected from the group consisting of solid organic lubricants and polar organic lubricants and about 2 to 43 wt-% of a non-abrasive particulate, wherein the organic lubricant and the non-abrasive particulate together comprise about 4 to 45 wt-% of the filled elastomeric composition.
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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) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |