US5852854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug for closing any opening and method of manufacturing this plug
Assignee: Rapid SA
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Filing: 1996-03-20
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Granted: 1998-12-29
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Expires: 2016-03-20
Abstract
Abstract The invention relates to an obturating stopper plug as well as to a method of manufacture of this stopper plug. The stopper plug for obturating any opening (2) and comprising a bead of heat-fusible adhesive (7) deposited upon the said stopper plug is characterized in that the bead of heat-fusible adhesive (7) comprises: (a) an adhesive mixture, (b) a cross-linking agent, (c) an expansion agent decomposing at a temperature close to the cross-linking temperature of the adhesive mixture (a), (d) additives for working purposes. The invention is applicable to the obturation, for example, of an opening in a plate to be passed into a drying oven for paint.
Inventors
- 👤 Jean-Michael Pierrot
- 👤 Jean-Pierre Leon
- 👤 Philippe Vigouroux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1228; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/483; B29C65/485; B29C65/4865; B29C65/56; B29C65/58; B29C65/72; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/12; B29C66/124; B29C66/1244; B29C66/12441; B29C66/1246; B29C66/12469; B29C66/40; B29C66/47; B29C66/474; B62; B62D; B62D25/00; B62D25/24; B65; B65D; B65D39/00; B65D39/04; B29C66/32; B29C66/322; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/943; Y10T; Y10T24/00; Y10T24/30; Y10T24/309; Y10T24/45; Y10T24/45225; Y10T24/45471; Y10T24/45524; Y10T24/45545; Y10T24/45581; Y10T428/00; Y10T428/21; Y10T428/214; Y10T428/215; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
132 words
A plug for obturating an opening defined by an edge of a plate, the stopper plug comprising: a surface having a dimension larger than the opening; hooking lugs projecting from said surface for hooking said plug to the edge of the plate from inside the opening; an annular groove between a free edge of the surface and the hooking lugs; and a bead of a heat-fusible adhesive embedded in said annular groove and comprising: (a) an adhesive mixture comprising a material selected from the group consisting of a terpolymer of ethylene/acrylic ester/maleic anhydride, a maleic anhydride-grafted copolymer of ethylene/acrylic ester, and combinations thereof, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 2
Dependent Claim
132 words
A plug for obturating an opening defined by an edge of a plate, the stopper plug comprising: a surface having a dimension larger than the opening; hooking lugs projecting from said surface for hooking said plug to the edge of the plate from inside the opening; an annular groove between a free edge of the surface and the hooking lugs; and a bead of a heat-fusible adhesive embedded in said annular groove and comprising: (a) an adhesive mixture comprising a material selected from the group consisting of a terpolymer of ethylene/acrylic ester/maleic anhydride, a maleic anhydride-grafted copolymer of ethylene/acrylic ester, and combinations thereof, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 3
Dependent Claim
61 words
The plug according to claim 1, wherein the adhesive mixture comprises between 5% and 40% by weight of acrylic ester on the basis of the total weight of the terpolymer or grafted copolymer, between 0.3% and 5% by weight of maleic anhydride based on the total weight of the terpolymer or grafted copolymer, the balance of said adhesive mixture being ethylene.
Claim 4
Dependent Claim
23 words
The plug according to claim 1 wherein the terpolymer or maleic anhydride-grafted copolymer has a melt index between 2 and 400 g/10 mn.
Claim 5
Dependent Claim
26 words
The plug according to claim 1 wherein the expansion agent is between 0.1 and 30 weight % of the total weight of the bead of adhesive.
Claim 6
Dependent Claim
26 words
The plug according to claim 1 wherein the expansion agent is between 1.5% and 5% by weight of the total weight of the bead of adhesive.
Claim 7
Dependent Claim
101 words
A plug for obturating an opening defined by an edge of a plate, the plug comprising: a surface comprising a dimension larger than a dimension of the opening; hooking lugs projecting from said surface for hooking the plug to the edge of the plate from inside the opening; an annular groove on said hooking lugs; and a bead of heat-fusible adhesive embedded in the annular groove and comprising: (a) an adhesive mixture, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 8
Dependent Claim
101 words
A plug for obturating an opening defined by an edge of a plate, the plug comprising: a surface comprising a dimension larger than a dimension of the opening; hooking lugs projecting from said surface for hooking the plug to the edge of the plate from inside the opening; an annular groove on said hooking lugs; and a bead of heat-fusible adhesive embedded in the annular groove and comprising: (a) an adhesive mixture, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 9
Dependent Claim
35 words
The plug according to claim 6 wherein the adhesive mixture comprises a material selected from the group consisting of a terpolymer of ethylene/acrylic ester/maleic anhydride, a maleic anhydride-grafted copolymer of ethylene/acrylic ester, and combinations thereof.
Claim 10
Dependent Claim
60 words
The plug according to claim 7 wherein the adhesive mixture comprises between 5% and 40% by weight of acrylic ester based on the total weight of the terpolymer or the grafted copolymer, between 0.3% and 5% by weight of maleic anhydride based on the total weight of the terpolymer or grafted copolymer, the balance of said adhesive mixture being ethylene.
Claim 11
Dependent Claim
23 words
The plug according to claim 7 wherein the terpolymer or maleic anhydride-grafted copolymer has a melt index between 2 and 400 g/10 mn.
Claim 12
Independent Claim
156 words
A method of manufacturing a plug for obturating an opening defined by an edge of a plate, the method comprising: injection molding a structure and a heat-fusible bead of adhesive in the same mold in two successive injections, wherein said injection molding of said bead of adhesive occurs at a temperature lower than a decomposition temperature of an expansion agent in said adhesive, and wherein the structure comprises: a surface comprising a dimension larger than a dimension of the opening, hooking lugs protecting from said surface for hooking the plug to the edge of the plate from inside the opening, and an annular groove on said hooking lugs; and wherein the bead of heat-fusible adhesive is embedded in the annular groove and comprises: (a) an adhesive mixture, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 13
Independent Claim
156 words
A method of manufacturing a plug for obturating an opening defined by an edge of a plate, the method comprising: injection molding a structure and a heat-fusible bead of adhesive in the same mold in two successive injections, wherein said injection molding of said bead of adhesive occurs at a temperature lower than a decomposition temperature of an expansion agent in said adhesive, and wherein the structure comprises: a surface comprising a dimension larger than a dimension of the opening, hooking lugs protecting from said surface for hooking the plug to the edge of the plate from inside the opening, and an annular groove on said hooking lugs; and wherein the bead of heat-fusible adhesive is embedded in the annular groove and comprises: (a) an adhesive mixture, (b) a peroxide cross-linking agent, (c) an azodicarbonamide expansion agent decomposing at a temperature close to a cross-linking temperature of the adhesive mixture, and (d) additives for working purposes.
Claim 14
Dependent Claim
18 words
The method of claim 10 comprising expanding said bead of adhesive after injection molding said bead of adhesive.
Claim 15
Dependent Claim
11 words
The method of claim 11 comprising cross-linking said bead of adhesive.
Claim 16
Dependent Claim
20 words
The method of claim 11 including expanding said bead of adhesive at between about 120 and about 200 degrees Celsius.
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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) | 2001-12-28 | 2002-06-29 | 2002-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-28 | 2006-06-29 | 2006-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-28 | 2010-06-29 | 2010-12-29 | $7700.00 | Window Closed / Lapsed |