US4784890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener assembly with peripheral temporary attachment layer
Assignee: 3M Co
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Filing: 1987-10-16
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Granted: 1988-11-15
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Expires: 2007-10-16
Abstract
Abstract An elongate fastener assembly comprising an elongate flexible polymeric backing strip from which project a multiplicity of headed stems adapted to engage loops on materials pressed against the heads, and an open porous permanent attachment layer attached to the surface of the backing strip opposite the stems which has sufficient open area to receive foam to permanently attach the fastener assembly to a foamed article. The fastener assembly has a temporary attachment layer comprising granular ferromagnetic material along both sides of the backing strip, which temporary attachment layer is adapted to be attracted by magnets to temporarily hold the fastener assembly in position during a foaming process and restrict the foam from contacting the headed stems.
Inventors
- 👤 Philip D. Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/58; B60N2/5891; A; A44; A44B; A44B18/00; A44B18/0069; A44B18/0076; A44B18/0092; B29; B29C; B29C33/00; B29C33/12; B29C33/14; B29C33/16; B29C44/00; B29C44/02; B29C44/12; B29C44/1271; B29C70/00; B29C70/68; B60N2/5816; B60N2/5833; A44D; A44D2203/00; B29L; B29L2031/00; B29L2031/58; B29L2031/751; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T24/00; Y10T24/27; Y10T24/2708; Y10T24/2717; Y10T24/2725; Y10T428/00; Y10T428/24; Y10T428/24008; Y10T428/24017; Y10T428/24174; Y10T428/24182; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
266 words
An elongate fastener assembly comprising: an elongate polymeric backing strip having first and second major surfaces; a multiplicity of stems each secured at one end to said backing strip, projecting generally normally to the first surface of said backing strip, and having enlarged heads at their ends opposite said backing strip exposed externally of said fastener assembly and adapted to engage loops on material pressed against said heads; an open porous permanent attachment layer attached to the second major surface of said backing strip, said permanent attachment layer having sufficient open areas to afford movement of foam into said permanent attachment layer to permanently attach said fastener assembly to a foamed article; a flexible temporary attachment layer comprising granular ferromagnetic material adapted to be attracted by magnets in a mold to temporarily hold said fastener assembly in position in the mold during the foaming process, said temporary attachment layer extending along opposite sides of the first major surface of the backing strip to afford a foam tight seal between the temporary attachment layer and the mold on opposite sides of the backing strip; and means extending across the ends of said backing strip for restricting foam from passing between the opposite ends of the fastener assembly and the mold so that engagement of said temporary attachment layer on opposite sides of the backing strip with a mold under the influence of magnets in the mold and said means extending across the ends of said backing strip can prevent foam from moving into spaces around the heads and stems of the fastener assembly during the molding process.
Claim 2
Dependent Claim
266 words
An elongate fastener assembly comprising: an elongate polymeric backing strip having first and second major surfaces; a multiplicity of stems each secured at one end to said backing strip, projecting generally normally to the first surface of said backing strip, and having enlarged heads at their ends opposite said backing strip exposed externally of said fastener assembly and adapted to engage loops on material pressed against said heads; an open porous permanent attachment layer attached to the second major surface of said backing strip, said permanent attachment layer having sufficient open areas to afford movement of foam into said permanent attachment layer to permanently attach said fastener assembly to a foamed article; a flexible temporary attachment layer comprising granular ferromagnetic material adapted to be attracted by magnets in a mold to temporarily hold said fastener assembly in position in the mold during the foaming process, said temporary attachment layer extending along opposite sides of the first major surface of the backing strip to afford a foam tight seal between the temporary attachment layer and the mold on opposite sides of the backing strip; and means extending across the ends of said backing strip for restricting foam from passing between the opposite ends of the fastener assembly and the mold so that engagement of said temporary attachment layer on opposite sides of the backing strip with a mold under the influence of magnets in the mold and said means extending across the ends of said backing strip can prevent foam from moving into spaces around the heads and stems of the fastener assembly during the molding process.
Claim 3
Dependent Claim
14 words
An elongate fastener according to claim 1 wherein said ferromagnetic material comprises iron particles.
Claim 4
Dependent Claim
290 words
An elongate fastener assembly comprising: an elongate polymeric backing strip having first and second major surfaces; a multiplicity of stems each secured at one end to said backing strip, projecting generally normally to the first surface of said backing strip, and having enlarged heads at their ends opposite said backing strip exposed externally of said fastener assembly and adapted to engage loops on material pressed against said heads; an open porous permanent attachment layer attached to the second major surface of said backing strip, said permanent attachment layer comprising a base layer and a plurality of monofilaments sewn through said base layer and forming loops projecting from the base layer, said loops providing sufficient open areas to afford movement of foam into said permanent attachment layer to permanently attach said fastener assembly to a foamed article; a flexible temporary attachment layer comprising granular ferromagnetic material adapted to be attracted by magnets in a mold to temporarily hold said fastener assembly in position in the mold during the foaming process, said temporary attachment layer extending along opposite sides of the first major surface of the backing strip to afford a foam tight seal between the temporary attachment layer and the mold on opposite sides of the backing strip; and means extending across the ends of said backing strip for restricting foam from passing between the opposite ends of the fastener assembly and the mold so that engagement of said temporary attachment layer on opposite sides of the backing strip with a mold under the influence of magnets in the mold and said means extending across the ends of said backing strip can prevent foam from moving into spaces around the heads and stems of the fastener assembly during the molding process.
Claim 5
Dependent Claim
290 words
An elongate fastener assembly comprising: an elongate polymeric backing strip having first and second major surfaces; a multiplicity of stems each secured at one end to said backing strip, projecting generally normally to the first surface of said backing strip, and having enlarged heads at their ends opposite said backing strip exposed externally of said fastener assembly and adapted to engage loops on material pressed against said heads; an open porous permanent attachment layer attached to the second major surface of said backing strip, said permanent attachment layer comprising a base layer and a plurality of monofilaments sewn through said base layer and forming loops projecting from the base layer, said loops providing sufficient open areas to afford movement of foam into said permanent attachment layer to permanently attach said fastener assembly to a foamed article; a flexible temporary attachment layer comprising granular ferromagnetic material adapted to be attracted by magnets in a mold to temporarily hold said fastener assembly in position in the mold during the foaming process, said temporary attachment layer extending along opposite sides of the first major surface of the backing strip to afford a foam tight seal between the temporary attachment layer and the mold on opposite sides of the backing strip; and means extending across the ends of said backing strip for restricting foam from passing between the opposite ends of the fastener assembly and the mold so that engagement of said temporary attachment layer on opposite sides of the backing strip with a mold under the influence of magnets in the mold and said means extending across the ends of said backing strip can prevent foam from moving into spaces around the heads and stems of the fastener assembly during the molding process.
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) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |