Patent US4761318A successfully refreshed from Google Patents.
US4761318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop fastener portion with thermoplastic resin attaching and anchoring layer
Assignee: 3M Co
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Filing: 1986-08-29
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Granted: 1988-08-02
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Expires: 2006-08-29
Abstract
Abstract A loop fastener portion including a soft flexible sheet-like fibrous structure having a multiplicity of loops along a first surface adapted to be releasably engaged by a mating fastener portion, and a layer of thermoplastic resin adhered to a second major surface of the fibrous structure which anchors the loops in the fibrous structure and is softenable by the application of heat to adhere the fastener portion to a substrate such as the surface of a disposable diaper.
Inventors
- 👤 Ronald L. Ott
- 👤 Susan K. Nestegard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:55
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/02; A; A44; A44B; A44B18/00; A44B18/0003; A44B18/0011; A44B18/0069; A44B18/0073; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/24; Y10T428/24008; Y10T428/24017
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A structure comprising: a substrate; and a loop portion for a hook and loop fastener, said loop portion including: a flexible sheet-like fibrous structure comprising a nonwoven layer having first and second major surfaces and a multiplicity of loops along said first surface adapted to be releasably engaged by the hook portion of the fastener, said nonwoven layer along having insufficient internal strength to adequately anchor the loops for use as the loop portion of a hook and loop fastener; and a layer of thermoplastic resin adhered to the second major surface of said fibrous structure, said thermoplastic resin bonding together said fibrous structure to add sufficient internal strength and integrity to the fastener portion and anchoring of said loops to afford use of said loop fastener portion as the loop portion of a hook and loop fastener, and adhering said loop fastener portion to said substrate.
Claim 2
Dependent Claim
147 words
A structure comprising: a substrate; and a loop portion for a hook and loop fastener, said loop portion including: a flexible sheet-like fibrous structure comprising a nonwoven layer having first and second major surfaces and a multiplicity of loops along said first surface adapted to be releasably engaged by the hook portion of the fastener, said nonwoven layer along having insufficient internal strength to adequately anchor the loops for use as the loop portion of a hook and loop fastener; and a layer of thermoplastic resin adhered to the second major surface of said fibrous structure, said thermoplastic resin bonding together said fibrous structure to add sufficient internal strength and integrity to the fastener portion and anchoring of said loops to afford use of said loop fastener portion as the loop portion of a hook and loop fastener, and adhering said loop fastener portion to said substrate.
Claim 3
Dependent Claim
18 words
A structure according to claim 1 wherein said substrate is the polymeric outer layer of a disposable diaper.
Claim 4
Independent Claim
144 words
A method for forming a loop portion for a hook and loop fastener comprising: providing a soft flexible sheet-like fibrous structure comprising a nonwoven layer having first and second major surfaces and a multiplicity of loops along its first surface adapted to be releasably engaged by the hook portion of the fastener, which nonwoven layer alone has insufficient internal strength to adequately anchor the loops for use as the loop portion of a hook and loop fastener; extruding a layer of thermoplastic resin onto the second major surface of said fibrous structure sufficient to bond together the fibrous structure and to add sufficient internal strength and integrity to the fastener portion and anchoring of the loops to afford use of the loop fastener portion with the hook portion of a hook and loop fastener; and adhering the layer of thermoplastic resin to a substrate.
Claim 5
Independent Claim
144 words
A method for forming a loop portion for a hook and loop fastener comprising: providing a soft flexible sheet-like fibrous structure comprising a nonwoven layer having first and second major surfaces and a multiplicity of loops along its first surface adapted to be releasably engaged by the hook portion of the fastener, which nonwoven layer alone has insufficient internal strength to adequately anchor the loops for use as the loop portion of a hook and loop fastener; extruding a layer of thermoplastic resin onto the second major surface of said fibrous structure sufficient to bond together the fibrous structure and to add sufficient internal strength and integrity to the fastener portion and anchoring of the loops to afford use of the loop fastener portion with the hook portion of a hook and loop fastener; and adhering the layer of thermoplastic resin to a substrate.
Claim 6
Dependent Claim
63 words
A method according to claim 3 further including the steps of: allowing the layer of thermoplastic resin to cool after said extruding step and before said adhering step; and said adhering step includes softening the layer of thermoplastic resin by the application of heat and pressing the softened layer of thermoplastic resin against the substrate to adhere the fastener portion to the substrate.
Claim 7
Dependent Claim
17 words
A method according to claim 3 wherein said adhering step is performed simultaneously with said extruding step.
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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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |