Patent US3840945A successfully refreshed from Google Patents.
US3840945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping fastening surface
Assignee: Individual
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Filing: 1972-12-01
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Granted: 1974-10-15
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Expires: 1992-12-01
Abstract
Abstract In making a self-gripping fastening surface of the type in which two articles are capable of gripping one another with a selfadhering action but which are releasable upon being forcibly pulled apart and separated, a plurality of elongated filamentlike elements or fibrils are cut from a sheet of flexible material and mounted in upstanding position on at least one of the articles to be attached. The free ends of the mounted fibrils are subjected to a treatment, for example by applying a source of heat thereto, capable of causing each of said free ends to bend and curl back on itself to form a terminal hook thereon, whereby when two like articles are pressed together, the hooks on one article will grip the hooks on the other article and vice versa to cause the two articles to become tightly fastened to one another, or the hooks on one article are caused to penetrate and grip the surface of a frangible article.
Inventors
- 👤 G Brumlik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:52
CPC Classifications
A; A44; A44B; A44B18/00; A44B18/0003; A44B18/0015; Y; Y10; Y10T; Y10T24/00; Y10T24/27; Y10T24/2708; Y10T24/275; Y10T24/2783; Y10T24/2792
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
179 words
A multi-element self-gripping fastening surface for releasably connecting together a pair of articles, said fastening surface comprising a resilient fastening assembly secured to a surface of at least one article to be releasably connected to an opposing article, said fastening assembly including a flat mounting strip and a plurality of elongated flat filaments formed integrally with said mounting strip and upstanding perpendicularly therefrom in a linear row along a longitudinal edge of said mounting strip, each of said filaments having opposed flat surfaces and a terminal hook at the free end thereof, said hook being bent perpendicularly to the plane of said flat surfaces, the body of each of said filaments having a molecular alignment in a direction parallel to the longitudinal axis of said body, said mounting strip being secured flat against the surface of said one article with said terminal hooks of said filaments exposed above said article surface to form said selfgripping fastening surface, and positioned to engage and grip a confronting surface of said opposing article when the latter is pressed against said self-gripping surface.
Claim 2
Dependent Claim
179 words
A multi-element self-gripping fastening surface for releasably connecting together a pair of articles, said fastening surface comprising a resilient fastening assembly secured to a surface of at least one article to be releasably connected to an opposing article, said fastening assembly including a flat mounting strip and a plurality of elongated flat filaments formed integrally with said mounting strip and upstanding perpendicularly therefrom in a linear row along a longitudinal edge of said mounting strip, each of said filaments having opposed flat surfaces and a terminal hook at the free end thereof, said hook being bent perpendicularly to the plane of said flat surfaces, the body of each of said filaments having a molecular alignment in a direction parallel to the longitudinal axis of said body, said mounting strip being secured flat against the surface of said one article with said terminal hooks of said filaments exposed above said article surface to form said selfgripping fastening surface, and positioned to engage and grip a confronting surface of said opposing article when the latter is pressed against said self-gripping surface.
Claim 3
Dependent Claim
46 words
A self-gripping fastening surface according to claim 1 in which each of said filaments has a substantially flat body having a sharp point at its free end thereof, said free end being bent to form said terminal hook with a sharp point at the end thereof.
Claim 4
Dependent Claim
54 words
A self-gripping fastening surface according to claim 1 in which each of said filaments has a substantially flat body in the form of a narrow elongated triangle defining a sharp point at its free end thereof, said free end being bent to form said terminal hook with a sharp point at the end thereof.
Claim 5
Dependent Claim
30 words
A self-gripping fastening surface according to claim 1 in which each of said filaments has a substantially flat body comprising a lamination of two plastic materials having different mechanical properties.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |