US3897288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening method using polymer-based magnets
Assignee: 3M Co
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Filing: 1971-06-01
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Granted: 1975-07-29
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Expires: 1991-06-01
Abstract
Abstract Fasteners and fastening methods that concurrently apply magnetic forces and adhesive forces to fasten articles together. In a fastener of the invention, layers of a reactive adhesive are carried on exterior bonding faces of a magnetized polymer-based main body portion of the fastener. In other embodiments of the invention, a polymer-based magnet that may or may not carry exterior adhesive layers is placed between adjacent articles during a fastening operation to apply a magnetic force tending to draw the articles together and to apply pressure on adhesive material disposed between the articles.
Inventors
- 👤 Richard E Fayling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:58
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1546; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S52/00; Y10S52/04; Y10T; Y10T24/00; Y10T24/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A METHOD FOR FORMING A LONG NARROW ADHESIVE BOND FASTENING AT LEAST TWO MAGNETIZABLE ARTICLES TOGETHER COMPRISING 1) DISPOSING REACTIVE ADHESIVE MATERIAL BETWEEN THE ARTICLES THAT CURES TO FORM SAID ADHESIVE BOND, CONCURRENTLY 2) DISPOSING A DISCRETE FLEXIBLE SELF-SUPPORTING POLYMER-BASED MAGNET IN ELONGATED STRIP FORM ADJACENT A SUBSTANTIAL LENGTH OF THE ARTICLES AND ADJACENT BUT NOT BONDED TO A SUBSTANTIAL LENGTH OF THE ADHESIVE MATERIAL BETWEEN THE ARTICLES, 3) ARRANGING THE ARTICLES SO THAT PORTIONS OF THE ARTICLES ARE JOINED TO FORM A PHYSICAL LINK OF MAGNETIZABLE MATERIAL EXTENDING CONTINUOUSLY FROM ONE POLE TO THE OPPOSITE POLE OF THE MAGNET EXCEPT WHERE INTERRUPTED BY ADHESIVE MATERIAL, WHEREBY OPPOSITE MAGNETIC POLES OCCUR AT OPPOSITE SIDES OF THE ADHESIVE MATERIAL, MAGNETIC LINES OF FORCE ARE CONCENTRATED THROUGH THE ADHESIVE MATERIAL, AND A MAGNETICALLY STABLE ARRANGEMENT IS FORMED IN WHICH A MAGNETIC FORCE DRAWS THE ARTICLES TOWARD ONE ANOTHER TO PLACE THE ADHESIVE MATERIAL UNDER COMPRESSION, AND (4) REMOVING THE MAGNET FROM ITS POSITION AFTER THE ARTICLES ARE FASTENED TOGETHER.
Claim 2
Independent Claim
167 words
A METHOD FOR FORMING A LONG NARROW ADHESIVE BOND FASTENING AT LEAST TWO MAGNETIZABLE ARTICLES TOGETHER COMPRISING 1) DISPOSING REACTIVE ADHESIVE MATERIAL BETWEEN THE ARTICLES THAT CURES TO FORM SAID ADHESIVE BOND, CONCURRENTLY 2) DISPOSING A DISCRETE FLEXIBLE SELF-SUPPORTING POLYMER-BASED MAGNET IN ELONGATED STRIP FORM ADJACENT A SUBSTANTIAL LENGTH OF THE ARTICLES AND ADJACENT BUT NOT BONDED TO A SUBSTANTIAL LENGTH OF THE ADHESIVE MATERIAL BETWEEN THE ARTICLES, 3) ARRANGING THE ARTICLES SO THAT PORTIONS OF THE ARTICLES ARE JOINED TO FORM A PHYSICAL LINK OF MAGNETIZABLE MATERIAL EXTENDING CONTINUOUSLY FROM ONE POLE TO THE OPPOSITE POLE OF THE MAGNET EXCEPT WHERE INTERRUPTED BY ADHESIVE MATERIAL, WHEREBY OPPOSITE MAGNETIC POLES OCCUR AT OPPOSITE SIDES OF THE ADHESIVE MATERIAL, MAGNETIC LINES OF FORCE ARE CONCENTRATED THROUGH THE ADHESIVE MATERIAL, AND A MAGNETICALLY STABLE ARRANGEMENT IS FORMED IN WHICH A MAGNETIC FORCE DRAWS THE ARTICLES TOWARD ONE ANOTHER TO PLACE THE ADHESIVE MATERIAL UNDER COMPRESSION, AND (4) REMOVING THE MAGNET FROM ITS POSITION AFTER THE ARTICLES ARE FASTENED TOGETHER.
Claim 3
Dependent Claim
37 words
A method of claim 1 in which any surface of the magnet that will contact adhesive material during the fastening operation is covered with a layer of release material to which the adhesive material will not adhere.
Claim 4
Dependent Claim
27 words
A method of claim 1 in which the magnet is covered with a low-friction material to reduce the force required to draw the magnet along a substrate.
Claim 5
Dependent Claim
22 words
A method of claim 1 in which the magnet is positioned between at least portions of the two articles being adhered together.
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |