GB2363159A - Flexible magnetic strip - Google Patents
Flexible magnetic strip Download PDFInfo
- Publication number
- GB2363159A GB2363159A GB0109596A GB0109596A GB2363159A GB 2363159 A GB2363159 A GB 2363159A GB 0109596 A GB0109596 A GB 0109596A GB 0109596 A GB0109596 A GB 0109596A GB 2363159 A GB2363159 A GB 2363159A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- moulded
- strip
- flexible strips
- polarity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
- H01F7/0215—Flexible forms, sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
- H01F1/117—Flexible bodies
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Adhesive Tapes (AREA)
Abstract
For holding together flexible materials, such as roll-up display screens, edge-to-edge, very thin and narrow flexible magnetic strip (3) is co-moulded edge-to-edge with non-magnetic flexible strip (4), one face (7 or 5) of the combined strip (1 or 2) being suitable for the application of an adhesive, e.g. in the form of double-adhesive tape (8, 9), and the other face (5 or 7) being provided with indicator means for the polarity of the magnetic portions (3) e.g. different colouring pigments in the non-magnetic portions (4) of co-acting combined strips, or impressions such as a single continuous groove (6) for N-polarity and a pair of grooves (10) for S-polarity.
Description
2363159 FLEXIBLE MAGNETIC STRIP This invention relates to flexible
magnetic strip, more particularly of the type having such attraction and holding power that comparatively very thin and narrow strips (e.g. width of the order of 3.0 mm and thickness of the order of 1.0 mm) can attract 5 edge-to-edge.
While it is evident that such flexible magnetic strips would be useful in many applications where both flexibility and holding power are of great advantage, e.g., in releasably holding together flexible materials, such as roll-up display screens, edge-to edge, the problem is how to secure the strips to the flexible materials without creating 10 too much stiffness and identifying the relevant polarity The object of the present invention is to provide a solution to these problems.
According to the present invention, very thin and narrow flexible magnetic strip is co-moulded edge-to-edge with non-magnetic flexible strip, one face of the combined strip is suitable for the application of an adhesive, and the other face is provided with 15 indicator means for the polarity of the magnetic portion. The non- magnetic strip may be of greater width than the magnetic strip, an example of a suitable width of non magnetic strip being 5.0 mm.
The adhesive may be one side of double-adhesive tape applied to the co moulded strip subsequent to extrusion from the mould.
20 The indicator means may comprise colouring pigment in the non-magnetic portion of the co-moulded strip distinct from the colour of the magnetic portion; and different colours can be used to indicate the different polarities of do- acting strips.
Alternatively, the indicator means may comprise impressions in the nonmagnetic portion of the co-moulded strip, such as a continuous groove or grooves formed during 2 extrusion, for example, a single groove for N-polarity and a pair of grooves for S polarity.
Co-acting embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawing which is a greatly enlarged 5 diagrammatic cross-section (not to scale) through co-acting strips.
The drawing shows two strips 1, 2 each co-moulded with a narrower portion 3 of flexible magnetic material and a wider portion 4 of non-magnetic flexible material.
One face 5 of the portion 4 of strip 1 has a single groove 6 in it to identify its N-polarity, and the other face 7 carries double-adhesive tape 8 whereby the strip 1 can be 10 adhered to one side of, say, a roll-up display screen (not shown) after removal of a releasable cover strip 9. The other strip 2, on the other hand, has two grooves 10 in its face 7 to identify its S-polarity, and its face 5 carries double- adhesive tape 8 whereby the strip 2 can be adhered to one side of, say, another roll-up display screen (also not shown) after removal of its releasable cover strip 9, thus enabling the two 15 strips 1, 2 to be used to hold together edge-to-edge the two screens.
Alternatively, as mentioned above, identification of the polarities of the strips 1, 2 may be effected by incorporating different colour pigments in their respective wider portions 4; but the advantage in using grooves 6, 10 lies in being able to use a non coloured binder such as that used in the magnetic portion of the co- moulding.
3
Claims (9)
1. Very thin and narrow flexible magnetic strip co-moulded edge-to-edge with non-magnetic flexible strip, one face of the combined strip being suitable for the application of an adhesive, and the other face being provided with indicator means for 5 the polarity of the magnetic portion.
2. Co-moulded magnetic and non-magnetic flexible strips as in Claim 1, wherein the non-magnetic strip is of greater width than the magnetic strip.
3. Co-moulded magnetic and non-magnetic flexible strips as in Claim 1 or Claim 2, wherein the adhesive is one side of double-adhesive tape applied to the co 10 moulded strip subsequent to extrusion from the mould.
4. Co-moulded magnetic and non-magnetic flexible strips as in any one of Claims 1 to 3, wherein the indicator means comprises colouring pigment in the non magnetic portion of the co-moulded strip distinct from the colour of the magnetic portion.
15
5. Co-moulded magnetic and non-magnetic flexible strips as in Claim 4, wherein different colours are used to indicate the different polarities of co-acting strips.
6. Co-moulded magnetic and non-magnetic flexible strips as in any one of Claims 1 to 3, wherein the indicator means comprises impressions in the non-magnetic portion of the co-moulded strip.
20
7. Co-moulded magnetic and non-magnetic flexible strips as in Claim 6, wherein the indicator means comprises a continuous groove or grooves formed during extrusion.
8. Co-moulded magnetic and non-magnetic flexible strips as in Claim 7 with a single groove for N-polarity and a pair of grooves for S-polarity.
9. Co-moulded magnetic and non-magnetic flexible strips substantially as hereinbefore described with reference to the accompanying drawing.
9. Co-moulded magnetic and non-magnetic flexible strips substantially as hereinbefore described with reference to the accompanying drawing.
S Amendments to the claims have been filed as follows CLAIMS 1. Flexible magnetic strip with width of the order of 3.0 mm and thickness of the order of 1.0 mm co-moulded edge-to-edge with non-magnetic flexible strip, one face of the combined strip being available for the application of an adhesive, and the other face 5 being provided with indicator means for the polarity of the magnetic portion.
2. Co-moulded magnetic and non-magnetic flexible strips as in Claim 1, wherein the non-magnetic strip is of greater width than the magnetic strip.
3. Co-moulded magnetic and non-magnetic flexible strips as in Claim 1 or Claim 2, wherein the adhesive is one side of double-adhesive tape applied to the co 10 moulded strip subsequent to extrusion from the mould.
4. Co-moulded magnetic and non-magnetic flexible strips as in any one of Claims 1 to 3, wherein the indicator means comprises colouring pigment in the non magnetic portion of the co-moulded strip distinct from the colour of the magnetic portion.
15 5. Co-moulded magnetic and non-magnetic flexible strips as in Claim 4, wherein different colours are used to indicate the different polarities of co-acting strips.
6. Co-moulded magnetic and non-magnetic flexible strips as in any one of Claims 1 to 3, wherein the indicator means comprises impressions in the non-magnetic portion of the co-moulded strip.
20 7. Co-moulded magnetic and non-magnetic flexible strips as in Claim 6, wherein the indicator means comprises a continuous groove or grooves formed during extrusion.
8. Co-moulded magnetic and non-magnetic flexible strips as in Claim 7 with a single groove for N-polarity and a pair of grooves for S-polarity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0109596A GB2363159B (en) | 2000-06-09 | 2001-04-19 | Flexible magnetic strip |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0013965.9A GB0013965D0 (en) | 2000-06-09 | 2000-06-09 | Flexible magnetic strip |
GB0109596A GB2363159B (en) | 2000-06-09 | 2001-04-19 | Flexible magnetic strip |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0109596D0 GB0109596D0 (en) | 2001-06-06 |
GB2363159A true GB2363159A (en) | 2001-12-12 |
GB2363159B GB2363159B (en) | 2002-08-28 |
Family
ID=26244446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0109596A Expired - Fee Related GB2363159B (en) | 2000-06-09 | 2001-04-19 | Flexible magnetic strip |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2363159B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2632124A1 (en) * | 2012-02-24 | 2013-08-28 | Research In Motion Limited | Edge closure cover |
US8662298B2 (en) | 2012-02-24 | 2014-03-04 | Blackberry Limited | Magnetic edge closure cover |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124725A (en) * | 1964-03-10 | Flexible plastic permanent magnets | ||
US3191106A (en) * | 1959-12-24 | 1965-06-22 | Baermann Max | Rubber-like permanent magnet article and manufacture of same |
-
2001
- 2001-04-19 GB GB0109596A patent/GB2363159B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124725A (en) * | 1964-03-10 | Flexible plastic permanent magnets | ||
US3191106A (en) * | 1959-12-24 | 1965-06-22 | Baermann Max | Rubber-like permanent magnet article and manufacture of same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2632124A1 (en) * | 2012-02-24 | 2013-08-28 | Research In Motion Limited | Edge closure cover |
US8662298B2 (en) | 2012-02-24 | 2014-03-04 | Blackberry Limited | Magnetic edge closure cover |
Also Published As
Publication number | Publication date |
---|---|
GB2363159B (en) | 2002-08-28 |
GB0109596D0 (en) | 2001-06-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20130419 |