GB2363159A - Flexible magnetic strip - Google Patents

Flexible magnetic strip Download PDF

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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
Application number
GB0109596A
Other versions
GB0109596D0 (en
GB2363159B (en
Inventor
Simon John Lee
Michael Eric Burton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANCHOR MAGNETS Ltd
Original Assignee
ANCHOR MAGNETS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GBGB0013965.9A external-priority patent/GB0013965D0/en
Application filed by ANCHOR MAGNETS Ltd filed Critical ANCHOR MAGNETS Ltd
Priority to GB0109596A priority Critical patent/GB2363159B/en
Publication of GB0109596D0 publication Critical patent/GB0109596D0/en
Publication of GB2363159A publication Critical patent/GB2363159A/en
Application granted granted Critical
Publication of GB2363159B publication Critical patent/GB2363159B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

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.
GB0109596A 2000-06-09 2001-04-19 Flexible magnetic strip Expired - Fee Related GB2363159B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
GB0109596D0 (en) 2001-06-06
GB2363159B (en) 2002-08-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20130419