EP0152147A2 - Elastische Magnetklemme - Google Patents

Elastische Magnetklemme Download PDF

Info

Publication number
EP0152147A2
EP0152147A2 EP85200156A EP85200156A EP0152147A2 EP 0152147 A2 EP0152147 A2 EP 0152147A2 EP 85200156 A EP85200156 A EP 85200156A EP 85200156 A EP85200156 A EP 85200156A EP 0152147 A2 EP0152147 A2 EP 0152147A2
Authority
EP
European Patent Office
Prior art keywords
strips
panels
clamp
panel
edge
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
EP85200156A
Other languages
English (en)
French (fr)
Other versions
EP0152147B1 (de
EP0152147A3 (en
Inventor
Maarten Jan Van Kuik
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.)
van Kuik Maarten Jan
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0152147A2 publication Critical patent/EP0152147A2/de
Publication of EP0152147A3 publication Critical patent/EP0152147A3/en
Application granted granted Critical
Publication of EP0152147B1 publication Critical patent/EP0152147B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F1/00—Cardboard or like show-cards of foldable or flexible material
    • G09F1/10—Supports or holders for show-cards
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
    • A47G1/16—Devices for hanging or supporting pictures, mirrors, or the like
    • A47G1/17—Devices for hanging or supporting pictures, mirrors, or the like using adhesives, suction or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F9/00—Filing appliances with devices clamping file edges; Covers with clamping backs

Definitions

  • the present invention relates to a magnetic clamp having clamping faces, each including a flexible synthetic plastics foil panel with embedded parallel strips of magnetic material, said strips having alternating polarities, and said panels being interconnected for -movement between an open position and a clamping position in such a manner that in the clamping position, opposite strips of magnetic material have opposite polarities.
  • Such a clamp is described in US patent 4,258,493 and comprises a flexible backing band to which the panels with embedded magnetic strips are secured in spaced relationship.
  • the intermediate portion of the backing band is bent to a U-shape for opposing the two panels, thereby enclosing an object to be fixed.
  • the mutual magnetic attraction of the two panels will then ensure sufficient surface pressure on the clamped object so as to prevent the object from slipping out of the clamp to an extent sufficient for normal use.
  • clamping effect of such a flexible magnetic clamp is relatively substantial, since, in contrast to non-flexible mechanical clamps, the clamping force is not exerted on the panels by a separate force-applying means, such as a spring, but the clamping force is produced in the material proper, and this throughout the entire surface of the two panels.
  • a drawback of the device disclosed in US patent 4,258,493 is that it is always necessary to take care that the panels lie in the proper relative opposite positions. Even a slight relative displacement transverse to the longitudinal direction of the magnetized strips, which is possible owing to the flexibility of the backing band, may cause magnetized strips of equal polarity to become opposed, so that the clamping faces repel instead of attract each other.
  • Another drawback of the use of a backing band is that no optimum use can be made of the flexibility of the synthetic plastics foil panels, for, if only because of its greater thickness, the assembly of panel and backing band is less flexible than a flexible panel alone.
  • the foil panels of the clamp according to the present invention have a fixed relative position by being locally attached to each other. No use is made of a backing band.
  • the foil panels proper form the clamping faces of the clamp and can be provided at their distal sides directly with a print and/or an adhesive layer for attachment of the clamp to a wall and the like.
  • the flexible magnetic clamp may comprise two substantially equally large foil panels fixed along one edge relatively to one another, the strips of magnetized material extending substantially at right angles to the fixed edge.
  • the clamp Since in the clamp according to the present invention, the panels are locally interconnected, the clamp has a paperclip effect, i.e. when either panel is lifted the interspace tapers in the direction of the fixed edge, so that the edge of an object pushed into the clamp can already be clamped in the narrow portion.
  • the opened clamp is released the bent portions will move towards each other initially exclusively under the influence of the resiliency inherent in the synthetic plastics material until the facing sides of the panels have approached each other so closely that the respective magnetic fields influence each other, thereby closing the clamp visibly faster.
  • the clamps according to the present invention may be very thin, i.e. in the order of 1.5 mm, and be made self-adhesive in a simple manner and moreover are resistant to moisture and corrosion, they are excellently suitable for fixing temporarily, even on uneven surfaces, various paper articles, such as memorandums, drafts, window bills, posters, notices and the like in shops, stores, offices, motor-cars, caravans and the like.
  • clamps may be made in various foil thicknesses, thicker foils being adapted to contain more magnetizable material, and hence to exert a greater clamping force per unit of surface area.
  • the two panels constituting the clamp may be locally fixed relatively to each other, thereby enclosing an abutment forming a contacting edge, said abutment having a thickness in the order of that of the material for which the clamp is designed.
  • the abutment moreover facilitates the positioning of an article in such a clamp.
  • a particular application of the present invention is a map or chart holder comprising a lower panel and a flexible, transparent upper panel connected at one edge by a clamp according to the present invention and being each provided at the opposite edge with coacting bandsof flexible foil with embedded strips of magnetized material, the polarities alternating in the successive strips.
  • a leaf-shaped article such as a map or sea chart, can be interposed between the panels and since the alternating polarities of the opposite strips of magnetized material prevent any shift of the upper panel relatively to the lower panel, the transparent upper panel is always retained in tight condition over the map.
  • the upper panel may consist of material on which can be written, such as polycarbonate or transparent polystyrene in matted design, allowing notes to be made and positions to be indicated on a clamped map or chart without the risk of navigation errors as a result of a shift of the map or chart underneath the upper panel.
  • Panels 1, 2 are made of a flexible synthetic plastics material, e.g. modified polyethylene, and have embedded therein, at an interspace of e.g. 2 mm, strips 3, 4 of magnetizable material such as barium ferrite or strontium ferrite.
  • each strip 3 of the panel 2 is opposed to a magnetic strip 4 in the panel 1 and vice versa.
  • the visible surface of the clamp may be coated with a vinyl layer in any color desired and may, at choice be provided with text or representations.
  • the abutment 13 may be formed by an adhesive layer whose thickness is chosen to suit the contemplated use of the clamp, i.e. in the order of the thickness of the material to be clamped therein, so that when the material is clamped between them, the panels 1, 2 extend as much as possible in mutually parallel relationship, ensuring an optimum clamping effect.
  • Fig. 2 shows a map or chart holder having a rigid lower panel 5 and a flexible upper panel 6. Panels 5, 6 are hinged together at one of their edges and in the position shown, two opposite edges are provided with magnetic foil bands 7, 8 and 9,10, respectively.
  • a clamped sheet 11, e.g. a map, is pushed between panels 5, 6 into abutment with the hinging edge between strips 9, 10 and when the panel 6 is closed over the panel 5, the map 11 is affixed at two edges, while also the flexible panel 6 is kept tight on the rigid panel 5.
  • Fig. 2 does not show the magnetized strips in the bands 7-10. It is observed that the strips need not necessarily extend at right angles to the hinge. It is necessary though that they extend in mutually parallel relationship per panel or band, and that the strips of coacting panels in closed clamping position lie directly opposite each other and have opposite magnetic polarities.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Sheet Holders (AREA)
EP19850200156 1984-02-10 1985-02-08 Elastische Magnetklemme Expired EP0152147B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8400431A NL187040C (nl) 1984-02-10 1984-02-10 Flexibele magnetische klem en kaarthouder voorzien van een dergelijke klem.
NL8400431 1984-02-10

Publications (3)

Publication Number Publication Date
EP0152147A2 true EP0152147A2 (de) 1985-08-21
EP0152147A3 EP0152147A3 (en) 1985-09-25
EP0152147B1 EP0152147B1 (de) 1991-01-16

Family

ID=19843470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850200156 Expired EP0152147B1 (de) 1984-02-10 1985-02-08 Elastische Magnetklemme

Country Status (3)

Country Link
EP (1) EP0152147B1 (de)
DE (1) DE3581296D1 (de)
NL (1) NL187040C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003138A1 (en) * 1988-09-26 1990-04-05 Frank James Ross Display device
FR2645421A1 (fr) * 1989-04-06 1990-10-12 Giberstein Daniel Dispositif d'encadrement et de fixation a un support metallique de documents, de photographies ou analogues
WO1995033253A1 (en) * 1994-05-30 1995-12-07 Christer Zarelius A picture or text display unit
ES2153316A1 (es) * 1999-02-26 2001-02-16 Jimenez Manuel Sanchez Medios de obscurecimiento de vidrios dobles.
FR2929435A1 (fr) * 2008-03-28 2009-10-02 Hmy Gestion Soc Par Actions Si Dispositif d'affichage flexible

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1590570A (de) * 1968-05-08 1970-04-20
US4023290A (en) * 1974-01-21 1977-05-17 Josephson Joseph P Chart device
BE832377A (fr) * 1975-08-13 1975-12-01 Element pour la suspension de cadres, gravures, peintures ou similaires
US4258493A (en) * 1979-05-04 1981-03-31 Cling Cal Corporation Advertising display means and method
DE8311516U1 (de) * 1982-04-22 1983-09-15 West Country Marketing & Advertising Ltd., Clifton, Bristol Vorrichtung zum aufhaengen blattfoermigen materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990003138A1 (en) * 1988-09-26 1990-04-05 Frank James Ross Display device
FR2645421A1 (fr) * 1989-04-06 1990-10-12 Giberstein Daniel Dispositif d'encadrement et de fixation a un support metallique de documents, de photographies ou analogues
WO1995033253A1 (en) * 1994-05-30 1995-12-07 Christer Zarelius A picture or text display unit
ES2153316A1 (es) * 1999-02-26 2001-02-16 Jimenez Manuel Sanchez Medios de obscurecimiento de vidrios dobles.
FR2929435A1 (fr) * 2008-03-28 2009-10-02 Hmy Gestion Soc Par Actions Si Dispositif d'affichage flexible

Also Published As

Publication number Publication date
DE3581296D1 (de) 1991-02-21
NL8400431A (nl) 1985-09-02
NL187040B (nl) 1990-12-03
NL187040C (nl) 1991-05-01
EP0152147B1 (de) 1991-01-16
EP0152147A3 (en) 1985-09-25

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