Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
  • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
  • E05C19/16—Devices holding the wing by magnetic or electromagnetic attraction
  • E05C19/161—Devices holding the wing by magnetic or electromagnetic attraction magnetic gaskets
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D23/00—General constructional features
  • F25D23/08—Parts formed wholly or mainly of plastics materials
  • F25D23/082—Strips
  • F25D23/087—Sealing strips

Definitions

• the present invention relates to a sealing gasket with magnetic closure.
• the invention further relates to a new method for the realisation of a sealing gasket with magnetic closure.
• the subject gasket is destined to realise magnetic closures in uses such as windows and doors, door wings of refrigerating rooms, wings and/or doors for shower compartments, etc., exerting a tighter or less tight seal according to the uses and operative requirements arising on each occasion.
• sealing gaskets or section bars with magnetic closure are formed by a supporting section bar made of plastic resin which normally comprises an attachment base or portion, for instance presenting a "P"-shaped cross section or with tabs, for engagement to a movable part or to a fixed part of a window, of a door and the like, and a rabbet portion, presenting a striking face set to match against a surface with which the closure is obtained.
• a supporting section bar made of plastic resin which normally comprises an attachment base or portion, for instance presenting a "P"-shaped cross section or with tabs, for engagement to a movable part or to a fixed part of a window, of a door and the like, and a rabbet portion, presenting a striking face set to match against a surface with which the closure is obtained.
• the magnetised strip-shaped element Internally to the rabbet portion of the section bar is associated a magnetised strip-shaped element, for instance made of plasto-ferrite.
• the magnetised strip-shaped element presents on its main face, corresponding to said striking face of the section bar, at least a pair of magnetised longitudinal bands with opposite polarity on each cross section.
• the magnetic element presents for example two adjacent longitudinal bands, one with North polarity and the other one with South polarity.
• both parts set mutually to match in the closed position are provided with their own magnetic section bar, obviously presenting said magnetised longitudinal bands with their polarities suitably positioned to realise the mutual attraction force.
• each band presents the same polarity along its entire longitudinal development and is positioned adjacently to a band of opposite polarity, so that transversely each band is alternated with a band of opposite polarity.
• the known method for the realisation of the sealing gaskets summarily described above generally comprises the continuous unwinding from a coil of a strip- shaped element already longitudinally magnetised as stated; thereafter, the latter is coated preferably by means of extrusion of a section bar made of plastic resin or the strip-shaped magnetised element is inserted into a plastic resin section bar with an appropriate pre-formed seat; subsequently, the product thus obtained is cooled in tanks, and cut transversely into the required lengths.
• the rectilinear gaskets are terminally welded to form ready-made sealing frames (one can think, for instance, of uses for refrigerated rooms, windows and doors, et cetera).
• gaskets have been proposed on the market which are provided with a magnetic element having an odd number of magnetised longitudinal bands.
• gaskets with an odd number of magnetised longitudinal bands, for instance with three poles, i.e. provided with three magnetised longitudinal bands on the striking face, each longitudinally of the same polarity and of opposite polarity with respect to those flanking it, it would nonetheless be necessary, in case of closures with dual gaskets, to have two distinct magnetic section bars available.
• a first section bar presents the two side bands of a given polarity and the central band of opposite polarity whereas, obviously, the second section bar presents the two lateral bands and the central band with polarity opposite to that of the first section bar.
• the technical task at the base of the present invention is to devise a sealing gasket with magnetic closure and a method for its realisation able substantially to overcome the aforementioned drawbacks, l o
• an important aim of the invention is to devise a sealing gasket with magnetic closure force which is of a single type for both parts of a window, door or the like, to be approached in closure irrespective of the cross section shape of the supporting section bar.
• Another important aim of the invention is to devise a sealing gasket with 15 magnetic closure that allows to prevent all errors in its mounting.
• a further aim of the invention is to devise a method for the realisation of a sealing gasket in accordance with the invention which allows to manufacture additional gaskets in the required lengths without any difficulty.
• FIG. 1 shows a generic cross section of a first embodiment of a sealing gasket for frontal closures whereto the invention can be applied;
• FIG. 2 shows a generic cross section of a second embodiment of a gasket for 45 ° closures whereto the invention can be applied;
• FIG. 3 schematically highlights a front view of two strip-shaped elements 5 magnetised with two poles according to the invention and able mutually to couple in any way, characterised by a pair of segments of opposite polarity in each magnetised longitudinal band;
• FIG. 4 shows a schematic front view of a strip-shaped element magnetised with 4 poles and with a pair of segments for each magnetised longitudinal band
• l o - Figure 5 shows a schematic front view of a strip-shaped element magnetised with two poles and with two pairs of segments for each magnetised longitudinal band.
• a supporting section bar 2 made of plastic resin, in turn comprising an attachment base 3 and a rabbet portion 4 presenting a striking face 4a set to come to rest against a surface provided for matching therewith which, in closures with dual gaskets, is constituted by the striking face of another gasket.
• a magnetised strip-shaped element 5 presenting on a main face 5a, corresponding to the striking face 4a, at least a pair of magnetised longitudinal bands 6, 7 of opposite polarity in each cross section.
• the magnetised longitudinal bands involve part, or preferably, all of the longitudinal extension of the element 5.
• areas of the surface 5a without magnetisation may be provided.
• each longitudinal magnetised band 6, 7 is subdivided in at least a pair of segments, respectively 6a, 6b and 7a, 7b, preferably of equal length presenting homogeneous magnetic poles in each segment (longitudinally consecutive) and opposite with respect to those of the other segment of the same longitudinal band.
• each segment 6a, 6b or 7a, 7b of each magnetised longitudinal band 6 or 7 is flanked laterally and is adjacent longitudinally to segments of opposite polarity.
• Figure 3 shows two strip-shaped elements destined to be mutually coupled and presenting each a pair of magnetised longitudinal strips 6,7.
• Figure 4 shows the main face 5 of a strip-shaped element with two polar pairs, i.e. with four magnetised longitudinal strips 8, 9, 10, 11 , each of which is subdivided into a pair of (longitudinally consecutive) segments, preferably of equal length, i.e. 8a and 8b, 9a and 9b, 10a and 10b, 1 la and 1 lb.
• each segment for instance with North polarity, is laterally flanked by one or more segments with South polarity and is longitudinally adjacent to a segment, also with South polarity.
• Figure 5 shows the main face of a strip-shaped element with one polar pair, i.e. with two longitudinal strips 6, 7, each of which is subdivided into two pairs of segments of equal length respectively indicated as 6a, 6b, 6c, 6d and 7a, 7b, 7c, 7d.
• Each segment of each strip complies with the alternation in polarity with the segment flanking it and with the longitudinal adjacent segment or segments.
• each magnetised longitudinal strip into a greater number of pairs of segments of the same length, according to a checkerboard distribution of the alternating polarity.
• strip-shaped elements longitudinally magnetised with the criteria described above can be advantageously coupled to any shape of the supporting section bar.
• the rabbet portion 4 of the supporting section bar presents a substantially rectangular cross section shape so as to position the striking face 4a parallel with respect to the attachment base 4 to realise frontal closures.
• this supporting section bar is a single one for both gaskets of a dual gasket closure, but, advantageously, cannot give rise to mounting errors because, as can be noted observing any one of the Figures 3, 4, 5, the reversal or mutual interchange of the extremities of a gasket does not change the disposition of the magnetic poles.
• the rabbet portion 4 has a substantially right triangle cross section profile, thereby positioning the striking face 4a inclined to about 45 ° with respect to the attachment base 3 to enable forming closures between opposite gaskets along matching surfaces oriented to 45 ° .
• the employment of the magnetised strip-shaped element in the manners described above is particularly advantageous as it is possible to produce a single type of symmetric gasket and then reverse, upon mounting, one of the two gaskets to be coupled in order to realise the right gasket and the left gasket with a simple reversal of position, naturally keeping unchanged the position of the magnetic charges. Hence, the manufacture and storage of two distinct gaskets are avoided with obvious benefits in terms of costs.
• the invention realises a new method which also constitutes an integral part of the present patent.
• the method provides for continuously unwinding from a coil a strip-shaped element made of material that is capable of being magnetised, but is not yet magnetised (or is only partially magnetised), for instance plasto-ferrite, and for inserting said strip-shaped element in a supporting section bar made of plastic resin, for instance directly during the extrusion of the section bar itself.
• the method further provides for identifying each portion of the supporting section bar, fitted internally with the strip-shaped element able to be magnetised, destined to form a gasket, i.e. having the required longitudinal development, and for subdividing said portion into at least a pair of areas of equal length (or similar length).
• the areas thus identified are subjected to magnetisation on a main face corresponding to the striking face of the supporting section bar along at least a pair of longitudinal faces, each subdivided into segments corresponding to the same areas of equal length (or similar length).
• each segment 6a, 6b, 7a, 7b, etc. presents its own homogeneous polarity, opposite to that of the segment laterally flanking it and of the longitudinally adjacent segment.
• the invention presents important advantages.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Electromagnetism (AREA)
• General Engineering & Computer Science (AREA)
• Refrigerator Housings (AREA)
• Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
• Gasket Seals (AREA)
• Burglar Alarm Systems (AREA)
• Dry Development In Electrophotography (AREA)
• Seal Device For Vehicle (AREA)

Priority Applications (8)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (8)

Families Citing this family (2)

Citations (10)

• 1999
  • 1999-09-23 AT AT99947842T patent/ATE262149T1/de not_active IP Right Cessation
  • 1999-09-23 DE DE69915709T patent/DE69915709T2/de not_active Expired - Lifetime
  • 1999-09-23 ES ES99947842T patent/ES2216568T3/es not_active Expired - Lifetime
  • 1999-09-23 DK DK99947842T patent/DK1214554T3/da active
  • 1999-09-23 BR BR9917497-9A patent/BR9917497A/pt not_active IP Right Cessation
  • 1999-09-23 AU AU61202/99A patent/AU6120299A/en not_active Abandoned
  • 1999-09-23 WO PCT/IT1999/000300 patent/WO2001022015A1/en active IP Right Grant
  • 1999-09-23 EP EP99947842A patent/EP1214554B1/en not_active Expired - Lifetime

Patent Citations (10)

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