US3324930A - Folding sliding doors - Google Patents

Folding sliding doors Download PDF

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Publication number
US3324930A
US3324930A US47490565A US3324930A US 3324930 A US3324930 A US 3324930A US 47490565 A US47490565 A US 47490565A US 3324930 A US3324930 A US 3324930A
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US
United States
Prior art keywords
mortise
strip
web
bead
door
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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.)
Expired - Lifetime
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Inventor
Colombo Roberto
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LAVORAZIONE MAT PLAST
Lavorazione Materie Plastiche (lmp) SpA
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LAVORAZIONE MAT PLAST
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Priority to IT456664 priority Critical
Application filed by LAVORAZIONE MAT PLAST filed Critical LAVORAZIONE MAT PLAST
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Publication of US3324930A publication Critical patent/US3324930A/en
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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D3/00Hinges with pins
    • E05D3/06Hinges with pins with two or more pins
    • E05D3/12Hinges with pins with two or more pins with two parallel pins and one arm
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00Suspension arrangements for wings
    • E05D15/26Suspension arrangements for wings for folding wings
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/48Wings connected at their edges, e.g. foldable wings
    • E06B3/481Wings foldable in a zig-zag manner or bi-fold wings
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/10Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13Application of doors, windows, wings or fittings thereof for buildings or parts thereof characterised by the type of wing
    • E05Y2900/132Doors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T16/00Miscellaneous hardware [e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.]
    • Y10T16/52Hinge
    • Y10T16/524Ball and socket

Description

June i 3, 19%? R. commrao 3,324,%U

FOLDING SLIDING DOORS Filed July 26, 1965 2 SheetsSheet 1 June 33, 19657 R. COLOMBO FOLDING SLIDING DOORS 2 Sheets-Sheet 2 Filed July 26, 1965 United States Patent 3,324,930 FOLDING SLIDING DOORS Roberto Colombo, Turin, Italy, assignor to Lavorazione Materie Plastiche (L.M.P.) S.p.A., Turin, Italy Filed July 26, 1965. Ser. No. 474,905

Claims priority, application Italy, Aug. 3, 1964,

4,566/ 64 2 Claims. (Cl. 160231) This invention relates to folding sliding doors of the character wherein the adjoining vertical edges of the slats are hinged to each other by means of a vertically extending flexible strip of plastics comprising a bead on each of its longitudinal edges inserted into a mortise in the corresponding slat.

Folding sliding doors of the above-defined character are disclosed by British patent specification 927,590, for example, and it will be evident to experts that the expedient of using hinges made of flexible strips of extruded plastics strongly contributes to both the secondary of manufacture and competivity of the door, also because of their noiseless operation.

However, doors of the character defined above suffer from a drawback residing in that the adjoining strips crack relatively easily and tear within a relatively short period of use, even when molecularly orientated polypropylene is used as material for the strips. Strips comprising a relatively thin web section between the beads flex better than thick-webbed ones; however, thin-webbed strips do not satisfactorily withstand the tensile and compressive forces which they are called upon to transmit from a slat to another on unfolding and folding-up the door, particularly in the case of a careless use of the latter (as frequently occurs in practice). Relatively thick-webbed, almost rigid strips flex hardly at all; thus, they crack very easily particularly because the dihedral angle formed by a pair of adjacent slats in a folding sliding door is variable within very wide limits (0 in folded-up condition and 170-180 in the unfolded condition of the door).

The general object of this invention is to improve folding sliding doors of the character defined hereinbefore thereby to avoid the drawbacks just pointed out above.

Thus, the invention provides a folding sliding door of the character wherein the adjoining vertical edges of the slats are hinged to each other by means of a vertically extending flexible strip of plastics comprising a bead on each of its longitudinal edges inserted into a mortise in the corresponding slat, characterized in that: (a) both the bead and mortise are of circular cross-sectional profile; (b) the bead is lose in the mortise; (c) the mortise opens on the edge of its slat through a slit larger than the web of the strip interconnecting the beads but smaller than the diameter of the latter, whereby each of the heads is rotatable in its associated mortise through a limited angle; (d) a vertically effective abutment is provided on the slot in the region of the lower end of the mortise preventing the strip from slipping-out downwardly from the slat.

Further features and advantages of the invention will become evident to experts from the following description, wherein reference is made to the accompanying drawings in which:

FIGURE 1 is a fragmentary plan-view of an embodiment of the invention;

FIGURE 2 is an enlarged cross-sectional view of one of the corners formed by the slats in FIG. 1;

FIGURE 3 shows the corner of FIG. 2 in folded-up condition of the door;

FIGURE 4 is a vertical cross-sectional view on line IV-IV of FIG. 2.

The door shown comprises a horizontal overhead track 10, consisting of a rigid channel member including a pair of in-turned opposed flanges 10A, 10B leaving free therebetween a slot 11 (FIG. 1). Each of the slats 12, 14, 16 shown is suspended from the track by means of a runner R, fitted to the upper end of the slat in alignment with the vertical central axis of the latter, according to the conventional practice, in an arrangement wherein the runner is slidably or rollably supported by the flanges 10A, 108 while permitting its associated slat to angularly swing about said axis (see arrows F) as the door is being folded-up or unfolded. The exact structure of the runners is not part of this invention; in the embodiment shown, the runners R essentially comprise a hemispherical head which is slidably and rotatably supported by the flanges 10A, 10B and is rigidly connected to its associated slat by means of a cylindrical neck passing through the slot 11.

FIGS. 1 and 2 show the door in a substantially halfopen condition, as will be readily recognized from the dihedral angle formed by the slats. The adjoining vertical edges of each pair 1244, 14-16 of consecutive slats are hinged to each other by means of a length of an extruded strip '18 of flexible plastics, advantageously polypropylene, extending vertically. The strip comprises a flat flexible web section 19 interconnecting a pair of beads 20', 21 of circular cross-sectional shape, the polypropylene material in said web section 19 being advantageously cold-drawn in the plane of the section perpendicularly to the beads thereby to molecularly orientate the material in the latter direction with the view to increase its hinge-forming properties, according to concepts known per se: The original shape of the strip is that shown in FIG. 2, in which the web section 19 is planar, i.e. extending directly from a head to the other.

Each of the slats consists of a length of a flat tubular profile of extruded rigid plastics, such as rigid PVC, for example. The adjoining edges of the slats are each extrusion-formed with a mortise 22, 23, respectively, of a circular cross-sectional shape, opening on its respective edge through a likewise extrusion-formed slit 24, 25, respectively. The beads 20, 21 are longitudinally slipped into their associated mortises 22, 23, respectively, the diameter of the beads being somewhat smaller than the diameter of the mortises so that the former are smoothly loose in the latter (as has been exaggeratedly shown in FIGS. 2, 3 and 4). Moreover, the width of the slits 24, 25 is greater than the thickness of the web section 19 of the strip 18, but is smaller than the diameter of the beads. In this manner, each of the beads is smoothly rotatable in its associated mortise through a limited angle as the door is being folded-up or unfolded.

It will be also seen in FIG. 2 that, in the condition shown, the slits 24, 25 are directly opposed to each other and, at the same time, the Web section 19 of the strip 18 is in its original planar configuration, so that no internal stress is present in the strip. Now, as the door is being displaced to its fully open condition (in which the dihedral angle is zero; FIG. 3), there is a moment in which the inner edge of each of the slits 24, 25, such as the edge denoted by 22A in FIG. 2, abuts the web section 19 of the strip and flexes said section to the outside by being co-adjuvated by the compressive forces acting transversely between the beads 20, 21 as the door is being folded-up. Thus, as opposed to prior art structures, the passage from the condition of FIG. 2 to the condition of FIG. 3 of the door is accompanied at first by a limited rotation of each of the beads in its mortise, without the web of the strip being flexed, and subsequently only by flexure of the said web through a limited angle substantially smaller than the dihedral angle a corresponding to the half-open condition of the door. A similar operation, but in inverse direction, takes place as the door passes from the condition of FIG. 2 to its fully unfolded (closed) condition.

The angle a in the half-open condition of the door usually amounts to about 80, as is known to experts. Consequently, in order to insure the above-described operation, the width of the slits 24, 25, as compared with the thickness of the web 19 of the strip, shall be such as to give rise to an angular play (or rotational freedom) of the strip in each of the slats through an angle substantially less than 80, preferably amounting to 40-50 (i.e. about half only, of the said angle a).

It will be readily appreciated from the above description that, owing to a limited extent of flexure of the web of the strip in the two limit-conditions of the door, the thickness of said web can be made substantially greater than in the prior structures without risk of cracking, with an additional advantage of the said strip to withstand powerful and/ or sharp pulls applied to the door in use.

In order to prevent the strip from slipping out (principally downwardly) from the slats connected therethrough, a vertically effective abutment is provided in the lower end region of one at least of the slats. In the embodiment shown in FIG. 4, cylindrical plugs P are forcibly inserted into the lower ends of the mortises 22, 23; similar plugs P can be moreover provided in the upper ends of the mortises, if desired.

Although polypropylene is an excellent material for the strip 18, other suitable flexible plastics (such as nylon, for example) can be employed, if desired.

What I claim is:

1. A folding sliding door of the type including a plurality of slats with adjacent vertical edges of the slats hinged to each other by means of a vertically extending flexible strip of plastic formed as a web having a bead on each of its longitudinal edges, each head being inserted into a mortise in the corresponding adjacent slat, the bead and mortise being of circular shape and cross sectional profile, with the improvements comprising: the beads being of lesser diameter than the mortises so that the head is freely rotatable in the mortise, a slit opening from the mortise to the edge of the slat the mortise is in, the slit being of greater dimension than the thickness of the web of the strip interconnecting the beads, but the web being of lesser dimension than the diameter of the beads, each head being freely rotatable in its associated mortise through a limited angle less than the angle of rotation necessary to allow full opening 'or closing of the door without flexing of the strip, so that a now-flexing hinge is provided between each slat, the edge of the mortises abutting the web of the interconnecting strip and flexing said strip to provide a flexing hinge between the panels in the fully opened or closed positions of the door, and an effective vertical abutment carried by the slats at the lower end of the mortise preventing the strip from slipping downwardly from the mortise.

2. A door as in claim 1 when the strip consists oi polypropylene resin having in the web section of the strip a molecular orientation substantially perpendicular to the beads in the plane of the web.

References Cited FOREIGN PATENTS 5/1961 Canada. 12/1964 Canada.

Claims (1)

1. A FOLDING SLIDING DOOR OF THE TYPE INCLUDING A PLURALITY OF SLATS WITH ADJACENT VERTICAL EDGES OF THE SLATS HINGED TO EACH OTHER BY MEANS OF A VERTICALLY EXTENDING FLEXIBLE STRIP OF PLASTIC FORMED AS A WEB HAVING A BEAD ON EACH OF ITS LONGITUDINAL EDGES, EACH BEAD BEING INSERTED INTO A MORTISE IN THE CORRESPONDING ADJACENT SLAT, THE BEAD AND MORTISE BEING OF CIRCULAR SHAPE AND CROSS SECTIONAL PROFILE, WITH THE IMPROVEMENTS COM PRISING: THE BEADS BEING OF LESSER DIAMETER THAN THE MORTISES SO THAT THE BEAD IS FREELY ROTATABLE IN THE MORTISE, A SLIT OPENING FROM THE MORTISE TO THE EDGE OF THE SLAT THE MORTISE IS IN, THE SLIT BEING OF GREATER DIMENSION THAN THE THICKNESS OF THE WEB OF THE STRIP INTERCONNECTING THE BEADS, BUT THE WEB BEING OF LESSER DIMENSION THAN THE DIAMETER OF THE BEADS, EACH BEAD BEING FREELY ROTATABLE IN ITS ASSOCIATED MORTISE THROUGH A LIMITED ANGLE LESS THAN THE ANGLE OR ROTATION NECESSARY TO ALLOW FULL OPENING OR CLOSING OF THE DOOR WITHOUT FLEXING OF THE STRIP, SO THAT A NOW-FLEXING HINGE IS PROVIDED BETWEEN EACH SLAT, THE EDGE OF THE MORTISE ABUTTING THE WEB OF THE INTERCONNECTING STRIP AND FLEXING SAID STRIP TO PROVIDE A FLEXING HINGE BETWEEN THE PANELS IN THE FULLY OPENED OR CLOSED POSITIONS OF THE DOOR, AND AN EFFECTIVE VERTICAL ABUTMENT CARRIED BY THE SLATS AT THE LOWER END OF THE MORTISE PREVENTING THE STRIP FROM SLIPPING DOWNWARDLY FROM THE MORTISE.
US47490565 1964-08-03 1965-07-26 Folding sliding doors Expired - Lifetime US3324930A (en)

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US47486165 Expired - Lifetime US3331427A (en) 1964-08-03 1965-07-26 Folding sliding doors

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419064A (en) * 1966-12-12 1968-12-31 Oddicini Renzo Articulated structure particularly for partitions
US3441975A (en) * 1967-07-25 1969-05-06 Charles E Shepherd Continuous hinge
US3490805A (en) * 1968-01-15 1970-01-20 Standard Oil Co Plastic clasp
US3516114A (en) * 1968-10-14 1970-06-23 Edward F Joyce Hinge
US3685637A (en) * 1970-07-17 1972-08-22 Seatech Engineering Pallet
US3894571A (en) * 1973-05-18 1975-07-15 Merritt Equipment Co Roll-up door assembly for vehicles
US4226040A (en) * 1979-06-29 1980-10-07 R & J Sign Company, Inc. Folding scaffold sign
US4232724A (en) * 1978-10-23 1980-11-11 Nightingale Industries Limited Modular partition
US4344475A (en) * 1976-04-05 1982-08-17 Frey Fred J Office partition interconnector assembly
US4438605A (en) * 1981-10-19 1984-03-27 Delucia Paul V Continuous, moveable thermal barrier system
US4878329A (en) * 1988-07-15 1989-11-07 Cbi Research Corporation Structural panels for walls, floors and roofs having exterior metal layers and an insulating concrete core
US20030159378A1 (en) * 2002-02-22 2003-08-28 Johnston Robert M. Method and apparatus for providing a modular storage system
US20070245845A1 (en) * 2006-04-20 2007-10-25 Ridgway Jason R Steering column assembly for a vehicle
US20110012373A1 (en) * 2007-10-17 2011-01-20 Dieter Ramsauer Bolt having a lever-shaped bolt drive
US20130286553A1 (en) * 2012-04-27 2013-10-31 Nokia Corporation Limiting movement
US20160202736A1 (en) * 2015-01-08 2016-07-14 Acer Inc. Hinge Device and Hinge Main Body
US9632575B2 (en) 2010-05-21 2017-04-25 Nokia Technologies Oy Method, an apparatus and a computer program for controlling an output from a display of an apparatus
US9823707B2 (en) 2012-01-25 2017-11-21 Nokia Technologies Oy Contortion of an electronic apparatus

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419063A (en) * 1967-01-16 1968-12-31 Anjac Plastics Top carrier system for drapery panels
US3516473A (en) * 1968-10-17 1970-06-23 Louverdrape Inc Interlocking cap for foldable door
US3799237A (en) * 1971-02-27 1974-03-26 I Proserpi Folding door construction
US3819226A (en) * 1972-10-10 1974-06-25 Coleman Co Attachment assembly for snowmobile windshield
US3862523A (en) * 1973-07-02 1975-01-28 Robert F Eaton Panel construction for displays
DE2856171A1 (en) * 1978-12-27 1980-07-10 Hueppe Justin Fa Foldable door or wall
GB2133457A (en) * 1983-01-12 1984-07-25 Michael Beringer Hinge connections
GB2211796B (en) * 1987-10-30 1991-10-09 York Trailer Co Ltd Improvements in trailers and semi-trailers
DE4137040C2 (en) * 1991-11-11 1994-07-07 Erich Doering Door blade of a ceiling or Seitensektionaltors or Rundlauftors, especially for garages or warehouses
GB2277550A (en) * 1993-05-01 1994-11-02 Alumplast Ltd Folding doors
US5992496A (en) * 1999-02-02 1999-11-30 Lee; Chen Hsiang Resilient suspension device for foldable doors
US6209171B1 (en) 1999-10-01 2001-04-03 The Stanley Works Movable door mounting assembly
US6220332B1 (en) * 1999-12-06 2001-04-24 Sheng-Yang Lai Door assembly for spanning an entrance of a shower room
US10119324B2 (en) * 2015-08-17 2018-11-06 Ltl Wholesale, Inc. Folding doors with receiving channel and locking clip

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA619269A (en) * 1961-05-02 L. Hicks Harold Multiple panel type folding doors
CA699309A (en) * 1964-12-08 L. Hicks Harold Multiple panel type folding doors

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713899A (en) * 1953-03-16 1955-07-26 Hough Shade Corp Flexible doors
US2860697A (en) * 1954-12-02 1958-11-18 Hough Shade Corp Accordion type folding door
US2863164A (en) * 1955-12-12 1958-12-09 Curtition Corp Curtain clip
US2994371A (en) * 1957-12-23 1961-08-01 Wood Specialty Products Inc Accordion-folded door assembly
US2952312A (en) * 1958-01-31 1960-09-13 Venetian Folding Door Corp Folding door
US2959220A (en) * 1958-06-10 1960-11-08 Allen E Latham Shutters
US3073382A (en) * 1960-02-15 1963-01-15 New Castle Products Inc Folding door structure
US3167111A (en) * 1962-12-11 1965-01-26 New Castle Products Inc Folding door

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA619269A (en) * 1961-05-02 L. Hicks Harold Multiple panel type folding doors
CA699309A (en) * 1964-12-08 L. Hicks Harold Multiple panel type folding doors

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419064A (en) * 1966-12-12 1968-12-31 Oddicini Renzo Articulated structure particularly for partitions
US3441975A (en) * 1967-07-25 1969-05-06 Charles E Shepherd Continuous hinge
US3490805A (en) * 1968-01-15 1970-01-20 Standard Oil Co Plastic clasp
US3516114A (en) * 1968-10-14 1970-06-23 Edward F Joyce Hinge
US3685637A (en) * 1970-07-17 1972-08-22 Seatech Engineering Pallet
US3894571A (en) * 1973-05-18 1975-07-15 Merritt Equipment Co Roll-up door assembly for vehicles
US4344475A (en) * 1976-04-05 1982-08-17 Frey Fred J Office partition interconnector assembly
US4232724A (en) * 1978-10-23 1980-11-11 Nightingale Industries Limited Modular partition
US4226040A (en) * 1979-06-29 1980-10-07 R & J Sign Company, Inc. Folding scaffold sign
US4438605A (en) * 1981-10-19 1984-03-27 Delucia Paul V Continuous, moveable thermal barrier system
US4878329A (en) * 1988-07-15 1989-11-07 Cbi Research Corporation Structural panels for walls, floors and roofs having exterior metal layers and an insulating concrete core
US20030159378A1 (en) * 2002-02-22 2003-08-28 Johnston Robert M. Method and apparatus for providing a modular storage system
US6880297B2 (en) * 2002-02-22 2005-04-19 Robert M. Johnston Method and apparatus for providing a modular storage system
US20070245845A1 (en) * 2006-04-20 2007-10-25 Ridgway Jason R Steering column assembly for a vehicle
US20110012373A1 (en) * 2007-10-17 2011-01-20 Dieter Ramsauer Bolt having a lever-shaped bolt drive
US9632575B2 (en) 2010-05-21 2017-04-25 Nokia Technologies Oy Method, an apparatus and a computer program for controlling an output from a display of an apparatus
US9983729B2 (en) 2010-05-21 2018-05-29 Nokia Technologies Oy Method, an apparatus and a computer program for controlling an output from a display of an apparatus
US9823707B2 (en) 2012-01-25 2017-11-21 Nokia Technologies Oy Contortion of an electronic apparatus
US20130286553A1 (en) * 2012-04-27 2013-10-31 Nokia Corporation Limiting movement
US9823696B2 (en) * 2012-04-27 2017-11-21 Nokia Technologies Oy Limiting movement
US20160202736A1 (en) * 2015-01-08 2016-07-14 Acer Inc. Hinge Device and Hinge Main Body

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Publication number Publication date
US3331427A (en) 1967-07-18
GB1069967A (en) 1967-05-24
GB1069966A (en) 1967-05-24
CH418594A (en) 1966-08-15

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