EP0426261A1 - Foam body with internal springing and method for manufacturing same - Google Patents

Foam body with internal springing and method for manufacturing same Download PDF

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Publication number
EP0426261A1
EP0426261A1 EP90202892A EP90202892A EP0426261A1 EP 0426261 A1 EP0426261 A1 EP 0426261A1 EP 90202892 A EP90202892 A EP 90202892A EP 90202892 A EP90202892 A EP 90202892A EP 0426261 A1 EP0426261 A1 EP 0426261A1
Authority
EP
European Patent Office
Prior art keywords
springs
spring
pressure distributing
channel
plates
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.)
Withdrawn
Application number
EP90202892A
Other languages
German (de)
French (fr)
Inventor
Johannes De Rooy
Wilhelmus Leonardus Andreas Van Den Akker
Gerrit Van Der Wardt
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.)
Veenendaal & Co Bv
Original Assignee
Veenendaal & Co Bv
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 Veenendaal & Co Bv filed Critical Veenendaal & Co Bv
Publication of EP0426261A1 publication Critical patent/EP0426261A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/04—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using springs in compression, e.g. coiled
    • A47C23/043—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using springs in compression, e.g. coiled using wound springs
    • A47C23/0431—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using springs in compression, e.g. coiled using wound springs supporting a flat board or strip
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/20—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with springs moulded in, or situated in cavities or openings in foamed material

Definitions

  • the invention relates to an elongate body of plastic foam having a covering layer on at least the flat sides, for example a mattress or a seat cushion for an article of seating furniture, wherein compression springs are arranged in the body oriented to the flat sides and pressure distri­buting means for distributing the forces exerted by the compression springs.
  • a foam body is known from the German utility model 89.03.761.
  • the foam body known from this utility model is provided with compression springs arranged in recesses in the body and pressure distributing means placed on either side there­of.
  • These pressure distributing means take the form of quite stiff plates, the dimensions of which in peripheral directi­on correspond approximately with those of the foam body, and which distribute over the whole surface of the body the pressure forces exerted by the springs during use of the body.
  • the pressure distributing plates are provi­ded on their sides remote from the springs with a layer manufactured from a plastic foam or other soft material.
  • a drawback to the foam body constructed in this manner is that, because of the stiffness of the pressure distributing plate, the form of the body does not adapt optimally to the form of the user sitting or lying on the body.
  • the present invention therefore has for it object to pro­vide a body of plastic foam as described in the preamble of claim 1 wherein this drawback is obviated.
  • the pressure distributing means consist of separate plates placed on at least one of the end portions of at least one of the springs, the dimen­sions of each of which plates are greater transversely of the spring direction than those of the end portion of the associated spring.
  • the springs are coil springs and each plate has a protruding, cylindrical portion enclosed by the spring.
  • the coil springs are preferably of conical form.
  • the invention further relates to a method for arranging springs and pressure distributing plates in a foam body whe­rewith a resilient foam body according to the invention can be manufactured in simple and economic manner.
  • Each channel is preferably open at one end.
  • each channel can also be open at two ends and, after arranging the channels and placing the springs with the plates, these ends can be closed off by a layer of plastic foam.
  • An elongate body 1 manufactured from plastic foam, profi­led on one side and forming a seat cushion for an item of seating furniture 2 (fig. 1) is provided with channels 3 ar­ranged from the flat side at regular mutual intervals where­in compression springs 4 are placed which exert pressure forces when the body 1 is loaded.
  • pressure distributing means are fitted on either side of springs 4.
  • These pressure distributing means comprise at the bottom 6 a classical pressure distri­buting plate 7 made in one piece and at the top 5 separate pressure distributing dishes 8 placed on each spring 4, the dimensions of which are greater transversely of the spring direction than those of the top 5 of the associated spring 4.
  • the pressure distributing dishes 8 comprise a flat por­tion 9 and a protruding, cylindrical portion 10 (fig. 2), which latter portion is close-fittingly enclosed by spring 4.
  • the spring 4 can be provided with a pressure distributing dish 8 on one or both ends. (In the latter case the pressure distributing plate 7 shown in fig. 1 is of course dispensed with).
  • the spring 4 with pressure distributing dishes 8 can likewise be applied in a combination body 11 assembled from two flat foam bodies 1, 1 (fig. 3). Both the bodies 1, 1 provided with channels 3 arranged in one flat side are in that case placed onto one another such that the channels 3, 3 lie mutually connecting.
  • the channel 3 connects both flat sides of foam body 1 and the dishes 8, 8 distribu­te the force exerted by springs 4 into the resilient layers 12, 12 manufactured from a plastic foam or other soft mate­ rial and arranged on either side of body 1.
  • the form of the pressure distributing means according to the invention makes it possible to produce the foam body in simpler manner than has been possible up to the present. Be­cause two pressure distributing plates and soft layers cove­ring the pressure distributing plates do not have to be ar­ranged on either side of the compression springs and extend­ing over the entire periphery of the foam body it is possi­ble in the production of a foam body according to the inven­tion to manufacture the foam body from one piece, to then provide it on one side with channels wherein springs with pressure distributing dishes are placed and to finally close off the channels.

Abstract

The invention relates to a plastic foam body (1) having a covering layer on the flat sides (5,6), like a mattress or a seat cushion. Compression springs (4) are arranged in the body (1) oriented to the flat sides (5,6), and pressure distributing means (7,8) for distributing the forces exerted by the compression springs (4). The pressure distributing means (7,8) comprise separate pressure distri­buting dishes (8) placed on each spring (4). The dimensions of each dish (8) are greater transversely of the spring direction than those of the end portion of its associated spring (4). The invention further relates to a method for arranging springs (4) and pressure distributing dishes (8) in a foam body (1) by providing in the body (1) channels (3), arranging a spring (4) with a dish (8) in each channel (3), and closing of the channel (3).

Description

  • The invention relates to an elongate body of plastic foam having a covering layer on at least the flat sides, for example a mattress or a seat cushion for an article of seating furniture, wherein compression springs are arranged in the body oriented to the flat sides and pressure distri­buting means for distributing the forces exerted by the compression springs. Such a foam body is known from the German utility model 89.03.761.
  • The foam body known from this utility model is provided with compression springs arranged in recesses in the body and pressure distributing means placed on either side there­of. These pressure distributing means take the form of quite stiff plates, the dimensions of which in peripheral directi­on correspond approximately with those of the foam body, and which distribute over the whole surface of the body the pressure forces exerted by the springs during use of the body. In order to increase the seating or reclining comfort of the foam body the pressure distributing plates are provi­ded on their sides remote from the springs with a layer manufactured from a plastic foam or other soft material.
  • A drawback to the foam body constructed in this manner is that, because of the stiffness of the pressure distributing plate, the form of the body does not adapt optimally to the form of the user sitting or lying on the body.
  • The present invention therefore has for it object to pro­vide a body of plastic foam as described in the preamble of claim 1 wherein this drawback is obviated. This is achieved according to the invention in that the pressure distributing means consist of separate plates placed on at least one of the end portions of at least one of the springs, the dimen­sions of each of which plates are greater transversely of the spring direction than those of the end portion of the associated spring. Thus obtained is a foam body with inter­nal springing that can adapt simply to the body shape of the user.
  • While it is true that from the American patent specifica­tion 3.623.171 a foam body is known with compression springs which are provided with separate retainers on their end por­tions, the dimensions of these retainers transversely of the spring direction are practically equal to those of the asso­ciated springs, so that the retainers do not distribute the forces exerted by the springs.
  • In a preferably applied embodiment of the body according to the invention the springs are coil springs and each plate has a protruding, cylindrical portion enclosed by the spring. The coil springs are preferably of conical form.
  • The invention further relates to a method for arranging springs and pressure distributing plates in a foam body whe­rewith a resilient foam body according to the invention can be manufactured in simple and economic manner. This is achieved by the invention in that channels are arranged in the foam body, a spring with a pressure distributing plate is subsequently arranged in each channel and the channel is finally closed off. Each channel is preferably open at one end. During application of the method according to the invention each channel can also be open at two ends and, after arranging the channels and placing the springs with the plates, these ends can be closed off by a layer of plastic foam.
  • Mentioned and other features of the invention are eluci­dated in the light of several embodiments, wherein reference is made to the annexed drawing, wherein corresponding refe­rence numerals designate corresponding components and:
    • fig. 1 shows a cut away view of a body according to the invention used in a piece of seating furniture;
    • fig. 2 is a section of a spring with pressure distribut­ing means according to the invention;
    • fig. 3 shows a partly sectional view of a possible appli­ cation of the spring and the pressure distributing means of fig. 2; and
    • fig. 4 is a partly sectional view of an alternative possible application of this spring and pressure distribu­ting means.
  • An elongate body 1 manufactured from plastic foam, profi­led on one side and forming a seat cushion for an item of seating furniture 2 (fig. 1) is provided with channels 3 ar­ranged from the flat side at regular mutual intervals where­in compression springs 4 are placed which exert pressure forces when the body 1 is loaded. In order to distribute these pressure forces uniformly over the upper and lower part 5, 6 of body 1, pressure distributing means are fitted on either side of springs 4. These pressure distributing means comprise at the bottom 6 a classical pressure distri­buting plate 7 made in one piece and at the top 5 separate pressure distributing dishes 8 placed on each spring 4, the dimensions of which are greater transversely of the spring direction than those of the top 5 of the associated spring 4.
  • The pressure distributing dishes 8 comprise a flat por­tion 9 and a protruding, cylindrical portion 10 (fig. 2), which latter portion is close-fittingly enclosed by spring 4. The spring 4 can be provided with a pressure distributing dish 8 on one or both ends. (In the latter case the pressure distributing plate 7 shown in fig. 1 is of course dispensed with).
  • The spring 4 with pressure distributing dishes 8 can likewise be applied in a combination body 11 assembled from two flat foam bodies 1, 1 (fig. 3). Both the bodies 1, 1 provided with channels 3 arranged in one flat side are in that case placed onto one another such that the channels 3, 3 lie mutually connecting.
  • In the embodiment shown in fig. 4 the channel 3 connects both flat sides of foam body 1 and the dishes 8, 8 distribu­te the force exerted by springs 4 into the resilient layers 12, 12 manufactured from a plastic foam or other soft mate­ rial and arranged on either side of body 1.
  • The form of the pressure distributing means according to the invention makes it possible to produce the foam body in simpler manner than has been possible up to the present. Be­cause two pressure distributing plates and soft layers cove­ring the pressure distributing plates do not have to be ar­ranged on either side of the compression springs and extend­ing over the entire periphery of the foam body it is possi­ble in the production of a foam body according to the inven­tion to manufacture the foam body from one piece, to then provide it on one side with channels wherein springs with pressure distributing dishes are placed and to finally close off the channels. This manner of production offers great advantages compared to known production methods, particular­ly in the manufacture of seat cushions for seating furniture that are profiled on one side, wherein the necessity can be dispensed with of making separate profiled cushion portions which have to be fixed onto the pressure distributing plate arranged on the flat foam body.

Claims (6)

1. Elongate body of plastic foam having a covering layer on at least the flat sides, for example a mattress or a seat cushion for an article of seating furniture, wherein com­pression springs are arranged in the body oriented to the flat sides and pressure distributing means for distributing the forces exerted by the compression springs, characterized in that the pressure distributing means consist of separate plates (8) placed on at least one of the end portions of at least one of the springs (4), the dimensions of each of which plates are greater transversely of the spring directi­on than those of the end portion of the associated spring (4).
2. Body as claimed in claim 1, characterized in that the springs (4) are coil springs and each plate (8) has a prot­ruding, cylindrical portion (10) enclosed by the spring (4).
3. Body as claimed in claim 2, characterized in that the coil springs (4) are of conical form.
4. Method for arranging springs and pressure distributing plates in a body as claimed in any of the claims 1-3, cha­racterized in that channels (3) are arranged in the foam body (1), a spring (4) with a pressure distributing plate (8) is subsequently arranged in each channel (3) and the channel (3) is finally closed off.
5. Method as claimed in claim 4, characterized in that each channel (3) is open at one end.
6. Method as claimed in claim 4, characterized in that each channel (3) is open at two ends and, after arranging the channels (3) and placing the springs (4) with the plates (8), these ends are closed off by a layer (12) of plastic foam.
EP90202892A 1989-11-01 1990-11-01 Foam body with internal springing and method for manufacturing same Withdrawn EP0426261A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902704A NL8902704A (en) 1989-11-01 1989-11-01 FOAM BODY WITH INTERNAL SUSPENSION, AND METHOD OF MANUFACTURING THE SAME
NL8902704 1989-11-01

Publications (1)

Publication Number Publication Date
EP0426261A1 true EP0426261A1 (en) 1991-05-08

Family

ID=19855552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202892A Withdrawn EP0426261A1 (en) 1989-11-01 1990-11-01 Foam body with internal springing and method for manufacturing same

Country Status (2)

Country Link
EP (1) EP0426261A1 (en)
NL (1) NL8902704A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027848A1 (en) * 1996-12-23 1998-07-02 Sleepyhead Manufacturing Company Limited Inner sprung articles and methods of formation
NL1017038C2 (en) * 2001-01-05 2002-07-15 Beter Bed Holding N V Mattress with spring elements, such as coil springs.
GB2434092A (en) * 2005-12-29 2007-07-18 Harrison A Mattresses

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE79656C (en) *
FR1110462A (en) * 1954-09-03 1956-02-13 Advanced mattress or cushion
US3623171A (en) * 1969-11-17 1971-11-30 Sanford L Arkin Mattress construction
DE8903761U1 (en) * 1989-03-25 1989-05-24 Pongs Schaumstoffe Gmbh, 5100 Aachen, De

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE79656C (en) *
FR1110462A (en) * 1954-09-03 1956-02-13 Advanced mattress or cushion
US3623171A (en) * 1969-11-17 1971-11-30 Sanford L Arkin Mattress construction
DE8903761U1 (en) * 1989-03-25 1989-05-24 Pongs Schaumstoffe Gmbh, 5100 Aachen, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027848A1 (en) * 1996-12-23 1998-07-02 Sleepyhead Manufacturing Company Limited Inner sprung articles and methods of formation
NL1017038C2 (en) * 2001-01-05 2002-07-15 Beter Bed Holding N V Mattress with spring elements, such as coil springs.
WO2002065879A1 (en) * 2001-01-05 2002-08-29 Beter Bed Holding N.V. Mattress, provided with spring elements, such as coil springs
US6948205B2 (en) 2001-01-05 2005-09-27 Beter Bed Holding N.V. Mattress, provided with spring elements, such as coil springs
GB2434092A (en) * 2005-12-29 2007-07-18 Harrison A Mattresses

Also Published As

Publication number Publication date
NL8902704A (en) 1991-06-03

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