US3562825A - Mattress construction and plastic net spring bridging element for use therein - Google Patents
Mattress construction and plastic net spring bridging element for use therein Download PDFInfo
- Publication number
- US3562825A US3562825A US808231A US3562825DA US3562825A US 3562825 A US3562825 A US 3562825A US 808231 A US808231 A US 808231A US 3562825D A US3562825D A US 3562825DA US 3562825 A US3562825 A US 3562825A
- Authority
- US
- United States
- Prior art keywords
- strands
- wire
- rope
- spring
- plastic net
- 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.)
- Expired - Lifetime
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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
-
- Y—GENERAL 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/81—Plastic net
Definitions
- the cushioning material commonly a cotton batt
- a cotton scrim sewed to each face thereof to permit handling during manufacture and for other purposes.
- One object of the invention is to reduce the number of parts in a mattress construction by utilizing a single plastic net spring bridging element stitched to the cotton batt thus eliminating one of the two cotton scrims and the former wire and rope spring bridging element.
- Another object of this invention is to simplify mattress construction by utilizing fewer materials.
- Another object of this invention is to simplify the method of manufacturing mattresses by eliminating one of the steps required in manufacture.
- FIG. 1 is a schematic showing of the assembly of a pad for mattresses
- FIG. 2 shows the plastic net spring bridging element of this invention
- FIG. 3 is a perspective view of the plastic net of FIG. 2, and
- FIG. 4 is a cross section of a portion of a mattress construction utilizing the spring bridging element of FIG. 2.
- one of the more common means of constructing a mattress is to first build a spring foundation of coil springs tied together by wire ties of various kinds including, particularly, long coil springs wound across the outer coils of the main springs and attached at their ends to the wire border of the mattress.
- a wire and rope spring bridging element is then laid over the spring foundation.
- This wire and rope spring bridging element may be of the open or of the woven variety. In the so-called open variety a plurality of strands of twisted paper rope or other like cord are arranged parallel on various spacings varying, for example, from 1 inch to 5 inches or more on center.
- a plurality of Wire strands are arranged in the opposite direction and passing through the twisted paper rope which wire strands may vary similarly from 1 inch to 5 inches or more on center.
- the wire is shot through a layer of burlap.
- the wire element or strands are typically a 19 gauge tempered steel wire.
- a carding machine such as a carding machine, one variety of which is referred to as a garnett machine.
- Such machines comb the cotton fibers into a loose batt which is then further provided with a cotton scrim on each side by sewing the scrim to the batt thus providing a more handleable batt.
- a topper comprising a cushioning material to provide feel, such as a polyurethane foam, and the outer ticking are also applied to one surface of the cotton batt over the cotton scrim and sewed to the cotton batt as a unit at the same time the two cotton scrims are provided. This latter method is commonly done when a scroll pattern is desired on a deep quilted mattress.
- the upper layer of cushioning material and the ticking (frequently called the topper) is not sewn as a unit to the cotton batt the same will be separately sewed and applied.
- the cotton batt, sewn together as above described, is then applied over the wire and rope spring bridging unit and the topper (if not incorporated in the pad) is then applied and the mattress finished at the borders.
- the wire and rope spring bridging element is provided to distribute the weight of sleeping occupants and bridge the spaces Within and between springs and to provide a stiffness to the mattress. In some instances this wire and rope spring bridging element is used only at the center of the mattress due to its cost; however, it frequently covers the entire mattress, particularly in the better quality of mattress. In any event, it is necessary to cut the wire and rope spring bridging element from a roll to the appropriate size and to apply the same to the spring foundation and secure the same thereto as by hog rings or other known mechanisms.
- This invention is directed to a specific plastic net spring bridging element which not only replaces the wire and rope bridging element but also replaces the sewable cotton scrim on one side of the cotton batt when the mattress pad is formed.
- a specific plastic net spring bridging element which not only replaces the wire and rope bridging element but also replaces the sewable cotton scrim on one side of the cotton batt when the mattress pad is formed.
- the cotton batt portion 10 of the mattress pad is first formed in any suitable conventional forming means such as a garnett, indicated at 12.
- the cotton batt 10 is then conveyed to a suitable conventional stitching machine 14 which stitches through the batt 10 by means of a gang of needles generally indicated at 16.
- the mattress pad 26 is then taken from the roll, cut to appropriate size, and applied to the spring base. If the mattress pad 26 includes the topper the entire construction is applied to the spring base or foundation in one step whereas otherwise the topper must be separately applied.
- the plastic net of this invention is preferably an extruded plastic net having two sets of parallel strands with the strands of one set crossing the strands of the other set at substantially a right angle.
- a net may be readily extruded by use of the method and apparatus disclosed in United States Pat. No. 3,252,181.
- the particular construction of the net 20 of this invention as shown in FIGS. 2 and 3, comprises a plurality of parallel strands 34 forming one set of strands and a plurality of strands 36 forming a second set of strands.
- the plastic net of the invention may be utilized in place of the extremely strong wire and rope bridging element previously used, even though the plastic net of the invention is considerably less stiff and has considerably less tensile strength as indicated by tests referred to below.
- a sample of wire and rope having wires 0.95" on center and made up from wires of 19 gauge tempered steel wire was tested for tensile strength both along the wire strand direction and transverse thereto.
- a plastic net sample of this invention having a heavy strand 0.066" in diameter and a light strand 0.016" in diameter with the heavy strands on 1 /2" centers and the smaller strands on A" centers was also tested for tensile strength in each direction with the following results:
- Plastic net assembly 20,000 cycles (test stopped at 20,000 cycles-no visible deterioration).
- stiffness is an important criterion in a spring bridging element since it relates to the ability to distribute the load and to the firmness of the ultimate mattress
- two samples like those used in Tables I and II were tested by a deflection test to determine the flexibility along the length of the bridging strand and transverse thereto.
- the test involved placing a 12" by 12" sample flat on a table with 6" overhanging the edge of the table. The distance from the outer edge of the material to the floor was then measured. Weights were added to the samples to achieve is then applied over the mattress pad 26 if the same is a deflection downwardly of at least 1". The distance from (Stiffness) Deflection 0.469 lbs/in.
- Wire and rope (wire direction) Plastic net (heavy strand direction) 0.082 lbs/in. Wire and rope (transverse to wire direction) Deflected under its own weight. Plastic net (light strand direction) Deflected under its own weight.
- the preferred polymeric material for the plastic is a polypropylene although other extrudable plastic materials may be used.
- the upper surfaces 35 of the strands 34 substantially flat and substantially co-planar with the upper substantially flat surfaces 37 of the strands 36.
- the net 20 is arranged with the relatively fiat co-planar surfaces 35, 37 of the strands 34, 36 respectively adjacent to the cotton batt 10; it is believed, but not known, that the substantially flat and substantially co-planar surfaces 35, 37 provide a smoother and flatter support for the cotton batt 10 than was previously the case with the wire and rope construction in which the wire and rope were of different diameters and in which the wire passed through the rope substantially centrally thereof. With the wire and rope the upper surfaces of the wire and the rope were at different levels and as such tended to abrade the adjacent surface of the cotton batt 10.
- a spring cushion structure comprising a resilient metal wire spring foundation presenting a face with open spaces between a plurality of small wires in said face, said open spaces being large relative to said wires, cushioning material supported by said face, an open mesh net interposed between said face and said cushioning material, said net having a plurality of sets of polymeric plastic strands, strands of one of said sets crossing strands of another set at an angle, the strands of said one set being larger in cross section and stilfer than the strands of the crossing set, strands of said one set bridging said open spaces between said small wires, the upper surfaces of strands of said one set being substantially co-planar with the upper surfaces of strands of said crossing set.
- a spring bridging unit for bridging the spaces within and between the spring wires at the face of a spring foundation comprising an open mesh net material, said net having a plurality of sets of polymeric plastic strands, strands of one of said sets crossing strands of another set at an angle, the strands of said one set being larger in cross section and stiffer than the strands of the crossing set, the crossings of strands of said one set with strands of the crossing set being joints, said joints being integral with the strands forming said joints, and the upper surfaces of strands of said one set being substantially coplanar with the upper surfaces of strands of said crossing set.
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- Laminated Bodies (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80823169A | 1969-03-18 | 1969-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3562825A true US3562825A (en) | 1971-02-16 |
Family
ID=25198237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US808231A Expired - Lifetime US3562825A (en) | 1969-03-18 | 1969-03-18 | Mattress construction and plastic net spring bridging element for use therein |
Country Status (1)
Country | Link |
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US (1) | US3562825A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3814030A (en) * | 1971-08-04 | 1974-06-04 | R Morgan | Foraminous support platforms |
US4432109A (en) * | 1982-01-25 | 1984-02-21 | Conwed Corporation | Plastic support platform for mattress structure |
US4888846A (en) * | 1988-01-05 | 1989-12-26 | Gpac, Inc. | Asbestos scraper |
US5028466A (en) * | 1986-04-01 | 1991-07-02 | Trotignon Jean Pierre | Extruder for continuously extruding a wall having a three-dimensional cellular structure, and a cellular wall provided thereby |
US5156495A (en) * | 1978-10-16 | 1992-10-20 | P. L. G. Research Limited | Plastic material mesh structure |
US5419659A (en) * | 1978-10-16 | 1995-05-30 | P.L.G. Research Limited | Plastic material mesh structure |
US6290800B1 (en) | 1999-12-02 | 2001-09-18 | Steven J. Antinori | Machine for and a method of manufacturing a laminate particularly adapted for bedding, padding, and upholstering |
US20110067215A1 (en) * | 2003-11-10 | 2011-03-24 | Denver Mattress Co. Llc | High comfort mattresses having fiberballs |
US20120099933A1 (en) * | 2010-10-20 | 2012-04-26 | Tenax S.P.A. | Reinforcing net structure for geotechnical applications, use of the reinforcing net structure, and a method for production of the reinforcing net structure |
-
1969
- 1969-03-18 US US808231A patent/US3562825A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3814030A (en) * | 1971-08-04 | 1974-06-04 | R Morgan | Foraminous support platforms |
US5156495A (en) * | 1978-10-16 | 1992-10-20 | P. L. G. Research Limited | Plastic material mesh structure |
US5419659A (en) * | 1978-10-16 | 1995-05-30 | P.L.G. Research Limited | Plastic material mesh structure |
US4432109A (en) * | 1982-01-25 | 1984-02-21 | Conwed Corporation | Plastic support platform for mattress structure |
US5028466A (en) * | 1986-04-01 | 1991-07-02 | Trotignon Jean Pierre | Extruder for continuously extruding a wall having a three-dimensional cellular structure, and a cellular wall provided thereby |
US4888846A (en) * | 1988-01-05 | 1989-12-26 | Gpac, Inc. | Asbestos scraper |
US6290800B1 (en) | 1999-12-02 | 2001-09-18 | Steven J. Antinori | Machine for and a method of manufacturing a laminate particularly adapted for bedding, padding, and upholstering |
US20110067215A1 (en) * | 2003-11-10 | 2011-03-24 | Denver Mattress Co. Llc | High comfort mattresses having fiberballs |
US8448315B2 (en) * | 2003-11-10 | 2013-05-28 | Denver Mattress Co., Llc | High comfort mattresses having fiberballs |
US20120099933A1 (en) * | 2010-10-20 | 2012-04-26 | Tenax S.P.A. | Reinforcing net structure for geotechnical applications, use of the reinforcing net structure, and a method for production of the reinforcing net structure |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LEUCADIA, INC., A CORP. OF NEW YORK,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONWED CORPORATION, A CORP. OF DE.;REEL/FRAME:004660/0016 Effective date: 19861204 Owner name: LEUCADIA, INC., A CORP OF NY.,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONWED CORPORATION;REEL/FRAME:004655/0504 Effective date: 19861204 Owner name: LEUCADIA, INC., 315 PARK AVENUE SOUTH, NEW YORK, N Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONWED CORPORATION, A CORP. OF DE.;REEL/FRAME:004660/0016 Effective date: 19861204 Owner name: LEUCADIA, INC., 315 PARK AVENUE SOUTH, NEW YORK, N Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONWED CORPORATION;REEL/FRAME:004655/0504 Effective date: 19861204 |