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USRE35453E - Spring unit assembly - Google Patents

Spring unit assembly Download PDF

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Publication number
USRE35453E
USRE35453E US08/412,701 US41270195A USRE35453E US RE35453 E USRE35453 E US RE35453E US 41270195 A US41270195 A US 41270195A US RE35453 E USRE35453 E US RE35453E
Authority
US
United States
Prior art keywords
webs
spring unit
insertion device
spring
sewing machine
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
Application number
US08/412,701
Inventor
Paul Rodgers
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.)
Slumberland PLC
Original Assignee
Slumberland PLC
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 Slumberland PLC filed Critical Slumberland PLC
Priority to US08/412,701 priority Critical patent/USRE35453E/en
Application granted granted Critical
Publication of USRE35453E publication Critical patent/USRE35453E/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/063—Spring inlays wrapped or otherwise protected
    • A47C27/064—Pocketed springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G9/00—Placing upholstery springs in pockets; Fitting springs in upholstery

Definitions

  • This invention relates to apparatus for and a method of assembling and encapsulating spring units for use in mattresses or other upholstery units.
  • spring unit means a plurality of spring coils arranged spatially in file and joined together by wire.
  • the spring coils and joining wire may be formed separately and joined by a length or lengths of wire.
  • web used herein is to be construed as meaning cloth, fabric, laminated material or any other material used in, or capable of being used in, the production of mattresses and other upholstery units.
  • apparatus for encapsulating spring units as hereinbefore defined between a pair of webs as hereinbefore defined comprising an insertion device for inserting a spring unit between the pair of webs, means for tightening or tensioning the webs about the spring unit, compression means for compressing the spring unit, and securing means for securing the webs together in close proximity of the compressed spring unit to encapsulate same.
  • the securing means is a long arm sewing machine.
  • it could be a heat sealer depending upon the constitution of the webs.
  • the spring unit insertion device is preferably in channel or trough-shaped member which is withdrawable before, or as, the webs are tightened around the spring unit.
  • the web tensioning means comprises, at one side of the long arm sewing machine, a direction-reversible roller unit between which the webs are fed and, at the other side of the long arm sewing machine, a reciprocable puller bar.
  • the spring unit compression means is a pair of oppositely-movable pressing plates controlled by pneumatic rams.
  • a method of encapsulating spring units between a pair of webs the method compressing inserting a spring until between a pair of webs connected together along a line parallel with the spring unit, tensioning the webs around the spring unit, compressing the spring unit, and, while compressed, connecting the webs together in close proximity to the compressed spring unit at the other side of the spring unit from the first mentioned line of connection.
  • FIG. 1 is a side view of a long arm sewing machine used in the apparatus of the present invention
  • FIG. 2 is an end view of the sewing machine
  • FIG. 3 is a general view of the layout of the apparatus according to the present invention and illustrating a first method step
  • FIGS. 4 to 6 respectively illustrate the second, third and final actions of the apparatus.
  • the spring unit assembling and encapsulating apparatus comprises a long arm sewing machine 10 movable to-and-fro along a track 11, a web conveying and tensioning system 12, a spring unit insertion device 13, and a spring unit compression device 14.
  • the long arm sewing machine 10 comprises parallel arms 15 between which parallel lengths of web 16 can pass the sewing machine 17 being carried laterally of the arms 15.
  • the sewing machine needle and bedplate are respectively indicated at 18 and 19 respectively.
  • the long arm sewing machine 10 is movable to-and-fro along the track 11 by an endless chain 20 driven by a reversible motor 21 and gear transmission 22, the sewing machine 10 being coupled to the endless chain 20 by a mechanical coupler 23 of any convenient form and being provided with wheels 24 for running along the track 11.
  • the effective stitching line of the long arm sewing machine 10 is indicated at 25.
  • the web conveying and tensioning system 12 comprises, at one side of the long arm sewing machine 10, a pair of direction-reversible, driven puller rollers 26, and, at the other side, a puller bar 27 releasably mounted on a carriage 28 which is movable to-and-fro as indicated at 29 across a pull-off table 30 by a motor 31 and suitable transmission (not shown).
  • the spring unit compression device 14 comprises a pair of double-acting pneumatic rams 34, whereof the piston rods are indicated at 35 and pressure plates at 36.
  • the latter have lateral plates 37 which ensure that only one spring unit 30-40 at a time is within the compression device 14.
  • two webs 16 are fed between the roller 26, are stitched together at 41, and the puller bar 27 is inserted therebetween and is then mounted on the carriage 28.
  • the compression unit 14 is then opened and the rollers 26 and the carriage 28 to move the encapsulated spring unit 38 away from the sewing machine 17 (FIG. 6).
  • a second spring unit 39 is then slid as aforesaid between the webs 16, is compressed, and is encapsulated by stitching as aforesaid, the rollers 26 pulling the webs 16 to tighten same around the second spring unit 39 prior to compression and encapsulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Sewing Machines And Sewing (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Springs (AREA)
  • Automatic Assembly (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Telephone Function (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Advancing Webs (AREA)

Abstract

Apparatus for encapsulating spring units (38-40) is disclosed. The apparatus comprises a device (13) for inserting a spring unit between a pair of webs (16), a device (26) for tightening or tensioning the webs about the spring unit, and a securing device for securing the webs together in close proximity to the compressed spring unit to encapsulate same. A method for encapsulating spring units is also disclosed.

Description

This application is a continuation of prior copending international PCT Application No. PCT/GB90/01602, filed Oct. 17, 1990, the benefit of the filing date which is hereby claimed under 35 U.S.C §120..Iaddend.
This invention relates to apparatus for and a method of assembling and encapsulating spring units for use in mattresses or other upholstery units.
The term "spring unit" used herein means a plurality of spring coils arranged spatially in file and joined together by wire. The spring coils and joining wire may be formed separately and joined by a length or lengths of wire.
The term "web" used herein is to be construed as meaning cloth, fabric, laminated material or any other material used in, or capable of being used in, the production of mattresses and other upholstery units.
It is the aim of the present invention to provide an effective and economically viable apparatus for and method of providing assemblies of spring units for use in mattresses or other upholstery units.
According to one aspect of the present invention there is provided apparatus for encapsulating spring units as hereinbefore defined between a pair of webs as hereinbefore defined, the apparatus comprising an insertion device for inserting a spring unit between the pair of webs, means for tightening or tensioning the webs about the spring unit, compression means for compressing the spring unit, and securing means for securing the webs together in close proximity of the compressed spring unit to encapsulate same.
Preferably the securing means is a long arm sewing machine. Alternatively it could be a heat sealer depending upon the constitution of the webs.
The spring unit insertion device is preferably in channel or trough-shaped member which is withdrawable before, or as, the webs are tightened around the spring unit.
Preferably the web tensioning means comprises, at one side of the long arm sewing machine, a direction-reversible roller unit between which the webs are fed and, at the other side of the long arm sewing machine, a reciprocable puller bar.
Any other convenient tensioning arrangement can be employed.
Preferably the spring unit compression means is a pair of oppositely-movable pressing plates controlled by pneumatic rams.
Also according to another aspect of the present invention there is provided a method of encapsulating spring units between a pair of webs, the method compressing inserting a spring until between a pair of webs connected together along a line parallel with the spring unit, tensioning the webs around the spring unit, compressing the spring unit, and, while compressed, connecting the webs together in close proximity to the compressed spring unit at the other side of the spring unit from the first mentioned line of connection.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings in which:
FIG. 1 is a side view of a long arm sewing machine used in the apparatus of the present invention;
FIG. 2 is an end view of the sewing machine;
FIG. 3 is a general view of the layout of the apparatus according to the present invention and illustrating a first method step; and
FIGS. 4 to 6 respectively illustrate the second, third and final actions of the apparatus.
The spring unit assembling and encapsulating apparatus comprises a long arm sewing machine 10 movable to-and-fro along a track 11, a web conveying and tensioning system 12, a spring unit insertion device 13, and a spring unit compression device 14.
The general layout of the apparatus is most clearly seen in FIG. 3.
The long arm sewing machine 10 comprises parallel arms 15 between which parallel lengths of web 16 can pass the sewing machine 17 being carried laterally of the arms 15.
The sewing machine needle and bedplate are respectively indicated at 18 and 19 respectively.
The long arm sewing machine 10 is movable to-and-fro along the track 11 by an endless chain 20 driven by a reversible motor 21 and gear transmission 22, the sewing machine 10 being coupled to the endless chain 20 by a mechanical coupler 23 of any convenient form and being provided with wheels 24 for running along the track 11.
The effective stitching line of the long arm sewing machine 10 is indicated at 25.
The web conveying and tensioning system 12 comprises, at one side of the long arm sewing machine 10, a pair of direction-reversible, driven puller rollers 26, and, at the other side, a puller bar 27 releasably mounted on a carriage 28 which is movable to-and-fro as indicated at 29 across a pull-off table 30 by a motor 31 and suitable transmission (not shown).
The spring unit insertion device 13 is a channel or trough-shaped member 32 insertable manually or by power means, for example a ram, between the lengths of web 16. The channel or trough-shaped member 32 thus reciprocable to-and-fro in the direction of arrow 33.
The spring unit compression device 14 comprises a pair of double-acting pneumatic rams 34, whereof the piston rods are indicated at 35 and pressure plates at 36. The latter have lateral plates 37 which ensure that only one spring unit 30-40 at a time is within the compression device 14.
The use of a long arm sewing machine 10 permits lines of stitching to be effected very close to the spring unit compression device 14, for example as close to 20 mm. or thereabouts.
In use, two webs 16 are fed between the roller 26, are stitched together at 41, and the puller bar 27 is inserted therebetween and is then mounted on the carriage 28.
A first spring unit 38 is disposed in the channel or trough member 32 and inserted between the webs 16 at the compression unit 14 (FIG. 4), the rollers 26 being operated to tension the webs 16 around the spring unit 38, the channel or trough member 32 then being withdrawn, the compression unit 14 operated to compress the spring unit 38 and the long arm sewing machine 10 operated to stitch the webs 16 together closely adjacent the compressed spring unit 38 to encapsulate same (FIG. 5).
The compression unit 14 is then opened and the rollers 26 and the carriage 28 to move the encapsulated spring unit 38 away from the sewing machine 17 (FIG. 6).
A second spring unit 39 is then slid as aforesaid between the webs 16, is compressed, and is encapsulated by stitching as aforesaid, the rollers 26 pulling the webs 16 to tighten same around the second spring unit 39 prior to compression and encapsulation.
This action is repeated until all spring units are encapsulated.
The end product is a series of parallel spring units 38-40 individually encapsulated under compression between the webs 16.
The ends of the webs 16 at right angles to the spring units 38-40 are closed by stitching for example, and the encapsulated spring unit assembly can then be encased to form a mattress or other upholstery unit.

Claims (6)

I claim:
1. Apparatus for encapsulating spring units between a pair of webs, comprising means for moving said webs in a first longitudinal direction through intermittent steps, an insertion device for holding said spring unit therein and for inserting a spring unit between said pair of webs, by linear movement in a second transverse direction normal to said first longitudinal direction, means for moving said insertion device through a linear path in said second transverse direction between a withdrawn spring unit receiving position spaced from said webs to receive a spring unit within said insertion device and an inserted position in which said insertion device is disposed between said webs, means for tightening or tensioning said webs around said spring insertion device, compression means outside of the webs for compressing said inserted spring unit within said webs into a compressed spring unit, means for withdrawing said insertion device from said inserted position to said withdrawn position as said webs are tightened around said compressed spring unit to retain said spring unit between said webs, and securing means also movable in said second direction for securing said webs together in close proximity to said spring unit to encapsulate said spring unit.
2. Apparatus according to claim 1, in which said securing means comprises a long arm sewing machine.
3. Apparatus according to claim 2, in which said means for tightening or tensioning said webs comprises, at one side of said long arm sewing machine, a direction reversible roller unit between which said webs are fed, and at the other side of said long arm sewing machine, a reciprocable puller bar.
4. Apparatus according to claim 1, in which said securing means comprises a heat sealer.
5. Apparatus according to claim 1, in which said insertion device comprises a channel or trough-shaped member adapted to be withdrawn from said webs as said webs are tightening around said spring unit.
6. Apparatus according to claim 1, in which said means for compressing said spring unit comprises a pair of oppositely-movable pressing plates, and pneumatic rams for controlling said pressing plates.
US08/412,701 1989-10-18 1995-03-29 Spring unit assembly Expired - Lifetime USRE35453E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/412,701 USRE35453E (en) 1989-10-18 1995-03-29 Spring unit assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8923528 1989-10-18
GB898923528A GB8923528D0 (en) 1989-10-18 1989-10-18 Spring unit assembly
US07/870,628 US5303530A (en) 1989-10-18 1992-04-17 Spring unit assembly
US08/412,701 USRE35453E (en) 1989-10-18 1995-03-29 Spring unit assembly

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07/870,628 Reissue US5303530A (en) 1989-10-18 1992-04-17 Spring unit assembly

Publications (1)

Publication Number Publication Date
USRE35453E true USRE35453E (en) 1997-02-18

Family

ID=10664804

Family Applications (3)

Application Number Title Priority Date Filing Date
US07/870,628 Ceased US5303530A (en) 1989-10-18 1992-04-17 Spring unit assembly
US08/183,158 Expired - Lifetime US5497600A (en) 1989-10-18 1994-01-18 Method of encapsulating spring units
US08/412,701 Expired - Lifetime USRE35453E (en) 1989-10-18 1995-03-29 Spring unit assembly

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US07/870,628 Ceased US5303530A (en) 1989-10-18 1992-04-17 Spring unit assembly
US08/183,158 Expired - Lifetime US5497600A (en) 1989-10-18 1994-01-18 Method of encapsulating spring units

Country Status (16)

Country Link
US (3) US5303530A (en)
EP (1) EP0496774B1 (en)
JP (1) JPH0642917B2 (en)
KR (1) KR0149871B1 (en)
AT (1) ATE117658T1 (en)
AU (1) AU645270B2 (en)
DE (1) DE69016450T2 (en)
DK (1) DK0496774T3 (en)
ES (1) ES2067046T3 (en)
GB (1) GB8923528D0 (en)
GR (1) GR3015543T3 (en)
HU (1) HU213139B (en)
MY (1) MY110218A (en)
NZ (1) NZ235733A (en)
WO (1) WO1991005732A1 (en)
ZA (1) ZA908310B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047830A3 (en) * 1998-03-16 1999-11-11 L & P Property Management Co Spring retainer assembly
WO2000011370A1 (en) * 1998-08-25 2000-03-02 L & P Property Management Company Manufacture of pocketed compound nested coil springs
US6216788B1 (en) 1999-11-10 2001-04-17 Baker Hughes Incorporated Sand protection system for electrical submersible pump
US6591438B1 (en) * 1999-03-25 2003-07-15 Stjernfjadrar Ab Retracted pocket spring mattress; method for manufacturing of a pocket spring mattress and device for pre-tensioning pocketed coil spings

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9210704U1 (en) * 1992-08-11 1993-09-09 Spühl AG, St. Gallen Device for transferring spring chains of a pocket spring mattress to a further processing station
GB9301927D0 (en) * 1993-02-01 1993-03-17 Spring Quilt Ind Ltd Pocket spring assemblies
US6029957A (en) 1994-02-01 2000-02-29 Furniture Row Technologies, Llc Manufacture of pocket spring assemblies
GB9404850D0 (en) * 1994-03-12 1994-04-27 Slumberland Plc Spring assemblies for mattresses and the like
US5572853A (en) * 1994-08-15 1996-11-12 Simmons Company Method and apparatus for conditioning pocketed coil springs
SE504366C2 (en) * 1995-05-08 1997-01-20 Dux Ind Ab Way and machine to provide a spring mattress path
US6315275B1 (en) 1995-09-18 2001-11-13 Furniture Row Technologies, Llc Pocket spring assembly and methods
GB9607497D0 (en) * 1996-04-11 1996-06-12 Slumberland Plc Spring units for mattresses and the like
FR2751248B1 (en) * 1996-07-18 1998-10-09 Oniris Sa METHOD OF ASSEMBLING A MATTRESS MADE FROM CHAINS OF BAGGED SPRINGS
US6021627A (en) * 1998-08-24 2000-02-08 L & P Property Management Company Manufacture of pocketed compound nested coil springs
FR2795712B1 (en) * 1999-07-01 2001-09-21 Oniris Sa PROCESS FOR THE MANUFACTURE OF A SPRING MATTRESS FRAME
US20030132330A1 (en) * 2000-02-15 2003-07-17 Ryuzou Kubota Toilet paper roll and method of manufacturing the paper roll
US6632474B1 (en) * 2000-10-13 2003-10-14 Headway Technologies, Inc. Robust hard bias/conductor lead structures for future GMR heads
KR100940832B1 (en) * 2009-07-31 2010-02-04 주식회사지엠피 Packing method of document bookbinding binder ring and packing structure
EP2813463A1 (en) * 2013-06-14 2014-12-17 Spühl AG Apparatus and method for forming a string of pocket springs
US8978183B1 (en) * 2014-01-08 2015-03-17 L&P Property Management Company Pocketed spring assembly
US11076705B2 (en) * 2014-05-30 2021-08-03 Sealy Technology, Llc Spring core with integrated cushioning layer
US9370252B2 (en) 2014-06-17 2016-06-21 L&P Property Management Company Pocketed spring assembly
US11109686B2 (en) * 2018-06-13 2021-09-07 L&P Property Management Company Method of making a continuous string of pocketed springs
EP3670437B1 (en) 2018-12-21 2021-07-07 Spühl GmbH Multi-conveyor belt based insertion mechanism for pocketed coil springs
CN110844212B (en) * 2020-01-03 2021-12-14 四川省胡婆婆食品有限责任公司 A kind of food automatic packaging equipment

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FR655328A (en) * 1928-05-08 1929-04-17 Simmons Co Method and machine for making elastic mattresses and the like
US1813993A (en) * 1926-02-26 1931-07-14 Simmons Co Machine for and method of assembling springs
US1994043A (en) * 1932-01-30 1935-03-12 Karpen & Bros S Upholstery spring inserting machine
CH176699A (en) * 1934-03-28 1935-04-30 Emil & Julius Spuehl Machine for the production of pocket straps for upholstery and mattresses filled with springs.
US2430098A (en) * 1944-03-10 1947-11-04 William Rhodes Ltd Pocket spring surfaces
US2983236A (en) * 1958-03-24 1961-05-09 Marspring Corp Apparatus for making lengths of fabric-pocketed spring coils
US3668816A (en) * 1970-07-10 1972-06-13 Mildred B Thompson Method and apparatus for constructing fabric enclosed springs
DE2905096B1 (en) * 1979-02-10 1980-06-19 Langenscheidt Ernst Maschf Process for the manufacture of pocket belts for spring cores of upholstery, in particular mattresses
US4377061A (en) * 1978-08-28 1983-03-22 Tex Innovation Ab Horizontal packaging apparatus
US4439977A (en) * 1977-05-05 1984-04-03 Simmons U.S.A. Corporation Method and apparatus for making a series of pocketed coil springs
US4800707A (en) * 1986-10-20 1989-01-31 Package Machinery Company Vertical form, fill & seal packaging machine with servo motor drive means
US4854023A (en) * 1988-06-13 1989-08-08 Simmons U.S.A. Corporation Method for providing pocketed coil strings having a flat overlap side seam

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SE324440B (en) * 1968-01-26 1970-06-01 John Gustav Jansson
US3686820A (en) * 1970-04-16 1972-08-29 Nat Can Corp Automated handling system for articles

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1813993A (en) * 1926-02-26 1931-07-14 Simmons Co Machine for and method of assembling springs
FR655328A (en) * 1928-05-08 1929-04-17 Simmons Co Method and machine for making elastic mattresses and the like
US1994043A (en) * 1932-01-30 1935-03-12 Karpen & Bros S Upholstery spring inserting machine
CH176699A (en) * 1934-03-28 1935-04-30 Emil & Julius Spuehl Machine for the production of pocket straps for upholstery and mattresses filled with springs.
US2430098A (en) * 1944-03-10 1947-11-04 William Rhodes Ltd Pocket spring surfaces
US2983236A (en) * 1958-03-24 1961-05-09 Marspring Corp Apparatus for making lengths of fabric-pocketed spring coils
US3668816A (en) * 1970-07-10 1972-06-13 Mildred B Thompson Method and apparatus for constructing fabric enclosed springs
US4439977A (en) * 1977-05-05 1984-04-03 Simmons U.S.A. Corporation Method and apparatus for making a series of pocketed coil springs
US4377061A (en) * 1978-08-28 1983-03-22 Tex Innovation Ab Horizontal packaging apparatus
DE2905096B1 (en) * 1979-02-10 1980-06-19 Langenscheidt Ernst Maschf Process for the manufacture of pocket belts for spring cores of upholstery, in particular mattresses
US4800707A (en) * 1986-10-20 1989-01-31 Package Machinery Company Vertical form, fill & seal packaging machine with servo motor drive means
US4854023A (en) * 1988-06-13 1989-08-08 Simmons U.S.A. Corporation Method for providing pocketed coil strings having a flat overlap side seam

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999047830A3 (en) * 1998-03-16 1999-11-11 L & P Property Management Co Spring retainer assembly
WO2000011370A1 (en) * 1998-08-25 2000-03-02 L & P Property Management Company Manufacture of pocketed compound nested coil springs
US6408514B1 (en) 1998-08-25 2002-06-25 L&P Property Management Company Manufacture of pocketed compound nested coil springs
US6591438B1 (en) * 1999-03-25 2003-07-15 Stjernfjadrar Ab Retracted pocket spring mattress; method for manufacturing of a pocket spring mattress and device for pre-tensioning pocketed coil spings
US6216788B1 (en) 1999-11-10 2001-04-17 Baker Hughes Incorporated Sand protection system for electrical submersible pump

Also Published As

Publication number Publication date
NZ235733A (en) 1992-04-28
EP0496774A1 (en) 1992-08-05
EP0496774B1 (en) 1995-01-25
AU645270B2 (en) 1994-01-13
AU6536890A (en) 1991-05-16
HU213139B (en) 1997-02-28
JPH05500913A (en) 1993-02-25
ZA908310B (en) 1992-03-25
DE69016450T2 (en) 1995-05-24
GR3015543T3 (en) 1995-06-30
ATE117658T1 (en) 1995-02-15
HU9201284D0 (en) 1992-08-28
US5497600A (en) 1996-03-12
WO1991005732A1 (en) 1991-05-02
US5303530A (en) 1994-04-19
KR0149871B1 (en) 1999-03-30
DE69016450D1 (en) 1995-03-09
DK0496774T3 (en) 1995-05-08
MY110218A (en) 1998-03-31
GB8923528D0 (en) 1989-12-06
ES2067046T3 (en) 1995-03-16
JPH0642917B2 (en) 1994-06-08
HUT63116A (en) 1993-07-28

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