US3311007A - Forming of foamed material articles - Google Patents

Forming of foamed material articles Download PDF

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Publication number
US3311007A
US3311007A US48935565A US3311007A US 3311007 A US3311007 A US 3311007A US 48935565 A US48935565 A US 48935565A US 3311007 A US3311007 A US 3311007A
Authority
US
United States
Prior art keywords
pad
former
male
foamed material
domed
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
Inventor
Mcgee Robert
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.)
Vitafoam Ltd
Original Assignee
Vitafoam Ltd
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
Priority to NL6512212A priority Critical patent/NL6512212A/xx
Priority claimed from NL6512212A external-priority patent/NL6512212A/xx
Application filed by Vitafoam Ltd filed Critical Vitafoam Ltd
Priority to US48935565 priority patent/US3311007A/en
Priority to FR34484A priority patent/FR1449463A/en
Application granted granted Critical
Publication of US3311007A publication Critical patent/US3311007A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/28—Splitting layers from work; Mutually separating layers by cutting
    • B26D3/281—Splitting layers from work; Mutually separating layers by cutting the work being simultaneously deformed by the application of pressure to obtain profiled workpieces
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/02—Other than completely through work thickness
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/343—With means to deform work temporarily
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/654—With work-constraining means on work conveyor [i.e., "work-carrier"]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/707—By endless band or chain knife
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • Y10T83/7547—Liquid pressure actuating means

Definitions

  • This invention relates to apparatus for producing a contoured surface on a foamed material pad or the like, by cutting such pad while it is held between male and female formers.
  • the apparatus for producing at least one contoured surface upon a foamed material pad locates the face of the pad in contact with the face of a male former whose surface corresponds to the form required on the pad and applies pressure to the pad in a selected area or areas from its opposite face by means of a suitably shaped compression member to compress the pad to a greater extent in the high regions of the former than the low regions.
  • the apparatus cuts the pad in a straight line, for example with a band knife, and thereafter removes the pad whereby a greater amount of material is removed in the regions of lower compression than in the regions of higher compression, thus to form a pad having surface of the required contour.
  • apparatus for producing a foamed material pad having at least one contoured surface includes a male former having a face whose contour corresponds to that required in the pad, a female whose shape is such that varying compressive forces can be applied to selected areas of the pad, and means for cutting the pad in a fiat plane adjacent the former.
  • a former is produced and this consists of a framework consisting of base members .10 and support members 11 located at right angles thereto.
  • the support members 11 carry a domed male former 12 whose contour corresponds to that required on the seat pad.
  • Movable relative to the male former 12 is a pressure member which comprises a female former 13 carried by slidable rods 14.
  • the slidable rods 14 are mounted in a framework 15 which latter is mounted on a base 16.
  • a pressure plate 17 Secured to the slidable rods 14 is a pressure plate 17 to which is attached the ram 18 of a pneumatic cylinder 19.
  • the cylinder 19 is securely attached to the framework .15.
  • the female former 13 "ice is flat faced and has a peripheral rim 20, the former 13 thus resembles a tray.
  • the male former 12 is adapted to be secured upon the table of, for example, a band knife, (generally indicated by the reference 21) by means of studs which pass through the base members 10 and the band knife table 22.
  • the male former is so positioned that its domed surface is located adjacent to and in a plane parallel to the plane of the knife 23 of the band knife 21.
  • the female former 13 is also secured to the band knife table 22 by means of studs, the position of the former 13 is such that it is spaced from former 12 by a distance sufficient to enable an uncut pad 24 to be placed between the formers.
  • the flat sided pad 24 of, for example, foamed polyether material whose thickness exceeds the maximum thickness of the finished pad is placed in position between the male former 12 and the female former 13.
  • the female former 13 is pushed towards the male former 12 by pneumatic pressure from the cylinder 19 so that the face thereof adjacent the male former 12 is subjected to a smaller amount of compression around the edges of the male former .12 (the low region of the former) than in the centre (the high region) and thus the pad is compressed to a greater extent in the centre region than the edges.
  • the band knife table 22 is moved in the usual manner to cause the knife 23 to make a straight cut through the pad 24 in such a manner that a small clearance, in the region of one quarter of an inch, exists between the knife 23 and the highest part of the male former 12.
  • the pad 24 When the female former is released and the pad 24 is removed and allowed to return to its natural uncompressed condition it is found that the pad 24 has a convex domed surface.
  • the pad 24 is reversed and the oifcut retained in position on the pad 24 and the same procedure adopted for the formation of a convex dome on the opposite face.
  • the pad may be produced with concave domed surfaces.
  • the male former 12 would be concave in form and greatest pressure would be applied at the centre of the pad.
  • the material to be formed may, of course, be other than foamed polyether material and pads 24 other than seat pads can be produced.
  • the pads produced may have only one, or more than two contoured surfaces.
  • Apparatus for producing a contoured surface on a foamed material pad comprising a band knife including a table and a power operated knife adjacent to said table, a stationary male former having a contoured surface mounted on said table and closely adjacent to said knife, a framework mounted on said table, slidable rods mounted in said framework, a female former carried by said slidable rods for movement toward and away from said male member and for cooperatively holding a pad to be cut with said male former, fluid operated ram means mounted on said framework and attached to said rods for sliding the latter and consequently the female former in said directions toward and away from said male former, whereby a pad to be cut is held compressed between said formers for cutting by said knife and means supporting the table for movement transversely to the direction in which said female former is slidable.

Description

March 28, 1967 R. MCGEE 3,311,007
FORMING OF FOAMED MATERIAL ARTICLES Filed Sept. 22, 1965 I/VVENTOP.
' R Ma 6'55 United States Patent 3,311,007 FORMTNG F FOAMED MATERIAL ARTICLES Robert McGee, Cheadle Hulme, Cheshire, England, as-
signor to Vitafoam Limited, a corporation of Great Britain, Isle of Man, and Northern Ireland Filed Sept. 22, 1965, Ser. No. 489,355 1 Claim. (Cl. 831) This invention relates to apparatus for producing a contoured surface on a foamed material pad or the like, by cutting such pad while it is held between male and female formers.
In the past when a contoured, for example domed, seat pad has been required it has generally been fabricated by securing together a flat faced base pad, and for a single domed face, a fiat faced cover pad and locating therebetween and in the central region of the base pad a filler pad whose edges have been chamfered. For a pad having two domed faces a filler pad has been provided on each face of the base pad and a pair of cover pads have been used. Similarly when a more complex contour is required fabrication is used.
According to the present invention the apparatus for producing at least one contoured surface upon a foamed material pad locates the face of the pad in contact with the face of a male former whose surface corresponds to the form required on the pad and applies pressure to the pad in a selected area or areas from its opposite face by means of a suitably shaped compression member to compress the pad to a greater extent in the high regions of the former than the low regions. The apparatus cuts the pad in a straight line, for example with a band knife, and thereafter removes the pad whereby a greater amount of material is removed in the regions of lower compression than in the regions of higher compression, thus to form a pad having surface of the required contour.
According to a further feature of the present invention apparatus for producing a foamed material pad having at least one contoured surface includes a male former having a face whose contour corresponds to that required in the pad, a female whose shape is such that varying compressive forces can be applied to selected areas of the pad, and means for cutting the pad in a fiat plane adjacent the former.
The invention will be described further, by way of example, with reference to the accompanying drawing which illustrates in side elevation apparatus for forming a domed upholstery pad. In the following description a simple seat pad having two convex domed surfaces will be described but this does not restrict the invent-ion to the formation of this type of pad only.
To produce a convex domed seat pad a former is produced and this consists of a framework consisting of base members .10 and support members 11 located at right angles thereto. The support members 11 carry a domed male former 12 whose contour corresponds to that required on the seat pad. Movable relative to the male former 12 is a pressure member which comprises a female former 13 carried by slidable rods 14. The slidable rods 14 are mounted in a framework 15 which latter is mounted on a base 16. Secured to the slidable rods 14 is a pressure plate 17 to which is attached the ram 18 of a pneumatic cylinder 19. The cylinder 19 is securely attached to the framework .15. The female former 13 "ice is flat faced and has a peripheral rim 20, the former 13 thus resembles a tray.
The male former 12 is adapted to be secured upon the table of, for example, a band knife, (generally indicated by the reference 21) by means of studs which pass through the base members 10 and the band knife table 22. The male former is so positioned that its domed surface is located adjacent to and in a plane parallel to the plane of the knife 23 of the band knife 21. The female former 13 is also secured to the band knife table 22 by means of studs, the position of the former 13 is such that it is spaced from former 12 by a distance sufficient to enable an uncut pad 24 to be placed between the formers.
To produce the domed pad the flat sided pad 24 of, for example, foamed polyether material whose thickness exceeds the maximum thickness of the finished pad is placed in position between the male former 12 and the female former 13. The female former 13 is pushed towards the male former 12 by pneumatic pressure from the cylinder 19 so that the face thereof adjacent the male former 12 is subjected to a smaller amount of compression around the edges of the male former .12 (the low region of the former) than in the centre (the high region) and thus the pad is compressed to a greater extent in the centre region than the edges. The band knife table 22 is moved in the usual manner to cause the knife 23 to make a straight cut through the pad 24 in such a manner that a small clearance, in the region of one quarter of an inch, exists between the knife 23 and the highest part of the male former 12.
When the female former is released and the pad 24 is removed and allowed to return to its natural uncompressed condition it is found that the pad 24 has a convex domed surface. The pad 24 is reversed and the oifcut retained in position on the pad 24 and the same procedure adopted for the formation of a convex dome on the opposite face.
The invention is not restricted to the above details. For example, the pad may be produced with concave domed surfaces. In this case the male former 12 would be concave in form and greatest pressure would be applied at the centre of the pad. It is also possible to produce other contours and irregular doming using the same principle as that described above. It is also possible to use a hydraulic ram as opposed to the pneumatic ram referred to above.
The material to be formed may, of course, be other than foamed polyether material and pads 24 other than seat pads can be produced. The pads produced may have only one, or more than two contoured surfaces.
I claim:
Apparatus for producing a contoured surface on a foamed material pad, said apparatus comprising a band knife including a table and a power operated knife adjacent to said table, a stationary male former having a contoured surface mounted on said table and closely adjacent to said knife, a framework mounted on said table, slidable rods mounted in said framework, a female former carried by said slidable rods for movement toward and away from said male member and for cooperatively holding a pad to be cut with said male former, fluid operated ram means mounted on said framework and attached to said rods for sliding the latter and consequently the female former in said directions toward and away from said male former, whereby a pad to be cut is held compressed between said formers for cutting by said knife and means supporting the table for movement transversely to the direction in which said female former is slidable.
References Cited by the Examiner UNITED STATES PATENTS 3,154,607 10/1964 Struthers 8319 X 4 3,186,271 6/1965 Kaiser 834 3,245,293 4/1966 Kirchner 83176 FOREIGN PATENTS 572,515 1/1958 Italy.
ANDREW R. JUHASZ, Primary Examiner.
US48935565 1965-09-20 1965-09-22 Forming of foamed material articles Expired - Lifetime US3311007A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL6512212A NL6512212A (en) 1965-09-20 1965-09-20
US48935565 US3311007A (en) 1965-09-20 1965-09-22 Forming of foamed material articles
FR34484A FR1449463A (en) 1965-09-20 1965-10-11 Process for forming articles from expanded material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6512212A NL6512212A (en) 1965-09-20 1965-09-20
US48935565 US3311007A (en) 1965-09-20 1965-09-22 Forming of foamed material articles

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665792A (en) * 1970-02-20 1972-05-30 James S Bush Method and aparatus for forming foam material
US3736829A (en) * 1971-09-10 1973-06-05 M Pedi Slicer having automatic materials feed
US4879776A (en) * 1988-04-04 1989-11-14 Farley David L Anatomically conformable foam support pad
US5430901A (en) * 1993-06-10 1995-07-11 Farley; David L. Anatomically conformable therapeutic mattress overlay
USD381543S (en) * 1994-10-27 1997-07-29 Farley David L Foam pad
US5974609A (en) * 1998-06-29 1999-11-02 The Spring Air Company Quilt top mattress with convoluted foam cushion
US6003179A (en) * 1997-11-18 1999-12-21 Farley; David L. Inclined anatomic support surface
US6041459A (en) * 1997-10-03 2000-03-28 The Spring Air Company Convoluted foam cushion
US7044829B1 (en) 2005-02-17 2006-05-16 Victoria's Secret Stores Brand Management, Inc. Pad with rigid and stretchable foam
EP2764784A1 (en) 2004-03-19 2014-08-13 Mast Industries (Far East) Limited Bra pad
US20150231712A1 (en) * 2008-06-03 2015-08-20 Milwaukee Electric Tool Corporation Shoe accessory for a saw
US20180281217A1 (en) * 2015-10-08 2018-10-04 Precision Foam Technologies Pty Ltd Cutting machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154607A (en) * 1957-10-04 1964-10-27 Fiber Bond Corp Method of making a cushion
US3186271A (en) * 1961-07-08 1965-06-01 Kaiser Fritz Process and apparatus for the production of one-piece shaped articles of elastically deformable material
US3245293A (en) * 1964-02-27 1966-04-12 Hapad Inc Apparatus for making felt pads

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154607A (en) * 1957-10-04 1964-10-27 Fiber Bond Corp Method of making a cushion
US3186271A (en) * 1961-07-08 1965-06-01 Kaiser Fritz Process and apparatus for the production of one-piece shaped articles of elastically deformable material
US3245293A (en) * 1964-02-27 1966-04-12 Hapad Inc Apparatus for making felt pads

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665792A (en) * 1970-02-20 1972-05-30 James S Bush Method and aparatus for forming foam material
US3736829A (en) * 1971-09-10 1973-06-05 M Pedi Slicer having automatic materials feed
US4879776A (en) * 1988-04-04 1989-11-14 Farley David L Anatomically conformable foam support pad
US5038433A (en) * 1988-04-04 1991-08-13 Farley David L Anatomically conformable foam support pad
US5430901A (en) * 1993-06-10 1995-07-11 Farley; David L. Anatomically conformable therapeutic mattress overlay
USD381543S (en) * 1994-10-27 1997-07-29 Farley David L Foam pad
US6041459A (en) * 1997-10-03 2000-03-28 The Spring Air Company Convoluted foam cushion
US6003179A (en) * 1997-11-18 1999-12-21 Farley; David L. Inclined anatomic support surface
US5974609A (en) * 1998-06-29 1999-11-02 The Spring Air Company Quilt top mattress with convoluted foam cushion
EP2764784A1 (en) 2004-03-19 2014-08-13 Mast Industries (Far East) Limited Bra pad
US7044829B1 (en) 2005-02-17 2006-05-16 Victoria's Secret Stores Brand Management, Inc. Pad with rigid and stretchable foam
US20150231712A1 (en) * 2008-06-03 2015-08-20 Milwaukee Electric Tool Corporation Shoe accessory for a saw
US10357835B2 (en) * 2008-06-03 2019-07-23 Milwaukee Electric Tool Corporation Shoe accessory for a saw
US10953482B2 (en) 2008-06-03 2021-03-23 Milwaukee Electric Tool Corporation Shoe accessory for a saw
US20180281217A1 (en) * 2015-10-08 2018-10-04 Precision Foam Technologies Pty Ltd Cutting machine
US10759073B2 (en) * 2015-10-08 2020-09-01 Precision Foam Technologies Pty Ltd Cutting machine

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