US3027923A - Apparatus for bending and setting of laminated materials - Google Patents

Apparatus for bending and setting of laminated materials Download PDF

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Publication number
US3027923A
US3027923A US637014A US63701457A US3027923A US 3027923 A US3027923 A US 3027923A US 637014 A US637014 A US 637014A US 63701457 A US63701457 A US 63701457A US 3027923 A US3027923 A US 3027923A
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US
United States
Prior art keywords
former
jacks
band
bending
laminae
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
US637014A
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English (en)
Inventor
Schreiber Chaim Samuel
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.)
SCHREIBER SYSTEM (U S A) Ltd
SCHREIBER SYSTEM USA Ltd
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SCHREIBER SYSTEM USA Ltd
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Filing date
Publication date
Priority claimed from GB2951/56A external-priority patent/GB794142A/en
Application filed by SCHREIBER SYSTEM USA Ltd filed Critical SCHREIBER SYSTEM USA Ltd
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Publication of US3027923A publication Critical patent/US3027923A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/083—Presses specially designed for making the manufacture of shaped plywood articles

Definitions

  • the present invention relates to an improved apparatus for bending and setting laminated materials, such as wood veneers to form cabinets.
  • FIGURE 1 is an elevation of a machine for bending and setting wood veneers to form the carcase of a wireless cabinet
  • FIGURE 2 is a perspective view of a portion of the machine shown in FIGURE 1,
  • FIGURES 3 to 6 are elevations illustrating steps in the process of bending the laminae
  • FIGURE 7 is a perspective view of the article coming 011 the machine shown in the previous figures.
  • FIGURE 8 is an illustration of a variation of the invention.
  • FIGURES 1 and 2 A machine for carrying out the invention is shown in FIGURES 1 and 2. It comprises four steel supporting beams 10, 11, 12 and 13 between which are mounted seven hydraulic or compressed air jacks, 14, 15L, 15R, 16L, 16R and 17L, 17R. Also supported from the roof beam 12 is a fixed stout strut 18 on the lower end of which is rigidly and firmly secured an inner former 19 which is a solid rectangular prism with its longitudinal convex corner edges A, B, C and D rounded.
  • the jack 14 carries a table 20 which can be moved up and down with respect to the inner former 19.
  • the table constitutes an intermediate part of a multi-part outer former.
  • the jacks 15L and 15R carry similar blocks 21L and 21R which constitute side parts of the outer former and which can be moved by the jacks towards and away from the inner former 19.
  • the jacks 16L and 16R carry yokes 22L and 22R between the ends of which are rollers 23L and 23R respectively.
  • the jacks 17L and 17R carry clamps 24L and 24R holding the ends of a flexible steel band 25.
  • the cylinders of the jacks 17L and 17R are pivotally mounted at 26L and 26R respectively. Any one or more of the cylinders of the jacks 14, 15L, 15R, 16L and 16R may also be similarly pivoted if desired.
  • the body of a wireless cabinet is to be made of the shape shown at 27 in FIGURE 7. After it has been fashioned to the shape here shown, the carcase will be fitted with strengthening struts in its corners and elsewhere and a filler piece will be inserted to close the gap at 28. But as such finishing steps form no part of the invention they will not be described in detail.
  • the carcase may be formed of five rectangular sheets of plywood, in which case the three inner ones are coated on both sides with a binder and the two outer ones on their inner faces only.
  • the binder may be thermosetting resin.
  • the two or more sheets are then loosely assembled, so that their edges lie flush together, and are inserted between the flexible steel band 25 and the inner former 19 in the position shown in FIGURE 3.
  • all of the jacks 14, 15L, 15R, 16L and 16R are previously full retracted so that the outer former parts 20 and 21 and the rollers 23 are withdrawn from the inner former 19.
  • the jacks 17 are previously lowered so that the band 25 lies loosely around the inner former 19.
  • the jacks 17L and 17R are operated to pull the band 25 tight against the undersurface of the inner former 19, as shown in FIGURE 4.
  • the jack 14 is operated to force the intermediate former part 20 towards the underface of the former so that the laminae are squeezed between the inner former 19 and the block 20 which forms part of the multi-part outer former.
  • This step in the process is illustrated in FIGURE 5. In this way air bubbles are pushed from between the laminae under the former 19 and the band serves to pull the laminae tightly around the radiused corners C and D.
  • the next step, illustrated in FIGURE 6, is to operate the jacks 15L and 15R to force the side former parts 21L and 21R against the left or right-hand faces of the inner former 19 so as to squeeze the side portions of the laminae between the inner and outer formers.
  • FIGURES 1 and 2 The final step in the bending is illustrated in FIGURES 1 and 2 and consists in operating the jacks 16L and 16R so that the rollers 23L and 23R move inwardly and downwardly towards the former 19 so as to force the two end portions of the laminae down upon the top of the inner former 19.
  • the jacks 16 are more powerful than the jacks 17 so that the clamps ML and 24R move downwardly against the pull of the jack 17 and under the influence of the heavier jacks 16. At the same time the jacks 17 pivot inwardly.
  • thermosetting resin For a thermosetting resin, however, quicker setting is achieved by applying heat for a few minutes to the laminae.
  • the heat may be applied electrically in either of two ways.
  • a heating element in the form of a strip of resistive metal (shown in broken lines at 31 in FIGURE 3) is lapped around the inner former 19 until it occupies a position similar to that of the bent laminae but ending in two terminals 32 and 33 also shown in FIGURE 3.
  • a heating current of electricity is passed through the resistive element 31 and preferably also through the flexible metal band 25 so that the laminae are heated from both sides.
  • the inner metal element 31 and the flexible band 25 are used as terminals between which is passed a high frequency heating current.
  • the binder which may be a urea-formaldehyde plastic
  • the pressures in the jacks are removed, the band 25 is allowed to go slack and the formed carcase '27 is withdrawn.
  • an inner former 34 is carried by a jack part 35 whilst the intermediate part 36 of an outer former is aoargeas fixed.
  • the side members 37 and 38 of the outer former are movable in a manner similar to the parts 21L and 21R of the previous embodiment. It will be seen that the intermediate and side faces of the inner former 34 are convex and concave respectively, the outer parts 36, 37, 38 being correspondingly shaped.
  • the apparatus is operated in exactly the same manner as that shown in the previous figlres.
  • An apparatus for shaping laminated articles comprising an inner former having a plurality of faces in eluding an intermediate face, two side faces and a fourth face and at least four corners of relatively short radius bounding the adjacent edges of said faces, a multi-part outer former having an intermediate part and two side parts substantially complemental to the intermediate and two side faces of the inner former, means for moving the inner and outer formers relatively toward and away from each other, a flexible band disposed between the inner former and the outer formers and engageable with the outer surface of a laminated assembly of sheets positioned against the inner former, fluid actuated jacks engaging the opposite ends of said band and supporting said ends for movement toward and away from said formers and toward and away from each other into and out of a position opposing the fourth side of said inner former, means for actuating said jacks to move said ends of said band away from said formers for tightening it around the assembly of sheets and the intermediate and side faces of the inner former and the corners therebetween, band bending rollers engageable with the outside and extending transversely
  • An apparatus for shaping laminated articles comprising an inner former having a plurality of faces including an intermediate face, two side faces and a fourth face and at least four corners of relatively short radius between the adjacent edges of said faces, means supporting said former in a fixed position, a multi-part outer former having an intermediate part and two side parts substantially complemental to and opposing the intermediate and two side faces, respectively, of the inner former, a flexible band disposed between the inner former and the outer former and engageable with the outer surface of a laminated assembly of sheets positioned against the inner former, means for moving said intermediate part of said outer former toward said inner former to press said laminated assembly against said intermediate face, jacks engaging the opposite ends of said band and supporting said ends for movement toward and away from said formers and toward and away from each other into and out of a position opposing the fourth side of said inner former, means for actuating said jacks to move said ends of said band away from said formers for tightening it around the assembly of sheets and the intermediate and side faces of the inner former and the corners therebetween, means for moving said

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
US637014A 1956-01-30 1957-01-29 Apparatus for bending and setting of laminated materials Expired - Lifetime US3027923A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1190165X 1956-01-30
GB3027923X 1956-01-30
GB2951/56A GB794142A (en) 1956-01-30 1956-01-30 Improvements in and relating to the bending and setting of laminated materials

Publications (1)

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US3027923A true US3027923A (en) 1962-04-03

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US637014A Expired - Lifetime US3027923A (en) 1956-01-30 1957-01-29 Apparatus for bending and setting of laminated materials

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US (1) US3027923A (fr)
BE (1) BE555677A (fr)
NL (1) NL105587C (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063483A (en) * 1958-12-16 1962-11-13 Harwood Cabinets Ltd Forming machines for wood and like materials
DK106941C (da) * 1965-07-26 1967-04-03 Richard Schou Fremgangsmåde ved fremstilling af skabe eller lignende møbler.
US4495019A (en) * 1982-05-21 1985-01-22 Richard Ogg Plywood bending
US4793392A (en) * 1988-02-03 1988-12-27 Oakridge Railing And Stair Company Inc. Bending device
US4909889A (en) * 1988-02-01 1990-03-20 Lee & Strozier Millworking Machinery Corp., Inc. Wood laminating fixture
US4963212A (en) * 1987-08-31 1990-10-16 Ploughmann & Vingtoft Method for making a composite body
US5019193A (en) * 1988-08-29 1991-05-28 Speedy Die, Inc. Arrangement for and method of applying heat-transferrable decalcomania to mugs
US5562138A (en) * 1994-10-13 1996-10-08 The Longaberger Company Bowing press

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US455097A (en) * 1891-06-30 Machine for molding pulp
US965927A (en) * 1910-05-16 1910-08-02 Aaron S Nichols Machine for applying veneers.
US2009265A (en) * 1932-03-23 1935-07-23 Hirschfield Alexander Production of tennis and like racket frames
US2350915A (en) * 1942-04-13 1944-06-06 Wurlitzer Co Apparatus for forming panels
US2416427A (en) * 1944-06-24 1947-02-25 Raybestos Manhattan Inc Manufacture of tractive surface devices
US2442443A (en) * 1944-12-09 1948-06-01 Bakelite Corp Apparatus for pressing plastic sheeting
US2598363A (en) * 1950-08-24 1952-05-27 John L Davis Bonding apparatus
US2614158A (en) * 1950-01-07 1952-10-14 Mcgraw Electric Co Magnetic core
US2626642A (en) * 1948-08-13 1953-01-27 Romer G Weyant Plywood press
US2632381A (en) * 1949-10-08 1953-03-24 Celanese Corp Packaging device
US2642919A (en) * 1952-03-20 1953-06-23 Raybestos Manhattan Inc Bonding device and method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US455097A (en) * 1891-06-30 Machine for molding pulp
US965927A (en) * 1910-05-16 1910-08-02 Aaron S Nichols Machine for applying veneers.
US2009265A (en) * 1932-03-23 1935-07-23 Hirschfield Alexander Production of tennis and like racket frames
US2350915A (en) * 1942-04-13 1944-06-06 Wurlitzer Co Apparatus for forming panels
US2416427A (en) * 1944-06-24 1947-02-25 Raybestos Manhattan Inc Manufacture of tractive surface devices
US2442443A (en) * 1944-12-09 1948-06-01 Bakelite Corp Apparatus for pressing plastic sheeting
US2626642A (en) * 1948-08-13 1953-01-27 Romer G Weyant Plywood press
US2632381A (en) * 1949-10-08 1953-03-24 Celanese Corp Packaging device
US2614158A (en) * 1950-01-07 1952-10-14 Mcgraw Electric Co Magnetic core
US2598363A (en) * 1950-08-24 1952-05-27 John L Davis Bonding apparatus
US2642919A (en) * 1952-03-20 1953-06-23 Raybestos Manhattan Inc Bonding device and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063483A (en) * 1958-12-16 1962-11-13 Harwood Cabinets Ltd Forming machines for wood and like materials
DK106941C (da) * 1965-07-26 1967-04-03 Richard Schou Fremgangsmåde ved fremstilling af skabe eller lignende møbler.
US4495019A (en) * 1982-05-21 1985-01-22 Richard Ogg Plywood bending
US4963212A (en) * 1987-08-31 1990-10-16 Ploughmann & Vingtoft Method for making a composite body
US4909889A (en) * 1988-02-01 1990-03-20 Lee & Strozier Millworking Machinery Corp., Inc. Wood laminating fixture
US4793392A (en) * 1988-02-03 1988-12-27 Oakridge Railing And Stair Company Inc. Bending device
US5019193A (en) * 1988-08-29 1991-05-28 Speedy Die, Inc. Arrangement for and method of applying heat-transferrable decalcomania to mugs
US5562138A (en) * 1994-10-13 1996-10-08 The Longaberger Company Bowing press

Also Published As

Publication number Publication date
BE555677A (fr)
NL105587C (fr)

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