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Publication numberUS2677165 A
Publication typeGrant
Publication dateMay 4, 1954
Filing dateOct 27, 1950
Priority dateOct 27, 1950
Publication numberUS 2677165 A, US 2677165A, US-A-2677165, US2677165 A, US2677165A
InventorsJames E Copenhaver, Blanding D Clarkson, Jr Auburn Woods
Original AssigneeSonoco Products Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Concrete form and method of molding concrete columns therewith
US 2677165 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)



d TTOR/YEVJ Patented May 4, 19 54 l'lED srA'rs TT OFFICE CONCRETE FORM AND METHOD OF MOLD- ING CONCRETE COLUMNS THEREWITH South Carolina Application October 27, 1950, Serial No. 192,426


This invention relates to paper forms for use in molding concrete pillars or columns and the like.

The erection of concrete structures is generally accomplished by buildin wooden forms into which the concrete is poured and which are removed after the concrete has set. In certain instances prefabricated forms of metal have also been adapted for use, but in any case the form work for concrete construction is characterized by relatively high costs for the form material, particularly when metal forms ar used, and by high handling costs as well.

It has heretofore been proposed to use paper tubes as concrete forms in the construction of pillars and columns and the like, in order to avoid the high costs of conventional types of form work. This proposed use of paper tubes has not proved satisfactory, however, because of the great difficulty encountered in strippin them from the concrete after it has set. The difficulty with stripping appears to result principally from the fact that a paper surface presents a multitude of protruding or extending fibers that become imbedded or otherwise adhere to the concrete as it dries. Moreover, there is a severe abrasive action by the concrete on the inner surface of a paper tube form during pouring which further roughens the paper surface and increases its tendency to adhere.

Attempts to cure this difiiculty by conditioning the inside surface of the tubes with a coating or the like have not previously been successful because the protruding fibers on the paper surface are not completely smoothed down and covered over by most coatings; and, even more importantly, the few coating materials that do appear to cover over the protruding fibers satisfactorily do in eneral impart to the paper surface sufficient abrasion resistance to avoid roughening during pouring.

In accordance with the present invention we have now found that paper tubes may be uniquely conditioned for use as concrete forms by providing them with a liner film of polyethylene. Polyethylene is not only well suited as a coating material so that it can be applied to form a liner for the paper tubes readily and efficiently, but it also has a surprising tenacious quality which gives it good covering power as regards the protruding paper fibers, and exceptional abrasion resistance. A paper tube lined with polyethylene in accordance with the present invention can be stripped easily from concrete that has been pculed and set therein, and leaves an excellent surface finish on the concrete.

The present invention is described in further detail below in connection with the accompanying drawings, in which:

Fig. 1 is an elevation of a tubular concrete form of paper constructed in accordance with the present invention;

Fig. 2 is a fragmentary sectional detail taken generally at 2--2 in Fig. 1;

Fig. 3 is a further fragmentary sectional detail illustrating the manner of preparing the polyethylene liner for use in the form shown in Fig. 1;

Fig. 4 is an elevation, partly in section, showing a typical reinforced concrete structure in the course of construction with a concrete form of the present invention; and

Fig. 5 is a perspective view illustrating the use of cutting wires for use in stripping the form.

Referring now in detail to the drawings, and mor particularly at first to Figs. 1 and 2, the concrete form of the present invention is preferably formed by spirally winding a plurality of paper strips in the conventional superimposed relationship to form a laminated or multi-ply tubular body Ill of desired length and wall thickness. Th spirally wound paper strips are bonded together by means of a suitable adhesive interposed between them as they are wound, so that the resulting multi-ply tube wall, as indicated at l in Figs. 1 and 2, is of sufficient thickness to support adequately the load imposed in confining the concrete as it is poured therein.

The polyethylene liner film is preferably provided according to the present invention by applying it as indicated at It in Fig. 3 to the paper strip It that will be used to form the inner spiral windin of the tubular body H]. In this way, the spiral winding operation may be carried out in the usual manner in forming the tubular body Ill without any special procedure whatever being needed to incorporate the liner film l4. Alternatively, the polyethylene coated paper strip might be used in the same manner to form the outer spiral winding of the tubular body ID in instances where it was desired to provid an exterior moldin surface conditioned in accordance with the present invention so that the tubular body It could be used as a molding core.

The application of the liner film M to the paper strip 15 may be carried out conveniently by passing an extruded polyethylene sheet together with the paper strip directly through the nip of heated calendar rolls (not shown) which are driven at a speed sufiiciently in excess of the rate of extrusion to stretch the polyethylene sheet as it is extruded and thereby extend it to obtain the ing as at [8 to act as a form for a reinforced con crete pillar 20. The tubular body I is shown in this instance as being of relatively short length, but it might as well be shown in any other length desired for it may be provided in whatever length is needed in a particular instance.

Stripping of the tubular body to from the concrete after it has set may be accomplished either by unwrapping its spiral plies from the formed concrete, or by cutting it longitudinally and then unwrapping it. The latter method may be facilitated, if desired, by positioning cutting Wires as shown in Fig. at 22 in the tubular body. J0 before the concrete is poured. By pulling this wire 22 when the tubular body' i0 is to be removed it may be cut as indicated at 24 in Fig. 5 along its entire length to allow removal of the body it! in halves.

The present invention has been described above for purposes of illustration only, and is not-intended to be limited by this description except as defined in the appended claims.

We claim:

1. A form for molding concrete pillars and the like comprising a spirally wound tubular paper body having sufficient rigidity to support a col-- umn of concrete mix poured therein, said body being coated interiorly with a filmof polyethylene,- whereby adhesion of the mold walls to the cured concrete isprevented.

2. A form adapted for use in molding concrete articles comprising a multi-ply spirally wound paper tube of appropriate size and wall thickness to support a body of concrete poured therein and having a film of polyethylene over the inner surface thereof bonded to the-inner spiral winding of said tube, whereby the formis protected from the. abrasive action of the concretewhen poured-and sticking of said tube to said concrete is.prevented.

3. A concrete form adapted for molding pillars and the like comprising a spirally wound, selfsupporting, laminated paper body having. an interior polyethylene liner bonded to the inner spiral winding thereof and being coextensive therewith whereby the paper body is protected from the abrasive action of concrete when poured therein and adhesion of the paper body to the concrete is prevented.

4. A cylindrical form for molding concrete columns and the like, comprising a paper tube constructed from a plurality of plies of spirally wound paper of sufiicient strength and rigidity co-support a column of concrete mix poured therein, the innermost ply of said paper plies having a continuous, impervious coating thereon of extruded polyethylene resin of a thickness of the order of 0.002", said coating having sufficient elasticity and resistance to abrasion to prevent cracking or tearing of the coating when the concrete mix is poured in the form in contact with said'coating, and said coating preventing penetration therethrough of the concrete mix and enabling stripping of the form, with the coating intact, from the poured concrete column upon setting of theconcrete.

51A method for--molding concretecolumns and the like, comprising setting in the desired location a paper tube constructed from a plurality of. piles of spirally, wound paper of sufllcient strength and rigidity to support a column of concrete mix, the innermost ply of said paper plies having an impervious, thin coating thereon of extruded polyethylene resin, said coating having sufficient elasticity and resistance to abrasion to prevent cracking' or tearing of the coating upon contact with the concrete pouring said concrete mix into the tube in contact with said coatingand in sufficient amount substantially to fill the tube, said polyethylene resin coating preventing penetration therethrough of the water in the concrete mix, allowing. sufficient time for the concrete mix to set and harden within the surroundingtube, and then stripping the tube from the hardened concrete column, said polyethylene coating enabling easy stripping of the tube from the surface .of the concrete column.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,600,514 Seailles Sept. 21, 1926 ,701,619 Kendall Feb. 12, 1929 2,296,352. Keller Sept. 22, 1942 2,367,844 Cuno Jan. 23, 1945 2,462,331 Myers Feb. 22, 1949 2,491,147 Zahn Dec. 13, 1949

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1600514 *Jan 17, 1924Sep 21, 1926Alfred P BourquardezProcess for obtaining pieces of cement with polished or half-polished surfaces and the product thereof
US1701619 *Nov 30, 1927Feb 12, 1929Kendall George EMethod of and apparatus for manufacturing imitation marble
US2296352 *May 23, 1941Sep 22, 1942Keller Theodore FConcrete form
US2367844 *Feb 26, 1941Jan 23, 1945Lehon CompanyContinuous method of manufacturing asbestos-cement pipe
US2462331 *Apr 13, 1944Feb 22, 1949Bakelite CorpPolyethylene compositions
US2491147 *Nov 22, 1946Dec 13, 1949Austenal Lab IncMethod of making denture base parts and applying artificial teeth thereto
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2728127 *Oct 28, 1953Dec 27, 1955George T ArmstrongAnchoring device for concrete forms
US2809415 *Nov 28, 1955Oct 15, 1957Couelle JacquesMolding of building elements of elongated shape
US2836874 *Oct 12, 1955Jun 3, 1958Sonoco Products CoPaper tube concrete form
US2851330 *Apr 15, 1955Sep 9, 1958Owens Illinois Glass CoMethod of treating molds
US2861004 *Jul 31, 1956Nov 18, 1958Glenn SucettiConstruction and coating materials
US2866250 *Feb 11, 1954Dec 30, 1958Ford Meter Box Company IncSingle use fiber board mold for water meter barrels
US2873503 *Jun 13, 1956Feb 17, 1959Sonoco Products CoConcrete column form for square columns
US2884957 *Feb 13, 1956May 5, 1959Gen Motors CorpFlexible tubing
US2885522 *Jul 1, 1957May 5, 1959Sprague Electric CoElectrical component and casting arrangement
US2914833 *Nov 26, 1956Dec 1, 1959Sonoco Products CoPaper tube for forming concrete columns and the like having an overlapped inner ply with a coating material thereon
US2991533 *Apr 21, 1958Jul 11, 1961Sonoco Products CoForm for concrete columns
US3024512 *Aug 14, 1961Mar 13, 1962Dyer Robert KDisposable concrete form for posts and columns
US3026575 *Nov 27, 1957Mar 27, 1962Owens Illinois Glass CoSkylight structure and method of fabrication
US3087515 *Jul 11, 1960Apr 30, 1963Phillips Petroleum CoImpermeable barrier in cement lined pipe
US3100676 *Aug 26, 1957Aug 13, 1963American Latex Products CorpMethod for manufacturing a printing roll
US3129815 *Apr 20, 1961Apr 21, 1964Continental Can CoSpecial package
US3159899 *Nov 28, 1962Dec 8, 1964Dale Pafenberg JohnMolds for swing leg anchors
US3185255 *Jul 26, 1960May 25, 1965Merrill S BirdBallast element
US3216875 *Apr 17, 1958Nov 9, 1965John L SeymourMethod of making structural materials
US3220910 *Mar 26, 1962Nov 30, 1965Lockheed Aircraft CorpRemovable mandrel for forming resin reinforced wound articles
US3245648 *Jan 22, 1963Apr 12, 1966Johansson Rolf GustafMold assemblies and casting of building structures
US3267968 *Mar 19, 1963Aug 23, 1966Foll William ALaminated glassine paper coil form
US3402742 *Aug 27, 1964Sep 24, 1968Royston LabPipe coating methods and coated pipe
US3454257 *Aug 25, 1966Jul 8, 1969Robert C DupuisConcrete testing mold
US3511281 *Aug 12, 1968May 12, 1970Sonoco Products CoWound tube with string loop
US3661047 *Nov 18, 1968May 9, 1972Us NavyApparatus for casting thin walled hollow cylindrical inserts
US4022249 *Jun 30, 1975May 10, 1977Wafilin B.V.Fibrous tube for membrane filtration with a tearing member
US4069283 *Apr 5, 1976Jan 17, 1978Rauchfuss Arthur AMethod of curing and protecting a concrete column
US4112173 *Feb 15, 1977Sep 5, 1978Champion International CorporationConcrete module unit
US4135553 *Jun 16, 1975Jan 23, 1979Raychem CorporationRecoverable sleeve
US4439071 *Jan 15, 1982Mar 27, 1984Sonoco Products CompanyPiling encasement system
US4595168 *Feb 24, 1984Jun 17, 1986Perma Tubes Ltd.Plastic lined paper form for casting concrete columns
US4799348 *Jun 18, 1985Jan 24, 1989Max BramiMethod and equipment for making a rigid slab enabling to carry a building
US4824290 *Nov 17, 1986Apr 25, 1989Ahmad MasoudiMethod of constructing a rigid structure upon the bottom of a water as well as lost casing for performing said method
US4876054 *Feb 24, 1988Oct 24, 1989Perma Tubes Ltd.Concrete forming method
US4923334 *Dec 5, 1988May 8, 1990Ahmad MasoudiLost casing for constructing a rigid structure upon the bottom of a body of water
US4957270 *Jan 5, 1989Sep 18, 1990Sonoco Products CompanyConcrete column forming tube
US5281051 *Feb 8, 1991Jan 25, 1994Abt, Inc.Trench forming assembly and method
US5328142 *Jul 17, 1992Jul 12, 1994Sonoco Products CompanyConcrete column forming tube
US5348421 *Jan 24, 1994Sep 20, 1994Abt, Inc.Trench forming assembly and method
US5376316 *Mar 1, 1994Dec 27, 1994Sonoco Products CompanyMethod of making a concrete column with a concrete column forming tube
US5393171 *Jul 12, 1994Feb 28, 1995Abt, Inc.Trench forming assembly and method
US5399047 *Sep 13, 1993Mar 21, 1995Abt, Inc.Trench forming assemblies having enhanced anchoring means
US5478169 *Sep 13, 1993Dec 26, 1995Stegall; Lannie L.Method and apparatus for forming a trench
US5874016 *Oct 4, 1993Feb 23, 1999Sonoco Products CompanyConcrete column forming tube having a smooth inside coated surface
US6270052 *Jan 25, 1999Aug 7, 2001Smurfit Stone Container Corp.Form for producing concrete columns with recessed rings
US6467749Aug 31, 2000Oct 22, 2002Sonoco Development, Inc.Concrete column forming tube having a tear strip therein
US6872030 *Jan 25, 2002Mar 29, 2005North Pacific Group, Inc.Wood support piling with composite wrappings and method for reinforcing the same
US6878323 *Aug 2, 2001Apr 12, 2005Edward Robert FyfeMethod of manufacturing a stay-in-place form
US8247046 *Jul 30, 2004Aug 21, 2012Ezytube Pty LimitedMulti-layer tube of improved physical properties
US20010049919 *Aug 2, 2001Dec 13, 2001Fyfe Edward RobertStay-in-place form
US20050097827 *Nov 24, 2004May 12, 2005Quick Imprint Systems, Inc.Reversible and flexible liner for imprinting a decorative pattern on a malleable surface and a method of using same
US20060180733 *Jan 28, 2005Aug 17, 2006Van De Camp Johannes WTransparent construction form
US20080045393 *Jul 30, 2004Feb 21, 2008Ezytube Pty LimitedMulti-Layer Tube of Improved Physical Properties
US20080128583 *Jul 17, 2007Jun 5, 2008Doug SmoljoForm and method and apparatus for making a form
US20110057069 *Sep 9, 2009Mar 10, 2011Sonoco Development, Inc.Coated Paperboard Core For Elastomeric Fiber Production
US20110174956 *Jul 21, 2011Doug SmoljoForm and method and apparatus for making a form
US20140252199 *Mar 5, 2014Sep 11, 2014Everett David WeaverConcrete Pier Foundation Anchor Bolt Support and Chamfer Form
DE1106667B *Jul 24, 1958May 10, 1961Sonoco Products CoPapierform zum Giessen von Betonsaeulen
DE1113867B *May 16, 1958Sep 14, 1961Sonoco Products CoMehrschichtiges, schraubenfoermig gewickeltes Papierrohr
EP1108830A1Dec 15, 1999Jun 20, 2001Sonoco Development, Inc.Tubular formwork and method for placing and stripping it
WO2010001115A2 *Jun 30, 2009Jan 7, 2010Bhp Billiton Petroleum Pty LtdImprovements relating to hose
WO2010001115A3 *Jun 30, 2009Jun 3, 2010Bhp Billiton Petroleum Pty LtdImprovements relating to hose
U.S. Classification264/31, 405/257, 249/61, 229/5.81, 249/134, 229/4.5, 138/144, 427/230, 264/317, 249/48, 249/DIG.400, 428/34.2, 427/133, 425/DIG.120, 138/145, 264/338, 249/115
International ClassificationE04G13/02
Cooperative ClassificationY10S425/012, E04G13/021, Y10S249/04
European ClassificationE04G13/02B