CA1111278A - Rustrication strip - Google Patents
Rustrication stripInfo
- Publication number
- CA1111278A CA1111278A CA334,156A CA334156A CA1111278A CA 1111278 A CA1111278 A CA 1111278A CA 334156 A CA334156 A CA 334156A CA 1111278 A CA1111278 A CA 1111278A
- Authority
- CA
- Canada
- Prior art keywords
- concrete
- strip
- core
- nails
- impression
- 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
Links
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
RUSTRICATION STRIP
Abstract of the Disclosure Rigid, nailable strips completely embedded in a soft, flexible elastomer, arranged to be nailed to concrete forms for rusticating (grooving or decorating finished concrete surfaces.
Abstract of the Disclosure Rigid, nailable strips completely embedded in a soft, flexible elastomer, arranged to be nailed to concrete forms for rusticating (grooving or decorating finished concrete surfaces.
Description
SPECIFICATION
The use of rustrication strlps for concrete forms is well known, and includes such strips as wooden strips nailed to the form, rigid plastic strips nailed or cemented to the con-crete orm, etc. A number of problems occur with the commonly used strips. For example, with the wooden strips they are nor-mally only used on time due to damage by the moisture of the concrete, there is a tendency for nail holes showing in the finished concrete, wooden strips are limited in configuration of the designs in the strip, etc. Similar disadvantages are found with the rigid plastics, which are rigid and generally hollow. Nailing such plastic strips must be done with care, and even then the nails leave a mark in the finished concrete or the plastic strip may be damaged by an attempt to place the nails in a position where they will not show holes in the concrete. The known strips are easily damaged on attemped removal, reducing multiple use.
THE PRESENT INVENTION
The present invention provides a rustrication strip in-cluding a nailable, rigid member embedded in a soft, flexible elastomer which may be nailed to wooden concrete forms for pro-ducing grooves in finished concrete. The elastomer is thic~
enough so that the heads of finish nails driven through the strip, nailing it to a wooden panel of a form, are covered by 3 the soft elastomer, leaving no nail imprints in the finished con-crete. The strips may be removed from the form without damage ; ;
. . .
: :
`
' . . ~ .
', `
~ . . .
1 even with the nails pulled through the strip. The strips may be made in any shape, as by molding to impress in the surface oE the surface of the strip a design, which is not possible by extrusion of a plas-tic, or in wooden s-trips. Addi-tionally, the elastomeric material provides gasketing at joints, and gives good sharp lines in -the design. The rigid rnaterial may be wood, aluminum, rigid plastic, etc. which is adopted to be nailed. The elastomer is preferably a polyurethane, but other polymeric materials may be used if the polymer is soft, flexible and reasonably rugged to withstand tough handling.
OBJECTS AND ADVANTAGES OF TIIE INVENTION
Included among the objects and advantages of the inven-tion is to provide an essentially rigid core embedded in a soft, resilient elastomer as a rustication strip for concrete forms.
Another object of the invention is to provide a rustri-cation strip which includes an essentially rigid core embedded in a soft, flexible elastomer which perm:its nail heads to be sunk into the elastomer and not leave a mark on the finished concrete, and which may be nailed in position on a concrete ~O form with few nails.
Yet another object of the ihvention is to provide a rustrication strip capable of accepting many different shapes and designs, for impartiny them to finished concrete, and pro-viding good sharp lines on release from the finished concrete.
An additional object of the invention is to provide a multiple use rustrication strip, which strips easily from set concrete without breakage, and which may be repeatedly reused.
These and other objects and advantages of the invention may be ascertained by reference to the following description and appended illustrations.
GENERAL DESCRIPTION OF TIIE DR~WINGS
Fig. 1 is a perspective view of one Eorm of a rustrication ;r3 1 strip ~ccor~ing to the lnvention.
Fig. 2 is a side, cross-section, elevation of a rusti-cation strip attached to a form panel.
Fig. 3 is a schematic side elevational view of one use of a rustication strip.
Fig. 4 is a cross~sectional elevation of a slightly modified form of a rustication strip according to the invention.
Figs. 5 and 6 are end elevations of modified rustrication strips, according to the invention, showing some of many forms and shapes of the strips available.
Fig. 7 is a generally schematic front view of a concrete form panel, with a layout of rustrication strips secured to the panel.
Fig. 8 is a side, eross-seetional elevation of a strip fastened to a panel of a form.
SPECIFIC DESCRIPTION OF THE DRAWINGS
In the general, a rustieation strip, aeeording to the invelltion, lncludes an essentially ric~id eore eovered wi~h a soft, resilient elastomer, formed in long st:rips and sawable to desired lengths. The elastomer may be formed in any eross--seetion con-figuration, with various design features in the strip, if desired.
The rigid eore permits the strip to be held with a minimum of astening elements, maintaining the strip straight and in place, as well as making it available for easy removal and reuse. In one form of high utility, a wooden eore is eovered, peripherally, around wood and from end to end, with a soft, flexible polyure-thane formed into the desired configuration. The eore must have sufficient urethane eovering it to permit heads of the nails to embed in the plastie holding the strip tightly to a concrete form, but permitting the plastic to close the nail hole and hide the nail heads and entrance points.
In the form shown in Fig. 1, a wooden core 10 is embedded Jt~ w~
l in a truncatecl t~iangular shaped polyurethane elas-to~er 12, or trape~oiclal. The elas-tomer completely encloses the wooden strip laterally, eYcept for the ends where the strip is cut to size.
The strip may be cut to length with a saw, nailed, cemented or otherwise attached -to concrete form (usually wooden). The cross sectional shape of plastic is a truncated triangle (trapezoid) having a base or hypotenus 14, sloping sides 16 and 18 and a top 20. The actual size and shape is determined by the designer of the building according -to the use desired.
As shown in Fig. 2, the rustrication strip is secured to a panel 22 of a concrete form by means of a finish nail 24. The nail, has been hammered through the plastic surface 20, leaving an entry hole 25, into the wooden strip lO and into the concrete form. The nail is hammered into a panel 22 of the concrete form so that it is buried in the plastic, which being soft and elas-tic generally closes the hole 25. The nails hold the strip in tight face engagement with form panel. Since the wooden core is stifE, a few nails along the strip hoLds it in place. The plas-tic is flexible enough to close the holes in the plastic which has been penetrated by the nails. When the nails are removed, when the strip is recovered from the reuse, the plastic is re-silient enough to close the penetration holes, and on reuse, any previous holes have been closed and do not imprint on any subse-quent concrete work. -The cross-sectional configuration of a rustrication strip may take other forms depending on the desires of the designer. As shown in Fig. 4, the cross-sectional shape of the strip is gener-ally the same as that of Fig. 1, but a wooden core 30 is located near the base 31 rather than near the top surface 3~, leaving a substantial thickness of plastic above the core. A strip, Fig.
5, includes a square core 36 and a plastic covering having a base 37, two sides 38 and 39 sloping to a textured face 40. The face 1 ~o may be textured into any desired shape while maintaining the plastic over the core. A rounded top ~2, Fig. 6, on a base 43 with sloped side 44 and ~5 enclose a core 47. This produces a rounded groove in the finished concrete.
A number of uses are available for the strips, and one use is shown in Fig. 3, and another use in Figs. 7 and 8. In Fig. 3 a rustication strip 50 is nailed or otherwise secured to an edge of a panel 51 of a concrete form. In this use, the wall is poured on a set floor of concrete. Thus, a concrete wall 53 ~ if formed between concrete form panels 51 and 52, joining a floor or deck 55. The strip 50 leaves a groove in the wall 53 at the intersection between the wall and floor.
The strips may be secured in predetermined patterns on a concrete form panel, Fig. 7 to provide a design in the finished concrete. Strips 60, 60a, 60b, 60c, 60d are nailed to a panel 70 in a configuration so as to leave impressions of the strips as grooves in the finished concrete. The design here is for a stone wall conEiguration with the grooves depicting the mortor joints between stones. The wall may be painted, the grooves may be painted to simulate a stone wall, etc. In Fig. ~, the stri~ 60 is secured to panel 70, with plastic 62 extending above a core 63, and a base of plastic 64.
In general, the soft, resilient plastic provides gasket-ing to prevent running of concrete water from the freshly poured concrete, provides easy strippincJ of the forms from the hardened concrete, and gives good sharp impression lines in the concrete.
;~ The strips resist breakage, and may be reused many times as the ; wooden core does not come into contact with concrete water - (which will cause swelling, warping, twisting, etc. of wood).
~- 3O The strips are self-reinforced, and external reinforcing is not necessary especially where the polymer bonds with the core ma-terial. Highly impor-tant is the fact that the nail heads of the ; 4 ~
1 attacl~ g nails may be hidden and do not make an impression in the finished concrete as impressions.
The polyurethane is very satisfactory Eor the plastic covering as it may be made soft and still have substantial ab-rasion resistance. The polyurethane, also, bonds to the core to produce a unitized strip. other types of plastics may be used which have similar characteristics. Other types of rigid core may be used for the wood, for example, rigid vinyl strips, poly-ethylene and other plastics, aluminum and other soft metal strips capable of being nailed~
; -6-
The use of rustrication strlps for concrete forms is well known, and includes such strips as wooden strips nailed to the form, rigid plastic strips nailed or cemented to the con-crete orm, etc. A number of problems occur with the commonly used strips. For example, with the wooden strips they are nor-mally only used on time due to damage by the moisture of the concrete, there is a tendency for nail holes showing in the finished concrete, wooden strips are limited in configuration of the designs in the strip, etc. Similar disadvantages are found with the rigid plastics, which are rigid and generally hollow. Nailing such plastic strips must be done with care, and even then the nails leave a mark in the finished concrete or the plastic strip may be damaged by an attempt to place the nails in a position where they will not show holes in the concrete. The known strips are easily damaged on attemped removal, reducing multiple use.
THE PRESENT INVENTION
The present invention provides a rustrication strip in-cluding a nailable, rigid member embedded in a soft, flexible elastomer which may be nailed to wooden concrete forms for pro-ducing grooves in finished concrete. The elastomer is thic~
enough so that the heads of finish nails driven through the strip, nailing it to a wooden panel of a form, are covered by 3 the soft elastomer, leaving no nail imprints in the finished con-crete. The strips may be removed from the form without damage ; ;
. . .
: :
`
' . . ~ .
', `
~ . . .
1 even with the nails pulled through the strip. The strips may be made in any shape, as by molding to impress in the surface oE the surface of the strip a design, which is not possible by extrusion of a plas-tic, or in wooden s-trips. Addi-tionally, the elastomeric material provides gasketing at joints, and gives good sharp lines in -the design. The rigid rnaterial may be wood, aluminum, rigid plastic, etc. which is adopted to be nailed. The elastomer is preferably a polyurethane, but other polymeric materials may be used if the polymer is soft, flexible and reasonably rugged to withstand tough handling.
OBJECTS AND ADVANTAGES OF TIIE INVENTION
Included among the objects and advantages of the inven-tion is to provide an essentially rigid core embedded in a soft, resilient elastomer as a rustication strip for concrete forms.
Another object of the invention is to provide a rustri-cation strip which includes an essentially rigid core embedded in a soft, flexible elastomer which perm:its nail heads to be sunk into the elastomer and not leave a mark on the finished concrete, and which may be nailed in position on a concrete ~O form with few nails.
Yet another object of the ihvention is to provide a rustrication strip capable of accepting many different shapes and designs, for impartiny them to finished concrete, and pro-viding good sharp lines on release from the finished concrete.
An additional object of the invention is to provide a multiple use rustrication strip, which strips easily from set concrete without breakage, and which may be repeatedly reused.
These and other objects and advantages of the invention may be ascertained by reference to the following description and appended illustrations.
GENERAL DESCRIPTION OF TIIE DR~WINGS
Fig. 1 is a perspective view of one Eorm of a rustrication ;r3 1 strip ~ccor~ing to the lnvention.
Fig. 2 is a side, cross-section, elevation of a rusti-cation strip attached to a form panel.
Fig. 3 is a schematic side elevational view of one use of a rustication strip.
Fig. 4 is a cross~sectional elevation of a slightly modified form of a rustication strip according to the invention.
Figs. 5 and 6 are end elevations of modified rustrication strips, according to the invention, showing some of many forms and shapes of the strips available.
Fig. 7 is a generally schematic front view of a concrete form panel, with a layout of rustrication strips secured to the panel.
Fig. 8 is a side, eross-seetional elevation of a strip fastened to a panel of a form.
SPECIFIC DESCRIPTION OF THE DRAWINGS
In the general, a rustieation strip, aeeording to the invelltion, lncludes an essentially ric~id eore eovered wi~h a soft, resilient elastomer, formed in long st:rips and sawable to desired lengths. The elastomer may be formed in any eross--seetion con-figuration, with various design features in the strip, if desired.
The rigid eore permits the strip to be held with a minimum of astening elements, maintaining the strip straight and in place, as well as making it available for easy removal and reuse. In one form of high utility, a wooden eore is eovered, peripherally, around wood and from end to end, with a soft, flexible polyure-thane formed into the desired configuration. The eore must have sufficient urethane eovering it to permit heads of the nails to embed in the plastie holding the strip tightly to a concrete form, but permitting the plastic to close the nail hole and hide the nail heads and entrance points.
In the form shown in Fig. 1, a wooden core 10 is embedded Jt~ w~
l in a truncatecl t~iangular shaped polyurethane elas-to~er 12, or trape~oiclal. The elas-tomer completely encloses the wooden strip laterally, eYcept for the ends where the strip is cut to size.
The strip may be cut to length with a saw, nailed, cemented or otherwise attached -to concrete form (usually wooden). The cross sectional shape of plastic is a truncated triangle (trapezoid) having a base or hypotenus 14, sloping sides 16 and 18 and a top 20. The actual size and shape is determined by the designer of the building according -to the use desired.
As shown in Fig. 2, the rustrication strip is secured to a panel 22 of a concrete form by means of a finish nail 24. The nail, has been hammered through the plastic surface 20, leaving an entry hole 25, into the wooden strip lO and into the concrete form. The nail is hammered into a panel 22 of the concrete form so that it is buried in the plastic, which being soft and elas-tic generally closes the hole 25. The nails hold the strip in tight face engagement with form panel. Since the wooden core is stifE, a few nails along the strip hoLds it in place. The plas-tic is flexible enough to close the holes in the plastic which has been penetrated by the nails. When the nails are removed, when the strip is recovered from the reuse, the plastic is re-silient enough to close the penetration holes, and on reuse, any previous holes have been closed and do not imprint on any subse-quent concrete work. -The cross-sectional configuration of a rustrication strip may take other forms depending on the desires of the designer. As shown in Fig. 4, the cross-sectional shape of the strip is gener-ally the same as that of Fig. 1, but a wooden core 30 is located near the base 31 rather than near the top surface 3~, leaving a substantial thickness of plastic above the core. A strip, Fig.
5, includes a square core 36 and a plastic covering having a base 37, two sides 38 and 39 sloping to a textured face 40. The face 1 ~o may be textured into any desired shape while maintaining the plastic over the core. A rounded top ~2, Fig. 6, on a base 43 with sloped side 44 and ~5 enclose a core 47. This produces a rounded groove in the finished concrete.
A number of uses are available for the strips, and one use is shown in Fig. 3, and another use in Figs. 7 and 8. In Fig. 3 a rustication strip 50 is nailed or otherwise secured to an edge of a panel 51 of a concrete form. In this use, the wall is poured on a set floor of concrete. Thus, a concrete wall 53 ~ if formed between concrete form panels 51 and 52, joining a floor or deck 55. The strip 50 leaves a groove in the wall 53 at the intersection between the wall and floor.
The strips may be secured in predetermined patterns on a concrete form panel, Fig. 7 to provide a design in the finished concrete. Strips 60, 60a, 60b, 60c, 60d are nailed to a panel 70 in a configuration so as to leave impressions of the strips as grooves in the finished concrete. The design here is for a stone wall conEiguration with the grooves depicting the mortor joints between stones. The wall may be painted, the grooves may be painted to simulate a stone wall, etc. In Fig. ~, the stri~ 60 is secured to panel 70, with plastic 62 extending above a core 63, and a base of plastic 64.
In general, the soft, resilient plastic provides gasket-ing to prevent running of concrete water from the freshly poured concrete, provides easy strippincJ of the forms from the hardened concrete, and gives good sharp impression lines in the concrete.
;~ The strips resist breakage, and may be reused many times as the ; wooden core does not come into contact with concrete water - (which will cause swelling, warping, twisting, etc. of wood).
~- 3O The strips are self-reinforced, and external reinforcing is not necessary especially where the polymer bonds with the core ma-terial. Highly impor-tant is the fact that the nail heads of the ; 4 ~
1 attacl~ g nails may be hidden and do not make an impression in the finished concrete as impressions.
The polyurethane is very satisfactory Eor the plastic covering as it may be made soft and still have substantial ab-rasion resistance. The polyurethane, also, bonds to the core to produce a unitized strip. other types of plastics may be used which have similar characteristics. Other types of rigid core may be used for the wood, for example, rigid vinyl strips, poly-ethylene and other plastics, aluminum and other soft metal strips capable of being nailed~
; -6-
Claims (3)
1. A reusable rustication strip for securing by nailing to wooden concrete forms to produce a groove impression in finished concrete comprising:
(a) an elongated, continuous strip of an essentially rigid core, said core having a substantial thickness for holding nails and giving it the characteristics of being easily nailable for attachment with nails to planar forms, (b) a soft, resilient polymeric cover over said core, laterally completely enclosing said core therein and closely adhering thereto forming a non-hollow strip, having an upper external cross-sectional configuration of the desired groove impression in concrete and providing a planar-polymeric lower opposed surface for face engagement with a concrete form, and the upper opposed surface for making an impression in concrete, and providing sufficient thickness of polymer on said core on said upper opposed surface to seal nail holes put through it, and said polymeric cover being soft for forming a gasket for concrete and for easy stripping from set concrete providing a sharp impression therein, (c) and said strip being cutable to desired lengths for attachment by nails to planar forms and easily removable therefrom for reuse.
(a) an elongated, continuous strip of an essentially rigid core, said core having a substantial thickness for holding nails and giving it the characteristics of being easily nailable for attachment with nails to planar forms, (b) a soft, resilient polymeric cover over said core, laterally completely enclosing said core therein and closely adhering thereto forming a non-hollow strip, having an upper external cross-sectional configuration of the desired groove impression in concrete and providing a planar-polymeric lower opposed surface for face engagement with a concrete form, and the upper opposed surface for making an impression in concrete, and providing sufficient thickness of polymer on said core on said upper opposed surface to seal nail holes put through it, and said polymeric cover being soft for forming a gasket for concrete and for easy stripping from set concrete providing a sharp impression therein, (c) and said strip being cutable to desired lengths for attachment by nails to planar forms and easily removable therefrom for reuse.
2. A reusable rustication strip according to claim 1, wherein said opposed upper surface is textured.
3. A reusable rustication strip according to claim 1, wherein said core is relatively thin, nailable aluminum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US95340478A | 1978-10-23 | 1978-10-23 | |
| US953,404 | 1978-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1111278A true CA1111278A (en) | 1981-10-27 |
Family
ID=25493946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA334,156A Expired CA1111278A (en) | 1978-10-23 | 1979-08-21 | Rustrication strip |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1111278A (en) |
-
1979
- 1979-08-21 CA CA334,156A patent/CA1111278A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |