CA1083112A - Snowplowing resisting road surface marking tape material - Google Patents
Snowplowing resisting road surface marking tape materialInfo
- Publication number
- CA1083112A CA1083112A CA276,149A CA276149A CA1083112A CA 1083112 A CA1083112 A CA 1083112A CA 276149 A CA276149 A CA 276149A CA 1083112 A CA1083112 A CA 1083112A
- Authority
- CA
- Canada
- Prior art keywords
- tape
- rail
- elements
- tape material
- portions
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/576—Traffic lines
- E01F9/578—Traffic lines consisting of preformed elements, e.g. tapes, block-type elements specially designed or arranged to make up a traffic line
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Signs Or Road Markings (AREA)
- Road Repair (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Prefabricated tape material designed to be laid on and firmly secured to the surface of roadways and other areas open to vehicle traffic pavement for forming lines and other traffing regulating signs and markings thereon. The tape material has a traffic wear resisting upper layer having an essentially planar surface and a plurality of traffic facilitating elements in particular retroreflective elements partially embedded into and secured to said upper layer and partly essentially sharply protruding above the planar surface for a given height for light impingement and retroreflection. The tape material comprises complemental protective components upwardly protruding over the planar face up at a height greater than the given height and forming a snowplowing implements raising and supporting surface on which the implements can slidingly pass without interference with the protruding elements.
Prefabricated tape material designed to be laid on and firmly secured to the surface of roadways and other areas open to vehicle traffic pavement for forming lines and other traffing regulating signs and markings thereon. The tape material has a traffic wear resisting upper layer having an essentially planar surface and a plurality of traffic facilitating elements in particular retroreflective elements partially embedded into and secured to said upper layer and partly essentially sharply protruding above the planar surface for a given height for light impingement and retroreflection. The tape material comprises complemental protective components upwardly protruding over the planar face up at a height greater than the given height and forming a snowplowing implements raising and supporting surface on which the implements can slidingly pass without interference with the protruding elements.
Description
The present invention is conce~ned with road surface marking for traffic regulation, that is with forming! on the upper face of roadways, highways and other areas open to vehicle traffic, traffic regulating signs, such as roadways center-lines, traffic lane dividing lines, roadway edge lines, pedestrian crossing marking strips and so on.
More particularly, this invention is concerned with forming said surface markings or signs by selectively position-ing on and fixedly securing to the upper face of roadways (and corresponding roadable areas) prefabricated tape materials which in service, will form p~Etions of the roadable area, said tape materials being of the kind provided with retroreflective elements partially embedded into or otherwise secured to the upper traffic wear resisting layer thereof, for improving nighttime visibility of the marking.
The art of producing and applying such tape material is a well worked on and wide patent literature thereabout exists.
Recently developed and improved tape materials provided with highly efficient retroreflective elements have been described,for example in the U.S. Patent No.3,781,083 (British Patent No.1;367,240~and German Patent Application P 2234 384.6),U.S.Patent No.3,935,365 (British Patent No.1,463,681 and German Patent Application P 24 03 398.5),U.S.Patent No.3,981 557 (British Patent No.1.443.618 and German Patent Application P 24 41 491.3) and other, all of the Inventor of the present invention.
Very broadly speaking, the retroreflectivity, that is the nighttime visibility at distance, upon retroreflection of the light emitted by the vehicles headlamps, is grossly proportional to the sharp upwardly jutting out the elements above the upper surface of the signalling tape material.
It is evident that the compounding and the manufacture of said roadway sur~ace marking tape materials ta]ce into conside-ration the wear and the severe abuse of vehicle traffic and the~
i:! , :, ' ~83~
stresses which are unavoidably applied by the vehicle passage thereover, in particular during positive and negative accelera-tions and even during emergency braking. An extremely destructive action is however exerted by the passage of snowplowing machines and vehicles, in particular of the type provided with snow flangers or blades designed and positioned for exerting a some-what doctoring action for scraping off and displacing away the snow layer from the road pavement surface. Those skilled in the art are well aware that no sharply protruding retroreflective element of the type referred to above can resist the scraping action of such snow removing means or, conversely, the entire tape material can be stripped or torn off from the road surface by a snow scraper implement impinging on such pro-truding elements, if exceptionally firmly secured to the tape material.
It is therefore an object of this invention to pro-vide a new and improved roadway surface making tape material which is substantially not prejudiced or affected by the pas-sage and action of currently used snowplowing machines, and -therefore capable of maintaining efficiency and nighttime visibility during wintertime or in any case when the weather requires even repeated snowplowing of the road surface.
Accordingly, the invention as herein claimed is a prefabricated pavement markiny tape, essentially comprising a unitary structure which includes an elongated tape portion securable to a pavement and having a substantially planar traffic-wear resistant upper surfacet a plurality of retro-reflective elements each having a lower section embedded in the tape portion and an upper section pro~ecting above the upper surface of the tape portlon to a predetermined height;
and at least one uninterrupted rail portion extending length-wise of the direction of elongation of the tape portion and B
:, , . . . : . .
83~L1Z
Eree of the retroreflective elements. The rail portion is on the upper surface of the tape portion and projects upwardly therefrom to a height which exceeds the aforementioned pre-determined height to which the upper sections of the retro-reflective elements pro~ect, so as to protect the tape portion and the upper sections of the retroreflective elements against impingement of and damage by a snowplow.
Accordlng to a preferred embodiment of the invention, this rail portion has a trapezoIdal cross-section and has ~ -io upwardly and inwardly inclined sides. It preferably also extends along the entire length of the tape portion.
Preferably also, there is provided an additional rail portion, both rail portions extending longitudinally along ~
the tape portion and being transversely spaced from each other ~ ~ -by a distance at most equal to the distance between two ends of ;~
a snowplow blade. Also, this additional portion is preferably secured to the upper surface of the tape portion in such a manner that it projects above the predetermined height, the multiplicity of retroreflective elements being between the rail portions. -These and other features of the invention and the service and advantages thereof will be made apparent from the following detailed description of preferred embodiments thereof, referring to the accompanying drawings, wherein:
Fig. 1 is a diagrammatical perspective view of a con-ventional snowplowing machine operating on and along a roadway having traffic regulating strip markings consisting of tape material secured to the pavement thereof;
Fig. 2 is a cross-sectional fragmentary enlarged view ~of the road surface grazing lower edge portion of any of the ploughshare snow removing means of the machine;
, r~
.
:.
FIG. 3 iS a perspective fragmentary view of an end ~:
portion of a marking tape constructed according to the invention;
FIGS. 4 and 5 are fragmentary cross-sectional views of :
examples of the structure and arrangement of the components of the tape of FIG. 3;
FIG. 6 is a fragmentary sectional view of a modified arrangement, taken along the plan indicated a VI-VI in E'IG. 7 wherein retroreflective elements are grouped ~- .
to form protruding structures arranged for slidably supporting a snow displacing means thereabove; :: :
FIG. 8 is a perspective fragmentary and partly sectional view of another embodiment of the tape material :
including differently arranged and protected groups of :
retroreflective elements;
` FIGS. 9 and 10 are enlarged, detailed and fragmentary sectional views of one group of the tape of FIG. 8, taken in a vertical plane parallel to and respectively perpendicular to the side edges of the tape, and FIG.ll is an exploded view of the structure of FIG.10, prior to its assembling.
The scope and the advantages of the invention will be made more evident upon a consideration of FIG. 1: a conventional snowploughing apparatus comprises a motor driven vehicle such as ~ , that generally indicated at N, provided with snow parting and laterally displacing ploughshare means or snow flangers V', secured at the fore body of the vehicle, and seldom with complemental side flangers V". Such plowing means are provided ~:
with a ground engaging lower edge portion L (details in FIG.2) of proper cross-sectional configuration and of given thickness Da adapted for sliding on the surface S of the roadway pavement, for .
engaging the base of the snow layer laying and seldom pressed and -/or frozen thereon. The operations of such implements do not :~
generally affect an uniformly produced and smooth surface S.
.:, . ., . - . ,. .
-, ... , ,: .,, . .. .. ~ :: . :
The operation is however extremely destructive for road surface markings, such as traffic lane dividing stripsM or edge de~ining strips M' (either continuous or discontinuous), in particular when such strips are formed by tape materials having an upper surface S having elements E, principally retro-reflective elements partly embedded within the mono- or multi-layer structure Sp (FIGS. 3 to 5 and 8 to 10) but substantially and sharply protruding of jutting above the generally planar upper face Su of the tape.
According to the embodiment of FIG. 3, the tape material M is provided with at least one and preferably two (or more) protruding component R (which can be compared to -"rails") firmly secured to the tape structure Sp and of height -H (FIGS. 3 and 4) above the actual upper face Su of the tape, greater than the height or jutting of the generally highest elements E. The upper narrow and elongated face of said elements form a surface on which the blade or blades L of the snowplowing means, which are therefore caused to run on a plane (the trace of which is indicated at P-P) spaced above the said upper face Su at said height H, thus passing above the elements E.
Preferably, said components or rails R are arranged lengthwise of the tape material ~ and spaced each to other less than the actual width Ll of the tape,that is noticeably inwardly of the very side edges of the tape.
At their end portions, the rails R are tapered to form sloping surfaces P' (FIG.3) along which the snowplowing means can effortlessly slide and be progressively raised at the height H of the slide plane P-P above the elements E.
These rails or compo~ents ~ can be made of metal rods 10, such as of inox, or with extruded plastics resisting to wear, friction and stresses, such as polyester, polyurethane , nylons ~ -. ..
and the like. The roads are firmly secured to the tape structure say by means of adhesive, solvents and the like. iSaid rails can also . . . . , . : , ,, , : ., ,, . ,, , , . , , 33~
be made integral with the upper layer of the tape, such as by plastics extrusion process. Alternatively, the rails can comprise a pressure resistent core (FIG. 4) coated by a resing impregnat-ed wear resisting fabric, which complements their connection to the tape structure. Same rails might have a tapered cross-sectional configuration (FIG. 5) and partially embedded into the tape upper layer to form a dove-tail connection.
In view of a most complete protection of the elements against the tearing-off action of the snowplowing means (and of broken ice pieces carried along therewith), an arrangement such as shown in FIGS. 6 and 7 can provide a valuable contribution.
Such arrangement comprises grouping each plurality of elements E
about a stress and wear resistant resinous body 16 having a flat upper surface 14, said groups being arranged on the surface Su of the tape at spacings I (in the direction A in which the snow-plowing implement is assumed to travel on the road) less than the said width Da Of the lower road engaging edge portion of the implements.
The embodiment shown in EIGS. 8 to 11 consists of road surface marking tape material M" provided with grouped highly efficient upwardly protruding retroreflective elements. This emr bodiment is particularly but not exclusively advantageous for ensuring the visibility at distance of highways edge lines and other traffic dividing lines which are generally assumed to be not crossed by the uehicles. Retroreflective elements E' each having a sharply protruding dome or part-spherically shaped pro-truding portion and a generally flattened lower portion having reflectorized retorcollimating beads secured thereto (these features do not form part of the present invention), are grouped in rows extended transversally of the tape at proper intervals I' therealong.
Each group is formed and arranged to form an unitary ;~
retroreflective device including said elements and means for pro- ~ -~6- ~
33~
tecting same against the destructive action of snowplowing imple-ments, each device being generally indicated at C and its protective component at R' (as being alternative to the rails R
of FIG. 3). Said component R' is transversally arranged on the tape surface Su and bridges above the row of elements E'. It comprises a cross bar or beam 28 having recesses 36 into which neck portions 24 can be engaged and secured for improving the rigidity and the resistance of the device. The said beam 28 is integrally :Eormed with side or leg portions 30 having foot portions adapted to be partially embedded into and secured to the upper layer Su of the tape, suitably locally thickened as indicated at 26 (FIG.9) and at 26' (FIG. 10) for best connection with the said protective component R' and respectively with the lower portions of the elements ~
During the operation of the snowplowing, the snow parting and displacing implements thereof pass successively above the various devices C by upwardly sliding along sloping surfaces formed by the same side portions 30 of the protective component R'. One slope is illustrated in FIG. 9. The said sloping surfaces can be formed and arranged in one direction only (as shown) on the premise that a snowplowing machine will travel in one given direction only, when in service, but the said side portions 30 can be however provided with symmetrical slopes for facilitating the passage of the snowplowing machine in both directions, such as in two-way rather narrow mountain or country roadways.
~'`"'''~ , '.' ' . ' . ' ' . ~ , ., , . '. ':: ~
More particularly, this invention is concerned with forming said surface markings or signs by selectively position-ing on and fixedly securing to the upper face of roadways (and corresponding roadable areas) prefabricated tape materials which in service, will form p~Etions of the roadable area, said tape materials being of the kind provided with retroreflective elements partially embedded into or otherwise secured to the upper traffic wear resisting layer thereof, for improving nighttime visibility of the marking.
The art of producing and applying such tape material is a well worked on and wide patent literature thereabout exists.
Recently developed and improved tape materials provided with highly efficient retroreflective elements have been described,for example in the U.S. Patent No.3,781,083 (British Patent No.1;367,240~and German Patent Application P 2234 384.6),U.S.Patent No.3,935,365 (British Patent No.1,463,681 and German Patent Application P 24 03 398.5),U.S.Patent No.3,981 557 (British Patent No.1.443.618 and German Patent Application P 24 41 491.3) and other, all of the Inventor of the present invention.
Very broadly speaking, the retroreflectivity, that is the nighttime visibility at distance, upon retroreflection of the light emitted by the vehicles headlamps, is grossly proportional to the sharp upwardly jutting out the elements above the upper surface of the signalling tape material.
It is evident that the compounding and the manufacture of said roadway sur~ace marking tape materials ta]ce into conside-ration the wear and the severe abuse of vehicle traffic and the~
i:! , :, ' ~83~
stresses which are unavoidably applied by the vehicle passage thereover, in particular during positive and negative accelera-tions and even during emergency braking. An extremely destructive action is however exerted by the passage of snowplowing machines and vehicles, in particular of the type provided with snow flangers or blades designed and positioned for exerting a some-what doctoring action for scraping off and displacing away the snow layer from the road pavement surface. Those skilled in the art are well aware that no sharply protruding retroreflective element of the type referred to above can resist the scraping action of such snow removing means or, conversely, the entire tape material can be stripped or torn off from the road surface by a snow scraper implement impinging on such pro-truding elements, if exceptionally firmly secured to the tape material.
It is therefore an object of this invention to pro-vide a new and improved roadway surface making tape material which is substantially not prejudiced or affected by the pas-sage and action of currently used snowplowing machines, and -therefore capable of maintaining efficiency and nighttime visibility during wintertime or in any case when the weather requires even repeated snowplowing of the road surface.
Accordingly, the invention as herein claimed is a prefabricated pavement markiny tape, essentially comprising a unitary structure which includes an elongated tape portion securable to a pavement and having a substantially planar traffic-wear resistant upper surfacet a plurality of retro-reflective elements each having a lower section embedded in the tape portion and an upper section pro~ecting above the upper surface of the tape portlon to a predetermined height;
and at least one uninterrupted rail portion extending length-wise of the direction of elongation of the tape portion and B
:, , . . . : . .
83~L1Z
Eree of the retroreflective elements. The rail portion is on the upper surface of the tape portion and projects upwardly therefrom to a height which exceeds the aforementioned pre-determined height to which the upper sections of the retro-reflective elements pro~ect, so as to protect the tape portion and the upper sections of the retroreflective elements against impingement of and damage by a snowplow.
Accordlng to a preferred embodiment of the invention, this rail portion has a trapezoIdal cross-section and has ~ -io upwardly and inwardly inclined sides. It preferably also extends along the entire length of the tape portion.
Preferably also, there is provided an additional rail portion, both rail portions extending longitudinally along ~
the tape portion and being transversely spaced from each other ~ ~ -by a distance at most equal to the distance between two ends of ;~
a snowplow blade. Also, this additional portion is preferably secured to the upper surface of the tape portion in such a manner that it projects above the predetermined height, the multiplicity of retroreflective elements being between the rail portions. -These and other features of the invention and the service and advantages thereof will be made apparent from the following detailed description of preferred embodiments thereof, referring to the accompanying drawings, wherein:
Fig. 1 is a diagrammatical perspective view of a con-ventional snowplowing machine operating on and along a roadway having traffic regulating strip markings consisting of tape material secured to the pavement thereof;
Fig. 2 is a cross-sectional fragmentary enlarged view ~of the road surface grazing lower edge portion of any of the ploughshare snow removing means of the machine;
, r~
.
:.
FIG. 3 iS a perspective fragmentary view of an end ~:
portion of a marking tape constructed according to the invention;
FIGS. 4 and 5 are fragmentary cross-sectional views of :
examples of the structure and arrangement of the components of the tape of FIG. 3;
FIG. 6 is a fragmentary sectional view of a modified arrangement, taken along the plan indicated a VI-VI in E'IG. 7 wherein retroreflective elements are grouped ~- .
to form protruding structures arranged for slidably supporting a snow displacing means thereabove; :: :
FIG. 8 is a perspective fragmentary and partly sectional view of another embodiment of the tape material :
including differently arranged and protected groups of :
retroreflective elements;
` FIGS. 9 and 10 are enlarged, detailed and fragmentary sectional views of one group of the tape of FIG. 8, taken in a vertical plane parallel to and respectively perpendicular to the side edges of the tape, and FIG.ll is an exploded view of the structure of FIG.10, prior to its assembling.
The scope and the advantages of the invention will be made more evident upon a consideration of FIG. 1: a conventional snowploughing apparatus comprises a motor driven vehicle such as ~ , that generally indicated at N, provided with snow parting and laterally displacing ploughshare means or snow flangers V', secured at the fore body of the vehicle, and seldom with complemental side flangers V". Such plowing means are provided ~:
with a ground engaging lower edge portion L (details in FIG.2) of proper cross-sectional configuration and of given thickness Da adapted for sliding on the surface S of the roadway pavement, for .
engaging the base of the snow layer laying and seldom pressed and -/or frozen thereon. The operations of such implements do not :~
generally affect an uniformly produced and smooth surface S.
.:, . ., . - . ,. .
-, ... , ,: .,, . .. .. ~ :: . :
The operation is however extremely destructive for road surface markings, such as traffic lane dividing stripsM or edge de~ining strips M' (either continuous or discontinuous), in particular when such strips are formed by tape materials having an upper surface S having elements E, principally retro-reflective elements partly embedded within the mono- or multi-layer structure Sp (FIGS. 3 to 5 and 8 to 10) but substantially and sharply protruding of jutting above the generally planar upper face Su of the tape.
According to the embodiment of FIG. 3, the tape material M is provided with at least one and preferably two (or more) protruding component R (which can be compared to -"rails") firmly secured to the tape structure Sp and of height -H (FIGS. 3 and 4) above the actual upper face Su of the tape, greater than the height or jutting of the generally highest elements E. The upper narrow and elongated face of said elements form a surface on which the blade or blades L of the snowplowing means, which are therefore caused to run on a plane (the trace of which is indicated at P-P) spaced above the said upper face Su at said height H, thus passing above the elements E.
Preferably, said components or rails R are arranged lengthwise of the tape material ~ and spaced each to other less than the actual width Ll of the tape,that is noticeably inwardly of the very side edges of the tape.
At their end portions, the rails R are tapered to form sloping surfaces P' (FIG.3) along which the snowplowing means can effortlessly slide and be progressively raised at the height H of the slide plane P-P above the elements E.
These rails or compo~ents ~ can be made of metal rods 10, such as of inox, or with extruded plastics resisting to wear, friction and stresses, such as polyester, polyurethane , nylons ~ -. ..
and the like. The roads are firmly secured to the tape structure say by means of adhesive, solvents and the like. iSaid rails can also . . . . , . : , ,, , : ., ,, . ,, , , . , , 33~
be made integral with the upper layer of the tape, such as by plastics extrusion process. Alternatively, the rails can comprise a pressure resistent core (FIG. 4) coated by a resing impregnat-ed wear resisting fabric, which complements their connection to the tape structure. Same rails might have a tapered cross-sectional configuration (FIG. 5) and partially embedded into the tape upper layer to form a dove-tail connection.
In view of a most complete protection of the elements against the tearing-off action of the snowplowing means (and of broken ice pieces carried along therewith), an arrangement such as shown in FIGS. 6 and 7 can provide a valuable contribution.
Such arrangement comprises grouping each plurality of elements E
about a stress and wear resistant resinous body 16 having a flat upper surface 14, said groups being arranged on the surface Su of the tape at spacings I (in the direction A in which the snow-plowing implement is assumed to travel on the road) less than the said width Da Of the lower road engaging edge portion of the implements.
The embodiment shown in EIGS. 8 to 11 consists of road surface marking tape material M" provided with grouped highly efficient upwardly protruding retroreflective elements. This emr bodiment is particularly but not exclusively advantageous for ensuring the visibility at distance of highways edge lines and other traffic dividing lines which are generally assumed to be not crossed by the uehicles. Retroreflective elements E' each having a sharply protruding dome or part-spherically shaped pro-truding portion and a generally flattened lower portion having reflectorized retorcollimating beads secured thereto (these features do not form part of the present invention), are grouped in rows extended transversally of the tape at proper intervals I' therealong.
Each group is formed and arranged to form an unitary ;~
retroreflective device including said elements and means for pro- ~ -~6- ~
33~
tecting same against the destructive action of snowplowing imple-ments, each device being generally indicated at C and its protective component at R' (as being alternative to the rails R
of FIG. 3). Said component R' is transversally arranged on the tape surface Su and bridges above the row of elements E'. It comprises a cross bar or beam 28 having recesses 36 into which neck portions 24 can be engaged and secured for improving the rigidity and the resistance of the device. The said beam 28 is integrally :Eormed with side or leg portions 30 having foot portions adapted to be partially embedded into and secured to the upper layer Su of the tape, suitably locally thickened as indicated at 26 (FIG.9) and at 26' (FIG. 10) for best connection with the said protective component R' and respectively with the lower portions of the elements ~
During the operation of the snowplowing, the snow parting and displacing implements thereof pass successively above the various devices C by upwardly sliding along sloping surfaces formed by the same side portions 30 of the protective component R'. One slope is illustrated in FIG. 9. The said sloping surfaces can be formed and arranged in one direction only (as shown) on the premise that a snowplowing machine will travel in one given direction only, when in service, but the said side portions 30 can be however provided with symmetrical slopes for facilitating the passage of the snowplowing machine in both directions, such as in two-way rather narrow mountain or country roadways.
~'`"'''~ , '.' ' . ' . ' ' . ~ , ., , . '. ':: ~
Claims (11)
1. A prefabricated pavement marking tape, comprising a unitary structure including an elongated tape portion securable to a pavement and having a substantially planar traffic-wear resistant upper surface; a plurality of retroreflective elements each having a lower section embedded in said tape portion and an upper section projecting above said upper surface of said tape portion to a predetermined height; and at least one uninter-rupted rail portion extending lengthwise of the direction of elongation of said tape portion and being free of said retro-reflective elements, said rail portion being provided on said upper surface of said tape portion and projecting upwardly therefrom to a height exceeding the predetermined height to which said upper sections of said retroreflective elements project, so as to protect said tape portion and said upper sections of said retroreflective elements against impingement of and damage by a snowplow.
2. The tape of claim 1, said rail portion having a trapezoidal cross-section and having upwardly and inwardly inclining sides.
3. The tape of claim 1, said rail portion having a metal core and a wear-resistant resin coating, and extending along the entire length of said tape portion.
4. The tape of claim 1, further comprising an additional rail portion, both rail portions extending longitu-dinally along said tape portion and being transversely spaced from each other by a distance at most equal to the distance between two ends of a snowplow blade, said additional rail portion also being fixed to said upper surface of said tape portion in such a manner that said additional rail portion projects above said predetermined height, said multiplicity of retroreflective elements being between said rail portions.
5. The tape of claim 4, said rail portions being parallel to each other.
6. The tape of claim 4, each of said rail portions having a bevelled upper face.
7. The tape of claim 4, each of said rail portions being positioned along and adjacent to a respective one of the side edges of said tape portion.
8. The tape of claim 4, said rail portions each having a cross-sectional configuration upon which a snowplow blade is slideable, and each being made from a material which is non-malleable and non-ductile at temperatures to which a road surface will be subjected.
9. The tape of claim 4, said rail portions being integral with said portion tape.
10. The tape of claim 4, each respective rail portion having two opposite end portions each of which is upwardly sloped in the direction of the center of the respective rail portion.
11. The tape of claim 10, said rail portions being symmetrically sloped.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22352A/76 | 1976-04-15 | ||
| IT22352/76A IT1059130B (en) | 1976-04-15 | 1976-04-15 | IMPROVEMENT IN THE MANUFACTURE OF TAPE MATERIAL FOR HORIZONTAL ROAD LETHICS AND RELATED SIGNAL MATERIAL PERFECT ZIONATE RESISTANT TO THE ACTION OF MACHINE STRUCTURE AND THREE SPARTI SNOW |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1083112A true CA1083112A (en) | 1980-08-05 |
Family
ID=11195079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,149A Expired CA1083112A (en) | 1976-04-15 | 1977-04-14 | Snowplowing resisting road surface marking tape material |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1083112A (en) |
| IT (1) | IT1059130B (en) |
| NO (1) | NO771306L (en) |
| SE (1) | SE7704218L (en) |
-
1976
- 1976-04-15 IT IT22352/76A patent/IT1059130B/en active
-
1977
- 1977-04-13 SE SE7704218A patent/SE7704218L/en unknown
- 1977-04-14 NO NO771306A patent/NO771306L/en unknown
- 1977-04-14 CA CA276,149A patent/CA1083112A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1059130B (en) | 1982-05-31 |
| SE7704218L (en) | 1977-10-16 |
| NO771306L (en) | 1977-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |