Snowplowing resisting road surface marking tape material

• US 4,129,673 A
• Filed: 04/13/1977
• Issued: 12/12/1978
• Est. Priority Date: 04/15/1976
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Ludwig Eigenmann
• Inventors: Eigenmann, Ludwig
• Primary Examiner(s): Silverman, Stanley S.
• Application Number:
  US05/787,072
• Time in Patent Office: 608 Days
• Field of Search: 428/40, 428/156, 428/167, 428/168, 428/172, 428/323, 428/325, 428/327, 428/343, 428/354, 428/913, 404/9, 404/12, 404/14, 404/19, 350/102, 350/103, 350/105, 350/106, 350/109
• US Class Current: 428/172
• CPC Class Codes: E01F 9/578 consisting of preformed elements, e.g. tapes, block-type elements specially designed or arranged to make up a traffic line E01F9/582, E01F9/588, E01F9/594 take precedence; studs, blocks or like markers per se E01F9/553
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24479 including variation in thickness
• CPC Class Codes: Y10T 428/24612 Composite web or sheet

Abstract

An improved roadway surface marking tape material of the kind provided with retroreflective elements or other visibility and/or anti-skid improving elements, upwardly protruding over the generally planar upper face of the tape, the new tape being improved by the provision of further protruding components secured to said upper layer, of height over said face, greater than that of such elements, and comprising sloping portions, for raising snowplowing implements passing over the marking, and causing such implement to slide above said elements, without interfering with the same and therefore protecting them against the destructive action of said snowplowing means.

Claims

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 uninterrupted rail portion extending lengthwise of the direction of elongation of said tape portion and being free of said retroreflective 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 longitudinally 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.