Claims
- 1. A roadway marker strip for adhesive attachment along a bottom surface of the strip to a roadway, comprising a rubber-like sheet having a bottom layer and flat surface which posses cold-flow substantially memory-free characteristics and an upper layer and surface from which incident light from a vehicle traveling along the roadway may be reflected to indicate a roadway direction, said upper layer and surface of the sheet only being cross-link-vulcanized so as to possess substantial memory enabling restoration of depression of the upper surface caused by a vehicle, while the sheet bottom layer remains unvulcanized and conformably adheres to the roadway.
- 2. A roadway marker strip as claimed in claim 1, and in which the said upper layer and surface is modified by successively positioned partially embedded retroreflective bead protuberances therein.
- 3. A roadway marker strip as claimed in claim 1, and in which the said upper layer and surface contains successively positioned retroreflective beads therein.
Parent Case Info
This is a division of application Ser. No. 630,081 filed Dec. 19, 1990; which is a division of application Ser. No. 611,315 filed Nov. 13, 1990 (now U.S. Pat. No. 5,087,148); which is a continuation of application Ser. No. 309,213 filed Feb. 10, 1989 (now abandoned).
US Referenced Citations (12)
Divisions (2)
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Number |
Date |
Country |
Parent |
630081 |
Dec 1990 |
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Parent |
611135 |
Nov 1990 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
309312 |
Feb 1989 |
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