US4322177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and devices for forming highly retro-reflecting roadway surface marking
Assignee: 3M Co
•
Filing: 1979-07-02
•
Granted: 1982-03-30
•
Expires: 1999-07-02
Abstract
Abstract Method for forming a retro reflective traffic regulating road surface marking and roadable areas produced therewith.
Inventors
- 👤 Ludwig Eigenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:09
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/16; E01C23/18; E01F; E01F9/00; E01F9/50; E01F9/506; E01F9/518; E01F9/524; E01F9/576; E01F9/578
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A device for forming retro-reflective traffic regulating signs on road surfaces by applying retro-reflective elements to a marking layer of traffic wear-resistant material comprising means for supplying a flow of retro-reflective elements; means for aligning said retro-reflective elements, said aligning means being operatively connected to said supplying means to receive said elements therefrom and aligning the same in predetermined rows; means for advancing said rows to a position facing the surface of the marking layer; and pressure-operative means for applying said rows to the marking layer under pressure in a direction normal to the elongation of the marking layer and to the light beams emanating from vehicles travelling along the road surface.
Claim 2
Independent Claim
112 words
A device for forming retro-reflective traffic regulating signs on road surfaces by applying retro-reflective elements to a marking layer of traffic wear-resistant material comprising means for supplying a flow of retro-reflective elements; means for aligning said retro-reflective elements, said aligning means being operatively connected to said supplying means to receive said elements therefrom and aligning the same in predetermined rows; means for advancing said rows to a position facing the surface of the marking layer; and pressure-operative means for applying said rows to the marking layer under pressure in a direction normal to the elongation of the marking layer and to the light beams emanating from vehicles travelling along the road surface.
Claim 3
Dependent Claim
13 words
The device of claim 1, wherein said applying means are pressurized air actuated.
Claim 4
Dependent Claim
26 words
The device of claim 2, wherein said advancing means include suction actuated means for retaining said rows during the advancing movement thereof toward said facing position.
Claim 5
Dependent Claim
43 words
The device of claim 3, wherein said aligning means, said advancing means and said applying means include a hollow rotary cylinder formed with a plurality of rows of holes arranged on the periphery thereof to receive and align the retro-reflective elements in rows.
Claim 6
Dependent Claim
23 words
The device of claim 4, further including a source of vacuum located within said hollow cylinder and operatively connected with said retaining means.
Claim 7
Dependent Claim
52 words
The device of claim 5, wherein a stationary element is positioned within said hollow cylinder, said stationary element being formed with a duct connected to a source of pressurized air and adapted to apply a predetermined pressure to a row of the retro-reflective elements when the latter is in said facing position.
References Cited (Backward Citations)
US1885941A
Cited
US2187879A
Cited
US2232023A
Cited
US2268538A
Cited
US2783730A
Cited
US3086431A
Cited
US3277800A
Cited
US3274888A
Cited
US3240132A
Cited
US3418896A
Cited
US3587415A
Cited
US3575092A
Cited
US3590701A
Cited
US3768383A
Cited
US3964835A
Cited
US3964821A
Cited
US4049337A
Cited
US3958891A
Cited
US4069281A
Cited
US4072403A
Cited
US4136991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |