Time indicator
First Claim
1. A time indicator comprising:
- a first substrate having first and second surfaces and at least two indicia areas on the first surface;
a second substrate having first and second surfaces;
a first chemical agent on each of the indicia areas;
a second chemical agent on the first surface of the second substrate;
wherein the first surfaces of each substrate overlay and are in contact with each other, the first and second chemical agents coacting to cause a visually perceptible change at one of the second surfaces overlaying the first indicia area in a first selected time interval and a visually perceptible change in said second surface overlaying the second indicia area in a second selected time interval, the first selected time interval differing from the second selected time interval.
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Accused Products
Abstract
A time indicator is provided which includes a first substrate having first and second surfaces and at least two indicia areas on the first surface. A second substrate having first and second surfaces is also provided. A first chemical agent is provided on each of the indicia areas and a second chemical agent is provided on the first surface of the second substrate. The first surfaces of each substrate overlay and are in contact with each other, the chemical agents coacting to cause a visually perceptible change at one of the second surfaces overlaying the first indicia area in a first selected time interval and a visually perceptible change in said second surface overlaying the second indicia area in a second selected time interval, the first selected time interval differing from the second selected time interval. A preferred embodiment of the time indicator includes an ink pattern of dots printed in a preselected pattern in the indicia area and an adhesive activator means on the first surface of the second substrate. The ink and activator coact to cause the ink pattern of dots to gradually bleed and blend together to cause a visually perceptible change through the second substrate overlaying the indicia area in a selected time interval.
Preferred embodiments of the invention are self-timing parking permits and tickets.
155 Citations
26 Claims
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1. A time indicator comprising:
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a first substrate having first and second surfaces and at least two indicia areas on the first surface; a second substrate having first and second surfaces; a first chemical agent on each of the indicia areas; a second chemical agent on the first surface of the second substrate; wherein the first surfaces of each substrate overlay and are in contact with each other, the first and second chemical agents coacting to cause a visually perceptible change at one of the second surfaces overlaying the first indicia area in a first selected time interval and a visually perceptible change in said second surface overlaying the second indicia area in a second selected time interval, the first selected time interval differing from the second selected time interval.
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2. A time indicator comprising:
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a first substrate having first and second surfaces and at least two indicia areas on the first surface; a second substantially transparent substrate having first and second surfaces; an ink pattern on each of the indicia areas; an ink dissolver on the first surface of the second substrate; wherein the first surfaces of each substrate overlay and are in adhesive contact with each other, the ink and ink dissolver coacting to cause a migration of the ink causing a visually perceptible change through the transparent substrate overlaying the first indicia in a first selected time interval and a visually perceptible change through the transparent substrate overlaying the second indicia in a second selected time interval, the first selected time interval differing from the second selected time interval.
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3. A time indicator comprising:
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a first substrate having first and second surfaces and at least two indicia areas on the first surface; a second transparent substrate having first and second surfaces; an ink pattern of dots printed in a preselected pattern in each of the indicia areas, wherein the pattern differs in each indicia area; an adhesive activator means on the first surface of the transparent substrate; wherein, when the first surface of each substrate overlay and are in adhesive contact with each other, the ink and adhesive activator coact to adhesively bond the first substrate to the second transparent substrate and to dissolve the ink pattern of dots whereby the dots gradually bleed and blend together along the surface of the first substrate to cause a change visually perceptible through the transparent substrate overlaying the first indicia area in a first selected time interval and a change visually perceptible through the transparent substrate overlaying the second indicia area in a second selected time interval, the first time interval differing from the second time interval. - View Dependent Claims (4, 5, 6, 7)
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8. A time indicator comprising:
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a first substrate having first and second surfaces and an indicia area on the first surface; a second substrate having first and second surfaces; an ink pattern of dots printed in a preselected pattern in the indicia area; an activator means on the first surface of the second substrate; wherein, when the first surface of each substrate are in contact and overlay each other, the ink and activator coact to cause the ink pattern of dots to gradually bleed and blend together along the surface of the first substrate to cause a change visually perceptible through the second substrate overlaying the indicia area in a selected time interval. - View Dependent Claims (9, 10)
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11. A time indicator comprising:
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a first substrate having first and second surfaces and an indicia area on the first surface; a second transparent substrate having first and second surfaces; an ink pattern of dots printed in a preselected pattern in the indicia area; an adhesive activator means on the first surface of the transparent substrate; wherein, when the first surface of each substrate are in adhesive contact and overlay each other, the ink and adhesive activator coact to adhesively bond the first substrate to the second transparent substrate and to dissolve the ink pattern of dots whereby they gradually bleed and blend together along the surface of the first substrate to cause a change visually perceptible through the transparent substrate overlaying the indicia area in a selected time interval. - View Dependent Claims (12, 13)
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14. A substrate for a time indicator comprising first and second surfaces and at least two indicia areas on the first surface;
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a soluble ink pattern of dots printed in a preselected pattern in each of the indicia areas, wherein the pattern differs in each indicia area. - View Dependent Claims (15, 16, 17, 18)
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19. A substrate for a time indicator comprising first and second surfaces and an indicia area on the first surface;
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a soluble ink pattern of dots printed in a preselected pattern in the indicia area. - View Dependent Claims (20, 21)
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22. A time indicator comprising:
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a first substrate having first and second surfaces and a plurality of indicia areas on the first surface arranged in a clockwise pattern; a second transparent substrate having first and second surfaces; an ink pattern of dots printed in a preselected pattern in each of the indicia areas, wherein the pattern differs in each indicia area; an adhesive activator means on the first surface of the transparent substrate; wherein, when the first surface of each substrate overlay and are in adhesive contact with each other, the ink and adhesive activator coact to adhesively bond the first substrate to the second transparent substrate and to dissolve the ink pattern of dots whereby the dots gradually bleed and blend together along the surface of the first substrate to cause a change visually perceptible through the transparent substrate overlaying the indicia areas in a plurality of selected time intervals, the selected time intervals for each indicia area increasing in a clockwise pattern. - View Dependent Claims (23, 24, 25, 26)
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Specification