US3628871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical color printing analysis device and method
Assignee: Individual
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Filing: 1969-10-06
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Granted: 1971-12-21
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Expires: 1989-10-06
Abstract
Abstract An optical magnifying lens is mounted as part of a manually portable color printing analysis device which has support means adapted to position the lens properly above a color print surface to be inspected. A light on the device illuminates the surface, and a color filter is mounted for selective movement into the field between the lens and surface. The filter color is complementary to the color of that part of the surface to be checked. For example, a blue filter is provided for inspection of yellow printed surfaces. Preferably one or more such color filters are mounted on a filter plate movably supported on a body portion of the device, which body portion also serves as a handle and battery case. Inspection of the surface through the magnifying lens and filter provides an enlarged dark contrast image of the desired color printed areas, such as the colored dot portion of a colored halftone sheet, even though some of the colors to be inspected are partially overprinted by other colors.
Inventors
- 👤 Anders B Himmelstrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
144 words
An optical color printing analysis device for analyzing color dot pattern comprising a body portion having support means for removably positioning the body above a color dot pattern to be inspected, a magnifying lens unit mounted on said body portion and having a field of view directed toward and focusable on said color dot pattern, a plurality of optical filters each passing a preselected band of color, color filter support means on said device for selectively positioning one of said filters of a color complementary to a component color of the color dot pattern being analyzed in said field of view betweeN said unit and the surface to be inspected, and means providing for direct illumination below the filter of the surface to be inspected by a source of light comprising several color components including that of the color dot pattern to be analyzed.
Claim 2
Dependent Claim
144 words
An optical color printing analysis device for analyzing color dot pattern comprising a body portion having support means for removably positioning the body above a color dot pattern to be inspected, a magnifying lens unit mounted on said body portion and having a field of view directed toward and focusable on said color dot pattern, a plurality of optical filters each passing a preselected band of color, color filter support means on said device for selectively positioning one of said filters of a color complementary to a component color of the color dot pattern being analyzed in said field of view betweeN said unit and the surface to be inspected, and means providing for direct illumination below the filter of the surface to be inspected by a source of light comprising several color components including that of the color dot pattern to be analyzed.
Claim 3
Dependent Claim
48 words
A color printing analysis device according to claim 1 in which said color filter support means includes a filter support member movably mounted on said body portion for movement between a plurality of positions in which different ones of said filters are positioned in said field of view.
Claim 4
Dependent Claim
50 words
A color printing analysis device according to claim 2 in which said body portion has a slot extending generally parallel to the plane of the surface to be inspected, said filter support member being mounted in said slot and having a manually accessible operating portion projecting laterally from said slot.
Claim 5
Dependent Claim
20 words
A color printing analysis device according to claim 3 in which said filter support is slidably mounted in said slot.
Claim 6
Dependent Claim
32 words
A color printing analysis device according to claim 1 in which said illuminating means include lighting means mounted on said body portion and having a field of illumination directed toward such surface.
Claim 7
Dependent Claim
28 words
A colored printing analysis device according to claim 5 in which said lighting means provides a generally white light and one of said filters is a blue filter.
Claim 8
Dependent Claim
91 words
A color printing analysis device according to claim 5 in which said lighting means provides a generally white light including red, green and blue components, said device having a clear area and separate red, green and blue filters on said filter support, and said filter support being selectively movable to a first position in which the clear area is in said field of view and second, third and fourth positions in each of which a different one of said red, green and blue filters is positioned in said field of view.
Claim 9
Dependent Claim
105 words
A color printing analysis device according to claim 5 in which said lighting means provides a generally white light including red, green and blue components, said filter support comprising a circular plate member mounted for rotary movement about an axis passing through the center of the plate generally perpendicular to both the plate and to the plane of the flat surface of the handle section, said filter support having said clear area and separate red, green and blue filter areas all spaced circumferentially around said axis of rotary movement for selective alignment of any of said clear and filter areas with said field of view.
Claim 10
Dependent Claim
57 words
A color printing analysis device according to claim 2 in which said filter support member comprises a plate member mounted for rotary movement about an axis generally perpendicular to the surface to be inspected, at least a portion of the plate member projecting laterally beyond said body portion for convenient manual actuation from one position to another.
Claim 11
Dependent Claim
151 words
A color printing analysis device according to claim 9 in which said body portion has an elongated handle section shaped for convenient holding in an operator''s hand, said handle section having a generally flat longitudinally extending surface constituting the support means for positioning the body on the surface to be inspected, said filter plate portion projecting laterally beyond the body portion at a location conveniently accessible for operation by a portion of an operator''s hand, said body portion including electrical energizing means therein, manually operable switch means connected between energizing means and light source for selective energization of said source, said switch means being mounted on the body portion at a location conveniently accessible for operation by a portion of the operator''s hand, and said magnifying lens unit being mounted at one end of said body portion beyond the area of the handle section which is normally grasped by an operator.
Claim 12
Dependent Claim
38 words
A color printing analysis device according to claim 2 having means for manual focusing adjustment of said lens unit, and said lens unit including an inTernal scale for visual measurement of portions of the surface to be inspected.
Claim 13
Independent Claim
158 words
A method of analyzing a colored halftone sheet having a colored dot pattern thereon with a manually portable analysis device having a magnifying lens unit and a plurality of selectively positionable optical filters each passing a preselected band of color, said method comprising positioning the analysis device on the colored dot pattern of the halftone sheet with the lens unit above the sheet and having a field of view directed toward the sheet and focused on the dot pattern thereon, illuminating said sheet and dot pattern directly with a light which includes components corresponding to each of said dot and filter colors, selectively positioning, in the field of view between the lens unit and sheet, a color filter of a color complementary to the color dot pattern being analyzed, and viewing the sheet through said lens unit and complementary color filter, thereby providing an enlarged, dark contrast image of the colored dot pattern as seen through said device.
Claim 14
Independent Claim
158 words
A method of analyzing a colored halftone sheet having a colored dot pattern thereon with a manually portable analysis device having a magnifying lens unit and a plurality of selectively positionable optical filters each passing a preselected band of color, said method comprising positioning the analysis device on the colored dot pattern of the halftone sheet with the lens unit above the sheet and having a field of view directed toward the sheet and focused on the dot pattern thereon, illuminating said sheet and dot pattern directly with a light which includes components corresponding to each of said dot and filter colors, selectively positioning, in the field of view between the lens unit and sheet, a color filter of a color complementary to the color dot pattern being analyzed, and viewing the sheet through said lens unit and complementary color filter, thereby providing an enlarged, dark contrast image of the colored dot pattern as seen through said device.
Claim 15
Dependent Claim
94 words
A method according to claim 12 in which said halftone sheet is a multicolored halftone sheet having a plurality of differently colored dot patterns thereon, some of the dots of one color being printed over portions of dots of another color, the respective optical filters having colors complementary to respective dot pattern colors, said method comprising selectively positioning one color filter at a time between the illuminated dot pattern and the lens unit, thereby providing an enlarged dark contrast image of the specific color dot pattern for which that one color filter is complementary.
Claim 16
Dependent Claim
122 words
A method according to claim 13 in which the halftone sheet comprises three differently colored dot patterns printed in three different subtractive colors with some of the dots of one subtractive color being printed over portions of dots of a second subtractive color and with some of said dot portions of the second subtractive color printed over areas of dots of a third subtractive color, said method comprising illuminating said sheet and dot patterns with a generally white light which includes color components corresponding to all of said dot and filter colors, the selective positioning of a particular color filter providing an enlarged dark contrast complete image of only that subtractive color dot pattern for which that particular filter color is complementary.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |