Patent US3762822A successfully refreshed from Google Patents.
US3762822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically inspecting the position and size of magnetic stripes on a movable web
Assignee: Individual
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Filing: 1972-07-13
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Granted: 1973-10-02
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Expires: 1992-07-13
Abstract
Abstract This invention relates to an device for inspecting the location of marks on a travelling web. The web passes over a translucent rotatable roller having in the centre a light source. On the other side of the web a microscope is so located that an enlarged view of a portion of the web is observable. The location of the marks is determined with reference to a reticle viewed through the microscope.
Inventors
- 👤 E Harvey
- 👤 P Marter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:00
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
An inspection device for inspecting the location of applied marks or magnetic stripes on a travellinG transparent photosensitive web which device comprises a translucent rotatable roller over which the travelling web passes, the said rotatable roller having axially positioned in the centre thereof a source of non-actinic light appropriate to the photosensitive web, there being positioned on the other side of the travelling web opposite the source of light a microscope so located that an enlarged view of a portion of the travelling web is observable in the eye-piece of the microscope.
Claim 2
Dependent Claim
92 words
An inspection device for inspecting the location of applied marks or magnetic stripes on a travellinG transparent photosensitive web which device comprises a translucent rotatable roller over which the travelling web passes, the said rotatable roller having axially positioned in the centre thereof a source of non-actinic light appropriate to the photosensitive web, there being positioned on the other side of the travelling web opposite the source of light a microscope so located that an enlarged view of a portion of the travelling web is observable in the eye-piece of the microscope.
Claim 3
Dependent Claim
65 words
An inspection device according to claim 1 wherein the source of light comprises a white-light tungsten filament bulb covered by a light-opaque cover which comprises a filter which allows only light of wavelengths to which the photosensitive is not sensitive to pass the filter being so located that the filtered light is able to pass from the source through the transparent web to the microscope.
Claim 4
Dependent Claim
31 words
An inspection device according to claim 1 wherein the photosensitive web is sensitive only to the blue region of the visible spectrum and the light source consists of a sodium lamp.
Claim 5
Dependent Claim
34 words
An inspection device according to claim 1 wherein the light source is a selected light-emitting diode; the diode being selected so that the light emitted therefrom is non-actinic in regard to the photosensitive web.
Claim 6
Dependent Claim
33 words
An inspection device according to claim 1 wherein the microscope is moveable laterally in regard to the path of the travelling web so that various portions of the travelling web can be viewed.
Claim 7
Dependent Claim
66 words
An inspection device according to claim 1 which further comprises a semi-reflecting mirror located between the travelling web and the microscope and set at 45* to the path of the light therebetween, there being present an illuminated graticule which is so located in relation to the mirrorthat the lines on the graticule are superimposed on the image obtained in the microscope by viewing the travelling web.
Claim 8
Dependent Claim
19 words
An inspection device according to claim 1 wherein the light translucent roller is made of polytetrafluorethylene or a polyacetol.
Claim 9
Dependent Claim
26 words
An inspection device according to claim 1 wherein means are provided for guiding at least one edge of the travelling web as it passes the microscope.
Claim 10
Dependent Claim
18 words
An inspection device according to claim 8 wherein the guiding means comprises a flange on the translucent roller.
Claim 11
Dependent Claim
27 words
An inspection device according to claim 8 wherein the guiding means comprises a straight-edge positioned so that one edge of the travelling web is biased against it.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |