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US4887126A Expired / Lapsed US ⏱️ 0.0 years remaining

Reproduction camera

Assignee: Eskofot AS
•
Filing: 1988-04-14
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Granted: 1989-12-12
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Expires: 2008-04-14
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Abstract

Abstract A reproduction camera comprising an original plane, an objective plane, and a picture plane, a raster, a film, and a preferably transparent recording sheet being situated on a glass plate in the picture plane, and a rubber cover optionally being situated on the recording sheet during a reproduction. The recording sheet is preferably adhered along one side to the glass plate therebelow. Static electricity may, however, occur when a rubber cover in a pivotably mounted lid has been pressed towards the adhered recording sheet and is subsequently opened. The attractive force between the cover and the recording sheet caused by the charge may become so strong that the recording sheet follows the lid when said lid is opened. In addition the operator can be subjected to electric shocks. These problems have according to the invention been solved by the preferably transparent recording sheet being made electrically conductive, and by discharging the recording sheet when the rubber cover is removed from said recording sheet.

Inventors

  • 👤 Finn Hougaard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 14:48
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/581

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 58 words
A reproduction camera comprising an original plane, an objective plane, and a picture plane, a raster, a film, and a preferably transparent recording sheet being situated on a glass plate in the picture plane, and a rubber cover optionally being situated on the recording sheet during a reproduction, wherein the preferably transparent recording sheet (11) is electrically conductive.
Claim 2
Dependent Claim 58 words
A reproduction camera comprising an original plane, an objective plane, and a picture plane, a raster, a film, and a preferably transparent recording sheet being situated on a glass plate in the picture plane, and a rubber cover optionally being situated on the recording sheet during a reproduction, wherein the preferably transparent recording sheet (11) is electrically conductive.
Claim 3
Dependent Claim 27 words
A reproduction camera as in claim 1, wherein means are provided which discharge the recording sheet when the rubber cover (12) is removed from the recording sheet.
Claim 4
Dependent Claim 18 words
A reproduction camera as in claim 2, wherein the electrically conductive recording sheet (11) is connected to earth.
Claim 5
Dependent Claim 24 words
A reproduction camera as in claim 2, wherein the rubber cover (12) is electrically conductive and is electrically connected to the recording sheet (11).
Claim 6
Dependent Claim 19 words
A reproduction camera as in claim 1, wherein the recording sheet (11) is only electrically conductive on the surface.
Claim 7
Dependent Claim 34 words
A reproduction camera as in claim 5, wherein the recording sheet on the surface comprises a pattern of conductive paths of an optically absorptive material, said pattern being excluded during the reproduction (FIG. 3).
Claim 8
Dependent Claim 19 words
A reproduction camera as in claim 6, wherein the optically absorptive material is a mixture of silver and carbon.

References Cited (Backward Citations)

US3672758A Cited
GB1221777A Cited
US3677640A Cited
US3888586A Cited
GB2038502A Cited
GB2086689A Cited
GB2099181A Cited
US4474457A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-12-11 1993-06-12 1993-12-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-12-11 1997-06-12 1997-12-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-12-11 2001-06-12 2001-12-12 $7700.00 Window Closed / Lapsed

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