US3679202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double sheet detecting and locking arrangement
Assignee: Agfa Gevaert AG
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Filing: 1970-02-18
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Granted: 1972-07-25
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Expires: 1990-02-18
Abstract
Abstract An arrangement in a microfilm flow type camera for detecting the presence of a double sheet and for automatically deactivating the transport means for feeding sheets to be photographed on microfilm through the camera when a double sheet has been detected. The arrangement comprises a pair of oppositely arranged feelers between which a sample sheet can be inserted. One feeler of the pair of feelers is operatively connected to one roller of a pair of oppositely arranged rollers between which the sheets to be photographed on microfilm are being passed. One roller of the pair of rollers is operatively connected to a switch in the circuit of the transport mechanism for transporting sheets to be photographed through the camera. The distance between the pair of rollers is slightly larger than the distance between the pair of feelers so that when a double sheet passes between the pair of rollers the switch deactivates the transport mechanism of the camera.
Inventors
- 👤 Walter Rauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
B; B65; B65H; B65H7/00; B65H7/02; B65H7/06; B65H7/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
In a microfilm camera having means for transporting sheets therethrough to be photographed on microfilm, an arrangement for detecting the presence of double sheets and for automatically deactivating said transporting means when a double sheet has been detected, comprising in combination, a pair of oppositely disposed feelers operatively mounted in said camera and adapted to sense the thickness of a sample sheet being inserted therebetween, a sample sheet adapted to be disposed between said pair of feelers during operation of the arrangement to automatically maintain said pair of feelers at a predetermined distance from each other, a pair of oppositely disposed members operatively mounted in said camera and adapted to sense the thickness of sheets to be photographed by said camera which pass therebetween, and switching means operatively connected to said pair of members and said transporting means and adapted to deactivate said transporting means when said pair of members sense a double sheet passing therebetween which causes the distance of said pair of members to exceed a distance as determined by said pair of feelers, said pair of feelers operatively coacting with said switching means and said pair of members, at least one feeler of said pair of feelers directly acting on one member of said pair of members.
Claim 2
Dependent Claim
210 words
In a microfilm camera having means for transporting sheets therethrough to be photographed on microfilm, an arrangement for detecting the presence of double sheets and for automatically deactivating said transporting means when a double sheet has been detected, comprising in combination, a pair of oppositely disposed feelers operatively mounted in said camera and adapted to sense the thickness of a sample sheet being inserted therebetween, a sample sheet adapted to be disposed between said pair of feelers during operation of the arrangement to automatically maintain said pair of feelers at a predetermined distance from each other, a pair of oppositely disposed members operatively mounted in said camera and adapted to sense the thickness of sheets to be photographed by said camera which pass therebetween, and switching means operatively connected to said pair of members and said transporting means and adapted to deactivate said transporting means when said pair of members sense a double sheet passing therebetween which causes the distance of said pair of members to exceed a distance as determined by said pair of feelers, said pair of feelers operatively coacting with said switching means and said pair of members, at least one feeler of said pair of feelers directly acting on one member of said pair of members.
Claim 3
Dependent Claim
77 words
In a microfilm camera having means for transporting sheets to be photographed on microfilm therethrough, an arrangement for detecting the presence of double sheets and for automatically deactivating said transport means when a double sheet has been detected as set forth in claim 1, wherein one member of said pair of members is connected to one feeler of said pair of feelers and the other member of said pair of members is connected to said switching means.
Claim 4
Dependent Claim
89 words
In a microfilm camera having means for transporting sheets to be photographed on microfilm therethrough an arrangement for detecting the presence of double sheets and for automatically deactivating said transport means when a double sheet has been detected as set forth in claim 1, wherein said switching means comprises a pair of contacts, one contact of said pair of contacts being connected to one feeler of said pair of feelers and the other contact of said pair of contacts being connected to one member of said pair of members.
Claim 5
Dependent Claim
51 words
In a microfilm camera having means for transporting sheets to be photographed on microfilm therethrough, an arrangement for detecting the presence of double sheets and for automatically deactivating said transport means when a double sheet has been detected as set forth in claim 1, wherein said switching means comprise a microswitch.
Claim 6
Dependent Claim
58 words
In a microfilm camera having means for transporting sheets to be photographed on microfilm therethrough, an arrangement for detecting the presence of double sheets and for automatically deactivating said transport means when a double sheet has been detected as set forth in claim 1, wherein each member of said pair of members comprises a roller rotatably mounted thereon.
Claim 7
Dependent Claim
82 words
In a microfilm camera having means for transporting sheets to be photographed on microfilm therethrough, an arrangement for detecting the presence of double sheets and for automatically deactivating said transport means when a double sheet has been detected as set forth in claim 1, wherein the distance between said pair of members, when said switching means are not deactivating said transporting means, exceeds the distance between said pair of feelers, when a sample sheet has been inserted therebetween, by a predetermined amount.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |