Patent US3802887A successfully refreshed from Google Patents.
US3802887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large format,self-developing,photographic film unit
Assignee: Polaroid Corp
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Filing: 1972-05-12
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Granted: 1974-04-09
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Expires: 1992-05-12
Abstract
Abstract A large format, self-developing, film unit which is specially configured for use with a unique film holding cassette and drum processor for distributing a fluid processing composition between photosensitive and image-receiving elements of the film unit. Each film unit element includes a leader having registration structure integrally formed therewith such that the photosensitive and image-receiving elements may be accurately registered with one another and the processing drum.
Inventors
- 👤 D Sorli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:44
CPC Classifications
G; G03; G03D; G03D9/00; G03D9/02; G03B; G03B17/00; G03B17/28; G03B17/32; G03B17/34; G03C; G03C8/00; G03C8/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A film unit as defined in claim 1 wherein said first and second leader means include, respectively, first and second forwardly extending centrally disposed tabs, and said first and second registration means includes, respectively, planar leading edges of said first and second tabs which are adapted to bear against the locating surface on the drum to register said first and second film elements with one another and the circumference of the drum.
Claim 2
Dependent Claim
52 words
A film unit as defined in claim 2 wherein said first and second tabs on said first and second leader means are adapted to be engaged by the latching device on the drum so that said first and second tabs serve to couple said first and second film elements to the drum.
Claim 3
Dependent Claim
32 words
A film unit as defined in claim 1 wherein said first film element further includes a removable opaque envelope enclosing said first support sheet having said photosensitive layer on one side thereof.
Claim 4
Dependent Claim
62 words
A film unit as defined in claim 4 wherein said first film element is adapted to be held in a light-tight cassette and said film unit includes means for releasably securing said first leader means to the leading end of the cassette such that said opaque envelope may be withdrawn from said first support sheet from the trailing end of the cassette.
Claim 5
Dependent Claim
174 words
A film unit as defined in claim 1 wherein said first leader means includes a first centrally disposed and forwardly extending tab which is adapted to be engaged by the latching device associated with the drum to releasably secure said first leader means to said drum, and a tapered section intermediate said first tab and said leading end of said first support sheet, said first registration means including a leading planar edge of said tapered section adjacent to and extending transversely of said first tab, and said second leader means includes a second tab having a transverse elongated slot therein through which said first tab is adapted to be inserted, said leading planar edge of said tapered section on said first leader means being wider than said slot so as not to pass therethrough, said second registration means including portions of said second tab to the sides of said slot against which said leading planar edge of said tapered section bears to couple and register said first and second film unit with one another.
Claim 6
Dependent Claim
57 words
A film unit as defined in claim 6 wherein said fIrst registration means further includes a planar leading edge on said first tab, said planar leading edge being adapted to bear against the locating surface associated with the drum for registering said first and second film unit elements, now coupled together, with the circumference of the drum.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |