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US4423943A
Expired / Lapsed
US
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Photographic film assemblage having a non-lighttight film withdrawal opening
Assignee: Polaroid Corp
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Filing: 1982-04-02
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Granted: 1984-01-03
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Expires: 2002-04-02
Abstract
Abstract A photographic film assemblage including a film spool about which is wound a length of film, a housing for rotatably supporting the film spool such that a leading end of the film may be advanced to the exterior of the housing via a film withdrawal opening or passageway in the housing, and means for protecting the film from exposure by ambient light which passes freely through the passageway. The passageway is constructed such that relative rotation between the film spool and the housing, in a given direction, is all that is needed to move the leading end of the film to the exterior of the housing via the passageway.
Inventors
- 👤 Nicholas Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:20
CPC Classifications
G; G03; G03C; G03C3/00; G03B; G03B17/00; G03B17/28; G03B17/30; G03B2217/00; G03B2217/26; G03B2217/266
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
200 words
A photographic film assemblage comprising: a film spool; a strip of photographic film coiled about said film spool, said film having a leading end which is adapted to be attached to a film advance apparatus; means for protecting said film from premature exposure by ambient light, said exposure protecting means comprising a sheet of opaque material secured in overlaying relation to at least the entire length of an outer convolution of said film, a pair of spaced collars located on said film spool, said collars being spaced from each other by a distance substantially equal to the width of said film, and an annular flange extending inwardly from each of said collars into overlaying relation with the edges of said film; and a housing for rotatably supporting said film spool and said film, said housing including means defining a passageway through which said leading end of said film may be freely advanced to the exterior of said housing and into the ambient light by rotating said film spool relative to said housing, said passageway has a width less than the width of said film thereby causing said film to be bowed widthwise prior to being wound upon said film spool.
Claim 2
Dependent Claim
200 words
A photographic film assemblage comprising: a film spool; a strip of photographic film coiled about said film spool, said film having a leading end which is adapted to be attached to a film advance apparatus; means for protecting said film from premature exposure by ambient light, said exposure protecting means comprising a sheet of opaque material secured in overlaying relation to at least the entire length of an outer convolution of said film, a pair of spaced collars located on said film spool, said collars being spaced from each other by a distance substantially equal to the width of said film, and an annular flange extending inwardly from each of said collars into overlaying relation with the edges of said film; and a housing for rotatably supporting said film spool and said film, said housing including means defining a passageway through which said leading end of said film may be freely advanced to the exterior of said housing and into the ambient light by rotating said film spool relative to said housing, said passageway has a width less than the width of said film thereby causing said film to be bowed widthwise prior to being wound upon said film spool.
Claim 3
Dependent Claim
27 words
A photographic film assemblage as defined in claim 1 wherein the width of said passageway is less than the distance between facing surfaces of said annular flanges.
Claim 4
Dependent Claim
187 words
A photographic film assemblage comprising: a film spool having a pair of spaced collars for confining therebetween the opposite sides of a roll of film, and an annular flange extending from a face of each of said collars toward each other so as to overlay the edges of the outermost convolution of a roll of film and control its maximum diameter; a strip of photographic film coiled about said film spool with its opposite edges confined between said collars and with the edges of the outermost convolution of said film being encompassed by said annular flanges, said film having a leading end which is adapted to be attached to a film advance mechanism; and a housing for rotatably supporting said film spool and said film, said housing having means defining a passageway through which said film may be advanced to the exterior of said housing via said passageway, said passageway having a width less than the width of said film whereby said film is bowed transversely as it passes through said passageway thereby facilitating the movement of said film under and out from under said annular flanges.
Claim 5
Dependent Claim
187 words
A photographic film assemblage comprising: a film spool having a pair of spaced collars for confining therebetween the opposite sides of a roll of film, and an annular flange extending from a face of each of said collars toward each other so as to overlay the edges of the outermost convolution of a roll of film and control its maximum diameter; a strip of photographic film coiled about said film spool with its opposite edges confined between said collars and with the edges of the outermost convolution of said film being encompassed by said annular flanges, said film having a leading end which is adapted to be attached to a film advance mechanism; and a housing for rotatably supporting said film spool and said film, said housing having means defining a passageway through which said film may be advanced to the exterior of said housing via said passageway, said passageway having a width less than the width of said film whereby said film is bowed transversely as it passes through said passageway thereby facilitating the movement of said film under and out from under said annular flanges.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |