Patent US4076270A successfully refreshed from Google Patents.
Patent EP0378170A2 successfully refreshed from Google Patents.
EP0378170A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Film cassette
Assignee: Eastman Kodak Co
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Filing: 1990-01-09
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Granted: —
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Expires: 2010-01-09
Abstract
Abstract In a film cassette (1), a film retention member (73) located along a film passage slit (25) to the outside of the cassette shell (3) is adapted to enter a trapping perforation (75) in a leader portion (43) of the filmstrip to secure the leader portion in the slit prior to initial advance of the filmstrip from the cassette shell or following midroll return of the filmstrip to the cassette shell. A trailing end portion (39) of the filmstrip has a cut-out which enables the filmstrip to fall away from a support (81) for normally positioning the filmstrip within range of the retention member (73), when the filmstrip is advanced sufficiently from the cassette shell (3) to move the cut-out to the support. The support (81) includes an exposure-completed indicator (EXP) that is normally covered by the filmstrip and therefore is not visible through a window (87) in the cassette shell(3). When the filmstrip falls away from the support (81), the indicator (EXP) is uncovered and can be viewed through the window (87).
Inventors
- 👤 Donald Malcolm C/O Eastman Kodak Company Harvey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 09:53
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B2217/00; G03B2217/26; G03B2217/263; G03B2217/266
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
209 words
A film cassette (1) wherein a film spool (5) having a filmstrip coiled about it is rotatable to advance said filmstrip through a film passage slit (25) to the outside of the cassette shell (3) and to return the filmstrip through said film passage slit to the inside of said cassette shell, is characterized in that: film securement means (73) is disposed along said film passage slit (25) for engaging a leader portion (43) of said filmstrip when the filmstrip is returned to the inside of said cassette shell (3); film support means (81) is located proximate said film securement means (73) for supporting said filmstrip within range of the film securement means to permit the securement means to engage said leader portion (43); and a trailing portion (39) of said filmstrip, remote from said leader portion (43), is being configured to enable the filmstrip to fall away from said film support means (81) to move out of range of said film securement means (73) when the filmstrip is advanced sufficiently from said cassette shell (3) to position said trailing portion at the film support means, to prevent said film securement means from engaging said leader portion when said filmstrip is returned to the inside of said cassette shell.
Claim 2
Dependent Claim
209 words
A film cassette (1) wherein a film spool (5) having a filmstrip coiled about it is rotatable to advance said filmstrip through a film passage slit (25) to the outside of the cassette shell (3) and to return the filmstrip through said film passage slit to the inside of said cassette shell, is characterized in that: film securement means (73) is disposed along said film passage slit (25) for engaging a leader portion (43) of said filmstrip when the filmstrip is returned to the inside of said cassette shell (3); film support means (81) is located proximate said film securement means (73) for supporting said filmstrip within range of the film securement means to permit the securement means to engage said leader portion (43); and a trailing portion (39) of said filmstrip, remote from said leader portion (43), is being configured to enable the filmstrip to fall away from said film support means (81) to move out of range of said film securement means (73) when the filmstrip is advanced sufficiently from said cassette shell (3) to position said trailing portion at the film support means, to prevent said film securement means from engaging said leader portion when said filmstrip is returned to the inside of said cassette shell.
Claim 3
Dependent Claim
52 words
The film cassette (1) as recited in Claim 1, wherein said film support means (81) is disposed to extend partially widthwise of said filmstrip to support the filmstrip, and said trailing portion (39) of the filmstrip has a reduced width which enables the filmstrip to fall away from said film support means.
Claim 4
Dependent Claim
69 words
The film cassette (1) as recited in Claims 1 or 2, wherein exposure-completed indicator means (EXP) is positioned on said film support means (81) to be uncovered by said filmstrip when the filmstrip falls away from the film support means, and window means (81) defines an opening in said cassette shell (3) for permitting said indicator means (EXP) to be viewed when it is not covered by said filmstrip.
Claim 5
Dependent Claim
45 words
The film cassette (1) as recited in Claim 2, wherein said leader portion (43) of the filmstrip includes a trapping perforation (75), and said film securement means (73) includes a film retention member (73) adapted to enter said trapping perforation to engage said leader portion.
Claim 6
Dependent Claim
110 words
The film cassette (1) as recited in Claim 4, wherein said film retention member (73) is ramped relative to a direction said filmstrip is advanced through said film passage slit (25) to the outside of said cassette shell (3) to allow disengagement of said leader portion (43) of the filmstrip from the film retention member in response to movement of the filmstrip in that direction but is configured relative to a direction said filmstrip is returned through said film passage slit to the inside of said cassette shell to prevent disengagement of said leader portion from said film retention member should said filmstrip be urged to move in that direction.
Claim 7
Dependent Claim
73 words
The film cassette (1) as recited in Claim 4, wherein the reduced width of the trailing portion (39) of said filmstrip is effected by a cut-out (83) in one longitudinal edge (85) of the filmstrip, said trapping perforation (75) of the leader portion (43) of said filmstrip is located proximate the same longitudinal edge, and said filmstrip includes a series of metering perforations (89) extending proximate another longitudinal edge (91) of the filmstrip.
References Cited (Backward Citations)
No citation records indexed.
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