Patent US1996431A successfully refreshed from Google Patents.
Patent US3733679A successfully refreshed from Google Patents.
US3733679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic cassette loading
Assignee: Polaroid Corp
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Filing: 1971-04-21
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Granted: 1973-05-22
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Expires: 1991-04-21
Abstract
Abstract Cassettes in which photographic film units are contained and exposed are loaded with battery means, spring means and photographic film units by forming a stack of components, compressing the stack and inserting it partially into the mouth of an open cassette, removing the compressive force and inserting the stack or components the rest of the way into the cassette.
Inventors
- 👤 L Bruneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:50
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/44; G03B; G03B17/00; G03B17/28; G03B17/32; G03B17/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49828; Y10T29/49831
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
A method for loading a cassette with photographic film units which comprises: providing a cassette having a forward wall including a lighttransmitting portion through which a film unit can be exposed, and further having an opening at one end for receiving the ultimate contents of the cassette, one side of said opening being defined by an edge of said forward wall; stacking, in alignment with said opening, components comprising spring means, a multiplicity of photographic film units and a dark slide; applying first compression means to said components to compress said spring means; moving said compressed stacked components toward said opening; engaging the leading end of said stacked components by second compression means to maintain compression of said spring after disengagement of said first compression means; disengaging said first compression means from said stacked components following engagement of said second compression means; and thereafter moving said components fully into said cassette.
Claim 2
Independent Claim
151 words
A method for loading a cassette with photographic film units which comprises: providing a cassette having a forward wall including a lighttransmitting portion through which a film unit can be exposed, and further having an opening at one end for receiving the ultimate contents of the cassette, one side of said opening being defined by an edge of said forward wall; stacking, in alignment with said opening, components comprising spring means, a multiplicity of photographic film units and a dark slide; applying first compression means to said components to compress said spring means; moving said compressed stacked components toward said opening; engaging the leading end of said stacked components by second compression means to maintain compression of said spring after disengagement of said first compression means; disengaging said first compression means from said stacked components following engagement of said second compression means; and thereafter moving said components fully into said cassette.
Claim 3
Dependent Claim
81 words
The method of claim 1 wherein said stacked components include a substantially planar battery, said battery is aligned substantially parallel with said photographic film units and has integral therewith terminals capable of mating with external contacts, said cassette comprises a rear wall having two apertures, and said terminals of said battery are aligned with the apertures of said rear wall after full movement of said stacked components into said cassette whereby access to said terminals by said external contacts is facilitated.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said second compression means comprises the walls of said cassette which define said opening.
Claim 5
Dependent Claim
44 words
The method of claim 3 wherein said cassette comprises, as a hinged element depending from an edge of one wall thereof defining said opening, an opening closure wall which is maintained by holding means is an open position during component loading into the cassette.
Claim 6
Dependent Claim
25 words
The method of claim 4 wherein said closure wall provides an egress means for said film units when in the closure position across said opening.
Claim 7
Dependent Claim
35 words
The method of claim 4 wherein after said components are fully loaded into said cassette, said hinged wall is moved into an opening closure position and fixed in such a position by electrosonic welding means.
Claim 8
Dependent Claim
24 words
The method of claim 3 wherein said spring means comprises a platen having a cross member over which said first compression force is applied.
Claim 9
Dependent Claim
32 words
The method of claim 7 wherein said stacked components comprise, in order, from the rear wall of said cassette: said battery means; said platen; said photographic film units; and said dark slide.
Claim 10
Dependent Claim
52 words
The method of Claim 1 wherein said film units comprise rupturable containers retaining a liquid processing composition, said containers being located substantially adjacent the trailing end, each of said film units comprising said stacked components, and said first compression means is applied in an area other than the area over said container.
Claim 11
Independent Claim
248 words
A method for loading a cassette with photographic film units which comprises: providing a cassette having a forward wall including a light-transmitting portion through which a film unit can be exposed, a rear wall which comprises two apertures, and an opening at one end for receiving the ultimate contents of the cassette, one side of said opening being defined by an edge of said forward wall and another side being defined by an edge of said rear wall, said forward wall and said rear wall converging toward the end of said cassette furthest from said opening; stacking, in alignment with said opening, components comprising a substantially planar battery comprising terminals for supplying power to external contacts, a platen comprising a cross member over which compression force may be applied; a multiplicity of film units comprising rupturable containers retaining a liquid processing composition located adjacent the trailing ends of said film units; and a dark slide; applying first compression means to said components in an area over said platen cross-member thereby compressing said platen; moving said compressed stacked components toward said opening; engaging the leading end of said compressed stacked components by second compression means capable of maintaining compression of said platen after disengagement of said first compression means; stopping movement of said stacked components; disengaging said first compression means from said stacked components; and moving said stacked components fully into said cassette whereby said battery terminals are accessable to external contacts through said apertures of said rear wall.
Claim 12
Independent Claim
248 words
A method for loading a cassette with photographic film units which comprises: providing a cassette having a forward wall including a light-transmitting portion through which a film unit can be exposed, a rear wall which comprises two apertures, and an opening at one end for receiving the ultimate contents of the cassette, one side of said opening being defined by an edge of said forward wall and another side being defined by an edge of said rear wall, said forward wall and said rear wall converging toward the end of said cassette furthest from said opening; stacking, in alignment with said opening, components comprising a substantially planar battery comprising terminals for supplying power to external contacts, a platen comprising a cross member over which compression force may be applied; a multiplicity of film units comprising rupturable containers retaining a liquid processing composition located adjacent the trailing ends of said film units; and a dark slide; applying first compression means to said components in an area over said platen cross-member thereby compressing said platen; moving said compressed stacked components toward said opening; engaging the leading end of said compressed stacked components by second compression means capable of maintaining compression of said platen after disengagement of said first compression means; stopping movement of said stacked components; disengaging said first compression means from said stacked components; and moving said stacked components fully into said cassette whereby said battery terminals are accessable to external contacts through said apertures of said rear wall.
References Cited (Backward Citations)
US3325889A
Cited
US3457627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |