Patent US3892477A successfully refreshed from Google Patents.
US3892477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewer providing automatic cassette ejection
Assignee: Polaroid Corp
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Filing: 1974-01-02
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Granted: 1975-07-01
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Expires: 1994-01-02
Abstract
Abstract Projector apparatus employing a cassette-latching shaft member which automatically locates and locks a photographic cassette in an operative location responsive to insertion of the cassette in a cassette-receiving element of the apparatus. Displacement of the shaft member to its cassette-locking position allows engagement of other cooperating elements of the apparatus with the cassette and initiates operation of the latter through a preprogrammed sequence for projection including transport of the film in a forward and rewind direction. Following completion of the film rewind, the cooperating elements and the shaft member are automatically disengaged from the cassette, the latter is partially ejected and the apparatus turned off. The apparatus is also configured for operation of a multipurpose cassette which includes a processor station adapted to apply processing fluid to the film strip during its first rewind following exposure, and when the cassette is unprocessed, the apparatus automatically processes the cassette during the first film transport cycle and repeats the cycle prior to cassette ejection so as to program the latter through both a process and projection mode.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:43
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/26; G03B17/265; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
363 words
Photographic projection apparatus for use with a cassette containing a first and second rotatably mounted spool and an elongated image-bearing film strip having its ends respectively connected to the spools and being initially substantially entirely coiled around said first spool, said apparatus comprising: a housing having a slot formed therein, said slot being configured to have at least a major portion of the cassette inserted thereinto; means within said housing fixedly located with respect thereto for receiving the cassette as it is inserted through said slot and locating the cassette at an operative position within said housing in alignment with said slot. a pair of drive shafts initially positioned within said housing so as not to be contacted by the cassette as it is inserted through said slot into said receiving and locating means; normally unenergized film image projection means; means within said housing automatically responsive to the insertion of the cassette into said receiving and locating means for displacing said drive shafts from their said initial positions into respective engagement with the cassette''s spools, means responsive to movement of said drive shafts into engagement with said spools; for energizing said film image projection means and for energizing said drive shaft engaged with said second cassette spool to facilitate the progressive advancement of the film strip into operative relationship with said film image projection means and the coiling of the film strip around said second cassette spool, and means for energizing said drive shaft engaging said first cassette spool to effect the return of the film strip to its original position within the cassette, for returning said drive shafts to their original positions within said housing, for deenergizing said drive shafts and said film image projection means and for displacing the cassette outwardly from its operative position within said housing through said slot, the initiation and termination of the entire operation and control of said apparatus thus being solely and completely responsive to the single manual step of an operator''s inserting the cassette into said slot and said apparatus thus serving automatically to condition the cassette for repetitive such use in said apparatus prior to its automatically effecting saId displacement of the cassette.
Claim 2
Dependent Claim
363 words
Photographic projection apparatus for use with a cassette containing a first and second rotatably mounted spool and an elongated image-bearing film strip having its ends respectively connected to the spools and being initially substantially entirely coiled around said first spool, said apparatus comprising: a housing having a slot formed therein, said slot being configured to have at least a major portion of the cassette inserted thereinto; means within said housing fixedly located with respect thereto for receiving the cassette as it is inserted through said slot and locating the cassette at an operative position within said housing in alignment with said slot. a pair of drive shafts initially positioned within said housing so as not to be contacted by the cassette as it is inserted through said slot into said receiving and locating means; normally unenergized film image projection means; means within said housing automatically responsive to the insertion of the cassette into said receiving and locating means for displacing said drive shafts from their said initial positions into respective engagement with the cassette''s spools, means responsive to movement of said drive shafts into engagement with said spools; for energizing said film image projection means and for energizing said drive shaft engaged with said second cassette spool to facilitate the progressive advancement of the film strip into operative relationship with said film image projection means and the coiling of the film strip around said second cassette spool, and means for energizing said drive shaft engaging said first cassette spool to effect the return of the film strip to its original position within the cassette, for returning said drive shafts to their original positions within said housing, for deenergizing said drive shafts and said film image projection means and for displacing the cassette outwardly from its operative position within said housing through said slot, the initiation and termination of the entire operation and control of said apparatus thus being solely and completely responsive to the single manual step of an operator''s inserting the cassette into said slot and said apparatus thus serving automatically to condition the cassette for repetitive such use in said apparatus prior to its automatically effecting saId displacement of the cassette.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |