US3683771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-developing camera
Assignee: Polaroid Corp
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Filing: 1970-08-19
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Granted: 1972-08-15
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Expires: 1990-08-19
Abstract
Abstract A self-developing camera for use with a film pack including a plurality of film units arranged in stacked relation in a container. The camera comprises a film holder for holding the pack with the forwardmost film unit located in position for exposure, a pair of driven processing rollers for advancing an exposed film unit from the camera while distributing a processing liquid within the camera and a film feeder for advancing an exposed film unit from exposure position within the container into the bite of the processing rollers. The camera includes controls for arresting the rotation of the processing rollers with the trailing end of a film unit engaged therebetween so as to retain the trailing end of the extended film unit within the camera and provide the operator with an opportunity to grasp and remove the film completely from the camera. In a preferred embodiment of the camera, the controls also reverse the direction of rotation of the rollers to return the film unit to a storage position within the camera behind the film pack and a door permitting the film unit to be withdrawn. The film holder is moved forwardly out of the path of return movement of the film unit and then rearwardly to return the film pack to exposure position.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50; G03B17/52
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
108 words
In photographic apparatus including a pair of juxtaposed pressure-applying members movable to advance a photographic film unit between said members part way from said apparatus while distributing a liquid processing agent within the film unit, the improvement comprising, in combination: control means for arresting the motion of said pressure-applying members with the trailing end of the film unit engaged between said members and the major portion of said film unit extending from said apparatus, said control means including means responsive to separation of said pressure-applying members for sensing the engagement of the trailing end section of a film unit between said pressure-applying members to arrest the motion thereof.
Claim 2
Dependent Claim
108 words
In photographic apparatus including a pair of juxtaposed pressure-applying members movable to advance a photographic film unit between said members part way from said apparatus while distributing a liquid processing agent within the film unit, the improvement comprising, in combination: control means for arresting the motion of said pressure-applying members with the trailing end of the film unit engaged between said members and the major portion of said film unit extending from said apparatus, said control means including means responsive to separation of said pressure-applying members for sensing the engagement of the trailing end section of a film unit between said pressure-applying members to arrest the motion thereof.
Claim 3
Dependent Claim
41 words
Photographic apparatus as defined in claim 1 wherein said control means include means for reversing the direction of motion of said pressure-applying members to retract the film unit into said apparatus and advance said film unit into a storage position therein.
Claim 4
Dependent Claim
38 words
Photographic apparatus as defined in claim 2 including electric motor for driving said pressure-applying members to advance a film unit therebetween and wherein said control means include means for reversing the polarity of the current energizing said motor.
Claim 5
Dependent Claim
45 words
Photographic apparatus as defined in claim 2 including holding means for supporting a photographic film unit in position for exposure and guide means for guiding a film unit into a storage position behind said exposure position during retraction of said film unit into said apparatus.
Claim 6
Dependent Claim
50 words
Photographic apparatus as defined in claim 4 wherein said holding means include means for supporting a container of stacked photographic film units with the forward-most film unit located in position for exposure and said guide means are adapted to guide a film unit into a storage position behind said container.
Claim 7
Dependent Claim
33 words
Photographic apparatus as defined in claim 4 including means at the rear thereof providing access to the interior of said apparatus to permit removal of a film unit located in storage position therein.
Claim 8
Dependent Claim
43 words
Photographic apparatus as defined in claim 4 including first displacement means for moving said holding means forwardly from exposure position to permit the return movement of a film unit in a storage position behind said holding means during retraction of said film unit.
Claim 9
Dependent Claim
73 words
Photographic apparatus as defined in claim 7 wherein said pressure-applying members include a pair of juxtaposed rollers rotatable in engagement with a film unit to advance said film unit between said rollers and said control means include means for initiating the forward displacement of said holding means and reversing the direction of rotation of said rollers to advance a film unit, engaged between said rollers, into a storage position behind said holding means.
Claim 10
Dependent Claim
29 words
Photographic apparatus as defined in claim 7 further including means for returning said holding means to said exposure position following return movement of a film unit into storage position.
Claim 11
Dependent Claim
41 words
Photographic apparatus as defined in claim 7 wherein said first displacement means include first resilient means biasing said holding means forwardly and said control means include means for releasing said holding means for movement under the bias of said resilient means.
Claim 12
Dependent Claim
29 words
Photographic apparatus as defined in claim 10 further including second displacement means for returning said holding means to said exposure position against the bias of said first resilient means.
Claim 13
Dependent Claim
41 words
Photographic apparatus as defined in claim 11 wherein said control means include means responsive to movement of a film unit from engagement with said pressure-applying members for actuating said second displacement means to return said holding means to said exposure position.
Claim 14
Dependent Claim
31 words
Photographic apparatus as defined in claim 11 wherein said second displacement means include a second spring for acting against said resilient means to return said holding means to said exposure position.
Claim 15
Dependent Claim
39 words
Photographic apparatus as defined in claim 13 further including drive means for moving said pressure-applying members to move a film unit engaged therebetween and means for tensioning said spRing during movement of a film unit by said pressure-applying members.
Claim 16
Dependent Claim
30 words
Photographic apparatus as defined in claim 4 further including means mounted on said holding means for advancing an exposed film unit from exposure position into engagement with said pressure-applying members.
Claim 17
Dependent Claim
71 words
Photographic apparatus as defined in claim 2 wherein said pressure-applying members include a pair of juxtaposed rollers rotatable in engagement with a film unit to move said film unit between said rollers, said apparatus further including impeller means for engaging and moving the end section of a film unit toward storage position away from the bite of said rollers following movement of the film unit by the rollers from engagement therebetween.
Claim 18
Dependent Claim
53 words
Photographic apparatus as defined in claim 16 wherein said impeller means include a movable film-engaging member extending into the path of movement of a film unit between said pressure-applying members and means for biasing said film-engaging member in a direction opposite to the direction of movement of a film unit from said apparatus.
Claim 19
Dependent Claim
56 words
Photographic apparatus as defined in claim 17 further including holding means for supporting a photographic film unit in position for exposure and first displacement means for moving said holding means forwardly from exposure position to permit the return movement of a film unit into storage position behind said holding means during retraction of a film unit.
Claim 20
Dependent Claim
31 words
Photographic apparatus as defined in claim 18 wherein said first displacement means include a first spring for driving said first displacement means to move said holding means forwardly from exposure position.
Claim 21
Dependent Claim
21 words
Photographic apparatus as defined in claim 19 further including second displacement means for retuning said holding means to said exposure position.
Claim 22
Dependent Claim
55 words
Photographic apparatus as defined in claim 20 wherein said second displacement means includes a second spring for driving said second displacement means and said apparatus further includes drive means for operating said pressure-applying members to move film unit therebetween and tensioning one of said springs during movement of a film unit between said pressure-applying members.
Claim 23
Dependent Claim
55 words
Photographic apparatus as defined in claim 21 wherein said impeller means include means responsive to movement of said film-engaging member in the direction of return movement of a film unit for initiating the operation of said second displacement means upon movement of a film unit by said impeller means from engagement with said pressure-applying members.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |